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VideoBackends: Use vertex shader depth range if ztexture is used.

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This commit is contained in:
Jules Blok 2017-02-24 15:16:28 +01:00
parent bde8126913
commit a15555fe03
8 changed files with 69 additions and 60 deletions
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41
Source/Core/VideoCommon/VertexShaderManager.cpp
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@ -391,40 +391,27 @@ void VertexShaderManager::SetConstants()
constants.pixelcentercorrection[2] = 1.0f;
constants.pixelcentercorrection[3] = 0.0f;
if (g_ActiveConfig.backend_info.bSupportsDepthClamp &&
!g_ActiveConfig.backend_info.bSupportsOversizedDepthRanges)
if (g_renderer->UseVertexDepthRange())
{
// Oversized depth ranges are handled in the vertex shader. We need to reverse
// the far value to get a reversed depth range mapping. This is necessary
// because the standard depth range equation pushes all depth values towards
// the back of the depth buffer where conventionally depth buffers have the
// least precision.
// the far value to use the reversed-Z trick.
if (g_ActiveConfig.backend_info.bSupportsReversedDepthRange)
{
if (fabs(xfmem.viewport.zRange) > 16777215.0f || fabs(xfmem.viewport.farZ) > 16777215.0f)
{
// For backends that support reversing the depth range we also support cases
// where the console also uses reversed depth with the same accuracy. We need
// to make sure the depth range is positive here and then reverse the depth in
// the backend viewport.
constants.pixelcentercorrection[2] = fabs(xfmem.viewport.zRange) / 16777215.0f;
if (xfmem.viewport.zRange < 0.0f)
constants.pixelcentercorrection[3] = xfmem.viewport.farZ / 16777215.0f;
else
constants.pixelcentercorrection[3] = 1.0f - xfmem.viewport.farZ / 16777215.0f;
}
// Sometimes the console also tries to use the reversed-Z trick. We can only do
// that with the expected accuracy if the backend can reverse the depth range.
constants.pixelcentercorrection[2] = fabs(xfmem.viewport.zRange) / 16777215.0f;
if (xfmem.viewport.zRange < 0.0f)
constants.pixelcentercorrection[3] = xfmem.viewport.farZ / 16777215.0f;
else
constants.pixelcentercorrection[3] = 1.0f - xfmem.viewport.farZ / 16777215.0f;
}
else
{
if (xfmem.viewport.zRange < 0.0f || xfmem.viewport.zRange > 16777215.0f ||
fabs(xfmem.viewport.farZ) > 16777215.0f)
{
// For backends that don't support reversing the depth range we can still render
// cases where the console uses reversed depth correctly. But we simply can't
// provide the same accuracy as the console.
constants.pixelcentercorrection[2] = xfmem.viewport.zRange / 16777215.0f;
constants.pixelcentercorrection[3] = 1.0f - xfmem.viewport.farZ / 16777215.0f;
}
// For backends that don't support reversing the depth range we can still render
// cases where the console uses the reversed-Z trick. But we simply can't provide
// the expected accuracy, which might result in z-fighting.
constants.pixelcentercorrection[2] = xfmem.viewport.zRange / 16777215.0f;
constants.pixelcentercorrection[3] = 1.0f - xfmem.viewport.farZ / 16777215.0f;
}
}