From 2bc3be07119003297745402ae8e4efad20d27d05 Mon Sep 17 00:00:00 2001
From: rogerman <rogerman@users.noreply.github.com>
Date: Sun, 22 Oct 2017 22:08:41 -0700
Subject: [PATCH] Cocoa Port: Bottom-tier GPUs running an OpenGL display
 presenter now use faster (but less accurate) shaders for Bicubic B-Spline and
 Bicubic Michell-Netravali.

---
 .../src/frontend/cocoa/OGLDisplayOutput.cpp   | 44 +++++++++++++++++--
 1 file changed, 40 insertions(+), 4 deletions(-)

diff --git a/desmume/src/frontend/cocoa/OGLDisplayOutput.cpp b/desmume/src/frontend/cocoa/OGLDisplayOutput.cpp
index 558ba9d72..5ab80f6ea 100644
--- a/desmume/src/frontend/cocoa/OGLDisplayOutput.cpp
+++ b/desmume/src/frontend/cocoa/OGLDisplayOutput.cpp
@@ -5708,12 +5708,30 @@ void OGLImage::SetOutputFilterOGL(const int filterID)
 				break;
 				
 			case OutputFilterTypeID_BicubicBSpline:
-				this->_finalOutputProgram->SetVertexAndFragmentShaderOGL(BicubicSample4x4Output_VertShader_110, FilterBicubicBSplineFragShader_110, false, _useShader150);
+			{
+				if (this->_shaderSupport == ShaderSupport_BottomTier)
+				{
+					this->_finalOutputProgram->SetVertexAndFragmentShaderOGL(Sample1x1OutputVertShader_100, FilterBicubicBSplineFastFragShader_110, false, _useShader150);
+				}
+				else
+				{
+					this->_finalOutputProgram->SetVertexAndFragmentShaderOGL(BicubicSample4x4Output_VertShader_110, FilterBicubicBSplineFragShader_110, false, _useShader150);
+				}
 				break;
+			}
 				
 			case OutputFilterTypeID_BicubicMitchell:
-				this->_finalOutputProgram->SetVertexAndFragmentShaderOGL(BicubicSample4x4Output_VertShader_110, FilterBicubicMitchellNetravaliFragShader_110, false, _useShader150);
+			{
+				if (this->_shaderSupport == ShaderSupport_BottomTier)
+				{
+					this->_finalOutputProgram->SetVertexAndFragmentShaderOGL(Sample1x1OutputVertShader_100, FilterBicubicMitchellNetravaliFastFragShader_110, false, _useShader150);
+				}
+				else
+				{
+					this->_finalOutputProgram->SetVertexAndFragmentShaderOGL(BicubicSample4x4Output_VertShader_110, FilterBicubicMitchellNetravaliFragShader_110, false, _useShader150);
+				}
 				break;
+			}
 				
 			case OutputFilterTypeID_Lanczos2:
 				this->_finalOutputProgram->SetVertexAndFragmentShaderOGL(BicubicSample4x4Output_VertShader_110, FilterLanczos2FragShader_110, false, _useShader150);
@@ -6719,12 +6737,30 @@ OutputFilterTypeID OGLDisplayLayer::SetOutputFilterOGL(const OutputFilterTypeID
 				break;
 				
 			case OutputFilterTypeID_BicubicBSpline:
-				this->_finalOutputProgram->SetVertexAndFragmentShaderOGL(BicubicSample4x4Output_VertShader_110, FilterBicubicBSplineFragShader_110, false, useShader150);
+			{
+				if (shaderSupport == ShaderSupport_BottomTier)
+				{
+					this->_finalOutputProgram->SetVertexAndFragmentShaderOGL(Sample1x1OutputVertShader_100, FilterBicubicBSplineFastFragShader_110, false, useShader150);
+				}
+				else
+				{
+					this->_finalOutputProgram->SetVertexAndFragmentShaderOGL(BicubicSample4x4Output_VertShader_110, FilterBicubicBSplineFragShader_110, false, useShader150);
+				}
 				break;
+			}
 				
 			case OutputFilterTypeID_BicubicMitchell:
-				this->_finalOutputProgram->SetVertexAndFragmentShaderOGL(BicubicSample4x4Output_VertShader_110, FilterBicubicMitchellNetravaliFragShader_110, false, useShader150);
+			{
+				if (shaderSupport == ShaderSupport_BottomTier)
+				{
+					this->_finalOutputProgram->SetVertexAndFragmentShaderOGL(Sample1x1OutputVertShader_100, FilterBicubicMitchellNetravaliFastFragShader_110, false, useShader150);
+				}
+				else
+				{
+					this->_finalOutputProgram->SetVertexAndFragmentShaderOGL(BicubicSample4x4Output_VertShader_110, FilterBicubicMitchellNetravaliFragShader_110, false, useShader150);
+				}
 				break;
+			}
 				
 			case OutputFilterTypeID_Lanczos2:
 				this->_finalOutputProgram->SetVertexAndFragmentShaderOGL(BicubicSample4x4Output_VertShader_110, FilterLanczos2FragShader_110, false, useShader150);