1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
|
//
// 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 <cstdint>
// 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] */
int data[0]; /* numFds + numInts ints */
} 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 {
/**
* 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,
AHARDWAREBUFFER_FORMAT_B8G8R8A8_UNORM = 5,
AHARDWAREBUFFER_FORMAT_B5G5R5A1_UNORM = 6,
AHARDWAREBUFFER_FORMAT_B4G4R4A4_UNORM = 7,
/**
* 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,
};
// 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);
}
} // anonymous namespace
namespace angle
{
namespace android
{
ANativeWindowBuffer *ClientBufferToANativeWindowBuffer(EGLClientBuffer clientBuffer)
{
return reinterpret_cast<ANativeWindowBuffer *>(clientBuffer);
}
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)
{
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;
default:
return GL_NONE;
}
}
AHardwareBuffer *ANativeWindowBufferToAHardwareBuffer(ANativeWindowBuffer *windowBuffer)
{
return offsetPointer<AHardwareBuffer>(windowBuffer,
-kAHardwareBufferToANativeWindowBufferOffset);
}
EGLClientBuffer AHardwareBufferToClientBuffer(const AHardwareBuffer *hardwareBuffer)
{
return offsetPointer<EGLClientBuffer>(hardwareBuffer,
kAHardwareBufferToANativeWindowBufferOffset);
}
} // namespace android
} // namespace angle
|
