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Munching squares

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Toby Jaffey 2025-12-11 23:53:43 +00:00
parent e7485d5972
commit 2d07f6fcc0
1 changed files with 12 additions and 9 deletions
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13
apps/gfx/gfx.c
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@ -5,17 +5,20 @@ uint32_t *framebuffer = (uint32_t *)UVM32_EXTRAM_BASE;
#define HEIGHT 600 #define HEIGHT 600
void main(void) { void main(void) {
uint32_t col = 0x000000FF; uint8_t r = 0, g = 0, b = 0;
uint8_t c = 0;
uint32_t framecount = 0; uint32_t framecount = 0;
while (1) { while (1) {
for (int y = 0; y < HEIGHT; y++) { for (int y = 0; y < HEIGHT; y++) {
for (int x = 0; x < WIDTH; x++) { for (int x = 0; x < WIDTH; x++) {
framebuffer[y*WIDTH+x] = col; r = ((x + framecount) ^ y);
g = (x ^ (y + framecount));
b = (x ^ y);
r += framecount;
g += framecount * 2;
b += framecount * 5;
framebuffer[y * WIDTH + x] = (r << 24) | (g << 16) | (b << 8) | 0xFF;
} }
} }
col = (c << 24) | (c << 16) | (c<<8) | 0xFF;
c++;
printdec(framecount++); printdec(framecount++);
println(""); println("");
} }