Canithesis/allegro_schrift
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it almost works

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This commit is contained in:
Brett Bergstrom
2026-09-21 16:55:20 -05:00
parent f2052c3851
commit 4ee3a4dd17
1 changed files with 18 additions and 16 deletions
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34
allegro_schrift.c
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@@ -161,22 +161,6 @@ ALLEGRO_FONT *al_load_ttf_font_f(ALLEGRO_FILE *file,
al_unlock_bitmap(gtex);
ALLEGRO_INFO("blit raster to vram\n");
block = al_lock_bitmap(gtex, ALLEGRO_PIXEL_FORMAT_RGBA_8888, ALLEGRO_LOCK_WRITEONLY);
assert(block->pixel_size == 4);
const unsigned int gtexw = al_get_bitmap_width(gtex), gtexh = al_get_bitmap_height(gtex);
unsigned int pixiw = 0, pixih = 0, pixi = 0;
while (pixi < gtexh * gtexw) {
uint32_t* pixel = (uint32_t*)((uint8_t*)block->data + (block->pitch * pixih)) + pixiw; // fixme
*pixel = (*pixel & 0xffu) * 0x01010101u;
pixi++;
if (pixiw++ >= gtexw) {
pixiw = 0;
pixih++;
}
}
al_unlock_bitmap(gtex);
ALLEGRO_INFO("converted colors\n");
woff += geom.minWidth + 1;
i++; continue;
@@ -189,6 +173,24 @@ ALLEGRO_FONT *al_load_ttf_font_f(ALLEGRO_FILE *file,
FAIL;
}
// a shader would be better, but we don't know the target platform.
ALLEGRO_LOCKED_REGION *glock = al_lock_bitmap(gtex, ALLEGRO_PIXEL_FORMAT_ABGR_8888, ALLEGRO_LOCK_READWRITE);
assert(glock->pixel_size == 4);
const unsigned int gtexw = al_get_bitmap_width(gtex), gtexh = al_get_bitmap_height(gtex);
unsigned int pixiw = 0, pixih = 0, pixi = 0;
while (pixi < gtexh * gtexw) {
uint32_t* pixel = (uint32_t*)((uint8_t*)glock->data + (glock->pitch * (signed)pixih)) + pixiw; // fixme
if (*pixel == 0xFFFF0000) *pixel = 0xFF000000;
else *pixel = (*pixel & 0xffu) * 0x01010101u;
pixi++; pixiw++;
if (pixiw >= gtexw) {
pixiw = 0;
pixih++;
}
}
al_unlock_bitmap(gtex);
ALLEGRO_INFO("converted colors\n");
// debug
al_save_bitmap("schrift_test.png", gtex);