mirror of
https://github.com/retro100/dosbox-wii.git
synced 2024-06-07 04:58:44 +02:00
533 lines
12 KiB
C++
533 lines
12 KiB
C++
/*
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* Copyright (C) 2002-2019 The DOSBox Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef DOSBOX_VGA_H
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#define DOSBOX_VGA_H
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#ifndef DOSBOX_DOSBOX_H
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#include "dosbox.h"
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#endif
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//Don't enable keeping changes and mapping lfb probably...
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#define VGA_LFB_MAPPED
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//#define VGA_KEEP_CHANGES
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#define VGA_CHANGE_SHIFT 9
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class PageHandler;
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enum VGAModes {
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M_CGA2, M_CGA4,
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M_EGA, M_VGA,
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M_LIN4, M_LIN8, M_LIN15, M_LIN16, M_LIN32,
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M_TEXT,
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M_HERC_GFX, M_HERC_TEXT,
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M_CGA16, M_TANDY2, M_TANDY4, M_TANDY16, M_TANDY_TEXT,
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M_ERROR
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};
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#define CLK_25 25175
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#define CLK_28 28322
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#define MIN_VCO 180000
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#define MAX_VCO 360000
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#define S3_CLOCK_REF 14318 /* KHz */
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#define S3_CLOCK(_M,_N,_R) ((S3_CLOCK_REF * ((_M) + 2)) / (((_N) + 2) * (1 << (_R))))
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#define S3_MAX_CLOCK 150000 /* KHz */
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#define S3_XGA_1024 0x00
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#define S3_XGA_1152 0x01
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#define S3_XGA_640 0x40
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#define S3_XGA_800 0x80
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#define S3_XGA_1280 0xc0
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#define S3_XGA_WMASK (S3_XGA_640|S3_XGA_800|S3_XGA_1024|S3_XGA_1152|S3_XGA_1280)
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#define S3_XGA_8BPP 0x00
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#define S3_XGA_16BPP 0x10
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#define S3_XGA_32BPP 0x30
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#define S3_XGA_CMASK (S3_XGA_8BPP|S3_XGA_16BPP|S3_XGA_32BPP)
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typedef struct {
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bool attrindex;
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} VGA_Internal;
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typedef struct {
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/* Memory handlers */
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Bitu mh_mask;
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/* Video drawing */
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Bitu display_start;
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Bitu real_start;
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bool retrace; /* A retrace is active */
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Bitu scan_len;
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Bitu cursor_start;
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/* Some other screen related variables */
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Bitu line_compare;
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bool chained; /* Enable or Disabled Chain 4 Mode */
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bool compatible_chain4;
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/* Pixel Scrolling */
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Bit8u pel_panning; /* Amount of pixels to skip when starting horizontal line */
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Bit8u hlines_skip;
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Bit8u bytes_skip;
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Bit8u addr_shift;
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/* Specific stuff memory write/read handling */
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Bit8u read_mode;
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Bit8u write_mode;
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Bit8u read_map_select;
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Bit8u color_dont_care;
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Bit8u color_compare;
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Bit8u data_rotate;
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Bit8u raster_op;
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Bit32u full_bit_mask;
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Bit32u full_map_mask;
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Bit32u full_not_map_mask;
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Bit32u full_set_reset;
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Bit32u full_not_enable_set_reset;
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Bit32u full_enable_set_reset;
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Bit32u full_enable_and_set_reset;
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} VGA_Config;
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typedef enum {
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PART,
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DRAWLINE,
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EGALINE
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} Drawmode;
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typedef struct {
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bool resizing;
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Bitu width;
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Bitu height;
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Bitu blocks;
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Bitu address;
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Bitu panning;
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Bitu bytes_skip;
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Bit8u *linear_base;
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Bitu linear_mask;
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Bitu address_add;
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Bitu line_length;
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Bitu address_line_total;
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Bitu address_line;
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Bitu lines_total;
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Bitu vblank_skip;
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Bitu lines_done;
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Bitu lines_scaled;
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Bitu split_line;
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Bitu parts_total;
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Bitu parts_lines;
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Bitu parts_left;
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Bitu byte_panning_shift;
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struct {
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double framestart;
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double vrstart, vrend; // V-retrace
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double hrstart, hrend; // H-retrace
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double hblkstart, hblkend; // H-blanking
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double vblkstart, vblkend; // V-Blanking
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double vdend, vtotal;
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double hdend, htotal;
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double parts;
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} delay;
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Bitu bpp;
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double aspect_ratio;
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bool double_scan;
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bool doublewidth,doubleheight;
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Bit8u font[64*1024];
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Bit8u * font_tables[2];
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Bitu blinking;
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bool blink;
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bool char9dot;
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struct {
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Bitu address;
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Bit8u sline,eline;
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Bit8u count,delay;
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Bit8u enabled;
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} cursor;
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Drawmode mode;
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bool vret_triggered;
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bool vga_override;
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} VGA_Draw;
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typedef struct {
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Bit8u curmode;
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Bit16u originx, originy;
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Bit8u fstackpos, bstackpos;
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Bit8u forestack[4];
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Bit8u backstack[4];
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Bit16u startaddr;
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Bit8u posx, posy;
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Bit8u mc[64][64];
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} VGA_HWCURSOR;
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typedef struct {
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Bit8u reg_lock1;
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Bit8u reg_lock2;
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Bit8u reg_31;
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Bit8u reg_35;
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Bit8u reg_36; // RAM size
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Bit8u reg_3a; // 4/8/doublepixel bit in there
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Bit8u reg_40; // 8415/A functionality register
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Bit8u reg_41; // BIOS flags
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Bit8u reg_43;
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Bit8u reg_45; // Hardware graphics cursor
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Bit8u reg_50;
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Bit8u reg_51;
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Bit8u reg_52;
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Bit8u reg_55;
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Bit8u reg_58;
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Bit8u reg_6b; // LFB BIOS scratchpad
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Bit8u ex_hor_overflow;
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Bit8u ex_ver_overflow;
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Bit16u la_window;
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Bit8u misc_control_2;
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Bit8u ext_mem_ctrl;
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Bitu xga_screen_width;
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VGAModes xga_color_mode;
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struct {
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Bit8u r;
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Bit8u n;
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Bit8u m;
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} clk[4],mclk;
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struct {
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Bit8u lock;
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Bit8u cmd;
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} pll;
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VGA_HWCURSOR hgc;
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} VGA_S3;
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typedef struct {
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Bit8u mode_control;
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Bit8u enable_bits;
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} VGA_HERC;
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typedef struct {
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Bit8u index;
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Bit8u htotal;
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Bit8u hdend;
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Bit8u hsyncp;
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Bit8u hsyncw;
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Bit8u vtotal;
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Bit8u vdend;
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Bit8u vadjust;
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Bit8u vsyncp;
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Bit8u vsyncw;
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Bit8u max_scanline;
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Bit16u lightpen;
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bool lightpen_triggered;
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Bit8u cursor_start;
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Bit8u cursor_end;
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} VGA_OTHER;
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typedef struct {
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Bit8u pcjr_flipflop;
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Bit8u mode_control;
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Bit8u color_select;
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Bit8u disp_bank;
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Bit8u reg_index;
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Bit8u gfx_control;
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Bit8u palette_mask;
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Bit8u extended_ram;
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Bit8u border_color;
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Bit8u line_mask, line_shift;
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Bit8u draw_bank, mem_bank;
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Bit8u *draw_base, *mem_base;
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Bitu addr_mask;
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} VGA_TANDY;
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typedef struct {
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Bit8u index;
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Bit8u reset;
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Bit8u clocking_mode;
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Bit8u map_mask;
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Bit8u character_map_select;
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Bit8u memory_mode;
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} VGA_Seq;
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typedef struct {
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Bit8u palette[16];
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Bit8u mode_control;
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Bit8u horizontal_pel_panning;
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Bit8u overscan_color;
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Bit8u color_plane_enable;
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Bit8u color_select;
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Bit8u index;
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Bit8u disabled; // Used for disabling the screen.
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// Bit0: screen disabled by attribute controller index
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// Bit1: screen disabled by sequencer index 1 bit 5
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// These are put together in one variable for performance reasons:
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// the line drawing function is called maybe 60*480=28800 times/s,
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// and we only need to check one variable for zero this way.
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} VGA_Attr;
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typedef struct {
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Bit8u horizontal_total;
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Bit8u horizontal_display_end;
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Bit8u start_horizontal_blanking;
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Bit8u end_horizontal_blanking;
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Bit8u start_horizontal_retrace;
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Bit8u end_horizontal_retrace;
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Bit8u vertical_total;
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Bit8u overflow;
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Bit8u preset_row_scan;
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Bit8u maximum_scan_line;
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Bit8u cursor_start;
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Bit8u cursor_end;
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Bit8u start_address_high;
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Bit8u start_address_low;
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Bit8u cursor_location_high;
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Bit8u cursor_location_low;
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Bit8u vertical_retrace_start;
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Bit8u vertical_retrace_end;
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Bit8u vertical_display_end;
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Bit8u offset;
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Bit8u underline_location;
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Bit8u start_vertical_blanking;
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Bit8u end_vertical_blanking;
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Bit8u mode_control;
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Bit8u line_compare;
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Bit8u index;
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bool read_only;
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} VGA_Crtc;
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typedef struct {
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Bit8u index;
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Bit8u set_reset;
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Bit8u enable_set_reset;
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Bit8u color_compare;
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Bit8u data_rotate;
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Bit8u read_map_select;
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Bit8u mode;
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Bit8u miscellaneous;
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Bit8u color_dont_care;
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Bit8u bit_mask;
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} VGA_Gfx;
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typedef struct {
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Bit8u red;
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Bit8u green;
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Bit8u blue;
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} RGBEntry;
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typedef struct {
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Bit8u bits; /* DAC bits, usually 6 or 8 */
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Bit8u pel_mask;
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Bit8u pel_index;
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Bit8u state;
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Bit8u write_index;
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Bit8u read_index;
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Bitu first_changed;
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Bit8u combine[16];
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RGBEntry rgb[0x100];
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Bit16u xlat16[256];
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} VGA_Dac;
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typedef struct {
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Bitu readStart, writeStart;
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Bitu bankMask;
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Bitu bank_read_full;
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Bitu bank_write_full;
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Bit8u bank_read;
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Bit8u bank_write;
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Bitu bank_size;
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} VGA_SVGA;
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typedef union {
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Bit32u d;
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Bit8u b[4];
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} VGA_Latch;
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typedef struct {
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Bit8u* linear;
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Bit8u* linear_orgptr;
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} VGA_Memory;
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typedef struct {
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//Add a few more just to be safe
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Bit8u* map; /* allocated dynamically: [(VGA_MEMORY >> VGA_CHANGE_SHIFT) + 32] */
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Bit8u checkMask, frame, writeMask;
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bool active;
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Bit32u clearMask;
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Bit32u start, last;
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Bit32u lastAddress;
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} VGA_Changes;
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typedef struct {
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Bit32u page;
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Bit32u addr;
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Bit32u mask;
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PageHandler *handler;
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} VGA_LFB;
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typedef struct {
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VGAModes mode; /* The mode the vga system is in */
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Bit8u misc_output;
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VGA_Draw draw;
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VGA_Config config;
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VGA_Internal internal;
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/* Internal module groups */
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VGA_Seq seq;
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VGA_Attr attr;
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VGA_Crtc crtc;
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VGA_Gfx gfx;
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VGA_Dac dac;
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VGA_Latch latch;
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VGA_S3 s3;
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VGA_SVGA svga;
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VGA_HERC herc;
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VGA_TANDY tandy;
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VGA_OTHER other;
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VGA_Memory mem;
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Bit32u vmemwrap; /* this is assumed to be power of 2 */
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Bit8u* fastmem; /* memory for fast (usually 16-color) rendering, always twice as big as vmemsize */
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Bit8u* fastmem_orgptr;
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Bit32u vmemsize;
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#ifdef VGA_KEEP_CHANGES
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VGA_Changes changes;
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#endif
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VGA_LFB lfb;
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} VGA_Type;
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/* Hercules Palette function */
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void Herc_Palette(void);
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/* Functions for different resolutions */
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void VGA_SetMode(VGAModes mode);
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void VGA_DetermineMode(void);
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void VGA_SetupHandlers(void);
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void VGA_StartResize(Bitu delay=50);
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void VGA_SetupDrawing(Bitu val);
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void VGA_CheckScanLength(void);
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void VGA_ChangedBank(void);
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/* Some DAC/Attribute functions */
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void VGA_DAC_CombineColor(Bit8u attr,Bit8u pal);
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void VGA_DAC_SetEntry(Bitu entry,Bit8u red,Bit8u green,Bit8u blue);
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void VGA_ATTR_SetPalette(Bit8u index,Bit8u val);
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typedef enum {CGA, EGA, MONO} EGAMonitorMode;
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void VGA_ATTR_SetEGAMonitorPalette(EGAMonitorMode m);
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/* The VGA Subfunction startups */
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void VGA_SetupAttr(void);
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void VGA_SetupMemory(Section* sec);
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void VGA_SetupDAC(void);
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void VGA_SetupCRTC(void);
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void VGA_SetupMisc(void);
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void VGA_SetupGFX(void);
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void VGA_SetupSEQ(void);
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void VGA_SetupOther(void);
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void VGA_SetupXGA(void);
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/* Some Support Functions */
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void VGA_SetClock(Bitu which,Bitu target);
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void VGA_DACSetEntirePalette(void);
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void VGA_StartRetrace(void);
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void VGA_StartUpdateLFB(void);
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void VGA_SetBlinking(Bitu enabled);
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void VGA_SetCGA2Table(Bit8u val0,Bit8u val1);
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void VGA_SetCGA4Table(Bit8u val0,Bit8u val1,Bit8u val2,Bit8u val3);
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void VGA_ActivateHardwareCursor(void);
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void VGA_KillDrawing(void);
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void VGA_SetOverride(bool vga_override);
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extern VGA_Type vga;
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/* Support for modular SVGA implementation */
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/* Video mode extra data to be passed to FinishSetMode_SVGA().
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This structure will be in flux until all drivers (including S3)
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are properly separated. Right now it contains only three overflow
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fields in S3 format and relies on drivers re-interpreting those.
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For reference:
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ver_overflow:X|line_comp10|X|vretrace10|X|vbstart10|vdispend10|vtotal10
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hor_overflow:X|X|X|hretrace8|X|hblank8|hdispend8|htotal8
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offset is not currently used by drivers (useful only for S3 itself)
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It also contains basic int10 mode data - number, vtotal, htotal
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*/
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typedef struct {
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Bit8u ver_overflow;
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Bit8u hor_overflow;
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Bitu offset;
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Bitu modeNo;
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Bitu htotal;
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Bitu vtotal;
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} VGA_ModeExtraData;
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// Vector function prototypes
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typedef void (*tWritePort)(Bitu reg,Bitu val,Bitu iolen);
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typedef Bitu (*tReadPort)(Bitu reg,Bitu iolen);
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typedef void (*tFinishSetMode)(Bitu crtc_base, VGA_ModeExtraData* modeData);
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typedef void (*tDetermineMode)();
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typedef void (*tSetClock)(Bitu which,Bitu target);
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typedef Bitu (*tGetClock)();
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typedef bool (*tHWCursorActive)();
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typedef bool (*tAcceptsMode)(Bitu modeNo);
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struct SVGA_Driver {
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tWritePort write_p3d5;
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tReadPort read_p3d5;
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tWritePort write_p3c5;
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tReadPort read_p3c5;
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tWritePort write_p3c0;
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tReadPort read_p3c1;
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tWritePort write_p3cf;
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tReadPort read_p3cf;
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tFinishSetMode set_video_mode;
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tDetermineMode determine_mode;
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tSetClock set_clock;
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tGetClock get_clock;
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tHWCursorActive hardware_cursor_active;
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tAcceptsMode accepts_mode;
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};
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extern SVGA_Driver svga;
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void SVGA_Setup_S3Trio(void);
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void SVGA_Setup_TsengET4K(void);
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void SVGA_Setup_TsengET3K(void);
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void SVGA_Setup_ParadisePVGA1A(void);
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void SVGA_Setup_Driver(void);
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// Amount of video memory required for a mode, implemented in int10_modes.cpp
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Bitu VideoModeMemSize(Bitu mode);
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extern Bit32u ExpandTable[256];
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extern Bit32u FillTable[16];
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extern Bit32u CGA_2_Table[16];
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extern Bit32u CGA_4_Table[256];
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extern Bit32u CGA_4_HiRes_Table[256];
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extern Bit32u CGA_16_Table[256];
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extern Bit32u TXT_Font_Table[16];
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extern Bit32u TXT_FG_Table[16];
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extern Bit32u TXT_BG_Table[16];
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extern Bit32u Expand16Table[4][16];
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extern Bit32u Expand16BigTable[0x10000];
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#endif
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