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// 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.
#ifndef UI_GL_GL_IMAGE_H_
#define UI_GL_GL_IMAGE_H_
#include <stdint.h>
#include <string>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "build/build_config.h"
#include "ui/gfx/color_space.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/rect_f.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/gpu_fence.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gfx/overlay_transform.h"
#include "ui/gl/gl_export.h"
#if defined(OS_ANDROID)
#include <android/hardware_buffer.h>
#include <memory>
#include "base/android/scoped_hardware_buffer_handle.h"
#include "base/files/scoped_file.h"
namespace base {
namespace trace_event {
class ProcessMemoryDump;
} // namespace trace_event
namespace android {
class ScopedHardwareBufferFenceSync;
} // namespace android
} // namespace base
namespace gfx {
class GpuFence;
namespace gl {
// Encapsulates an image that can be bound and/or copied to a texture, hiding
// platform specific management.
class GL_EXPORT GLImage : public base::RefCounted<GLImage> {
GLImage() {}
// Get the size of the image.
virtual gfx::Size GetSize() = 0;
// Get the internal format of the image.
virtual unsigned GetInternalFormat() = 0;
enum BindOrCopy { BIND, COPY };
// Returns whether this image is meant to be bound or copied to textures. The
// suggested method is not guaranteed to succeed, but the alternative will
// definitely fail.
virtual BindOrCopy ShouldBindOrCopy() = 0;
// Bind image to texture currently bound to |target|. Returns true on success.
// It is valid for an implementation to always return false.
virtual bool BindTexImage(unsigned target) = 0;
// Bind image to texture currently bound to |target|, forcing the texture's
// internal format to the specified one. This is a feature not available on
// all platforms. Returns true on success. It is valid for an implementation
// to always return false.
virtual bool BindTexImageWithInternalformat(unsigned target,
unsigned internalformat);
// Release image from texture currently bound to |target|.
virtual void ReleaseTexImage(unsigned target) = 0;
// Define texture currently bound to |target| by copying image into it.
// Returns true on success. It is valid for an implementation to always
// return false.
virtual bool CopyTexImage(unsigned target) = 0;
// Copy |rect| of image to |offset| in texture currently bound to |target|.
// Returns true on success. It is valid for an implementation to always
// return false.
virtual bool CopyTexSubImage(unsigned target,
const gfx::Point& offset,
const gfx::Rect& rect) = 0;
// Schedule image as an overlay plane to be shown at swap time for |widget|.
virtual 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) = 0;
// Set the color space when image is used as an overlay.
virtual void SetColorSpace(const gfx::ColorSpace& color_space);
const gfx::ColorSpace& color_space() const { return color_space_; }
// Flush any preceding rendering for the image.
virtual void Flush() = 0;
// Dumps information about the memory backing the GLImage to a dump named
// |dump_name|.
virtual void OnMemoryDump(base::trace_event::ProcessMemoryDump* pmd,
uint64_t process_tracing_id,
const std::string& dump_name) = 0;
// If this returns true, then the command buffer client has requested a
// CHROMIUM image with internalformat GL_RGB, but the platform only supports
// GL_RGBA. The client is responsible for implementing appropriate
// workarounds. The only support that the command buffer provides is format
// validation during calls to copyTexImage2D and copySubTexImage2D.
// This is a workaround that is not intended to become a permanent part of the
// GLImage API. Theoretically, when Apple fixes their drivers, this can be
// removed.
virtual bool EmulatingRGB() const;
#if defined(OS_ANDROID)
// Provides the buffer backing this image, if it is backed by an
// AHardwareBuffer. The ScopedHardwareBuffer returned may include a fence
// which will be signaled when all pending work for the buffer has been
// finished and it can be safely read from.
// The buffer is guaranteed to be valid until the lifetime of the object
// returned.
virtual std::unique_ptr<base::android::ScopedHardwareBufferFenceSync>
// An identifier for subclasses. Necessary for safe downcasting.
virtual Type GetType() const;
// Workaround for StreamTexture which must be re-copied on each access.
// TODO(ericrk): Remove this once SharedImage transition is complete.
virtual bool HasMutableState() const;
virtual ~GLImage() {}
gfx::ColorSpace color_space_;
friend class base::RefCounted<GLImage>;
} // namespace gl
#endif // UI_GL_GL_IMAGE_H_