Canithesis/allegro_schrift
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This commit is contained in:
Brett Bergstrom
2026-09-12 08:24:35 -05:00
parent 38daf046ba
commit 217e270ad1
2 changed files with 17 additions and 11 deletions
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2
CMakeLists.txt
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@@ -19,6 +19,8 @@ add_our_addon_library(allegro_ttf
"${FONT_LINK_WITH};${TTF_LIBRARIES}"
)
#target_compile_options(allegro_ttf PRIVATE "-fsanitize=undefined" "-lasan")
install_our_headers(${TTF_INCLUDE_FILES})
add_addon(ttf)

26
glue.c
View File

@@ -56,8 +56,8 @@ ALLEGRO_FONT *al_load_ttf_font_f(ALLEGRO_FILE *file,
const char* cache_text_str =
al_get_config_value(system_cfg, "ttf", "cache_text");
if (!cache_text_str) {
ALLEGRO_ERROR("No characters defined in cache_text, no glyphs to bake!\n", filename);
FAIL;
ALLEGRO_ERROR("No characters defined in cache_text! Using defaults\n");
cache_text_str = "fart";
}
// read font file
@@ -71,8 +71,8 @@ ALLEGRO_FONT *al_load_ttf_font_f(ALLEGRO_FILE *file,
offset += al_fread(file, (uint8_t*)filebuf + offset, chunksize);
}
sft.xScale = size;
sft.yScale = size;
sft.xScale = abs(size);
sft.yScale = abs(size);
sft.font = sft_loadmem(filebuf, filesize);
if (!sft.font) {
ALLEGRO_ERROR("Can't load font %s: schrift error, is it a valid format?\n", filename);
@@ -80,12 +80,13 @@ ALLEGRO_FONT *al_load_ttf_font_f(ALLEGRO_FILE *file,
}
// convert glyphs into textures todo
gtex = al_create_bitmap(2048, 2048);
uint16_t woff = 1, hoff = 0;
uint16_t woff = 1, hoff = 0, hmax = 2048;
gtex = al_create_bitmap(2048, hmax);
al_set_target_bitmap(gtex);
al_clear_to_color(al_map_rgba(0, 0, 0, 255));
unsigned int i = 0;
while (cache_text_str[i] != '\0') {
const unsigned int len = strlen(cache_text_str);
while (i < len) {
ALLEGRO_INFO("generating glyph for %c\n", cache_text_str[i]);
SFT_Glyph glyph;
SFT_GMetrics geom;
@@ -96,14 +97,17 @@ ALLEGRO_FONT *al_load_ttf_font_f(ALLEGRO_FILE *file,
ALLEGRO_INFO("got glyph\n");
if (0 > sft_gmetrics(&sft, glyph, &geom)) goto glyph_lookup_fail;
ALLEGRO_INFO("got geom\n");
//if ((hmax - hoff) < geom.minWidth) {
// todo wrap glyphs, grow bmp
//}
block =
al_lock_bitmap_region(gtex, woff, hoff, geom.minWidth, geom.minHeight,
ALLEGRO_PIXEL_FORMAT_SINGLE_CHANNEL_8, ALLEGRO_LOCK_WRITEONLY);
ALLEGRO_PIXEL_FORMAT_ABGR_8888, ALLEGRO_LOCK_WRITEONLY);
ALLEGRO_INFO("got lock\n");
img.width = geom.minWidth;
img.height = geom.minHeight;
img.pixels = block->data;
if (0 > sft_render(&sft, glyph, img)) goto glyph_lookup_fail;
//if (0 > sft_render(&sft, glyph, img)) goto glyph_lookup_fail; // FIXME UB
ALLEGRO_INFO("got raster\n");
al_unlock_bitmap(gtex);
ALLEGRO_INFO("unlock\n");
@@ -128,8 +132,8 @@ ALLEGRO_FONT *al_load_ttf_font_f(ALLEGRO_FILE *file,
i++; i++;
}
f = al_grab_font_from_bitmap(gtex, ranges_size, ranges);
f->dtor_item = _al_register_destructor(_al_dtor_list, "ttf_font", f,
(void (*)(void *))al_destroy_font);
//f->dtor_item = _al_register_destructor(_al_dtor_list, "ttf_font", f,
// (void (*)(void *))al_destroy_font);
ALLEGRO_DEBUG("Font %s loaded.\n", filename);
CLEANUP;