ui: Add support for creating GLImage instances from shared memory pools.

ui/gl/gl_image_shared_memory_unittest.cc

 // Copyright 2015 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 "base/memory/shared_memory.h"
+#include "base/sys_info.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gl/gl_image_shared_memory.h"
 #include "ui/gl/test/gl_image_test_template.h"
 
 namespace gfx {
 namespace {
 
 template <BufferFormat format>
 class GLImageSharedMemoryTestDelegate {
  public:
   scoped_refptr<GLImage> CreateSolidColorImage(const Size& size,
                                                const uint8_t color[4]) const {
     DCHECK_EQ(NumberOfPlanesForBufferFormat(format), 1u);
     base::SharedMemory shared_memory;
     bool rv = shared_memory.CreateAndMapAnonymous(
         BufferSizeForBufferFormat(size, format));
     DCHECK(rv);
     GLImageTestSupport::SetBufferDataToColor(
         size.width(), size.height(),
         static_cast<int>(RowSizeForBufferFormat(size.width(), format, 0)),
         format, color, reinterpret_cast<uint8_t*>(shared_memory.memory()));
     scoped_refptr<GLImageSharedMemory> image(new GLImageSharedMemory(
         size, GLImageMemory::GetInternalFormatForTesting(format)));
     rv = image->Initialize(
         base::SharedMemory::DuplicateHandle(shared_memory.handle()),
-        GenericSharedMemoryId(0), format);
+        GenericSharedMemoryId(0), format, 0);
     EXPECT_TRUE(rv);
     return image;
   }
 };
 
 using GLImageTestTypes =
     testing::Types<GLImageSharedMemoryTestDelegate<BufferFormat::RGBX_8888>,
                    GLImageSharedMemoryTestDelegate<BufferFormat::RGBA_8888>,
                    GLImageSharedMemoryTestDelegate<BufferFormat::BGRX_8888>,
                    GLImageSharedMemoryTestDelegate<BufferFormat::BGRA_8888>>;
 
 INSTANTIATE_TYPED_TEST_CASE_P(GLImageSharedMemory,
                               GLImageTest,
                               GLImageTestTypes);
 
 INSTANTIATE_TYPED_TEST_CASE_P(GLImageSharedMemory,
                               GLImageCopyTest,
                               GLImageTestTypes);
 
+class GLImageSharedMemoryPoolTestDelegate {
+ public:
+  scoped_refptr<GLImage> CreateSolidColorImage(const Size& size,
+                                               const uint8_t color[4]) const {
+    // Create a shared memory segment that is 2 pages larger than image.
+    size_t pool_size =
+        BufferSizeForBufferFormat(size, BufferFormat::RGBA_8888) +
+        base::SysInfo::VMAllocationGranularity() * 3;
+    base::SharedMemory shared_memory;
+    bool rv = shared_memory.CreateAndMapAnonymous(pool_size);
+    DCHECK(rv);
+    // Initialize memory to a value that is easy to recognize if test fails.
+    memset(shared_memory.memory(), 0x55, pool_size);
+    // Place buffer at a non-zero non-page-aligned offset in shared memory.
+    size_t buffer_offset = 3 * base::SysInfo::VMAllocationGranularity() / 2;
+    GLImageTestSupport::SetBufferDataToColor(
+        size.width(), size.height(),
+        static_cast<int>(
+            RowSizeForBufferFormat(size.width(), BufferFormat::RGBA_8888, 0)),
+        BufferFormat::RGBA_8888, color,
+        reinterpret_cast<uint8_t*>(shared_memory.memory()) + buffer_offset);
+    scoped_refptr<GLImageSharedMemory> image(
+        new GLImageSharedMemory(size, GL_RGBA));
+    rv = image->Initialize(
+        base::SharedMemory::DuplicateHandle(shared_memory.handle()),
+        GenericSharedMemoryId(0), BufferFormat::RGBA_8888, buffer_offset);
+    EXPECT_TRUE(rv);
+    return image;
+  }
+};
+
+INSTANTIATE_TYPED_TEST_CASE_P(GLImageSharedMemoryPool,
+                              GLImageCopyTest,
+                              GLImageSharedMemoryPoolTestDelegate);
+
 }  // namespace
 }  // namespace gfx