libs/ui/FramebufferNativeWindow.cpp - platform/frameworks/base - Git at Google

 /*
 **
 ** 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 <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)
             return;

         mUpdateOnDemand = (fbDev->setUpdateRect != 0);

         // initialize the buffer FIFO
         mNumBuffers = 2;
         mNumFreeBuffers = 2;
         mBufferHead = mNumBuffers-1;
         buffers[0] = new NativeBuffer(
                 fbDev->width, fbDev->height, fbDev->format, GRALLOC_USAGE_HW_FB);
         buffers[1] = 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[0]->handle, &buffers[0]->stride);

         LOGE_IF(err, "fb buffer 0 allocation failed w=%d, h=%d, err=%s",
                 fbDev->width, fbDev->height, strerror(-err));

         err = grDev->alloc(grDev,
                 fbDev->width, fbDev->height, fbDev->format,
                 GRALLOC_USAGE_HW_FB, &buffers[1]->handle, &buffers[1]->stride);

         LOGE_IF(err, "fb buffer 1 allocation failed w=%d, h=%d, err=%s",
                 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::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);
 }

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

     // wait for a free buffer
     while (!self->mNumFreeBuffers) {
         self->mCondition.wait(self->mutex);
     }
     // get this buffer
     self->mNumFreeBuffers--;
     int index = self->mBufferHead++;
     if (self->mBufferHead >= self->mNumBuffers)
         self->mBufferHead = 0;

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

     return 0;
 }

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

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

     return NO_ERROR;
 }

 int FramebufferNativeWindow::queueBuffer(ANativeWindow* window,
         android_native_buffer_t* 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;
     int res = fb->post(fb, handle);
     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);
     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;
     }
     *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;
 }
	/*
	**
	** 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 <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)
	return;

	mUpdateOnDemand = (fbDev->setUpdateRect != 0);

	// initialize the buffer FIFO
	mNumBuffers = 2;
	mNumFreeBuffers = 2;
	mBufferHead = mNumBuffers-1;
	buffers[0] = new NativeBuffer(
	fbDev->width, fbDev->height, fbDev->format, GRALLOC_USAGE_HW_FB);
	buffers[1] = 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[0]->handle, &buffers[0]->stride);

	LOGE_IF(err, "fb buffer 0 allocation failed w=%d, h=%d, err=%s",
	fbDev->width, fbDev->height, strerror(-err));

	err = grDev->alloc(grDev,
	fbDev->width, fbDev->height, fbDev->format,
	GRALLOC_USAGE_HW_FB, &buffers[1]->handle, &buffers[1]->stride);

	LOGE_IF(err, "fb buffer 1 allocation failed w=%d, h=%d, err=%s",
	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::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);
	}

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

	// wait for a free buffer
	while (!self->mNumFreeBuffers) {
	self->mCondition.wait(self->mutex);
	}
	// get this buffer
	self->mNumFreeBuffers--;
	int index = self->mBufferHead++;
	if (self->mBufferHead >= self->mNumBuffers)
	self->mBufferHead = 0;

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

	return 0;
	}

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

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

	return NO_ERROR;
	}

	int FramebufferNativeWindow::queueBuffer(ANativeWindow* window,
	android_native_buffer_t* 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;
	int res = fb->post(fb, handle);
	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);
	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;
	}
	*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;
	}