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Start implementing transparency

This commit is contained in:
Jeffrey Pfau 2013-04-22 02:07:35 -07:00
parent e1d5f3f457
commit bcf446737c
1 changed files with 8 additions and 4 deletions
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12
src/gba/renderers/video-software.c
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@ -158,7 +158,7 @@ static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* render
} }
for (int x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) { for (int x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
for (int i = 0; i < 4; ++i) { for (int i = 0; i < 4; ++i) {
if (softwareRenderer->sortedBg[i]->enabled) { if (softwareRenderer->sortedBg[i]->enabled && softwareRenderer->sortedBg[i]->internalBuffer[x] != 0x8000) {
row[x] = softwareRenderer->sortedBg[i]->internalBuffer[x]; row[x] = softwareRenderer->sortedBg[i]->internalBuffer[x];
break; break;
} }
@ -223,7 +223,11 @@ static void _drawBackgroundMode0(struct GBAVideoSoftwareRenderer* renderer, stru
charBase = ((background->charBase + mapData.tile << 5) >> 1) + ((inY & 0x7) << 1) + (((outX + inX) >> 2) & 1); charBase = ((background->charBase + mapData.tile << 5) >> 1) + ((inY & 0x7) << 1) + (((outX + inX) >> 2) & 1);
uint16_t tileData = renderer->d.vram[charBase]; uint16_t tileData = renderer->d.vram[charBase];
tileData >>= ((outX + inX) & 0x3) << 2; tileData >>= ((outX + inX) & 0x3) << 2;
background->internalBuffer[outX] = renderer->d.palette[(tileData & 0xF) | (mapData.palette << 4)]; if (tileData & 0xF) {
background->internalBuffer[outX] = renderer->d.palette[(tileData & 0xF) | (mapData.palette << 4)];
} else {
background->internalBuffer[outX] = 0x8000;
}
} }
} }
@ -235,8 +239,8 @@ static int _backgroundComparator(const void* a, const void* b) {
const struct GBAVideoSoftwareBackground* bgA = *(const struct GBAVideoSoftwareBackground**) a; const struct GBAVideoSoftwareBackground* bgA = *(const struct GBAVideoSoftwareBackground**) a;
const struct GBAVideoSoftwareBackground* bgB = *(const struct GBAVideoSoftwareBackground**) b; const struct GBAVideoSoftwareBackground* bgB = *(const struct GBAVideoSoftwareBackground**) b;
if (bgA->priority != bgB->priority) { if (bgA->priority != bgB->priority) {
return bgB->priority - bgA->priority; return bgA->priority - bgB->priority;
} else { } else {
return bgB->index - bgA->index; return bgA->index - bgB->index;
} }
} }