Category : Miscellaneous Language Source Code
Archive : C-256VGA.ZIP
Filename : COLORTST.C
Output of file : COLORTST.C contained in archive : C-256VGA.ZIP
/*----------------------------------------------*/
/* VGA256.BGI Designer VGA BGI driver */
/* COLORTST.C Color test program */
/* */
/* Compile in: Any model!!!!! (except tiny) */
/* */
/* By: Markham Thomas Feb 3, 1989 */
/*----------------------------------------------*/
#include
#include
#include
#include "VGA256.H" /* pick up the main BGI defines */
#include "VGAEXTRA.H" /* pick up detect & misc. functions */
int g_driver, g_mode, g_error;
/*----------------- Array for RGB color info ------------------------*/
DACarray Palette_Array; /* create array to hold DAC values */
/*----------------- RGB colors from HSV model ---------------------------*/
/* hue = pure color of the light
sat = how much white light is mixed in
value = max component of RGB */
void hsv2rgb(float h,float s,float v,RGB *Color)
{
float h1,f,a[7];
int i;
h1 = h / 60;
i = h1;
f = h1 - i;
a[1] = v;
a[2] = v;
a[3] = v * (1 - (s*f));
a[4] = v * (1 - s);
a[5] = a[4];
a[6] = v * (1-(s*(1-f)));
if (i>4) i = i - 4; else i = i + 2;
Color->Red = a[i];
if (i>4) i = i - 4; else i = i + 2;
Color->Green = a[i];
if (i>4) i = i - 4; else i = i + 2;
Color->Blue = a[i];
}
/*----------------- Draw all 256 colors on screen ------------------------*/
void Palette_List()
{
int x,y,xw,yh,xinc,yinc,count;
int x1,y1,x2,y2;
xw = (getmaxx() / 16) - 5;
yh = (getmaxy() / 16) - 5;
xinc = xw + 5;
yinc = yh + 5;
x1 = 0;
y1 = 0;
x2 = xw;
y2 = yh;
count = 0;
setcolor(255);
for (x=0;x<256;x++) {
setfillstyle(SOLID_FILL,x);
bar(x1,y1,x2,y2);
line(x1,y1,x2,y1);
line(x2,y1,x2,y2);
line(x2,y2,x1,y2);
line(x1,y2,x1,y1);
x1 = x1 + xinc;
x2 = x2 + xinc;
count = ++count;
if (count == 16) {
x1 = 0;
y1 = y1 + yinc;
x2 = xw;
y2 = y2 + yinc;
count = 0;
}
}
}
/*----------------- Main Program -----------------------------------------*/
void main()
{
int x,y;
RGB ColorValue;
int count;
float hue,sat,val;
installuserdriver("VGA256",DetectVGA256); /* install my BGI driver */
g_driver = DETECT; /* AutoDetect Designer VGA */
initgraph(&g_driver,&g_mode,"");
g_error = graphresult();
if (g_error != 0) {
printf("%s \n",grapherrormsg(g_error));
exit(1);
}
hue = 0;
sat = 1.0;
val = 63.0;
for (x=1; x<255; x++) {
hsv2rgb(hue,sat,val,&ColorValue);
Palette_Array[x][red] = ColorValue.Red;
Palette_Array[x][grn] = ColorValue.Green;
Palette_Array[x][blu] = ColorValue.Blue;
hue = hue + 1.44;
}
Palette_Array[0][red] = 1; /* Set first DAC register to black */
Palette_Array[0][grn] = 2;
Palette_Array[0][blu] = 3;
Palette_Array[255][red] = 0x3f; /* Set last DAC register to white */
Palette_Array[255][grn] = 0x3f;
Palette_Array[255][blu] = 0x3f;
/* flashmodeon(); */ /* put vram into hyperdrive... */
setvgapalette(Palette_Array); /* load DAC registers with new colors */
Palette_List(); /* display the 256 colors */
/* flashmodeoff(); */ /* slow down to reality..(wait states) */
getch();
restorecrtmode();
}
/* Don't use flashmodes unless TSENG LABS based chip set in VGA */
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