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Merge pull request #11402 from FernandoS27/depth-bias-control

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Vulkan: Implement Depth Bias Control
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liamwhite 2023-09-28 09:35:37 -04:00 • committed by GitHub
commit 7bae22a3ca
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7 changed files with 69 additions and 3 deletions
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28
src/video_core/renderer_vulkan/vk_rasterizer.cpp
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@ -1014,15 +1014,37 @@ void RasterizerVulkan::UpdateDepthBias(Tegra::Engines::Maxwell3D::Regs& regs) {
regs.zeta.format == Tegra::DepthFormat::X8Z24_UNORM ||
regs.zeta.format == Tegra::DepthFormat::S8Z24_UNORM ||
regs.zeta.format == Tegra::DepthFormat::V8Z24_UNORM;
if (is_d24 && !device.SupportsD24DepthBuffer()) {
bool force_unorm = ([&] {
if (!is_d24 || device.SupportsD24DepthBuffer()) {
return false;
}
if (device.IsExtDepthBiasControlSupported()) {
return true;
}
if (!Settings::values.renderer_amdvlk_depth_bias_workaround) {
return false;
}
// the base formulas can be obtained from here:
// https://docs.microsoft.com/en-us/windows/win32/direct3d11/d3d10-graphics-programming-guide-output-merger-stage-depth-bias
const double rescale_factor =
static_cast<double>(1ULL << (32 - 24)) / (static_cast<double>(0x1.ep+127));
units = static_cast<float>(static_cast<double>(units) * rescale_factor);
}
return false;
})();
scheduler.Record([constant = units, clamp = regs.depth_bias_clamp,
factor = regs.slope_scale_depth_bias](vk::CommandBuffer cmdbuf) {
factor = regs.slope_scale_depth_bias, force_unorm,
precise = device.HasExactDepthBiasControl()](vk::CommandBuffer cmdbuf) {
if (force_unorm) {
VkDepthBiasRepresentationInfoEXT info{
.sType = VK_STRUCTURE_TYPE_DEPTH_BIAS_REPRESENTATION_INFO_EXT,
.pNext = nullptr,
.depthBiasRepresentation =
VK_DEPTH_BIAS_REPRESENTATION_LEAST_REPRESENTABLE_VALUE_FORCE_UNORM_EXT,
.depthBiasExact = precise ? VK_TRUE : VK_FALSE,
};
cmdbuf.SetDepthBias(constant, clamp, factor, &info);
return;
}
cmdbuf.SetDepthBias(constant, clamp, factor);
});
}