c:graphics.h:setpalette
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| + | ===== setpalette ===== | ||
| + | |||
| + | ====Syntax of setpalette==== | ||
| + | <code c> | ||
| + | #include <graphics.h> | ||
| + | void setpalette(int colornum, int color); | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== Description of setpalette ==== | ||
| + | <code c> | ||
| + | setpalette changes the colornum entry in the palette to color. For | ||
| + | example, setpalette(0,5) changes the first color in the current palette | ||
| + | (the background color) to actual color number 5. If size is the number of | ||
| + | entries in the current palette, colornum can range between 0 and (size - | ||
| + | 1). | ||
| + | You can partially (or completely) change the colors in the EGA/VGA | ||
| + | palette with setpalette. On a CGA, you can only change the first entry in | ||
| + | the palette (colornum equals 0, the background color) with a call to | ||
| + | setpalette. | ||
| + | The color parameter passed to setpalette can be represented by symbolic | ||
| + | constants which are defined in graphics.h. | ||
| + | Name Value | ||
| + | BLACK 0 | ||
| + | BLUE 1 | ||
| + | GREEN 2 | ||
| + | CYAN 3 | ||
| + | RED 4 | ||
| + | MAGENTA 5 | ||
| + | BROWN 6 | ||
| + | LIGHTGRAY 7 | ||
| + | DARKGRAY 8 | ||
| + | LIGHTBLUE 9 | ||
| + | LIGHTGREEN 10 | ||
| + | LIGHTCYAN 11 | ||
| + | LIGHTRED 12 | ||
| + | LIGHTMAGENTA 13 | ||
| + | YELLOW 14 | ||
| + | WHITE 15 | ||
| + | setpalette cannot be used with the IBM-8514 driver; use setrgbpalette | ||
| + | instead. | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== Example of setpalette ==== | ||
| + | <code c> | ||
| + | /* setpalette example */ | ||
| + | |||
| + | #include <graphics.h> | ||
| + | #include <stdlib.h> | ||
| + | #include <stdio.h> | ||
| + | #include <conio.h> | ||
| + | |||
| + | int main(void) | ||
| + | { | ||
| + | /* request autodetection */ | ||
| + | int gdriver = DETECT, gmode, errorcode; | ||
| + | int color, maxcolor, ht; | ||
| + | int y = 10; | ||
| + | char msg[80]; | ||
| + | |||
| + | /* initialize graphics and local variables */ | ||
| + | initgraph(&gdriver, &gmode, ""); | ||
| + | |||
| + | /* read result of initialization */ | ||
| + | errorcode = graphresult(); | ||
| + | if (errorcode != grOk) { /* an error occurred */ | ||
| + | printf("Graphics error: %s\n", grapherrormsg(errorcode)); | ||
| + | |||
| + | printf("Press any key to halt:"); | ||
| + | getch(); | ||
| + | exit(1); /* terminate with an error code */ | ||
| + | } | ||
| + | |||
| + | maxcolor = getmaxcolor(); | ||
| + | ht = 2 * textheight("W"); | ||
| + | |||
| + | /* display the default colors */ | ||
| + | for (color=1; color<=maxcolor; color++) { | ||
| + | setcolor(color); | ||
| + | sprintf(msg, "Color: %d", color); | ||
| + | outtextxy(1, y, msg); | ||
| + | y += ht; | ||
| + | } | ||
| + | |||
| + | /* wait for a key */ | ||
| + | getch(); | ||
| + | |||
| + | /* black out the colors one by one */ | ||
| + | for (color=1; color<=maxcolor; color++) { | ||
| + | |||
| + | setpalette(color, BLACK); | ||
| + | getch(); | ||
| + | } | ||
| + | |||
| + | /* clean up */ | ||
| + | closegraph(); | ||
| + | return 0; | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== See also ==== | ||
| + | [[setrgbpalette]] | ||
| + | |||
| + | |||
| + | ===== output of setpalette example ===== | ||
| + | |||
| + | no output of example at the moment | ||
| + | do not hesitate and add it... | ||
| + | |||
| + | |||
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c/graphics.h/setpalette.txt · Last modified: 2024/02/16 01:05 (external edit)
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