android_util.cpp | Explore in Territory

//
// Copyright 2018 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

// android_util.cpp: Utilities for the using the Android platform

#include "common/android_util.h"
#include "common/debug.h"

#if defined(ANGLE_PLATFORM_ANDROID)
#    include <sys/system_properties.h>
#endif

#if defined(ANGLE_PLATFORM_ANDROID) && __ANDROID_API__ >= 26
#define ANGLE_AHARDWARE_BUFFER_SUPPORT
// NDK header file for access to Android Hardware Buffers
#    include <android/hardware_buffer.h>
#endif

// Taken from cutils/native_handle.h:
// https://android.googlesource.com/platform/system/core/+/master/libcutils/include/cutils/native_handle.h
native_handle_t;

// Taken from nativebase/nativebase.h
// https://android.googlesource.com/platform/frameworks/native/+/master/libs/nativebase/include/nativebase/nativebase.h
buffer_handle_t;

android_native_base_t;

ANativeWindowBuffer_t;

namespace angle
{

namespace android
{

namespace
{

// In the Android system:
// - AHardwareBuffer is essentially a typedef of GraphicBuffer. Conversion functions simply
// reinterpret_cast.
// - GraphicBuffer inherits from two base classes, ANativeWindowBuffer and RefBase.
//
// GraphicBuffer implements a getter for ANativeWindowBuffer (getNativeBuffer) by static_casting
// itself to its base class ANativeWindowBuffer. The offset of the ANativeWindowBuffer pointer
// from the GraphicBuffer pointer is 16 bytes. This is likely due to two pointers: The vtable of
// GraphicBuffer and the one pointer member of the RefBase class.
//
// This is not future proof at all. We need to look into getting utilities added to Android to
// perform this cast for us.
constexpr int kAHardwareBufferToANativeWindowBufferOffset = …;

template <typename T1, typename T2>
T1 *OffsetPointer(T2 *ptr, int bytes)
{ … }

GLenum GetPixelFormatInfo(int pixelFormat, bool *isYUV)
{ … }

}  // anonymous namespace

ANativeWindowBuffer *ClientBufferToANativeWindowBuffer(EGLClientBuffer clientBuffer)
{ … }

uint64_t GetAHBUsage(int eglNativeBufferUsage)
{ … }

EGLClientBuffer CreateEGLClientBufferFromAHardwareBuffer(int width,
                                                         int height,
                                                         int depth,
                                                         int androidFormat,
                                                         int usage)
{ … }

void GetANativeWindowBufferProperties(const ANativeWindowBuffer *buffer,
                                      int *width,
                                      int *height,
                                      int *depth,
                                      int *pixelFormat,
                                      uint64_t *usage)
{ … }

GLenum NativePixelFormatToGLInternalFormat(int pixelFormat)
{ … }

int GLInternalFormatToNativePixelFormat(GLenum internalFormat)
{ … }

bool NativePixelFormatIsYUV(int pixelFormat)
{ … }

AHardwareBuffer *ANativeWindowBufferToAHardwareBuffer(ANativeWindowBuffer *windowBuffer)
{ … }

EGLClientBuffer AHardwareBufferToClientBuffer(const AHardwareBuffer *hardwareBuffer)
{ … }

AHardwareBuffer *ClientBufferToAHardwareBuffer(EGLClientBuffer clientBuffer)
{ … }

bool GetSystemProperty(const char *propertyName, std::string *value)
{ … }

}  // namespace android
}  // namespace angle
chromium/third_party/angle/src/common/android_util.cpp
