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https://github.com/ekeeke/Genesis-Plus-GX.git
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4204 lines
107 KiB
C
4204 lines
107 KiB
C
/***************************************************************************************
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* Genesis Plus
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* Video Display Processor (Modes 0, 1, 2, 3, 4 & 5 rendering)
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*
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* Support for SG-1000, Master System (315-5124 & 315-5246), Game Gear & Mega Drive VDP
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*
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* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Charles Mac Donald (original code)
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* Copyright (C) 2007-2013 Eke-Eke (Genesis Plus GX)
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*
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* Redistribution and use of this code or any derivative works are permitted
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* provided that the following conditions are met:
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*
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* - Redistributions may not be sold, nor may they be used in a commercial
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* product or activity.
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*
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* - Redistributions that are modified from the original source must include the
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* complete source code, including the source code for all components used by a
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* binary built from the modified sources. However, as a special exception, the
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* source code distributed need not include anything that is normally distributed
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* (in either source or binary form) with the major components (compiler, kernel,
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* and so on) of the operating system on which the executable runs, unless that
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* component itself accompanies the executable.
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*
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* - Redistributions must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************************/
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#include "shared.h"
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#include "md_ntsc.h"
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#include "sms_ntsc.h"
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/*** NTSC Filters ***/
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extern md_ntsc_t *md_ntsc;
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extern sms_ntsc_t *sms_ntsc;
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/* Output pixels type*/
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#if defined(USE_8BPP_RENDERING)
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#define PIXEL_OUT_T uint8
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#elif defined(USE_32BPP_RENDERING)
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#define PIXEL_OUT_T uint32
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#else
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#define PIXEL_OUT_T uint16
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#endif
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/* Pixel priority look-up tables information */
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#define LUT_MAX (6)
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#define LUT_SIZE (0x10000)
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#ifdef ALIGN_LONG
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#undef READ_LONG
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#undef WRITE_LONG
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INLINE uint32 READ_LONG(void *address)
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{
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if ((uint32)address & 3)
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{
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#ifdef LSB_FIRST /* little endian version */
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return ( *((uint8 *)address) +
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(*((uint8 *)address+1) << 8) +
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(*((uint8 *)address+2) << 16) +
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(*((uint8 *)address+3) << 24) );
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#else /* big endian version */
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return ( *((uint8 *)address+3) +
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(*((uint8 *)address+2) << 8) +
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(*((uint8 *)address+1) << 16) +
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(*((uint8 *)address) << 24) );
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#endif /* LSB_FIRST */
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}
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else return *(uint32 *)address;
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}
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INLINE void WRITE_LONG(void *address, uint32 data)
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{
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if ((uint32)address & 3)
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{
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#ifdef LSB_FIRST
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*((uint8 *)address) = data;
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*((uint8 *)address+1) = (data >> 8);
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*((uint8 *)address+2) = (data >> 16);
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*((uint8 *)address+3) = (data >> 24);
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#else
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*((uint8 *)address+3) = data;
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*((uint8 *)address+2) = (data >> 8);
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*((uint8 *)address+1) = (data >> 16);
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*((uint8 *)address) = (data >> 24);
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#endif /* LSB_FIRST */
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return;
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}
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else *(uint32 *)address = data;
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}
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#endif /* ALIGN_LONG */
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/* Draw 2-cell column (8-pixels high) */
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/*
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Pattern cache base address: VHN NNNNNNNN NNYYYxxx
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with :
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x = Pattern Pixel (0-7)
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Y = Pattern Row (0-7)
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N = Pattern Number (0-2047) from pattern attribute
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H = Horizontal Flip bit from pattern attribute
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V = Vertical Flip bit from pattern attribute
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*/
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#define GET_LSB_TILE(ATTR, LINE) \
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atex = atex_table[(ATTR >> 13) & 7]; \
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src = (uint32 *)&bg_pattern_cache[(ATTR & 0x00001FFF) << 6 | (LINE)];
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#define GET_MSB_TILE(ATTR, LINE) \
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atex = atex_table[(ATTR >> 29) & 7]; \
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src = (uint32 *)&bg_pattern_cache[(ATTR & 0x1FFF0000) >> 10 | (LINE)];
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/* Draw 2-cell column (16 pixels high) */
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/*
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Pattern cache base address: VHN NNNNNNNN NYYYYxxx
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with :
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x = Pattern Pixel (0-7)
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Y = Pattern Row (0-15)
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N = Pattern Number (0-1023)
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H = Horizontal Flip bit
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V = Vertical Flip bit
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*/
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#define GET_LSB_TILE_IM2(ATTR, LINE) \
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atex = atex_table[(ATTR >> 13) & 7]; \
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src = (uint32 *)&bg_pattern_cache[((ATTR & 0x000003FF) << 7 | (ATTR & 0x00001800) << 6 | (LINE)) ^ ((ATTR & 0x00001000) >> 6)];
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#define GET_MSB_TILE_IM2(ATTR, LINE) \
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atex = atex_table[(ATTR >> 29) & 7]; \
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src = (uint32 *)&bg_pattern_cache[((ATTR & 0x03FF0000) >> 9 | (ATTR & 0x18000000) >> 10 | (LINE)) ^ ((ATTR & 0x10000000) >> 22)];
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/*
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One column = 2 tiles
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Two pattern attributes are written in VRAM as two consecutives 16-bit words:
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P = priority bit
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C = color palette (2 bits)
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V = Vertical Flip bit
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H = Horizontal Flip bit
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N = Pattern Number (11 bits)
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(MSB) PCCVHNNN NNNNNNNN (LSB) (MSB) PCCVHNNN NNNNNNNN (LSB)
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PATTERN1 PATTERN2
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Both pattern attributes are read from VRAM as one 32-bit word:
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LIT_ENDIAN: (MSB) PCCVHNNN NNNNNNNN PCCVHNNN NNNNNNNN (LSB)
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PATTERN2 PATTERN1
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BIG_ENDIAN: (MSB) PCCVHNNN NNNNNNNN PCCVHNNN NNNNNNNN (LSB)
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PATTERN1 PATTERN2
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In line buffers, one pixel = one byte: (msb) 0Pppcccc (lsb)
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with:
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P = priority bit (from pattern attribute)
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p = color palette (from pattern attribute)
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c = color data (from pattern cache)
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One pattern = 8 pixels = 8 bytes = two 32-bit writes per pattern
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*/
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#ifdef ALIGN_LONG
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#ifdef LSB_FIRST
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#define DRAW_COLUMN(ATTR, LINE) \
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GET_LSB_TILE(ATTR, LINE) \
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WRITE_LONG(dst, src[0] | atex); \
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dst++; \
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WRITE_LONG(dst, src[1] | atex); \
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dst++; \
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GET_MSB_TILE(ATTR, LINE) \
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WRITE_LONG(dst, src[0] | atex); \
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dst++; \
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WRITE_LONG(dst, src[1] | atex); \
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dst++;
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#define DRAW_COLUMN_IM2(ATTR, LINE) \
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GET_LSB_TILE_IM2(ATTR, LINE) \
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WRITE_LONG(dst, src[0] | atex); \
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dst++; \
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WRITE_LONG(dst, src[1] | atex); \
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dst++; \
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GET_MSB_TILE_IM2(ATTR, LINE) \
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WRITE_LONG(dst, src[0] | atex); \
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dst++; \
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WRITE_LONG(dst, src[1] | atex); \
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dst++;
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#else
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#define DRAW_COLUMN(ATTR, LINE) \
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GET_MSB_TILE(ATTR, LINE) \
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WRITE_LONG(dst, src[0] | atex); \
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dst++; \
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WRITE_LONG(dst, src[1] | atex); \
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dst++; \
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GET_LSB_TILE(ATTR, LINE) \
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WRITE_LONG(dst, src[0] | atex); \
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dst++; \
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WRITE_LONG(dst, src[1] | atex); \
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dst++;
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#define DRAW_COLUMN_IM2(ATTR, LINE) \
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GET_MSB_TILE_IM2(ATTR, LINE) \
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WRITE_LONG(dst, src[0] | atex); \
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dst++; \
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WRITE_LONG(dst, src[1] | atex); \
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dst++; \
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GET_LSB_TILE_IM2(ATTR, LINE) \
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WRITE_LONG(dst, src[0] | atex); \
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dst++; \
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WRITE_LONG(dst, src[1] | atex); \
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dst++;
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#endif
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#else /* NOT ALIGNED */
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#ifdef LSB_FIRST
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#define DRAW_COLUMN(ATTR, LINE) \
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GET_LSB_TILE(ATTR, LINE) \
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*dst++ = (src[0] | atex); \
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*dst++ = (src[1] | atex); \
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GET_MSB_TILE(ATTR, LINE) \
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*dst++ = (src[0] | atex); \
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*dst++ = (src[1] | atex);
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#define DRAW_COLUMN_IM2(ATTR, LINE) \
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GET_LSB_TILE_IM2(ATTR, LINE) \
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*dst++ = (src[0] | atex); \
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*dst++ = (src[1] | atex); \
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GET_MSB_TILE_IM2(ATTR, LINE) \
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*dst++ = (src[0] | atex); \
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*dst++ = (src[1] | atex);
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#else
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#define DRAW_COLUMN(ATTR, LINE) \
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GET_MSB_TILE(ATTR, LINE) \
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*dst++ = (src[0] | atex); \
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*dst++ = (src[1] | atex); \
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GET_LSB_TILE(ATTR, LINE) \
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*dst++ = (src[0] | atex); \
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*dst++ = (src[1] | atex);
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#define DRAW_COLUMN_IM2(ATTR, LINE) \
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GET_MSB_TILE_IM2(ATTR, LINE) \
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*dst++ = (src[0] | atex); \
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*dst++ = (src[1] | atex); \
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GET_LSB_TILE_IM2(ATTR, LINE) \
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*dst++ = (src[0] | atex); \
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*dst++ = (src[1] | atex);
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#endif
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#endif /* ALIGN_LONG */
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#ifdef ALT_RENDERER
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/* Draw background tiles directly using priority look-up table */
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/* SRC_A = layer A rendered pixel line (4 bytes = 4 pixels at once) */
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/* SRC_B = layer B cached pixel line (4 bytes = 4 pixels at once) */
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/* Note: cache address is always aligned so no need to use READ_LONG macro */
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/* This might be faster or slower than original method, depending on */
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/* architecture (x86, PowerPC), cache size, memory access speed, etc... */
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#ifdef LSB_FIRST
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#define DRAW_BG_TILE(SRC_A, SRC_B) \
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*lb++ = table[((SRC_B << 8) & 0xff00) | (SRC_A & 0xff)]; \
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*lb++ = table[(SRC_B & 0xff00) | ((SRC_A >> 8) & 0xff)]; \
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*lb++ = table[((SRC_B >> 8) & 0xff00) | ((SRC_A >> 16) & 0xff)]; \
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*lb++ = table[((SRC_B >> 16) & 0xff00) | ((SRC_A >> 24) & 0xff)];
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#else
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#define DRAW_BG_TILE(SRC_A, SRC_B) \
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*lb++ = table[((SRC_B >> 16) & 0xff00) | ((SRC_A >> 24) & 0xff)]; \
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*lb++ = table[((SRC_B >> 8) & 0xff00) | ((SRC_A >> 16) & 0xff)]; \
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*lb++ = table[(SRC_B & 0xff00) | ((SRC_A >> 8) & 0xff)]; \
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*lb++ = table[((SRC_B << 8) & 0xff00) | (SRC_A & 0xff)];
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#endif
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#ifdef ALIGN_LONG
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#ifdef LSB_FIRST
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#define DRAW_BG_COLUMN(ATTR, LINE, SRC_A, SRC_B) \
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GET_LSB_TILE(ATTR, LINE) \
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SRC_A = READ_LONG((uint32 *)lb); \
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SRC_B = (src[0] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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SRC_A = READ_LONG((uint32 *)lb); \
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SRC_B = (src[1] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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GET_MSB_TILE(ATTR, LINE) \
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SRC_A = READ_LONG((uint32 *)lb); \
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SRC_B = (src[0] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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SRC_A = READ_LONG((uint32 *)lb); \
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SRC_B = (src[1] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B)
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#define DRAW_BG_COLUMN_IM2(ATTR, LINE, SRC_A, SRC_B) \
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GET_LSB_TILE_IM2(ATTR, LINE) \
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SRC_A = READ_LONG((uint32 *)lb); \
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SRC_B = (src[0] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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SRC_A = READ_LONG((uint32 *)lb); \
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SRC_B = (src[1] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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GET_MSB_TILE_IM2(ATTR, LINE) \
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SRC_A = READ_LONG((uint32 *)lb); \
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SRC_B = (src[0] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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SRC_A = READ_LONG((uint32 *)lb); \
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SRC_B = (src[1] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B)
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#else
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#define DRAW_BG_COLUMN(ATTR, LINE, SRC_A, SRC_B) \
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GET_MSB_TILE(ATTR, LINE) \
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SRC_A = READ_LONG((uint32 *)lb); \
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SRC_B = (src[0] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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SRC_A = READ_LONG((uint32 *)lb); \
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SRC_B = (src[1] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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GET_LSB_TILE(ATTR, LINE) \
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SRC_A = READ_LONG((uint32 *)lb); \
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SRC_B = (src[0] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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SRC_A = READ_LONG((uint32 *)lb); \
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SRC_B = (src[1] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B)
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#define DRAW_BG_COLUMN_IM2(ATTR, LINE, SRC_A, SRC_B) \
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GET_MSB_TILE_IM2(ATTR, LINE) \
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SRC_A = READ_LONG((uint32 *)lb); \
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SRC_B = (src[0] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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SRC_A = READ_LONG((uint32 *)lb); \
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SRC_B = (src[1] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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GET_LSB_TILE_IM2(ATTR, LINE) \
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SRC_A = READ_LONG((uint32 *)lb); \
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SRC_B = (src[0] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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SRC_A = READ_LONG((uint32 *)lb); \
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SRC_B = (src[1] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B)
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#endif
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#else /* NOT ALIGNED */
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#ifdef LSB_FIRST
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#define DRAW_BG_COLUMN(ATTR, LINE, SRC_A, SRC_B) \
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GET_LSB_TILE(ATTR, LINE) \
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SRC_A = *(uint32 *)(lb); \
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SRC_B = (src[0] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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SRC_A = *(uint32 *)(lb); \
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SRC_B = (src[1] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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GET_MSB_TILE(ATTR, LINE) \
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SRC_A = *(uint32 *)(lb); \
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SRC_B = (src[0] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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SRC_A = *(uint32 *)(lb); \
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SRC_B = (src[1] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B)
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#define DRAW_BG_COLUMN_IM2(ATTR, LINE, SRC_A, SRC_B) \
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GET_LSB_TILE_IM2(ATTR, LINE) \
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SRC_A = *(uint32 *)(lb); \
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SRC_B = (src[0] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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SRC_A = *(uint32 *)(lb); \
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SRC_B = (src[1] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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GET_MSB_TILE_IM2(ATTR, LINE) \
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SRC_A = *(uint32 *)(lb); \
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SRC_B = (src[0] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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SRC_A = *(uint32 *)(lb); \
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SRC_B = (src[1] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B)
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#else
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#define DRAW_BG_COLUMN(ATTR, LINE, SRC_A, SRC_B) \
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GET_MSB_TILE(ATTR, LINE) \
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SRC_A = *(uint32 *)(lb); \
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SRC_B = (src[0] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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SRC_A = *(uint32 *)(lb); \
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SRC_B = (src[1] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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GET_LSB_TILE(ATTR, LINE) \
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SRC_A = *(uint32 *)(lb); \
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SRC_B = (src[0] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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SRC_A = *(uint32 *)(lb); \
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SRC_B = (src[1] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B)
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#define DRAW_BG_COLUMN_IM2(ATTR, LINE, SRC_A, SRC_B) \
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GET_MSB_TILE_IM2(ATTR, LINE) \
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SRC_A = *(uint32 *)(lb); \
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SRC_B = (src[0] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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SRC_A = *(uint32 *)(lb); \
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SRC_B = (src[1] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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GET_LSB_TILE_IM2(ATTR, LINE) \
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SRC_A = *(uint32 *)(lb); \
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SRC_B = (src[0] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B) \
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SRC_A = *(uint32 *)(lb); \
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SRC_B = (src[1] | atex); \
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DRAW_BG_TILE(SRC_A, SRC_B)
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#endif
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#endif /* ALIGN_LONG */
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#endif /* ALT_RENDERER */
|
|
|
|
#define DRAW_SPRITE_TILE(WIDTH,ATTR,TABLE) \
|
|
for (i=0;i<WIDTH;i++) \
|
|
{ \
|
|
temp = *src++; \
|
|
if (temp & 0x0f) \
|
|
{ \
|
|
temp |= (lb[i] << 8); \
|
|
lb[i] = TABLE[temp | ATTR]; \
|
|
status |= ((temp & 0x8000) >> 10); \
|
|
} \
|
|
}
|
|
|
|
#define DRAW_SPRITE_TILE_ACCURATE(WIDTH,ATTR,TABLE) \
|
|
for (i=0;i<WIDTH;i++) \
|
|
{ \
|
|
temp = *src++; \
|
|
if (temp & 0x0f) \
|
|
{ \
|
|
temp |= (lb[i] << 8); \
|
|
lb[i] = TABLE[temp | ATTR]; \
|
|
if ((temp & 0x8000) && !(status & 0x20)) \
|
|
{ \
|
|
spr_col = (v_counter << 8) | ((xpos + i + 13) >> 1); \
|
|
status |= 0x20; \
|
|
} \
|
|
} \
|
|
}
|
|
|
|
#define DRAW_SPRITE_TILE_ACCURATE_2X(WIDTH,ATTR,TABLE) \
|
|
for (i=0;i<WIDTH;i+=2) \
|
|
{ \
|
|
temp = *src++; \
|
|
if (temp & 0x0f) \
|
|
{ \
|
|
temp |= (lb[i] << 8); \
|
|
lb[i] = TABLE[temp | ATTR]; \
|
|
if ((temp & 0x8000) && !(status & 0x20)) \
|
|
{ \
|
|
spr_col = (v_counter << 8) | ((xpos + i + 13) >> 1); \
|
|
status |= 0x20; \
|
|
} \
|
|
temp &= 0x00FF; \
|
|
temp |= (lb[i+1] << 8); \
|
|
lb[i+1] = TABLE[temp | ATTR]; \
|
|
if ((temp & 0x8000) && !(status & 0x20)) \
|
|
{ \
|
|
spr_col = (v_counter << 8) | ((xpos + i + 1 + 13) >> 1); \
|
|
status |= 0x20; \
|
|
} \
|
|
} \
|
|
}
|
|
|
|
|
|
/* Pixels conversion macro */
|
|
/* 4-bit color channels are either compressed to 2/3-bit or dithered to 5/6/8-bit equivalents */
|
|
/* 3:3:2 RGB */
|
|
#if defined(USE_8BPP_RENDERING)
|
|
#define MAKE_PIXEL(r,g,b) (((r) >> 1) << 5 | ((g) >> 1) << 2 | (b) >> 2)
|
|
|
|
/* 5:5:5 RGB */
|
|
#elif defined(USE_15BPP_RENDERING)
|
|
#define MAKE_PIXEL(r,g,b) ((r) << 11 | ((r) >> 3) << 10 | (g) << 6 | ((g) >> 3) << 5 | (b) << 1 | (b) >> 3)
|
|
|
|
/* 5:6:5 RGB */
|
|
#elif defined(USE_16BPP_RENDERING)
|
|
#define MAKE_PIXEL(r,g,b) ((r) << 12 | ((r) >> 3) << 11 | (g) << 7 | ((g) >> 2) << 5 | (b) << 1 | (b) >> 3)
|
|
|
|
/* 8:8:8 RGB */
|
|
#elif defined(USE_32BPP_RENDERING)
|
|
#define MAKE_PIXEL(r,g,b) ((r) << 20 | (r) << 16 | (g) << 12 | (g) << 8 | (b) << 4 | (b))
|
|
#endif
|
|
|
|
/* Window & Plane A clipping */
|
|
static struct clip_t
|
|
{
|
|
uint8 left;
|
|
uint8 right;
|
|
uint8 enable;
|
|
} clip[2];
|
|
|
|
/* Pattern attribute (priority + palette bits) expansion table */
|
|
static const uint32 atex_table[] =
|
|
{
|
|
0x00000000,
|
|
0x10101010,
|
|
0x20202020,
|
|
0x30303030,
|
|
0x40404040,
|
|
0x50505050,
|
|
0x60606060,
|
|
0x70707070
|
|
};
|
|
|
|
/* fixed Master System palette for Modes 0,1,2,3 */
|
|
static const uint8 tms_crom[16] =
|
|
{
|
|
0x00, 0x00, 0x08, 0x0C,
|
|
0x10, 0x30, 0x01, 0x3C,
|
|
0x02, 0x03, 0x05, 0x0F,
|
|
0x04, 0x33, 0x15, 0x3F
|
|
};
|
|
|
|
/* original SG-1000 palette */
|
|
#if defined(USE_8BPP_RENDERING)
|
|
static const uint8 tms_palette[16] =
|
|
{
|
|
0x00, 0x00, 0x39, 0x79,
|
|
0x4B, 0x6F, 0xC9, 0x5B,
|
|
0xE9, 0xED, 0xD5, 0xD9,
|
|
0x35, 0xCE, 0xDA, 0xFF
|
|
};
|
|
|
|
#elif defined(USE_15BPP_RENDERING)
|
|
static const uint16 tms_palette[16] =
|
|
{
|
|
0x0000, 0x0000, 0x1308, 0x2F6F,
|
|
0x295D, 0x3DDF, 0x6949, 0x23BE,
|
|
0x7D4A, 0x7DEF, 0x6B0A, 0x7330,
|
|
0x12A7, 0x6177, 0x6739, 0x7FFF
|
|
};
|
|
|
|
#elif defined(USE_16BPP_RENDERING)
|
|
static const uint16 tms_palette[16] =
|
|
{
|
|
0x0000, 0x0000, 0x2648, 0x5ECF,
|
|
0x52BD, 0x7BBE, 0xD289, 0x475E,
|
|
0xF2AA, 0xFBCF, 0xD60A, 0xE670,
|
|
0x2567, 0xC2F7, 0xCE59, 0xFFFF
|
|
};
|
|
|
|
#elif defined(USE_32BPP_RENDERING)
|
|
static const uint32 tms_palette[16] =
|
|
{
|
|
0x000000, 0x000000, 0x21C842, 0x5EDC78,
|
|
0x5455ED, 0x7D76FC, 0xD4524D, 0x42EBF5,
|
|
0xFC5554, 0xFF7978, 0xD4C154, 0xE6CE80,
|
|
0x21B03B, 0xC95BB4, 0xCCCCCC, 0xFFFFFF
|
|
};
|
|
#endif
|
|
|
|
/* Cached and flipped patterns */
|
|
static uint8 bg_pattern_cache[0x80000];
|
|
|
|
/* Sprite pattern name offset look-up table (Mode 5) */
|
|
static uint8 name_lut[0x400];
|
|
|
|
/* Bitplane to packed pixel look-up table (Mode 4) */
|
|
static uint32 bp_lut[0x10000];
|
|
|
|
/* Layer priority pixel look-up tables */
|
|
static uint8 lut[LUT_MAX][LUT_SIZE];
|
|
|
|
/* Output pixel data look-up tables*/
|
|
static PIXEL_OUT_T pixel[0x100];
|
|
static PIXEL_OUT_T pixel_lut[3][0x200];
|
|
static PIXEL_OUT_T pixel_lut_m4[0x40];
|
|
|
|
/* Background & Sprite line buffers */
|
|
static uint8 linebuf[2][0x200];
|
|
|
|
/* Sprite limit flag */
|
|
static uint8 spr_ovr;
|
|
|
|
/* Sprite parsing lists */
|
|
typedef struct
|
|
{
|
|
uint16 ypos;
|
|
uint16 xpos;
|
|
uint16 attr;
|
|
uint16 size;
|
|
} object_info_t;
|
|
|
|
static object_info_t obj_info[2][20];
|
|
|
|
/* Sprite Counter */
|
|
static uint8 object_count[2];
|
|
|
|
/* Sprite Collision Info */
|
|
uint16 spr_col;
|
|
|
|
/* Function pointers */
|
|
void (*render_bg)(int line);
|
|
void (*render_obj)(int line);
|
|
void (*parse_satb)(int line);
|
|
void (*update_bg_pattern_cache)(int index);
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* Sprite pattern name offset look-up table function (Mode 5) */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
static void make_name_lut(void)
|
|
{
|
|
int vcol, vrow;
|
|
int width, height;
|
|
int flipx, flipy;
|
|
int i;
|
|
|
|
for (i = 0; i < 0x400; i += 1)
|
|
{
|
|
/* Sprite settings */
|
|
vcol = i & 3;
|
|
vrow = (i >> 2) & 3;
|
|
height = (i >> 4) & 3;
|
|
width = (i >> 6) & 3;
|
|
flipx = (i >> 8) & 1;
|
|
flipy = (i >> 9) & 1;
|
|
|
|
if ((vrow > height) || vcol > width)
|
|
{
|
|
/* Invalid settings (unused) */
|
|
name_lut[i] = -1;
|
|
}
|
|
else
|
|
{
|
|
/* Adjust column & row index if sprite is flipped */
|
|
if(flipx) vcol = (width - vcol);
|
|
if(flipy) vrow = (height - vrow);
|
|
|
|
/* Pattern offset (pattern order is up->down->left->right) */
|
|
name_lut[i] = vrow + (vcol * (height + 1));
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* Bitplane to packed pixel look-up table function (Mode 4) */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
static void make_bp_lut(void)
|
|
{
|
|
int x,i,j;
|
|
uint32 out;
|
|
|
|
/* ---------------------- */
|
|
/* Pattern color encoding */
|
|
/* -------------------------------------------------------------------------*/
|
|
/* 4 byteplanes are required to define one pattern line (8 pixels) */
|
|
/* A single pixel color is coded with 4 bits (c3 c2 c1 c0) */
|
|
/* Each bit is coming from byteplane bits, as explained below: */
|
|
/* pixel 0: c3 = bp3 bit 7, c2 = bp2 bit 7, c1 = bp1 bit 7, c0 = bp0 bit 7 */
|
|
/* pixel 1: c3 = bp3 bit 6, c2 = bp2 bit 6, c1 = bp1 bit 6, c0 = bp0 bit 6 */
|
|
/* ... */
|
|
/* pixel 7: c3 = bp3 bit 0, c2 = bp2 bit 0, c1 = bp1 bit 0, c0 = bp0 bit 0 */
|
|
/* -------------------------------------------------------------------------*/
|
|
|
|
for(i = 0; i < 0x100; i++)
|
|
for(j = 0; j < 0x100; j++)
|
|
{
|
|
out = 0;
|
|
for(x = 0; x < 8; x++)
|
|
{
|
|
/* pixel line data = hh00gg00ff00ee00dd00cc00bb00aa00 (32-bit) */
|
|
/* aa-hh = upper or lower 2-bit values of pixels 0-7 (shifted) */
|
|
out |= (j & (0x80 >> x)) ? (uint32)(8 << (x << 2)) : 0;
|
|
out |= (i & (0x80 >> x)) ? (uint32)(4 << (x << 2)) : 0;
|
|
}
|
|
|
|
/* i = low byte in VRAM (bp0 or bp2) */
|
|
/* j = high byte in VRAM (bp1 or bp3) */
|
|
#ifdef LSB_FIRST
|
|
bp_lut[(j << 8) | (i)] = out;
|
|
#else
|
|
bp_lut[(i << 8) | (j)] = out;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* Layers priority pixel look-up tables functions */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
/* Input (bx): d5-d0=color, d6=priority, d7=unused */
|
|
/* Input (ax): d5-d0=color, d6=priority, d7=unused */
|
|
/* Output: d5-d0=color, d6=priority, d7=zero */
|
|
static uint32 make_lut_bg(uint32 bx, uint32 ax)
|
|
{
|
|
int bf = (bx & 0x7F);
|
|
int bp = (bx & 0x40);
|
|
int b = (bx & 0x0F);
|
|
|
|
int af = (ax & 0x7F);
|
|
int ap = (ax & 0x40);
|
|
int a = (ax & 0x0F);
|
|
|
|
int c = (ap ? (a ? af : bf) : (bp ? (b ? bf : af) : (a ? af : bf)));
|
|
|
|
/* Strip palette & priority bits from transparent pixels */
|
|
if((c & 0x0F) == 0x00) c &= 0x80;
|
|
|
|
return (c);
|
|
}
|
|
|
|
/* Input (bx): d5-d0=color, d6=priority, d7=unused */
|
|
/* Input (sx): d5-d0=color, d6=priority, d7=unused */
|
|
/* Output: d5-d0=color, d6=priority, d7=intensity select (0=half/1=normal) */
|
|
static uint32 make_lut_bg_ste(uint32 bx, uint32 ax)
|
|
{
|
|
int bf = (bx & 0x7F);
|
|
int bp = (bx & 0x40);
|
|
int b = (bx & 0x0F);
|
|
|
|
int af = (ax & 0x7F);
|
|
int ap = (ax & 0x40);
|
|
int a = (ax & 0x0F);
|
|
|
|
int c = (ap ? (a ? af : bf) : (bp ? (b ? bf : af) : (a ? af : bf)));
|
|
|
|
/* Half intensity when both pixels are low priority */
|
|
c |= ((ap | bp) << 1);
|
|
|
|
/* Strip palette & priority bits from transparent pixels */
|
|
if((c & 0x0F) == 0x00) c &= 0x80;
|
|
|
|
return (c);
|
|
}
|
|
|
|
/* Input (bx): d5-d0=color, d6=priority/1, d7=sprite pixel marker */
|
|
/* Input (sx): d5-d0=color, d6=priority, d7=unused */
|
|
/* Output: d5-d0=color, d6=priority, d7=sprite pixel marker */
|
|
static uint32 make_lut_obj(uint32 bx, uint32 sx)
|
|
{
|
|
int c;
|
|
|
|
int bf = (bx & 0x7F);
|
|
int bs = (bx & 0x80);
|
|
int sf = (sx & 0x7F);
|
|
|
|
if((sx & 0x0F) == 0) return bx;
|
|
|
|
c = (bs ? bf : sf);
|
|
|
|
/* Strip palette bits from transparent pixels */
|
|
if((c & 0x0F) == 0x00) c &= 0xC0;
|
|
|
|
return (c | 0x80);
|
|
}
|
|
|
|
|
|
/* Input (bx): d5-d0=color, d6=priority, d7=opaque sprite pixel marker */
|
|
/* Input (sx): d5-d0=color, d6=priority, d7=unused */
|
|
/* Output: d5-d0=color, d6=zero/priority, d7=opaque sprite pixel marker */
|
|
static uint32 make_lut_bgobj(uint32 bx, uint32 sx)
|
|
{
|
|
int c;
|
|
|
|
int bf = (bx & 0x3F);
|
|
int bs = (bx & 0x80);
|
|
int bp = (bx & 0x40);
|
|
int b = (bx & 0x0F);
|
|
|
|
int sf = (sx & 0x3F);
|
|
int sp = (sx & 0x40);
|
|
int s = (sx & 0x0F);
|
|
|
|
if(s == 0) return bx;
|
|
|
|
/* Previous sprite has higher priority */
|
|
if(bs) return bx;
|
|
|
|
c = (sp ? sf : (bp ? (b ? bf : sf) : sf));
|
|
|
|
/* Strip palette & priority bits from transparent pixels */
|
|
if((c & 0x0F) == 0x00) c &= 0x80;
|
|
|
|
return (c | 0x80);
|
|
}
|
|
|
|
/* Input (bx): d5-d0=color, d6=priority, d7=intensity (half/normal) */
|
|
/* Input (sx): d5-d0=color, d6=priority, d7=sprite marker */
|
|
/* Output: d5-d0=color, d6=intensity (half/normal), d7=(double/invalid) */
|
|
static uint32 make_lut_bgobj_ste(uint32 bx, uint32 sx)
|
|
{
|
|
int c;
|
|
|
|
int bf = (bx & 0x3F);
|
|
int bp = (bx & 0x40);
|
|
int b = (bx & 0x0F);
|
|
int bi = (bx & 0x80) >> 1;
|
|
|
|
int sf = (sx & 0x3F);
|
|
int sp = (sx & 0x40);
|
|
int s = (sx & 0x0F);
|
|
int si = sp | bi;
|
|
|
|
if(sp)
|
|
{
|
|
if(s)
|
|
{
|
|
if((sf & 0x3E) == 0x3E)
|
|
{
|
|
if(sf & 1)
|
|
{
|
|
c = (bf | 0x00);
|
|
}
|
|
else
|
|
{
|
|
c = (bx & 0x80) ? (bf | 0x80) : (bf | 0x40);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if(sf == 0x0E || sf == 0x1E || sf == 0x2E)
|
|
{
|
|
c = (sf | 0x40);
|
|
}
|
|
else
|
|
{
|
|
c = (sf | si);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
c = (bf | bi);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if(bp)
|
|
{
|
|
if(b)
|
|
{
|
|
c = (bf | bi);
|
|
}
|
|
else
|
|
{
|
|
if(s)
|
|
{
|
|
if((sf & 0x3E) == 0x3E)
|
|
{
|
|
if(sf & 1)
|
|
{
|
|
c = (bf | 0x00);
|
|
}
|
|
else
|
|
{
|
|
c = (bx & 0x80) ? (bf | 0x80) : (bf | 0x40);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if(sf == 0x0E || sf == 0x1E || sf == 0x2E)
|
|
{
|
|
c = (sf | 0x40);
|
|
}
|
|
else
|
|
{
|
|
c = (sf | si);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
c = (bf | bi);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if(s)
|
|
{
|
|
if((sf & 0x3E) == 0x3E)
|
|
{
|
|
if(sf & 1)
|
|
{
|
|
c = (bf | 0x00);
|
|
}
|
|
else
|
|
{
|
|
c = (bx & 0x80) ? (bf | 0x80) : (bf | 0x40);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if(sf == 0x0E || sf == 0x1E || sf == 0x2E)
|
|
{
|
|
c = (sf | 0x40);
|
|
}
|
|
else
|
|
{
|
|
c = (sf | si);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
c = (bf | bi);
|
|
}
|
|
}
|
|
}
|
|
|
|
if((c & 0x0f) == 0x00) c &= 0xC0;
|
|
|
|
return (c);
|
|
}
|
|
|
|
/* Input (bx): d3-d0=color, d4=palette, d5=priority, d6=zero, d7=sprite pixel marker */
|
|
/* Input (sx): d3-d0=color, d7-d4=zero */
|
|
/* Output: d3-d0=color, d4=palette, d5=zero/priority, d6=zero, d7=sprite pixel marker */
|
|
static uint32 make_lut_bgobj_m4(uint32 bx, uint32 sx)
|
|
{
|
|
int c;
|
|
|
|
int bf = (bx & 0x3F);
|
|
int bs = (bx & 0x80);
|
|
int bp = (bx & 0x20);
|
|
int b = (bx & 0x0F);
|
|
|
|
int s = (sx & 0x0F);
|
|
int sf = (s | 0x10); /* force palette bit */
|
|
|
|
/* Transparent sprite pixel */
|
|
if(s == 0) return bx;
|
|
|
|
/* Previous sprite has higher priority */
|
|
if(bs) return bx;
|
|
|
|
/* note: priority bit is always 0 for Modes 0,1,2,3 */
|
|
c = (bp ? (b ? bf : sf) : sf);
|
|
|
|
return (c | 0x80);
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* Pixel layer merging function */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
INLINE void merge(uint8 *srca, uint8 *srcb, uint8 *dst, uint8 *table, int width)
|
|
{
|
|
do
|
|
{
|
|
*dst++ = table[(*srcb++ << 8) | (*srca++)];
|
|
}
|
|
while (--width);
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* Pixel color lookup tables initialization */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
static void palette_init(void)
|
|
{
|
|
int r, g, b, i;
|
|
|
|
/************************************************/
|
|
/* Each R,G,B color channel is 4-bit with a */
|
|
/* total of 15 different intensity levels. */
|
|
/* */
|
|
/* Color intensity depends on the mode: */
|
|
/* */
|
|
/* normal : xxx0 (0-14) */
|
|
/* shadow : 0xxx (0-7) */
|
|
/* highlight: 1xxx - 1 (7-14) */
|
|
/* mode4 : xxxx(*) (0-15) */
|
|
/* GG mode : xxxx (0-15) */
|
|
/* */
|
|
/* with x = original CRAM value (2, 3 or 4-bit) */
|
|
/* (*) 2-bit CRAM value is expanded to 4-bit */
|
|
/************************************************/
|
|
|
|
/* Initialize Mode 5 pixel color look-up tables */
|
|
for (i = 0; i < 0x200; i++)
|
|
{
|
|
/* CRAM 9-bit value (BBBGGGRRR) */
|
|
r = (i >> 0) & 7;
|
|
g = (i >> 3) & 7;
|
|
b = (i >> 6) & 7;
|
|
|
|
/* Convert to output pixel format */
|
|
pixel_lut[0][i] = MAKE_PIXEL(r,g,b);
|
|
pixel_lut[1][i] = MAKE_PIXEL(r<<1,g<<1,b<<1);
|
|
pixel_lut[2][i] = MAKE_PIXEL(r+7,g+7,b+7);
|
|
}
|
|
|
|
/* Initialize Mode 4 pixel color look-up table */
|
|
for (i = 0; i < 0x40; i++)
|
|
{
|
|
/* CRAM 6-bit value (000BBGGRR) */
|
|
r = (i >> 0) & 3;
|
|
g = (i >> 2) & 3;
|
|
b = (i >> 4) & 3;
|
|
|
|
/* Expand to full range & convert to output pixel format */
|
|
pixel_lut_m4[i] = MAKE_PIXEL((r << 2) | r, (g << 2) | g, (b << 2) | b);
|
|
}
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* Color palette update functions */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
void color_update_m4(int index, unsigned int data)
|
|
{
|
|
switch (system_hw)
|
|
{
|
|
case SYSTEM_GG:
|
|
{
|
|
/* CRAM value (BBBBGGGGRRRR) */
|
|
int r = (data >> 0) & 0x0F;
|
|
int g = (data >> 4) & 0x0F;
|
|
int b = (data >> 8) & 0x0F;
|
|
|
|
/* Convert to output pixel */
|
|
data = MAKE_PIXEL(r,g,b);
|
|
break;
|
|
}
|
|
|
|
case SYSTEM_SG:
|
|
{
|
|
/* Fixed TMS99xx palette */
|
|
if (index & 0x0F)
|
|
{
|
|
/* Colors 1-15 */
|
|
data = tms_palette[index & 0x0F];
|
|
}
|
|
else
|
|
{
|
|
/* Backdrop color */
|
|
data = tms_palette[reg[7] & 0x0F];
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
/* Test M4 bit */
|
|
if (!(reg[0] & 0x04))
|
|
{
|
|
if (system_hw & SYSTEM_MD)
|
|
{
|
|
/* Invalid Mode (black screen) */
|
|
data = 0x00;
|
|
}
|
|
else if (system_hw != SYSTEM_GGMS)
|
|
{
|
|
/* Fixed CRAM palette */
|
|
if (index & 0x0F)
|
|
{
|
|
/* Colors 1-15 */
|
|
data = tms_crom[index & 0x0F];
|
|
}
|
|
else
|
|
{
|
|
/* Backdrop color */
|
|
data = tms_crom[reg[7] & 0x0F];
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Mode 4 palette */
|
|
data = pixel_lut_m4[data & 0x3F];
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/* Input pixel: x0xiiiii (normal) or 01000000 (backdrop) */
|
|
if (reg[0] & 0x04)
|
|
{
|
|
/* Mode 4 */
|
|
pixel[0x00 | index] = data;
|
|
pixel[0x20 | index] = data;
|
|
pixel[0x80 | index] = data;
|
|
pixel[0xA0 | index] = data;
|
|
}
|
|
else
|
|
{
|
|
/* TMS99xx modes (palette bit forced to 1 because Game Gear uses CRAM palette #1) */
|
|
if ((index == 0x40) || (index == (0x10 | (reg[7] & 0x0F))))
|
|
{
|
|
/* Update backdrop color */
|
|
pixel[0x40] = data;
|
|
|
|
/* Update transparent color */
|
|
pixel[0x10] = data;
|
|
pixel[0x30] = data;
|
|
pixel[0x90] = data;
|
|
pixel[0xB0] = data;
|
|
}
|
|
|
|
if (index & 0x0F)
|
|
{
|
|
/* update non-transparent colors */
|
|
pixel[0x00 | index] = data;
|
|
pixel[0x20 | index] = data;
|
|
pixel[0x80 | index] = data;
|
|
pixel[0xA0 | index] = data;
|
|
}
|
|
}
|
|
}
|
|
|
|
void color_update_m5(int index, unsigned int data)
|
|
{
|
|
/* Palette Mode */
|
|
if (!(reg[0] & 0x04))
|
|
{
|
|
/* Color value is limited to 00X00X00X */
|
|
data &= 0x49;
|
|
}
|
|
|
|
if(reg[12] & 0x08)
|
|
{
|
|
/* Mode 5 (Shadow/Normal/Highlight) */
|
|
pixel[0x00 | index] = pixel_lut[0][data];
|
|
pixel[0x40 | index] = pixel_lut[1][data];
|
|
pixel[0x80 | index] = pixel_lut[2][data];
|
|
}
|
|
else
|
|
{
|
|
/* Mode 5 (Normal) */
|
|
data = pixel_lut[1][data];
|
|
|
|
/* Input pixel: xxiiiiii */
|
|
pixel[0x00 | index] = data;
|
|
pixel[0x40 | index] = data;
|
|
pixel[0x80 | index] = data;
|
|
}
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* Background layers rendering functions */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
/* Graphics I */
|
|
void render_bg_m0(int line)
|
|
{
|
|
uint8 color, pattern;
|
|
uint16 name;
|
|
|
|
uint8 *lb = &linebuf[0][0x20];
|
|
uint8 *nt = &vram[((reg[2] << 10) & 0x3C00) + ((line & 0xF8) << 2)];
|
|
uint8 *ct = &vram[((reg[3] << 6) & 0x3FC0)];
|
|
uint8 *pg = &vram[((reg[4] << 11) & 0x3800) + (line & 7)];
|
|
|
|
/* 32 x 8 pixels */
|
|
int width = 32;
|
|
|
|
do
|
|
{
|
|
name = *nt++;
|
|
color = ct[name >> 3];
|
|
pattern = pg[name << 3];
|
|
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 7) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 6) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 5) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 4) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 3) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 2) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 1) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 0) & 1) << 2)) & 0x0F);
|
|
}
|
|
while (--width);
|
|
}
|
|
|
|
/* Text */
|
|
void render_bg_m1(int line)
|
|
{
|
|
uint8 pattern;
|
|
uint8 color = reg[7];
|
|
|
|
uint8 *lb = &linebuf[0][0x20];
|
|
uint8 *nt = &vram[((reg[2] << 10) & 0x3C00) + ((line >> 3) * 40)];
|
|
uint8 *pg = &vram[((reg[4] << 11) & 0x3800) + (line & 7)];
|
|
|
|
/* 40 x 6 pixels */
|
|
int width = 40;
|
|
|
|
/* Left border (8 pixels) */
|
|
memset (lb, 0x40, 8);
|
|
lb += 8;
|
|
|
|
do
|
|
{
|
|
pattern = pg[*nt++];
|
|
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 7) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 6) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 5) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 4) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 3) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 2) & 1) << 2)) & 0x0F);
|
|
}
|
|
while (--width);
|
|
|
|
/* Right borders (8 pixels) */
|
|
memset(lb, 0x40, 8);
|
|
}
|
|
|
|
/* Text + extended PG */
|
|
void render_bg_m1x(int line)
|
|
{
|
|
uint8 pattern;
|
|
uint8 *pg;
|
|
|
|
uint8 color = reg[7];
|
|
|
|
uint8 *lb = &linebuf[0][0x20];
|
|
uint8 *nt = &vram[((reg[2] << 10) & 0x3C00) + ((line >> 3) * 40)];
|
|
|
|
uint16 pg_mask = ~0x3800 ^ (reg[4] << 11);
|
|
|
|
/* 40 x 6 pixels */
|
|
int width = 40;
|
|
|
|
/* Unused bits used as a mask on TMS99xx & 315-5124 VDP only */
|
|
if (system_hw > SYSTEM_SMS)
|
|
{
|
|
pg_mask |= 0x1800;
|
|
}
|
|
|
|
pg = &vram[((0x2000 + ((line & 0xC0) << 5)) & pg_mask) + (line & 7)];
|
|
|
|
/* Left border (8 pixels) */
|
|
memset (lb, 0x40, 8);
|
|
lb += 8;
|
|
|
|
do
|
|
{
|
|
pattern = pg[*nt++ << 3];
|
|
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 7) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 6) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 5) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 4) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 3) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 2) & 1) << 2)) & 0x0F);
|
|
}
|
|
while (--width);
|
|
|
|
/* Right borders (8 pixels) */
|
|
memset(lb, 0x40, 8);
|
|
}
|
|
|
|
/* Graphics II */
|
|
void render_bg_m2(int line)
|
|
{
|
|
uint8 color, pattern;
|
|
uint16 name;
|
|
uint8 *ct, *pg;
|
|
|
|
uint8 *lb = &linebuf[0][0x20];
|
|
uint8 *nt = &vram[((reg[2] << 10) & 0x3C00) + ((line & 0xF8) << 2)];
|
|
|
|
uint16 ct_mask = ~0x3FC0 ^ (reg[3] << 6);
|
|
uint16 pg_mask = ~0x3800 ^ (reg[4] << 11);
|
|
|
|
/* 32 x 8 pixels */
|
|
int width = 32;
|
|
|
|
/* Unused bits used as a mask on TMS99xx & 315-5124 VDP only */
|
|
if (system_hw > SYSTEM_SMS)
|
|
{
|
|
ct_mask |= 0x1FC0;
|
|
pg_mask |= 0x1800;
|
|
}
|
|
|
|
ct = &vram[((0x2000 + ((line & 0xC0) << 5)) & ct_mask) + (line & 7)];
|
|
pg = &vram[((0x2000 + ((line & 0xC0) << 5)) & pg_mask) + (line & 7)];
|
|
|
|
do
|
|
{
|
|
name = *nt++ << 3 ;
|
|
color = ct[name & ct_mask];
|
|
pattern = pg[name];
|
|
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 7) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 6) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 5) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 4) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 3) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 2) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 1) & 1) << 2)) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> (((pattern >> 0) & 1) << 2)) & 0x0F);
|
|
}
|
|
while (--width);
|
|
}
|
|
|
|
/* Multicolor */
|
|
void render_bg_m3(int line)
|
|
{
|
|
uint8 color;
|
|
uint16 name;
|
|
|
|
uint8 *lb = &linebuf[0][0x20];
|
|
uint8 *nt = &vram[((reg[2] << 10) & 0x3C00) + ((line & 0xF8) << 2)];
|
|
uint8 *pg = &vram[((reg[4] << 11) & 0x3800) + ((line >> 2) & 7)];
|
|
|
|
/* 32 x 8 pixels */
|
|
int width = 32;
|
|
|
|
do
|
|
{
|
|
name = *nt++;
|
|
color = pg[name << 3];
|
|
|
|
*lb++ = 0x10 | ((color >> 4) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> 4) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> 4) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> 4) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> 0) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> 0) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> 0) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> 0) & 0x0F);
|
|
}
|
|
while (--width);
|
|
}
|
|
|
|
/* Multicolor + extended PG */
|
|
void render_bg_m3x(int line)
|
|
{
|
|
uint8 color;
|
|
uint16 name;
|
|
uint8 *pg;
|
|
|
|
uint8 *lb = &linebuf[0][0x20];
|
|
uint8 *nt = &vram[((reg[2] << 10) & 0x3C00) + ((line & 0xF8) << 2)];
|
|
|
|
uint16 pg_mask = ~0x3800 ^ (reg[4] << 11);
|
|
|
|
/* 32 x 8 pixels */
|
|
int width = 32;
|
|
|
|
/* Unused bits used as a mask on TMS99xx & 315-5124 VDP only */
|
|
if (system_hw > SYSTEM_SMS)
|
|
{
|
|
pg_mask |= 0x1800;
|
|
}
|
|
|
|
pg = &vram[((0x2000 + ((line & 0xC0) << 5)) & pg_mask) + ((line >> 2) & 7)];
|
|
|
|
do
|
|
{
|
|
name = *nt++;
|
|
color = pg[name << 3];
|
|
|
|
*lb++ = 0x10 | ((color >> 4) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> 4) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> 4) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> 4) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> 0) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> 0) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> 0) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> 0) & 0x0F);
|
|
}
|
|
while (--width);
|
|
}
|
|
|
|
/* Invalid (2+3/1+2+3) */
|
|
void render_bg_inv(int line)
|
|
{
|
|
uint8 color = reg[7];
|
|
|
|
uint8 *lb = &linebuf[0][0x20];
|
|
|
|
/* 40 x 6 pixels */
|
|
int width = 40;
|
|
|
|
/* Left border (8 pixels) */
|
|
memset (lb, 0x40, 8);
|
|
lb += 8;
|
|
|
|
do
|
|
{
|
|
*lb++ = 0x10 | ((color >> 4) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> 4) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> 4) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> 4) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> 0) & 0x0F);
|
|
*lb++ = 0x10 | ((color >> 0) & 0x0F);
|
|
}
|
|
while (--width);
|
|
|
|
/* Right borders (8 pixels) */
|
|
memset(lb, 0x40, 8);
|
|
}
|
|
|
|
/* Mode 4 */
|
|
void render_bg_m4(int line)
|
|
{
|
|
int column;
|
|
uint16 *nt;
|
|
uint32 attr, atex, *src;
|
|
|
|
/* 32 x 8 pixels */
|
|
int width = 32;
|
|
|
|
/* Horizontal scrolling */
|
|
int index = ((reg[0] & 0x40) && (line < 0x10)) ? 0x100 : reg[0x08];
|
|
int shift = index & 7;
|
|
|
|
/* Background line buffer */
|
|
uint32 *dst = (uint32 *)&linebuf[0][0x20 + shift];
|
|
|
|
/* Vertical scrolling */
|
|
int v_line = line + vscroll;
|
|
|
|
/* Pattern name table mask */
|
|
uint16 nt_mask = ~0x3C00 ^ (reg[2] << 10);
|
|
|
|
/* Unused bits used as a mask on TMS99xx & 315-5124 VDP only */
|
|
if (system_hw > SYSTEM_SMS)
|
|
{
|
|
nt_mask |= 0x400;
|
|
}
|
|
|
|
/* Test for extended modes (Master System II & Game gear VDP only) */
|
|
if (bitmap.viewport.h > 192)
|
|
{
|
|
/* Vertical scroll mask */
|
|
v_line = v_line % 256;
|
|
|
|
/* Pattern name Table */
|
|
nt = (uint16 *)&vram[(0x3700 & nt_mask) + ((v_line >> 3) << 6)];
|
|
}
|
|
else
|
|
{
|
|
/* Vertical scroll mask */
|
|
v_line = v_line % 224;
|
|
|
|
/* Pattern name Table */
|
|
nt = (uint16 *)&vram[(0x3800 + ((v_line >> 3) << 6)) & nt_mask];
|
|
}
|
|
|
|
/* Pattern row index */
|
|
v_line = (v_line & 7) << 3;
|
|
|
|
/* Tile column index */
|
|
index = (0x100 - index) >> 3;
|
|
|
|
/* Clip left-most column if required */
|
|
if (shift)
|
|
{
|
|
memset(&linebuf[0][0x20], 0, shift);
|
|
index++;
|
|
}
|
|
|
|
/* Draw tiles */
|
|
for(column = 0; column < width; column++, index++)
|
|
{
|
|
/* Stop vertical scrolling for rightmost eight tiles */
|
|
if((column == 24) && (reg[0] & 0x80))
|
|
{
|
|
/* Clear Pattern name table start address */
|
|
if (bitmap.viewport.h > 192)
|
|
{
|
|
nt = (uint16 *)&vram[(0x3700 & nt_mask) + ((line >> 3) << 6)];
|
|
}
|
|
else
|
|
{
|
|
nt = (uint16 *)&vram[(0x3800 + ((line >> 3) << 6)) & nt_mask];
|
|
}
|
|
|
|
/* Clear Pattern row index */
|
|
v_line = (line & 7) << 3;
|
|
}
|
|
|
|
/* Read name table attribute word */
|
|
attr = nt[index % width];
|
|
#ifndef LSB_FIRST
|
|
attr = (((attr & 0xFF) << 8) | ((attr & 0xFF00) >> 8));
|
|
#endif
|
|
|
|
/* Expand priority and palette bits */
|
|
atex = atex_table[(attr >> 11) & 3];
|
|
|
|
/* Cached pattern data line (4 bytes = 4 pixels at once) */
|
|
src = (uint32 *)&bg_pattern_cache[((attr & 0x7FF) << 6) | (v_line)];
|
|
|
|
/* Copy left & right half, adding the attribute bits in */
|
|
#ifdef ALIGN_DWORD
|
|
WRITE_LONG(dst, src[0] | atex);
|
|
dst++;
|
|
WRITE_LONG(dst, src[1] | atex);
|
|
dst++;
|
|
#else
|
|
*dst++ = (src[0] | atex);
|
|
*dst++ = (src[1] | atex);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/* Mode 5 */
|
|
#ifndef ALT_RENDERER
|
|
void render_bg_m5(int line)
|
|
{
|
|
int column;
|
|
uint32 atex, atbuf, *src, *dst;
|
|
|
|
/* Common data */
|
|
uint32 xscroll = *(uint32 *)&vram[hscb + ((line & hscroll_mask) << 2)];
|
|
uint32 yscroll = *(uint32 *)&vsram[0];
|
|
uint32 pf_col_mask = playfield_col_mask;
|
|
uint32 pf_row_mask = playfield_row_mask;
|
|
uint32 pf_shift = playfield_shift;
|
|
|
|
/* Window & Plane A */
|
|
int a = (reg[18] & 0x1F) << 3;
|
|
int w = (reg[18] >> 7) & 1;
|
|
|
|
/* Plane B width */
|
|
int start = 0;
|
|
int end = bitmap.viewport.w >> 4;
|
|
|
|
/* Plane B scroll */
|
|
#ifdef LSB_FIRST
|
|
uint32 shift = (xscroll >> 16) & 0x0F;
|
|
uint32 index = pf_col_mask + 1 - ((xscroll >> 20) & pf_col_mask);
|
|
uint32 v_line = (line + (yscroll >> 16)) & pf_row_mask;
|
|
#else
|
|
uint32 shift = (xscroll & 0x0F);
|
|
uint32 index = pf_col_mask + 1 - ((xscroll >> 4) & pf_col_mask);
|
|
uint32 v_line = (line + yscroll) & pf_row_mask;
|
|
#endif
|
|
|
|
/* Plane B name table */
|
|
uint32 *nt = (uint32 *)&vram[ntbb + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (v_line & 7) << 3;
|
|
|
|
if(shift)
|
|
{
|
|
/* Plane B line buffer */
|
|
dst = (uint32 *)&linebuf[0][0x10 + shift];
|
|
|
|
atbuf = nt[(index - 1) & pf_col_mask];
|
|
DRAW_COLUMN(atbuf, v_line)
|
|
}
|
|
else
|
|
{
|
|
/* Plane B line buffer */
|
|
dst = (uint32 *)&linebuf[0][0x20];
|
|
}
|
|
|
|
for(column = 0; column < end; column++, index++)
|
|
{
|
|
atbuf = nt[index & pf_col_mask];
|
|
DRAW_COLUMN(atbuf, v_line)
|
|
}
|
|
|
|
if (w == (line >= a))
|
|
{
|
|
/* Window takes up entire line */
|
|
a = 0;
|
|
w = 1;
|
|
}
|
|
else
|
|
{
|
|
/* Window and Plane A share the line */
|
|
a = clip[0].enable;
|
|
w = clip[1].enable;
|
|
}
|
|
|
|
/* Plane A */
|
|
if (a)
|
|
{
|
|
/* Plane A width */
|
|
start = clip[0].left;
|
|
end = clip[0].right;
|
|
|
|
/* Plane A scroll */
|
|
#ifdef LSB_FIRST
|
|
shift = (xscroll & 0x0F);
|
|
index = pf_col_mask + start + 1 - ((xscroll >> 4) & pf_col_mask);
|
|
v_line = (line + yscroll) & pf_row_mask;
|
|
#else
|
|
shift = (xscroll >> 16) & 0x0F;
|
|
index = pf_col_mask + start + 1 - ((xscroll >> 20) & pf_col_mask);
|
|
v_line = (line + (yscroll >> 16)) & pf_row_mask;
|
|
#endif
|
|
|
|
/* Plane A name table */
|
|
nt = (uint32 *)&vram[ntab + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (v_line & 7) << 3;
|
|
|
|
if(shift)
|
|
{
|
|
/* Plane A line buffer */
|
|
dst = (uint32 *)&linebuf[1][0x10 + shift + (start << 4)];
|
|
|
|
/* Window bug */
|
|
if (start)
|
|
{
|
|
atbuf = nt[index & pf_col_mask];
|
|
}
|
|
else
|
|
{
|
|
atbuf = nt[(index - 1) & pf_col_mask];
|
|
}
|
|
|
|
DRAW_COLUMN(atbuf, v_line)
|
|
}
|
|
else
|
|
{
|
|
/* Plane A line buffer */
|
|
dst = (uint32 *)&linebuf[1][0x20 + (start << 4)];
|
|
}
|
|
|
|
for(column = start; column < end; column++, index++)
|
|
{
|
|
atbuf = nt[index & pf_col_mask];
|
|
DRAW_COLUMN(atbuf, v_line)
|
|
}
|
|
|
|
/* Window width */
|
|
start = clip[1].left;
|
|
end = clip[1].right;
|
|
}
|
|
|
|
/* Window */
|
|
if (w)
|
|
{
|
|
/* Window name table */
|
|
nt = (uint32 *)&vram[ntwb | ((line >> 3) << (6 + (reg[12] & 1)))];
|
|
|
|
/* Pattern row index */
|
|
v_line = (line & 7) << 3;
|
|
|
|
/* Plane A line buffer */
|
|
dst = (uint32 *)&linebuf[1][0x20 + (start << 4)];
|
|
|
|
for(column = start; column < end; column++)
|
|
{
|
|
atbuf = nt[column];
|
|
DRAW_COLUMN(atbuf, v_line)
|
|
}
|
|
}
|
|
|
|
/* Merge background layers */
|
|
merge(&linebuf[1][0x20], &linebuf[0][0x20], &linebuf[0][0x20], lut[(reg[12] & 0x08) >> 2], bitmap.viewport.w);
|
|
}
|
|
|
|
void render_bg_m5_vs(int line)
|
|
{
|
|
int column;
|
|
uint32 atex, atbuf, *src, *dst;
|
|
uint32 v_line, *nt;
|
|
|
|
/* Common data */
|
|
uint32 xscroll = *(uint32 *)&vram[hscb + ((line & hscroll_mask) << 2)];
|
|
uint32 yscroll = 0;
|
|
uint32 pf_col_mask = playfield_col_mask;
|
|
uint32 pf_row_mask = playfield_row_mask;
|
|
uint32 pf_shift = playfield_shift;
|
|
uint32 *vs = (uint32 *)&vsram[0];
|
|
|
|
/* Window & Plane A */
|
|
int a = (reg[18] & 0x1F) << 3;
|
|
int w = (reg[18] >> 7) & 1;
|
|
|
|
/* Plane B width */
|
|
int start = 0;
|
|
int end = bitmap.viewport.w >> 4;
|
|
|
|
/* Plane B horizontal scroll */
|
|
#ifdef LSB_FIRST
|
|
uint32 shift = (xscroll >> 16) & 0x0F;
|
|
uint32 index = pf_col_mask + 1 - ((xscroll >> 20) & pf_col_mask);
|
|
#else
|
|
uint32 shift = (xscroll & 0x0F);
|
|
uint32 index = pf_col_mask + 1 - ((xscroll >> 4) & pf_col_mask);
|
|
#endif
|
|
|
|
/* Left-most column vertical scrolling when partially shown horizontally (verified on PAL MD2) */
|
|
/* TODO: check on Genesis 3 models since it apparently behaves differently */
|
|
/* In H32 mode, vertical scrolling is disabled, in H40 mode, same value is used for both planes */
|
|
/* See Formula One / Kawasaki Superbike Challenge (H32) & Gynoug / Cutie Suzuki no Ringside Angel (H40) */
|
|
if (reg[12] & 1)
|
|
{
|
|
yscroll = vs[19] & (vs[19] >> 16);
|
|
}
|
|
|
|
if(shift)
|
|
{
|
|
/* Plane B vertical scroll */
|
|
v_line = (line + yscroll) & pf_row_mask;
|
|
|
|
/* Plane B name table */
|
|
nt = (uint32 *)&vram[ntbb + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (v_line & 7) << 3;
|
|
|
|
/* Plane B line buffer */
|
|
dst = (uint32 *)&linebuf[0][0x10 + shift];
|
|
|
|
atbuf = nt[(index - 1) & pf_col_mask];
|
|
DRAW_COLUMN(atbuf, v_line)
|
|
}
|
|
else
|
|
{
|
|
/* Plane B line buffer */
|
|
dst = (uint32 *)&linebuf[0][0x20];
|
|
}
|
|
|
|
for(column = 0; column < end; column++, index++)
|
|
{
|
|
/* Plane B vertical scroll */
|
|
#ifdef LSB_FIRST
|
|
v_line = (line + (vs[column] >> 16)) & pf_row_mask;
|
|
#else
|
|
v_line = (line + vs[column]) & pf_row_mask;
|
|
#endif
|
|
|
|
/* Plane B name table */
|
|
nt = (uint32 *)&vram[ntbb + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (v_line & 7) << 3;
|
|
|
|
atbuf = nt[index & pf_col_mask];
|
|
DRAW_COLUMN(atbuf, v_line)
|
|
}
|
|
|
|
if (w == (line >= a))
|
|
{
|
|
/* Window takes up entire line */
|
|
a = 0;
|
|
w = 1;
|
|
}
|
|
else
|
|
{
|
|
/* Window and Plane A share the line */
|
|
a = clip[0].enable;
|
|
w = clip[1].enable;
|
|
}
|
|
|
|
/* Plane A */
|
|
if (a)
|
|
{
|
|
/* Plane A width */
|
|
start = clip[0].left;
|
|
end = clip[0].right;
|
|
|
|
/* Plane A horizontal scroll */
|
|
#ifdef LSB_FIRST
|
|
shift = (xscroll & 0x0F);
|
|
index = pf_col_mask + start + 1 - ((xscroll >> 4) & pf_col_mask);
|
|
#else
|
|
shift = (xscroll >> 16) & 0x0F;
|
|
index = pf_col_mask + start + 1 - ((xscroll >> 20) & pf_col_mask);
|
|
#endif
|
|
|
|
if(shift)
|
|
{
|
|
/* Plane A vertical scroll */
|
|
v_line = (line + yscroll) & pf_row_mask;
|
|
|
|
/* Plane A name table */
|
|
nt = (uint32 *)&vram[ntab + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (v_line & 7) << 3;
|
|
|
|
/* Plane A line buffer */
|
|
dst = (uint32 *)&linebuf[1][0x10 + shift + (start << 4)];
|
|
|
|
/* Window bug */
|
|
if (start)
|
|
{
|
|
atbuf = nt[index & pf_col_mask];
|
|
}
|
|
else
|
|
{
|
|
atbuf = nt[(index - 1) & pf_col_mask];
|
|
}
|
|
|
|
DRAW_COLUMN(atbuf, v_line)
|
|
}
|
|
else
|
|
{
|
|
/* Plane A line buffer */
|
|
dst = (uint32 *)&linebuf[1][0x20 + (start << 4)];
|
|
}
|
|
|
|
for(column = start; column < end; column++, index++)
|
|
{
|
|
/* Plane A vertical scroll */
|
|
#ifdef LSB_FIRST
|
|
v_line = (line + vs[column]) & pf_row_mask;
|
|
#else
|
|
v_line = (line + (vs[column] >> 16)) & pf_row_mask;
|
|
#endif
|
|
|
|
/* Plane A name table */
|
|
nt = (uint32 *)&vram[ntab + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (v_line & 7) << 3;
|
|
|
|
atbuf = nt[index & pf_col_mask];
|
|
DRAW_COLUMN(atbuf, v_line)
|
|
}
|
|
|
|
/* Window width */
|
|
start = clip[1].left;
|
|
end = clip[1].right;
|
|
}
|
|
|
|
/* Window */
|
|
if (w)
|
|
{
|
|
/* Window name table */
|
|
nt = (uint32 *)&vram[ntwb | ((line >> 3) << (6 + (reg[12] & 1)))];
|
|
|
|
/* Pattern row index */
|
|
v_line = (line & 7) << 3;
|
|
|
|
/* Plane A line buffer */
|
|
dst = (uint32 *)&linebuf[1][0x20 + (start << 4)];
|
|
|
|
for(column = start; column < end; column++)
|
|
{
|
|
atbuf = nt[column];
|
|
DRAW_COLUMN(atbuf, v_line)
|
|
}
|
|
}
|
|
|
|
/* Merge background layers */
|
|
merge(&linebuf[1][0x20], &linebuf[0][0x20], &linebuf[0][0x20], lut[(reg[12] & 0x08) >> 2], bitmap.viewport.w);
|
|
}
|
|
|
|
void render_bg_m5_im2(int line)
|
|
{
|
|
int column;
|
|
uint32 atex, atbuf, *src, *dst;
|
|
|
|
/* Common data */
|
|
int odd = odd_frame;
|
|
uint32 xscroll = *(uint32 *)&vram[hscb + ((line & hscroll_mask) << 2)];
|
|
uint32 yscroll = *(uint32 *)&vsram[0];
|
|
uint32 pf_col_mask = playfield_col_mask;
|
|
uint32 pf_row_mask = playfield_row_mask;
|
|
uint32 pf_shift = playfield_shift;
|
|
|
|
/* Window & Plane A */
|
|
int a = (reg[18] & 0x1F) << 3;
|
|
int w = (reg[18] >> 7) & 1;
|
|
|
|
/* Plane B width */
|
|
int start = 0;
|
|
int end = bitmap.viewport.w >> 4;
|
|
|
|
/* Plane B scroll */
|
|
#ifdef LSB_FIRST
|
|
uint32 shift = (xscroll >> 16) & 0x0F;
|
|
uint32 index = pf_col_mask + 1 - ((xscroll >> 20) & pf_col_mask);
|
|
uint32 v_line = (line + (yscroll >> 17)) & pf_row_mask;
|
|
#else
|
|
uint32 shift = (xscroll & 0x0F);
|
|
uint32 index = pf_col_mask + 1 - ((xscroll >> 4) & pf_col_mask);
|
|
uint32 v_line = (line + (yscroll >> 1)) & pf_row_mask;
|
|
#endif
|
|
|
|
/* Plane B name table */
|
|
uint32 *nt = (uint32 *)&vram[ntbb + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (((v_line & 7) << 1) | odd) << 3;
|
|
|
|
if(shift)
|
|
{
|
|
/* Plane B line buffer */
|
|
dst = (uint32 *)&linebuf[0][0x10 + shift];
|
|
|
|
atbuf = nt[(index - 1) & pf_col_mask];
|
|
DRAW_COLUMN_IM2(atbuf, v_line)
|
|
}
|
|
else
|
|
{
|
|
/* Plane B line buffer */
|
|
dst = (uint32 *)&linebuf[0][0x20];
|
|
}
|
|
|
|
for(column = 0; column < end; column++, index++)
|
|
{
|
|
atbuf = nt[index & pf_col_mask];
|
|
DRAW_COLUMN_IM2(atbuf, v_line)
|
|
}
|
|
|
|
if (w == (line >= a))
|
|
{
|
|
/* Window takes up entire line */
|
|
a = 0;
|
|
w = 1;
|
|
}
|
|
else
|
|
{
|
|
/* Window and Plane A share the line */
|
|
a = clip[0].enable;
|
|
w = clip[1].enable;
|
|
}
|
|
|
|
/* Plane A */
|
|
if (a)
|
|
{
|
|
/* Plane A width */
|
|
start = clip[0].left;
|
|
end = clip[0].right;
|
|
|
|
/* Plane A scroll */
|
|
#ifdef LSB_FIRST
|
|
shift = (xscroll & 0x0F);
|
|
index = pf_col_mask + start + 1 - ((xscroll >> 4) & pf_col_mask);
|
|
v_line = (line + (yscroll >> 1)) & pf_row_mask;
|
|
#else
|
|
shift = (xscroll >> 16) & 0x0F;
|
|
index = pf_col_mask + start + 1 - ((xscroll >> 20) & pf_col_mask);
|
|
v_line = (line + (yscroll >> 17)) & pf_row_mask;
|
|
#endif
|
|
|
|
/* Plane A name table */
|
|
nt = (uint32 *)&vram[ntab + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (((v_line & 7) << 1) | odd) << 3;
|
|
|
|
if(shift)
|
|
{
|
|
/* Plane A line buffer */
|
|
dst = (uint32 *)&linebuf[1][0x10 + shift + (start << 4)];
|
|
|
|
/* Window bug */
|
|
if (start)
|
|
{
|
|
atbuf = nt[index & pf_col_mask];
|
|
}
|
|
else
|
|
{
|
|
atbuf = nt[(index - 1) & pf_col_mask];
|
|
}
|
|
|
|
DRAW_COLUMN_IM2(atbuf, v_line)
|
|
}
|
|
else
|
|
{
|
|
/* Plane A line buffer */
|
|
dst = (uint32 *)&linebuf[1][0x20 + (start << 4)];
|
|
}
|
|
|
|
for(column = start; column < end; column++, index++)
|
|
{
|
|
atbuf = nt[index & pf_col_mask];
|
|
DRAW_COLUMN_IM2(atbuf, v_line)
|
|
}
|
|
|
|
/* Window width */
|
|
start = clip[1].left;
|
|
end = clip[1].right;
|
|
}
|
|
|
|
/* Window */
|
|
if (w)
|
|
{
|
|
/* Window name table */
|
|
nt = (uint32 *)&vram[ntwb | ((line >> 3) << (6 + (reg[12] & 1)))];
|
|
|
|
/* Pattern row index */
|
|
v_line = ((line & 7) << 1 | odd) << 3;
|
|
|
|
/* Plane A line buffer */
|
|
dst = (uint32 *)&linebuf[1][0x20 + (start << 4)];
|
|
|
|
for(column = start; column < end; column++)
|
|
{
|
|
atbuf = nt[column];
|
|
DRAW_COLUMN_IM2(atbuf, v_line)
|
|
}
|
|
}
|
|
|
|
/* Merge background layers */
|
|
merge(&linebuf[1][0x20], &linebuf[0][0x20], &linebuf[0][0x20], lut[(reg[12] & 0x08) >> 2], bitmap.viewport.w);
|
|
}
|
|
|
|
void render_bg_m5_im2_vs(int line)
|
|
{
|
|
int column;
|
|
uint32 atex, atbuf, *src, *dst;
|
|
uint32 v_line, *nt;
|
|
|
|
/* Common data */
|
|
int odd = odd_frame;
|
|
uint32 xscroll = *(uint32 *)&vram[hscb + ((line & hscroll_mask) << 2)];
|
|
uint32 yscroll = 0;
|
|
uint32 pf_col_mask = playfield_col_mask;
|
|
uint32 pf_row_mask = playfield_row_mask;
|
|
uint32 pf_shift = playfield_shift;
|
|
uint32 *vs = (uint32 *)&vsram[0];
|
|
|
|
/* Window & Plane A */
|
|
int a = (reg[18] & 0x1F) << 3;
|
|
int w = (reg[18] >> 7) & 1;
|
|
|
|
/* Plane B width */
|
|
int start = 0;
|
|
int end = bitmap.viewport.w >> 4;
|
|
|
|
/* Plane B horizontal scroll */
|
|
#ifdef LSB_FIRST
|
|
uint32 shift = (xscroll >> 16) & 0x0F;
|
|
uint32 index = pf_col_mask + 1 - ((xscroll >> 20) & pf_col_mask);
|
|
#else
|
|
uint32 shift = (xscroll & 0x0F);
|
|
uint32 index = pf_col_mask + 1 - ((xscroll >> 4) & pf_col_mask);
|
|
#endif
|
|
|
|
/* Left-most column vertical scrolling when partially shown horizontally (verified on PAL MD2) */
|
|
/* TODO: check on Genesis 3 models since it apparently behaves differently */
|
|
/* In H32 mode, vertical scrolling is disabled, in H40 mode, same value is used for both planes */
|
|
/* See Formula One / Kawasaki Superbike Challenge (H32) & Gynoug / Cutie Suzuki no Ringside Angel (H40) */
|
|
if (reg[12] & 1)
|
|
{
|
|
yscroll = (vs[19] >> 1) & (vs[19] >> 17);
|
|
}
|
|
|
|
if(shift)
|
|
{
|
|
/* Plane B vertical scroll */
|
|
v_line = (line + yscroll) & pf_row_mask;
|
|
|
|
/* Plane B name table */
|
|
nt = (uint32 *)&vram[ntbb + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (((v_line & 7) << 1) | odd) << 3;
|
|
|
|
/* Plane B line buffer */
|
|
dst = (uint32 *)&linebuf[0][0x10 + shift];
|
|
|
|
atbuf = nt[(index - 1) & pf_col_mask];
|
|
DRAW_COLUMN_IM2(atbuf, v_line)
|
|
}
|
|
else
|
|
{
|
|
/* Plane B line buffer */
|
|
dst = (uint32 *)&linebuf[0][0x20];
|
|
}
|
|
|
|
for(column = 0; column < end; column++, index++)
|
|
{
|
|
/* Plane B vertical scroll */
|
|
#ifdef LSB_FIRST
|
|
v_line = (line + (vs[column] >> 17)) & pf_row_mask;
|
|
#else
|
|
v_line = (line + (vs[column] >> 1)) & pf_row_mask;
|
|
#endif
|
|
|
|
/* Plane B name table */
|
|
nt = (uint32 *)&vram[ntbb + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (((v_line & 7) << 1) | odd) << 3;
|
|
|
|
atbuf = nt[index & pf_col_mask];
|
|
DRAW_COLUMN_IM2(atbuf, v_line)
|
|
}
|
|
|
|
if (w == (line >= a))
|
|
{
|
|
/* Window takes up entire line */
|
|
a = 0;
|
|
w = 1;
|
|
}
|
|
else
|
|
{
|
|
/* Window and Plane A share the line */
|
|
a = clip[0].enable;
|
|
w = clip[1].enable;
|
|
}
|
|
|
|
/* Plane A */
|
|
if (a)
|
|
{
|
|
/* Plane A width */
|
|
start = clip[0].left;
|
|
end = clip[0].right;
|
|
|
|
/* Plane A horizontal scroll */
|
|
#ifdef LSB_FIRST
|
|
shift = (xscroll & 0x0F);
|
|
index = pf_col_mask + start + 1 - ((xscroll >> 4) & pf_col_mask);
|
|
#else
|
|
shift = (xscroll >> 16) & 0x0F;
|
|
index = pf_col_mask + start + 1 - ((xscroll >> 20) & pf_col_mask);
|
|
#endif
|
|
|
|
if(shift)
|
|
{
|
|
/* Plane A vertical scroll */
|
|
v_line = (line + yscroll) & pf_row_mask;
|
|
|
|
/* Plane A name table */
|
|
nt = (uint32 *)&vram[ntab + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (((v_line & 7) << 1) | odd) << 3;
|
|
|
|
/* Plane A line buffer */
|
|
dst = (uint32 *)&linebuf[1][0x10 + shift + (start << 4)];
|
|
|
|
/* Window bug */
|
|
if (start)
|
|
{
|
|
atbuf = nt[index & pf_col_mask];
|
|
}
|
|
else
|
|
{
|
|
atbuf = nt[(index - 1) & pf_col_mask];
|
|
}
|
|
|
|
DRAW_COLUMN_IM2(atbuf, v_line)
|
|
}
|
|
else
|
|
{
|
|
/* Plane A line buffer */
|
|
dst = (uint32 *)&linebuf[1][0x20 + (start << 4)];
|
|
}
|
|
|
|
for(column = start; column < end; column++, index++)
|
|
{
|
|
/* Plane A vertical scroll */
|
|
#ifdef LSB_FIRST
|
|
v_line = (line + (vs[column] >> 1)) & pf_row_mask;
|
|
#else
|
|
v_line = (line + (vs[column] >> 17)) & pf_row_mask;
|
|
#endif
|
|
|
|
/* Plane A name table */
|
|
nt = (uint32 *)&vram[ntab + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (((v_line & 7) << 1) | odd) << 3;
|
|
|
|
atbuf = nt[index & pf_col_mask];
|
|
DRAW_COLUMN_IM2(atbuf, v_line)
|
|
}
|
|
|
|
/* Window width */
|
|
start = clip[1].left;
|
|
end = clip[1].right;
|
|
}
|
|
|
|
/* Window */
|
|
if (w)
|
|
{
|
|
/* Window name table */
|
|
nt = (uint32 *)&vram[ntwb | ((line >> 3) << (6 + (reg[12] & 1)))];
|
|
|
|
/* Pattern row index */
|
|
v_line = ((line & 7) << 1 | odd) << 3;
|
|
|
|
/* Plane A line buffer */
|
|
dst = (uint32 *)&linebuf[1][0x20 + (start << 4)];
|
|
|
|
for(column = start; column < end; column++)
|
|
{
|
|
atbuf = nt[column];
|
|
DRAW_COLUMN_IM2(atbuf, v_line)
|
|
}
|
|
}
|
|
|
|
/* Merge background layers */
|
|
merge(&linebuf[1][0x20], &linebuf[0][0x20], &linebuf[0][0x20], lut[(reg[12] & 0x08) >> 2], bitmap.viewport.w);
|
|
}
|
|
|
|
#else
|
|
|
|
void render_bg_m5(int line)
|
|
{
|
|
int column, start, end;
|
|
uint32 atex, atbuf, *src, *dst;
|
|
uint32 shift, index, v_line, *nt;
|
|
uint8 *lb;
|
|
|
|
/* Scroll Planes common data */
|
|
uint32 xscroll = *(uint32 *)&vram[hscb + ((line & hscroll_mask) << 2)];
|
|
uint32 yscroll = *(uint32 *)&vsram[0];
|
|
uint32 pf_col_mask = playfield_col_mask;
|
|
uint32 pf_row_mask = playfield_row_mask;
|
|
uint32 pf_shift = playfield_shift;
|
|
|
|
/* Number of columns to draw */
|
|
int width = bitmap.viewport.w >> 4;
|
|
|
|
/* Layer priority table */
|
|
uint8 *table = lut[(reg[12] & 8) >> 2];
|
|
|
|
/* Window vertical range (cell 0-31) */
|
|
int a = (reg[18] & 0x1F) << 3;
|
|
|
|
/* Window position (0=top, 1=bottom) */
|
|
int w = (reg[18] >> 7) & 1;
|
|
|
|
/* Test against current line */
|
|
if (w == (line >= a))
|
|
{
|
|
/* Window takes up entire line */
|
|
a = 0;
|
|
w = 1;
|
|
}
|
|
else
|
|
{
|
|
/* Window and Plane A share the line */
|
|
a = clip[0].enable;
|
|
w = clip[1].enable;
|
|
}
|
|
|
|
/* Plane A */
|
|
if (a)
|
|
{
|
|
/* Plane A width */
|
|
start = clip[0].left;
|
|
end = clip[0].right;
|
|
|
|
/* Plane A scroll */
|
|
#ifdef LSB_FIRST
|
|
shift = (xscroll & 0x0F);
|
|
index = pf_col_mask + start + 1 - ((xscroll >> 4) & pf_col_mask);
|
|
v_line = (line + yscroll) & pf_row_mask;
|
|
#else
|
|
shift = (xscroll >> 16) & 0x0F;
|
|
index = pf_col_mask + start + 1 - ((xscroll >> 20) & pf_col_mask);
|
|
v_line = (line + (yscroll >> 16)) & pf_row_mask;
|
|
#endif
|
|
|
|
/* Background line buffer */
|
|
dst = (uint32 *)&linebuf[0][0x20 + (start << 4) + shift];
|
|
|
|
/* Plane A name table */
|
|
nt = (uint32 *)&vram[ntab + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (v_line & 7) << 3;
|
|
|
|
if(shift)
|
|
{
|
|
/* Left-most column is partially shown */
|
|
dst -= 4;
|
|
|
|
/* Window bug */
|
|
if (start)
|
|
{
|
|
atbuf = nt[index & pf_col_mask];
|
|
}
|
|
else
|
|
{
|
|
atbuf = nt[(index-1) & pf_col_mask];
|
|
}
|
|
|
|
DRAW_COLUMN(atbuf, v_line)
|
|
}
|
|
|
|
for(column = start; column < end; column++, index++)
|
|
{
|
|
atbuf = nt[index & pf_col_mask];
|
|
DRAW_COLUMN(atbuf, v_line)
|
|
}
|
|
|
|
/* Window width */
|
|
start = clip[1].left;
|
|
end = clip[1].right;
|
|
}
|
|
else
|
|
{
|
|
/* Window width */
|
|
start = 0;
|
|
end = width;
|
|
}
|
|
|
|
/* Window Plane */
|
|
if (w)
|
|
{
|
|
/* Background line buffer */
|
|
dst = (uint32 *)&linebuf[0][0x20 + (start << 4)];
|
|
|
|
/* Window name table */
|
|
nt = (uint32 *)&vram[ntwb | ((line >> 3) << (6 + (reg[12] & 1)))];
|
|
|
|
/* Pattern row index */
|
|
v_line = (line & 7) << 3;
|
|
|
|
for(column = start; column < end; column++)
|
|
{
|
|
atbuf = nt[column];
|
|
DRAW_COLUMN(atbuf, v_line)
|
|
}
|
|
}
|
|
|
|
/* Plane B scroll */
|
|
#ifdef LSB_FIRST
|
|
shift = (xscroll >> 16) & 0x0F;
|
|
index = pf_col_mask + 1 - ((xscroll >> 20) & pf_col_mask);
|
|
v_line = (line + (yscroll >> 16)) & pf_row_mask;
|
|
#else
|
|
shift = (xscroll & 0x0F);
|
|
index = pf_col_mask + 1 - ((xscroll >> 4) & pf_col_mask);
|
|
v_line = (line + yscroll) & pf_row_mask;
|
|
#endif
|
|
|
|
/* Plane B name table */
|
|
nt = (uint32 *)&vram[ntbb + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (v_line & 7) << 3;
|
|
|
|
/* Background line buffer */
|
|
lb = &linebuf[0][0x20];
|
|
|
|
if(shift)
|
|
{
|
|
/* Left-most column is partially shown */
|
|
lb -= (0x10 - shift);
|
|
|
|
atbuf = nt[(index-1) & pf_col_mask];
|
|
DRAW_BG_COLUMN(atbuf, v_line, xscroll, yscroll)
|
|
}
|
|
|
|
for(column = 0; column < width; column++, index++)
|
|
{
|
|
atbuf = nt[index & pf_col_mask];
|
|
DRAW_BG_COLUMN(atbuf, v_line, xscroll, yscroll)
|
|
}
|
|
}
|
|
|
|
void render_bg_m5_vs(int line)
|
|
{
|
|
int column, start, end;
|
|
uint32 atex, atbuf, *src, *dst;
|
|
uint32 shift, index, v_line, *nt;
|
|
uint8 *lb;
|
|
|
|
/* Scroll Planes common data */
|
|
uint32 xscroll = *(uint32 *)&vram[hscb + ((line & hscroll_mask) << 2)];
|
|
uint32 yscroll = 0;
|
|
uint32 pf_col_mask = playfield_col_mask;
|
|
uint32 pf_row_mask = playfield_row_mask;
|
|
uint32 pf_shift = playfield_shift;
|
|
uint32 *vs = (uint32 *)&vsram[0];
|
|
|
|
/* Number of columns to draw */
|
|
int width = bitmap.viewport.w >> 4;
|
|
|
|
/* Layer priority table */
|
|
uint8 *table = lut[(reg[12] & 8) >> 2];
|
|
|
|
/* Window vertical range (cell 0-31) */
|
|
int a = (reg[18] & 0x1F) << 3;
|
|
|
|
/* Window position (0=top, 1=bottom) */
|
|
int w = (reg[18] >> 7) & 1;
|
|
|
|
/* Test against current line */
|
|
if (w == (line >= a))
|
|
{
|
|
/* Window takes up entire line */
|
|
a = 0;
|
|
w = 1;
|
|
}
|
|
else
|
|
{
|
|
/* Window and Plane A share the line */
|
|
a = clip[0].enable;
|
|
w = clip[1].enable;
|
|
}
|
|
|
|
/* Left-most column vertical scrolling when partially shown horizontally */
|
|
/* Same value for both planes, only in 40-cell mode, verified on PAL MD2 */
|
|
/* See Gynoug, Cutie Suzuki no Ringside Angel, Formula One, Kawasaki Superbike Challenge */
|
|
if (reg[12] & 1)
|
|
{
|
|
yscroll = vs[19] & (vs[19] >> 16);
|
|
}
|
|
|
|
/* Plane A*/
|
|
if (a)
|
|
{
|
|
/* Plane A width */
|
|
start = clip[0].left;
|
|
end = clip[0].right;
|
|
|
|
/* Plane A horizontal scroll */
|
|
#ifdef LSB_FIRST
|
|
shift = (xscroll & 0x0F);
|
|
index = pf_col_mask + start + 1 - ((xscroll >> 4) & pf_col_mask);
|
|
#else
|
|
shift = (xscroll >> 16) & 0x0F;
|
|
index = pf_col_mask + start + 1 - ((xscroll >> 20) & pf_col_mask);
|
|
#endif
|
|
|
|
/* Background line buffer */
|
|
dst = (uint32 *)&linebuf[0][0x20 + (start << 4) + shift];
|
|
|
|
if(shift)
|
|
{
|
|
/* Left-most column is partially shown */
|
|
dst -= 4;
|
|
|
|
/* Plane A vertical scroll */
|
|
v_line = (line + yscroll) & pf_row_mask;
|
|
|
|
/* Plane A name table */
|
|
nt = (uint32 *)&vram[ntab + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (v_line & 7) << 3;
|
|
|
|
/* Window bug */
|
|
if (start)
|
|
{
|
|
atbuf = nt[index & pf_col_mask];
|
|
}
|
|
else
|
|
{
|
|
atbuf = nt[(index-1) & pf_col_mask];
|
|
}
|
|
|
|
DRAW_COLUMN(atbuf, v_line)
|
|
}
|
|
|
|
for(column = start; column < end; column++, index++)
|
|
{
|
|
/* Plane A vertical scroll */
|
|
#ifdef LSB_FIRST
|
|
v_line = (line + vs[column]) & pf_row_mask;
|
|
#else
|
|
v_line = (line + (vs[column] >> 16)) & pf_row_mask;
|
|
#endif
|
|
|
|
/* Plane A name table */
|
|
nt = (uint32 *)&vram[ntab + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (v_line & 7) << 3;
|
|
|
|
atbuf = nt[index & pf_col_mask];
|
|
DRAW_COLUMN(atbuf, v_line)
|
|
}
|
|
|
|
/* Window width */
|
|
start = clip[1].left;
|
|
end = clip[1].right;
|
|
}
|
|
else
|
|
{
|
|
/* Window width */
|
|
start = 0;
|
|
end = width;
|
|
}
|
|
|
|
/* Window Plane */
|
|
if (w)
|
|
{
|
|
/* Background line buffer */
|
|
dst = (uint32 *)&linebuf[0][0x20 + (start << 4)];
|
|
|
|
/* Window name table */
|
|
nt = (uint32 *)&vram[ntwb | ((line >> 3) << (6 + (reg[12] & 1)))];
|
|
|
|
/* Pattern row index */
|
|
v_line = (line & 7) << 3;
|
|
|
|
for(column = start; column < end; column++)
|
|
{
|
|
atbuf = nt[column];
|
|
DRAW_COLUMN(atbuf, v_line)
|
|
}
|
|
}
|
|
|
|
/* Plane B horizontal scroll */
|
|
#ifdef LSB_FIRST
|
|
shift = (xscroll >> 16) & 0x0F;
|
|
index = pf_col_mask + 1 - ((xscroll >> 20) & pf_col_mask);
|
|
#else
|
|
shift = (xscroll & 0x0F);
|
|
index = pf_col_mask + 1 - ((xscroll >> 4) & pf_col_mask);
|
|
#endif
|
|
|
|
/* Background line buffer */
|
|
lb = &linebuf[0][0x20];
|
|
|
|
if(shift)
|
|
{
|
|
/* Left-most column is partially shown */
|
|
lb -= (0x10 - shift);
|
|
|
|
/* Plane B vertical scroll */
|
|
v_line = (line + yscroll) & pf_row_mask;
|
|
|
|
/* Plane B name table */
|
|
nt = (uint32 *)&vram[ntbb + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (v_line & 7) << 3;
|
|
|
|
atbuf = nt[(index-1) & pf_col_mask];
|
|
DRAW_BG_COLUMN(atbuf, v_line, xscroll, yscroll)
|
|
}
|
|
|
|
for(column = 0; column < width; column++, index++)
|
|
{
|
|
/* Plane B vertical scroll */
|
|
#ifdef LSB_FIRST
|
|
v_line = (line + (vs[column] >> 16)) & pf_row_mask;
|
|
#else
|
|
v_line = (line + vs[column]) & pf_row_mask;
|
|
#endif
|
|
|
|
/* Plane B name table */
|
|
nt = (uint32 *)&vram[ntbb + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (v_line & 7) << 3;
|
|
|
|
atbuf = nt[index & pf_col_mask];
|
|
DRAW_BG_COLUMN(atbuf, v_line, xscroll, yscroll)
|
|
}
|
|
}
|
|
|
|
void render_bg_m5_im2(int line)
|
|
{
|
|
int column, start, end;
|
|
uint32 atex, atbuf, *src, *dst;
|
|
uint32 shift, index, v_line, *nt;
|
|
uint8 *lb;
|
|
|
|
/* Scroll Planes common data */
|
|
int odd = odd_frame;
|
|
uint32 xscroll = *(uint32 *)&vram[hscb + ((line & hscroll_mask) << 2)];
|
|
uint32 yscroll = *(uint32 *)&vsram[0];
|
|
uint32 pf_col_mask = playfield_col_mask;
|
|
uint32 pf_row_mask = playfield_row_mask;
|
|
uint32 pf_shift = playfield_shift;
|
|
|
|
/* Number of columns to draw */
|
|
int width = bitmap.viewport.w >> 4;
|
|
|
|
/* Layer priority table */
|
|
uint8 *table = lut[(reg[12] & 8) >> 2];
|
|
|
|
/* Window vertical range (cell 0-31) */
|
|
int a = (reg[18] & 0x1F) << 3;
|
|
|
|
/* Window position (0=top, 1=bottom) */
|
|
int w = (reg[18] >> 7) & 1;
|
|
|
|
/* Test against current line */
|
|
if (w == (line >= a))
|
|
{
|
|
/* Window takes up entire line */
|
|
a = 0;
|
|
w = 1;
|
|
}
|
|
else
|
|
{
|
|
/* Window and Plane A share the line */
|
|
a = clip[0].enable;
|
|
w = clip[1].enable;
|
|
}
|
|
|
|
/* Plane A */
|
|
if (a)
|
|
{
|
|
/* Plane A width */
|
|
start = clip[0].left;
|
|
end = clip[0].right;
|
|
|
|
/* Plane A scroll */
|
|
#ifdef LSB_FIRST
|
|
shift = (xscroll & 0x0F);
|
|
index = pf_col_mask + start + 1 - ((xscroll >> 4) & pf_col_mask);
|
|
v_line = (line + (yscroll >> 1)) & pf_row_mask;
|
|
#else
|
|
shift = (xscroll >> 16) & 0x0F;
|
|
index = pf_col_mask + start + 1 - ((xscroll >> 20) & pf_col_mask);
|
|
v_line = (line + (yscroll >> 17)) & pf_row_mask;
|
|
#endif
|
|
|
|
/* Background line buffer */
|
|
dst = (uint32 *)&linebuf[0][0x20 + (start << 4) + shift];
|
|
|
|
/* Plane A name table */
|
|
nt = (uint32 *)&vram[ntab + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (((v_line & 7) << 1) | odd) << 3;
|
|
|
|
if(shift)
|
|
{
|
|
/* Left-most column is partially shown */
|
|
dst -= 4;
|
|
|
|
/* Window bug */
|
|
if (start)
|
|
{
|
|
atbuf = nt[index & pf_col_mask];
|
|
}
|
|
else
|
|
{
|
|
atbuf = nt[(index-1) & pf_col_mask];
|
|
}
|
|
|
|
DRAW_COLUMN_IM2(atbuf, v_line)
|
|
}
|
|
|
|
for(column = start; column < end; column++, index++)
|
|
{
|
|
atbuf = nt[index & pf_col_mask];
|
|
DRAW_COLUMN_IM2(atbuf, v_line)
|
|
}
|
|
|
|
/* Window width */
|
|
start = clip[1].left;
|
|
end = clip[1].right;
|
|
}
|
|
else
|
|
{
|
|
/* Window width */
|
|
start = 0;
|
|
end = width;
|
|
}
|
|
|
|
/* Window Plane */
|
|
if (w)
|
|
{
|
|
/* Background line buffer */
|
|
dst = (uint32 *)&linebuf[0][0x20 + (start << 4)];
|
|
|
|
/* Window name table */
|
|
nt = (uint32 *)&vram[ntwb | ((line >> 3) << (6 + (reg[12] & 1)))];
|
|
|
|
/* Pattern row index */
|
|
v_line = ((line & 7) << 1 | odd) << 3;
|
|
|
|
for(column = start; column < end; column++)
|
|
{
|
|
atbuf = nt[column];
|
|
DRAW_COLUMN_IM2(atbuf, v_line)
|
|
}
|
|
}
|
|
|
|
/* Plane B scroll */
|
|
#ifdef LSB_FIRST
|
|
shift = (xscroll >> 16) & 0x0F;
|
|
index = pf_col_mask + 1 - ((xscroll >> 20) & pf_col_mask);
|
|
v_line = (line + (yscroll >> 17)) & pf_row_mask;
|
|
#else
|
|
shift = (xscroll & 0x0F);
|
|
index = pf_col_mask + 1 - ((xscroll >> 4) & pf_col_mask);
|
|
v_line = (line + (yscroll >> 1)) & pf_row_mask;
|
|
#endif
|
|
|
|
/* Plane B name table */
|
|
nt = (uint32 *)&vram[ntbb + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (((v_line & 7) << 1) | odd) << 3;
|
|
|
|
/* Background line buffer */
|
|
lb = &linebuf[0][0x20];
|
|
|
|
if(shift)
|
|
{
|
|
/* Left-most column is partially shown */
|
|
lb -= (0x10 - shift);
|
|
|
|
atbuf = nt[(index-1) & pf_col_mask];
|
|
DRAW_BG_COLUMN_IM2(atbuf, v_line, xscroll, yscroll)
|
|
}
|
|
|
|
for(column = 0; column < width; column++, index++)
|
|
{
|
|
atbuf = nt[index & pf_col_mask];
|
|
DRAW_BG_COLUMN_IM2(atbuf, v_line, xscroll, yscroll)
|
|
}
|
|
}
|
|
|
|
void render_bg_m5_im2_vs(int line)
|
|
{
|
|
int column, start, end;
|
|
uint32 atex, atbuf, *src, *dst;
|
|
uint32 shift, index, v_line, *nt;
|
|
uint8 *lb;
|
|
|
|
/* common data */
|
|
int odd = odd_frame;
|
|
uint32 xscroll = *(uint32 *)&vram[hscb + ((line & hscroll_mask) << 2)];
|
|
uint32 yscroll = 0;
|
|
uint32 pf_col_mask = playfield_col_mask;
|
|
uint32 pf_row_mask = playfield_row_mask;
|
|
uint32 pf_shift = playfield_shift;
|
|
uint32 *vs = (uint32 *)&vsram[0];
|
|
|
|
/* Number of columns to draw */
|
|
int width = bitmap.viewport.w >> 4;
|
|
|
|
/* Layer priority table */
|
|
uint8 *table = lut[(reg[12] & 8) >> 2];
|
|
|
|
/* Window vertical range (cell 0-31) */
|
|
uint32 a = (reg[18] & 0x1F) << 3;
|
|
|
|
/* Window position (0=top, 1=bottom) */
|
|
uint32 w = (reg[18] >> 7) & 1;
|
|
|
|
/* Test against current line */
|
|
if (w == (line >= a))
|
|
{
|
|
/* Window takes up entire line */
|
|
a = 0;
|
|
w = 1;
|
|
}
|
|
else
|
|
{
|
|
/* Window and Plane A share the line */
|
|
a = clip[0].enable;
|
|
w = clip[1].enable;
|
|
}
|
|
|
|
/* Left-most column vertical scrolling when partially shown horizontally */
|
|
/* Same value for both planes, only in 40-cell mode, verified on PAL MD2 */
|
|
/* See Gynoug, Cutie Suzuki no Ringside Angel, Formula One, Kawasaki Superbike Challenge */
|
|
if (reg[12] & 1)
|
|
{
|
|
/* only in 40-cell mode, verified on MD2 */
|
|
yscroll = (vs[19] >> 1) & (vs[19] >> 17);
|
|
}
|
|
|
|
/* Plane A */
|
|
if (a)
|
|
{
|
|
/* Plane A width */
|
|
start = clip[0].left;
|
|
end = clip[0].right;
|
|
|
|
/* Plane A horizontal scroll */
|
|
#ifdef LSB_FIRST
|
|
shift = (xscroll & 0x0F);
|
|
index = pf_col_mask + start + 1 - ((xscroll >> 4) & pf_col_mask);
|
|
#else
|
|
shift = (xscroll >> 16) & 0x0F;
|
|
index = pf_col_mask + start + 1 - ((xscroll >> 20) & pf_col_mask);
|
|
#endif
|
|
|
|
/* Background line buffer */
|
|
dst = (uint32 *)&linebuf[0][0x20 + (start << 4) + shift];
|
|
|
|
if(shift)
|
|
{
|
|
/* Left-most column is partially shown */
|
|
dst -= 4;
|
|
|
|
/* Plane A vertical scroll */
|
|
v_line = (line + yscroll) & pf_row_mask;
|
|
|
|
/* Plane A name table */
|
|
nt = (uint32 *)&vram[ntab + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (((v_line & 7) << 1) | odd) << 3;
|
|
|
|
/* Window bug */
|
|
if (start)
|
|
{
|
|
atbuf = nt[index & pf_col_mask];
|
|
}
|
|
else
|
|
{
|
|
atbuf = nt[(index-1) & pf_col_mask];
|
|
}
|
|
|
|
DRAW_COLUMN_IM2(atbuf, v_line)
|
|
}
|
|
|
|
for(column = start; column < end; column++, index++)
|
|
{
|
|
/* Plane A vertical scroll */
|
|
#ifdef LSB_FIRST
|
|
v_line = (line + (vs[column] >> 1)) & pf_row_mask;
|
|
#else
|
|
v_line = (line + (vs[column] >> 17)) & pf_row_mask;
|
|
#endif
|
|
|
|
/* Plane A name table */
|
|
nt = (uint32 *)&vram[ntab + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (((v_line & 7) << 1) | odd) << 3;
|
|
|
|
atbuf = nt[index & pf_col_mask];
|
|
DRAW_COLUMN_IM2(atbuf, v_line)
|
|
}
|
|
|
|
/* Window width */
|
|
start = clip[1].left;
|
|
end = clip[1].right;
|
|
}
|
|
else
|
|
{
|
|
/* Window width */
|
|
start = 0;
|
|
end = width;
|
|
}
|
|
|
|
/* Window Plane */
|
|
if (w)
|
|
{
|
|
/* Background line buffer */
|
|
dst = (uint32 *)&linebuf[0][0x20 + (start << 4)];
|
|
|
|
/* Window name table */
|
|
nt = (uint32 *)&vram[ntwb | ((line >> 3) << (6 + (reg[12] & 1)))];
|
|
|
|
/* Pattern row index */
|
|
v_line = ((line & 7) << 1 | odd) << 3;
|
|
|
|
for(column = start; column < end; column++)
|
|
{
|
|
atbuf = nt[column];
|
|
DRAW_COLUMN_IM2(atbuf, v_line)
|
|
}
|
|
}
|
|
|
|
/* Plane B horizontal scroll */
|
|
#ifdef LSB_FIRST
|
|
shift = (xscroll >> 16) & 0x0F;
|
|
index = pf_col_mask + 1 - ((xscroll >> 20) & pf_col_mask);
|
|
#else
|
|
shift = (xscroll & 0x0F);
|
|
index = pf_col_mask + 1 - ((xscroll >> 4) & pf_col_mask);
|
|
#endif
|
|
|
|
/* Background line buffer */
|
|
lb = &linebuf[0][0x20];
|
|
|
|
if(shift)
|
|
{
|
|
/* Left-most column is partially shown */
|
|
lb -= (0x10 - shift);
|
|
|
|
/* Plane B vertical scroll */
|
|
v_line = (line + yscroll) & pf_row_mask;
|
|
|
|
/* Plane B name table */
|
|
nt = (uint32 *)&vram[ntbb + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (((v_line & 7) << 1) | odd) << 3;
|
|
|
|
atbuf = nt[(index-1) & pf_col_mask];
|
|
DRAW_BG_COLUMN_IM2(atbuf, v_line, xscroll, yscroll)
|
|
}
|
|
|
|
for(column = 0; column < width; column++, index++)
|
|
{
|
|
/* Plane B vertical scroll */
|
|
#ifdef LSB_FIRST
|
|
v_line = (line + (vs[column] >> 17)) & pf_row_mask;
|
|
#else
|
|
v_line = (line + (vs[column] >> 1)) & pf_row_mask;
|
|
#endif
|
|
|
|
/* Plane B name table */
|
|
nt = (uint32 *)&vram[ntbb + (((v_line >> 3) << pf_shift) & 0x1FC0)];
|
|
|
|
/* Pattern row index */
|
|
v_line = (((v_line & 7) << 1) | odd) << 3;
|
|
|
|
atbuf = nt[index & pf_col_mask];
|
|
DRAW_BG_COLUMN_IM2(atbuf, v_line, xscroll, yscroll)
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* Sprite layer rendering functions */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
void render_obj_tms(int line)
|
|
{
|
|
int x, start, end;
|
|
uint8 *lb, *sg;
|
|
uint8 color, pattern[2];
|
|
uint16 temp;
|
|
|
|
/* Sprite list for current line */
|
|
object_info_t *object_info = obj_info[line];
|
|
int count = object_count[line];
|
|
|
|
/* Default sprite width (8 pixels) */
|
|
int width = 8;
|
|
|
|
/* Adjust width for 16x16 sprites */
|
|
width <<= ((reg[1] & 0x02) >> 1);
|
|
|
|
/* Adjust width for zoomed sprites */
|
|
width <<= (reg[1] & 0x01);
|
|
|
|
/* Latch SOVR flag from previous line to VDP status */
|
|
status |= spr_ovr;
|
|
|
|
/* Clear SOVR flag for current line */
|
|
spr_ovr = 0;
|
|
|
|
/* Draw sprites in front-to-back order */
|
|
while (count--)
|
|
{
|
|
/* Sprite X position */
|
|
start = object_info->xpos;
|
|
|
|
/* Sprite Color + Early Clock bit */
|
|
color = object_info->size;
|
|
|
|
/* X position shift (32 pixels) */
|
|
start -= ((color & 0x80) >> 2);
|
|
|
|
/* Pointer to line buffer */
|
|
lb = &linebuf[0][0x20 + start];
|
|
|
|
if ((start + width) > 256)
|
|
{
|
|
/* Clip sprites on right edge */
|
|
end = 256 - start;
|
|
start = 0;
|
|
}
|
|
else
|
|
{
|
|
end = width;
|
|
|
|
if (start < 0)
|
|
{
|
|
/* Clip sprites on left edge */
|
|
start = 0 - start;
|
|
}
|
|
else
|
|
{
|
|
start = 0;
|
|
}
|
|
}
|
|
|
|
/* Sprite Color (0-15) */
|
|
color &= 0x0F;
|
|
|
|
/* Sprite Pattern Name */
|
|
temp = object_info->attr;
|
|
|
|
/* Mask two LSB for 16x16 sprites */
|
|
temp &= ~((reg[1] & 0x02) >> 0);
|
|
temp &= ~((reg[1] & 0x02) >> 1);
|
|
|
|
/* Pointer to sprite generator table */
|
|
sg = (uint8 *)&vram[((reg[6] << 11) & 0x3800) | (temp << 3) | object_info->ypos];
|
|
|
|
/* Sprite Pattern data (2 x 8 pixels) */
|
|
pattern[0] = sg[0x00];
|
|
pattern[1] = sg[0x10];
|
|
|
|
if (reg[1] & 0x01)
|
|
{
|
|
/* Zoomed sprites are rendered at half speed */
|
|
for (x=start; x<end; x+=2)
|
|
{
|
|
temp = pattern[(x >> 4) & 1];
|
|
temp = (temp >> (7 - ((x >> 1) & 7))) & 0x01;
|
|
temp = temp * color;
|
|
temp |= (lb[x] << 8);
|
|
lb[x] = lut[5][temp];
|
|
status |= ((temp & 0x8000) >> 10);
|
|
temp &= 0x00FF;
|
|
temp |= (lb[x+1] << 8);
|
|
lb[x+1] = lut[5][temp];
|
|
status |= ((temp & 0x8000) >> 10);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Normal sprites */
|
|
for (x=start; x<end; x++)
|
|
{
|
|
temp = pattern[(x >> 3) & 1];
|
|
temp = (temp >> (7 - (x & 7))) & 0x01;
|
|
temp = temp * color;
|
|
temp |= (lb[x] << 8);
|
|
lb[x] = lut[5][temp];
|
|
status |= ((temp & 0x8000) >> 10);
|
|
}
|
|
}
|
|
|
|
/* Next sprite entry */
|
|
object_info++;
|
|
}
|
|
|
|
/* handle Game Gear reduced screen (160x144) */
|
|
if ((system_hw == SYSTEM_GG) && !config.gg_extra && (v_counter < bitmap.viewport.h))
|
|
{
|
|
int line = v_counter - (bitmap.viewport.h - 144) / 2;
|
|
if ((line < 0) || (line >= 144))
|
|
{
|
|
memset(&linebuf[0][0x20], 0x40, 256);
|
|
}
|
|
else
|
|
{
|
|
if (bitmap.viewport.x > 0)
|
|
{
|
|
memset(&linebuf[0][0x20], 0x40, 48);
|
|
memset(&linebuf[0][0x20+48+160], 0x40, 48);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void render_obj_m4(int line)
|
|
{
|
|
int i, xpos, end;
|
|
uint8 *src, *lb;
|
|
uint16 temp;
|
|
|
|
/* Sprite list for current line */
|
|
object_info_t *object_info = obj_info[line];
|
|
int count = object_count[line];
|
|
|
|
/* Default sprite width */
|
|
int width = 8;
|
|
|
|
/* Sprite Generator address mask (LSB is masked for 8x16 sprites) */
|
|
uint16 sg_mask = (~0x1C0 ^ (reg[6] << 6)) & (~((reg[1] & 0x02) >> 1));
|
|
|
|
/* Zoomed sprites (not working on Genesis VDP) */
|
|
if (system_hw < SYSTEM_MD)
|
|
{
|
|
width <<= (reg[1] & 0x01);
|
|
}
|
|
|
|
/* Unused bits used as a mask on 315-5124 VDP only */
|
|
if (system_hw > SYSTEM_SMS)
|
|
{
|
|
sg_mask |= 0xC0;
|
|
}
|
|
|
|
/* Latch SOVR flag from previous line to VDP status */
|
|
status |= spr_ovr;
|
|
|
|
/* Clear SOVR flag for current line */
|
|
spr_ovr = 0;
|
|
|
|
/* Draw sprites in front-to-back order */
|
|
while (count--)
|
|
{
|
|
/* Sprite pattern index */
|
|
temp = (object_info->attr | 0x100) & sg_mask;
|
|
|
|
/* Pointer to pattern cache line */
|
|
src = (uint8 *)&bg_pattern_cache[(temp << 6) | (object_info->ypos << 3)];
|
|
|
|
/* Sprite X position */
|
|
xpos = object_info->xpos;
|
|
|
|
/* X position shift */
|
|
xpos -= (reg[0] & 0x08);
|
|
|
|
if (xpos < 0)
|
|
{
|
|
/* Clip sprites on left edge */
|
|
src = src - xpos;
|
|
end = xpos + width;
|
|
xpos = 0;
|
|
}
|
|
else if ((xpos + width) > 256)
|
|
{
|
|
/* Clip sprites on right edge */
|
|
end = 256 - xpos;
|
|
}
|
|
else
|
|
{
|
|
/* Sprite maximal width */
|
|
end = width;
|
|
}
|
|
|
|
/* Pointer to line buffer */
|
|
lb = &linebuf[0][0x20 + xpos];
|
|
|
|
if (width > 8)
|
|
{
|
|
/* Draw sprite pattern (zoomed sprites are rendered at half speed) */
|
|
DRAW_SPRITE_TILE_ACCURATE_2X(end,0,lut[5])
|
|
|
|
/* 315-5124 VDP specific */
|
|
if (system_hw < SYSTEM_SMS2)
|
|
{
|
|
/* only 4 first sprites can be zoomed */
|
|
if (count == (object_count[line] - 4))
|
|
{
|
|
/* Set default width for remaining sprites */
|
|
width = 8;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Draw sprite pattern */
|
|
DRAW_SPRITE_TILE_ACCURATE(end,0,lut[5])
|
|
}
|
|
|
|
/* Next sprite entry */
|
|
object_info++;
|
|
}
|
|
|
|
/* handle Game Gear reduced screen (160x144) */
|
|
if ((system_hw == SYSTEM_GG) && !config.gg_extra && (v_counter < bitmap.viewport.h))
|
|
{
|
|
int line = v_counter - (bitmap.viewport.h - 144) / 2;
|
|
if ((line < 0) || (line >= 144))
|
|
{
|
|
memset(&linebuf[0][0x20], 0x40, 256);
|
|
}
|
|
else
|
|
{
|
|
if (bitmap.viewport.x > 0)
|
|
{
|
|
memset(&linebuf[0][0x20], 0x40, 48);
|
|
memset(&linebuf[0][0x20+48+160], 0x40, 48);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void render_obj_m5(int line)
|
|
{
|
|
int i, column;
|
|
int xpos, width;
|
|
int pixelcount = 0;
|
|
int masked = 0;
|
|
|
|
uint8 *src, *s, *lb;
|
|
uint32 temp, v_line;
|
|
uint32 attr, name, atex;
|
|
|
|
/* Sprite list for current line */
|
|
object_info_t *object_info = obj_info[line];
|
|
int count = object_count[line];
|
|
|
|
/* Draw sprites in front-to-back order */
|
|
while (count--)
|
|
{
|
|
/* Sprite X position */
|
|
xpos = object_info->xpos;
|
|
|
|
/* Sprite masking */
|
|
if (xpos)
|
|
{
|
|
/* Requires at least one sprite with xpos > 0 */
|
|
spr_ovr = 1;
|
|
}
|
|
else if (spr_ovr)
|
|
{
|
|
/* Remaining sprites are not drawn */
|
|
masked = 1;
|
|
}
|
|
|
|
/* Display area offset */
|
|
xpos = xpos - 0x80;
|
|
|
|
/* Sprite size */
|
|
temp = object_info->size;
|
|
|
|
/* Sprite width */
|
|
width = 8 + ((temp & 0x0C) << 1);
|
|
|
|
/* Update pixel count (off-screen sprites are included) */
|
|
pixelcount += width;
|
|
|
|
/* Is sprite across visible area ? */
|
|
if (((xpos + width) > 0) && (xpos < bitmap.viewport.w) && !masked)
|
|
{
|
|
/* Sprite attributes */
|
|
attr = object_info->attr;
|
|
|
|
/* Sprite vertical offset */
|
|
v_line = object_info->ypos;
|
|
|
|
/* Sprite priority + palette bits */
|
|
atex = (attr >> 9) & 0x70;
|
|
|
|
/* Pattern name base */
|
|
name = attr & 0x07FF;
|
|
|
|
/* Mask vflip/hflip */
|
|
attr &= 0x1800;
|
|
|
|
/* Pointer into pattern name offset look-up table */
|
|
s = &name_lut[((attr >> 3) & 0x300) | (temp << 4) | ((v_line & 0x18) >> 1)];
|
|
|
|
/* Pointer into line buffer */
|
|
lb = &linebuf[0][0x20 + xpos];
|
|
|
|
/* Max. number of sprite pixels rendered per line */
|
|
if (pixelcount > max_sprite_pixels)
|
|
{
|
|
/* Adjust number of pixels to draw */
|
|
width -= (pixelcount - max_sprite_pixels);
|
|
}
|
|
|
|
/* Number of tiles to draw */
|
|
width = width >> 3;
|
|
|
|
/* Pattern row index */
|
|
v_line = (v_line & 7) << 3;
|
|
|
|
/* Draw sprite patterns */
|
|
for (column = 0; column < width; column++, lb+=8)
|
|
{
|
|
temp = attr | ((name + s[column]) & 0x07FF);
|
|
src = &bg_pattern_cache[(temp << 6) | (v_line)];
|
|
DRAW_SPRITE_TILE(8,atex,lut[1])
|
|
}
|
|
}
|
|
|
|
/* Sprite limit */
|
|
if (pixelcount >= max_sprite_pixels)
|
|
{
|
|
/* Sprite masking is effective on next line if max pixel width is reached */
|
|
spr_ovr = (pixelcount >= bitmap.viewport.w);
|
|
|
|
/* Stop sprite rendering */
|
|
return;
|
|
}
|
|
|
|
/* Next sprite entry */
|
|
object_info++;
|
|
}
|
|
|
|
/* Clear sprite masking for next line */
|
|
spr_ovr = 0;
|
|
}
|
|
|
|
void render_obj_m5_ste(int line)
|
|
{
|
|
int i, column;
|
|
int xpos, width;
|
|
int pixelcount = 0;
|
|
int masked = 0;
|
|
|
|
uint8 *src, *s, *lb;
|
|
uint32 temp, v_line;
|
|
uint32 attr, name, atex;
|
|
|
|
/* Sprite list for current line */
|
|
object_info_t *object_info = obj_info[line];
|
|
int count = object_count[line];
|
|
|
|
/* Clear sprite line buffer */
|
|
memset(&linebuf[1][0], 0, bitmap.viewport.w + 0x40);
|
|
|
|
/* Draw sprites in front-to-back order */
|
|
while (count--)
|
|
{
|
|
/* Sprite X position */
|
|
xpos = object_info->xpos;
|
|
|
|
/* Sprite masking */
|
|
if (xpos)
|
|
{
|
|
/* Requires at least one sprite with xpos > 0 */
|
|
spr_ovr = 1;
|
|
}
|
|
else if (spr_ovr)
|
|
{
|
|
/* Remaining sprites are not drawn */
|
|
masked = 1;
|
|
}
|
|
|
|
/* Display area offset */
|
|
xpos = xpos - 0x80;
|
|
|
|
/* Sprite size */
|
|
temp = object_info->size;
|
|
|
|
/* Sprite width */
|
|
width = 8 + ((temp & 0x0C) << 1);
|
|
|
|
/* Update pixel count (off-screen sprites are included) */
|
|
pixelcount += width;
|
|
|
|
/* Is sprite across visible area ? */
|
|
if (((xpos + width) > 0) && (xpos < bitmap.viewport.w) && !masked)
|
|
{
|
|
/* Sprite attributes */
|
|
attr = object_info->attr;
|
|
|
|
/* Sprite vertical offset */
|
|
v_line = object_info->ypos;
|
|
|
|
/* Sprite priority + palette bits */
|
|
atex = (attr >> 9) & 0x70;
|
|
|
|
/* Pattern name base */
|
|
name = attr & 0x07FF;
|
|
|
|
/* Mask vflip/hflip */
|
|
attr &= 0x1800;
|
|
|
|
/* Pointer into pattern name offset look-up table */
|
|
s = &name_lut[((attr >> 3) & 0x300) | (temp << 4) | ((v_line & 0x18) >> 1)];
|
|
|
|
/* Pointer into line buffer */
|
|
lb = &linebuf[1][0x20 + xpos];
|
|
|
|
/* Adjust number of pixels to draw for sprite limit */
|
|
if (pixelcount > max_sprite_pixels)
|
|
{
|
|
width -= (pixelcount - max_sprite_pixels);
|
|
}
|
|
|
|
/* Number of tiles to draw */
|
|
width = width >> 3;
|
|
|
|
/* Pattern row index */
|
|
v_line = (v_line & 7) << 3;
|
|
|
|
/* Draw sprite patterns */
|
|
for (column = 0; column < width; column++, lb+=8)
|
|
{
|
|
temp = attr | ((name + s[column]) & 0x07FF);
|
|
src = &bg_pattern_cache[(temp << 6) | (v_line)];
|
|
DRAW_SPRITE_TILE(8,atex,lut[3])
|
|
}
|
|
}
|
|
|
|
/* Sprite limit */
|
|
if (pixelcount >= max_sprite_pixels)
|
|
{
|
|
/* Sprite masking is effective on next line if max pixel width is reached */
|
|
spr_ovr = (pixelcount >= bitmap.viewport.w);
|
|
|
|
/* Merge background & sprite layers */
|
|
merge(&linebuf[1][0x20], &linebuf[0][0x20], &linebuf[0][0x20], lut[4], bitmap.viewport.w);
|
|
|
|
/* Stop sprite rendering */
|
|
return;
|
|
}
|
|
|
|
/* Next sprite entry */
|
|
object_info++;
|
|
}
|
|
|
|
/* Clear sprite masking for next line */
|
|
spr_ovr = 0;
|
|
|
|
/* Merge background & sprite layers */
|
|
merge(&linebuf[1][0x20], &linebuf[0][0x20], &linebuf[0][0x20], lut[4], bitmap.viewport.w);
|
|
}
|
|
|
|
void render_obj_m5_im2(int line)
|
|
{
|
|
int i, column;
|
|
int xpos, width;
|
|
int pixelcount = 0;
|
|
int masked = 0;
|
|
int odd = odd_frame;
|
|
|
|
uint8 *src, *s, *lb;
|
|
uint32 temp, v_line;
|
|
uint32 attr, name, atex;
|
|
|
|
/* Sprite list for current line */
|
|
object_info_t *object_info = obj_info[line];
|
|
int count = object_count[line];
|
|
|
|
/* Draw sprites in front-to-back order */
|
|
while (count--)
|
|
{
|
|
/* Sprite X position */
|
|
xpos = object_info->xpos;
|
|
|
|
/* Sprite masking */
|
|
if (xpos)
|
|
{
|
|
/* Requires at least one sprite with xpos > 0 */
|
|
spr_ovr = 1;
|
|
}
|
|
else if (spr_ovr)
|
|
{
|
|
/* Remaining sprites are not drawn */
|
|
masked = 1;
|
|
}
|
|
|
|
/* Display area offset */
|
|
xpos = xpos - 0x80;
|
|
|
|
/* Sprite size */
|
|
temp = object_info->size;
|
|
|
|
/* Sprite width */
|
|
width = 8 + ((temp & 0x0C) << 1);
|
|
|
|
/* Update pixel count (off-screen sprites are included) */
|
|
pixelcount += width;
|
|
|
|
/* Is sprite across visible area ? */
|
|
if (((xpos + width) > 0) && (xpos < bitmap.viewport.w) && !masked)
|
|
{
|
|
/* Sprite attributes */
|
|
attr = object_info->attr;
|
|
|
|
/* Sprite y offset */
|
|
v_line = object_info->ypos;
|
|
|
|
/* Sprite priority + palette bits */
|
|
atex = (attr >> 9) & 0x70;
|
|
|
|
/* Pattern name base */
|
|
name = attr & 0x03FF;
|
|
|
|
/* Mask vflip/hflip */
|
|
attr &= 0x1800;
|
|
|
|
/* Pattern name offset lookup table */
|
|
s = &name_lut[((attr >> 3) & 0x300) | (temp << 4) | ((v_line & 0x18) >> 1)];
|
|
|
|
/* Pointer into line buffer */
|
|
lb = &linebuf[0][0x20 + xpos];
|
|
|
|
/* Adjust width for sprite limit */
|
|
if (pixelcount > max_sprite_pixels)
|
|
{
|
|
width -= (pixelcount - max_sprite_pixels);
|
|
}
|
|
|
|
/* Number of tiles to draw */
|
|
width = width >> 3;
|
|
|
|
/* Pattern row index */
|
|
v_line = (((v_line & 7) << 1) | odd) << 3;
|
|
|
|
/* Render sprite patterns */
|
|
for(column = 0; column < width; column ++, lb+=8)
|
|
{
|
|
temp = attr | (((name + s[column]) & 0x3ff) << 1);
|
|
src = &bg_pattern_cache[((temp << 6) | (v_line)) ^ ((attr & 0x1000) >> 6)];
|
|
DRAW_SPRITE_TILE(8,atex,lut[1])
|
|
}
|
|
}
|
|
|
|
/* Sprite Limit */
|
|
if (pixelcount >= max_sprite_pixels)
|
|
{
|
|
/* Sprite masking is effective on next line if max pixel width is reached */
|
|
spr_ovr = (pixelcount >= bitmap.viewport.w);
|
|
|
|
/* Stop sprite rendering */
|
|
return;
|
|
}
|
|
|
|
/* Next sprite entry */
|
|
object_info++;
|
|
}
|
|
|
|
/* Clear sprite masking for next line */
|
|
spr_ovr = 0;
|
|
}
|
|
|
|
void render_obj_m5_im2_ste(int line)
|
|
{
|
|
int i, column;
|
|
int xpos, width;
|
|
int pixelcount = 0;
|
|
int masked = 0;
|
|
int odd = odd_frame;
|
|
|
|
uint8 *src, *s, *lb;
|
|
uint32 temp, v_line;
|
|
uint32 attr, name, atex;
|
|
|
|
/* Sprite list for current line */
|
|
object_info_t *object_info = obj_info[line];
|
|
int count = object_count[line];
|
|
|
|
/* Clear sprite line buffer */
|
|
memset(&linebuf[1][0], 0, bitmap.viewport.w + 0x40);
|
|
|
|
/* Draw sprites in front-to-back order */
|
|
while (count--)
|
|
{
|
|
/* Sprite X position */
|
|
xpos = object_info->xpos;
|
|
|
|
/* Sprite masking */
|
|
if (xpos)
|
|
{
|
|
/* Requires at least one sprite with xpos > 0 */
|
|
spr_ovr = 1;
|
|
}
|
|
else if (spr_ovr)
|
|
{
|
|
/* Remaining sprites are not drawn */
|
|
masked = 1;
|
|
}
|
|
|
|
/* Display area offset */
|
|
xpos = xpos - 0x80;
|
|
|
|
/* Sprite size */
|
|
temp = object_info->size;
|
|
|
|
/* Sprite width */
|
|
width = 8 + ((temp & 0x0C) << 1);
|
|
|
|
/* Update pixel count (off-screen sprites are included) */
|
|
pixelcount += width;
|
|
|
|
/* Is sprite across visible area ? */
|
|
if (((xpos + width) > 0) && (xpos < bitmap.viewport.w) && !masked)
|
|
{
|
|
/* Sprite attributes */
|
|
attr = object_info->attr;
|
|
|
|
/* Sprite y offset */
|
|
v_line = object_info->ypos;
|
|
|
|
/* Sprite priority + palette bits */
|
|
atex = (attr >> 9) & 0x70;
|
|
|
|
/* Pattern name base */
|
|
name = attr & 0x03FF;
|
|
|
|
/* Mask vflip/hflip */
|
|
attr &= 0x1800;
|
|
|
|
/* Pattern name offset lookup table */
|
|
s = &name_lut[((attr >> 3) & 0x300) | (temp << 4) | ((v_line & 0x18) >> 1)];
|
|
|
|
/* Pointer into line buffer */
|
|
lb = &linebuf[1][0x20 + xpos];
|
|
|
|
/* Adjust width for sprite limit */
|
|
if (pixelcount > max_sprite_pixels)
|
|
{
|
|
width -= (pixelcount - max_sprite_pixels);
|
|
}
|
|
|
|
/* Number of tiles to draw */
|
|
width = width >> 3;
|
|
|
|
/* Pattern row index */
|
|
v_line = (((v_line & 7) << 1) | odd) << 3;
|
|
|
|
/* Render sprite patterns */
|
|
for(column = 0; column < width; column ++, lb+=8)
|
|
{
|
|
temp = attr | (((name + s[column]) & 0x3ff) << 1);
|
|
src = &bg_pattern_cache[((temp << 6) | (v_line)) ^ ((attr & 0x1000) >> 6)];
|
|
DRAW_SPRITE_TILE(8,atex,lut[3])
|
|
}
|
|
}
|
|
|
|
/* Sprite Limit */
|
|
if (pixelcount >= max_sprite_pixels)
|
|
{
|
|
/* Sprite masking is effective on next line if max pixel width is reached */
|
|
spr_ovr = (pixelcount >= bitmap.viewport.w);
|
|
|
|
/* Merge background & sprite layers */
|
|
merge(&linebuf[1][0x20], &linebuf[0][0x20], &linebuf[0][0x20], lut[4], bitmap.viewport.w);
|
|
|
|
/* Stop sprite rendering */
|
|
return;
|
|
}
|
|
|
|
/* Next sprite entry */
|
|
object_info++;
|
|
}
|
|
|
|
/* Clear sprite masking for next line */
|
|
spr_ovr = 0;
|
|
|
|
/* Merge background & sprite layers */
|
|
merge(&linebuf[1][0x20], &linebuf[0][0x20], &linebuf[0][0x20], lut[4], bitmap.viewport.w);
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* Sprites Parsing functions */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
void parse_satb_tms(int line)
|
|
{
|
|
int i = 0;
|
|
|
|
/* Sprite counter (4 max. per line) */
|
|
int count = 0;
|
|
|
|
/* no sprites in Text modes */
|
|
if (!(reg[1] & 0x10))
|
|
{
|
|
/* Y position */
|
|
int ypos;
|
|
|
|
/* Sprite list for next line */
|
|
object_info_t *object_info = obj_info[(line + 1) & 1];
|
|
|
|
/* Pointer to sprite attribute table */
|
|
uint8 *st = &vram[(reg[5] << 7) & 0x3F80];
|
|
|
|
/* Sprite height (8 pixels by default) */
|
|
int height = 8;
|
|
|
|
/* Adjust height for 16x16 sprites */
|
|
height <<= ((reg[1] & 0x02) >> 1);
|
|
|
|
/* Adjust height for zoomed sprites */
|
|
height <<= (reg[1] & 0x01);
|
|
|
|
/* Parse Sprite Table (32 entries) */
|
|
do
|
|
{
|
|
/* Sprite Y position */
|
|
ypos = st[i << 2];
|
|
|
|
/* Check end of sprite list marker */
|
|
if (ypos == 0xD0)
|
|
{
|
|
break;
|
|
}
|
|
|
|
/* Wrap Y coordinate for sprites > 256-32 */
|
|
if (ypos >= 224)
|
|
{
|
|
ypos -= 256;
|
|
}
|
|
|
|
/* Y range */
|
|
ypos = line - ypos;
|
|
|
|
/* Sprite is visible on this line ? */
|
|
if ((ypos >= 0) && (ypos < height))
|
|
{
|
|
/* Sprite overflow */
|
|
if (count == 4)
|
|
{
|
|
/* Flag is set only during active area */
|
|
if (line < bitmap.viewport.h)
|
|
{
|
|
spr_ovr = 0x40;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* Adjust Y range back for zoomed sprites */
|
|
ypos >>= (reg[1] & 0x01);
|
|
|
|
/* Store sprite attributes for later processing */
|
|
object_info->ypos = ypos;
|
|
object_info->xpos = st[(i << 2) + 1];
|
|
object_info->attr = st[(i << 2) + 2];
|
|
object_info->size = st[(i << 2) + 3];
|
|
|
|
/* Increment Sprite count */
|
|
++count;
|
|
|
|
/* Next sprite entry */
|
|
object_info++;
|
|
}
|
|
}
|
|
while (++i < 32);
|
|
}
|
|
|
|
/* Update sprite count for next line */
|
|
object_count[(line + 1) & 1] = count;
|
|
|
|
/* Insert number of last sprite entry processed */
|
|
status = (status & 0xE0) | (i & 0x1F);
|
|
}
|
|
|
|
void parse_satb_m4(int line)
|
|
{
|
|
int i = 0;
|
|
uint8 *st;
|
|
|
|
/* Sprite counter (8 max. per line) */
|
|
int count = 0;
|
|
|
|
/* Y position */
|
|
int ypos;
|
|
|
|
/* Sprite list for next line */
|
|
object_info_t *object_info = obj_info[(line + 1) & 1];
|
|
|
|
/* Sprite height (8x8 or 8x16) */
|
|
int height = 8 + ((reg[1] & 0x02) << 2);
|
|
|
|
/* Sprite attribute table address mask */
|
|
uint16 st_mask = ~0x3F80 ^ (reg[5] << 7);
|
|
|
|
/* Unused bits used as a mask on 315-5124 VDP only */
|
|
if (system_hw > SYSTEM_SMS)
|
|
{
|
|
st_mask |= 0x80;
|
|
}
|
|
|
|
/* Pointer to sprite attribute table */
|
|
st = &vram[st_mask & 0x3F00];
|
|
|
|
/* Parse Sprite Table (64 entries) */
|
|
do
|
|
{
|
|
/* Sprite Y position */
|
|
ypos = st[i];
|
|
|
|
/* Check end of sprite list marker */
|
|
if (ypos == (bitmap.viewport.h + 16))
|
|
{
|
|
break;
|
|
}
|
|
|
|
/* Wrap Y coordinate for sprites > 256-16 */
|
|
if (ypos >= 240)
|
|
{
|
|
ypos -= 256;
|
|
}
|
|
|
|
/* Y range */
|
|
ypos = line - ypos;
|
|
|
|
/* Adjust Y range for zoomed sprites (not working on Mega Drive VDP) */
|
|
if (system_hw < SYSTEM_MD)
|
|
{
|
|
ypos >>= (reg[1] & 0x01);
|
|
}
|
|
|
|
/* Check if sprite is visible on this line */
|
|
if ((ypos >= 0) && (ypos < height))
|
|
{
|
|
/* Sprite overflow */
|
|
if (count == 8)
|
|
{
|
|
/* Flag is set only during active area */
|
|
if ((line >= 0) && (line < bitmap.viewport.h))
|
|
{
|
|
spr_ovr = 0x40;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* Store sprite attributes for later processing */
|
|
object_info->ypos = ypos;
|
|
object_info->xpos = st[(0x80 + (i << 1)) & st_mask];
|
|
object_info->attr = st[(0x81 + (i << 1)) & st_mask];
|
|
|
|
/* Increment Sprite count */
|
|
++count;
|
|
|
|
/* Next sprite entry */
|
|
object_info++;
|
|
}
|
|
}
|
|
while (++i < 64);
|
|
|
|
/* Update sprite count for next line */
|
|
object_count[(line + 1) & 1] = count;
|
|
}
|
|
|
|
void parse_satb_m5(int line)
|
|
{
|
|
/* Y position */
|
|
int ypos;
|
|
|
|
/* Sprite height (8,16,24,32 pixels)*/
|
|
int height;
|
|
|
|
/* Sprite size data */
|
|
int size;
|
|
|
|
/* Sprite link data */
|
|
int link = 0;
|
|
|
|
/* Sprite counter */
|
|
int count = 0;
|
|
|
|
/* max. number of rendered sprites (16 or 20 sprites per line by default) */
|
|
int max = bitmap.viewport.w >> 4;
|
|
|
|
/* max. number of parsed sprites (64 or 80 sprites per line by default) */
|
|
int total = max_sprite_pixels >> 2;
|
|
|
|
/* Pointer to sprite attribute table */
|
|
uint16 *p = (uint16 *) &vram[satb];
|
|
|
|
/* Pointer to internal RAM */
|
|
uint16 *q = (uint16 *) &sat[0];
|
|
|
|
/* Sprite list for next line */
|
|
object_info_t *object_info = obj_info[(line + 1) & 1];
|
|
|
|
/* Adjust line offset */
|
|
line += 0x81;
|
|
|
|
do
|
|
{
|
|
/* Read Y position & size from internal SAT */
|
|
ypos = (q[link] >> im2_flag) & 0x1FF;
|
|
size = q[link + 1] >> 8;
|
|
|
|
/* Sprite height */
|
|
height = 8 + ((size & 3) << 3);
|
|
|
|
/* Y range */
|
|
ypos = line - ypos;
|
|
|
|
/* Sprite is visble on this line ? */
|
|
if ((ypos >= 0) && (ypos < height))
|
|
{
|
|
/* Sprite overflow */
|
|
if (count == max)
|
|
{
|
|
status |= 0x40;
|
|
break;
|
|
}
|
|
|
|
/* Update sprite list (only name, attribute & xpos are parsed from VRAM) */
|
|
object_info->attr = p[link + 2];
|
|
object_info->xpos = p[link + 3] & 0x1ff;
|
|
object_info->ypos = ypos;
|
|
object_info->size = size & 0x0f;
|
|
|
|
/* Increment Sprite count */
|
|
++count;
|
|
|
|
/* Next sprite entry */
|
|
object_info++;
|
|
}
|
|
|
|
/* Read link data from internal SAT */
|
|
link = (q[link + 1] & 0x7F) << 2;
|
|
|
|
/* Last sprite */
|
|
if (link == 0) break;
|
|
}
|
|
while (--total);
|
|
|
|
/* Update sprite count for next line (line value already incremented) */
|
|
object_count[line & 1] = count;
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* Pattern cache update function */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
void update_bg_pattern_cache_m4(int index)
|
|
{
|
|
int i;
|
|
uint8 x, y, c;
|
|
uint8 *dst;
|
|
uint16 name, bp01, bp23;
|
|
uint32 bp;
|
|
|
|
for(i = 0; i < index; i++)
|
|
{
|
|
/* Get modified pattern name index */
|
|
name = bg_name_list[i];
|
|
|
|
/* Check modified lines */
|
|
for(y = 0; y < 8; y++)
|
|
{
|
|
if(bg_name_dirty[name] & (1 << y))
|
|
{
|
|
/* Pattern cache base address */
|
|
dst = &bg_pattern_cache[name << 6];
|
|
|
|
/* Byteplane data */
|
|
bp01 = *(uint16 *)&vram[(name << 5) | (y << 2) | (0)];
|
|
bp23 = *(uint16 *)&vram[(name << 5) | (y << 2) | (2)];
|
|
|
|
/* Convert to pixel line data (4 bytes = 8 pixels)*/
|
|
/* (msb) p7p6 p5p4 p3p2 p1p0 (lsb) */
|
|
bp = (bp_lut[bp01] >> 2) | (bp_lut[bp23]);
|
|
|
|
/* Update cached line (8 pixels = 8 bytes) */
|
|
for(x = 0; x < 8; x++)
|
|
{
|
|
/* Extract pixel data */
|
|
c = bp & 0x0F;
|
|
|
|
/* Pattern cache data (one pattern = 8 bytes) */
|
|
/* byte0 <-> p0 p1 p2 p3 p4 p5 p6 p7 <-> byte7 (hflip = 0) */
|
|
/* byte0 <-> p7 p6 p5 p4 p3 p2 p1 p0 <-> byte7 (hflip = 1) */
|
|
dst[0x00000 | (y << 3) | (x)] = (c); /* vflip=0 & hflip=0 */
|
|
dst[0x08000 | (y << 3) | (x ^ 7)] = (c); /* vflip=0 & hflip=1 */
|
|
dst[0x10000 | ((y ^ 7) << 3) | (x)] = (c); /* vflip=1 & hflip=0 */
|
|
dst[0x18000 | ((y ^ 7) << 3) | (x ^ 7)] = (c); /* vflip=1 & hflip=1 */
|
|
|
|
/* Next pixel */
|
|
bp = bp >> 4;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Clear modified pattern flag */
|
|
bg_name_dirty[name] = 0;
|
|
}
|
|
}
|
|
|
|
void update_bg_pattern_cache_m5(int index)
|
|
{
|
|
int i;
|
|
uint8 x, y, c;
|
|
uint8 *dst;
|
|
uint16 name;
|
|
uint32 bp;
|
|
|
|
for(i = 0; i < index; i++)
|
|
{
|
|
/* Get modified pattern name index */
|
|
name = bg_name_list[i];
|
|
|
|
/* Check modified lines */
|
|
for(y = 0; y < 8; y ++)
|
|
{
|
|
if(bg_name_dirty[name] & (1 << y))
|
|
{
|
|
/* Pattern cache base address */
|
|
dst = &bg_pattern_cache[name << 6];
|
|
|
|
/* Byteplane data (one pattern = 4 bytes) */
|
|
/* LIT_ENDIAN: byte0 (lsb) p2p3 p0p1 p6p7 p4p5 (msb) byte3 */
|
|
/* BIG_ENDIAN: byte0 (msb) p0p1 p2p3 p4p5 p6p7 (lsb) byte3 */
|
|
bp = *(uint32 *)&vram[(name << 5) | (y << 2)];
|
|
|
|
/* Update cached line (8 pixels = 8 bytes) */
|
|
for(x = 0; x < 8; x ++)
|
|
{
|
|
/* Extract pixel data */
|
|
c = bp & 0x0F;
|
|
|
|
/* Pattern cache data (one pattern = 8 bytes) */
|
|
/* byte0 <-> p0 p1 p2 p3 p4 p5 p6 p7 <-> byte7 (hflip = 0) */
|
|
/* byte0 <-> p7 p6 p5 p4 p3 p2 p1 p0 <-> byte7 (hflip = 1) */
|
|
#ifdef LSB_FIRST
|
|
/* Byteplane data = (msb) p4p5 p6p7 p0p1 p2p3 (lsb) */
|
|
dst[0x00000 | (y << 3) | (x ^ 3)] = (c); /* vflip=0, hflip=0 */
|
|
dst[0x20000 | (y << 3) | (x ^ 4)] = (c); /* vflip=0, hflip=1 */
|
|
dst[0x40000 | ((y ^ 7) << 3) | (x ^ 3)] = (c); /* vflip=1, hflip=0 */
|
|
dst[0x60000 | ((y ^ 7) << 3) | (x ^ 4)] = (c); /* vflip=1, hflip=1 */
|
|
#else
|
|
/* Byteplane data = (msb) p0p1 p2p3 p4p5 p6p7 (lsb) */
|
|
dst[0x00000 | (y << 3) | (x ^ 7)] = (c); /* vflip=0, hflip=0 */
|
|
dst[0x20000 | (y << 3) | (x)] = (c); /* vflip=0, hflip=1 */
|
|
dst[0x40000 | ((y ^ 7) << 3) | (x ^ 7)] = (c); /* vflip=1, hflip=0 */
|
|
dst[0x60000 | ((y ^ 7) << 3) | (x)] = (c); /* vflip=1, hflip=1 */
|
|
#endif
|
|
/* Next pixel */
|
|
bp = bp >> 4;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Clear modified pattern flag */
|
|
bg_name_dirty[name] = 0;
|
|
}
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* Window & Plane A clipping update function (Mode 5) */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
void window_clip(unsigned int data, unsigned int sw)
|
|
{
|
|
/* Window size and invert flags */
|
|
int hp = (data & 0x1f);
|
|
int hf = (data >> 7) & 1;
|
|
|
|
/* Perform horizontal clipping; the results are applied in reverse
|
|
if the horizontal inversion flag is set
|
|
*/
|
|
int a = hf;
|
|
int w = hf ^ 1;
|
|
|
|
/* Display width (16 or 20 columns) */
|
|
sw = 16 + (sw << 2);
|
|
|
|
if(hp)
|
|
{
|
|
if(hp > sw)
|
|
{
|
|
/* Plane W takes up entire line */
|
|
clip[w].left = 0;
|
|
clip[w].right = sw;
|
|
clip[w].enable = 1;
|
|
clip[a].enable = 0;
|
|
}
|
|
else
|
|
{
|
|
/* Plane W takes left side, Plane A takes right side */
|
|
clip[w].left = 0;
|
|
clip[a].right = sw;
|
|
clip[a].left = clip[w].right = hp;
|
|
clip[0].enable = clip[1].enable = 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Plane A takes up entire line */
|
|
clip[a].left = 0;
|
|
clip[a].right = sw;
|
|
clip[a].enable = 1;
|
|
clip[w].enable = 0;
|
|
}
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* Init, reset routines */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
void render_init(void)
|
|
{
|
|
int bx, ax;
|
|
|
|
/* Initialize layers priority pixel look-up tables */
|
|
uint16 index;
|
|
for (bx = 0; bx < 0x100; bx++)
|
|
{
|
|
for (ax = 0; ax < 0x100; ax++)
|
|
{
|
|
index = (bx << 8) | (ax);
|
|
|
|
lut[0][index] = make_lut_bg(bx, ax);
|
|
lut[1][index] = make_lut_bgobj(bx, ax);
|
|
lut[2][index] = make_lut_bg_ste(bx, ax);
|
|
lut[3][index] = make_lut_obj(bx, ax);
|
|
lut[4][index] = make_lut_bgobj_ste(bx, ax);
|
|
lut[5][index] = make_lut_bgobj_m4(bx,ax);
|
|
}
|
|
}
|
|
|
|
/* Initialize pixel color look-up tables */
|
|
palette_init();
|
|
|
|
/* Make sprite pattern name index look-up table (Mode 5) */
|
|
make_name_lut();
|
|
|
|
/* Make bitplane to pixel look-up table (Mode 4) */
|
|
make_bp_lut();
|
|
}
|
|
|
|
void render_reset(void)
|
|
{
|
|
/* Clear display bitmap */
|
|
memset(bitmap.data, 0, bitmap.pitch * bitmap.height);
|
|
|
|
/* Clear line buffers */
|
|
memset(linebuf, 0, sizeof(linebuf));
|
|
|
|
/* Clear color palettes */
|
|
memset(pixel, 0, sizeof(pixel));
|
|
|
|
/* Clear pattern cache */
|
|
memset ((char *) bg_pattern_cache, 0, sizeof (bg_pattern_cache));
|
|
|
|
/* Reset Sprite infos */
|
|
spr_ovr = spr_col = object_count[0] = object_count[1] = 0;
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* Line rendering functions */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
void render_line(int line)
|
|
{
|
|
/* Check display status */
|
|
if (reg[1] & 0x40)
|
|
{
|
|
/* Update pattern cache */
|
|
if (bg_list_index)
|
|
{
|
|
update_bg_pattern_cache(bg_list_index);
|
|
bg_list_index = 0;
|
|
}
|
|
|
|
/* Render BG layer(s) */
|
|
render_bg(line);
|
|
|
|
/* Render sprite layer */
|
|
render_obj(line & 1);
|
|
|
|
/* Left-most column blanking */
|
|
if (reg[0] & 0x20)
|
|
{
|
|
if (system_hw > SYSTEM_SG)
|
|
{
|
|
memset(&linebuf[0][0x20], 0x40, 8);
|
|
}
|
|
}
|
|
|
|
/* Parse sprites for next line */
|
|
if (line < (bitmap.viewport.h - 1))
|
|
{
|
|
parse_satb(line);
|
|
}
|
|
|
|
/* Horizontal borders */
|
|
memset(&linebuf[0][0x20 - bitmap.viewport.x], 0x40, bitmap.viewport.x);
|
|
memset(&linebuf[0][0x20 + bitmap.viewport.w], 0x40, bitmap.viewport.x);
|
|
}
|
|
else
|
|
{
|
|
/* Master System & Game Gear VDP specific */
|
|
if (system_hw < SYSTEM_MD)
|
|
{
|
|
/* Update SOVR flag */
|
|
status |= spr_ovr;
|
|
spr_ovr = 0;
|
|
|
|
/* Sprites are still parsed when display is disabled */
|
|
parse_satb(line);
|
|
}
|
|
|
|
/* Blanked line */
|
|
memset(&linebuf[0][0x20 - bitmap.viewport.x], 0x40, bitmap.viewport.w + 2*bitmap.viewport.x);
|
|
}
|
|
|
|
/* Pixel color remapping */
|
|
remap_line(line);
|
|
}
|
|
|
|
void blank_line(int line, int offset, int width)
|
|
{
|
|
memset(&linebuf[0][0x20 + offset], 0x40, width);
|
|
remap_line(line);
|
|
}
|
|
|
|
void remap_line(int line)
|
|
{
|
|
/* Line width */
|
|
int width = bitmap.viewport.w + 2*bitmap.viewport.x;
|
|
|
|
/* Pixel line buffer */
|
|
uint8 *src = &linebuf[0][0x20 - bitmap.viewport.x];
|
|
|
|
/* Adjust line offset in framebuffer */
|
|
line = (line + bitmap.viewport.y) % lines_per_frame;
|
|
|
|
/* Take care of Game Gear reduced screen when overscan is disabled */
|
|
if (line < 0) return;
|
|
|
|
/* Adjust for interlaced output */
|
|
if (interlaced && config.render)
|
|
{
|
|
line = (line * 2) + odd_frame;
|
|
}
|
|
|
|
/* NTSC Filter (only supported for 15 or 16-bit pixels rendering) */
|
|
#if defined(USE_15BPP_RENDERING) || defined(USE_16BPP_RENDERING)
|
|
if (config.ntsc)
|
|
{
|
|
if (reg[12] & 0x01)
|
|
{
|
|
md_ntsc_blit(md_ntsc, ( MD_NTSC_IN_T const * )pixel, src, width, line);
|
|
}
|
|
else
|
|
{
|
|
sms_ntsc_blit(sms_ntsc, ( SMS_NTSC_IN_T const * )pixel, src, width, line);
|
|
}
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
/* Convert VDP pixel data to output pixel format */
|
|
#ifdef CUSTOM_BLITTER
|
|
CUSTOM_BLITTER(line, width, pixel, src)
|
|
#else
|
|
PIXEL_OUT_T *dst =((PIXEL_OUT_T *)&bitmap.data[(line * bitmap.pitch)]);
|
|
do
|
|
{
|
|
*dst++ = pixel[*src++];
|
|
}
|
|
while (--width);
|
|
#endif
|
|
}
|
|
}
|