/* *    Example program for the Allegro library, by Shawn Hargreaves. * *    This program shows how to convert colors between the RGB and HSV *    representations. */#include "allegro.h"/* slider types (R, G, B, and H, S, V) */#define S_R    0#define S_G    1#define S_B    2#define S_H    3#define S_S    4#define S_V    5/* the current color values */static int colors[6] ={   255,     /* red */   255,     /* green */   255,     /* blue */   0,       /* hue */   0,       /* saturation */   255      /* value */};/* helper for changing one of the color values */int update_color(void *dp3, int val){   int type = ((unsigned long)dp3 - (unsigned long)colors) / sizeof(colors[0]);   int r, g, b;   float h, s, v;   RGB rgb;   if (colors[type] != val) {      colors[type] = val;      if ((type == S_R) || (type == S_G) || (type == S_B)) {	 /* convert RGB color to HSV */	 r = colors[S_R];	 g = colors[S_G];	 b = colors[S_B];	 rgb_to_hsv(r, g, b, &h, &s, &v);	 colors[S_H] = h * 255.0 / 360.0;	 colors[S_S] = s * 255.0;	 colors[S_V] = v * 255.0;      }      else {	 /* convert HSV color to RGB */	 h = colors[S_H] * 360.0 / 255.0;	 s = colors[S_S] / 255.0;	 v = colors[S_V] / 255.0;	 hsv_to_rgb(h, s, v, &r, &g, &b);	 colors[S_R] = r;	 colors[S_G] = g;	 colors[S_B] = b;      }      /* set the screen background to the new color */      rgb.r = colors[S_R]/4;      rgb.g = colors[S_G]/4;      rgb.b = colors[S_B]/4;      vsync();      set_color(0, &rgb);   }    return D_O_K;}/* gui object procedure for the color selection sliders */int my_slider_proc(int msg, DIALOG *d, int c){   int *color = (int *)d->dp3;   switch (msg) {      case MSG_START:	 /* initialise the slider position */	 d->d2 = *color;	 break;      case MSG_IDLE:	 /* has the slider position changed? */	 if (d->d2 != *color) {	    d->d2 = *color;	    show_mouse(NULL);	    object_message(d, MSG_DRAW, 0);	    show_mouse(screen);	 }	 break;   }   return d_slider_proc(msg, d, c);}DIALOG the_dlg[] ={   /* (dialog proc)     (x)   (y)   (w)   (h)   (fg)  (bg)  (key) (flags)  (d1)  (d2)  (dp)     (dp2)          (dp3) */   { my_slider_proc,    32,   32,   256,  16,   1,    0,    0,    0,       255,  0,    NULL,    update_color,  &colors[S_R]  },   { my_slider_proc,    48,   64,   256,  16,   2,    0,    0,    0,       255,  0,    NULL,    update_color,  &colors[S_G]  },   { my_slider_proc,    64,   96,   256,  16,   4,    0,    0,    0,       255,  0,    NULL,    update_color,  &colors[S_B]  },   { my_slider_proc,    320,  368,  256,  16,   255,  0,    0,    0,       255,  0,    NULL,    update_color,  &colors[S_H]  },   { my_slider_proc,    336,  400,  256,  16,   255,  0,    0,    0,       255,  0,    NULL,    update_color,  &colors[S_S]  },   { my_slider_proc,    352,  432,  256,  16,   255,  0,    0,    0,       255,  0,    NULL,    update_color,  &colors[S_V]  },   { d_text_proc,       300,  38,   0,    0,    255,  0,    0,    0,       0,    0,    "R",     NULL,          NULL          },   { d_text_proc,       316,  70,   0,    0,    255,  0,    0,    0,       0,    0,    "G",     NULL,          NULL          },   { d_text_proc,       332,  102,  0,    0,    255,  0,    0,    0,       0,    0,    "B",     NULL,          NULL          },   { d_text_proc,       302,  374,  0,    0,    255,  0,    0,    0,       0,    0,    "H",     NULL,          NULL          },   { d_text_proc,       318,  406,  0,    0,    255,  0,    0,    0,       0,    0,    "S",     NULL,          NULL          },   { d_text_proc,       334,  438,  0,    0,    255,  0,    0,    0,       0,    0,    "V",     NULL,          NULL          },   { NULL,              0,    0,    0,    0,    0,    0,    0,    0,       0,    0,    NULL,    NULL,          NULL          }};int main(void){   allegro_init();   install_keyboard();   install_mouse();   install_timer();   if (set_gfx_mode(GFX_AUTODETECT, 640, 480, 0, 0) != 0) {      allegro_message("Error setting graphics mode\n%s\n", allegro_error);      return 1;   }   set_palette(desktop_palette);   clear_bitmap(screen);   do_dialog(the_dlg, -1);   return 0;}END_OF_MAIN();

lib/all403/allegro/examples/exrgbhsv.c: In function `int update_color(void*,    int)':lib/all403/allegro/examples/exrgbhsv.c:55: warning: assignment to `int' from `   double'lib/all403/allegro/examples/exrgbhsv.c:55: warning: argument to `int' from `   double'lib/all403/allegro/examples/exrgbhsv.c:56: warning: assignment to `int' from `   double'lib/all403/allegro/examples/exrgbhsv.c:56: warning: argument to `int' from `   double'lib/all403/allegro/examples/exrgbhsv.c:57: warning: assignment to `int' from `   double'lib/all403/allegro/examples/exrgbhsv.c:57: warning: argument to `int' from `   double'lib/all403/allegro/examples/exrgbhsv.c: At global scope:lib/all403/allegro/examples/exrgbhsv.c:130: error: invalid conversion from `int    (*)(void*, int)' to `void*'lib/all403/allegro/examples/exrgbhsv.c:130: error: invalid conversion from `int    (*)(void*, int)' to `void*'lib/all403/allegro/examples/exrgbhsv.c:130: error: invalid conversion from `int    (*)(void*, int)' to `void*'lib/all403/allegro/examples/exrgbhsv.c:130: error: invalid conversion from `int    (*)(void*, int)' to `void*'lib/all403/allegro/examples/exrgbhsv.c:130: error: invalid conversion from `int    (*)(void*, int)' to `void*'lib/all403/allegro/examples/exrgbhsv.c:130: error: invalid conversion from `int    (*)(void*, int)' to `void*'lib/all403/allegro/examples/exrgbhsv.c:130: error: invalid conversion from `   const void*' to `void*'lib/all403/allegro/examples/exrgbhsv.c:130: error: invalid conversion from `   const void*' to `void*'lib/all403/allegro/examples/exrgbhsv.c:130: error: invalid conversion from `   const void*' to `void*'lib/all403/allegro/examples/exrgbhsv.c:130: error: invalid conversion from `   const void*' to `void*'lib/all403/allegro/examples/exrgbhsv.c:130: error: invalid conversion from `   const void*' to `void*'lib/all403/allegro/examples/exrgbhsv.c:130: error: invalid conversion from `   const void*' to `void*'make.exe: *** [lib/all403/allegro/examples/exrgbhsv.o] Error 1Execution terminated