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GBA Video: Minor mode 2 optimization

This commit is contained in:
Jeffrey Pfau 2015-10-11 23:49:56 -07:00
parent 92849dee1a
commit 642ed65ee2
1 changed files with 43 additions and 15 deletions
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48
src/gba/renderers/software-bg.c
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@ -7,28 +7,41 @@
#include "gba/gba.h"
#define DRAW_BACKGROUND_MODE_2(BLEND, OBJWIN) \
for (outX = renderer->start, pixel = &renderer->row[outX]; outX < renderer->end; ++outX, ++pixel) { \
x += background->dx; \
y += background->dy; \
\
if (!mosaicWait) { \
if (background->overflow) { \
#define MODE_2_COORD_OVERFLOW \
localX = x & (sizeAdjusted - 1); \
localY = y & (sizeAdjusted - 1); \
} else if ((x | y) & ~(sizeAdjusted - 1)) { \
#define MODE_2_COORD_NO_OVERFLOW \
if ((x | y) & ~(sizeAdjusted - 1)) { \
continue; \
} else { \
localX = x; \
localY = y; \
} \
}
#define MODE_2_MOSAIC(COORD) \
if (!mosaicWait) { \
COORD \
mapData = ((uint8_t*)renderer->d.vram)[screenBase + (localX >> 11) + (((localY >> 7) & 0x7F0) << background->size)]; \
pixelData = ((uint8_t*)renderer->d.vram)[charBase + (mapData << 6) + ((localY & 0x700) >> 5) + ((localX & 0x700) >> 8)]; \
\
mosaicWait = mosaicH; \
} else { \
--mosaicWait; \
} \
}
#define MODE_2_NO_MOSAIC(COORD) \
COORD \
mapData = ((uint8_t*)renderer->d.vram)[screenBase + (localX >> 11) + (((localY >> 7) & 0x7F0) << background->size)]; \
pixelData = ((uint8_t*)renderer->d.vram)[charBase + (mapData << 6) + ((localY & 0x700) >> 5) + ((localX & 0x700) >> 8)];
#define MODE_2_LOOP(MOSAIC, COORD, BLEND, OBJWIN) \
for (outX = renderer->start, pixel = &renderer->row[outX]; outX < renderer->end; ++outX, ++pixel) { \
x += background->dx; \
y += background->dy; \
\
MOSAIC(COORD) \
\
uint32_t current = *pixel; \
if (pixelData && IS_WRITABLE(current)) { \
@ -36,6 +49,21 @@
} \
}
#define DRAW_BACKGROUND_MODE_2(BLEND, OBJWIN) \
if (background->overflow) { \
if (mosaicH > 1) { \
MODE_2_LOOP(MODE_2_MOSAIC, MODE_2_COORD_OVERFLOW, BLEND, OBJWIN); \
} else { \
MODE_2_LOOP(MODE_2_NO_MOSAIC, MODE_2_COORD_OVERFLOW, BLEND, OBJWIN); \
} \
} else { \
if (mosaicH > 1) { \
MODE_2_LOOP(MODE_2_MOSAIC, MODE_2_COORD_NO_OVERFLOW, BLEND, OBJWIN); \
} else { \
MODE_2_LOOP(MODE_2_NO_MOSAIC, MODE_2_COORD_NO_OVERFLOW, BLEND, OBJWIN); \
} \
}
void GBAVideoSoftwareRendererDrawBackgroundMode2(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* background, int inY) {
int sizeAdjusted = 0x8000 << background->size;