// 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 <stddef.h>
#include <stdint.h>

#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 gl {
namespace {

template <gfx::BufferFormat format>
class GLImageSharedMemoryTestDelegate {
 public:
  scoped_refptr<gl::GLImage> CreateSolidColorImage(
      const gfx::Size& size,
      const uint8_t color[4]) const {
    DCHECK_EQ(NumberOfPlanesForBufferFormat(format), 1u);
    base::SharedMemory shared_memory;
    bool rv = shared_memory.CreateAndMapAnonymous(
        gfx::BufferSizeForBufferFormat(size, format));
    DCHECK(rv);
    GLImageTestSupport::SetBufferDataToColor(
        size.width(), size.height(),
        static_cast<int>(RowSizeForBufferFormat(size.width(), format, 0)), 0,
        format, color, reinterpret_cast<uint8_t*>(shared_memory.memory()));
    scoped_refptr<gl::GLImageSharedMemory> image(new gl::GLImageSharedMemory(
        size, gl::GLImageMemory::GetInternalFormatForTesting(format)));
    rv = image->Initialize(
        base::SharedMemory::DuplicateHandle(shared_memory.handle()),
        gfx::GenericSharedMemoryId(0), format, 0,
        gfx::RowSizeForBufferFormat(size.width(), format, 0));
    EXPECT_TRUE(rv);
    return image;
  }

  unsigned GetTextureTarget() const { return GL_TEXTURE_2D; }
};

using GLImageTestTypes = testing::Types<
    GLImageSharedMemoryTestDelegate<gfx::BufferFormat::RGBX_8888>,
    GLImageSharedMemoryTestDelegate<gfx::BufferFormat::RGBA_8888>,
    GLImageSharedMemoryTestDelegate<gfx::BufferFormat::BGRX_8888>,
    GLImageSharedMemoryTestDelegate<gfx::BufferFormat::BGRA_8888>>;

INSTANTIATE_TYPED_TEST_CASE_P(GLImageSharedMemory,
                              GLImageTest,
                              GLImageTestTypes);

INSTANTIATE_TYPED_TEST_CASE_P(GLImageSharedMemory,
                              GLImageCopyTest,
                              GLImageTestTypes);

class GLImageSharedMemoryPoolTestDelegate {
 public:
  scoped_refptr<gl::GLImage> CreateSolidColorImage(
      const gfx::Size& size,
      const uint8_t color[4]) const {
    // Create a shared memory segment that holds an image with a stride that is
    // twice the row size and 2 pages larger than image.
    size_t stride = gfx::RowSizeForBufferFormat(
                        size.width(), gfx::BufferFormat::RGBA_8888, 0) *
                    2;
    size_t pool_size =
        stride * size.height() + 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>(stride), 0,
        gfx::BufferFormat::RGBA_8888, color,
        reinterpret_cast<uint8_t*>(shared_memory.memory()) + buffer_offset);
    scoped_refptr<gl::GLImageSharedMemory> image(
        new gl::GLImageSharedMemory(size, GL_RGBA));
    rv = image->Initialize(
        base::SharedMemory::DuplicateHandle(shared_memory.handle()),
        gfx::GenericSharedMemoryId(0), gfx::BufferFormat::RGBA_8888,
        buffer_offset, stride);
    EXPECT_TRUE(rv);
    return image;
  }

  unsigned GetTextureTarget() const { return GL_TEXTURE_2D; }
};

INSTANTIATE_TYPED_TEST_CASE_P(GLImageSharedMemoryPool,
                              GLImageCopyTest,
                              GLImageSharedMemoryPoolTestDelegate);

}  // namespace
}  // namespace gl