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Restructure background drawing code for multipalette

This commit is contained in:
Jeffrey Pfau 2013-04-26 23:59:50 -07:00
parent 1ff337c6fc
commit f7922c1627
1 changed files with 71 additions and 45 deletions
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116
src/gba/renderers/video-software.c
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@ -309,11 +309,8 @@ static void _composite(struct GBAVideoSoftwareRenderer* renderer, int offset, ui
if (renderer->blendEffect == BLEND_NONE || (!flags.target1 && !flags.target2)) {
renderer->row[offset] = color;
renderer->flags[offset].finalized = 1;
} else if (renderer->blendEffect == BLEND_BRIGHTEN) {
renderer->row[offset] = _brighten(color, renderer->bldy);
renderer->flags[offset].finalized = 1;
} else if (renderer->blendEffect == BLEND_DARKEN) {
renderer->row[offset] = _darken(color, renderer->bldy);
} else if (renderer->blendEffect == BLEND_BRIGHTEN || renderer->blendEffect == BLEND_DARKEN) {
renderer->row[offset] = color;
renderer->flags[offset].finalized = 1;
} else if (renderer->blendEffect == BLEND_ALPHA) {
if (renderer->flags[offset].written) {
@ -332,6 +329,67 @@ static void _composite(struct GBAVideoSoftwareRenderer* renderer, int offset, ui
renderer->flags[offset].written = 1;
}
#define BACKGROUND_DRAW_PIXEL_16 \
{ \
uint16_t color; \
charBase = ((background->charBase + (mapData.tile << 5)) >> 1) + (localY << 1) + ((localX >> 2) & 1); \
uint16_t tileData = renderer->d.vram[charBase]; \
tileData >>= (localX & 0x3) << 2; \
if (renderer->blendEffect == BLEND_NONE || renderer->blendEffect == BLEND_ALPHA) { \
color = renderer->d.palette[(tileData & 0xF) | (mapData.palette << 4)]; \
} else { \
color = renderer->variantPalette[(tileData & 0xF) | (mapData.palette << 4)]; \
} \
if (tileData & 0xF) { \
_composite(renderer, outX, color, flags); \
} \
}
#define BACKGROUND_DRAW_PIXEL_256 \
{ \
uint16_t color; \
charBase = ((background->charBase + (mapData.tile << 6)) >> 1) + (localY << 2) + ((localX >> 1) & 3); \
uint16_t tileData = renderer->d.vram[charBase]; \
tileData >>= (localX & 0x1) << 3; \
if (renderer->blendEffect == BLEND_NONE || renderer->blendEffect == BLEND_ALPHA) { \
color = renderer->d.palette[tileData & 0xFF]; \
} else if (renderer->blendEffect == BLEND_DARKEN) { \
color = _darken(renderer->d.palette[tileData & 0xFF], renderer->bldy); \
} else if (renderer->blendEffect == BLEND_BRIGHTEN) { \
color = _brighten(renderer->d.palette[tileData & 0xFF], renderer->bldy); \
} \
if (tileData & 0xFF) { \
_composite(renderer, outX, color, flags); \
} \
}
#define BACKGROUND_TEXT_SELECT_CHARACTER \
{ \
if (renderer->flags[outX].finalized) { \
continue; \
} \
localX = outX + inX; \
xBase = localX & 0xF8; \
if (background->size & 1) { \
xBase += (localX & 0x100) << 5; \
} \
if (oldXBase != xBase) { \
oldXBase = xBase; \
screenBase = (background->screenBase >> 1) + (xBase >> 3) + (yBase << 2); \
mapData.packed = renderer->d.vram[screenBase]; \
if (!mapData.vflip) { \
localY = inY & 0x7; \
} else { \
localY = 7 - (inY & 0x7); \
} \
} \
if (!mapData.hflip) { \
localX = localX & 0x7; \
} else { \
localX = 7 - (localX & 0x7); \
} \
}
static void _drawBackgroundMode0(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* background, int y) {
int start = 0;
int end = VIDEO_HORIZONTAL_PIXELS;
@ -353,7 +411,6 @@ static void _drawBackgroundMode0(struct GBAVideoSoftwareRenderer* renderer, stru
uint32_t screenBase;
uint32_t charBase;
uint16_t tileData;
struct PixelFlags flags = {
.target1 = background->target1,
.target2 = background->target2,
@ -362,46 +419,15 @@ static void _drawBackgroundMode0(struct GBAVideoSoftwareRenderer* renderer, stru
unsigned int oldXBase = 1;
for (int outX = start; outX < end; ++outX) {
if (renderer->flags[outX].finalized) {
continue;
if (!background->multipalette) {
for (int outX = start; outX < end; ++outX) {
BACKGROUND_TEXT_SELECT_CHARACTER;
BACKGROUND_DRAW_PIXEL_16;
}
localX = outX + inX;
xBase = localX & 0xF8;
if (background->size & 1) {
xBase += (localX & 0x100) << 5;
}
if (oldXBase != xBase) {
oldXBase = xBase;
screenBase = (background->screenBase >> 1) + (xBase >> 3) + (yBase << 2);
mapData.packed = renderer->d.vram[screenBase];
if (!mapData.vflip) {
localY = inY & 0x7;
} else {
localY = 7 - (inY & 0x7);
}
}
if (!mapData.hflip) {
localX = localX & 0x7;
} else {
localX = 7 - (localX & 0x7);
}
if (!background->multipalette) {
charBase = ((background->charBase + (mapData.tile << 5)) >> 1) + (localY << 1) + ((localX >> 2) & 1);
tileData = renderer->d.vram[charBase];
tileData >>= (localX & 0x3) << 2;
uint16_t color = renderer->d.palette[(tileData & 0xF) | (mapData.palette << 4)];
if (tileData & 0xF) {
_composite(renderer, outX, color, flags);
}
} else {
charBase = ((background->charBase + (mapData.tile << 6)) >> 1) + (localY << 2) + ((localX >> 1) & 3);
tileData = renderer->d.vram[charBase];
tileData >>= (localX & 0x1) << 3;
uint16_t color = renderer->d.palette[tileData & 0xFF];
if (tileData & 0xFF) {
_composite(renderer, outX, color, flags);
}
} else {
for (int outX = start; outX < end; ++outX) {
BACKGROUND_TEXT_SELECT_CHARACTER;
BACKGROUND_DRAW_PIXEL_256;
}
}
}