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fixes for scaling performance

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This commit is contained in:
Sebastian Krzyszkowiak 2012-03-01 22:34:19 +01:00
parent 535f5abc94
commit 334adcf9c0
1 changed files with 7 additions and 3 deletions
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10
src/main.c
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@ -128,9 +128,11 @@ void ScaleBitmap(ALLEGRO_BITMAP* source, int width, int height, float val) {
return; return;
} }
int x, y; int x, y;
for (y = 0; y <= height; y++) { al_lock_bitmap(al_get_target_bitmap(), ALLEGRO_PIXEL_FORMAT_ANY, ALLEGRO_LOCK_WRITEONLY);
al_lock_bitmap(source, ALLEGRO_PIXEL_FORMAT_ANY, ALLEGRO_LOCK_READONLY);
for (y = 0; y < height; y++) {
float pixy = ((float)y / height) * al_get_bitmap_height(source); float pixy = ((float)y / height) * al_get_bitmap_height(source);
for (x = 0; x <= width; x++) { for (x = 0; x < width; x++) {
float pixx = ((float)x / width) * al_get_bitmap_width(source); float pixx = ((float)x / width) * al_get_bitmap_width(source);
ALLEGRO_COLOR a = al_get_pixel(source, pixx-val, pixy-val); ALLEGRO_COLOR a = al_get_pixel(source, pixx-val, pixy-val);
ALLEGRO_COLOR b = al_get_pixel(source, pixx+val, pixy-val); ALLEGRO_COLOR b = al_get_pixel(source, pixx+val, pixy-val);
@ -142,9 +144,11 @@ void ScaleBitmap(ALLEGRO_BITMAP* source, int width, int height, float val) {
(a.b+b.g+c.b+d.b) / 4, (a.b+b.g+c.b+d.b) / 4,
(a.a+b.a+c.a+d.a) / 4 (a.a+b.a+c.a+d.a) / 4
); );
al_draw_pixel(x, y, result); al_put_pixel(x, y, result);
} }
} }
al_unlock_bitmap(al_get_target_bitmap());
al_unlock_bitmap(source);
} }
ALLEGRO_BITMAP* LoadFromCache(struct Game *game, char* filename, int width, int height) { ALLEGRO_BITMAP* LoadFromCache(struct Game *game, char* filename, int width, int height) {