summaryrefslogtreecommitdiffstats
path: root/libs/ui/FramebufferNativeWindow.cpp
blob: 9c10c754ba0a9713bc9462f8758129880c311f78 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
/* 
**
** Copyright 2007 The Android Open Source Project
**
** Licensed under the Apache License Version 2.0(the "License"); 
** you may not use this file except in compliance with the License. 
** You may obtain a copy of the License at 
**
**     http://www.apache.org/licenses/LICENSE-2.0 
**
** Unless required by applicable law or agreed to in writing software 
** distributed under the License is distributed on an "AS IS" BASIS 
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND either express or implied. 
** See the License for the specific language governing permissions and 
** limitations under the License.
*/

#define LOG_TAG "FramebufferNativeWindow"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>

#include <cutils/log.h>
#include <cutils/atomic.h>
#include <utils/threads.h>
#include <utils/RefBase.h>

#include <ui/Rect.h>
#include <ui/FramebufferNativeWindow.h>
#include <ui/GraphicLog.h>

#include <EGL/egl.h>

#include <pixelflinger/format.h>
#include <pixelflinger/pixelflinger.h>

#include <hardware/hardware.h>
#include <hardware/gralloc.h>

#include <private/ui/android_natives_priv.h>

// ----------------------------------------------------------------------------
namespace android {
// ----------------------------------------------------------------------------

class NativeBuffer 
    : public EGLNativeBase<
        ANativeWindowBuffer, 
        NativeBuffer, 
        LightRefBase<NativeBuffer> >
{
public:
    NativeBuffer(int w, int h, int f, int u) : BASE() {
        ANativeWindowBuffer::width  = w;
        ANativeWindowBuffer::height = h;
        ANativeWindowBuffer::format = f;
        ANativeWindowBuffer::usage  = u;
    }
private:
    friend class LightRefBase<NativeBuffer>;    
    ~NativeBuffer() { }; // this class cannot be overloaded
};


/*
 * This implements the (main) framebuffer management. This class is used
 * mostly by SurfaceFlinger, but also by command line GL application.
 * 
 * In fact this is an implementation of ANativeWindow on top of
 * the framebuffer.
 * 
 * Currently it is pretty simple, it manages only two buffers (the front and 
 * back buffer).
 * 
 */

FramebufferNativeWindow::FramebufferNativeWindow() 
    : BASE(), fbDev(0), grDev(0), mUpdateOnDemand(false)
{
    hw_module_t const* module;
    if (hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module) == 0) {
        int stride;
        int err;
        int i;
        err = framebuffer_open(module, &fbDev);
        LOGE_IF(err, "couldn't open framebuffer HAL (%s)", strerror(-err));
        
        err = gralloc_open(module, &grDev);
        LOGE_IF(err, "couldn't open gralloc HAL (%s)", strerror(-err));

        // bail out if we can't initialize the modules
        if (!fbDev || !grDev)
            return;
        
        mUpdateOnDemand = (fbDev->setUpdateRect != 0);
        
        // initialize the buffer FIFO
        mNumBuffers = NUM_FRAME_BUFFERS;
        mNumFreeBuffers = NUM_FRAME_BUFFERS;
        mBufferHead = mNumBuffers-1;

        for (i = 0; i < mNumBuffers; i++)
        {
                buffers[i] = new NativeBuffer(
                        fbDev->width, fbDev->height, fbDev->format, GRALLOC_USAGE_HW_FB);
        }

        for (i = 0; i < mNumBuffers; i++)
        {
                err = grDev->alloc(grDev,
                        fbDev->width, fbDev->height, fbDev->format,
                        GRALLOC_USAGE_HW_FB, &buffers[i]->handle, &buffers[i]->stride);

                LOGE_IF(err, "fb buffer %d allocation failed w=%d, h=%d, err=%s",
                        i, fbDev->width, fbDev->height, strerror(-err));

                if (err)
                {
                        mNumBuffers = i;
                        mNumFreeBuffers = i;
                        mBufferHead = mNumBuffers-1;
                        break;
                }
        }

        const_cast<uint32_t&>(ANativeWindow::flags) = fbDev->flags; 
        const_cast<float&>(ANativeWindow::xdpi) = fbDev->xdpi;
        const_cast<float&>(ANativeWindow::ydpi) = fbDev->ydpi;
        const_cast<int&>(ANativeWindow::minSwapInterval) = 
            fbDev->minSwapInterval;
        const_cast<int&>(ANativeWindow::maxSwapInterval) = 
            fbDev->maxSwapInterval;
    } else {
        LOGE("Couldn't get gralloc module");
    }

    ANativeWindow::setSwapInterval = setSwapInterval;
    ANativeWindow::dequeueBuffer = dequeueBuffer;
    ANativeWindow::lockBuffer = lockBuffer;
    ANativeWindow::queueBuffer = queueBuffer;
    ANativeWindow::query = query;
    ANativeWindow::perform = perform;
}

FramebufferNativeWindow::~FramebufferNativeWindow() 
{
    if (grDev) {
        if (buffers[0] != NULL)
            grDev->free(grDev, buffers[0]->handle);
        if (buffers[1] != NULL)
            grDev->free(grDev, buffers[1]->handle);
        gralloc_close(grDev);
    }

    if (fbDev) {
        framebuffer_close(fbDev);
    }
}

status_t FramebufferNativeWindow::setUpdateRectangle(const Rect& r) 
{
    if (!mUpdateOnDemand) {
        return INVALID_OPERATION;
    }
    return fbDev->setUpdateRect(fbDev, r.left, r.top, r.width(), r.height());
}

status_t FramebufferNativeWindow::compositionComplete()
{
    if (fbDev->compositionComplete) {
        return fbDev->compositionComplete(fbDev);
    }
    return INVALID_OPERATION;
}

int FramebufferNativeWindow::setSwapInterval(
        ANativeWindow* window, int interval) 
{
    framebuffer_device_t* fb = getSelf(window)->fbDev;
    return fb->setSwapInterval(fb, interval);
}

void FramebufferNativeWindow::dump(String8& result) {
    if (fbDev->common.version >= 1 && fbDev->dump) {
        const size_t SIZE = 4096;
        char buffer[SIZE];

        fbDev->dump(fbDev, buffer, SIZE);
        result.append(buffer);
    }
}

// only for debugging / logging
int FramebufferNativeWindow::getCurrentBufferIndex() const
{
    Mutex::Autolock _l(mutex);
    const int index = mCurrentBufferIndex;
    return index;
}

int FramebufferNativeWindow::dequeueBuffer(ANativeWindow* window, 
        ANativeWindowBuffer** buffer)
{
    FramebufferNativeWindow* self = getSelf(window);
    Mutex::Autolock _l(self->mutex);
    framebuffer_device_t* fb = self->fbDev;

    int index = self->mBufferHead++;
    if (self->mBufferHead >= self->mNumBuffers)
        self->mBufferHead = 0;

    GraphicLog& logger(GraphicLog::getInstance());
    logger.log(GraphicLog::SF_FB_DEQUEUE_BEFORE, index);

    // wait for a free buffer
    while (!self->mNumFreeBuffers) {
        self->mCondition.wait(self->mutex);
    }
    // get this buffer
    self->mNumFreeBuffers--;
    self->mCurrentBufferIndex = index;

    *buffer = self->buffers[index].get();

    logger.log(GraphicLog::SF_FB_DEQUEUE_AFTER, index);
    return 0;
}

int FramebufferNativeWindow::lockBuffer(ANativeWindow* window, 
        ANativeWindowBuffer* buffer)
{
    FramebufferNativeWindow* self = getSelf(window);
    Mutex::Autolock _l(self->mutex);

    const int index = self->mCurrentBufferIndex;
    GraphicLog& logger(GraphicLog::getInstance());
    logger.log(GraphicLog::SF_FB_LOCK_BEFORE, index);

    // wait that the buffer we're locking is not front anymore
    while (self->front == buffer) {
        self->mCondition.wait(self->mutex);
    }

    logger.log(GraphicLog::SF_FB_LOCK_AFTER, index);

    return NO_ERROR;
}

int FramebufferNativeWindow::queueBuffer(ANativeWindow* window, 
        ANativeWindowBuffer* buffer)
{
    FramebufferNativeWindow* self = getSelf(window);
    Mutex::Autolock _l(self->mutex);
    framebuffer_device_t* fb = self->fbDev;
    buffer_handle_t handle = static_cast<NativeBuffer*>(buffer)->handle;

    const int index = self->mCurrentBufferIndex;
    GraphicLog& logger(GraphicLog::getInstance());
    logger.log(GraphicLog::SF_FB_POST_BEFORE, index);

    int res = fb->post(fb, handle);

    logger.log(GraphicLog::SF_FB_POST_AFTER, index);

    self->front = static_cast<NativeBuffer*>(buffer);
    self->mNumFreeBuffers++;
    self->mCondition.broadcast();
    return res;
}

int FramebufferNativeWindow::query(const ANativeWindow* window,
        int what, int* value) 
{
    const FramebufferNativeWindow* self = getSelf(window);
    Mutex::Autolock _l(self->mutex);
    framebuffer_device_t* fb = self->fbDev;
    switch (what) {
        case NATIVE_WINDOW_WIDTH:
            *value = fb->width;
            return NO_ERROR;
        case NATIVE_WINDOW_HEIGHT:
            *value = fb->height;
            return NO_ERROR;
        case NATIVE_WINDOW_FORMAT:
            *value = fb->format;
            return NO_ERROR;
        case NATIVE_WINDOW_CONCRETE_TYPE:
            *value = NATIVE_WINDOW_FRAMEBUFFER;
            return NO_ERROR;
    }
    *value = 0;
    return BAD_VALUE;
}

int FramebufferNativeWindow::perform(ANativeWindow* window,
        int operation, ...)
{
    switch (operation) {
        case NATIVE_WINDOW_SET_USAGE:
        case NATIVE_WINDOW_SET_BUFFERS_FORMAT:
        case NATIVE_WINDOW_CONNECT:
        case NATIVE_WINDOW_DISCONNECT:
            break;
        default:
            return NAME_NOT_FOUND;
    }
    return NO_ERROR;
}

// ----------------------------------------------------------------------------
}; // namespace android
// ----------------------------------------------------------------------------

using namespace android;

EGLNativeWindowType android_createDisplaySurface(void)
{
    FramebufferNativeWindow* w;
    w = new FramebufferNativeWindow();
    if (w->getDevice() == NULL) {
        // get a ref so it can be destroyed when we exit this block
        sp<FramebufferNativeWindow> ref(w);
        return NULL;
    }
    return (EGLNativeWindowType)w;
}