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added 2 color cga and some pitch fixes

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@124
This commit is contained in:
Sjoerd van der Berg 2002-08-08 09:55:49 +00:00
parent b73647f308
commit a17e267b62
1 changed files with 45 additions and 22 deletions
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67
src/hardware/vga_draw.cpp
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@ -23,6 +23,11 @@
/* This Should draw a complete 16 colour screen */
void VGA_Render_GFX_2(Bit8u * * data) {
*data=vga.buffer;
VGA_DrawGFX2_Full(vga.buffer,vga.draw.width);
vga.config.retrace=true;
}
void VGA_Render_GFX_4(Bit8u * * data) {
*data=vga.buffer;
@ -51,11 +56,38 @@ void VGA_Render_TEXT_16(Bit8u * * data) {
vga.config.retrace=true;
}
void VGA_DrawGFX2_Full(Bit8u * bitdata,Bitu pitch) {
Bit8u * reader=real_host(0xB800,0);
Bit8u * draw;
for (Bitu y=0;y<vga.draw.height;y++) {
Bit8u * tempread;
tempread=reader;
if (y&1) {
tempread+=8*1024;
reader+=80;
};
draw=bitdata;
//TODO Look up table like in 4color mode
for (Bit32u x=0;x<vga.draw.width>>3;x++) {
Bit8u val=*(tempread++);
*(draw+0)=(val>>7)&1;
*(draw+1)=(val>>6)&1;
*(draw+2)=(val>>5)&1;
*(draw+3)=(val>>4)&1;
*(draw+4)=(val>>3)&1;
*(draw+5)=(val>>2)&1;
*(draw+6)=(val>>1)&1;
*(draw+7)=(val>>0)&1;
draw+=8;
}
bitdata+=pitch;
};
vga.config.retrace=true;
}
void VGA_DrawGFX4_Full(Bit8u * bitdata,Bitu next_line) {
//TODO use vga memory handler
void VGA_DrawGFX4_Full(Bit8u * bitdata,Bitu pitch) {
Bit8u * reader=real_host(0xB800,0);
Bit8u * draw;
for (Bitu y=0;y<vga.draw.height;y++) {
@ -68,23 +100,17 @@ void VGA_DrawGFX4_Full(Bit8u * bitdata,Bitu next_line) {
draw=bitdata;
for (Bit32u x=0;x<vga.draw.width>>2;x++) {
Bit8u val=*(tempread++);
/*
*(draw+0)=(val>>6)&3;
*(draw+1)=(val>>4)&3;
*(draw+2)=(val>>2)&3;
*(draw+3)=(val)&3;
draw+=4;
*/
*(Bit32u *)draw=CGAWriteTable[val];
draw+=4;
}
//TODO use scanline length and dword mode crap
bitdata+=next_line;
bitdata+=pitch;
};
vga.config.retrace=true;
}
void VGA_DrawGFX16_Full(Bit8u * bitdata,Bitu next_line) {
/* Draw the screen using the lookup buffer */
//TODO include split screen or something
void VGA_DrawGFX16_Fast(Bit8u * bitdata,Bitu next_line) {
Bit8u * reader=&vga.buffer[vga.config.display_start*8+vga.config.pel_panning];
for (Bitu y=0;y<vga.draw.height;y++) {
memcpy((void *)bitdata,(void *)reader,vga.draw.width);
@ -95,11 +121,10 @@ void VGA_DrawGFX16_Full(Bit8u * bitdata,Bitu next_line) {
};
/* This Should draw a complete 256 colour screen */
void VGA_DrawGFX256_Full(Bit8u * bitdata,Bitu next_line) {
Bit16u yreader=vga.config.display_start*1;
/* Now add pel panning */
/* TODO add pel panning */
for (Bitu y=0;y<vga.draw.height;y++) {
Bit16u xreader=yreader;
for (Bitu x=0;x<vga.draw.width>>2;x++) {
@ -108,27 +133,25 @@ void VGA_DrawGFX256_Full(Bit8u * bitdata,Bitu next_line) {
}
xreader++;
}
//TODO use scanline length and dword mode crap
yreader+=vga.config.scan_len*2;
bitdata+=next_line;
};
vga.config.retrace=true;
};
void VGA_DrawGFX256_Fast(Bit8u * bitdata,Bitu next_line) {
void VGA_DrawGFX256_Fast(Bit8u * bitdata,Bitu pitch) {
/* For now just copy 64 kb of memory with pitch support */
Bit8u * reader=memory+0xa0000;
for (Bitu y=0;y<vga.draw.height;y++) {
memcpy((void *)bitdata,(void *)reader,vga.draw.width);
bitdata+=vga.draw.width+next_line;
bitdata+=pitch;
reader+=vga.draw.width;
}
//memcpy((void *)bitdata,(void *)(memory+0xa0000),320*200);
vga.config.retrace=true;
};
void VGA_DrawTEXT(Bit8u * bitdata,Bitu next_line) {
void VGA_DrawTEXT(Bit8u * bitdata,Bitu pitch) {
Bit8u * reader=real_off(0xB800,0);
Bit8u * draw_start=bitdata;;
/* Todo Blinking and high intensity colors */
@ -144,18 +167,18 @@ void VGA_DrawTEXT(Bit8u * bitdata,Bitu next_line) {
for (Bitu y=0;y<16;y++) {
Bit8u bit_mask=*findex++;
#include "font-switch.h"
draw+=+next_line;
draw+=+pitch;
};
draw_char+=8;
};
draw_start+=16*next_line;
draw_start+=16*pitch;
};
vga.config.retrace=true;
/* Draw a cursor */
if ((vga.draw.cursor_col*8)>=vga.draw.width) return;
if ((vga.draw.cursor_row*16)>=vga.draw.height) return;
Bit8u * cursor_draw=bitdata+(vga.draw.cursor_row*16+15)*vga.draw.width+vga.draw.cursor_col*8;
Bit8u * cursor_draw=bitdata+(vga.draw.cursor_row*16+15)*pitch+vga.draw.cursor_col*8;
if (vga.draw.cursor_count>8) {
for (Bit8u loop=0;loop<8;loop++) *cursor_draw++=15;
}