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Flipped background tiles

This commit is contained in:
Jeffrey Pfau 2013-04-25 22:03:15 -07:00
parent a1910206c0
commit f91149e30f
1 changed files with 18 additions and 4 deletions
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22
src/gba/renderers/video-software.c
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@ -342,6 +342,9 @@ static void _drawBackgroundMode0(struct GBAVideoSoftwareRenderer* renderer, stru
yBase += (inY & 0x100) << 1;
}
int localX;
int localY;
unsigned xBase;
uint32_t screenBase;
@ -351,15 +354,26 @@ static void _drawBackgroundMode0(struct GBAVideoSoftwareRenderer* renderer, stru
if (renderer->flags[outX].finalized) {
continue;
}
xBase = (outX + inX) & 0xF8;
localX = outX + inX;
xBase = localX & 0xF8;
if (background->size & 1) {
xBase += ((outX + inX) & 0x100) << 5;
xBase += (localX & 0x100) << 5;
}
screenBase = (background->screenBase >> 1) + (xBase >> 3) + (yBase << 2);
mapData.packed = renderer->d.vram[screenBase];
charBase = ((background->charBase + (mapData.tile << 5)) >> 1) + ((inY & 0x7) << 1) + (((outX + inX) >> 2) & 1);
if (!mapData.vflip) {
localY = inY & 0x7;
} else {
localY = 7 - (inY & 0x7);
}
if (!mapData.hflip) {
localX = localX & 0x7;
} else {
localX = 7 - (localX & 0x7);
}
charBase = ((background->charBase + (mapData.tile << 5)) >> 1) + (localY << 1) + ((localX >> 2) & 1);
uint16_t tileData = renderer->d.vram[charBase];
tileData >>= ((outX + inX) & 0x3) << 2;
tileData >>= (localX & 0x3) << 2;
if (tileData & 0xF) {
struct PixelFlags flags = {
.target1 = background->target1,