GraphicBuffer.cpp revision b7e930db175c192464cebdeb49eb56cf6dd60114 
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()
81{
82    if (handle) {
83        free_handle();
84    }
85}
86
87void GraphicBuffer::free_handle()
88{
89    if (mOwner == ownHandle) {
90        native_handle_close(handle);
91        native_handle_delete(const_cast<native_handle*>(handle));
92    } else if (mOwner == ownData) {
93        GraphicBufferAllocator& allocator(GraphicBufferAllocator::get());
94        allocator.free(handle);
95    }
96}
97
98status_t GraphicBuffer::initCheck() const {
99    return mInitCheck;
100}
101
102android_native_buffer_t* GraphicBuffer::getNativeBuffer() const
103{
104    return static_cast<android_native_buffer_t*>(
105            const_cast<GraphicBuffer*>(this));
106}
107
108status_t GraphicBuffer::reallocate(uint32_t w, uint32_t h, PixelFormat f,
109        uint32_t reqUsage)
110{
111    if (mOwner != ownData)
112        return INVALID_OPERATION;
113
114    if (handle) {
115        GraphicBufferAllocator& allocator(GraphicBufferAllocator::get());
116        allocator.free(handle);
117        handle = 0;
118    }
119    return initSize(w, h, f, reqUsage);
120}
121
122status_t GraphicBuffer::initSize(uint32_t w, uint32_t h, PixelFormat format,
123        uint32_t reqUsage)
124{
125    GraphicBufferAllocator& allocator = GraphicBufferAllocator::get();
126    status_t err = allocator.alloc(w, h, format, reqUsage, &handle, &stride);
127
128    if (err<0 && format == PIXEL_FORMAT_RGBX_8888) {
129        /*
130         * There is currently a bug with some gralloc implementations
131         * not supporting RGBX_8888. In this case, we revert to using RGBA_8888
132         * which is not exactly the same, as GL_REPLACE will yield a different
133         * result.
134         */
135        format = PIXEL_FORMAT_RGBA_8888;
136        err = allocator.alloc(w, h, format, reqUsage, &handle, &stride);
137    }
138
139    if (err == NO_ERROR) {
140        this->width  = w;
141        this->height = h;
142        this->format = format;
143        this->usage  = reqUsage;
144    }
145    return err;
146}
147
148status_t GraphicBuffer::lock(uint32_t usage, void** vaddr)
149{
150    const Rect lockBounds(width, height);
151    status_t res = lock(usage, lockBounds, vaddr);
152    return res;
153}
154
155status_t GraphicBuffer::lock(uint32_t usage, const Rect& rect, void** vaddr)
156{
157    if (rect.left < 0 || rect.right  > this->width ||
158        rect.top  < 0 || rect.bottom > this->height) {
159        LOGE("locking pixels (%d,%d,%d,%d) outside of buffer (w=%d, h=%d)",
160                rect.left, rect.top, rect.right, rect.bottom,
161                this->width, this->height);
162        return BAD_VALUE;
163    }
164    status_t res = getBufferMapper().lock(handle, usage, rect, vaddr);
165    return res;
166}
167
168status_t GraphicBuffer::unlock()
169{
170    status_t res = getBufferMapper().unlock(handle);
171    return res;
172}
173
174status_t GraphicBuffer::lock(GGLSurface* sur, uint32_t usage)
175{
176    void* vaddr;
177    status_t res = GraphicBuffer::lock(usage, &vaddr);
178    if (res == NO_ERROR && sur) {
179        sur->version = sizeof(GGLSurface);
180        sur->width = width;
181        sur->height = height;
182        sur->stride = stride;
183        sur->format = format;
184        sur->data = static_cast<GGLubyte*>(vaddr);
185    }
186    return res;
187}
188
189size_t GraphicBuffer::getFlattenedSize() const {
190    return (8 + (handle ? handle->numInts : 0))*sizeof(int);
191}
192
193size_t GraphicBuffer::getFdCount() const {
194    return handle ? handle->numFds : 0;
195}
196
197status_t GraphicBuffer::flatten(void* buffer, size_t size,
198        int fds[], size_t count) const
199{
200    size_t sizeNeeded = GraphicBuffer::getFlattenedSize();
201    if (size < sizeNeeded) return NO_MEMORY;
202
203    size_t fdCountNeeded = GraphicBuffer::getFdCount();
204    if (count < fdCountNeeded) return NO_MEMORY;
205
206    int* buf = static_cast<int*>(buffer);
207    buf[0] = 'GBFR';
208    buf[1] = width;
209    buf[2] = height;
210    buf[3] = stride;
211    buf[4] = format;
212    buf[5] = usage;
213    buf[6] = 0;
214    buf[7] = 0;
215
216    if (handle) {
217        buf[6] = handle->numFds;
218        buf[7] = handle->numInts;
219        native_handle_t const* const h = handle;
220        memcpy(fds,     h->data,             h->numFds*sizeof(int));
221        memcpy(&buf[8], h->data + h->numFds, h->numInts*sizeof(int));
222    }
223
224    return NO_ERROR;
225}
226
227status_t GraphicBuffer::unflatten(void const* buffer, size_t size,
228        int fds[], size_t count)
229{
230    if (size < 8*sizeof(int)) return NO_MEMORY;
231
232    int const* buf = static_cast<int const*>(buffer);
233    if (buf[0] != 'GBFR') return BAD_TYPE;
234
235    const size_t numFds  = buf[6];
236    const size_t numInts = buf[7];
237
238    const size_t sizeNeeded = (8 + numInts) * sizeof(int);
239    if (size < sizeNeeded) return NO_MEMORY;
240
241    size_t fdCountNeeded = 0;
242    if (count < fdCountNeeded) return NO_MEMORY;
243
244    if (handle) {
245        // free previous handle if any
246        free_handle();
247    }
248
249    if (numFds || numInts) {
250        width  = buf[1];
251        height = buf[2];
252        stride = buf[3];
253        format = buf[4];
254        usage  = buf[5];
255        native_handle* h = native_handle_create(numFds, numInts);
256        memcpy(h->data,          fds,     numFds*sizeof(int));
257        memcpy(h->data + numFds, &buf[8], numInts*sizeof(int));
258        handle = h;
259    } else {
260        width = height = stride = format = usage = 0;
261        handle = NULL;
262    }
263
264    mOwner = ownHandle;
265    return NO_ERROR;
266}
267
268
269void GraphicBuffer::setIndex(int index) {
270    mIndex = index;
271}
272
273int GraphicBuffer::getIndex() const {
274    return mIndex;
275}
276
277// ---------------------------------------------------------------------------
278
279}; // namespace android
280