command_buffer: Implement path rendering functions for CHROMIUM_path_rendering

gpu/command_buffer/service/path_manager_unittest.cc

Index: gpu/command_buffer/service/path_manager_unittest.cc
diff --git a/gpu/command_buffer/service/path_manager_unittest.cc b/gpu/command_buffer/service/path_manager_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5a5d90f6ae2a2f744cfc300f55fb5ef6f578d9b8
--- /dev/null
+++ b/gpu/command_buffer/service/path_manager_unittest.cc
@@ -0,0 +1,136 @@
+// Copyright (c) 2014 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/path_manager.h"
+
+#include "base/memory/scoped_ptr.h"
+#include "gpu/command_buffer/service/feature_info.h"
+#include "gpu/command_buffer/service/gpu_service_test.h"
+#include "gpu/command_buffer/service/mocks.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gl/gl_mock.h"
+
+namespace gpu {
+namespace gles2 {
+
+class PathManagerTest : public GpuServiceTest {
+ public:
+  PathManagerTest() : feature_info_(new FeatureInfo()) {}
+
+  virtual ~PathManagerTest() override {}
+
+ protected:
+  virtual void SetUp() override {
+    GpuServiceTest::SetUp();
+    manager_.reset(new PathManager());
+  }
+
+  virtual void TearDown() {
+    manager_->Destroy(true);
+    manager_.reset();
+    GpuServiceTest::TearDown();
+  }
+
+  scoped_refptr<FeatureInfo> feature_info_;
+  scoped_ptr<PathManager> manager_;
+};
+
+TEST_F(PathManagerTest, Basic) {
+  const GLuint kClient1Id = 1;
+  const GLuint kService1Id = 11;
+  const GLuint kClient2Id = 2;
+  GLuint service_id = 0;
+  manager_->CreatePathRange(kClient1Id, kClient1Id, kService1Id);
+  ASSERT_TRUE(manager_->HasPathsInRange(kClient1Id, kClient1Id));
+  EXPECT_TRUE(manager_->GetPath(kClient1Id, &service_id));
+  EXPECT_EQ(kService1Id, service_id);
+
+  // Check we get nothing for a non-existent texture.
+  service_id = 123u;
+  ASSERT_FALSE(manager_->HasPathsInRange(kClient2Id, kClient2Id));
+  EXPECT_FALSE(manager_->GetPath(kClient2Id, &service_id));
+  EXPECT_EQ(123u, service_id);
+
+  // Check trying to a remove non-existent textures does not crash.
+  manager_->RemovePaths(kClient2Id, kClient2Id);
+
+  // Check that it gets deleted when the last reference is released.
+  EXPECT_CALL(*gl_, DeletePathsNV(kService1Id, 1))
+      .Times(1)
+      .RetiresOnSaturation();
+
+  // Check we can't get the texture after we remove it.
+  manager_->RemovePaths(kClient1Id, kClient1Id);
+  ASSERT_FALSE(manager_->HasPathsInRange(kClient1Id, kClient1Id));
+  EXPECT_FALSE(manager_->GetPath(kClient1Id, &service_id));
+}
+
+// Tests that path manager does not merge ranges that contain service ids that
+// in such a way that prevent the merging. Path ranges A and B can be merged if
+// * client ids of B start immediately after the last client id of A
+// * service ids of B start immediately after the last service id of A
+// and similarly for the 'before' case.
+TEST_F(PathManagerTest, NonContiguousServiceIds) {
+  const GLuint kMergeCheckRange = 54;
+
+  const struct {
+    GLuint first_client_id;
+    GLuint last_client_id;
+    GLuint first_service_id;
+  } kIdRanges[] = {{500, 1000, 900}, {1001, 1155, 1}, {200, 499, 4888}};
+  for (auto& range : kIdRanges) {
+    manager_->CreatePathRange(
+        range.first_client_id, range.last_client_id, range.first_service_id);
+    ASSERT_TRUE(manager_->HasPathsInRange(range.first_client_id,
+                                          range.first_client_id));
+    ASSERT_TRUE(
+        manager_->HasPathsInRange(range.last_client_id, range.last_client_id));
+    ASSERT_TRUE(
+        manager_->HasPathsInRange(range.first_client_id, range.last_client_id));
+    GLuint service_id = 0u;
+    EXPECT_TRUE(manager_->GetPath(range.first_client_id + 5u, &service_id));
+    EXPECT_EQ(range.first_service_id + 5u, service_id);
+  }
+
+  // Insert a mergeable range last, to check that merges
+  // work. Otherwise the test could succeed because merges were not
+  // working.
+  auto& merge_candidate = kIdRanges[1];
+  GLuint merge_candidate_range =
+      merge_candidate.last_client_id - merge_candidate.first_client_id + 1;
+  manager_->CreatePathRange(
+      merge_candidate.last_client_id + 1,
+      merge_candidate.last_client_id + kMergeCheckRange,
+      merge_candidate.first_service_id + merge_candidate_range);
+
+  // We detect that ranges were not merged accidentally by detecting individual
+  // deletes.
+  for (auto& range : kIdRanges) {
+    if (&range == &merge_candidate)
+      continue;
+    GLsizei range_amount = range.last_client_id - range.first_client_id + 1;
+    EXPECT_CALL(*gl_, DeletePathsNV(range.first_service_id, range_amount))
+        .Times(1)
+        .RetiresOnSaturation();
+  }
+
+  // Just a check that merges work.
+  EXPECT_CALL(*gl_,
+              DeletePathsNV(merge_candidate.first_service_id,
+                            merge_candidate_range + kMergeCheckRange))
+      .Times(1)
+      .RetiresOnSaturation();
+
+  // Remove all ids. This should cause the expected amount of DeletePathsNV
+  // calls.
+  manager_->RemovePaths(1, std::numeric_limits<GLsizei>::max());
+
+  for (auto& range : kIdRanges) {
+    ASSERT_FALSE(
+        manager_->HasPathsInRange(range.first_client_id, range.last_client_id));
+  }
+}
+
+}  // namespace gles2
+}  // namespace gpu