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Fix sse blitting when bounds are weird

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This commit is contained in:
K. Lange 2018-09-12 13:38:58 +09:00
parent c161bce0ac
commit 21b3fdf242
1 changed files with 6 additions and 2 deletions
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8
lib/graphics.c
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@ -467,15 +467,19 @@ void draw_sprite(gfx_context_t * ctx, sprite_t * sprite, int32_t x, int32_t y) {
uint16_t _x = 0;
/* Ensure alignment */
for (; _x < sprite->width && ((uintptr_t)&GFX(ctx, x + _x, y + _y) & 15); ++_x) {
for (; _x < sprite->width; ++_x) {
if (x + _x < _left || x + _x > _right || y + _y < _top || y + _y > _bottom)
continue;
if (!((uintptr_t)&GFX(ctx, x + _x, y + _y) & 15))
break;
GFX(ctx, x + _x, y + _y) = alpha_blend_rgba(GFX(ctx, x + _x, y + _y), SPRITE(sprite, _x, _y));
}
for (; _x < sprite->width - 3; _x += 4) {
if (x + _x < _left || x + _x + 3 > _right || y + _y < _top || y + _y > _bottom) {
if (x + _x < _left || y + _y < _top || y + _y > _bottom) {
continue;
}
if (x + _x + 3 > _right)
break;
__m128i d = _mm_load_si128((void *)&GFX(ctx, x + _x, y + _y));
__m128i s = _mm_loadu_si128((void *)&SPRITE(sprite, _x, _y));