mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-11-10 21:05:12 +01:00
117 lines
6.1 KiB
C
117 lines
6.1 KiB
C
/***************************************************************************************
|
|
* Genesis Plus
|
|
* CD graphics processor
|
|
*
|
|
* Copyright (C) 2012-2019 Eke-Eke (Genesis Plus GX)
|
|
*
|
|
* Redistribution and use of this code or any derivative works are permitted
|
|
* provided that the following conditions are met:
|
|
*
|
|
* - Redistributions may not be sold, nor may they be used in a commercial
|
|
* product or activity.
|
|
*
|
|
* - Redistributions that are modified from the original source must include the
|
|
* complete source code, including the source code for all components used by a
|
|
* binary built from the modified sources. However, as a special exception, the
|
|
* source code distributed need not include anything that is normally distributed
|
|
* (in either source or binary form) with the major components (compiler, kernel,
|
|
* and so on) of the operating system on which the executable runs, unless that
|
|
* component itself accompanies the executable.
|
|
*
|
|
* - Redistributions must reproduce the above copyright notice, this list of
|
|
* conditions and the following disclaimer in the documentation and/or other
|
|
* materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************************/
|
|
#ifndef _CD_GFX_
|
|
#define _CD_GFX_
|
|
|
|
#define gfx scd.gfx_hw
|
|
|
|
typedef struct
|
|
{
|
|
uint32 cycles; /* current cycles count for graphics operation */
|
|
uint32 cyclesPerLine; /* current graphics operation timings */
|
|
uint32 dotMask; /* stamp map size mask */
|
|
uint16 *tracePtr; /* trace vector pointer */
|
|
uint16 *mapPtr; /* stamp map table base address */
|
|
uint8 stampShift; /* stamp pixel shift value (related to stamp size) */
|
|
uint8 mapShift; /* stamp map table shift value (related to stamp map size) */
|
|
uint16 bufferOffset; /* image buffer column offset */
|
|
uint32 bufferStart; /* image buffer start index */
|
|
uint16 lut_offset[0x8000]; /* Cell Image -> WORD-RAM offset lookup table (1M Mode) */
|
|
uint8 lut_prio[4][0x100][0x100]; /* WORD-RAM data writes priority lookup table */
|
|
uint8 lut_pixel[0x200]; /* Graphics operation dot offset lookup table */
|
|
uint8 lut_cell[0x100]; /* Graphics operation stamp offset lookup table */
|
|
} gfx_t;
|
|
|
|
|
|
/***************************************************************/
|
|
/* WORD-RAM DMA interfaces (1M & 2M modes) */
|
|
/***************************************************************/
|
|
extern void word_ram_0_dma_w(unsigned int words);
|
|
extern void word_ram_1_dma_w(unsigned int words);
|
|
extern void word_ram_2M_dma_w(unsigned int words);
|
|
|
|
/***************************************************************/
|
|
/* WORD-RAM 0 & 1 CPU interfaces (1M mode) */
|
|
/***************************************************************/
|
|
extern unsigned int word_ram_0_read16(unsigned int address);
|
|
extern unsigned int word_ram_1_read16(unsigned int address);
|
|
extern void word_ram_0_write16(unsigned int address, unsigned int data);
|
|
extern void word_ram_1_write16(unsigned int address, unsigned int data);
|
|
extern unsigned int word_ram_0_read8(unsigned int address);
|
|
extern unsigned int word_ram_1_read8(unsigned int address);
|
|
extern void word_ram_0_write8(unsigned int address, unsigned int data);
|
|
extern void word_ram_1_write8(unsigned int address, unsigned int data);
|
|
|
|
/***************************************************************/
|
|
/* WORD-RAM 0 & 1 DOT image SUB-CPU interface (1M mode) */
|
|
/***************************************************************/
|
|
extern unsigned int dot_ram_0_read16(unsigned int address);
|
|
extern unsigned int dot_ram_1_read16(unsigned int address);
|
|
extern void dot_ram_0_write16(unsigned int address, unsigned int data);
|
|
extern void dot_ram_1_write16(unsigned int address, unsigned int data);
|
|
extern unsigned int dot_ram_0_read8(unsigned int address);
|
|
extern unsigned int dot_ram_1_read8(unsigned int address);
|
|
extern void dot_ram_0_write8(unsigned int address, unsigned int data);
|
|
extern void dot_ram_1_write8(unsigned int address, unsigned int data);
|
|
|
|
|
|
/***************************************************************/
|
|
/* WORD-RAM 0 & 1 CELL image MAIN-CPU interface (1M mode) */
|
|
/***************************************************************/
|
|
extern unsigned int cell_ram_0_read16(unsigned int address);
|
|
extern unsigned int cell_ram_1_read16(unsigned int address);
|
|
extern void cell_ram_0_write16(unsigned int address, unsigned int data);
|
|
extern void cell_ram_1_write16(unsigned int address, unsigned int data);
|
|
extern unsigned int cell_ram_0_read8(unsigned int address);
|
|
extern unsigned int cell_ram_1_read8(unsigned int address);
|
|
extern void cell_ram_0_write8(unsigned int address, unsigned int data);
|
|
extern void cell_ram_1_write8(unsigned int address, unsigned int data);
|
|
|
|
|
|
/***************************************************************/
|
|
/* Rotation / Scaling operation (2M mode) */
|
|
/***************************************************************/
|
|
extern void gfx_init(void);
|
|
extern void gfx_reset(void);
|
|
extern int gfx_context_save(uint8 *state);
|
|
extern int gfx_context_load(uint8 *state);
|
|
extern void gfx_start(unsigned int base, int cycles);
|
|
extern void gfx_update(int cycles);
|
|
|
|
#endif
|