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GBA Video: Optimize affine iteration

This commit is contained in:
Vicki Pfau 2024-01-10 00:34:29 -08:00
parent 328bebbc01
commit d2e8eaffa4
1 changed files with 18 additions and 12 deletions
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30
src/gba/renderers/software-bg.c
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@ -11,27 +11,25 @@
#define BACKGROUND_BITMAP_ITERATE(W, H) \ #define BACKGROUND_BITMAP_ITERATE(W, H) \
x += background->dx; \ x += background->dx; \
y += background->dy; \ y += background->dy; \
if ((x < 0 || y < 0 || (x >> 8) >= W || (y >> 8) >= H) && !mosaicWait) { \ if (((x | y) < 0 || x >= (W << 8) || y >= (H << 8)) && !mosaicWait) { \
continue; \ continue; \
} \ } \
localX = x; \ localX = x; \
localY = y; localY = y;
#define MODE_2_COORD_OVERFLOW \ #define MODE_2_COORD_OVERFLOW \
localX = x & (sizeAdjusted - 1); \ x &= (sizeAdjusted - 1); \
localY = y & (sizeAdjusted - 1); \ y &= (sizeAdjusted - 1); \
#define MODE_2_COORD_NO_OVERFLOW \ #define MODE_2_COORD_NO_OVERFLOW \
if ((x | y) & ~(sizeAdjusted - 1)) { \ if ((x | y) & ~(sizeAdjusted - 1)) { \
continue; \ continue; \
} \ }
localX = x; \
localY = y;
#define MODE_2_NO_MOSAIC(COORD) \ #define MODE_2_NO_MOSAIC(COORD) \
COORD \ COORD \
mapData = screenBase[(localX >> 11) + (((localY >> 7) & 0x7F0) << background->size)]; \ mapData = screenBase[(x >> 11) + (((y >> 7) & 0x7F0) << background->size)]; \
pixelData = charBase[(mapData << 6) + ((localY & 0x700) >> 5) + ((localX & 0x700) >> 8)]; pixelData = charBase[(mapData << 6) + ((y & 0x700) >> 5) + ((x & 0x700) >> 8)];
#define MODE_2_MOSAIC(COORD) \ #define MODE_2_MOSAIC(COORD) \
if (!mosaicWait) { \ if (!mosaicWait) { \
@ -56,9 +54,13 @@
#define DRAW_BACKGROUND_MODE_2(BLEND, OBJWIN) \ #define DRAW_BACKGROUND_MODE_2(BLEND, OBJWIN) \
if (background->overflow) { \ if (background->overflow) { \
if (mosaicH > 1) { \ if (mosaicH > 1) { \
localX &= sizeAdjusted - 1; \ int tmpX = x; \
localY &= sizeAdjusted - 1; \ int tmpY = y; \
x = localX & (sizeAdjusted - 1); \
y = localY & (sizeAdjusted - 1); \
MODE_2_NO_MOSAIC(); \ MODE_2_NO_MOSAIC(); \
x = tmpX; \
y = tmpY; \
MODE_2_LOOP(MODE_2_MOSAIC, MODE_2_COORD_OVERFLOW, BLEND, OBJWIN); \ MODE_2_LOOP(MODE_2_MOSAIC, MODE_2_COORD_OVERFLOW, BLEND, OBJWIN); \
} else { \ } else { \
MODE_2_LOOP(MODE_2_NO_MOSAIC, MODE_2_COORD_OVERFLOW, BLEND, OBJWIN); \ MODE_2_LOOP(MODE_2_NO_MOSAIC, MODE_2_COORD_OVERFLOW, BLEND, OBJWIN); \
@ -66,9 +68,13 @@
} else { \ } else { \
if (mosaicH > 1) { \ if (mosaicH > 1) { \
if (!((x | y) & ~(sizeAdjusted - 1))) { \ if (!((x | y) & ~(sizeAdjusted - 1))) { \
localX &= sizeAdjusted - 1; \ int tmpX = x; \
localY &= sizeAdjusted - 1; \ int tmpY = y; \
x = localX & (sizeAdjusted - 1); \
y = localY & (sizeAdjusted - 1); \
MODE_2_NO_MOSAIC(); \ MODE_2_NO_MOSAIC(); \
x = tmpX; \
y = tmpY; \
} \ } \
MODE_2_LOOP(MODE_2_MOSAIC, MODE_2_COORD_NO_OVERFLOW, BLEND, OBJWIN); \ MODE_2_LOOP(MODE_2_MOSAIC, MODE_2_COORD_NO_OVERFLOW, BLEND, OBJWIN); \
} else { \ } else { \