Add initial support for NV_path_rendering extension to gpu command buffer

gpu/command_buffer/service/gles2_cmd_decoder.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <stdio.h>
 
 #include <algorithm>
 #include <list>
@@ skipping 969 matching lines @@
   void DoReleaseTexImage2DCHROMIUM(
       GLenum target,
       GLint image_id);
 
   void DoTraceEndCHROMIUM(void);
 
   void DoDrawBuffersEXT(GLsizei count, const GLenum* bufs);
 
   void DoLoseContextCHROMIUM(GLenum current, GLenum other);
 
+  void DoMatrixLoadfCHROMIUM(GLenum matrix_mode, const GLfloat* matrix);
+  void DoMatrixLoadIdentityCHROMIUM(GLenum matrix_mode);
+
   // Creates a Program for the given program.
   Program* CreateProgram(
       GLuint client_id, GLuint service_id) {
     return program_manager()->CreateProgram(client_id, service_id);
   }
 
   // Gets the program info for the given program. Returns NULL if none exists.
   Program* GetProgram(GLuint client_id) {
     return program_manager()->GetProgram(client_id);
   }
@@ skipping 9653 matching lines @@
     group_->set_draw_buffer(bufs[0]);
   }
 }
 
 void GLES2DecoderImpl::DoLoseContextCHROMIUM(GLenum current, GLenum other) {
   group_->LoseContexts(other);
   reset_status_ = current;
   current_decoder_error_ = error::kLostContext;
 }
 
+void GLES2DecoderImpl::DoMatrixLoadfCHROMIUM(GLenum matrix_mode,
+                                             const GLfloat* matrix) {
+  DCHECK(matrix_mode == GL_PATH_PROJECTION_CHROMIUM ||
+         matrix_mode == GL_PATH_MODELVIEW_CHROMIUM);
+  if (!features().chromium_path_rendering) {
+    LOCAL_SET_GL_ERROR(GL_INVALID_OPERATION,
+                       "glMatrixLoadfCHROMIUM",
+                       "function not available");
+    return;
+  }
+
+  GLfloat* target_matrix = matrix_mode == GL_PATH_PROJECTION_CHROMIUM
+                               ? state_.projection_matrix
+                               : state_.modelview_matrix;
+  memcpy(target_matrix, matrix, sizeof(GLfloat) * 16);
+  // The matrix_mode is either GL_PATH_MODELVIEW_NV or GL_PATH_PROJECTION_NV
+  // since the values of the _NV and _CHROMIUM tokens match.
+  glMatrixLoadfEXT(matrix_mode, matrix);
+}
+
+void GLES2DecoderImpl::DoMatrixLoadIdentityCHROMIUM(GLenum matrix_mode) {
+  DCHECK(matrix_mode == GL_PATH_PROJECTION_CHROMIUM ||
+         matrix_mode == GL_PATH_MODELVIEW_CHROMIUM);
+
+  if (!features().chromium_path_rendering) {
+    LOCAL_SET_GL_ERROR(GL_INVALID_OPERATION,
+                       "glMatrixLoadIdentityCHROMIUM",
+                       "function not available");
+    return;
+  }
+
+  static GLfloat kIdentityMatrix[16] = {1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f,
+                                        0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f,
+                                        0.0f, 0.0f, 0.0f, 1.0f};
+
+  GLfloat* target_matrix = matrix_mode == GL_PATH_PROJECTION_CHROMIUM
+                               ? state_.projection_matrix
+                               : state_.modelview_matrix;
+  memcpy(target_matrix, kIdentityMatrix, sizeof(kIdentityMatrix));
+  // The matrix_mode is either GL_PATH_MODELVIEW_NV or GL_PATH_PROJECTION_NV
+  // since the values of the _NV and _CHROMIUM tokens match.
+  glMatrixLoadIdentityEXT(matrix_mode);
+}
+
 bool GLES2DecoderImpl::ValidateAsyncTransfer(
     const char* function_name,
     TextureRef* texture_ref,
     GLenum target,
     GLint level,
     const void * data) {
   // We only support async uploads to 2D textures for now.
   if (GL_TEXTURE_2D != target) {
     LOCAL_SET_GL_ERROR_INVALID_ENUM(function_name, target, "target");
     return false;
@@ skipping 296 matching lines @@
   }
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu