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Introduce macros for sprite drawing

This commit is contained in:
Jeffrey Pfau 2013-05-01 23:35:51 -07:00
parent e3fddc5739
commit d6c88fc7cb
1 changed files with 39 additions and 36 deletions
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75
src/gba/renderers/video-software.c
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@ -608,6 +608,36 @@ static const int _objSizes[32] = {
0, 0
};
#define SPRITE_XBASE_16(localX) unsigned xBase = (localX & ~0x7) * 4 + ((localX >> 1) & 2);
#define SPRITE_YBASE_16(localY) unsigned yBase = (localY & ~0x7) * (renderer->dispcnt.objCharacterMapping ? width >> 1 : 0x80) + (localY & 0x7) * 4;
#define SPRITE_DRAW_PIXEL_16(localX) \
uint16_t tileData = renderer->d.vram[(yBase + charBase + xBase) >> 1]; \
tileData = (tileData >> ((localX & 3) << 2)) & 0xF; \
if (tileData) { \
if (renderer->blendEffect == BLEND_NONE || renderer->blendEffect == BLEND_ALPHA || !renderer->target1Obj) { \
renderer->spriteLayer[outX] = renderer->normalPalette[0x100 | tileData | (sprite->palette << 4)]; \
} else { \
renderer->spriteLayer[outX] = renderer->variantPalette[0x100 | tileData | (sprite->palette << 4)]; \
} \
renderer->flags[outX] = flags; \
}
#define SPRITE_XBASE_256(localX) unsigned xBase = (localX & ~0x7) * 8 + (localX & 6);
#define SPRITE_YBASE_256(localY) unsigned yBase = (localY & ~0x7) * (renderer->dispcnt.objCharacterMapping ? width : 0x100) + (localY & 0x7) * 8;
#define SPRITE_DRAW_PIXEL_256(localX) \
uint16_t tileData = renderer->d.vram[(yBase + charBase + xBase) >> 1]; \
tileData = (tileData >> ((localX & 1) << 3)) & 0xFF; \
if (tileData) { \
if (renderer->blendEffect == BLEND_NONE || renderer->blendEffect == BLEND_ALPHA || !renderer->target1Obj) { \
renderer->spriteLayer[outX] = renderer->normalPalette[0x100 | tileData]; \
} else { \
renderer->spriteLayer[outX] = renderer->variantPalette[0x100 | tileData]; \
} \
renderer->flags[outX] = flags; \
}
static void _drawSprite(struct GBAVideoSoftwareRenderer* renderer, struct GBAObj* sprite, int y) {
int width = _objSizes[sprite->shape * 8 + sprite->size * 2];
int height = _objSizes[sprite->shape * 8 + sprite->size * 2 + 1];
@ -632,7 +662,7 @@ static void _drawSprite(struct GBAVideoSoftwareRenderer* renderer, struct GBAObj
}
unsigned charBase = BASE_TILE + sprite->tile * 0x20;
if (!sprite->multipalette) {
unsigned yBase = (inY & ~0x7) * (renderer->dispcnt.objCharacterMapping ? width >> 1 : 0x80) + (inY & 0x7) * 4;
SPRITE_YBASE_16(inY);
for (int outX = x >= start ? x : start; outX < x + width && outX < end; ++outX) {
int inX = outX - x;
if (sprite->hflip) {
@ -641,20 +671,11 @@ static void _drawSprite(struct GBAVideoSoftwareRenderer* renderer, struct GBAObj
if (renderer->flags[outX].isSprite) {
continue;
}
unsigned xBase = (inX & ~0x7) * 4 + ((inX >> 1) & 2);
uint16_t tileData = renderer->d.vram[(yBase + charBase + xBase) >> 1];
tileData = (tileData >> ((inX & 3) << 2)) & 0xF;
if (tileData) {
if (renderer->blendEffect == BLEND_NONE || renderer->blendEffect == BLEND_ALPHA || !renderer->target1Obj) {
renderer->spriteLayer[outX] = renderer->normalPalette[0x100 | tileData | (sprite->palette << 4)];
} else {
renderer->spriteLayer[outX] = renderer->variantPalette[0x100 | tileData | (sprite->palette << 4)];
}
renderer->flags[outX] = flags;
}
SPRITE_XBASE_16(inX);
SPRITE_DRAW_PIXEL_16(inX);
}
} else {
unsigned yBase = (inY & ~0x7) * (renderer->dispcnt.objCharacterMapping ? width : 0x100) + (inY & 0x7) * 8;
SPRITE_YBASE_256(inY);
for (int outX = x >= start ? x : start; outX < x + width && outX < end; ++outX) {
int inX = outX - x;
if (sprite->hflip) {
@ -663,17 +684,8 @@ static void _drawSprite(struct GBAVideoSoftwareRenderer* renderer, struct GBAObj
if (renderer->flags[outX].isSprite) {
continue;
}
unsigned xBase = (inX & ~0x7) * 8 + (inX & 6);
uint16_t tileData = renderer->d.vram[(yBase + charBase + xBase) >> 1];
tileData = (tileData >> ((inX & 1) << 3)) & 0xFF;
if (tileData) {
if (renderer->blendEffect == BLEND_NONE || renderer->blendEffect == BLEND_ALPHA || !renderer->target1Obj) {
renderer->spriteLayer[outX] = renderer->normalPalette[0x100 | tileData];
} else {
renderer->spriteLayer[outX] = renderer->variantPalette[0x100 | tileData];
}
renderer->flags[outX] = flags;
}
SPRITE_XBASE_256(inX);
SPRITE_DRAW_PIXEL_256(inX);
}
}
@ -711,18 +723,9 @@ static void _drawTransformedSprite(struct GBAVideoSoftwareRenderer* renderer, st
continue;
}
unsigned yBase = (localY & ~0x7) * (renderer->dispcnt.objCharacterMapping ? width >> 1 : 0x80) + (localY & 0x7) * 4;
unsigned xBase = (localX & ~0x7) * 4 + ((localX >> 1) & 2);
uint16_t tileData = renderer->d.vram[(yBase + charBase + xBase) >> 1];
tileData = (tileData >> ((localX & 3) << 2)) & 0xF;
if (tileData) {
if (renderer->blendEffect == BLEND_NONE || renderer->blendEffect == BLEND_ALPHA || !renderer->target1Obj) {
renderer->spriteLayer[outX] = renderer->normalPalette[0x100 | tileData | (sprite->palette << 4)];
} else {
renderer->spriteLayer[outX] = renderer->variantPalette[0x100 | tileData | (sprite->palette << 4)];
}
renderer->flags[outX] = flags;
}
SPRITE_YBASE_16(localY);
SPRITE_XBASE_16(localX);
SPRITE_DRAW_PIXEL_16(localX);
}
}