Implements glGetUniformiv and glGetUniformfv.

TEST=none
BUG=none

Review URL: http://codereview.chromium.org/566019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@37918 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 55 insertions, 0 deletions

diff --git a/gpu/command_buffer/common/gles2_cmd_format.h b/gpu/command_buffer/common/gles2_cmd_format.h
index 7598318..d6d3beb 100644
--- a/gpu/command_buffer/common/gles2_cmd_format.h
+++ b/gpu/command_buffer/common/gles2_cmd_format.h
@@ -40,10 +40,22 @@ struct SizedResult {
   T GetDataAs() {
     return static_cast<T>(static_cast<void*>(&data));
   }
+
+  // Returns the size of the SizedResult for a given size of result.
+  static size_t GetSize(size_t size_of_result) {
+    return size_of_result + sizeof(uint32);  // NOLINT
+  }
+
   uint32 size;  // in bytes.
   int32 data;  // this is just here to get an offset.
 };
 
+COMPILE_ASSERT(sizeof(SizedResult) == 8, SizedResult_size_not_8);
+COMPILE_ASSERT(offsetof(SizedResult, size) == 0,
+               OffsetOf_SizedResult_size_not_0);
+COMPILE_ASSERT(offsetof(SizedResult, data) == 4,
+               OffsetOf_SizedResult_data_not_4);
+
 #include "gpu/command_buffer/common/gles2_cmd_format_autogen.h"
 
 // These are hand written commands.
diff --git a/gpu/command_buffer/common/gles2_cmd_utils.cc b/gpu/command_buffer/common/gles2_cmd_utils.cc
index 8145315..aac4b84 100644
--- a/gpu/command_buffer/common/gles2_cmd_utils.cc
+++ b/gpu/command_buffer/common/gles2_cmd_utils.cc
@@ -343,6 +343,47 @@ uint32 GLES2Util::ComputeImageDataSize(
   return height * row_size;
 }
 
+uint32 GLES2Util::GetGLDataTypeSize(int type) {
+  switch (type) {
+    case GL_FLOAT:
+      return sizeof(GLfloat);              // NOLINT
+    case GL_FLOAT_VEC2:
+      return sizeof(GLfloat) * 2;          // NOLINT
+    case GL_FLOAT_VEC3:
+      return sizeof(GLfloat) * 3;          // NOLINT
+    case GL_FLOAT_VEC4:
+      return sizeof(GLfloat) * 4;          // NOLINT
+    case GL_INT:
+      return sizeof(GLint);                // NOLINT
+    case GL_INT_VEC2:
+      return sizeof(GLint) * 2;            // NOLINT
+    case GL_INT_VEC3:
+      return sizeof(GLint) * 3;            // NOLINT
+    case GL_INT_VEC4:
+      return sizeof(GLint) * 4;            // NOLINT
+    case GL_BOOL:
+      return sizeof(GLint);                // NOLINT
+    case GL_BOOL_VEC2:
+      return sizeof(GLint) * 1;            // NOLINT
+    case GL_BOOL_VEC3:
+      return sizeof(GLint) * 2;            // NOLINT
+    case GL_BOOL_VEC4:
+      return sizeof(GLint) * 3;            // NOLINT
+    case GL_FLOAT_MAT2:
+      return sizeof(GLfloat) * 2 * 2;      // NOLINT
+    case GL_FLOAT_MAT3:
+      return sizeof(GLfloat) * 3 * 3;      // NOLINT
+    case GL_FLOAT_MAT4:
+      return sizeof(GLfloat) * 4 * 4;      // NOLINT
+    case GL_SAMPLER_2D:
+      return sizeof(GLint);                // NOLINT
+    case GL_SAMPLER_CUBE:
+      return sizeof(GLint);                // NOLINT
+    default:
+      return 0;
+  }
+}
+
 }  // namespace gles2
 }  // namespace gpu
 
diff --git a/gpu/command_buffer/common/gles2_cmd_utils.h b/gpu/command_buffer/common/gles2_cmd_utils.h
index 6a14133..1d2139d 100644
--- a/gpu/command_buffer/common/gles2_cmd_utils.h
+++ b/gpu/command_buffer/common/gles2_cmd_utils.h
@@ -30,6 +30,8 @@ class GLES2Util {
   static uint32 ComputeImageDataSize(
     int width, int height, int format, int type, int unpack_alignment);
 
+  static uint32 GetGLDataTypeSize(int type);
+
  private:
   int num_compressed_texture_formats_;
 };