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graphics: fix bad bounds checks in draw_sprite_alpha*

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This commit is contained in:
K. Lange 2022-08-22 21:12:54 +09:00
parent af69cd6369
commit 9942ec3889
1 changed files with 2 additions and 2 deletions
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4
lib/graphics.c
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@ -816,7 +816,7 @@ void draw_sprite_alpha(gfx_context_t * ctx, const sprite_t * sprite, int32_t x,
for (uint16_t _y = 0; _y < sprite->height; ++_y) {
if (y + _y < _top) continue;
if (y + _y > _bottom) break;
if (y + _y >= _bottom) break;
if (!_is_in_clip(ctx, y + _y)) continue;
for (uint16_t _x = (x < _left) ? _left - x : 0; _x < sprite->width && x + _x < _right; ++_x) {
SPRITE(scanline,_x + x - _left,0) = SPRITE(sprite, _x, _y);
@ -835,7 +835,7 @@ void draw_sprite_alpha_paint(gfx_context_t * ctx, const sprite_t * sprite, int32
int32_t _bottom = min(y + sprite->height, ctx->height);
for (uint16_t _y = 0; _y < sprite->height; ++_y) {
if (y + _y < _top) continue;
if (y + _y > _bottom) break;
if (y + _y >= _bottom) break;
if (!_is_in_clip(ctx, y + _y)) continue;
for (uint16_t _x = (x < _left) ? _left - x : 0; _x < sprite->width && x + _x < _right; ++_x) {
/* Get the alpha from the sprite at this pixel */