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/*
**
** Copyright 2007 The Android Open Source Project
** Copyright (c) 2010-2011 Code Aurora Forum. All rights reserved.
**
** 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<
android_native_buffer_t,
NativeBuffer,
LightRefBase<NativeBuffer> >
{
public:
NativeBuffer(int w, int h, int f, int u) : BASE() {
android_native_buffer_t::width = w;
android_native_buffer_t::height = h;
android_native_buffer_t::format = f;
android_native_buffer_t::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;
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) {
if (grDev) {
gralloc_close(grDev);
grDev = 0;
}
if (fbDev) {
framebuffer_close(fbDev);
fbDev = 0;
}
return;
}
mUpdateOnDemand = (fbDev->setUpdateRect != 0);
// initialize the buffer FIFO
#ifdef ENABLE_GRALLOC_NUMFB
mNumBuffers = fbDev->numFramebuffers;
#else
mNumBuffers = 2;
#endif
mNumFreeBuffers = mNumBuffers;
mBufferHead = 0;
LOGD("mNumBuffers = %d", mNumBuffers);
for(int i = 0; i < mNumBuffers; i++) {
buffers[i] = new NativeBuffer(
fbDev->width, fbDev->height, fbDev->format, GRALLOC_USAGE_HW_FB);
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));
}
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::cancelBuffer = NULL;
ANativeWindow::query = query;
ANativeWindow::perform = perform;
}
FramebufferNativeWindow::~FramebufferNativeWindow()
{
LOGE_IF(!grDev, "~FramebufferNativeWindow [grDev==NULL]");
Mutex::Autolock _l(mutex);
if (grDev) {
for(int i = 0; i < mNumBuffers; i++) {
if (buffers[i] != NULL) {
grDev->free(grDev, buffers[i]->handle);
}
}
gralloc_close(grDev);
grDev = 0;
}
if (fbDev) {
framebuffer_close(fbDev);
fbDev = 0;
}
}
status_t FramebufferNativeWindow::setUpdateRectangle(const Rect& r)
{
if (!mUpdateOnDemand || !fbDev) {
return INVALID_OPERATION;
}
return fbDev->setUpdateRect(fbDev, r.left, r.top, r.width(), r.height());
}
status_t FramebufferNativeWindow::compositionComplete()
{
if (fbDev && 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 != NULL ? fb->setSwapInterval(fb, interval) : -EINVAL;
}
// only for debugging / logging
int FramebufferNativeWindow::getCurrentBufferIndex() const
{
Mutex::Autolock _l(mutex);
LOGE_IF(!grDev, "[RACE] FramebufferNativeWindow::getCurrentBufferIndex");
const int index = mCurrentBufferIndex;
return index;
}
int FramebufferNativeWindow::dequeueBuffer(ANativeWindow* window,
android_native_buffer_t** buffer)
{
FramebufferNativeWindow* self = getSelf(window);
framebuffer_device_t* fb;
{
Mutex::Autolock _l(self->mutex);
LOGE_IF(!self->grDev, "[RACE] FramebufferNativeWindow::dequeueBuffer");
fb = self->fbDev;
if (!fb)
return NO_INIT;
}
int index = self->mBufferHead;
GraphicLog& logger(GraphicLog::getInstance());
logger.log(GraphicLog::SF_FB_DEQUEUE_BEFORE, index);
#ifdef ENABLE_GRALLOC_NUMFB
/* This function is supposed to check whether there is atleast
one free buffer available.
fb->dequeueBuffer will check for the BufferHead being
available, which needs to be checked explicitly for
more than 2 buffer case, because in that case, fb_post
is not going to wait for BufferHead to be available, it will
wait just for the next buffer to be available.
For 2 framebuffers, there will always
be at least one buffer free. BufferHead being available
is already being checked in lockBuffer function.
*/
if (fb->numFramebuffers > 2) {
fb->dequeueBuffer(fb, index);
}
#endif
/* The buffer is available, return it */
Mutex::Autolock _l(self->mutex);
self->mBufferHead++;
if (self->mBufferHead >= self->mNumBuffers)
self->mBufferHead = 0;
// 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,
android_native_buffer_t* buffer)
{
FramebufferNativeWindow* self = getSelf(window);
Mutex::Autolock _l(self->mutex);
LOGE_IF(!self->grDev, "[RACE] FramebufferNativeWindow::lockBuffer");
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,
android_native_buffer_t* buffer)
{
FramebufferNativeWindow* self = getSelf(window);
Mutex::Autolock _l(self->mutex);
LOGE_IF(!self->grDev, "[RACE] FramebufferNativeWindow::queueBuffer");
framebuffer_device_t* fb = self->fbDev;
if (!fb)
return NO_INIT;
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(ANativeWindow* window,
int what, int* value)
{
FramebufferNativeWindow* self = getSelf(window);
Mutex::Autolock _l(self->mutex);
LOGE_IF(!self->grDev, "[RACE] FramebufferNativeWindow::query");
framebuffer_device_t* fb = self->fbDev;
if (fb) {
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;
}
}
*value = 0;
return BAD_VALUE;
}
int FramebufferNativeWindow::perform(ANativeWindow* window,
int operation, ...)
{
switch (operation) {
case NATIVE_WINDOW_SET_USAGE:
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;
}
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