GraphicBuffer.cpp revision b5a00fcb71426492f248ed49a0514a9b8d385065 
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
117void GraphicBuffer::dumpAllocationsToSystemLog()
118{
119    GraphicBufferAllocator::dumpToSystemLog();
120}
121
122android_native_buffer_t* GraphicBuffer::getNativeBuffer() const
123{
124    return static_cast<android_native_buffer_t*>(
125            const_cast<GraphicBuffer*>(this));
126}
127
128status_t GraphicBuffer::reallocate(uint32_t w, uint32_t h, PixelFormat f,
129        uint32_t reqUsage)
130{
131    if (mOwner != ownData)
132        return INVALID_OPERATION;
133
134    if (handle && w==width && h==height && f==format && reqUsage==usage)
135        return NO_ERROR;
136
137    if (handle) {
138        GraphicBufferAllocator& allocator(GraphicBufferAllocator::get());
139        allocator.free(handle);
140        handle = 0;
141    }
142    return initSize(w, h, f, reqUsage);
143}
144
145status_t GraphicBuffer::initSize(uint32_t w, uint32_t h, PixelFormat format,
146        uint32_t reqUsage)
147{
148    GraphicBufferAllocator& allocator = GraphicBufferAllocator::get();
149    status_t err = allocator.alloc(w, h, format, reqUsage, &handle, &stride);
150    if (err == NO_ERROR) {
151        this->width  = w;
152        this->height = h;
153        this->format = format;
154        this->usage  = reqUsage;
155    }
156    return err;
157}
158
159status_t GraphicBuffer::lock(uint32_t usage, void** vaddr)
160{
161    const Rect lockBounds(width, height);
162    status_t res = lock(usage, lockBounds, vaddr);
163    return res;
164}
165
166status_t GraphicBuffer::lock(uint32_t usage, const Rect& rect, void** vaddr)
167{
168    if (rect.left < 0 || rect.right  > this->width ||
169        rect.top  < 0 || rect.bottom > this->height) {
170        LOGE("locking pixels (%d,%d,%d,%d) outside of buffer (w=%d, h=%d)",
171                rect.left, rect.top, rect.right, rect.bottom,
172                this->width, this->height);
173        return BAD_VALUE;
174    }
175    status_t res = getBufferMapper().lock(handle, usage, rect, vaddr);
176    return res;
177}
178
179status_t GraphicBuffer::unlock()
180{
181    status_t res = getBufferMapper().unlock(handle);
182    return res;
183}
184
185status_t GraphicBuffer::lock(GGLSurface* sur, uint32_t usage)
186{
187    void* vaddr;
188    status_t res = GraphicBuffer::lock(usage, &vaddr);
189    if (res == NO_ERROR && sur) {
190        sur->version = sizeof(GGLSurface);
191        sur->width = width;
192        sur->height = height;
193        sur->stride = stride;
194        sur->format = format;
195        sur->data = static_cast<GGLubyte*>(vaddr);
196    }
197    return res;
198}
199
200size_t GraphicBuffer::getFlattenedSize() const {
201    return (8 + (handle ? handle->numInts : 0))*sizeof(int);
202}
203
204size_t GraphicBuffer::getFdCount() const {
205    return handle ? handle->numFds : 0;
206}
207
208status_t GraphicBuffer::flatten(void* buffer, size_t size,
209        int fds[], size_t count) const
210{
211    size_t sizeNeeded = GraphicBuffer::getFlattenedSize();
212    if (size < sizeNeeded) return NO_MEMORY;
213
214    size_t fdCountNeeded = GraphicBuffer::getFdCount();
215    if (count < fdCountNeeded) return NO_MEMORY;
216
217    int* buf = static_cast<int*>(buffer);
218    buf[0] = 'GBFR';
219    buf[1] = width;
220    buf[2] = height;
221    buf[3] = stride;
222    buf[4] = format;
223    buf[5] = usage;
224    buf[6] = 0;
225    buf[7] = 0;
226
227    if (handle) {
228        buf[6] = handle->numFds;
229        buf[7] = handle->numInts;
230        native_handle_t const* const h = handle;
231        memcpy(fds,     h->data,             h->numFds*sizeof(int));
232        memcpy(&buf[8], h->data + h->numFds, h->numInts*sizeof(int));
233    }
234
235    return NO_ERROR;
236}
237
238status_t GraphicBuffer::unflatten(void const* buffer, size_t size,
239        int fds[], size_t count)
240{
241    if (size < 8*sizeof(int)) return NO_MEMORY;
242
243    int const* buf = static_cast<int const*>(buffer);
244    if (buf[0] != 'GBFR') return BAD_TYPE;
245
246    const size_t numFds  = buf[6];
247    const size_t numInts = buf[7];
248
249    const size_t sizeNeeded = (8 + numInts) * sizeof(int);
250    if (size < sizeNeeded) return NO_MEMORY;
251
252    size_t fdCountNeeded = 0;
253    if (count < fdCountNeeded) return NO_MEMORY;
254
255    if (handle) {
256        // free previous handle if any
257        free_handle();
258    }
259
260    if (numFds || numInts) {
261        width  = buf[1];
262        height = buf[2];
263        stride = buf[3];
264        format = buf[4];
265        usage  = buf[5];
266        native_handle* h = native_handle_create(numFds, numInts);
267        memcpy(h->data,          fds,     numFds*sizeof(int));
268        memcpy(h->data + numFds, &buf[8], numInts*sizeof(int));
269        handle = h;
270    } else {
271        width = height = stride = format = usage = 0;
272        handle = NULL;
273    }
274
275    mOwner = ownHandle;
276
277    if (handle != 0) {
278        mBufferMapper.registerBuffer(handle);
279    }
280
281    return NO_ERROR;
282}
283
284
285void GraphicBuffer::setIndex(int index) {
286    mIndex = index;
287}
288
289int GraphicBuffer::getIndex() const {
290    return mIndex;
291}
292
293// ---------------------------------------------------------------------------
294
295}; // namespace android
296