c:graphics.h:getpalette
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c:graphics.h:getpalette [2015/05/06 23:06] |
c:graphics.h:getpalette [2024/02/16 01:05] (current) |
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| + | ===== getpalette ===== | ||
| + | |||
| + | |||
| + | ====Syntax of getpalette ==== | ||
| + | <code c> | ||
| + | #include <graphics.h> | ||
| + | void getpalette(struct palettetype *palette); | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== Description of getpalette ==== | ||
| + | <code c> | ||
| + | getpalette fills the palettetype structure pointed to by palette with | ||
| + | information about the current palette's size and colors. | ||
| + | The MAXCOLORS constant and the palettetype structure used by getpalette | ||
| + | are defined in graphics.h as follows: | ||
| + | #define MAXCOLORS 15 | ||
| + | |||
| + | struct palettetype { | ||
| + | unsigned char size; | ||
| + | signed char colors[MAXCOLORS + 1]; | ||
| + | }; | ||
| + | size gives the number of colors in the palette for the current graphics | ||
| + | driver in the current mode. | ||
| + | colors is an array of size bytes containing the actual raw color numbers | ||
| + | for each entry in the palette. | ||
| + | getpalette cannot be used with the IBM-8514 driver. | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== Example of getpalette ==== | ||
| + | <code c> | ||
| + | /* getpalette example */ | ||
| + | |||
| + | #include <graphics.h> | ||
| + | #include <stdlib.h> | ||
| + | #include <stdio.h> | ||
| + | #include <conio.h> | ||
| + | |||
| + | int main() | ||
| + | { | ||
| + | |||
| + | /* request autodetection */ | ||
| + | int gdriver = DETECT, gmode, errorcode; | ||
| + | struct palettetype pal; | ||
| + | char psize[80], pval[20]; | ||
| + | int i, ht; | ||
| + | int y = 10; | ||
| + | |||
| + | /* 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 */ | ||
| + | } | ||
| + | |||
| + | /* grab a copy of the palette */ | ||
| + | getpalette(&pal); | ||
| + | |||
| + | /* convert palette info into strings */ | ||
| + | sprintf(psize, "The palette has %d modifiable entries.", pal.size); | ||
| + | |||
| + | /* display the information */ | ||
| + | outtextxy(0, y, psize); | ||
| + | if (pal.size != 0) { | ||
| + | ht = textheight("W"); | ||
| + | |||
| + | y += 2*ht; | ||
| + | outtextxy(0, y, "Here are the current values:"); | ||
| + | y += 2*ht; | ||
| + | for (i=0; i<pal.size; i++, y+=ht) { | ||
| + | sprintf(pval, "palette[%02d]: 0x%02X", i, pal.colors[i]); | ||
| + | outtextxy(0, y, pval); | ||
| + | } | ||
| + | } | ||
| + | |||
| + | /* clean up */ | ||
| + | getch(); | ||
| + | closegraph(); | ||
| + | return 0; | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== See also ==== | ||
| + | [[getbkcolor]] | ||
| + | [[getcolor]] | ||
| + | [[getdefaultpalette]] | ||
| + | [[getmaxcolor]] | ||
| + | [[setallpalette]] | ||
| + | [[setpalette]] | ||
| + | |||
| + | |||
| + | ===== output of getpalette example ===== | ||
| + | |||
| + | no output of example at the moment | ||
| + | do not hesitate and add it... | ||
| + | |||
| + | |||
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