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DriverDetails: Add broken discard with early-Z bug on Apple Silicon GPUs

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This commit is contained in:
OatmealDome
2021-12-25 00:27:43 -05:00
parent e7f5e5172c
commit 259a5fc7c0
6 changed files with 70 additions and 16 deletions
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31
Source/Core/VideoCommon/PixelShaderGen.cpp
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@ -321,7 +321,9 @@ PixelShaderUid GetPixelShaderUid()
BlendingState state = {};
state.Generate(bpmem);
if (state.usedualsrc && state.dstalpha && g_ActiveConfig.backend_info.bSupportsFramebufferFetch &&
if (((state.usedualsrc && state.dstalpha) ||
DriverDetails::HasBug(DriverDetails::BUG_BROKEN_DISCARD_WITH_EARLY_Z)) &&
g_ActiveConfig.backend_info.bSupportsFramebufferFetch &&
!g_ActiveConfig.backend_info.bSupportsDualSourceBlend)
{
uid_data->blend_enable = state.blendenable;
@ -944,10 +946,15 @@ ShaderCode GeneratePixelShaderCode(APIType api_type, const ShaderHostConfig& hos
(!DriverDetails::HasBug(DriverDetails::BUG_BROKEN_DUAL_SOURCE_BLENDING) ||
uid_data->useDstAlpha);
const bool use_shader_blend =
!use_dual_source && uid_data->useDstAlpha && host_config.backend_shader_framebuffer_fetch;
!use_dual_source &&
(uid_data->useDstAlpha ||
DriverDetails::HasBug(DriverDetails::BUG_BROKEN_DISCARD_WITH_EARLY_Z)) &&
host_config.backend_shader_framebuffer_fetch;
const bool use_shader_logic_op = !host_config.backend_logic_op && uid_data->logic_op_enable &&
host_config.backend_shader_framebuffer_fetch;
const bool use_framebuffer_fetch = use_shader_blend || use_shader_logic_op;
const bool use_framebuffer_fetch =
use_shader_blend || use_shader_logic_op ||
DriverDetails::HasBug(DriverDetails::BUG_BROKEN_DISCARD_WITH_EARLY_Z);
if (api_type == APIType::OpenGL || api_type == APIType::Vulkan)
{
@ -1869,9 +1876,23 @@ static void WriteAlphaTest(ShaderCode& out, const pixel_shader_uid_data* uid_dat
// ZCOMPLOC HACK:
if (!uid_data->alpha_test_use_zcomploc_hack)
{
out.Write("\t\tdiscard;\n");
if (api_type == APIType::D3D)
#ifdef __APPLE__
if (uid_data->forced_early_z &&
DriverDetails::HasBug(DriverDetails::BUG_BROKEN_DISCARD_WITH_EARLY_Z))
{
// Instead of using discard, fetch the framebuffer's color value and use it as the output
// for this fragment.
out.Write("\t\t{} = float4(initial_ocol0.xyz, 1.0);\n",
use_dual_source ? "real_ocol0" : "ocol0");
out.Write("\t\treturn;\n");
}
else
#endif
{
out.Write("\t\tdiscard;\n");
if (api_type == APIType::D3D)
out.Write("\t\treturn;\n");
}
}
out.Write("\t}}\n");