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GB Video: Optimize sprite rendering

This commit is contained in:
Jeffrey Pfau 2016-02-17 19:35:36 -08:00
parent d8dc368f36
commit 395f710805
1 changed files with 85 additions and 9 deletions
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94
src/gb/renderers/software.c
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@ -299,22 +299,98 @@ static void GBVideoSoftwareRendererDrawObj(struct GBVideoSoftwareRenderer* rende
p = (GBObjAttributesGetPalette(obj->attr) + 8) * 4;
}
int bottomX;
int x;
for (x = startX; x < endX; ++x) {
if (GBObjAttributesIsXFlip(obj->attr)) {
bottomX = (x - obj->x) & 7;
} else {
bottomX = 7 - ((x - obj->x) & 7);
int x = startX;
if ((x - obj->x) & 7) {
for (; x < endX; ++x) {
if (GBObjAttributesIsXFlip(obj->attr)) {
bottomX = (x - obj->x) & 7;
} else {
bottomX = 7 - ((x - obj->x) & 7);
}
int objTile = obj->tile + tileOffset;
uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
tileDataUpper >>= bottomX;
tileDataLower >>= bottomX;
color_t current = renderer->row[x];
if (((tileDataUpper | tileDataLower) & 1) && !(current & mask)) {
renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
}
}
} else if (GBObjAttributesIsXFlip(obj->attr)) {
int objTile = obj->tile + tileOffset;
uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
tileDataUpper >>= bottomX;
tileDataLower >>= bottomX;
color_t current = renderer->row[x];
color_t current;
current = renderer->row[x];
if (((tileDataUpper | tileDataLower) & 1) && !(current & mask)) {
renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
}
current = renderer->row[x + 1];
if (((tileDataUpper | tileDataLower) & 2) && !(current & mask)) {
renderer->row[x + 1] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
}
current = renderer->row[x + 2];
if (((tileDataUpper | tileDataLower) & 4) && !(current & mask)) {
renderer->row[x + 2] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
}
current = renderer->row[x + 3];
if (((tileDataUpper | tileDataLower) & 8) && !(current & mask)) {
renderer->row[x + 3] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
}
current = renderer->row[x + 4];
if (((tileDataUpper | tileDataLower) & 16) && !(current & mask)) {
renderer->row[x + 4] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
}
current = renderer->row[x + 5];
if (((tileDataUpper | tileDataLower) & 32) && !(current & mask)) {
renderer->row[x + 5] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
}
current = renderer->row[x + 6];
if (((tileDataUpper | tileDataLower) & 64) && !(current & mask)) {
renderer->row[x + 6] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
}
current = renderer->row[x + 7];
if (((tileDataUpper | tileDataLower) & 128) && !(current & mask)) {
renderer->row[x + 7] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
}
} else {
int objTile = obj->tile + tileOffset;
uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
color_t current;
current = renderer->row[x + 7];
if (((tileDataUpper | tileDataLower) & 1) && !(current & mask)) {
renderer->row[x + 7] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
}
current = renderer->row[x + 6];
if (((tileDataUpper | tileDataLower) & 2) && !(current & mask)) {
renderer->row[x + 6] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
}
current = renderer->row[x + 5];
if (((tileDataUpper | tileDataLower) & 4) && !(current & mask)) {
renderer->row[x + 5] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
}
current = renderer->row[x + 4];
if (((tileDataUpper | tileDataLower) & 8) && !(current & mask)) {
renderer->row[x + 4] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
}
current = renderer->row[x + 3];
if (((tileDataUpper | tileDataLower) & 16) && !(current & mask)) {
renderer->row[x + 3] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
}
current = renderer->row[x + 2];
if (((tileDataUpper | tileDataLower) & 32) && !(current & mask)) {
renderer->row[x + 2] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
}
current = renderer->row[x + 1];
if (((tileDataUpper | tileDataLower) & 64) && !(current & mask)) {
renderer->row[x + 1] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
}
current = renderer->row[x];
if (((tileDataUpper | tileDataLower) & 128) && !(current & mask)) {
renderer->row[x] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
}
}
}