bool FShaderResource::ArePlatformsCompatible(EShaderPlatform CurrentPlatform, EShaderPlatform TargetPlatform)
{
bool bFeatureLevelCompatible = CurrentPlatform == TargetPlatform;
if (!bFeatureLevelCompatible && IsPCPlatform(CurrentPlatform) && IsPCPlatform(TargetPlatform) )
{
if (CurrentPlatform == SP_OPENGL_SM4_MAC || TargetPlatform == SP_OPENGL_SM4_MAC)
{
// prevent SP_OPENGL_SM4 == SP_OPENGL_SM4_MAC, allow SP_OPENGL_SM4_MAC == SP_OPENGL_SM4_MAC,
// allow lesser feature levels on SP_OPENGL_SM4_MAC device.
// do not allow MAC targets to work on non MAC devices.
bFeatureLevelCompatible = CurrentPlatform == SP_OPENGL_SM4_MAC &&
GetMaxSupportedFeatureLevel(CurrentPlatform) >= GetMaxSupportedFeatureLevel(TargetPlatform);
}
else
{
bFeatureLevelCompatible = GetMaxSupportedFeatureLevel(CurrentPlatform) >= GetMaxSupportedFeatureLevel(TargetPlatform);
}
bool bIsTargetD3D = TargetPlatform == SP_PCD3D_SM5 ||
TargetPlatform == SP_PCD3D_SM4 ||
TargetPlatform == SP_PCD3D_ES3_1 ||
TargetPlatform == SP_PCD3D_ES2;
bool bIsCurrentPlatformD3D = CurrentPlatform == SP_PCD3D_SM5 ||
CurrentPlatform == SP_PCD3D_SM4 ||
TargetPlatform == SP_PCD3D_ES3_1 ||
CurrentPlatform == SP_PCD3D_ES2;
bFeatureLevelCompatible = bFeatureLevelCompatible && (bIsCurrentPlatformD3D == bIsTargetD3D);
}
return bFeatureLevelCompatible;
}
void TGPUSkinVertexFactory<bExtraBoneInfluencesT>::ModifyCompilationEnvironment(EShaderPlatform Platform, const FMaterial* Material, FShaderCompilerEnvironment& OutEnvironment )
{
FVertexFactory::ModifyCompilationEnvironment(Platform, Material, OutEnvironment);
const int32 MaxGPUSkinBones = GetFeatureLevelMaxNumberOfBones(GetMaxSupportedFeatureLevel(Platform));
OutEnvironment.SetDefine(TEXT("MAX_SHADER_BONES"), MaxGPUSkinBones);
const uint32 UseExtraBoneInfluences = bExtraBoneInfluencesT;
OutEnvironment.SetDefine(TEXT("GPUSKIN_USE_EXTRA_INFLUENCES"), UseExtraBoneInfluences);
}
bool TGPUSkinVertexFactory<bExtraBoneInfluencesT>::ShouldCache(EShaderPlatform Platform, const class FMaterial* Material, const FShaderType* ShaderType)
{
// Skip trying to use extra bone influences on < SM4
if (bExtraBoneInfluencesT && GetMaxSupportedFeatureLevel(Platform) < ERHIFeatureLevel::ES3_1)
{
return false;
}
return (Material->IsUsedWithSkeletalMesh() || Material->IsSpecialEngineMaterial());
}
bool TGPUSkinAPEXClothVertexFactory<bExtraBoneInfluencesT>::ShouldCache(EShaderPlatform Platform, const class FMaterial* Material, const class FShaderType* ShaderType)
{
return GetMaxSupportedFeatureLevel(Platform) >= ERHIFeatureLevel::SM4
&& (Material->IsUsedWithAPEXCloth() || Material->IsSpecialEngineMaterial())
&& Super::ShouldCache(Platform, Material, ShaderType);
}