Add and implement Renderer::getMaxUniformBufferSize(), returning the maximum…

src/libGLESv2/renderer/Renderer.h

@@ -166,6 +166,7 @@ class Renderer
     virtual unsigned int getMaxVertexShaderUniformBuffers() const = 0;
     virtual unsigned int getMaxFragmentShaderUniformBuffers() const = 0;
     virtual unsigned int getMaxTransformFeedbackBuffers() const = 0;
+    virtual unsigned int getMaxUniformBufferSize() const = 0;
     virtual bool getNonPower2TextureSupport() const = 0;
     virtual bool getDepthTextureSupport() const = 0;
     virtual bool getOcclusionQuerySupport() const = 0;

src/libGLESv2/renderer/Renderer11.cpp

@@ -2211,6 +2211,23 @@ unsigned int Renderer11::getMaxTransformFeedbackBuffers() const
     }
 }
 
+unsigned int Renderer11::getMaxUniformBufferSize() const
+{
+    // Each component is a 4-element vector of 4-byte units (floats)
+    const unsigned int bytesPerComponent = 4 * sizeof(float);
+
+    switch (mFeatureLevel)
+    {
+      case D3D_FEATURE_LEVEL_11_0:
+        return D3D11_REQ_CONSTANT_BUFFER_ELEMENT_COUNT * bytesPerComponent;
+      case D3D_FEATURE_LEVEL_10_1:
+      case D3D_FEATURE_LEVEL_10_0:
+        return D3D10_REQ_CONSTANT_BUFFER_ELEMENT_COUNT * bytesPerComponent;
+      default: UNREACHABLE();
+        return 0;
+    }
+}
+
 bool Renderer11::getNonPower2TextureSupport() const
 {
     switch (mFeatureLevel)

src/libGLESv2/renderer/Renderer11.h

@@ -111,6 +111,7 @@ class Renderer11 : public Renderer
     virtual unsigned int getMaxVertexShaderUniformBuffers() const;
     virtual unsigned int getMaxFragmentShaderUniformBuffers() const;
     virtual unsigned int getMaxTransformFeedbackBuffers() const;
+    virtual unsigned int getMaxUniformBufferSize() const;
     virtual bool getNonPower2TextureSupport() const;
     virtual bool getDepthTextureSupport() const;
     virtual bool getOcclusionQuerySupport() const;

src/libGLESv2/renderer/Renderer9.cpp

@@ -2314,6 +2314,11 @@ unsigned int Renderer9::getMaxTransformFeedbackBuffers() const
     return 0;
 }
 
+unsigned int Renderer9::getMaxUniformBufferSize() const
+{
+    return 0;
+}
+
 bool Renderer9::getNonPower2TextureSupport() const
 {
     return mSupportsNonPower2Textures;

src/libGLESv2/renderer/Renderer9.h

@@ -126,6 +126,7 @@ class Renderer9 : public Renderer
     virtual unsigned int getMaxVertexShaderUniformBuffers() const;
     virtual unsigned int getMaxFragmentShaderUniformBuffers() const;
     virtual unsigned int getMaxTransformFeedbackBuffers() const;
+    virtual unsigned int getMaxUniformBufferSize() const;
     virtual bool getNonPower2TextureSupport() const;
     virtual bool getDepthTextureSupport() const;
     virtual bool getOcclusionQuerySupport() const;