c:graphics.h:getmaxcolor
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c:graphics.h:getmaxcolor [2015/05/06 23:06] |
c:graphics.h:getmaxcolor [2024/02/16 01:05] (current) |
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| + | ===== getmaxcolor ===== | ||
| + | |||
| + | |||
| + | ====Syntax of getmaxcolor ==== | ||
| + | <code c> | ||
| + | #include <graphics.h> | ||
| + | int getmaxcolor(void); | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== Description of getmaxcolor ==== | ||
| + | <code c> | ||
| + | getmaxcolor returns the highest valid color value for the current | ||
| + | graphics driver and mode that can be passed to setcolor. | ||
| + | For example, on a 256K EGA, getmaxcolor always returns 15, which means | ||
| + | that any call to setcolor with a value from 0 to 15 is valid. On a CGA in | ||
| + | high-resolution mode or on a Hercules monochrome adapter, getmaxcolor | ||
| + | returns a value of 1. | ||
| + | Windows Notes | ||
| + | The winbgim version of getmaxcolor returns 15 for the maximum color. | ||
| + | However, in addition to the usual BGI colors (0 through 15), the | ||
| + | programmer may also use RGB_colors. | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== Example of getmaxcolor ==== | ||
| + | <code c> | ||
| + | /* getmaxcolor example */ | ||
| + | |||
| + | #include <graphics.h> | ||
| + | #include <stdlib.h> | ||
| + | #include <stdio.h> | ||
| + | #include <conio.h> | ||
| + | |||
| + | int main(void) | ||
| + | { | ||
| + | /* request autodetection */ | ||
| + | int gdriver = DETECT, gmode, errorcode; | ||
| + | int midx, midy; | ||
| + | char colstr[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 */ | ||
| + | } | ||
| + | |||
| + | midx = getmaxx() / 2; | ||
| + | midy = getmaxy() / 2; | ||
| + | |||
| + | /* grab the color info. and convert it to a string */ | ||
| + | sprintf(colstr, "This mode supports colors 0..%d", getmaxcolor()); | ||
| + | |||
| + | /* display the information */ | ||
| + | settextjustify(CENTER_TEXT, CENTER_TEXT); | ||
| + | outtextxy(midx, midy, colstr); | ||
| + | |||
| + | /* clean up */ | ||
| + | getch(); | ||
| + | closegraph(); | ||
| + | |||
| + | return 0; | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== See also ==== | ||
| + | [[getbkcolor]] | ||
| + | [[getcolor]] | ||
| + | [[getpalette]] | ||
| + | [[getpalettesize]] | ||
| + | [[setcolor]] | ||
| + | |||
| + | |||
| + | ===== output of getmaxcolor example ===== | ||
| + | |||
| + | no output of example at the moment | ||
| + | do not hesitate and add it... | ||
| + | |||
| + | |||
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