GraphicBuffer.cpp revision 309d3bb2f902163356f9d40b6d45c11b435d77a9 
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#define LOG_TAG "GraphicBuffer"
18
19#include <stdlib.h>
20#include <stdint.h>
21#include <sys/types.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), 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), 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), 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(android_native_buffer_t* buffer, bool keepOwnership)
81    : BASE(), mOwner(keepOwnership ? ownHandle : ownNone),
82      mBufferMapper(GraphicBufferMapper::get()),
83      mInitCheck(NO_ERROR), mIndex(-1), mWrappedBuffer(buffer)
84{
85    width  = buffer->width;
86    height = buffer->height;
87    stride = buffer->stride;
88    format = buffer->format;
89    usage  = buffer->usage;
90    handle = buffer->handle;
91}
92
93GraphicBuffer::~GraphicBuffer()
94{
95    if (handle) {
96        free_handle();
97    }
98}
99
100void GraphicBuffer::free_handle()
101{
102    if (mOwner == ownHandle) {
103        mBufferMapper.unregisterBuffer(handle);
104        native_handle_close(handle);
105        native_handle_delete(const_cast<native_handle*>(handle));
106    } else if (mOwner == ownData) {
107        GraphicBufferAllocator& allocator(GraphicBufferAllocator::get());
108        allocator.free(handle);
109    }
110    mWrappedBuffer = 0;
111}
112
113status_t GraphicBuffer::initCheck() const {
114    return mInitCheck;
115}
116
117android_native_buffer_t* GraphicBuffer::getNativeBuffer() const
118{
119    return static_cast<android_native_buffer_t*>(
120            const_cast<GraphicBuffer*>(this));
121}
122
123status_t GraphicBuffer::reallocate(uint32_t w, uint32_t h, PixelFormat f,
124        uint32_t reqUsage)
125{
126    if (mOwner != ownData)
127        return INVALID_OPERATION;
128
129    if (handle && w==width && h==height && f==format && reqUsage==usage)
130        return NO_ERROR;
131
132    if (handle) {
133        GraphicBufferAllocator& allocator(GraphicBufferAllocator::get());
134        allocator.free(handle);
135        handle = 0;
136    }
137    return initSize(w, h, f, reqUsage);
138}
139
140status_t GraphicBuffer::initSize(uint32_t w, uint32_t h, PixelFormat format,
141        uint32_t reqUsage)
142{
143    GraphicBufferAllocator& allocator = GraphicBufferAllocator::get();
144    status_t err = allocator.alloc(w, h, format, reqUsage, &handle, &stride);
145    if (err == NO_ERROR) {
146        this->width  = w;
147        this->height = h;
148        this->format = format;
149        this->usage  = reqUsage;
150    }
151    return err;
152}
153
154status_t GraphicBuffer::lock(uint32_t usage, void** vaddr)
155{
156    const Rect lockBounds(width, height);
157    status_t res = lock(usage, lockBounds, vaddr);
158    return res;
159}
160
161status_t GraphicBuffer::lock(uint32_t usage, const Rect& rect, void** vaddr)
162{
163    if (rect.left < 0 || rect.right  > this->width ||
164        rect.top  < 0 || rect.bottom > this->height) {
165        LOGE("locking pixels (%d,%d,%d,%d) outside of buffer (w=%d, h=%d)",
166                rect.left, rect.top, rect.right, rect.bottom,
167                this->width, this->height);
168        return BAD_VALUE;
169    }
170    status_t res = getBufferMapper().lock(handle, usage, rect, vaddr);
171    return res;
172}
173
174status_t GraphicBuffer::unlock()
175{
176    status_t res = getBufferMapper().unlock(handle);
177    return res;
178}
179
180status_t GraphicBuffer::lock(GGLSurface* sur, uint32_t usage)
181{
182    void* vaddr;
183    status_t res = GraphicBuffer::lock(usage, &vaddr);
184    if (res == NO_ERROR && sur) {
185        sur->version = sizeof(GGLSurface);
186        sur->width = width;
187        sur->height = height;
188        sur->stride = stride;
189        sur->format = format;
190        sur->data = static_cast<GGLubyte*>(vaddr);
191    }
192    return res;
193}
194
195size_t GraphicBuffer::getFlattenedSize() const {
196    return (8 + (handle ? handle->numInts : 0))*sizeof(int);
197}
198
199size_t GraphicBuffer::getFdCount() const {
200    return handle ? handle->numFds : 0;
201}
202
203status_t GraphicBuffer::flatten(void* buffer, size_t size,
204        int fds[], size_t count) const
205{
206    size_t sizeNeeded = GraphicBuffer::getFlattenedSize();
207    if (size < sizeNeeded) return NO_MEMORY;
208
209    size_t fdCountNeeded = GraphicBuffer::getFdCount();
210    if (count < fdCountNeeded) return NO_MEMORY;
211
212    int* buf = static_cast<int*>(buffer);
213    buf[0] = 'GBFR';
214    buf[1] = width;
215    buf[2] = height;
216    buf[3] = stride;
217    buf[4] = format;
218    buf[5] = usage;
219    buf[6] = 0;
220    buf[7] = 0;
221
222    if (handle) {
223        buf[6] = handle->numFds;
224        buf[7] = handle->numInts;
225        native_handle_t const* const h = handle;
226        memcpy(fds,     h->data,             h->numFds*sizeof(int));
227        memcpy(&buf[8], h->data + h->numFds, h->numInts*sizeof(int));
228    }
229
230    return NO_ERROR;
231}
232
233status_t GraphicBuffer::unflatten(void const* buffer, size_t size,
234        int fds[], size_t count)
235{
236    if (size < 8*sizeof(int)) return NO_MEMORY;
237
238    int const* buf = static_cast<int const*>(buffer);
239    if (buf[0] != 'GBFR') return BAD_TYPE;
240
241    const size_t numFds  = buf[6];
242    const size_t numInts = buf[7];
243
244    const size_t sizeNeeded = (8 + numInts) * sizeof(int);
245    if (size < sizeNeeded) return NO_MEMORY;
246
247    size_t fdCountNeeded = 0;
248    if (count < fdCountNeeded) return NO_MEMORY;
249
250    if (handle) {
251        // free previous handle if any
252        free_handle();
253    }
254
255    if (numFds || numInts) {
256        width  = buf[1];
257        height = buf[2];
258        stride = buf[3];
259        format = buf[4];
260        usage  = buf[5];
261        native_handle* h = native_handle_create(numFds, numInts);
262        memcpy(h->data,          fds,     numFds*sizeof(int));
263        memcpy(h->data + numFds, &buf[8], numInts*sizeof(int));
264        handle = h;
265    } else {
266        width = height = stride = format = usage = 0;
267        handle = NULL;
268    }
269
270    mOwner = ownHandle;
271
272    if (handle != 0) {
273        mBufferMapper.registerBuffer(handle);
274    }
275
276    return NO_ERROR;
277}
278
279
280void GraphicBuffer::setIndex(int index) {
281    mIndex = index;
282}
283
284int GraphicBuffer::getIndex() const {
285    return mIndex;
286}
287
288// ---------------------------------------------------------------------------
289
290}; // namespace android
291