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Add the Phantasy Star Portable 2 depth range hack to Direct3D9 as well.

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It seems to work fine for me..
This commit is contained in:
The Dax 2015-02-23 04:42:04 -05:00
parent c84343e9ae
commit 7104629b24
1 changed files with 32 additions and 0 deletions
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32
GPU/Directx9/ShaderManagerDX9.cpp
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@ -306,6 +306,38 @@ void ShaderManagerDX9::VSUpdateUniforms(int dirtyUniforms) {
flippedMatrix[12] = -flippedMatrix[12];
}
// In Phantasy Star Portable 2, depth range sometimes goes negative and is clamped by glDepthRange to 0,
// causing graphics clipping glitch (issue #1788). This hack modifies the projection matrix to work around it.
if (g_Config.bDepthRangeHack) {
float zScale = getFloat24(gstate.viewportz1) / 65535.0f;
float zOff = getFloat24(gstate.viewportz2) / 65535.0f;
// if far depth range < 0
if (zOff + zScale < 0.0f) {
// if perspective projection
if (flippedMatrix[11] < 0.0f) {
float depthMax = gstate.getDepthRangeMax() / 65535.0f;
float depthMin = gstate.getDepthRangeMin() / 65535.0f;
float a = flippedMatrix[10];
float b = flippedMatrix[14];
float n = b / (a - 1.0f);
float f = b / (a + 1.0f);
f = (n * f) / (n + ((zOff + zScale) * (n - f) / (depthMax - depthMin)));
a = (n + f) / (n - f);
b = (2.0f * n * f) / (n - f);
if (!my_isnan(a) && !my_isnan(b)) {
flippedMatrix[10] = a;
flippedMatrix[14] = b;
}
}
}
}
const bool invertedZ = gstate_c.vpDepth < 0;
ConvertProjMatrixToD3D(flippedMatrix, invertedX, invertedY, invertedZ);