mirror of https://github.com/datajerk/c2d.git
95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include <strings.h>
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#define MAX 15
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#define NORMAL 0x80
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// unsigned char colors[16] = { 0xF, 0xE, 0xD, 0xC, 0xB, 0xA, 0x9, 0x8, 0x7, 0x6, 0x5, 0x4, 0x3, 0x2, 0x1, 0x0 };
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// chanage order and number of colors for different output
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// default palette
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// unsigned char colors[15] = { 0xE, 0xD, 0xC, 0xB, 0xA, 0x9, 0x8, 0x7, 0x6, 0x5, 0x4, 0x3, 0x2, 0x1, 0x0 };
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// redish
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// unsigned char colors[15] = { 0xB, 0x3, 0x1, 0x9, 0xD, 0xE, 0xB, 0x4, 0x7, 0x6, 0x2, 0xA, 0x5, 0x8, 0x0 };
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// blueish
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unsigned char colors[15] = { 0x2, 0x6, 0x7, 0xE, 0xC, 0x4, 0xD, 0x9, 0xB, 0x3, 0x1, 0xA, 0x5, 0x8, 0x0 };
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const char text[4][41] = {
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"EXAMPLE GR/TEXT SPLASH SCREEN",
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"LOADING GAME SERVER CLIENT...",
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"________________________________________",
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"________________________________________",
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};
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int main(int argc, char **argv)
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{
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int c, r, i, j, k, line = 0;
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double xd, yd, x0, y0, x, y, xt;
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unsigned char screen[24][40];
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// clear screen to zeros
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for (i = 0; i < 24; i++)
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for (j = 0; j < 40; j++)
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screen[i][j] = 0x00;
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c = 40;
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r = 40;
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xd = (1.0 - -2.5) / (double) c; // size of x pixel
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yd = (1.0 - -1.0) / (double) r; // size of y pixel
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// 39 rows, set i = 1
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for (i = 1; i < r; i++) {
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// gr text page translation
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// 40 row
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// line = 3 * ((i / 2) % 8) + i / 16;
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// 39 row
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line = 3 * (((i - 1) / 2) % 8) + (i - 1) / 16;
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y0 = 1 - i * yd;
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for (j = 0; j < c; j++) {
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x0 = -2.5 + j * xd;
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k = x = y = 0;
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while (x * x + y * y <= 4 && k < MAX) {
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xt = x * x - y * y + x0;
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y = 2 * x * y + y0;
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x = xt;
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k++;
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}
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// 39 row
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screen[line][j] |= (colors[(k - 1) / (MAX / sizeof(colors))] << 4 * (i % 2 == 0));
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// 40 row
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//screen[line][j] |= (colors[(k - 1) / (MAX / sizeof(colors))] << 4 * (i % 2));
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}
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}
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// clear text lines with spaces
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for (i = 20; i < 24; i++) {
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line = 3 * (i % 8) + i / 8;
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for (j = 0; j < 40; j++)
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screen[line][j] = ' ' | NORMAL;
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}
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for (i = 0; i < 4; i++) {
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line = 3 * ((i + 20) % 8) + (i + 20) / 8;
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for (j = 0; j < 20 - strlen(text[i]) / 2; j++)
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screen[line][j] = ' ' | NORMAL; // text rows
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for (k = 0; k < strlen(text[i]); k++)
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screen[line][j++] = text[i][k] | NORMAL;
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}
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// dump to stdout
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for (i = 0; i < 24; i++) {
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for (j = 0; j < 40; j++)
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putchar(screen[i][j]);
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if (i % 3 == 2)
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for (k = 0; k < 8; k++)
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putchar(0x0);
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}
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return 0;
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}
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