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// Copyright 2013 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 <CoreVideo/CVPixelBuffer.h>
#include <IOSurface/IOSurface.h>
#include <stdint.h>
#include "base/mac/scoped_cftyperef.h"
#include "base/macros.h"
#include "base/threading/thread_checker.h"
#include "ui/gfx/buffer_types.h"
#include "ui/gfx/color_space.h"
#include "ui/gfx/generic_shared_memory_id.h"
#include "ui/gl/gl_export.h"
#include "ui/gl/gl_image.h"
#if defined(__OBJC__)
@class CALayer;
typedef void* CALayer;
namespace gl {
class GL_EXPORT GLImageIOSurface : public GLImage {
static GLImageIOSurface* Create(const gfx::Size& size,
unsigned internalformat);
bool Initialize(IOSurfaceRef io_surface,
gfx::GenericSharedMemoryId io_surface_id,
gfx::BufferFormat format);
// IOSurfaces coming from video decode are wrapped in a CVPixelBuffer
// and may be discarded if the owning CVPixelBuffer is destroyed. This
// initialization will ensure that the CVPixelBuffer be retained for the
// lifetime of the GLImage.
bool InitializeWithCVPixelBuffer(CVPixelBufferRef cv_pixel_buffer,
gfx::GenericSharedMemoryId io_surface_id,
gfx::BufferFormat format);
// Overridden from GLImage:
gfx::Size GetSize() override;
unsigned GetInternalFormat() override;
BindOrCopy ShouldBindOrCopy() override;
bool BindTexImage(unsigned target) override;
bool BindTexImageWithInternalformat(unsigned target,
unsigned internalformat) override;
void ReleaseTexImage(unsigned target) override {}
bool CopyTexImage(unsigned target) override;
bool CopyTexSubImage(unsigned target,
const gfx::Point& offset,
const gfx::Rect& rect) override;
bool ScheduleOverlayPlane(gfx::AcceleratedWidget widget,
int z_order,
gfx::OverlayTransform transform,
const gfx::Rect& bounds_rect,
const gfx::RectF& crop_rect,
bool enable_blend,
std::unique_ptr<gfx::GpuFence> gpu_fence) override;
void SetColorSpace(const gfx::ColorSpace& color_space) override;
void Flush() override {}
void OnMemoryDump(base::trace_event::ProcessMemoryDump* pmd,
uint64_t process_tracing_id,
const std::string& dump_name) override;
bool EmulatingRGB() const override;
gfx::GenericSharedMemoryId io_surface_id() const { return io_surface_id_; }
base::ScopedCFTypeRef<IOSurfaceRef> io_surface();
base::ScopedCFTypeRef<CVPixelBufferRef> cv_pixel_buffer();
// Whether checking IOSurfaceIsInUse() will actually provide a meaningful
// signal about whether the Window Server is still using the IOSurface.
bool CanCheckIOSurfaceIsInUse() const;
// For IOSurfaces that need manual conversion to a GL texture before being
// sampled from, specify the color space in which to do the required YUV to
// RGB transformation.
void SetColorSpaceForYUVToRGBConversion(const gfx::ColorSpace& color_space);
static unsigned GetInternalFormatForTesting(gfx::BufferFormat format);
// Downcasts from |image|. Returns |nullptr| on failure.
static GLImageIOSurface* FromGLImage(GLImage* image);
GLImageIOSurface(const gfx::Size& size, unsigned internalformat);
~GLImageIOSurface() override;
virtual bool BindTexImageImpl(unsigned internalformat);
static bool ValidFormat(gfx::BufferFormat format);
Type GetType() const override;
class RGBConverter;
const gfx::Size size_;
// The "internalformat" exposed to the command buffer, which may not be
// "internalformat" requested by the client.
const unsigned internalformat_;
// The "internalformat" requested by the client.
const unsigned client_internalformat_;
gfx::BufferFormat format_;
base::ScopedCFTypeRef<IOSurfaceRef> io_surface_;
base::ScopedCFTypeRef<CVPixelBufferRef> cv_pixel_buffer_;
gfx::GenericSharedMemoryId io_surface_id_;
base::ThreadChecker thread_checker_;
// The default value of Rec. 601 is based on historical shader code.
gfx::ColorSpace color_space_for_yuv_to_rgb_ = gfx::ColorSpace::CreateREC601();
} // namespace gl