Add initial support for NV_path_rendering extension to gpu command buffer

gpu/command_buffer/tests/gl_chromium_path_rendering_unittest.cc

Index: gpu/command_buffer/tests/gl_chromium_path_rendering_unittest.cc
diff --git a/gpu/command_buffer/tests/gl_chromium_path_rendering_unittest.cc b/gpu/command_buffer/tests/gl_chromium_path_rendering_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1d90053fe960b9c07e97482727d16dbf5a83e4a2
--- /dev/null
+++ b/gpu/command_buffer/tests/gl_chromium_path_rendering_unittest.cc
@@ -0,0 +1,110 @@
+// 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 <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+#include <GLES2/gl2extchromium.h>
+#include <cmath>
+
+#include "gpu/command_buffer/tests/gl_manager.h"
+#include "gpu/command_buffer/tests/gl_test_utils.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace gpu {
+
+class CHROMIUMPathRenderingTest : public testing::Test {
+ public:
+  static const GLsizei kResolution = 100;
+
+ protected:
+  virtual void SetUp() {
+    GLManager::Options options;
+    options.size = gfx::Size(kResolution, kResolution);
+    gl_.Initialize(options);
+  }
+
+  virtual void TearDown() { gl_.Destroy(); }
+
+  void ExpectEqualMatrix(const GLfloat* expected, const GLfloat* actual) {
+    for (size_t i = 0; i < 16; ++i) {
+      EXPECT_EQ(expected[i], actual[i]);
+    }
+  }
+  void ExpectEqualMatrix(const GLfloat* expected, const GLint* actual) {
+    for (size_t i = 0; i < 16; ++i) {
+      EXPECT_EQ(static_cast<GLint>(round(expected[i])), actual[i]);
+    }
+  }
+  GLManager gl_;
+};
+
+TEST_F(CHROMIUMPathRenderingTest, TestMatrix) {
+  if (!GLTestHelper::HasExtension("GL_CHROMIUM_path_rendering")) {
+    return;
+  }
+  static const 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};
+  static const GLfloat kSeqMatrix[16] = {
+      0.5f, -0.5f, -0.1f,  -0.8f,  4.4f,   5.5f,   6.6f,   7.7f,
+      8.8f, 9.9f,  10.11f, 11.22f, 12.33f, 13.44f, 14.55f, 15.66f};
+  static const GLenum kMatrixModes[] = {GL_PATH_MODELVIEW_CHROMIUM,
+                                        GL_PATH_PROJECTION_CHROMIUM};
+  static const GLenum kGetMatrixModes[] = {GL_PATH_MODELVIEW_MATRIX_CHROMIUM,
+                                           GL_PATH_PROJECTION_MATRIX_CHROMIUM};
+
+  for (size_t i = 0; i < arraysize(kMatrixModes); ++i) {
+    GLfloat mf[16];
+    GLint mi[16];
+    memset(mf, 0, sizeof(mf));
+    memset(mi, 0, sizeof(mi));
+    glGetFloatv(kGetMatrixModes[i], mf);
+    glGetIntegerv(kGetMatrixModes[i], mi);
+    ExpectEqualMatrix(kIdentityMatrix, mf);
+    ExpectEqualMatrix(kIdentityMatrix, mi);
+
+    glMatrixLoadfCHROMIUM(kMatrixModes[i], kSeqMatrix);
+    memset(mf, 0, sizeof(mf));
+    memset(mi, 0, sizeof(mi));
+    glGetFloatv(kGetMatrixModes[i], mf);
+    glGetIntegerv(kGetMatrixModes[i], mi);
+    ExpectEqualMatrix(kSeqMatrix, mf);
+    ExpectEqualMatrix(kSeqMatrix, mi);
+
+    glMatrixLoadIdentityCHROMIUM(kMatrixModes[i]);
+    memset(mf, 0, sizeof(mf));
+    memset(mi, 0, sizeof(mi));
+    glGetFloatv(kGetMatrixModes[i], mf);
+    glGetIntegerv(kGetMatrixModes[i], mi);
+    ExpectEqualMatrix(kIdentityMatrix, mf);
+    ExpectEqualMatrix(kIdentityMatrix, mi);
+
+    EXPECT_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());
+  }
+}
+
+TEST_F(CHROMIUMPathRenderingTest, TestMatrixErrors) {
+  if (!GLTestHelper::HasExtension("GL_CHROMIUM_path_rendering")) {
+    return;
+  }
+  GLfloat mf[16];
+  memset(mf, 0, sizeof(mf));
+
+  // This should fail.
+  glMatrixLoadfCHROMIUM(GL_PATH_MODELVIEW_CHROMIUM - 1, mf);
+  EXPECT_EQ(static_cast<GLenum>(GL_INVALID_ENUM), glGetError());
+
+  glMatrixLoadfCHROMIUM(GL_PATH_MODELVIEW_CHROMIUM, mf);
+  EXPECT_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());
+
+  // This should fail.
+  glMatrixLoadIdentityCHROMIUM(GL_PATH_PROJECTION_CHROMIUM + 1);
+  EXPECT_EQ(static_cast<GLenum>(GL_INVALID_ENUM), glGetError());
+
+  glMatrixLoadIdentityCHROMIUM(GL_PATH_PROJECTION_CHROMIUM);
+  EXPECT_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());
+}
+
+}  // namespace gpu