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uxn11
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Fixed UB in screen

This commit is contained in:
Devine Lu Linvega 2024-02-14 08:59:12 -08:00
parent 8f1766f096
commit fa4da132b9
2 changed files with 3 additions and 3 deletions
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4
src/devices/screen.c
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@ -31,8 +31,8 @@ screen_2bpp(Uint8 *layer, Uint8 *addr, Uint16 x1, Uint16 y1, Uint16 color, int f
int row, w = uxn_screen.width, h = uxn_screen.height, opaque = (color % 5); int row, w = uxn_screen.width, h = uxn_screen.height, opaque = (color % 5);
Uint16 y, ymod = (fy < 0 ? 7 : 0), ymax = y1 + ymod + fy * 8; Uint16 y, ymod = (fy < 0 ? 7 : 0), ymax = y1 + ymod + fy * 8;
Uint16 x, xmod = (fx > 0 ? 7 : 0), xmax = x1 + xmod - fx * 8; Uint16 x, xmod = (fx > 0 ? 7 : 0), xmax = x1 + xmod - fx * 8;
for(y = y1 + ymod; y != ymax; y += fy) { for(y = y1 + ymod; y != ymax; y += fy, addr++) {
int c = *addr++ | (*(addr + 7) << 8); int c = (addr[8] << 8) | addr[0];
if(y < h) if(y < h)
for(x = x1 + xmod, row = y * w; x != xmax; x -= fx, c >>= 1) { for(x = x1 + xmod, row = y * w; x != xmax; x -= fx, c >>= 1) {
Uint8 ch = (c & 1) | ((c >> 7) & 2); Uint8 ch = (c & 1) | ((c >> 7) & 2);

2
src/uxn11.c
View File

@ -270,7 +270,7 @@ main(int argc, char **argv)
return 0; return 0;
} }
if(argv[i][0] == '-' && argv[i][1] == 'v') { if(argv[i][0] == '-' && argv[i][1] == 'v') {
fprintf(stdout, "Uxn11 - Varvara Emulator, 20 Jan 2023.\n"); fprintf(stdout, "Uxn11 - Varvara Emulator, 14 Feb 2023.\n");
i++; i++;
} }
if(!system_boot(&u, (Uint8 *)calloc(0x10000 * RAM_PAGES, sizeof(Uint8)), argv[i++])) { if(!system_boot(&u, (Uint8 *)calloc(0x10000 * RAM_PAGES, sizeof(Uint8)), argv[i++])) {