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

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <conio.h>
   4 #include <modload.h>
   5 #include <tgi.h>
   6
   7
   8
   9
  10
  11 /*****************************************************************************/
  12 /*                                   Data                                    */
  13 /*****************************************************************************/
  14
  15
  16
  17 static const unsigned char SinusTable[] = {
  18     0x64,0x63,0x61,0x5F,0x5D,0x5B,0x59,0x57,0x55,0x54,
  19     0x52,0x50,0x4E,0x4C,0x4A,0x49,0x47,0x45,0x43,0x42,
  20     0x40,0x3E,0x3C,0x3B,0x39,0x38,0x36,0x34,0x33,0x31,
  21     0x30,0x2E,0x2D,0x2B,0x2A,0x28,0x27,0x26,0x24,0x23,
  22     0x22,0x20,0x1F,0x1E,0x1D,0x1C,0x1B,0x1A,0x19,0x18,
  23     0x17,0x16,0x15,0x14,0x13,0x12,0x12,0x11,0x10,0x10,
  24     0x0F,0x0E,0x0E,0x0D,0x0D,0x0C,0x0C,0x0C,0x0B,0x0B,
  25     0x0B,0x0B,0x0B,0x0B,0x0B,0x0A,0x0B,0x0B,0x0B,0x0B,
  26     0x0B,0x0B,0x0B,0x0C,0x0C,0x0C,0x0D,0x0D,0x0E,0x0E,
  27     0x0F,0x10,0x10,0x11,0x12,0x12,0x13,0x14,0x15,0x16,
  28     0x17,0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,0x20,
  29     0x22,0x23,0x24,0x26,0x27,0x28,0x2A,0x2B,0x2D,0x2E,
  30     0x30,0x31,0x33,0x34,0x36,0x38,0x39,0x3B,0x3C,0x3E,
  31     0x40,0x42,0x43,0x45,0x47,0x49,0x4A,0x4C,0x4E,0x50,
  32     0x52,0x54,0x55,0x57,0x59,0x5B,0x5D,0x5F,0x61,0x63,
  33     0x64,0x65,0x67,0x69,0x6B,0x6D,0x6F,0x71,0x73,0x74,
  34     0x76,0x78,0x7A,0x7C,0x7E,0x7F,0x81,0x83,0x85,0x86,
  35     0x88,0x8A,0x8C,0x8D,0x8F,0x91,0x92,0x94,0x95,0x97,
  36     0x98,0x9A,0x9B,0x9D,0x9E,0xA0,0xA1,0xA2,0xA4,0xA5,
  37     0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,
  38     0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB6,0xB7,0xB8,0xB8,
  39     0xB9,0xBA,0xBA,0xBB,0xBB,0xBC,0xBC,0xBC,0xBD,0xBD,
  40     0xBD,0xBD,0xBD,0xBD,0xBD,0xBE,0xBD,0xBD,0xBD,0xBD,
  41     0xBD,0xBD,0xBD,0xBC,0xBC,0xBC,0xBB,0xBB,0xBA,0xBA,
  42     0xB9,0xB8,0xB8,0xB7,0xB6,0xB6,0xB5,0xB4,0xB3,0xB2,
  43     0xB1,0xB0,0xAF,0xAE,0xAD,0xAC,0xAB,0xAA,0xA9,0xA8,
  44     0xA6,0xA5,0xA4,0xA2,0xA1,0xA0,0x9E,0x9D,0x9B,0x9A,
  45     0x98,0x97,0x95,0x94,0x92,0x91,0x8F,0x8D,0x8C,0x8A,
  46     0x88,0x86,0x85,0x83,0x81,0x7F,0x7E,0x7C,0x7A,0x78,
  47     0x76,0x74,0x73,0x71,0x6F,0x6D,0x6B,0x69,0x67,0x65
  48 };
  49
  50
  51
  52 /* Driver stuff */
  53 static unsigned XRes;
  54 static unsigned YRes;
  55
  56
  57
  58 /*****************************************************************************/
  59 /*                                   Code                                    */
  60 /*****************************************************************************/
  61
  62
  63
  64 static void CheckError (const char* S)
  65 {
  66     unsigned char Error = tgi_geterror ();
  67     if (Error != TGI_ERR_OK) {
  68         printf ("%s: %d\n", S, Error);
  69         exit (EXIT_FAILURE);
  70     }
  71 }
  72
  73
  74 static void DoWarning (void)
  75 /* Warn the user that the TGI driver is needed for this program */
  76 {
  77     printf ("Warning: This program needs the TGI\n"
  78             "driver on disk! Press 'y' if you have\n"
  79             "it - any other key exits.\n");
  80     if (cgetc () != 'y') {
  81         exit (EXIT_SUCCESS);
  82     }
  83     printf ("Ok. Please wait patiently...\n");
  84 }
  85
  86
  87
  88 static void DoCircles (void)
  89 {
  90     static const unsigned char Palette[2] = { COLOR_WHITE, COLOR_LIGHTRED };
  91     unsigned char I;
  92     unsigned char Color = 1;
  93     unsigned X = XRes / 2;
  94     unsigned Y = YRes / 2;
  95
  96     tgi_setpalette (Palette);
  97     while (!kbhit ()) {
  98         tgi_setcolor (1);
  99         tgi_line (0, 0, XRes-1, YRes-1);
 100         tgi_line (0, YRes-1, XRes-1, 0);
 101         tgi_setcolor (Color);
 102         for (I = 10; I < 240; I += 10) {
 103             tgi_circle (X, Y, I);
 104         }
 105         Color ^= 0x01;
 106     }
 107
 108     cgetc ();
 109     tgi_clear ();
 110 }
 111
 112
 113
 114 static void DoCheckerboard (void)
 115 {
 116     static const unsigned char Palette[2] = { COLOR_WHITE, COLOR_BLACK };
 117     unsigned X, Y;
 118     unsigned char Color;
 119
 120     tgi_setpalette (Palette);
 121     Color = 0;
 122     while (1) {
 123         for (Y = 0; Y < YRes; Y += 10) {
 124             for (X = 0; X < XRes; X += 10) {
 125                 tgi_setcolor (Color);
 126                 tgi_bar (X, Y, X+9, Y+9);
 127                 Color ^= 0x01;
 128                 if (kbhit ()) {
 129                     cgetc ();
 130                     tgi_clear ();
 131                     return;
 132                 }
 133             }
 134             Color ^= 0x01;
 135         }
 136         Color ^= 0x01;
 137     }
 138 }
 139
 140
 141
 142 static void DoDiagram (void)
 143 {
 144     static const unsigned char Palette[2] = { COLOR_WHITE, COLOR_BLACK };
 145     unsigned X, I;
 146
 147     tgi_setpalette (Palette);
 148     tgi_setcolor (1);
 149     tgi_line (10, 10, 10, YRes-10);
 150     tgi_lineto (XRes-10, YRes-10);
 151     tgi_line (8, 12, 10, 10);
 152     tgi_lineto (12, 12);
 153     tgi_line (XRes-12, YRes-12, XRes-10, YRes-10);
 154     tgi_lineto (XRes-12, YRes-8);
 155     for (I = 0, X = 10; X < XRes-10; ++X) {
 156         tgi_setpixel (X, SinusTable[I]);
 157         if (++I >= sizeof (SinusTable)) {
 158             I = 0;
 159         }
 160     }
 161
 162     cgetc ();
 163     tgi_clear ();
 164 }
 165
 166
 167
 168 static void DoLines (void)
 169 {
 170     static const unsigned char Palette[2] = { COLOR_WHITE, COLOR_BLACK };
 171     unsigned X;
 172
 173     tgi_setpalette (Palette);
 174     tgi_setcolor (1);
 175
 176     for (X = 0; X < YRes; X+=10) {
 177         tgi_line (0, 0, YRes, X);
 178         tgi_line (0, 0, X, YRes);
 179         tgi_line (YRes, YRes, 0, YRes-X);
 180         tgi_line (YRes, YRes, YRes-X, 0);
 181     }
 182
 183     cgetc ();
 184     tgi_clear ();
 185 }
 186
 187
 188
 189 int main (void)
 190 {
 191     unsigned char Border;
 192
 193     /* Warn the user that the tgi driver is needed */
 194     DoWarning ();
 195
 196     /* Load and initialize the driver */
 197     tgi_load (TGI_MODE_320_200_2);
 198     CheckError ("tgi_load");
 199     tgi_init ();
 200     CheckError ("tgi_init");
 201
 202     /* Get stuff from the driver */
 203     XRes = tgi_getxres ();
 204     YRes = tgi_getyres ();
 205
 206     /* Set the palette, set the border color */
 207     Border = bordercolor (COLOR_BLACK);
 208
 209     /* Do graphics stuff */
 210     DoCircles ();
 211     DoCheckerboard ();
 212     DoDiagram ();
 213     DoLines ();
 214
 215     /* Unload the driver */
 216     tgi_unload ();
 217
 218     /* Reset the border */
 219     bordercolor (Border);
 220
 221     /* Done */
 222     printf ("Done\n");
 223     return EXIT_SUCCESS;
 224 }
 225
 226