102 lines
2.4 KiB
C++
102 lines
2.4 KiB
C++
#help_index "Graphics/Color"
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public I32 gr_rainbow_10[10]=
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{
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BLACK,BROWN,RED,LTRED,YELLOW,
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GREEN,BLUE,PURPLE,LTGRAY,WHITE
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};
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DefineLstLoad("ST_RAINBOW_10",
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"BLACK\0BROWN\0RED\0LTRED\0YELLOW\0"
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"GREEN\0BLUE\0PURPLE\0LTGRAY\0WHITE\0");
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U0 SetVGAPalette4Indices()
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{/*4-bit (16 color)
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There is a level of indirection we wish to identity map.
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This sets the 16-colors to use
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the first 16 DAC rgb entries, so
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we never need to worry about indexes,
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just DAC palette settings.
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*/
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I64 i;
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if (!sys_bios_gr_mode) return;
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PUSHFD
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CLI
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while (LBts(&sys_semas[SYS_SEMA_VGA],0))
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Yield;
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InU8(VGA_INPUT_STAT); //Rsts attr index/data
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for (i=0;i<16;i++) {
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OutU8(VGA_ATTR_INDEX,i);
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OutU8(VGA_ATTR_DATA_WRITE,i);
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}
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OutU8(VGA_ATTR_INDEX,0x20);
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OutU8(VGA_ATTR_DATA_WRITE,0); //Dummy write
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InU8(VGA_INPUT_STAT); //Rsts attr index/data
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LBtr(&sys_semas[SYS_SEMA_VGA],0);
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POPFD
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}
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public U0 SetVGAPaletteColor(I64 color_num,CBGR bgr)
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{//6-bits per b, g and r.
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if (!sys_bios_gr_mode) return;
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PUSHFD
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CLI
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while (LBts(&sys_semas[SYS_SEMA_VGA],0))
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Yield;
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OutU8(VGA_PALETTE_MASK,0xFF);
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OutU8(VGA_REG_WRITE,color_num);
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OutU8(VGA_PALETTE_DATA,bgr.r>>2);
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OutU8(VGA_PALETTE_DATA,bgr.g>>2);
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OutU8(VGA_PALETTE_DATA,bgr.b>>2);
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LBtr(&sys_semas[SYS_SEMA_VGA],0);
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POPFD
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}
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public CBGR GetVGAPaletteColor(I64 color_num)
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{//6-bits per b, g and r.
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CBGR result=0;
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if (!sys_bios_gr_mode) return 0;
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PUSHFD
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CLI
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while (LBts(&sys_semas[SYS_SEMA_VGA],0))
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Yield;
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OutU8(VGA_PALETTE_MASK,0xFF);
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OutU8(VGA_REG_READ,color_num);
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result.r=InU8(VGA_PALETTE_DATA)<<2;
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result.g=InU8(VGA_PALETTE_DATA)<<2;
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result.b=InU8(VGA_PALETTE_DATA)<<2;
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LBtr(&sys_semas[SYS_SEMA_VGA],0);
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POPFD
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return result;
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}
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public CBGR vga_palette4_std[16]={
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0x000000,0x0000AA,0x00AA00,0x00AAAA,
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0xAA0000,0xAA00AA,0xAA5500,0xAAAAAA,
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0x555555,0x5555FF,0x55FF55,0x55FFFF,
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0xFF5555,0xFF55FF,0xFFFF55,0xFFFFFF};
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public CBGR vga_palette4_gray[16]={
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0x000000,0x111111,0x222222,0x333333,
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0x444444,0x555555,0x666666,0x777777,
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0x888888,0x999999,0xAAAAAA,0xBBBBBB,
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0xCCCCCC,0xDDDDDD,0xEEEEEE,0xFFFFFF};
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public U0 GetVGAPalette4(CBGR *bgr)
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{//4-bit (16 color)
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I64 i;
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for (i=0;i<16;i++)
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bgr[i]=GetVGAPaletteColor(i);
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}
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public U0 SetVGAPalette4(CBGR *bgr)
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{//4-bit (16 color)
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I64 i;
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for (i=0;i<16;i++)
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SetVGAPaletteColor(i,bgr[i]);
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}
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public U0 SetStdPalette()
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{//Activate std palette.
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SetVGAPalette4(vga_palette4_std);
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}
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