GraphicBuffer.cpp revision 6fee064809068fe1a7da63d55678d9a222b0be15 
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(ownData), 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(ownData), 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(uint32_t w, uint32_t h,
66        PixelFormat inFormat, uint32_t inUsage,
67        uint32_t inStride, native_handle_t* inHandle, bool keepOwnership)
68    : BASE(), mOwner(keepOwnership ? ownHandle : ownNone),
69      mBufferMapper(GraphicBufferMapper::get()),
70      mInitCheck(NO_ERROR),  mVStride(0), mIndex(-1)
71{
72    width  = w;
73    height = h;
74    stride = inStride;
75    format = inFormat;
76    usage  = inUsage;
77    handle = inHandle;
78}
79
80GraphicBuffer::GraphicBuffer(const Parcel& data)
81    : BASE(), mOwner(ownHandle), mBufferMapper(GraphicBufferMapper::get()),
82      mInitCheck(NO_ERROR),  mVStride(0), mIndex(-1)
83{
84    // we own the handle in this case
85    width  = data.readInt32();
86    if (width < 0) {
87        width = height = stride = format = usage = 0;
88        handle = 0;
89    } else {
90        height = data.readInt32();
91        stride = data.readInt32();
92        format = data.readInt32();
93        usage  = data.readInt32();
94        handle = data.readNativeHandle();
95    }
96}
97
98GraphicBuffer::~GraphicBuffer()
99{
100    if (handle) {
101        if (mOwner == ownHandle) {
102            native_handle_close(handle);
103            native_handle_delete(const_cast<native_handle*>(handle));
104        } else if (mOwner == ownData) {
105            GraphicBufferAllocator& allocator(GraphicBufferAllocator::get());
106            allocator.free(handle);
107        }
108    }
109}
110
111status_t GraphicBuffer::initCheck() const {
112    return mInitCheck;
113}
114
115android_native_buffer_t* GraphicBuffer::getNativeBuffer() const
116{
117    return static_cast<android_native_buffer_t*>(
118            const_cast<GraphicBuffer*>(this));
119}
120
121status_t GraphicBuffer::reallocate(uint32_t w, uint32_t h, PixelFormat f,
122        uint32_t reqUsage)
123{
124    if (mOwner != ownData)
125        return INVALID_OPERATION;
126
127    if (handle) {
128        GraphicBufferAllocator& allocator(GraphicBufferAllocator::get());
129        allocator.free(handle);
130        handle = 0;
131    }
132    return initSize(w, h, f, reqUsage);
133}
134
135status_t GraphicBuffer::initSize(uint32_t w, uint32_t h, PixelFormat format,
136        uint32_t reqUsage)
137{
138    if (format == PIXEL_FORMAT_RGBX_8888)
139        format = PIXEL_FORMAT_RGBA_8888;
140
141    GraphicBufferAllocator& allocator = GraphicBufferAllocator::get();
142    status_t err = allocator.alloc(w, h, format, reqUsage, &handle, &stride);
143    if (err == NO_ERROR) {
144        this->width  = w;
145        this->height = h;
146        this->format = format;
147        this->usage  = reqUsage;
148        mVStride = 0;
149    }
150    return err;
151}
152
153status_t GraphicBuffer::lock(uint32_t usage, void** vaddr)
154{
155    const Rect lockBounds(width, height);
156    status_t res = lock(usage, lockBounds, vaddr);
157    return res;
158}
159
160status_t GraphicBuffer::lock(uint32_t usage, const Rect& rect, void** vaddr)
161{
162    if (rect.left < 0 || rect.right  > this->width ||
163        rect.top  < 0 || rect.bottom > this->height) {
164        LOGE("locking pixels (%d,%d,%d,%d) outside of buffer (w=%d, h=%d)",
165                rect.left, rect.top, rect.right, rect.bottom,
166                this->width, this->height);
167        return BAD_VALUE;
168    }
169    status_t res = getBufferMapper().lock(handle, usage, rect, vaddr);
170    return res;
171}
172
173status_t GraphicBuffer::unlock()
174{
175    status_t res = getBufferMapper().unlock(handle);
176    return res;
177}
178
179status_t GraphicBuffer::lock(GGLSurface* sur, uint32_t usage)
180{
181    void* vaddr;
182    status_t res = GraphicBuffer::lock(usage, &vaddr);
183    if (res == NO_ERROR && sur) {
184        sur->version = sizeof(GGLSurface);
185        sur->width = width;
186        sur->height = height;
187        sur->stride = stride;
188        sur->format = format;
189        sur->vstride = mVStride;
190        sur->data = static_cast<GGLubyte*>(vaddr);
191    }
192    return res;
193}
194
195
196status_t GraphicBuffer::writeToParcel(Parcel* reply,
197        android_native_buffer_t const* buffer)
198{
199    if (buffer == NULL)
200        return BAD_VALUE;
201
202    if (buffer->width < 0 || buffer->height < 0)
203        return BAD_VALUE;
204
205    status_t err = NO_ERROR;
206    if (buffer->handle == NULL) {
207        // this buffer doesn't have a handle
208        reply->writeInt32(NO_MEMORY);
209    } else {
210        reply->writeInt32(buffer->width);
211        reply->writeInt32(buffer->height);
212        reply->writeInt32(buffer->stride);
213        reply->writeInt32(buffer->format);
214        reply->writeInt32(buffer->usage);
215        err = reply->writeNativeHandle(buffer->handle);
216    }
217    return err;
218}
219
220
221void GraphicBuffer::setIndex(int index) {
222    mIndex = index;
223}
224
225int GraphicBuffer::getIndex() const {
226    return mIndex;
227}
228
229void GraphicBuffer::setVerticalStride(uint32_t vstride) {
230    mVStride = vstride;
231}
232
233uint32_t GraphicBuffer::getVerticalStride() const {
234    return mVStride;
235}
236
237// ---------------------------------------------------------------------------
238
239}; // namespace android
240