Merge pull request #10754 from tellowkrinkle/Metal

VideoBackends: Add Metal backend

1 files changed, 21 insertions, 0 deletions

diff --git a/Source/Core/VideoCommon/FramebufferShaderGen.cpp b/Source/Core/VideoCommon/FramebufferShaderGen.cpp
index 345578d071..49684bb518 100644
--- a/Source/Core/VideoCommon/FramebufferShaderGen.cpp
+++ b/Source/Core/VideoCommon/FramebufferShaderGen.cpp
@@ -34,6 +34,7 @@ void EmitSamplerDeclarations(ShaderCode& code, u32 start = 0, u32 end = 1,
   switch (GetAPIType())
   {
   case APIType::D3D:
+  case APIType::Metal:
   case APIType::OpenGL:
   case APIType::Vulkan:
   {
@@ -55,6 +56,7 @@ void EmitSampleTexture(ShaderCode& code, u32 n, std::string_view coords)
   switch (GetAPIType())
   {
   case APIType::D3D:
+  case APIType::Metal:
   case APIType::OpenGL:
   case APIType::Vulkan:
     code.Write("texture(samp{}, {})", n, coords);
@@ -72,6 +74,7 @@ void EmitTextureLoad(ShaderCode& code, u32 n, std::string_view coords)
   switch (GetAPIType())
   {
   case APIType::D3D:
+  case APIType::Metal:
   case APIType::OpenGL:
   case APIType::Vulkan:
     code.Write("texelFetch(samp{}, ({}).xyz, ({}).w)", n, coords, coords);
@@ -89,6 +92,7 @@ void EmitVertexMainDeclaration(ShaderCode& code, u32 num_tex_inputs, u32 num_col
   switch (GetAPIType())
   {
   case APIType::D3D:
+  case APIType::Metal:
   case APIType::OpenGL:
   case APIType::Vulkan:
   {
@@ -138,6 +142,7 @@ void EmitPixelMainDeclaration(ShaderCode& code, u32 num_tex_inputs, u32 num_colo
   switch (GetAPIType())
   {
   case APIType::D3D:
+  case APIType::Metal:
   case APIType::OpenGL:
   case APIType::Vulkan:
   {
@@ -333,6 +338,22 @@ std::string GenerateColorPixelShader()
   return code.GetBuffer();
 }
 
+std::string GenerateResolveColorPixelShader(u32 samples)
+{
+  ShaderCode code;
+  EmitSamplerDeclarations(code, 0, 1, true);
+  EmitPixelMainDeclaration(code, 1, 0);
+  code.Write("{{\n"
+             "  int layer = int(v_tex0.z);\n"
+             "  int3 coords = int3(int2(gl_FragCoord.xy), layer);\n"
+             "  ocol0 = float4(0.0f);\n");
+  code.Write("  for (int i = 0; i < {}; i++)\n", samples);
+  code.Write("    ocol0 += texelFetch(samp0, coords, i);\n");
+  code.Write("  ocol0 /= {}.0f;\n", samples);
+  code.Write("}}\n");
+  return code.GetBuffer();
+}
+
 std::string GenerateResolveDepthPixelShader(u32 samples)
 {
   ShaderCode code;