Canithesis/allegro_qoi
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This commit is contained in:
Brett Bergstrom
2025-09-08 20:58:18 -05:00
parent f26b831fc9
commit a700dbda74
4 changed files with 33 additions and 2 deletions
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24
LICENSE Normal file
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@@ -0,0 +1,24 @@
allegro_qoi
Copyright © 2025 Canithesis Interactive
Uses code from qoi.h
Copyright (c) 2022 Dominic Szablewski
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice (including the next
paragraph) shall be included in all copies or substantial portions of the
Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

2
allegro_qoi.c
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@@ -36,7 +36,7 @@ ALLEGRO_BITMAP* _al_load_qoi_f(ALLEGRO_FILE* file, int flags) {
ALLEGRO_BITMAP* bmp = al_create_bitmap(meta.width, meta.height); ALLEGRO_BITMAP* bmp = al_create_bitmap(meta.width, meta.height);
ALLEGRO_LOCKED_REGION* lock = al_lock_bitmap( ALLEGRO_LOCKED_REGION* lock = al_lock_bitmap(
bmp, fmt, bmp, fmt,
ALLEGRO_LOCK_READWRITE ALLEGRO_LOCK_WRITEONLY
); );
al_set_new_bitmap_flags(oldflags); al_set_new_bitmap_flags(oldflags);
if (!lock) return NULL; if (!lock) return NULL;

9
sample.c
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@@ -1,6 +1,6 @@
// This program simply loads a QOI file into Allegro // This program simply loads a QOI file into Allegro
// as a texture and then dumps the texture data as a PNG. // as a texture and then dumps the texture data as a PNG.
// Take notice of lines 26 and 27. You only need to initialize // Take notice of lines 32 and 33. You only need to initialize
// the QOI plugin (this registers the function hooks that Allegro // the QOI plugin (this registers the function hooks that Allegro
// will use whenever you want to I/O on a filename ending in .qoi) // will use whenever you want to I/O on a filename ending in .qoi)
// //
@@ -21,10 +21,17 @@ int main(int argc, char **argv) {
printf("Usage: sample <filename>\n"); printf("Usage: sample <filename>\n");
return 0; return 0;
} }
al_init(); al_init();
al_init_image_addon(); al_init_image_addon();
al_init_qoi(); al_init_qoi();
// We don't want to multiply color by alpha because
// we're writing back to another image here, in a
// game you would leave this flag unset.
al_set_new_bitmap_flags(ALLEGRO_NO_PREMULTIPLIED_ALPHA);
ALLEGRO_BITMAP* bmp = al_load_bitmap(argv[1]); ALLEGRO_BITMAP* bmp = al_load_bitmap(argv[1]);
al_save_bitmap("out.png", bmp); al_save_bitmap("out.png", bmp);
return 0; return 0;
} }

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sample_AlphaMultiply.qoi Normal file
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