GraphicBuffer.cpp revision 3330b203039dea366d4981db1408a460134b2d2c 
1/*
2 * Copyright (C) 2007 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#include <stdlib.h>
18#include <stdint.h>
19#include <sys/types.h>
20
21#include <binder/Parcel.h>
22
23#include <utils/Errors.h>
24#include <utils/Log.h>
25
26#include <ui/GraphicBuffer.h>
27#include <ui/GraphicBufferAllocator.h>
28#include <ui/GraphicBufferMapper.h>
29#include <ui/PixelFormat.h>
30
31#include <pixelflinger/pixelflinger.h>
32
33namespace android {
34
35// ===========================================================================
36// Buffer and implementation of android_native_buffer_t
37// ===========================================================================
38
39GraphicBuffer::GraphicBuffer()
40    : BASE(), mOwner(false), mBufferMapper(GraphicBufferMapper::get()),
41      mInitCheck(NO_ERROR),  mVStride(0), mIndex(-1)
42{
43    width  =
44    height =
45    stride =
46    format =
47    usage  = 0;
48    handle = NULL;
49}
50
51GraphicBuffer::GraphicBuffer(uint32_t w, uint32_t h,
52        PixelFormat reqFormat, uint32_t reqUsage)
53    : BASE(), mOwner(false), mBufferMapper(GraphicBufferMapper::get()),
54      mInitCheck(NO_ERROR),  mVStride(0), mIndex(-1)
55{
56    width  =
57    height =
58    stride =
59    format =
60    usage  = 0;
61    handle = NULL;
62    mInitCheck = initSize(w, h, reqFormat, reqUsage);
63}
64
65GraphicBuffer::GraphicBuffer(const Parcel& data)
66    : BASE(), mOwner(true), mBufferMapper(GraphicBufferMapper::get()),
67      mInitCheck(NO_ERROR),  mVStride(0), mIndex(-1)
68{
69    // we own the handle in this case
70    width  = data.readInt32();
71    if (width < 0) {
72        width = height = stride = format = usage = 0;
73        handle = 0;
74    } else {
75        height = data.readInt32();
76        stride = data.readInt32();
77        format = data.readInt32();
78        usage  = data.readInt32();
79        handle = data.readNativeHandle();
80    }
81}
82
83GraphicBuffer::~GraphicBuffer()
84{
85    if (handle) {
86        if (mOwner) {
87            native_handle_close(handle);
88            native_handle_delete(const_cast<native_handle*>(handle));
89        } else {
90            GraphicBufferAllocator& allocator(GraphicBufferAllocator::get());
91            allocator.free(handle);
92        }
93    }
94}
95
96status_t GraphicBuffer::initCheck() const {
97    return mInitCheck;
98}
99
100android_native_buffer_t* GraphicBuffer::getNativeBuffer() const
101{
102    return static_cast<android_native_buffer_t*>(
103            const_cast<GraphicBuffer*>(this));
104}
105
106status_t GraphicBuffer::reallocate(uint32_t w, uint32_t h, PixelFormat f,
107        uint32_t reqUsage)
108{
109    if (handle) {
110        GraphicBufferAllocator& allocator(GraphicBufferAllocator::get());
111        allocator.free(handle);
112        handle = 0;
113    }
114    return initSize(w, h, f, reqUsage);
115}
116
117status_t GraphicBuffer::initSize(uint32_t w, uint32_t h, PixelFormat format,
118        uint32_t reqUsage)
119{
120    if (format == PIXEL_FORMAT_RGBX_8888)
121        format = PIXEL_FORMAT_RGBA_8888;
122
123    GraphicBufferAllocator& allocator = GraphicBufferAllocator::get();
124    status_t err = allocator.alloc(w, h, format, reqUsage, &handle, &stride);
125    if (err == NO_ERROR) {
126        this->width  = w;
127        this->height = h;
128        this->format = format;
129        this->usage  = reqUsage;
130        mVStride = 0;
131    }
132    return err;
133}
134
135status_t GraphicBuffer::lock(uint32_t usage, void** vaddr)
136{
137    const Rect lockBounds(width, height);
138    status_t res = lock(usage, lockBounds, vaddr);
139    return res;
140}
141
142status_t GraphicBuffer::lock(uint32_t usage, const Rect& rect, void** vaddr)
143{
144    if (rect.left < 0 || rect.right  > this->width ||
145        rect.top  < 0 || rect.bottom > this->height) {
146        LOGE("locking pixels (%d,%d,%d,%d) outside of buffer (w=%d, h=%d)",
147                rect.left, rect.top, rect.right, rect.bottom,
148                this->width, this->height);
149        return BAD_VALUE;
150    }
151    status_t res = getBufferMapper().lock(handle, usage, rect, vaddr);
152    return res;
153}
154
155status_t GraphicBuffer::unlock()
156{
157    status_t res = getBufferMapper().unlock(handle);
158    return res;
159}
160
161status_t GraphicBuffer::lock(GGLSurface* sur, uint32_t usage)
162{
163    void* vaddr;
164    status_t res = GraphicBuffer::lock(usage, &vaddr);
165    if (res == NO_ERROR && sur) {
166        sur->version = sizeof(GGLSurface);
167        sur->width = width;
168        sur->height = height;
169        sur->stride = stride;
170        sur->format = format;
171        sur->vstride = mVStride;
172        sur->data = static_cast<GGLubyte*>(vaddr);
173    }
174    return res;
175}
176
177
178status_t GraphicBuffer::writeToParcel(Parcel* reply,
179        android_native_buffer_t const* buffer)
180{
181    if (buffer == NULL)
182        return BAD_VALUE;
183
184    if (buffer->width < 0 || buffer->height < 0)
185        return BAD_VALUE;
186
187    status_t err = NO_ERROR;
188    if (buffer->handle == NULL) {
189        // this buffer doesn't have a handle
190        reply->writeInt32(NO_MEMORY);
191    } else {
192        reply->writeInt32(buffer->width);
193        reply->writeInt32(buffer->height);
194        reply->writeInt32(buffer->stride);
195        reply->writeInt32(buffer->format);
196        reply->writeInt32(buffer->usage);
197        err = reply->writeNativeHandle(buffer->handle);
198    }
199    return err;
200}
201
202
203void GraphicBuffer::setIndex(int index) {
204    mIndex = index;
205}
206
207int GraphicBuffer::getIndex() const {
208    return mIndex;
209}
210
211// ---------------------------------------------------------------------------
212
213}; // namespace android
214