1 files changed, 417 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/common/android_util.cpp b/gfx/angle/checkout/src/common/android_util.cpp
new file mode 100644
index 0000000000..436b1b798a
--- /dev/null
+++ b/gfx/angle/checkout/src/common/android_util.cpp
@@ -0,0 +1,417 @@
+//
+// 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"
+
+#include <cstdint>
+
+#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
+typedef struct native_handle
+{
+    int version; /* sizeof(native_handle_t) */
+    int numFds;  /* number of file-descriptors at &data[0] */
+    int numInts; /* number of ints at &data[numFds] */
+#if defined(__clang__)
+#    pragma clang diagnostic push
+#    pragma clang diagnostic ignored "-Wzero-length-array"
+#elif defined(_MSC_VER)
+#    pragma warning(push)
+#    pragma warning(disable : 4200)
+#endif
+    int data[0]; /* numFds + numInts ints */
+#if defined(__clang__)
+#    pragma clang diagnostic pop
+#elif defined(_MSC_VER)
+#    pragma warning(pop)
+#endif
+} native_handle_t;
+
+// Taken from nativebase/nativebase.h
+// https://android.googlesource.com/platform/frameworks/native/+/master/libs/nativebase/include/nativebase/nativebase.h
+typedef const native_handle_t *buffer_handle_t;
+
+typedef struct android_native_base_t
+{
+    /* a magic value defined by the actual EGL native type */
+    int magic;
+    /* the sizeof() of the actual EGL native type */
+    int version;
+    void *reserved[4];
+    /* reference-counting interface */
+    void (*incRef)(struct android_native_base_t *base);
+    void (*decRef)(struct android_native_base_t *base);
+} android_native_base_t;
+
+typedef struct ANativeWindowBuffer
+{
+    struct android_native_base_t common;
+    int width;
+    int height;
+    int stride;
+    int format;
+    int usage_deprecated;
+    uintptr_t layerCount;
+    void *reserved[1];
+    const native_handle_t *handle;
+    uint64_t usage;
+    // we needed extra space for storing the 64-bits usage flags
+    // the number of slots to use from reserved_proc depends on the
+    // architecture.
+    void *reserved_proc[8 - (sizeof(uint64_t) / sizeof(void *))];
+} ANativeWindowBuffer_t;
+
+// Taken from android/hardware_buffer.h
+// https://android.googlesource.com/platform/frameworks/native/+/master/libs/nativewindow/include/android/hardware_buffer.h
+
+// AHARDWAREBUFFER_FORMAT_B8G8R8A8_UNORM AHARDWAREBUFFER_FORMAT_B4G4R4A4_UNORM,
+// AHARDWAREBUFFER_FORMAT_B5G5R5A1_UNORM formats were deprecated and re-added explicitly.
+
+// clang-format off
+/**
+ * Buffer pixel formats.
+ */
+enum {
+
+#ifndef ANGLE_AHARDWARE_BUFFER_SUPPORT
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_R8G8B8A8_UNORM
+     *   OpenGL ES: GL_RGBA8
+     */
+    AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM           = 1,
+
+    /**
+     * 32 bits per pixel, 8 bits per channel format where alpha values are
+     * ignored (always opaque).
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_R8G8B8A8_UNORM
+     *   OpenGL ES: GL_RGB8
+     */
+    AHARDWAREBUFFER_FORMAT_R8G8B8X8_UNORM           = 2,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_R8G8B8_UNORM
+     *   OpenGL ES: GL_RGB8
+     */
+    AHARDWAREBUFFER_FORMAT_R8G8B8_UNORM             = 3,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_R5G6B5_UNORM_PACK16
+     *   OpenGL ES: GL_RGB565
+     */
+    AHARDWAREBUFFER_FORMAT_R5G6B5_UNORM             = 4,
+#endif  // ANGLE_AHARDWARE_BUFFER_SUPPORT
+
+    AHARDWAREBUFFER_FORMAT_B8G8R8A8_UNORM           = 5,
+    AHARDWAREBUFFER_FORMAT_B5G5R5A1_UNORM           = 6,
+    AHARDWAREBUFFER_FORMAT_B4G4R4A4_UNORM           = 7,
+
+#ifndef ANGLE_AHARDWARE_BUFFER_SUPPORT
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_R16G16B16A16_SFLOAT
+     *   OpenGL ES: GL_RGBA16F
+     */
+    AHARDWAREBUFFER_FORMAT_R16G16B16A16_FLOAT       = 0x16,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_A2B10G10R10_UNORM_PACK32
+     *   OpenGL ES: GL_RGB10_A2
+     */
+    AHARDWAREBUFFER_FORMAT_R10G10B10A2_UNORM        = 0x2b,
+
+    /**
+     * An opaque binary blob format that must have height 1, with width equal to
+     * the buffer size in bytes.
+     */
+    AHARDWAREBUFFER_FORMAT_BLOB                     = 0x21,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_D16_UNORM
+     *   OpenGL ES: GL_DEPTH_COMPONENT16
+     */
+    AHARDWAREBUFFER_FORMAT_D16_UNORM                = 0x30,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_X8_D24_UNORM_PACK32
+     *   OpenGL ES: GL_DEPTH_COMPONENT24
+     */
+    AHARDWAREBUFFER_FORMAT_D24_UNORM                = 0x31,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_D24_UNORM_S8_UINT
+     *   OpenGL ES: GL_DEPTH24_STENCIL8
+     */
+    AHARDWAREBUFFER_FORMAT_D24_UNORM_S8_UINT        = 0x32,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_D32_SFLOAT
+     *   OpenGL ES: GL_DEPTH_COMPONENT32F
+     */
+    AHARDWAREBUFFER_FORMAT_D32_FLOAT                = 0x33,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_D32_SFLOAT_S8_UINT
+     *   OpenGL ES: GL_DEPTH32F_STENCIL8
+     */
+    AHARDWAREBUFFER_FORMAT_D32_FLOAT_S8_UINT        = 0x34,
+
+    /**
+     * Corresponding formats:
+     *   Vulkan: VK_FORMAT_S8_UINT
+     *   OpenGL ES: GL_STENCIL_INDEX8
+     */
+    AHARDWAREBUFFER_FORMAT_S8_UINT                  = 0x35,
+
+    /**
+     * YUV 420 888 format.
+     * Must have an even width and height. Can be accessed in OpenGL
+     * shaders through an external sampler. Does not support mip-maps
+     * cube-maps or multi-layered textures.
+     */
+    AHARDWAREBUFFER_FORMAT_Y8Cb8Cr8_420             = 0x23,
+
+#endif  // ANGLE_AHARDWARE_BUFFER_SUPPORT
+};
+// clang-format on
+
+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 = static_cast<int>(sizeof(void *)) * 2;
+
+template <typename T1, typename T2>
+T1 *offsetPointer(T2 *ptr, int bytes)
+{
+    return reinterpret_cast<T1 *>(reinterpret_cast<intptr_t>(ptr) + bytes);
+}
+
+GLenum getPixelFormatInfo(int pixelFormat, bool *isYUV)
+{
+    *isYUV = false;
+    switch (pixelFormat)
+    {
+        case AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM:
+            return GL_RGBA8;
+        case AHARDWAREBUFFER_FORMAT_R8G8B8X8_UNORM:
+            return GL_RGB8;
+        case AHARDWAREBUFFER_FORMAT_R8G8B8_UNORM:
+            return GL_RGB8;
+        case AHARDWAREBUFFER_FORMAT_R5G6B5_UNORM:
+            return GL_RGB565;
+        case AHARDWAREBUFFER_FORMAT_B8G8R8A8_UNORM:
+            return GL_BGRA8_EXT;
+        case AHARDWAREBUFFER_FORMAT_B5G5R5A1_UNORM:
+            return GL_RGB5_A1;
+        case AHARDWAREBUFFER_FORMAT_B4G4R4A4_UNORM:
+            return GL_RGBA4;
+        case AHARDWAREBUFFER_FORMAT_R16G16B16A16_FLOAT:
+            return GL_RGBA16F;
+        case AHARDWAREBUFFER_FORMAT_R10G10B10A2_UNORM:
+            return GL_RGB10_A2;
+        case AHARDWAREBUFFER_FORMAT_BLOB:
+            return GL_NONE;
+        case AHARDWAREBUFFER_FORMAT_D16_UNORM:
+            return GL_DEPTH_COMPONENT16;
+        case AHARDWAREBUFFER_FORMAT_D24_UNORM:
+            return GL_DEPTH_COMPONENT24;
+        case AHARDWAREBUFFER_FORMAT_D24_UNORM_S8_UINT:
+            return GL_DEPTH24_STENCIL8;
+        case AHARDWAREBUFFER_FORMAT_D32_FLOAT:
+            return GL_DEPTH_COMPONENT32F;
+        case AHARDWAREBUFFER_FORMAT_D32_FLOAT_S8_UINT:
+            return GL_DEPTH32F_STENCIL8;
+        case AHARDWAREBUFFER_FORMAT_S8_UINT:
+            return GL_STENCIL_INDEX8;
+        case AHARDWAREBUFFER_FORMAT_Y8Cb8Cr8_420:
+            *isYUV = true;
+            return GL_RGB8;
+        default:
+            // Treat unknown formats as RGB. They are vendor-specific YUV formats that would sample
+            // as RGB.
+            WARN() << "Unknown pixelFormat: " << pixelFormat << ". Treating as RGB8";
+            *isYUV = true;
+            return GL_RGB8;
+    }
+}
+
+}  // anonymous namespace
+
+namespace angle
+{
+
+namespace android
+{
+
+ANativeWindowBuffer *ClientBufferToANativeWindowBuffer(EGLClientBuffer clientBuffer)
+{
+    return reinterpret_cast<ANativeWindowBuffer *>(clientBuffer);
+}
+
+uint64_t GetAHBUsage(int eglNativeBufferUsage)
+{
+    uint64_t ahbUsage = 0;
+#if defined(ANGLE_AHARDWARE_BUFFER_SUPPORT)
+    if (eglNativeBufferUsage & EGL_NATIVE_BUFFER_USAGE_PROTECTED_BIT_ANDROID)
+    {
+        ahbUsage |= AHARDWAREBUFFER_USAGE_PROTECTED_CONTENT;
+    }
+    if (eglNativeBufferUsage & EGL_NATIVE_BUFFER_USAGE_RENDERBUFFER_BIT_ANDROID)
+    {
+        ahbUsage |= AHARDWAREBUFFER_USAGE_GPU_FRAMEBUFFER;
+    }
+    if (eglNativeBufferUsage & EGL_NATIVE_BUFFER_USAGE_TEXTURE_BIT_ANDROID)
+    {
+        ahbUsage |= AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE;
+    }
+#endif  // ANGLE_AHARDWARE_BUFFER_SUPPORT
+    return ahbUsage;
+}
+
+EGLClientBuffer CreateEGLClientBufferFromAHardwareBuffer(int width,
+                                                         int height,
+                                                         int depth,
+                                                         int androidFormat,
+                                                         int usage)
+{
+#if defined(ANGLE_AHARDWARE_BUFFER_SUPPORT)
+
+    // The height and width are number of pixels of size format
+    AHardwareBuffer_Desc aHardwareBufferDescription = {};
+    aHardwareBufferDescription.width                = static_cast<uint32_t>(width);
+    aHardwareBufferDescription.height               = static_cast<uint32_t>(height);
+    aHardwareBufferDescription.layers               = static_cast<uint32_t>(depth);
+    aHardwareBufferDescription.format               = androidFormat;
+    aHardwareBufferDescription.usage                = GetAHBUsage(usage);
+
+    // Allocate memory from Android Hardware Buffer
+    AHardwareBuffer *aHardwareBuffer = nullptr;
+    int res = AHardwareBuffer_allocate(&aHardwareBufferDescription, &aHardwareBuffer);
+    if (res != 0)
+    {
+        return nullptr;
+    }
+
+    return AHardwareBufferToClientBuffer(aHardwareBuffer);
+#endif  // ANGLE_AHARDWARE_BUFFER_SUPPORT
+    return nullptr;
+}
+
+void GetANativeWindowBufferProperties(const ANativeWindowBuffer *buffer,
+                                      int *width,
+                                      int *height,
+                                      int *depth,
+                                      int *pixelFormat)
+{
+    *width       = buffer->width;
+    *height      = buffer->height;
+    *depth       = static_cast<int>(buffer->layerCount);
+    *height      = buffer->height;
+    *pixelFormat = buffer->format;
+}
+
+GLenum NativePixelFormatToGLInternalFormat(int pixelFormat)
+{
+    bool isYuv = false;
+    return getPixelFormatInfo(pixelFormat, &isYuv);
+}
+
+int GLInternalFormatToNativePixelFormat(GLenum internalFormat)
+{
+    switch (internalFormat)
+    {
+        case GL_RGBA8:
+            return AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM;
+        case GL_RGB8:
+            return AHARDWAREBUFFER_FORMAT_R8G8B8X8_UNORM;
+        case GL_RGB565:
+            return AHARDWAREBUFFER_FORMAT_R5G6B5_UNORM;
+        case GL_BGRA8_EXT:
+            return AHARDWAREBUFFER_FORMAT_B8G8R8A8_UNORM;
+        case GL_RGB5_A1:
+            return AHARDWAREBUFFER_FORMAT_B5G5R5A1_UNORM;
+        case GL_RGBA4:
+            return AHARDWAREBUFFER_FORMAT_B4G4R4A4_UNORM;
+        case GL_RGBA16F:
+            return AHARDWAREBUFFER_FORMAT_R16G16B16A16_FLOAT;
+        case GL_RGB10_A2:
+            return AHARDWAREBUFFER_FORMAT_R10G10B10A2_UNORM;
+        case GL_NONE:
+            return AHARDWAREBUFFER_FORMAT_BLOB;
+        case GL_DEPTH_COMPONENT16:
+            return AHARDWAREBUFFER_FORMAT_D16_UNORM;
+        case GL_DEPTH_COMPONENT24:
+            return AHARDWAREBUFFER_FORMAT_D24_UNORM;
+        case GL_DEPTH24_STENCIL8:
+            return AHARDWAREBUFFER_FORMAT_D24_UNORM_S8_UINT;
+        case GL_DEPTH_COMPONENT32F:
+            return AHARDWAREBUFFER_FORMAT_D32_FLOAT;
+        case GL_DEPTH32F_STENCIL8:
+            return AHARDWAREBUFFER_FORMAT_D32_FLOAT_S8_UINT;
+        case GL_STENCIL_INDEX8:
+            return AHARDWAREBUFFER_FORMAT_S8_UINT;
+        default:
+            WARN() << "Unknown internalFormat: " << internalFormat << ". Treating as 0";
+            return 0;
+    }
+}
+
+bool NativePixelFormatIsYUV(int pixelFormat)
+{
+    bool isYuv = false;
+    getPixelFormatInfo(pixelFormat, &isYuv);
+    return isYuv;
+}
+
+AHardwareBuffer *ANativeWindowBufferToAHardwareBuffer(ANativeWindowBuffer *windowBuffer)
+{
+    return offsetPointer<AHardwareBuffer>(windowBuffer,
+                                          -kAHardwareBufferToANativeWindowBufferOffset);
+}
+
+EGLClientBuffer AHardwareBufferToClientBuffer(const AHardwareBuffer *hardwareBuffer)
+{
+    return offsetPointer<EGLClientBuffer>(hardwareBuffer,
+                                          kAHardwareBufferToANativeWindowBufferOffset);
+}
+
+AHardwareBuffer *ClientBufferToAHardwareBuffer(EGLClientBuffer clientBuffer)
+{
+    return offsetPointer<AHardwareBuffer>(clientBuffer,
+                                          -kAHardwareBufferToANativeWindowBufferOffset);
+}
+}  // namespace android
+}  // namespace angle