commit 33e798f5e64d758f31edeb75418fd887e44cca48
author shannonwoods@chromium.org <shannonwoods@chromium.org@736b8ea6-26fd-11df-bfd4-992fa37f6226> Thu May 30 00:05:05 2013 +0000
committer shannonwoods@chromium.org <shannonwoods@chromium.org@736b8ea6-26fd-11df-bfd4-992fa37f6226> Thu May 30 00:05:05 2013 +0000
tree 3683fa42db0a45b17acdb70055c8183b6a7aa52b
parent 29233b29003489292f47a03404e0da849b18219d

Add and implement Renderer::getMaxUniformBufferSize(), returning the maximum uniform buffer/block size.

TRAC #22852

Signed-off-by: Geoff Lang
Signed-off-by: Nicolas Capens
Author: Jamie Madill

git-svn-id: https://angleproject.googlecode.com/svn/branches/es3proto@2289 736b8ea6-26fd-11df-bfd4-992fa37f6226

src/libGLESv2/renderer/Renderer.h

diff --git a/src/libGLESv2/renderer/Renderer.h b/src/libGLESv2/renderer/Renderer.h
index 0b2891d..28e7b81 100644
--- a/src/libGLESv2/renderer/Renderer.h
+++ b/src/libGLESv2/renderer/Renderer.h
@@ -166,6 +166,7 @@
     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

diff --git a/src/libGLESv2/renderer/Renderer11.cpp b/src/libGLESv2/renderer/Renderer11.cpp
index 9007890..ab517b6 100644
--- a/src/libGLESv2/renderer/Renderer11.cpp
+++ b/src/libGLESv2/renderer/Renderer11.cpp
@@ -2211,6 +2211,23 @@
     }
 }
 
+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

diff --git a/src/libGLESv2/renderer/Renderer11.h b/src/libGLESv2/renderer/Renderer11.h
index 6725374..7b6ff8e 100644
--- a/src/libGLESv2/renderer/Renderer11.h
+++ b/src/libGLESv2/renderer/Renderer11.h
@@ -111,6 +111,7 @@
     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

diff --git a/src/libGLESv2/renderer/Renderer9.cpp b/src/libGLESv2/renderer/Renderer9.cpp
index cff3aa9..6df49c6 100644
--- a/src/libGLESv2/renderer/Renderer9.cpp
+++ b/src/libGLESv2/renderer/Renderer9.cpp
@@ -2314,6 +2314,11 @@
     return 0;
 }
 
+unsigned int Renderer9::getMaxUniformBufferSize() const
+{
+    return 0;
+}
+
 bool Renderer9::getNonPower2TextureSupport() const
 {
     return mSupportsNonPower2Textures;

src/libGLESv2/renderer/Renderer9.h

diff --git a/src/libGLESv2/renderer/Renderer9.h b/src/libGLESv2/renderer/Renderer9.h
index 0b3e921..b830c15 100644
--- a/src/libGLESv2/renderer/Renderer9.h
+++ b/src/libGLESv2/renderer/Renderer9.h
@@ -126,6 +126,7 @@
     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;