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Exploit cache locality for slightly faster drawing

This commit is contained in:
Jeffrey Pfau 2013-08-03 01:15:08 -07:00
parent 6b86cdf9ef
commit 85e1c2d573
2 changed files with 3 additions and 3 deletions
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4
src/gba/renderers/video-software.c
View File

@ -378,11 +378,10 @@ static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* render
backdrop |= softwareRenderer->variantPalette[0]; backdrop |= softwareRenderer->variantPalette[0];
} }
for (int x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) { for (int x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
row[x] = backdrop; softwareRenderer->row[x] = backdrop;
} }
} }
softwareRenderer->row = row;
memset(softwareRenderer->spriteLayer, 0, sizeof(softwareRenderer->spriteLayer)); memset(softwareRenderer->spriteLayer, 0, sizeof(softwareRenderer->spriteLayer));
softwareRenderer->windows[0].endX = VIDEO_HORIZONTAL_PIXELS; softwareRenderer->windows[0].endX = VIDEO_HORIZONTAL_PIXELS;
@ -400,6 +399,7 @@ static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* render
} }
_drawScanline(softwareRenderer, y); _drawScanline(softwareRenderer, y);
memcpy(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
} }
static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) { static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {

2
src/gba/renderers/video-software.h
View File

@ -86,6 +86,7 @@ struct GBAVideoSoftwareRenderer {
union GBARegisterDISPCNT dispcnt; union GBARegisterDISPCNT dispcnt;
uint32_t row[VIDEO_HORIZONTAL_PIXELS];
uint32_t spriteLayer[VIDEO_HORIZONTAL_PIXELS]; uint32_t spriteLayer[VIDEO_HORIZONTAL_PIXELS];
// BLDCNT // BLDCNT
@ -118,7 +119,6 @@ struct GBAVideoSoftwareRenderer {
struct GBAVideoSoftwareBackground bg[4]; struct GBAVideoSoftwareBackground bg[4];
uint32_t* row;
int start; int start;
int end; int end;