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d3d: Support the Breath of Fire 3 hack.

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Since framebuffers are not always flipped.
This commit is contained in:
Unknown W. Brackets 2014-09-14 00:49:40 -07:00
parent d48fb04a18
commit 692cc8dbf1
1 changed files with 18 additions and 6 deletions
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24
GPU/Common/SoftwareTransformCommon.cpp
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@ -395,13 +395,21 @@ void SoftwareTransform(
return;
}
if (gstate_c.flipTexture && maxIndex >= 2) {
// This means we're using a framebuffer (and one that isn't big enough.)
if (gstate_c.curTextureHeight < (u32)gstate.getTextureHeight(0) && maxIndex >= 2) {
// Even if not rectangles, this will detect if either of the first two are outside the framebuffer.
// HACK: Adding one pixel margin to this detection fixes issues in Assassin's Creed : Bloodlines,
// while still keeping BOF working (see below).
const float invTexH = 1.0f / gstate_c.curTextureHeight; // size of one texel.
const bool tlOutside = transformed[0].v < -invTexH && transformed[0].v > 1.0f - heightFactor;
const bool brOutside = transformed[1].v < -invTexH && transformed[1].v > 1.0f - heightFactor;
bool tlOutside;
bool brOutside;
if (gstate_c.flipTexture) {
tlOutside = transformed[0].v < -invTexH && transformed[0].v > 1.0f - heightFactor;
brOutside = transformed[1].v < -invTexH && transformed[1].v > 1.0f - heightFactor;
} else {
tlOutside = transformed[0].v > invTexH && transformed[0].v > heightFactor - 1.0f;
brOutside = transformed[1].v > invTexH && transformed[1].v > heightFactor - 1.0f;
}
if (tlOutside || brOutside) {
// Okay, so we're texturing from outside the framebuffer, but inside the texture height.
// Breath of Fire 3 does this to access a render surface at an offset.
@ -420,9 +428,13 @@ void SoftwareTransform(
for (int index = 0; index < maxIndex; ++index) {
transformed[index].u *= widthFactor / oldWidthFactor;
// Inverse it back to scale to the new FBO, and add 1.0f to account for old FBO.
transformed[index].v = (1.0f - transformed[index].v) / oldHeightFactor;
transformed[index].v -= yDiff;
transformed[index].v = 1.0f - (transformed[index].v * heightFactor);
if (gstate_c.flipTexture) {
transformed[index].v = (1.0f - transformed[index].v) / oldHeightFactor;
transformed[index].v -= yDiff;
transformed[index].v = 1.0f - (transformed[index].v * heightFactor);
} else {
transformed[index].v = (transformed[index].v / oldHeightFactor - yDiff) * heightFactor;
}
}
}
}