git.sur5r.net Git - cc65/blob - samples/tgidemo.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <conio.h>
   4 #include <ctype.h>
   5 #include <modload.h>
   6 #include <tgi.h>
   7
   8
   9
  10 #define COLOR_BACK      COLOR_BLACK
  11 #define COLOR_FORE      COLOR_WHITE
  12
  13
  14 /*****************************************************************************/
  15 /*                                   Data                                    */
  16 /*****************************************************************************/
  17
  18
  19
  20 static const unsigned char SinusTable[] = {
  21     0x64,0x63,0x61,0x5F,0x5D,0x5B,0x59,0x57,0x55,0x54,
  22     0x52,0x50,0x4E,0x4C,0x4A,0x49,0x47,0x45,0x43,0x42,
  23     0x40,0x3E,0x3C,0x3B,0x39,0x38,0x36,0x34,0x33,0x31,
  24     0x30,0x2E,0x2D,0x2B,0x2A,0x28,0x27,0x26,0x24,0x23,
  25     0x22,0x20,0x1F,0x1E,0x1D,0x1C,0x1B,0x1A,0x19,0x18,
  26     0x17,0x16,0x15,0x14,0x13,0x12,0x12,0x11,0x10,0x10,
  27     0x0F,0x0E,0x0E,0x0D,0x0D,0x0C,0x0C,0x0C,0x0B,0x0B,
  28     0x0B,0x0B,0x0B,0x0B,0x0B,0x0B,0x0B,0x0B,0x0B,0x0B,
  29     0x0B,0x0B,0x0B,0x0C,0x0C,0x0C,0x0D,0x0D,0x0E,0x0E,
  30     0x0F,0x10,0x10,0x11,0x12,0x12,0x13,0x14,0x15,0x16,
  31     0x17,0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,0x20,
  32     0x22,0x23,0x24,0x26,0x27,0x28,0x2A,0x2B,0x2D,0x2E,
  33     0x30,0x31,0x33,0x34,0x36,0x38,0x39,0x3B,0x3C,0x3E,
  34     0x40,0x42,0x43,0x45,0x47,0x49,0x4A,0x4C,0x4E,0x50,
  35     0x52,0x54,0x55,0x57,0x59,0x5B,0x5D,0x5F,0x61,0x63,
  36     0x64,0x65,0x67,0x69,0x6B,0x6D,0x6F,0x71,0x73,0x74,
  37     0x76,0x78,0x7A,0x7C,0x7E,0x7F,0x81,0x83,0x85,0x86,
  38     0x88,0x8A,0x8C,0x8D,0x8F,0x91,0x92,0x94,0x95,0x97,
  39     0x98,0x9A,0x9B,0x9D,0x9E,0xA0,0xA1,0xA2,0xA4,0xA5,
  40     0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,
  41     0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB6,0xB7,0xB8,0xB8,
  42     0xB9,0xBA,0xBA,0xBB,0xBB,0xBC,0xBC,0xBC,0xBD,0xBD,
  43     0xBD,0xBD,0xBD,0xBD,0xBD,0xBD,0xBD,0xBD,0xBD,0xBD,
  44     0xBD,0xBD,0xBD,0xBC,0xBC,0xBC,0xBB,0xBB,0xBA,0xBA,
  45     0xB9,0xB8,0xB8,0xB7,0xB6,0xB6,0xB5,0xB4,0xB3,0xB2,
  46     0xB1,0xB0,0xAF,0xAE,0xAD,0xAC,0xAB,0xAA,0xA9,0xA8,
  47     0xA6,0xA5,0xA4,0xA2,0xA1,0xA0,0x9E,0x9D,0x9B,0x9A,
  48     0x98,0x97,0x95,0x94,0x92,0x91,0x8F,0x8D,0x8C,0x8A,
  49     0x88,0x86,0x85,0x83,0x81,0x7F,0x7E,0x7C,0x7A,0x78,
  50     0x76,0x74,0x73,0x71,0x6F,0x6D,0x6B,0x69,0x67,0x65
  51 };
  52
  53
  54
  55 /* Driver stuff */
  56 static unsigned MaxX;
  57 static unsigned MaxY;
  58
  59
  60
  61 /*****************************************************************************/
  62 /*                                   Code                                    */
  63 /*****************************************************************************/
  64
  65
  66
  67 static void CheckError (const char* S)
  68 {
  69     unsigned char Error = tgi_geterror ();
  70     if (Error != TGI_ERR_OK) {
  71         printf ("%s: %d\n", S, Error);
  72         exit (EXIT_FAILURE);
  73     }
  74 }
  75
  76
  77
  78 static void DoWarning (void)
  79 /* Warn the user that the TGI driver is needed for this program */
  80 {
  81     printf ("Warning: This program needs the TGI\n"
  82             "driver on disk! Press 'y' if you have\n"
  83             "it - any other key exits.\n");
  84     if (tolower (cgetc ()) != 'y') {
  85         exit (EXIT_SUCCESS);
  86     }
  87     printf ("Ok. Please wait patiently...\n");
  88 }
  89
  90
  91
  92 static void DoCircles (void)
  93 {
  94     static const unsigned char Palette[2] = { COLOR_WHITE, COLOR_ORANGE };
  95     unsigned char I;
  96     unsigned char Color = COLOR_FORE;
  97     unsigned X = MaxX / 2;
  98     unsigned Y = MaxY / 2;
  99
 100     tgi_setpalette (Palette);
 101     while (!kbhit ()) {
 102         tgi_setcolor (COLOR_FORE);
 103         tgi_line (0, 0, MaxX, MaxY);
 104         tgi_line (0, MaxY, MaxX, 0);
 105         tgi_setcolor (Color);
 106         for (I = 10; I < 240; I += 10) {
 107             tgi_circle (X, Y, I);
 108         }
 109         Color = Color == COLOR_FORE ? COLOR_BACK : COLOR_FORE;
 110     }
 111
 112     cgetc ();
 113     tgi_clear ();
 114 }
 115
 116
 117
 118 static void DoCheckerboard (void)
 119 {
 120     static const unsigned char Palette[2] = { COLOR_WHITE, COLOR_BLACK };
 121     unsigned X, Y;
 122     unsigned char Color;
 123
 124     tgi_setpalette (Palette);
 125     Color = COLOR_BACK;
 126     while (1) {
 127         for (Y = 0; Y <= MaxY; Y += 10) {
 128             for (X = 0; X <= MaxX; X += 10) {
 129                 tgi_setcolor (Color);
 130                 tgi_bar (X, Y, X+9, Y+9);
 131                 Color = Color == COLOR_FORE ? COLOR_BACK : COLOR_FORE;
 132                 if (kbhit ()) {
 133                     cgetc ();
 134                     tgi_clear ();
 135                     return;
 136                 }
 137             }
 138             Color = Color == COLOR_FORE ? COLOR_BACK : COLOR_FORE;
 139         }
 140         Color = Color == COLOR_FORE ? COLOR_BACK : COLOR_FORE;
 141     }
 142 }
 143
 144
 145
 146 static void DoDiagram (void)
 147 {
 148     static const unsigned char Palette[2] = { COLOR_WHITE, COLOR_BLACK };
 149     unsigned X, I;
 150
 151     tgi_setpalette (Palette);
 152     tgi_setcolor (COLOR_FORE);
 153     tgi_line (10, 10, 10, MaxY-10);
 154     tgi_lineto (MaxX-10, MaxY-10);
 155     tgi_line (8, 12, 10, 10);
 156     tgi_lineto (12, 12);
 157     tgi_line (MaxX-12, MaxY-12, MaxX-10, MaxY-10);
 158     tgi_lineto (MaxX-12, MaxY-8);
 159     for (I = 0, X = 10; X < MaxX-10; ++X) {
 160         tgi_setpixel (X, SinusTable[I]);
 161         if (++I >= sizeof (SinusTable)) {
 162             I = 0;
 163         }
 164     }
 165
 166     cgetc ();
 167     tgi_clear ();
 168 }
 169
 170
 171
 172 static void DoLines (void)
 173 {
 174     static const unsigned char Palette[2] = { COLOR_WHITE, COLOR_BLACK };
 175     unsigned X;
 176
 177     tgi_setpalette (Palette);
 178     tgi_setcolor (COLOR_FORE);
 179
 180     for (X = 0; X <= MaxY; X += 10) {
 181         tgi_line (0, 0, MaxY, X);
 182         tgi_line (0, 0, X, MaxY);
 183         tgi_line (MaxY, MaxY, 0, MaxY-X);
 184         tgi_line (MaxY, MaxY, MaxY-X, 0);
 185     }
 186
 187     cgetc ();
 188     tgi_clear ();
 189 }
 190
 191
 192
 193 int main (void)
 194 {
 195     unsigned char Border;
 196
 197     /* Warn the user that the tgi driver is needed */
 198     DoWarning ();
 199
 200     /* Load and initialize the driver */
 201     tgi_load_driver (tgi_stddrv);
 202     CheckError ("tgi_load");
 203     tgi_init ();
 204     CheckError ("tgi_init");
 205
 206     /* Get stuff from the driver */
 207     MaxX = tgi_getmaxx ();
 208     MaxY = tgi_getmaxy ();
 209
 210     /* Set the palette, set the border color */
 211     Border = bordercolor (COLOR_BLACK);
 212
 213     /* Do graphics stuff */
 214     DoCircles ();
 215     DoCheckerboard ();
 216     DoDiagram ();
 217     DoLines ();
 218
 219     /* Unload the driver */
 220     tgi_unload ();
 221
 222     /* Reset the border */
 223     (void) bordercolor (Border);
 224
 225     /* Done */
 226     printf ("Done\n");
 227     return EXIT_SUCCESS;
 228 }