GraphicBuffer.cpp revision 98e71ddaede9a0bfb681fd237bec1f66c6c53193 
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),  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()
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    if (format == PIXEL_FORMAT_RGBX_8888)
126        format = PIXEL_FORMAT_RGBA_8888;
127
128    GraphicBufferAllocator& allocator = GraphicBufferAllocator::get();
129    status_t err = allocator.alloc(w, h, format, reqUsage, &handle, &stride);
130    if (err == NO_ERROR) {
131        this->width  = w;
132        this->height = h;
133        this->format = format;
134        this->usage  = reqUsage;
135        mVStride = 0;
136    }
137    return err;
138}
139
140status_t GraphicBuffer::lock(uint32_t usage, void** vaddr)
141{
142    const Rect lockBounds(width, height);
143    status_t res = lock(usage, lockBounds, vaddr);
144    return res;
145}
146
147status_t GraphicBuffer::lock(uint32_t usage, const Rect& rect, void** vaddr)
148{
149    if (rect.left < 0 || rect.right  > this->width ||
150        rect.top  < 0 || rect.bottom > this->height) {
151        LOGE("locking pixels (%d,%d,%d,%d) outside of buffer (w=%d, h=%d)",
152                rect.left, rect.top, rect.right, rect.bottom,
153                this->width, this->height);
154        return BAD_VALUE;
155    }
156    status_t res = getBufferMapper().lock(handle, usage, rect, vaddr);
157    return res;
158}
159
160status_t GraphicBuffer::unlock()
161{
162    status_t res = getBufferMapper().unlock(handle);
163    return res;
164}
165
166status_t GraphicBuffer::lock(GGLSurface* sur, uint32_t usage)
167{
168    void* vaddr;
169    status_t res = GraphicBuffer::lock(usage, &vaddr);
170    if (res == NO_ERROR && sur) {
171        sur->version = sizeof(GGLSurface);
172        sur->width = width;
173        sur->height = height;
174        sur->stride = stride;
175        sur->format = format;
176        sur->vstride = mVStride;
177        sur->data = static_cast<GGLubyte*>(vaddr);
178    }
179    return res;
180}
181
182size_t GraphicBuffer::getFlattenedSize() const {
183    return (8 + (handle ? handle->numInts : 0))*sizeof(int);
184}
185
186size_t GraphicBuffer::getFdCount() const {
187    return handle ? handle->numFds : 0;
188}
189
190status_t GraphicBuffer::flatten(void* buffer, size_t size,
191        int fds[], size_t count) const
192{
193    size_t sizeNeeded = GraphicBuffer::getFlattenedSize();
194    if (size < sizeNeeded) return NO_MEMORY;
195
196    size_t fdCountNeeded = GraphicBuffer::getFdCount();
197    if (count < fdCountNeeded) return NO_MEMORY;
198
199    int* buf = static_cast<int*>(buffer);
200    buf[0] = 'GBFR';
201    buf[1] = width;
202    buf[2] = height;
203    buf[3] = stride;
204    buf[4] = format;
205    buf[5] = usage;
206    buf[6] = 0;
207    buf[7] = 0;
208
209    if (handle) {
210        buf[6] = handle->numFds;
211        buf[7] = handle->numInts;
212        native_handle_t const* const h = handle;
213        memcpy(fds,     h->data,             h->numFds*sizeof(int));
214        memcpy(&buf[8], h->data + h->numFds, h->numInts*sizeof(int));
215    }
216
217    return NO_ERROR;
218}
219
220status_t GraphicBuffer::unflatten(void const* buffer, size_t size,
221        int fds[], size_t count)
222{
223    if (size < 8*sizeof(int)) return NO_MEMORY;
224
225    int const* buf = static_cast<int const*>(buffer);
226    if (buf[0] != 'GBFR') return BAD_TYPE;
227
228    const size_t numFds  = buf[6];
229    const size_t numInts = buf[7];
230
231    const size_t sizeNeeded = (8 + numInts) * sizeof(int);
232    if (size < sizeNeeded) return NO_MEMORY;
233
234    size_t fdCountNeeded = 0;
235    if (count < fdCountNeeded) return NO_MEMORY;
236
237    if (handle) {
238        // free previous handle if any
239        free_handle();
240    }
241
242    if (numFds || numInts) {
243        width  = buf[1];
244        height = buf[2];
245        stride = buf[3];
246        format = buf[4];
247        usage  = buf[5];
248        native_handle* h = native_handle_create(numFds, numInts);
249        memcpy(h->data,          fds,     numFds*sizeof(int));
250        memcpy(h->data + numFds, &buf[8], numInts*sizeof(int));
251        handle = h;
252    } else {
253        width = height = stride = format = usage = 0;
254        handle = NULL;
255    }
256
257    mOwner = ownHandle;
258    return NO_ERROR;
259}
260
261
262void GraphicBuffer::setIndex(int index) {
263    mIndex = index;
264}
265
266int GraphicBuffer::getIndex() const {
267    return mIndex;
268}
269
270void GraphicBuffer::setVerticalStride(uint32_t vstride) {
271    mVStride = vstride;
272}
273
274uint32_t GraphicBuffer::getVerticalStride() const {
275    return mVStride;
276}
277
278// ---------------------------------------------------------------------------
279
280}; // namespace android
281