9ec430adae
A window is created and the browser is about to render into it the very first time, at that point it does an IPC to SF to request a new buffer. Meanwhile, the window manager removes that window from the list and the shared memory block it uses is marked as invalid. However, at that point, another window is created and is given the same index (that just go freed), but a different identity and resets the "invalid" bit in the shared block. When we go back to the buffer allocation code, we're stuck because the surface we're allocating for is gone and we don't detect it's invalid because the invalid bit has been reset. It is not sufficient to check for the invalid bit, I should also check that identities match.
530 lines
18 KiB
C++
530 lines
18 KiB
C++
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdlib.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <cutils/properties.h>
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#include <cutils/native_handle.h>
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#include <utils/Errors.h>
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#include <utils/Log.h>
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#include <utils/StopWatch.h>
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#include <ui/GraphicBuffer.h>
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#include <ui/PixelFormat.h>
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#include <ui/Surface.h>
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#include "clz.h"
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#include "Layer.h"
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#include "SurfaceFlinger.h"
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#include "DisplayHardware/DisplayHardware.h"
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#define DEBUG_RESIZE 0
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namespace android {
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// ---------------------------------------------------------------------------
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const uint32_t Layer::typeInfo = LayerBaseClient::typeInfo | 4;
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const char* const Layer::typeID = "Layer";
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// ---------------------------------------------------------------------------
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Layer::Layer(SurfaceFlinger* flinger, DisplayID display,
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const sp<Client>& c, int32_t i)
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: LayerBaseClient(flinger, display, c, i),
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mSecure(false),
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mNoEGLImageForSwBuffers(false),
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mNeedsBlending(true),
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mNeedsDithering(false)
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{
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// no OpenGL operation is possible here, since we might not be
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// in the OpenGL thread.
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mFrontBufferIndex = lcblk->getFrontBuffer();
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}
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Layer::~Layer()
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{
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destroy();
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// the actual buffers will be destroyed here
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}
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void Layer::destroy()
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{
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for (size_t i=0 ; i<NUM_BUFFERS ; i++) {
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if (mTextures[i].name != -1U) {
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glDeleteTextures(1, &mTextures[i].name);
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mTextures[i].name = -1U;
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}
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if (mTextures[i].image != EGL_NO_IMAGE_KHR) {
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EGLDisplay dpy(mFlinger->graphicPlane(0).getEGLDisplay());
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eglDestroyImageKHR(dpy, mTextures[i].image);
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mTextures[i].image = EGL_NO_IMAGE_KHR;
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}
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Mutex::Autolock _l(mLock);
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mBuffers[i].clear();
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mWidth = mHeight = 0;
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}
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mSurface.clear();
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}
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sp<LayerBaseClient::Surface> Layer::createSurface() const
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{
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return mSurface;
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}
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status_t Layer::ditch()
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{
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// the layer is not on screen anymore. free as much resources as possible
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destroy();
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return NO_ERROR;
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}
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status_t Layer::setBuffers( uint32_t w, uint32_t h,
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PixelFormat format, uint32_t flags)
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{
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// this surfaces pixel format
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PixelFormatInfo info;
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status_t err = getPixelFormatInfo(format, &info);
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if (err) return err;
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// the display's pixel format
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const DisplayHardware& hw(graphicPlane(0).displayHardware());
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PixelFormatInfo displayInfo;
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getPixelFormatInfo(hw.getFormat(), &displayInfo);
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const uint32_t hwFlags = hw.getFlags();
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mFormat = format;
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mWidth = w;
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mHeight = h;
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mSecure = (flags & ISurfaceComposer::eSecure) ? true : false;
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mNeedsBlending = (info.h_alpha - info.l_alpha) > 0;
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mNoEGLImageForSwBuffers = !(hwFlags & DisplayHardware::CACHED_BUFFERS);
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// we use the red index
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int displayRedSize = displayInfo.getSize(PixelFormatInfo::INDEX_RED);
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int layerRedsize = info.getSize(PixelFormatInfo::INDEX_RED);
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mNeedsDithering = layerRedsize > displayRedSize;
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for (size_t i=0 ; i<NUM_BUFFERS ; i++) {
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mBuffers[i] = new GraphicBuffer();
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}
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mSurface = new SurfaceLayer(mFlinger, clientIndex(), this);
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return NO_ERROR;
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}
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void Layer::reloadTexture(const Region& dirty)
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{
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Mutex::Autolock _l(mLock);
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sp<GraphicBuffer> buffer(getFrontBufferLocked());
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if (LIKELY((mFlags & DisplayHardware::DIRECT_TEXTURE) &&
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(buffer->usage & GRALLOC_USAGE_HW_TEXTURE))) {
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int index = mFrontBufferIndex;
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if (LIKELY(!mTextures[index].dirty)) {
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glBindTexture(GL_TEXTURE_2D, mTextures[index].name);
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} else {
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// we need to recreate the texture
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EGLDisplay dpy(mFlinger->graphicPlane(0).getEGLDisplay());
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// create the new texture name if needed
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if (UNLIKELY(mTextures[index].name == -1U)) {
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mTextures[index].name = createTexture();
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} else {
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glBindTexture(GL_TEXTURE_2D, mTextures[index].name);
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}
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// free the previous image
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if (mTextures[index].image != EGL_NO_IMAGE_KHR) {
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eglDestroyImageKHR(dpy, mTextures[index].image);
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mTextures[index].image = EGL_NO_IMAGE_KHR;
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}
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// construct an EGL_NATIVE_BUFFER_ANDROID
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android_native_buffer_t* clientBuf = buffer->getNativeBuffer();
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// create the new EGLImageKHR
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const EGLint attrs[] = {
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EGL_IMAGE_PRESERVED_KHR, EGL_TRUE,
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EGL_NONE, EGL_NONE
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};
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mTextures[index].image = eglCreateImageKHR(
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dpy, EGL_NO_CONTEXT, EGL_NATIVE_BUFFER_ANDROID,
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(EGLClientBuffer)clientBuf, attrs);
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LOGE_IF(mTextures[index].image == EGL_NO_IMAGE_KHR,
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"eglCreateImageKHR() failed. err=0x%4x",
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eglGetError());
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if (mTextures[index].image != EGL_NO_IMAGE_KHR) {
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glEGLImageTargetTexture2DOES(GL_TEXTURE_2D,
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(GLeglImageOES)mTextures[index].image);
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GLint error = glGetError();
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if (UNLIKELY(error != GL_NO_ERROR)) {
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// this failed, for instance, because we don't support
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// NPOT.
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// FIXME: do something!
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LOGD("layer=%p, glEGLImageTargetTexture2DOES(%p) "
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"failed err=0x%04x",
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this, mTextures[index].image, error);
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mFlags &= ~DisplayHardware::DIRECT_TEXTURE;
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} else {
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// Everything went okay!
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mTextures[index].NPOTAdjust = false;
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mTextures[index].dirty = false;
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mTextures[index].width = clientBuf->width;
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mTextures[index].height = clientBuf->height;
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}
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}
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}
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} else {
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for (size_t i=0 ; i<NUM_BUFFERS ; i++)
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mTextures[i].image = EGL_NO_IMAGE_KHR;
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GGLSurface t;
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status_t res = buffer->lock(&t, GRALLOC_USAGE_SW_READ_OFTEN);
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LOGE_IF(res, "error %d (%s) locking buffer %p",
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res, strerror(res), buffer.get());
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if (res == NO_ERROR) {
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if (UNLIKELY(mTextures[0].name == -1U)) {
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mTextures[0].name = createTexture();
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mTextures[0].width = 0;
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mTextures[0].height = 0;
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}
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loadTexture(&mTextures[0], dirty, t);
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buffer->unlock();
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}
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}
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}
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void Layer::onDraw(const Region& clip) const
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{
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int index = mFrontBufferIndex;
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if (mTextures[index].image == EGL_NO_IMAGE_KHR)
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index = 0;
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GLuint textureName = mTextures[index].name;
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if (UNLIKELY(textureName == -1LU)) {
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// the texture has not been created yet, this Layer has
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// in fact never been drawn into. this happens frequently with
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// SurfaceView.
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clearWithOpenGL(clip);
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return;
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}
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drawWithOpenGL(clip, mTextures[index]);
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}
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sp<GraphicBuffer> Layer::requestBuffer(int index, int usage)
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{
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sp<GraphicBuffer> buffer;
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// this ensures our client doesn't go away while we're accessing
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// the shared area.
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sp<Client> ourClient(client.promote());
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if (ourClient == 0) {
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// oops, the client is already gone
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return buffer;
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}
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/*
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* This is called from the client's Surface::dequeue(). This can happen
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* at any time, especially while we're in the middle of using the
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* buffer 'index' as our front buffer.
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*
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* Make sure the buffer we're resizing is not the front buffer and has been
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* dequeued. Once this condition is asserted, we are guaranteed that this
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* buffer cannot become the front buffer under our feet, since we're called
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* from Surface::dequeue()
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*/
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status_t err = lcblk->assertReallocate(index);
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LOGE_IF(err, "assertReallocate(%d) failed (%s)", index, strerror(-err));
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if (err != NO_ERROR) {
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// the surface may have died
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return buffer;
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}
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uint32_t w, h;
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{ // scope for the lock
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Mutex::Autolock _l(mLock);
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w = mWidth;
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h = mHeight;
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buffer = mBuffers[index];
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// destroy() could have been called before we get here, we log it
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// because it's uncommon, and the code below should handle it
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LOGW_IF(buffer==0,
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"mBuffers[%d] is null (mWidth=%d, mHeight=%d)",
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index, w, h);
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mBuffers[index].clear();
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}
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const uint32_t effectiveUsage = getEffectiveUsage(usage);
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if (buffer!=0 && buffer->getStrongCount() == 1) {
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err = buffer->reallocate(w, h, mFormat, effectiveUsage);
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} else {
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// here we have to reallocate a new buffer because we could have a
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// client in our process with a reference to it (eg: status bar),
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// and we can't release the handle under its feet.
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buffer.clear();
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buffer = new GraphicBuffer(w, h, mFormat, effectiveUsage);
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err = buffer->initCheck();
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}
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if (err || buffer->handle == 0) {
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LOGE_IF(err || buffer->handle == 0,
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"Layer::requestBuffer(this=%p), index=%d, w=%d, h=%d failed (%s)",
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this, index, w, h, strerror(-err));
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} else {
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LOGD_IF(DEBUG_RESIZE,
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"Layer::requestBuffer(this=%p), index=%d, w=%d, h=%d, handle=%p",
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this, index, w, h, buffer->handle);
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}
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if (err == NO_ERROR && buffer->handle != 0) {
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Mutex::Autolock _l(mLock);
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if (mWidth && mHeight) {
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// and we have new buffer
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mBuffers[index] = buffer;
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// texture is now dirty...
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mTextures[index].dirty = true;
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} else {
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// oops we got killed while we were allocating the buffer
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buffer.clear();
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}
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}
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return buffer;
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}
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uint32_t Layer::getEffectiveUsage(uint32_t usage) const
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{
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/*
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* buffers used for software rendering, but h/w composition
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* are allocated with SW_READ_OFTEN | SW_WRITE_OFTEN | HW_TEXTURE
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*
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* buffers used for h/w rendering and h/w composition
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* are allocated with HW_RENDER | HW_TEXTURE
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*
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* buffers used with h/w rendering and either NPOT or no egl_image_ext
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* are allocated with SW_READ_RARELY | HW_RENDER
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*
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*/
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if (mSecure) {
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// secure buffer, don't store it into the GPU
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usage = GraphicBuffer::USAGE_SW_READ_OFTEN |
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GraphicBuffer::USAGE_SW_WRITE_OFTEN;
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} else {
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// it's allowed to modify the usage flags here, but generally
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// the requested flags should be honored.
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if (mNoEGLImageForSwBuffers) {
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if (usage & GraphicBuffer::USAGE_HW_MASK) {
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// request EGLImage for h/w buffers only
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usage |= GraphicBuffer::USAGE_HW_TEXTURE;
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}
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} else {
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// request EGLImage for all buffers
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usage |= GraphicBuffer::USAGE_HW_TEXTURE;
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}
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}
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return usage;
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}
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uint32_t Layer::doTransaction(uint32_t flags)
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{
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const Layer::State& front(drawingState());
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const Layer::State& temp(currentState());
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if ((front.requested_w != temp.requested_w) ||
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(front.requested_h != temp.requested_h)) {
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// the size changed, we need to ask our client to request a new buffer
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LOGD_IF(DEBUG_RESIZE,
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"resize (layer=%p), requested (%dx%d), "
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"drawing (%d,%d), (%dx%d), (%dx%d)",
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this,
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int(temp.requested_w), int(temp.requested_h),
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int(front.requested_w), int(front.requested_h),
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int(mBuffers[0]->getWidth()), int(mBuffers[0]->getHeight()),
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int(mBuffers[1]->getWidth()), int(mBuffers[1]->getHeight()));
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// we're being resized and there is a freeze display request,
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// acquire a freeze lock, so that the screen stays put
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// until we've redrawn at the new size; this is to avoid
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// glitches upon orientation changes.
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if (mFlinger->hasFreezeRequest()) {
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// if the surface is hidden, don't try to acquire the
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// freeze lock, since hidden surfaces may never redraw
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if (!(front.flags & ISurfaceComposer::eLayerHidden)) {
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mFreezeLock = mFlinger->getFreezeLock();
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}
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}
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// this will make sure LayerBase::doTransaction doesn't update
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// the drawing state's size
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Layer::State& editDraw(mDrawingState);
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editDraw.requested_w = temp.requested_w;
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editDraw.requested_h = temp.requested_h;
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// record the new size, form this point on, when the client request a
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// buffer, it'll get the new size.
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setDrawingSize(temp.requested_w, temp.requested_h);
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// all buffers need reallocation
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lcblk->reallocate();
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}
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if (temp.sequence != front.sequence) {
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if (temp.flags & ISurfaceComposer::eLayerHidden || temp.alpha == 0) {
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// this surface is now hidden, so it shouldn't hold a freeze lock
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// (it may never redraw, which is fine if it is hidden)
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mFreezeLock.clear();
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}
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}
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return LayerBase::doTransaction(flags);
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}
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void Layer::setDrawingSize(uint32_t w, uint32_t h) {
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Mutex::Autolock _l(mLock);
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mWidth = w;
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mHeight = h;
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}
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// ----------------------------------------------------------------------------
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// pageflip handling...
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// ----------------------------------------------------------------------------
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void Layer::lockPageFlip(bool& recomputeVisibleRegions)
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{
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ssize_t buf = lcblk->retireAndLock();
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if (buf < NO_ERROR) {
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//LOGW("nothing to retire (%s)", strerror(-buf));
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// NOTE: here the buffer is locked because we will used
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// for composition later in the loop
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return;
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}
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// we retired a buffer, which becomes the new front buffer
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mFrontBufferIndex = buf;
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// get the dirty region
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sp<GraphicBuffer> newFrontBuffer(getBuffer(buf));
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const Region dirty(lcblk->getDirtyRegion(buf));
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mPostedDirtyRegion = dirty.intersect( newFrontBuffer->getBounds() );
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const Layer::State& front(drawingState());
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if (newFrontBuffer->getWidth() == front.requested_w &&
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newFrontBuffer->getHeight() == front.requested_h)
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{
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if ((front.w != front.requested_w) ||
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(front.h != front.requested_h))
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{
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// Here we pretend the transaction happened by updating the
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// current and drawing states. Drawing state is only accessed
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// in this thread, no need to have it locked
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Layer::State& editDraw(mDrawingState);
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editDraw.w = editDraw.requested_w;
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editDraw.h = editDraw.requested_h;
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// We also need to update the current state so that we don't
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// end-up doing too much work during the next transaction.
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// NOTE: We actually don't need hold the transaction lock here
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// because State::w and State::h are only accessed from
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// this thread
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Layer::State& editTemp(currentState());
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editTemp.w = editDraw.w;
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editTemp.h = editDraw.h;
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// recompute visible region
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recomputeVisibleRegions = true;
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// we now have the correct size, unfreeze the screen
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mFreezeLock.clear();
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}
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}
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// FIXME: signal an event if we have more buffers waiting
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// mFlinger->signalEvent();
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if (!mPostedDirtyRegion.isEmpty()) {
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reloadTexture( mPostedDirtyRegion );
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}
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}
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void Layer::unlockPageFlip(
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const Transform& planeTransform, Region& outDirtyRegion)
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{
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Region dirtyRegion(mPostedDirtyRegion);
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if (!dirtyRegion.isEmpty()) {
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mPostedDirtyRegion.clear();
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// The dirty region is given in the layer's coordinate space
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// transform the dirty region by the surface's transformation
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// and the global transformation.
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const Layer::State& s(drawingState());
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const Transform tr(planeTransform * s.transform);
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dirtyRegion = tr.transform(dirtyRegion);
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// At this point, the dirty region is in screen space.
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// Make sure it's constrained by the visible region (which
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// is in screen space as well).
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dirtyRegion.andSelf(visibleRegionScreen);
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outDirtyRegion.orSelf(dirtyRegion);
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}
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}
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void Layer::finishPageFlip()
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{
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status_t err = lcblk->unlock( mFrontBufferIndex );
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LOGE_IF(err!=NO_ERROR,
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"layer %p, buffer=%d wasn't locked!",
|
|
this, mFrontBufferIndex);
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
Layer::SurfaceLayer::SurfaceLayer(const sp<SurfaceFlinger>& flinger,
|
|
SurfaceID id, const sp<Layer>& owner)
|
|
: Surface(flinger, id, owner->getIdentity(), owner)
|
|
{
|
|
}
|
|
|
|
Layer::SurfaceLayer::~SurfaceLayer()
|
|
{
|
|
}
|
|
|
|
sp<GraphicBuffer> Layer::SurfaceLayer::requestBuffer(int index, int usage)
|
|
{
|
|
sp<GraphicBuffer> buffer;
|
|
sp<Layer> owner(getOwner());
|
|
if (owner != 0) {
|
|
LOGE_IF(uint32_t(index)>=NUM_BUFFERS,
|
|
"getBuffer() index (%d) out of range", index);
|
|
if (uint32_t(index) < NUM_BUFFERS) {
|
|
buffer = owner->requestBuffer(index, usage);
|
|
}
|
|
}
|
|
return buffer;
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
|
|
}; // namespace android
|