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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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27
Source/Core/VideoCommon/RenderBase.cpp
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@ -940,3 +940,30 @@ void Renderer::DumpFrameToImage(const FrameDumpConfig& config)
TextureToPng(config.data, config.stride, filename, config.width, config.height, false);
m_frame_dump_image_counter++;
}
bool Renderer::UseVertexDepthRange() const
{
// We can't compute the depth range in the vertex shader if we don't support depth clamp.
if (!g_ActiveConfig.backend_info.bSupportsDepthClamp)
return false;
if (g_ActiveConfig.backend_info.bSupportsOversizedDepthRanges)
{
// We support oversized depth ranges, but we need a full depth range if a ztexture is used.
return bpmem.ztex2.type != ZTEXTURE_DISABLE;
}
else
{
// We need a full depth range if a ztexture is used.
if (bpmem.ztex2.type != ZTEXTURE_DISABLE)
return true;
// If an inverted depth range is unsupported, we also need to check if the range is inverted.
if (!g_ActiveConfig.backend_info.bSupportsReversedDepthRange && xfmem.viewport.zRange < 0.0f)
return true;
// If an oversized depth range or a ztexture is used, we need to calculate the depth range
// in the vertex shader.
return fabs(xfmem.viewport.zRange) > 16777215.0f || fabs(xfmem.viewport.farZ) > 16777215.0f;
}
}