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GBA Video: Fix some small cases in sprite optimization

This commit is contained in:
Jeffrey Pfau 2016-08-16 22:40:03 -07:00
parent c6dd9b6e64
commit 400ac04d42
1 changed files with 32 additions and 28 deletions
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60
src/gba/renderers/software-obj.c
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@ -208,35 +208,39 @@ int GBAVideoSoftwareRendererPreprocessSprite(struct GBAVideoSoftwareRenderer* re
}
// Clip off early pixels
if ((xAccum >> 8) < -(width >> 1)) {
int32_t diffX = -(width << 7) - xAccum;
int32_t x = mat.a ? diffX / mat.a : 0;
xAccum += mat.a * x;
yAccum += mat.c * x;
outX += x;
inX += x;
} else if ((xAccum >> 8) >= (width >> 1)) {
int32_t diffX = (width << 7) - xAccum;
int32_t x = mat.a ? diffX / mat.a : 0;
xAccum += mat.a * x;
yAccum += mat.c * x;
outX += x;
inX += x;
if (mat.a) {
if ((xAccum >> 8) < -(width >> 1)) {
int32_t diffX = -(width << 7) - xAccum - 1;
int32_t x = mat.a ? diffX / mat.a : 0;
xAccum += mat.a * x;
yAccum += mat.c * x;
outX += x;
inX += x;
} else if ((xAccum >> 8) >= (width >> 1)) {
int32_t diffX = (width << 7) - xAccum;
int32_t x = mat.a ? diffX / mat.a : 0;
xAccum += mat.a * x;
yAccum += mat.c * x;
outX += x;
inX += x;
}
}
if ((yAccum >> 8) < -(height >> 1)) {
int32_t diffY = -(height << 7) - yAccum;
int32_t y = mat.c ? diffY / mat.c : 0;
xAccum += mat.a * y;
yAccum += mat.c * y;
outX += y;
inX += y;
} else if ((yAccum >> 8) >= (height >> 1)) {
int32_t diffY = (height << 7) - yAccum;
int32_t y = mat.c ? diffY / mat.c : 0;
xAccum += mat.a * y;
yAccum += mat.c * y;
outX += y;
inX += y;
if (mat.c) {
if ((yAccum >> 8) < -(height >> 1)) {
int32_t diffY = -(height << 7) - yAccum - 1;
int32_t y = mat.c ? diffY / mat.c : 0;
xAccum += mat.a * y;
yAccum += mat.c * y;
outX += y;
inX += y;
} else if ((yAccum >> 8) >= (height >> 1)) {
int32_t diffY = (height << 7) - yAccum;
int32_t y = mat.c ? diffY / mat.c : 0;
xAccum += mat.a * y;
yAccum += mat.c * y;
outX += y;
inX += y;
}
}
if (!GBAObjAttributesAIs256Color(sprite->a)) {