FramebufferNativeWindow.cpp revision 55ef343331f5efbfe3e01bc9993d94faea236048 
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
33#include <EGL/egl.h>
34
35#include <pixelflinger/format.h>
36#include <pixelflinger/pixelflinger.h>
37
38#include <hardware/hardware.h>
39#include <hardware/gralloc.h>
40
41#include <private/ui/android_natives_priv.h>
42
43// ----------------------------------------------------------------------------
44namespace android {
45// ----------------------------------------------------------------------------
46
47class NativeBuffer
48    : public EGLNativeBase<
49        ANativeWindowBuffer,
50        NativeBuffer,
51        LightRefBase<NativeBuffer> >
52{
53public:
54    NativeBuffer(int w, int h, int f, int u) : BASE() {
55        ANativeWindowBuffer::width  = w;
56        ANativeWindowBuffer::height = h;
57        ANativeWindowBuffer::format = f;
58        ANativeWindowBuffer::usage  = u;
59    }
60private:
61    friend class LightRefBase<NativeBuffer>;
62    ~NativeBuffer() { }; // this class cannot be overloaded
63};
64
65
66/*
67 * This implements the (main) framebuffer management. This class is used
68 * mostly by SurfaceFlinger, but also by command line GL application.
69 *
70 * In fact this is an implementation of ANativeWindow on top of
71 * the framebuffer.
72 *
73 * Currently it is pretty simple, it manages only two buffers (the front and
74 * back buffer).
75 *
76 */
77
78FramebufferNativeWindow::FramebufferNativeWindow()
79    : BASE(), fbDev(0), grDev(0), mUpdateOnDemand(false)
80{
81    hw_module_t const* module;
82    if (hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module) == 0) {
83        int stride;
84        int err;
85        int i;
86        err = framebuffer_open(module, &fbDev);
87        ALOGE_IF(err, "couldn't open framebuffer HAL (%s)", strerror(-err));
88
89        err = gralloc_open(module, &grDev);
90        ALOGE_IF(err, "couldn't open gralloc HAL (%s)", strerror(-err));
91
92        // bail out if we can't initialize the modules
93        if (!fbDev || !grDev)
94            return;
95
96        mUpdateOnDemand = (fbDev->setUpdateRect != 0);
97
98        // initialize the buffer FIFO
99        mNumBuffers = NUM_FRAME_BUFFERS;
100        mNumFreeBuffers = NUM_FRAME_BUFFERS;
101        mBufferHead = mNumBuffers-1;
102
103        for (i = 0; i < mNumBuffers; i++)
104        {
105                buffers[i] = new NativeBuffer(
106                        fbDev->width, fbDev->height, fbDev->format, GRALLOC_USAGE_HW_FB);
107        }
108
109        for (i = 0; i < mNumBuffers; i++)
110        {
111                err = grDev->alloc(grDev,
112                        fbDev->width, fbDev->height, fbDev->format,
113                        GRALLOC_USAGE_HW_FB, &buffers[i]->handle, &buffers[i]->stride);
114
115                ALOGE_IF(err, "fb buffer %d allocation failed w=%d, h=%d, err=%s",
116                        i, fbDev->width, fbDev->height, strerror(-err));
117
118                if (err)
119                {
120                        mNumBuffers = i;
121                        mNumFreeBuffers = i;
122                        mBufferHead = mNumBuffers-1;
123                        break;
124                }
125        }
126
127        const_cast<uint32_t&>(ANativeWindow::flags) = fbDev->flags;
128        const_cast<float&>(ANativeWindow::xdpi) = fbDev->xdpi;
129        const_cast<float&>(ANativeWindow::ydpi) = fbDev->ydpi;
130        const_cast<int&>(ANativeWindow::minSwapInterval) =
131            fbDev->minSwapInterval;
132        const_cast<int&>(ANativeWindow::maxSwapInterval) =
133            fbDev->maxSwapInterval;
134    } else {
135        ALOGE("Couldn't get gralloc module");
136    }
137
138    ANativeWindow::setSwapInterval = setSwapInterval;
139    ANativeWindow::dequeueBuffer = dequeueBuffer;
140    ANativeWindow::lockBuffer = lockBuffer;
141    ANativeWindow::queueBuffer = queueBuffer;
142    ANativeWindow::query = query;
143    ANativeWindow::perform = perform;
144}
145
146FramebufferNativeWindow::~FramebufferNativeWindow()
147{
148    if (grDev) {
149        if (buffers[0] != NULL)
150            grDev->free(grDev, buffers[0]->handle);
151        if (buffers[1] != NULL)
152            grDev->free(grDev, buffers[1]->handle);
153        gralloc_close(grDev);
154    }
155
156    if (fbDev) {
157        framebuffer_close(fbDev);
158    }
159}
160
161status_t FramebufferNativeWindow::setUpdateRectangle(const Rect& r)
162{
163    if (!mUpdateOnDemand) {
164        return INVALID_OPERATION;
165    }
166    return fbDev->setUpdateRect(fbDev, r.left, r.top, r.width(), r.height());
167}
168
169status_t FramebufferNativeWindow::compositionComplete()
170{
171    if (fbDev->compositionComplete) {
172        return fbDev->compositionComplete(fbDev);
173    }
174    return INVALID_OPERATION;
175}
176
177int FramebufferNativeWindow::setSwapInterval(
178        ANativeWindow* window, int interval)
179{
180    framebuffer_device_t* fb = getSelf(window)->fbDev;
181    return fb->setSwapInterval(fb, interval);
182}
183
184void FramebufferNativeWindow::dump(String8& result) {
185    if (fbDev->common.version >= 1 && fbDev->dump) {
186        const size_t SIZE = 4096;
187        char buffer[SIZE];
188
189        fbDev->dump(fbDev, buffer, SIZE);
190        result.append(buffer);
191    }
192}
193
194// only for debugging / logging
195int FramebufferNativeWindow::getCurrentBufferIndex() const
196{
197    Mutex::Autolock _l(mutex);
198    const int index = mCurrentBufferIndex;
199    return index;
200}
201
202int FramebufferNativeWindow::dequeueBuffer(ANativeWindow* window,
203        ANativeWindowBuffer** buffer)
204{
205    FramebufferNativeWindow* self = getSelf(window);
206    Mutex::Autolock _l(self->mutex);
207    framebuffer_device_t* fb = self->fbDev;
208
209    int index = self->mBufferHead++;
210    if (self->mBufferHead >= self->mNumBuffers)
211        self->mBufferHead = 0;
212
213    // wait for a free buffer
214    while (!self->mNumFreeBuffers) {
215        self->mCondition.wait(self->mutex);
216    }
217    // get this buffer
218    self->mNumFreeBuffers--;
219    self->mCurrentBufferIndex = index;
220
221    *buffer = self->buffers[index].get();
222
223    return 0;
224}
225
226int FramebufferNativeWindow::lockBuffer(ANativeWindow* window,
227        ANativeWindowBuffer* buffer)
228{
229    FramebufferNativeWindow* self = getSelf(window);
230    Mutex::Autolock _l(self->mutex);
231
232    const int index = self->mCurrentBufferIndex;
233
234    // wait that the buffer we're locking is not front anymore
235    while (self->front == buffer) {
236        self->mCondition.wait(self->mutex);
237    }
238
239    return NO_ERROR;
240}
241
242int FramebufferNativeWindow::queueBuffer(ANativeWindow* window,
243        ANativeWindowBuffer* buffer)
244{
245    FramebufferNativeWindow* self = getSelf(window);
246    Mutex::Autolock _l(self->mutex);
247    framebuffer_device_t* fb = self->fbDev;
248    buffer_handle_t handle = static_cast<NativeBuffer*>(buffer)->handle;
249
250    const int index = self->mCurrentBufferIndex;
251    int res = fb->post(fb, handle);
252    self->front = static_cast<NativeBuffer*>(buffer);
253    self->mNumFreeBuffers++;
254    self->mCondition.broadcast();
255    return res;
256}
257
258int FramebufferNativeWindow::query(const ANativeWindow* window,
259        int what, int* value)
260{
261    const FramebufferNativeWindow* self = getSelf(window);
262    Mutex::Autolock _l(self->mutex);
263    framebuffer_device_t* fb = self->fbDev;
264    switch (what) {
265        case NATIVE_WINDOW_WIDTH:
266            *value = fb->width;
267            return NO_ERROR;
268        case NATIVE_WINDOW_HEIGHT:
269            *value = fb->height;
270            return NO_ERROR;
271        case NATIVE_WINDOW_FORMAT:
272            *value = fb->format;
273            return NO_ERROR;
274        case NATIVE_WINDOW_CONCRETE_TYPE:
275            *value = NATIVE_WINDOW_FRAMEBUFFER;
276            return NO_ERROR;
277        case NATIVE_WINDOW_QUEUES_TO_WINDOW_COMPOSER:
278            *value = 0;
279            return NO_ERROR;
280        case NATIVE_WINDOW_DEFAULT_WIDTH:
281            *value = fb->width;
282            return NO_ERROR;
283        case NATIVE_WINDOW_DEFAULT_HEIGHT:
284            *value = fb->height;
285            return NO_ERROR;
286        case NATIVE_WINDOW_TRANSFORM_HINT:
287            *value = 0;
288            return NO_ERROR;
289    }
290    *value = 0;
291    return BAD_VALUE;
292}
293
294int FramebufferNativeWindow::perform(ANativeWindow* window,
295        int operation, ...)
296{
297    switch (operation) {
298        case NATIVE_WINDOW_CONNECT:
299        case NATIVE_WINDOW_DISCONNECT:
300        case NATIVE_WINDOW_SET_USAGE:
301        case NATIVE_WINDOW_SET_BUFFERS_GEOMETRY:
302        case NATIVE_WINDOW_SET_BUFFERS_DIMENSIONS:
303        case NATIVE_WINDOW_SET_BUFFERS_FORMAT:
304        case NATIVE_WINDOW_SET_BUFFERS_TRANSFORM:
305        case NATIVE_WINDOW_API_CONNECT:
306        case NATIVE_WINDOW_API_DISCONNECT:
307            // TODO: we should implement these
308            return NO_ERROR;
309
310        case NATIVE_WINDOW_LOCK:
311        case NATIVE_WINDOW_UNLOCK_AND_POST:
312        case NATIVE_WINDOW_SET_CROP:
313        case NATIVE_WINDOW_SET_BUFFER_COUNT:
314        case NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP:
315        case NATIVE_WINDOW_SET_SCALING_MODE:
316            return INVALID_OPERATION;
317    }
318    return NAME_NOT_FOUND;
319}
320
321// ----------------------------------------------------------------------------
322}; // namespace android
323// ----------------------------------------------------------------------------
324
325using namespace android;
326
327EGLNativeWindowType android_createDisplaySurface(void)
328{
329    FramebufferNativeWindow* w;
330    w = new FramebufferNativeWindow();
331    if (w->getDevice() == NULL) {
332        // get a ref so it can be destroyed when we exit this block
333        sp<FramebufferNativeWindow> ref(w);
334        return NULL;
335    }
336    return (EGLNativeWindowType)w;
337}
338