1 /*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define LOG_TAG "OpenGLRenderer"
18
19 #include <utils/Log.h>
20
21 #include "Caches.h"
22 #include "Debug.h"
23 #include "Extensions.h"
24 #include "PixelBuffer.h"
25 #include "Properties.h"
26
27 namespace android {
28 namespace uirenderer {
29
30 ///////////////////////////////////////////////////////////////////////////////
31 // CPU pixel buffer
32 ///////////////////////////////////////////////////////////////////////////////
33
34 class CpuPixelBuffer: public PixelBuffer {
35 public:
36 CpuPixelBuffer(GLenum format, uint32_t width, uint32_t height);
37 ~CpuPixelBuffer();
38
39 uint8_t* map(AccessMode mode = kAccessMode_ReadWrite);
40 void unmap();
41
42 uint8_t* getMappedPointer() const;
43
44 void upload(uint32_t x, uint32_t y, uint32_t width, uint32_t height, int offset);
45
46 private:
47 uint8_t* mBuffer;
48 };
49
CpuPixelBuffer(GLenum format,uint32_t width,uint32_t height)50 CpuPixelBuffer::CpuPixelBuffer(GLenum format, uint32_t width, uint32_t height):
51 PixelBuffer(format, width, height) {
52 mBuffer = new uint8_t[width * height * formatSize(format)];
53 }
54
~CpuPixelBuffer()55 CpuPixelBuffer::~CpuPixelBuffer() {
56 delete[] mBuffer;
57 }
58
map(AccessMode mode)59 uint8_t* CpuPixelBuffer::map(AccessMode mode) {
60 if (mAccessMode == kAccessMode_None) {
61 mAccessMode = mode;
62 }
63 return mBuffer;
64 }
65
unmap()66 void CpuPixelBuffer::unmap() {
67 mAccessMode = kAccessMode_None;
68 }
69
getMappedPointer() const70 uint8_t* CpuPixelBuffer::getMappedPointer() const {
71 return mAccessMode == kAccessMode_None ? NULL : mBuffer;
72 }
73
upload(uint32_t x,uint32_t y,uint32_t width,uint32_t height,int offset)74 void CpuPixelBuffer::upload(uint32_t x, uint32_t y, uint32_t width, uint32_t height, int offset) {
75 glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height,
76 mFormat, GL_UNSIGNED_BYTE, mBuffer + offset);
77 }
78
79 ///////////////////////////////////////////////////////////////////////////////
80 // GPU pixel buffer
81 ///////////////////////////////////////////////////////////////////////////////
82
83 class GpuPixelBuffer: public PixelBuffer {
84 public:
85 GpuPixelBuffer(GLenum format, uint32_t width, uint32_t height);
86 ~GpuPixelBuffer();
87
88 uint8_t* map(AccessMode mode = kAccessMode_ReadWrite);
89 void unmap();
90
91 uint8_t* getMappedPointer() const;
92
93 void upload(uint32_t x, uint32_t y, uint32_t width, uint32_t height, int offset);
94
95 private:
96 GLuint mBuffer;
97 uint8_t* mMappedPointer;
98 Caches& mCaches;
99 };
100
GpuPixelBuffer(GLenum format,uint32_t width,uint32_t height)101 GpuPixelBuffer::GpuPixelBuffer(GLenum format, uint32_t width, uint32_t height):
102 PixelBuffer(format, width, height), mMappedPointer(0), mCaches(Caches::getInstance()) {
103 glGenBuffers(1, &mBuffer);
104 mCaches.bindPixelBuffer(mBuffer);
105 glBufferData(GL_PIXEL_UNPACK_BUFFER, getSize(), NULL, GL_DYNAMIC_DRAW);
106 mCaches.unbindPixelBuffer();
107 }
108
~GpuPixelBuffer()109 GpuPixelBuffer::~GpuPixelBuffer() {
110 glDeleteBuffers(1, &mBuffer);
111 }
112
map(AccessMode mode)113 uint8_t* GpuPixelBuffer::map(AccessMode mode) {
114 if (mAccessMode == kAccessMode_None) {
115 mCaches.bindPixelBuffer(mBuffer);
116 mMappedPointer = (uint8_t*) glMapBufferRange(GL_PIXEL_UNPACK_BUFFER, 0, getSize(), mode);
117 #if DEBUG_OPENGL
118 if (!mMappedPointer) {
119 GLenum status = GL_NO_ERROR;
120 while ((status = glGetError()) != GL_NO_ERROR) {
121 ALOGE("Could not map GPU pixel buffer: 0x%x", status);
122 }
123 }
124 #endif
125 mAccessMode = mode;
126 }
127
128 return mMappedPointer;
129 }
130
unmap()131 void GpuPixelBuffer::unmap() {
132 if (mAccessMode != kAccessMode_None) {
133 if (mMappedPointer) {
134 mCaches.bindPixelBuffer(mBuffer);
135 GLboolean status = glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER);
136 if (status == GL_FALSE) {
137 ALOGE("Corrupted GPU pixel buffer");
138 }
139 }
140 mAccessMode = kAccessMode_None;
141 mMappedPointer = NULL;
142 }
143 }
144
getMappedPointer() const145 uint8_t* GpuPixelBuffer::getMappedPointer() const {
146 return mMappedPointer;
147 }
148
upload(uint32_t x,uint32_t y,uint32_t width,uint32_t height,int offset)149 void GpuPixelBuffer::upload(uint32_t x, uint32_t y, uint32_t width, uint32_t height, int offset) {
150 // If the buffer is not mapped, unmap() will not bind it
151 mCaches.bindPixelBuffer(mBuffer);
152 unmap();
153 glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height, mFormat,
154 GL_UNSIGNED_BYTE, (void*) offset);
155 }
156
157 ///////////////////////////////////////////////////////////////////////////////
158 // Factory
159 ///////////////////////////////////////////////////////////////////////////////
160
create(GLenum format,uint32_t width,uint32_t height,BufferType type)161 PixelBuffer* PixelBuffer::create(GLenum format, uint32_t width, uint32_t height, BufferType type) {
162 if (type == kBufferType_Auto && Caches::getInstance().gpuPixelBuffersEnabled) {
163 return new GpuPixelBuffer(format, width, height);
164 }
165 return new CpuPixelBuffer(format, width, height);
166 }
167
168 }; // namespace uirenderer
169 }; // namespace android
170