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SVGAUTIL.C
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/************************************************/
/* */
/* SuperVGA utility routines */
/* Copyright (c) 1991 */
/* Jordan Hargraphix Software */
/* */
/************************************************/
#include <dos.h>
#include <graphics.h>
#include "svgautil.h"
#include "svga16.h"
#include "svga256.h"
#include "svga32k.h"
#include "svga64k.h"
#include "svgatc.h"
#include "svgas3.h"
#include "twk16.h"
#include "twk256.h"
/************************************************************************/
/* */
/* Enhanced color setting functions */
/* */
/* These functions are used to set the colors for the 32k/64k/TrueColor */
/* modes, as the BGI kernel can only handle 8-bit color values. */
/* */
/************************************************************************/
/********************************************************/
/* long RGB(char rVal, char gVal, char bVal); */
/* */
/* Purpose: Returns the color value for a R,G,B triple */
/* based on the current graphics mode. */
/* */
/* Input: */
/* char rVal - Red value [0..255] */
/* char gVal - Green value [0..255] */
/* char bVal - Blue value [0..255] */
/* */
/* Returns: */
/* long - Color value for this mode. */
/* */
/********************************************************/
long RGB(char rVal, char gVal, char bVal)
{
__rColor xColor;
switch(getmaxcolor()) {
case 32767:
xColor.c15.rVal = (rVal >> 3) & 0x1F;
xColor.c15.gVal = (gVal >> 3) & 0x1F;
xColor.c15.bVal = (bVal >> 3) & 0x1F;
break;
case 65535:
xColor.c16.rVal = (rVal >> 3) & 0x1F;
xColor.c16.gVal = (gVal >> 2) & 0x1F;
xColor.c16.bVal = (bVal >> 3) & 0x1F;
break;
case 16777:
xColor.c24.rVal = rVal;
xColor.c24.gVal = gVal;
xColor.c24.bVal = bVal;
break;
}
return (xColor.cval);
}
/****************************************************************/
/* long RealDrawColor(long color); */
/* */
/* Purpose: Sets the current drawing color for HC/TC modes. */
/* Used for 'setcolor' */
/* */
/* Input: */
/* long color - Color value */
/* */
/* Returns: */
/* long - Color value */
/* */
/****************************************************************/
long RealDrawColor(long color)
{
__rColor xColor;
xColor.cval = color;
/* Do color set hacks for hicolor/truecolor modes */
switch(getmaxcolor()) {
case 32767:
setrgbpalette(1024,xColor.c15.rVal,xColor.c15.gVal,xColor.c15.bVal);
break;
case 65535:
setrgbpalette(1024,xColor.c16.rVal,xColor.c16.gVal,xColor.c16.bVal);
break;
case 16777:
setrgbpalette(1024,xColor.c24.rVal,xColor.c24.gVal,xColor.c24.bVal);
break;
};
return color;
}
/****************************************************************/
/* long RealFillColor(long color); */
/* */
/* Purpose: Sets the current fill color for HC/TC modes. */
/* Used for 'setfillstyle' and 'setfillpattern' */
/* */
/* Input: */
/* long color - Color value */
/* */
/* Returns: */
/* long - Color value */
/* */
/****************************************************************/
long RealFillColor(long color)
{
__rColor xColor;
xColor.cval = color;
/* Do color set hacks for hicolor/truecolor modes */
switch(getmaxcolor()) {
case 32767:
setrgbpalette(1025,xColor.c15.rVal,xColor.c15.gVal,xColor.c15.bVal);
break;
case 65535:
setrgbpalette(1025,xColor.c16.rVal,xColor.c16.gVal,xColor.c16.bVal);
break;
case 16777:
setrgbpalette(1025,xColor.c24.rVal,xColor.c24.gVal,xColor.c24.bVal);
break;
};
return color;
}
/****************************************************************/
/* long RealColor(long color); */
/* */
/* Purpose: Sets the current color for HC/TC modes. */
/* Used for 'putpixel' and 'floodfill' */
/* */
/* Input: */
/* long color - Color value */
/* */
/* Returns: */
/* long - Color value */
/* */
/****************************************************************/
long RealColor(long color)
{
__rColor xColor;
xColor.cval = color;
/* Do color set hacks for hicolor/truecolor modes */
switch(getmaxcolor()) {
case 32767:
setrgbpalette(1026,xColor.c15.rVal,xColor.c15.gVal,xColor.c15.bVal);
break;
case 65535:
setrgbpalette(1026,xColor.c16.rVal,xColor.c16.gVal,xColor.c16.bVal);
break;
case 16777:
setrgbpalette(1026,xColor.c24.rVal,xColor.c24.gVal,xColor.c24.bVal);
break;
};
return color;
}
/* Getvgapalette16 gets the entire 16 color palette */
/* PalBuf contains RGB values for all 16 colors */
/* R,G,B values range from 0 to 63 */
/* Usage: */
/* DacPalette16 dac16; */
/* */
/* getvgapalette(&dac16); */
void getvgapalette16(DacPalette16 *PalBuf)
{
struct REGPACK reg;
reg.r_ax = 0x1017;
reg.r_bx = 0;
reg.r_cx = 16;
reg.r_es = FP_SEG(PalBuf);
reg.r_dx = FP_OFF(PalBuf);
intr(0x10,®);
}
/* Getvgapalette256 gets the entire 256 color palette */
/* PalBuf contains RGB values for all 256 colors */
/* R,G,B values range from 0 to 63 */
/* Usage: */
/* DacPalette256 dac256; */
/* */
/* getvgapalette256(&dac256); */
void getvgapalette256(DacPalette256 *PalBuf)
{
struct REGPACK reg;
reg.r_ax = 0x1017;
reg.r_bx = 0;
reg.r_cx = 256;
reg.r_es = FP_SEG(PalBuf);
reg.r_dx = FP_OFF(PalBuf);
intr(0x10,®);
}
/* Setvgapalette16 sets the entire 16 color palette */
/* PalBuf contains RGB values for all 16 colors */
/* R,G,B values range from 0 to 63 */
/* Usage: */
/* DacPalette16 dac16; */
/* */
/* setvgapalette(&dac16); */
void setvgapalette16(DacPalette16 *PalBuf)
{
struct REGPACK reg;
reg.r_ax = 0x1012;
reg.r_bx = 0;
reg.r_cx = 16;
reg.r_es = FP_SEG(PalBuf);
reg.r_dx = FP_OFF(PalBuf);
intr(0x10,®);
}
/* Setvgapalette256 sets the entire 256 color palette */
/* PalBuf contains RGB values for all 256 colors */
/* R,G,B values range from 0 to 63 */
/* Usage: */
/* DacPalette256 dac256; */
/* */
/* setvgapalette256(&dac256); */
void setvgapalette256(DacPalette256 *PalBuf)
{
struct REGPACK reg;
reg.r_ax = 0x1012;
reg.r_bx = 0;
reg.r_cx = 256;
reg.r_es = FP_SEG(PalBuf);
reg.r_dx = FP_OFF(PalBuf);
intr(0x10,®);
}