GraphicBuffer.cpp revision 30eb1b1803b590cf08cbf425dbdda4d330044f77 
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    transform = 0;
49    handle = NULL;
50}
51
52GraphicBuffer::GraphicBuffer(uint32_t w, uint32_t h,
53        PixelFormat reqFormat, uint32_t reqUsage)
54    : BASE(), mOwner(ownData), mBufferMapper(GraphicBufferMapper::get()),
55      mInitCheck(NO_ERROR), mIndex(-1)
56{
57    width  =
58    height =
59    stride =
60    format =
61    usage  =
62    transform = 0;
63    handle = NULL;
64    mInitCheck = initSize(w, h, reqFormat, reqUsage);
65}
66
67GraphicBuffer::GraphicBuffer(uint32_t w, uint32_t h,
68        PixelFormat inFormat, uint32_t inUsage,
69        uint32_t inStride, native_handle_t* inHandle, bool keepOwnership)
70    : BASE(), mOwner(keepOwnership ? ownHandle : ownNone),
71      mBufferMapper(GraphicBufferMapper::get()),
72      mInitCheck(NO_ERROR), mIndex(-1)
73{
74    width  = w;
75    height = h;
76    stride = inStride;
77    format = inFormat;
78    usage  = inUsage;
79    transform = 0;
80    handle = inHandle;
81}
82
83GraphicBuffer::~GraphicBuffer()
84{
85    if (handle) {
86        free_handle();
87    }
88}
89
90void GraphicBuffer::free_handle()
91{
92    if (mOwner == ownHandle) {
93        native_handle_close(handle);
94        native_handle_delete(const_cast<native_handle*>(handle));
95    } else if (mOwner == ownData) {
96        GraphicBufferAllocator& allocator(GraphicBufferAllocator::get());
97        allocator.free(handle);
98    }
99}
100
101status_t GraphicBuffer::initCheck() const {
102    return mInitCheck;
103}
104
105void GraphicBuffer::dumpAllocationsToSystemLog()
106{
107    GraphicBufferAllocator::dumpToSystemLog();
108}
109
110android_native_buffer_t* GraphicBuffer::getNativeBuffer() const
111{
112    return static_cast<android_native_buffer_t*>(
113            const_cast<GraphicBuffer*>(this));
114}
115
116status_t GraphicBuffer::reallocate(uint32_t w, uint32_t h, PixelFormat f,
117        uint32_t reqUsage)
118{
119    if (mOwner != ownData)
120        return INVALID_OPERATION;
121
122    if (handle && w==width && h==height && f==format && reqUsage==usage)
123        return NO_ERROR;
124
125    if (handle) {
126        GraphicBufferAllocator& allocator(GraphicBufferAllocator::get());
127        allocator.free(handle);
128        handle = 0;
129    }
130    return initSize(w, h, f, reqUsage);
131}
132
133status_t GraphicBuffer::initSize(uint32_t w, uint32_t h, PixelFormat format,
134        uint32_t reqUsage)
135{
136    GraphicBufferAllocator& allocator = GraphicBufferAllocator::get();
137    status_t err = allocator.alloc(w, h, format, reqUsage, &handle, &stride);
138    if (err == NO_ERROR) {
139        this->width  = w;
140        this->height = h;
141        this->format = format;
142        this->usage  = reqUsage;
143    }
144    return err;
145}
146
147status_t GraphicBuffer::lock(uint32_t usage, void** vaddr)
148{
149    const Rect lockBounds(width, height);
150    status_t res = lock(usage, lockBounds, vaddr);
151    return res;
152}
153
154status_t GraphicBuffer::lock(uint32_t usage, const Rect& rect, void** vaddr)
155{
156    if (rect.left < 0 || rect.right  > this->width ||
157        rect.top  < 0 || rect.bottom > this->height) {
158        LOGE("locking pixels (%d,%d,%d,%d) outside of buffer (w=%d, h=%d)",
159                rect.left, rect.top, rect.right, rect.bottom,
160                this->width, this->height);
161        return BAD_VALUE;
162    }
163    status_t res = getBufferMapper().lock(handle, usage, rect, vaddr);
164    return res;
165}
166
167status_t GraphicBuffer::unlock()
168{
169    status_t res = getBufferMapper().unlock(handle);
170    return res;
171}
172
173status_t GraphicBuffer::lock(GGLSurface* sur, uint32_t usage)
174{
175    void* vaddr;
176    status_t res = GraphicBuffer::lock(usage, &vaddr);
177    if (res == NO_ERROR && sur) {
178        sur->version = sizeof(GGLSurface);
179        sur->width = width;
180        sur->height = height;
181        sur->stride = stride;
182        sur->format = format;
183        sur->data = static_cast<GGLubyte*>(vaddr);
184    }
185    return res;
186}
187
188const int kFlattenFdsOffset = 9;
189
190size_t GraphicBuffer::getFlattenedSize() const {
191    return (kFlattenFdsOffset + (handle ? handle->numInts : 0))*sizeof(int);
192}
193
194size_t GraphicBuffer::getFdCount() const {
195    return handle ? handle->numFds : 0;
196}
197
198status_t GraphicBuffer::flatten(void* buffer, size_t size,
199        int fds[], size_t count) const
200{
201    size_t sizeNeeded = GraphicBuffer::getFlattenedSize();
202    if (size < sizeNeeded) return NO_MEMORY;
203
204    size_t fdCountNeeded = GraphicBuffer::getFdCount();
205    if (count < fdCountNeeded) return NO_MEMORY;
206
207    int* buf = static_cast<int*>(buffer);
208    buf[0] = 'GBFR';
209    buf[1] = width;
210    buf[2] = height;
211    buf[3] = stride;
212    buf[4] = format;
213    buf[5] = usage;
214    buf[6] = 0;
215    buf[7] = 0;
216    buf[8] = transform;
217
218    if (handle) {
219        buf[6] = handle->numFds;
220        buf[7] = handle->numInts;
221        native_handle_t const* const h = handle;
222        memcpy(fds,     h->data,             h->numFds*sizeof(int));
223        memcpy(&buf[kFlattenFdsOffset], h->data + h->numFds, h->numInts*sizeof(int));
224    }
225
226    return NO_ERROR;
227}
228
229status_t GraphicBuffer::unflatten(void const* buffer, size_t size,
230        int fds[], size_t count)
231{
232    if (size < kFlattenFdsOffset*sizeof(int)) return NO_MEMORY;
233
234    int const* buf = static_cast<int const*>(buffer);
235    if (buf[0] != 'GBFR') return BAD_TYPE;
236
237    const size_t numFds  = buf[6];
238    const size_t numInts = buf[7];
239
240    const size_t sizeNeeded = (kFlattenFdsOffset + numInts) * sizeof(int);
241    if (size < sizeNeeded) return NO_MEMORY;
242
243    size_t fdCountNeeded = 0;
244    if (count < fdCountNeeded) return NO_MEMORY;
245
246    if (handle) {
247        // free previous handle if any
248        free_handle();
249    }
250
251    if (numFds || numInts) {
252        width  = buf[1];
253        height = buf[2];
254        stride = buf[3];
255        format = buf[4];
256        usage  = buf[5];
257        transform = buf[8];
258        native_handle* h = native_handle_create(numFds, numInts);
259        memcpy(h->data,          fds,     numFds*sizeof(int));
260        memcpy(h->data + numFds, &buf[kFlattenFdsOffset], numInts*sizeof(int));
261        handle = h;
262    } else {
263        width = height = stride = format = usage = 0;
264        handle = NULL;
265    }
266
267    mOwner = ownHandle;
268    return NO_ERROR;
269}
270
271
272void GraphicBuffer::setIndex(int index) {
273    mIndex = index;
274}
275
276int GraphicBuffer::getIndex() const {
277    return mIndex;
278}
279
280// ---------------------------------------------------------------------------
281
282}; // namespace android
283