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OGL: Fall back to the old dual-source blending behaviour.

This commit is contained in:
Jules Blok 2016-10-29 17:24:10 +02:00
parent 41563c55cd
commit ce9f717045
2 changed files with 15 additions and 14 deletions
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7
Source/Core/VideoBackends/OGL/Render.cpp
View File

@ -445,8 +445,7 @@ Renderer::Renderer()
g_Config.backend_info.bSupportsDualSourceBlend =
(GLExtensions::Supports("GL_ARB_blend_func_extended") ||
GLExtensions::Supports("GL_EXT_blend_func_extended")) &&
!DriverDetails::HasBug(DriverDetails::BUG_BROKEN_DUAL_SOURCE_BLENDING);
GLExtensions::Supports("GL_EXT_blend_func_extended"));
g_Config.backend_info.bSupportsPrimitiveRestart =
!DriverDetails::HasBug(DriverDetails::BUG_PRIMITIVERESTART) &&
((GLExtensions::Version() >= 310) || GLExtensions::Supports("GL_NV_primitive_restart"));
@ -1244,6 +1243,10 @@ void Renderer::SetBlendMode(bool forceUpdate)
bool useDstAlpha = bpmem.dstalpha.enable && bpmem.blendmode.alphaupdate && target_has_alpha;
bool useDualSource = g_ActiveConfig.backend_info.bSupportsDualSourceBlend;
// Only use dual-source blending when required on drivers that don't support it very well.
if (DriverDetails::HasBug(DriverDetails::BUG_BROKEN_DUAL_SOURCE_BLENDING) && !useDstAlpha)
useDualSource = false;
const GLenum glSrcFactors[8] = {
GL_ZERO,
GL_ONE,

10
Source/Core/VideoCommon/PixelShaderGen.cpp
View File

@ -507,7 +507,9 @@ ShaderCode GeneratePixelShaderCode(APIType ApiType, const pixel_shader_uid_data*
if (ApiType == APIType::OpenGL || ApiType == APIType::Vulkan)
{
if (g_ActiveConfig.backend_info.bSupportsDualSourceBlend)
if (g_ActiveConfig.backend_info.bSupportsDualSourceBlend &&
(!DriverDetails::HasBug(DriverDetails::BUG_BROKEN_DUAL_SOURCE_BLENDING) ||
uid_data->dstAlphaMode == DSTALPHA_DUAL_SOURCE_BLEND))
{
if (DriverDetails::HasBug(DriverDetails::BUG_BROKEN_FRAGMENT_SHADER_INDEX_DECORATION))
{
@ -523,6 +525,7 @@ ShaderCode GeneratePixelShaderCode(APIType ApiType, const pixel_shader_uid_data*
else
{
out.Write("FRAGMENT_OUTPUT_LOCATION(0) out vec4 ocol0;\n");
out.Write("vec4 ocol1;\n"); // Consume the output we don't use
}
if (uid_data->per_pixel_depth)
@ -1207,7 +1210,6 @@ static void WriteAlphaTest(ShaderCode& out, const pixel_shader_uid_data* uid_dat
out.Write(")) {\n");
out.Write("\t\tocol0 = float4(0.0, 0.0, 0.0, 0.0);\n");
if (g_ActiveConfig.backend_info.bSupportsDualSourceBlend)
out.Write("\t\tocol1 = float4(0.0, 0.0, 0.0, 0.0);\n");
if (per_pixel_depth)
{
@ -1304,7 +1306,6 @@ static void WriteColor(ShaderCode& out, const pixel_shader_uid_data* uid_data)
if (uid_data->dstAlphaMode == DSTALPHA_NONE)
{
out.Write("\tocol0.a = float(prev.a >> 2) / 63.0;\n");
if (g_ActiveConfig.backend_info.bSupportsDualSourceBlend)
out.Write("\tocol1.a = float(prev.a) / 255.0;\n");
}
else
@ -1313,12 +1314,9 @@ static void WriteColor(ShaderCode& out, const pixel_shader_uid_data* uid_data)
out.Write("\tocol0.a = float(" I_ALPHA ".a >> 2) / 63.0;\n");
// Use dual-source color blending to perform dst alpha in a single pass
if (g_ActiveConfig.backend_info.bSupportsDualSourceBlend)
{
if (uid_data->dstAlphaMode == DSTALPHA_DUAL_SOURCE_BLEND)
out.Write("\tocol1.a = float(prev.a) / 255.0;\n");
else
out.Write("\tocol1.a = float(" I_ALPHA ".a) / 255.0;\n");
}
}
}