235c424c9a
This change fixes a bug that allowed the most recently queued buffer to be returned by dequeueBuffer. At the next updateTexImage call, the dequeued buffer would be set as the contents of the texture even though the client could be writing to it. Change-Id: I53dc14eed13262475627d5551337df57fd78fe00
329 lines
10 KiB
C++
329 lines
10 KiB
C++
/*
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* Copyright (C) 2010 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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#define LOG_TAG "SurfaceTexture"
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//#define LOG_NDEBUG 0
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#define GL_GLEXT_PROTOTYPES
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#define EGL_EGLEXT_PROTOTYPES
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include <GLES2/gl2.h>
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#include <GLES2/gl2ext.h>
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#include <gui/SurfaceTexture.h>
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#include <surfaceflinger/ISurfaceComposer.h>
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#include <surfaceflinger/SurfaceComposerClient.h>
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#include <utils/Log.h>
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namespace android {
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// Transform matrices
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static float mtxIdentity[16] = {
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1, 0, 0, 0,
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0, 1, 0, 0,
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0, 0, 1, 0,
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0, 0, 0, 1,
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};
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static float mtxFlipH[16] = {
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-1, 0, 0, 0,
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0, 1, 0, 0,
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0, 0, 1, 0,
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1, 0, 0, 1,
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};
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static float mtxFlipV[16] = {
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1, 0, 0, 0,
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0, -1, 0, 0,
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0, 0, 1, 0,
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0, 1, 0, 1,
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};
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static float mtxRot90[16] = {
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0, 1, 0, 0,
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-1, 0, 0, 0,
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0, 0, 1, 0,
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1, 0, 0, 1,
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};
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static float mtxRot180[16] = {
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-1, 0, 0, 0,
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0, -1, 0, 0,
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0, 0, 1, 0,
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1, 1, 0, 1,
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};
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static float mtxRot270[16] = {
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0, -1, 0, 0,
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1, 0, 0, 0,
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0, 0, 1, 0,
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0, 1, 0, 1,
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};
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static void mtxMul(float out[16], const float a[16], const float b[16]);
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SurfaceTexture::SurfaceTexture(GLuint tex) :
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mBufferCount(MIN_BUFFER_SLOTS), mCurrentTexture(INVALID_BUFFER_SLOT),
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mLastQueued(INVALID_BUFFER_SLOT), mTexName(tex) {
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LOGV("SurfaceTexture::SurfaceTexture");
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for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
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mSlots[i].mEglImage = EGL_NO_IMAGE_KHR;
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mSlots[i].mEglDisplay = EGL_NO_DISPLAY;
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mSlots[i].mOwnedByClient = false;
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}
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}
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SurfaceTexture::~SurfaceTexture() {
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LOGV("SurfaceTexture::~SurfaceTexture");
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freeAllBuffers();
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}
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status_t SurfaceTexture::setBufferCount(int bufferCount) {
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LOGV("SurfaceTexture::setBufferCount");
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Mutex::Autolock lock(mMutex);
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freeAllBuffers();
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mBufferCount = bufferCount;
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mCurrentTexture = INVALID_BUFFER_SLOT;
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mLastQueued = INVALID_BUFFER_SLOT;
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return OK;
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}
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sp<GraphicBuffer> SurfaceTexture::requestBuffer(int buf,
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uint32_t w, uint32_t h, uint32_t format, uint32_t usage) {
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LOGV("SurfaceTexture::requestBuffer");
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Mutex::Autolock lock(mMutex);
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if (buf < 0 || mBufferCount <= buf) {
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LOGE("requestBuffer: slot index out of range [0, %d]: %d",
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mBufferCount, buf);
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return 0;
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}
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usage |= GraphicBuffer::USAGE_HW_TEXTURE;
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sp<ISurfaceComposer> composer(ComposerService::getComposerService());
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sp<GraphicBuffer> graphicBuffer(composer->createGraphicBuffer(w, h,
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format, usage));
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if (graphicBuffer == 0) {
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LOGE("requestBuffer: SurfaceComposer::createGraphicBuffer failed");
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} else {
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mSlots[buf].mGraphicBuffer = graphicBuffer;
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if (mSlots[buf].mEglImage != EGL_NO_IMAGE_KHR) {
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eglDestroyImageKHR(mSlots[buf].mEglDisplay, mSlots[buf].mEglImage);
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mSlots[buf].mEglImage = EGL_NO_IMAGE_KHR;
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mSlots[buf].mEglDisplay = EGL_NO_DISPLAY;
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}
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}
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return graphicBuffer;
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}
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status_t SurfaceTexture::dequeueBuffer(int *buf) {
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LOGV("SurfaceTexture::dequeueBuffer");
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Mutex::Autolock lock(mMutex);
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int found = INVALID_BUFFER_SLOT;
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for (int i = 0; i < mBufferCount; i++) {
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if (!mSlots[i].mOwnedByClient && i != mCurrentTexture && i != mLastQueued) {
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mSlots[i].mOwnedByClient = true;
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found = i;
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break;
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}
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}
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if (found == INVALID_BUFFER_SLOT) {
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return -EBUSY;
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}
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*buf = found;
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return OK;
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}
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status_t SurfaceTexture::queueBuffer(int buf) {
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LOGV("SurfaceTexture::queueBuffer");
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Mutex::Autolock lock(mMutex);
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if (buf < 0 || mBufferCount <= buf) {
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LOGE("queueBuffer: slot index out of range [0, %d]: %d",
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mBufferCount, buf);
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return -EINVAL;
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} else if (!mSlots[buf].mOwnedByClient) {
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LOGE("queueBuffer: slot %d is not owned by the client", buf);
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return -EINVAL;
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} else if (mSlots[buf].mGraphicBuffer == 0) {
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LOGE("queueBuffer: slot %d was enqueued without requesting a buffer",
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buf);
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return -EINVAL;
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}
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mSlots[buf].mOwnedByClient = false;
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mLastQueued = buf;
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mLastQueuedCrop = mNextCrop;
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mLastQueuedTransform = mNextTransform;
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return OK;
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}
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void SurfaceTexture::cancelBuffer(int buf) {
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LOGV("SurfaceTexture::cancelBuffer");
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Mutex::Autolock lock(mMutex);
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if (buf < 0 || mBufferCount <= buf) {
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LOGE("cancelBuffer: slot index out of range [0, %d]: %d", mBufferCount,
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buf);
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return;
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} else if (!mSlots[buf].mOwnedByClient) {
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LOGE("cancelBuffer: slot %d is not owned by the client", buf);
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return;
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}
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mSlots[buf].mOwnedByClient = false;
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}
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status_t SurfaceTexture::setCrop(const Rect& crop) {
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LOGV("SurfaceTexture::setCrop");
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Mutex::Autolock lock(mMutex);
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mNextCrop = crop;
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return OK;
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}
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status_t SurfaceTexture::setTransform(uint32_t transform) {
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LOGV("SurfaceTexture::setTransform");
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Mutex::Autolock lock(mMutex);
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mNextTransform = transform;
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return OK;
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}
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status_t SurfaceTexture::updateTexImage() {
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LOGV("SurfaceTexture::updateTexImage");
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Mutex::Autolock lock(mMutex);
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// We always bind the texture even if we don't update its contents.
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glBindTexture(GL_TEXTURE_EXTERNAL_OES, mTexName);
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// Initially both mCurrentTexture and mLastQueued are INVALID_BUFFER_SLOT,
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// so this check will fail until a buffer gets queued.
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if (mCurrentTexture != mLastQueued) {
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// Update the SurfaceTexture state.
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mCurrentTexture = mLastQueued;
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mCurrentCrop = mLastQueuedCrop;
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mCurrentTransform = mLastQueuedTransform;
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// Update the GL texture object.
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EGLImageKHR image = mSlots[mCurrentTexture].mEglImage;
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if (image == EGL_NO_IMAGE_KHR) {
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EGLDisplay dpy = eglGetCurrentDisplay();
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sp<GraphicBuffer> graphicBuffer = mSlots[mCurrentTexture].mGraphicBuffer;
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image = createImage(dpy, graphicBuffer);
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mSlots[mCurrentTexture].mEglImage = image;
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mSlots[mCurrentTexture].mEglDisplay = dpy;
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}
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glEGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, (GLeglImageOES)image);
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GLint error = glGetError();
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if (error != GL_NO_ERROR) {
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LOGE("error binding external texture image %p (slot %d): %#04x",
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image, mCurrentTexture, error);
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return -EINVAL;
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}
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}
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return OK;
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}
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void SurfaceTexture::getTransformMatrix(float mtx[16]) {
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LOGV("SurfaceTexture::updateTexImage");
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Mutex::Autolock lock(mMutex);
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float* xform = mtxIdentity;
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switch (mCurrentTransform) {
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case 0:
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xform = mtxIdentity;
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break;
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case NATIVE_WINDOW_TRANSFORM_FLIP_H:
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xform = mtxFlipH;
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break;
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case NATIVE_WINDOW_TRANSFORM_FLIP_V:
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xform = mtxFlipV;
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break;
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case NATIVE_WINDOW_TRANSFORM_ROT_90:
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xform = mtxRot90;
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break;
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case NATIVE_WINDOW_TRANSFORM_ROT_180:
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xform = mtxRot180;
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break;
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case NATIVE_WINDOW_TRANSFORM_ROT_270:
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xform = mtxRot270;
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break;
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default:
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LOGE("getTransformMatrix: unknown transform: %d", mCurrentTransform);
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}
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sp<GraphicBuffer>& buf(mSlots[mCurrentTexture].mGraphicBuffer);
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float tx = float(mCurrentCrop.left) / float(buf->getWidth());
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float ty = float(mCurrentCrop.bottom) / float(buf->getHeight());
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float sx = float(mCurrentCrop.width()) / float(buf->getWidth());
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float sy = float(mCurrentCrop.height()) / float(buf->getHeight());
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float crop[16] = {
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sx, 0, 0, sx*tx,
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0, sy, 0, sy*ty,
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0, 0, 1, 0,
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0, 0, 0, 1,
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};
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mtxMul(mtx, crop, xform);
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}
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void SurfaceTexture::freeAllBuffers() {
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for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
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mSlots[i].mGraphicBuffer = 0;
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mSlots[i].mOwnedByClient = false;
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if (mSlots[i].mEglImage != EGL_NO_IMAGE_KHR) {
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eglDestroyImageKHR(mSlots[i].mEglDisplay, mSlots[i].mEglImage);
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mSlots[i].mEglImage = EGL_NO_IMAGE_KHR;
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mSlots[i].mEglDisplay = EGL_NO_DISPLAY;
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}
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}
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}
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EGLImageKHR SurfaceTexture::createImage(EGLDisplay dpy,
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const sp<GraphicBuffer>& graphicBuffer) {
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EGLClientBuffer cbuf = (EGLClientBuffer)graphicBuffer->getNativeBuffer();
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EGLint attrs[] = {
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EGL_IMAGE_PRESERVED_KHR, EGL_TRUE,
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EGL_NONE,
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};
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EGLImageKHR image = eglCreateImageKHR(dpy, EGL_NO_CONTEXT,
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EGL_NATIVE_BUFFER_ANDROID, cbuf, attrs);
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EGLint error = eglGetError();
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if (error != EGL_SUCCESS) {
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LOGE("error creating EGLImage: %#x", error);
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} else if (image == EGL_NO_IMAGE_KHR) {
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LOGE("no error reported, but no image was returned by "
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"eglCreateImageKHR");
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}
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return image;
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}
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static void mtxMul(float out[16], const float a[16], const float b[16]) {
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out[0] = a[0]*b[0] + a[4]*b[1] + a[8]*b[2] + a[12]*b[3];
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out[1] = a[1]*b[0] + a[5]*b[1] + a[9]*b[2] + a[13]*b[3];
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out[2] = a[2]*b[0] + a[6]*b[1] + a[10]*b[2] + a[14]*b[3];
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out[3] = a[3]*b[0] + a[7]*b[1] + a[11]*b[2] + a[15]*b[3];
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out[4] = a[0]*b[4] + a[4]*b[5] + a[8]*b[6] + a[12]*b[7];
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out[5] = a[1]*b[4] + a[5]*b[5] + a[9]*b[6] + a[13]*b[7];
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out[6] = a[2]*b[4] + a[6]*b[5] + a[10]*b[6] + a[14]*b[7];
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out[7] = a[3]*b[4] + a[7]*b[5] + a[11]*b[6] + a[15]*b[7];
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out[8] = a[0]*b[8] + a[4]*b[9] + a[8]*b[10] + a[12]*b[11];
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out[9] = a[1]*b[8] + a[5]*b[9] + a[9]*b[10] + a[13]*b[11];
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out[10] = a[2]*b[8] + a[6]*b[9] + a[10]*b[10] + a[14]*b[11];
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out[11] = a[3]*b[8] + a[7]*b[9] + a[11]*b[10] + a[15]*b[11];
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out[12] = a[0]*b[12] + a[4]*b[13] + a[8]*b[14] + a[12]*b[15];
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out[13] = a[1]*b[12] + a[5]*b[13] + a[9]*b[14] + a[13]*b[15];
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out[14] = a[2]*b[12] + a[6]*b[13] + a[10]*b[14] + a[14]*b[15];
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out[15] = a[3]*b[12] + a[7]*b[13] + a[11]*b[14] + a[15]*b[15];
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}
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}; // namespace android
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