FramebufferNativeWindow.cpp revision e6f43ddce78d6846af12550ff9193c5c6fe5844b 
1/*
2**
3** Copyright 2007 The Android Open Source Project
4**
5** Licensed under the Apache License Version 2.0(the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing software
12** distributed under the License is distributed on an "AS IS" BASIS
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#define LOG_TAG "FramebufferNativeWindow"
19
20#include <stdlib.h>
21#include <stdio.h>
22#include <string.h>
23#include <errno.h>
24
25#include <cutils/log.h>
26#include <cutils/atomic.h>
27#include <utils/threads.h>
28#include <utils/RefBase.h>
29
30#include <ui/Rect.h>
31#include <ui/FramebufferNativeWindow.h>
32#include <ui/GraphicLog.h>
33
34#include <EGL/egl.h>
35
36#include <pixelflinger/format.h>
37#include <pixelflinger/pixelflinger.h>
38
39#include <hardware/hardware.h>
40#include <hardware/gralloc.h>
41
42#include <private/ui/android_natives_priv.h>
43
44// ----------------------------------------------------------------------------
45namespace android {
46// ----------------------------------------------------------------------------
47
48class NativeBuffer
49    : public EGLNativeBase<
50        ANativeWindowBuffer,
51        NativeBuffer,
52        LightRefBase<NativeBuffer> >
53{
54public:
55    NativeBuffer(int w, int h, int f, int u) : BASE() {
56        ANativeWindowBuffer::width  = w;
57        ANativeWindowBuffer::height = h;
58        ANativeWindowBuffer::format = f;
59        ANativeWindowBuffer::usage  = u;
60    }
61private:
62    friend class LightRefBase<NativeBuffer>;
63    ~NativeBuffer() { }; // this class cannot be overloaded
64};
65
66
67/*
68 * This implements the (main) framebuffer management. This class is used
69 * mostly by SurfaceFlinger, but also by command line GL application.
70 *
71 * In fact this is an implementation of ANativeWindow on top of
72 * the framebuffer.
73 *
74 * Currently it is pretty simple, it manages only two buffers (the front and
75 * back buffer).
76 *
77 */
78
79FramebufferNativeWindow::FramebufferNativeWindow()
80    : BASE(), fbDev(0), grDev(0), mUpdateOnDemand(false)
81{
82    hw_module_t const* module;
83    if (hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module) == 0) {
84        int stride;
85        int err;
86        int i;
87        err = framebuffer_open(module, &fbDev);
88        ALOGE_IF(err, "couldn't open framebuffer HAL (%s)", strerror(-err));
89
90        err = gralloc_open(module, &grDev);
91        ALOGE_IF(err, "couldn't open gralloc HAL (%s)", strerror(-err));
92
93        // bail out if we can't initialize the modules
94        if (!fbDev || !grDev)
95            return;
96
97        mUpdateOnDemand = (fbDev->setUpdateRect != 0);
98
99        // initialize the buffer FIFO
100        mNumBuffers = NUM_FRAME_BUFFERS;
101        mNumFreeBuffers = NUM_FRAME_BUFFERS;
102        mBufferHead = mNumBuffers-1;
103
104        for (i = 0; i < mNumBuffers; i++)
105        {
106                buffers[i] = new NativeBuffer(
107                        fbDev->width, fbDev->height, fbDev->format, GRALLOC_USAGE_HW_FB);
108        }
109
110        for (i = 0; i < mNumBuffers; i++)
111        {
112                err = grDev->alloc(grDev,
113                        fbDev->width, fbDev->height, fbDev->format,
114                        GRALLOC_USAGE_HW_FB, &buffers[i]->handle, &buffers[i]->stride);
115
116                ALOGE_IF(err, "fb buffer %d allocation failed w=%d, h=%d, err=%s",
117                        i, fbDev->width, fbDev->height, strerror(-err));
118
119                if (err)
120                {
121                        mNumBuffers = i;
122                        mNumFreeBuffers = i;
123                        mBufferHead = mNumBuffers-1;
124                        break;
125                }
126        }
127
128        const_cast<uint32_t&>(ANativeWindow::flags) = fbDev->flags;
129        const_cast<float&>(ANativeWindow::xdpi) = fbDev->xdpi;
130        const_cast<float&>(ANativeWindow::ydpi) = fbDev->ydpi;
131        const_cast<int&>(ANativeWindow::minSwapInterval) =
132            fbDev->minSwapInterval;
133        const_cast<int&>(ANativeWindow::maxSwapInterval) =
134            fbDev->maxSwapInterval;
135    } else {
136        ALOGE("Couldn't get gralloc module");
137    }
138
139    ANativeWindow::setSwapInterval = setSwapInterval;
140    ANativeWindow::dequeueBuffer = dequeueBuffer;
141    ANativeWindow::lockBuffer = lockBuffer;
142    ANativeWindow::queueBuffer = queueBuffer;
143    ANativeWindow::query = query;
144    ANativeWindow::perform = perform;
145}
146
147FramebufferNativeWindow::~FramebufferNativeWindow()
148{
149    if (grDev) {
150        if (buffers[0] != NULL)
151            grDev->free(grDev, buffers[0]->handle);
152        if (buffers[1] != NULL)
153            grDev->free(grDev, buffers[1]->handle);
154        gralloc_close(grDev);
155    }
156
157    if (fbDev) {
158        framebuffer_close(fbDev);
159    }
160}
161
162status_t FramebufferNativeWindow::setUpdateRectangle(const Rect& r)
163{
164    if (!mUpdateOnDemand) {
165        return INVALID_OPERATION;
166    }
167    return fbDev->setUpdateRect(fbDev, r.left, r.top, r.width(), r.height());
168}
169
170status_t FramebufferNativeWindow::compositionComplete()
171{
172    if (fbDev->compositionComplete) {
173        return fbDev->compositionComplete(fbDev);
174    }
175    return INVALID_OPERATION;
176}
177
178int FramebufferNativeWindow::setSwapInterval(
179        ANativeWindow* window, int interval)
180{
181    framebuffer_device_t* fb = getSelf(window)->fbDev;
182    return fb->setSwapInterval(fb, interval);
183}
184
185void FramebufferNativeWindow::dump(String8& result) {
186    if (fbDev->common.version >= 1 && fbDev->dump) {
187        const size_t SIZE = 4096;
188        char buffer[SIZE];
189
190        fbDev->dump(fbDev, buffer, SIZE);
191        result.append(buffer);
192    }
193}
194
195// only for debugging / logging
196int FramebufferNativeWindow::getCurrentBufferIndex() const
197{
198    Mutex::Autolock _l(mutex);
199    const int index = mCurrentBufferIndex;
200    return index;
201}
202
203int FramebufferNativeWindow::dequeueBuffer(ANativeWindow* window,
204        ANativeWindowBuffer** buffer)
205{
206    FramebufferNativeWindow* self = getSelf(window);
207    Mutex::Autolock _l(self->mutex);
208    framebuffer_device_t* fb = self->fbDev;
209
210    int index = self->mBufferHead++;
211    if (self->mBufferHead >= self->mNumBuffers)
212        self->mBufferHead = 0;
213
214    GraphicLog& logger(GraphicLog::getInstance());
215    logger.log(GraphicLog::SF_FB_DEQUEUE_BEFORE, index);
216
217    // wait for a free buffer
218    while (!self->mNumFreeBuffers) {
219        self->mCondition.wait(self->mutex);
220    }
221    // get this buffer
222    self->mNumFreeBuffers--;
223    self->mCurrentBufferIndex = index;
224
225    *buffer = self->buffers[index].get();
226
227    logger.log(GraphicLog::SF_FB_DEQUEUE_AFTER, index);
228    return 0;
229}
230
231int FramebufferNativeWindow::lockBuffer(ANativeWindow* window,
232        ANativeWindowBuffer* buffer)
233{
234    FramebufferNativeWindow* self = getSelf(window);
235    Mutex::Autolock _l(self->mutex);
236
237    const int index = self->mCurrentBufferIndex;
238    GraphicLog& logger(GraphicLog::getInstance());
239    logger.log(GraphicLog::SF_FB_LOCK_BEFORE, index);
240
241    // wait that the buffer we're locking is not front anymore
242    while (self->front == buffer) {
243        self->mCondition.wait(self->mutex);
244    }
245
246    logger.log(GraphicLog::SF_FB_LOCK_AFTER, index);
247
248    return NO_ERROR;
249}
250
251int FramebufferNativeWindow::queueBuffer(ANativeWindow* window,
252        ANativeWindowBuffer* buffer)
253{
254    FramebufferNativeWindow* self = getSelf(window);
255    Mutex::Autolock _l(self->mutex);
256    framebuffer_device_t* fb = self->fbDev;
257    buffer_handle_t handle = static_cast<NativeBuffer*>(buffer)->handle;
258
259    const int index = self->mCurrentBufferIndex;
260    GraphicLog& logger(GraphicLog::getInstance());
261    logger.log(GraphicLog::SF_FB_POST_BEFORE, index);
262
263    int res = fb->post(fb, handle);
264
265    logger.log(GraphicLog::SF_FB_POST_AFTER, index);
266
267    self->front = static_cast<NativeBuffer*>(buffer);
268    self->mNumFreeBuffers++;
269    self->mCondition.broadcast();
270    return res;
271}
272
273int FramebufferNativeWindow::query(const ANativeWindow* window,
274        int what, int* value)
275{
276    const FramebufferNativeWindow* self = getSelf(window);
277    Mutex::Autolock _l(self->mutex);
278    framebuffer_device_t* fb = self->fbDev;
279    switch (what) {
280        case NATIVE_WINDOW_WIDTH:
281            *value = fb->width;
282            return NO_ERROR;
283        case NATIVE_WINDOW_HEIGHT:
284            *value = fb->height;
285            return NO_ERROR;
286        case NATIVE_WINDOW_FORMAT:
287            *value = fb->format;
288            return NO_ERROR;
289        case NATIVE_WINDOW_CONCRETE_TYPE:
290            *value = NATIVE_WINDOW_FRAMEBUFFER;
291            return NO_ERROR;
292        case NATIVE_WINDOW_QUEUES_TO_WINDOW_COMPOSER:
293            *value = 0;
294            return NO_ERROR;
295        case NATIVE_WINDOW_DEFAULT_WIDTH:
296            *value = fb->width;
297            return NO_ERROR;
298        case NATIVE_WINDOW_DEFAULT_HEIGHT:
299            *value = fb->height;
300            return NO_ERROR;
301        case NATIVE_WINDOW_TRANSFORM_HINT:
302            *value = 0;
303            return NO_ERROR;
304    }
305    *value = 0;
306    return BAD_VALUE;
307}
308
309int FramebufferNativeWindow::perform(ANativeWindow* window,
310        int operation, ...)
311{
312    switch (operation) {
313        case NATIVE_WINDOW_CONNECT:
314        case NATIVE_WINDOW_DISCONNECT:
315        case NATIVE_WINDOW_SET_USAGE:
316        case NATIVE_WINDOW_SET_BUFFERS_GEOMETRY:
317        case NATIVE_WINDOW_SET_BUFFERS_DIMENSIONS:
318        case NATIVE_WINDOW_SET_BUFFERS_FORMAT:
319        case NATIVE_WINDOW_SET_BUFFERS_TRANSFORM:
320        case NATIVE_WINDOW_API_CONNECT:
321        case NATIVE_WINDOW_API_DISCONNECT:
322            // TODO: we should implement these
323            return NO_ERROR;
324
325        case NATIVE_WINDOW_LOCK:
326        case NATIVE_WINDOW_UNLOCK_AND_POST:
327        case NATIVE_WINDOW_SET_CROP:
328        case NATIVE_WINDOW_SET_BUFFER_COUNT:
329        case NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP:
330        case NATIVE_WINDOW_SET_SCALING_MODE:
331            return INVALID_OPERATION;
332    }
333    return NAME_NOT_FOUND;
334}
335
336// ----------------------------------------------------------------------------
337}; // namespace android
338// ----------------------------------------------------------------------------
339
340using namespace android;
341
342EGLNativeWindowType android_createDisplaySurface(void)
343{
344    FramebufferNativeWindow* w;
345    w = new FramebufferNativeWindow();
346    if (w->getDevice() == NULL) {
347        // get a ref so it can be destroyed when we exit this block
348        sp<FramebufferNativeWindow> ref(w);
349        return NULL;
350    }
351    return (EGLNativeWindowType)w;
352}
353