11 /*****************************************************************************/
13 /*****************************************************************************/
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
58 /*****************************************************************************/
60 /*****************************************************************************/
64 static void CheckError (const char* S)
66 unsigned char Error = tgi_geterror ();
67 if (Error != TGI_ERR_OK) {
68 printf ("%s: %d\n", S, Error);
74 static void DoWarning (void)
75 /* Warn the user that the TGI driver is needed for this program */
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') {
83 printf ("Ok. Please wait patiently...\n");
88 static void DoCircles (void)
90 static const unsigned char Palette[2] = { COLOR_WHITE, COLOR_LIGHTRED };
92 unsigned char Color = 1;
93 unsigned X = XRes / 2;
94 unsigned Y = YRes / 2;
96 tgi_setpalette (Palette);
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);
114 static void DoCheckerboard (void)
116 static const unsigned char Palette[2] = { COLOR_WHITE, COLOR_BLACK };
120 tgi_setpalette (Palette);
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);
142 static void DoDiagram (void)
144 static const unsigned char Palette[2] = { COLOR_WHITE, COLOR_BLACK };
147 tgi_setpalette (Palette);
149 tgi_line (10, 10, 10, YRes-10);
150 tgi_lineto (XRes-10, YRes-10);
151 tgi_line (8, 12, 10, 10);
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)) {
168 static void DoLines (void)
170 static const unsigned char Palette[2] = { COLOR_WHITE, COLOR_BLACK };
173 tgi_setpalette (Palette);
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);
191 unsigned char Border;
193 /* Warn the user that the tgi driver is needed */
196 /* Load and initialize the driver */
197 tgi_load (TGI_MODE_320_200_2);
198 CheckError ("tgi_load");
200 CheckError ("tgi_init");
202 /* Get stuff from the driver */
203 XRes = tgi_getxres ();
204 YRes = tgi_getyres ();
206 /* Set the palette, set the border color */
207 Border = bordercolor (COLOR_BLACK);
209 /* Do graphics stuff */
215 /* Unload the driver */
218 /* Reset the border */
219 bordercolor (Border);