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author | Teng-Hui Zhu <ztenghui@google.com> | 2011-08-01 11:32:58 -0700 |
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committer | Teng-Hui Zhu <ztenghui@google.com> | 2011-08-02 17:48:21 -0700 |
commit | 7c554a61cb935660cdc86905d040c781b490150f (patch) | |
tree | 033ba7f31eb01931dd94eb37cff5e014faf79bc3 /Source/WebCore/platform/graphics/android/TransferQueue.cpp | |
parent | d4f990572c3485cdc15cff48c3bedc6e7cad809b (diff) | |
download | external_webkit-7c554a61cb935660cdc86905d040c781b490150f.zip external_webkit-7c554a61cb935660cdc86905d040c781b490150f.tar.gz external_webkit-7c554a61cb935660cdc86905d040c781b490150f.tar.bz2 |
Shared surface texture
Instead of assigning each tile a Surface Texture, now just a normal GL texture.
The content from skia bitmap will first drawn into a queue of Surface Textures,
at draw time, blit them into each tile's GL texture.
Added extra lock to protect the queue operation and Surface Texture operation.
bug:5044597
Change-Id: I25f46228b93a3e99526daf52d8bd0d8d8fcc2879
Diffstat (limited to 'Source/WebCore/platform/graphics/android/TransferQueue.cpp')
-rw-r--r-- | Source/WebCore/platform/graphics/android/TransferQueue.cpp | 403 |
1 files changed, 403 insertions, 0 deletions
diff --git a/Source/WebCore/platform/graphics/android/TransferQueue.cpp b/Source/WebCore/platform/graphics/android/TransferQueue.cpp new file mode 100644 index 0000000..878affb --- /dev/null +++ b/Source/WebCore/platform/graphics/android/TransferQueue.cpp @@ -0,0 +1,403 @@ +/* + * Copyright 2011, The Android Open Source Project + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "config.h" +#include "TransferQueue.h" + +#if USE(ACCELERATED_COMPOSITING) + +#include "BaseTile.h" +#include "PaintedSurface.h" +#include <android/native_window.h> +#include <gui/SurfaceTexture.h> +#include <gui/SurfaceTextureClient.h> + +#ifdef DEBUG +#include <cutils/log.h> +#include <wtf/text/CString.h> + +#undef XLOG +#define XLOG(...) android_printLog(ANDROID_LOG_DEBUG, "TransferQueue", __VA_ARGS__) + +#else + +#undef XLOG +#define XLOG(...) + +#endif // DEBUG + +#define ST_BUFFER_NUMBER 4 + +namespace WebCore { + +TransferQueue::TransferQueue() + : m_currentRemovingPaint(0) + , m_transferQueueIndex(0) + , m_fboID(0) + , m_sharedSurfaceTextureId(0) + , m_hasGLContext(true) +{ + memset(&m_GLStateBeforeBlit, 0, sizeof(m_GLStateBeforeBlit)); + + m_transferQueueItemLocks = new android::Mutex[ST_BUFFER_NUMBER]; + + m_transferQueue = new TileTransferData[ST_BUFFER_NUMBER]; + for (int i = 0; i < ST_BUFFER_NUMBER; i++) { + m_transferQueue[i].savedBaseTilePtr = 0; + m_transferQueue[i].status = emptyItem; + } +} + +TransferQueue::~TransferQueue() +{ + glDeleteFramebuffers(1, &m_fboID); + m_fboID = 0; + glDeleteTextures(1, &m_sharedSurfaceTextureId); + m_sharedSurfaceTextureId = 0; + + delete[] m_transferQueueItemLocks; + delete[] m_transferQueue; +} + +int TransferQueue::size() +{ + return ST_BUFFER_NUMBER; +} + +void TransferQueue::initSharedSurfaceTextures(int width, int height) +{ + if (!m_sharedSurfaceTextureId) { + glGenTextures(1, &m_sharedSurfaceTextureId); + m_sharedSurfaceTexture = + new android::SurfaceTexture(m_sharedSurfaceTextureId); + m_ANW = new android::SurfaceTextureClient(m_sharedSurfaceTexture); + m_sharedSurfaceTexture->setSynchronousMode(true); + m_sharedSurfaceTexture->setBufferCount(ST_BUFFER_NUMBER+1); + + int result = native_window_set_buffers_geometry(m_ANW.get(), + width, height, HAL_PIXEL_FORMAT_RGBA_8888); + GLUtils::checkSurfaceTextureError("native_window_set_buffers_geometry", result); + result = native_window_set_usage(m_ANW.get(), + GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN); + GLUtils::checkSurfaceTextureError("native_window_set_usage", result); + } + + if (!m_fboID) + glGenFramebuffers(1, &m_fboID); +} + +// When bliting, if the item from the transfer queue is mismatching b/t the +// BaseTile and the content, then the item is considered as obsolete, and +// the content is discarded. +bool TransferQueue::checkObsolete(int index) +{ + BaseTile* baseTilePtr = m_transferQueue[index].savedBaseTilePtr; + if (!baseTilePtr) { + XLOG("Invalid savedBaseTilePtr , such that the tile is obsolete"); + return true; + } + + BaseTileTexture* baseTileTexture = baseTilePtr->texture(); + if (!baseTileTexture) { + XLOG("Invalid baseTileTexture , such that the tile is obsolete"); + return true; + } + + const TextureTileInfo* tileInfo = &m_transferQueue[index].tileInfo; + + if (tileInfo->m_x != baseTilePtr->x() + || tileInfo->m_y != baseTilePtr->y() + || tileInfo->m_scale != baseTilePtr->scale() + || tileInfo->m_painter != baseTilePtr->painter()) { + XLOG("Mismatching x, y, scale or painter , such that the tile is obsolete"); + return true; + } + + return false; +} + +void TransferQueue::blitTileFromQueue(GLuint fboID, BaseTileTexture* destTex, GLuint srcTexId, GLenum srcTexTarget) +{ + // Then set up the FBO and copy the SurfTex content in. + glBindFramebuffer(GL_FRAMEBUFFER, fboID); + glFramebufferTexture2D(GL_FRAMEBUFFER, + GL_COLOR_ATTACHMENT0, + GL_TEXTURE_2D, + destTex->m_ownTextureId, + 0); + setGLStateForCopy(destTex->getSize().width(), + destTex->getSize().height()); + GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER); + if (status != GL_FRAMEBUFFER_COMPLETE) { + XLOG("Error: glCheckFramebufferStatus failed"); + glBindFramebuffer(GL_FRAMEBUFFER, 0); + return; + } + + // Use empty rect to set up the special matrix to draw. + SkRect rect = SkRect::MakeEmpty(); + TilesManager::instance()->shader()->drawQuad(rect, srcTexId, 1.0, + srcTexTarget); + + // Need to WAR a driver bug to add a sync point here + GLubyte readBackPixels[4]; + glReadPixels(0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, readBackPixels); + + // Clean up FBO setup. + glBindFramebuffer(GL_FRAMEBUFFER, 0); // rebind the standard FBO + GLUtils::checkGlError("copy the surface texture into the normal one"); +} + +bool TransferQueue::currentOpWaitingRemoval(const TileRenderInfo* renderInfo) +{ + if (m_currentRemovingPaint + && m_currentRemovingPaint == renderInfo->tilePainter) + return true; + return false; +} + +bool TransferQueue::lockForUpdate(int index, const TileRenderInfo* renderInfo) +{ + // Before dequeuing the buffer from Surface Texture, make sure this item + // has been consumed. We can't simply rely on dequeueBuffer, due to the + // UI thread may want to remove the current operation, so we have to add + // our own locking mechanism. + // For blocking case, the item's status should not be emptyItem. + while (m_transferQueueItemLocks[index].tryLock()) { + // If the current operation is on an resource which is going to be + // removed from UI thread, then early return. + if (currentOpWaitingRemoval(renderInfo)) { + XLOG("Quit bitmap update: operation is removed from UI thread!" + " x y %d %d", + renderInfo->x, renderInfo->y); + return false; + } + } + + // And if we have lost GL Context, then we can just early return here. + if (!getHasGLContext()) { + m_transferQueue[index].status = pendingDiscard; + m_transferQueueItemLocks[index].unlock(); + XLOG("Quit bitmap update: No GL Context! x y %d %d", + renderInfo->x, renderInfo->y); + return false; + } + + return true; +} + +bool TransferQueue::getHasGLContext() +{ + android::Mutex::Autolock lock(m_hasGLContextLock); + bool hasContext = m_hasGLContext; + return hasContext; +} + +void TransferQueue::setHasGLContext(bool hasContext) +{ + android::Mutex::Autolock lock(m_hasGLContextLock); + m_hasGLContext = hasContext; +} + +void TransferQueue::discardQueue() +{ + // Unblock the Tex Gen thread first before Tile Page deletion. + // Otherwise, there will be a deadlock while removing operations. + setHasGLContext(false); + + for (int i = 0 ; i < ST_BUFFER_NUMBER; i++) { + m_transferQueue[i].status = pendingDiscard; + m_transferQueueItemLocks[i].unlock(); + } +} + +// Call on UI thread to copy from the shared Surface Texture to the BaseTile's texture. +void TransferQueue::updateDirtyBaseTiles() +{ + bool unlockFlag[ST_BUFFER_NUMBER]; + memset(unlockFlag, 0, sizeof(unlockFlag)); + + saveGLState(); + m_transferQueueLock.lock(); + + cleanupTransportQueue(); + if (!getHasGLContext()) + setHasGLContext(true); + + // Start from the oldest item, we call the updateTexImage to retrive + // the texture and blit that into each BaseTile's texture. + const int nextItemIndex = getNextTransferQueueIndex(); + int index = nextItemIndex; + for (int k = 0; k < ST_BUFFER_NUMBER ; k++) { + if (m_transferQueue[index].status == pendingBlit) { + bool obsoleteBaseTile = checkObsolete(index); + // Save the needed info, update the Surf Tex, clean up the item in + // the queue. Then either move on to next item or copy the content. + BaseTileTexture* destTexture = 0; + if (!obsoleteBaseTile) + destTexture = m_transferQueue[index].savedBaseTilePtr->texture(); + + m_sharedSurfaceTexture->updateTexImage(); + + unlockFlag[index] = true; + m_transferQueue[index].savedBaseTilePtr = 0; + m_transferQueue[index].status = emptyItem; + if (obsoleteBaseTile) { + XLOG("Warning: the texture is obsolete for this baseTile"); + continue; + } + + blitTileFromQueue(m_fboID, destTexture, + m_sharedSurfaceTextureId, + m_sharedSurfaceTexture->getCurrentTextureTarget()); + + // After the base tile copied into the GL texture, we need to + // update the texture's info such that at draw time, readyFor + // will find the latest texture's info + // We don't need a map any more, each texture contains its own + // texturesTileInfo. + destTexture->setOwnTextureTileInfoFromQueue(&m_transferQueue[index].tileInfo); + + XLOG("Blit tile x, y %d %d to destTexture->m_ownTextureId %d", + m_transferQueue[index].tileInfo.m_x, + m_transferQueue[index].tileInfo.m_y, + destTexture->m_ownTextureId); + } + index = (index + 1) % ST_BUFFER_NUMBER; + } + + restoreGLState(); + + int unlockIndex = nextItemIndex; + for (int k = 0; k < ST_BUFFER_NUMBER; k++) { + // Check the same order as the updateTexImage. + if (unlockFlag[unlockIndex]) + m_transferQueueItemLocks[unlockIndex].unlock(); + unlockIndex = (unlockIndex + 1) % ST_BUFFER_NUMBER; + } + + m_transferQueueLock.unlock(); +} + +// Note that there should be lock/unlock around this function call. +// Currently only called by GLUtils::updateSharedSurfaceTextureWithBitmap. +void TransferQueue::addItemInTransferQueue(const TileRenderInfo* renderInfo, + int index) +{ + m_transferQueueIndex = index; + + if (m_transferQueue[index].savedBaseTilePtr + || m_transferQueue[index].status != emptyItem) { + XLOG("ERROR update a tile which is dirty already @ index %d", index); + } + + m_transferQueue[index].savedBaseTilePtr = renderInfo->baseTile; + m_transferQueue[index].status = pendingBlit; + + // Now fill the tileInfo. + TextureTileInfo* textureInfo = &m_transferQueue[index].tileInfo; + + textureInfo->m_x = renderInfo->x; + textureInfo->m_y = renderInfo->y; + textureInfo->m_scale = renderInfo->scale; + textureInfo->m_painter = renderInfo->tilePainter; + + textureInfo->m_picture = renderInfo->textureInfo->m_pictureCount; +} + +// Note: this need to be called within th m_transferQueueLock. +void TransferQueue::cleanupTransportQueue() +{ + // We should call updateTexImage to the items first, + // then unlock. And we should start from the next item. + const int nextItemIndex = getNextTransferQueueIndex(); + bool needUnlock[ST_BUFFER_NUMBER]; + int index = nextItemIndex; + + for (int i = 0 ; i < ST_BUFFER_NUMBER; i++) { + needUnlock[index] = false; + if (m_transferQueue[index].status == pendingDiscard) { + m_sharedSurfaceTexture->updateTexImage(); + + m_transferQueue[index].savedBaseTilePtr = 0; + m_transferQueue[index].status == emptyItem; + needUnlock[index] = true; + } + index = (index + 1) % ST_BUFFER_NUMBER; + } + index = nextItemIndex; + for (int i = 0 ; i < ST_BUFFER_NUMBER; i++) { + if (needUnlock[index]) + m_transferQueueItemLocks[index].unlock(); + index = (index + 1) % ST_BUFFER_NUMBER; + } +} + +void TransferQueue::saveGLState() +{ + glGetIntegerv(GL_VIEWPORT, m_GLStateBeforeBlit.viewport); + glGetBooleanv(GL_SCISSOR_TEST, m_GLStateBeforeBlit.scissor); + glGetBooleanv(GL_DEPTH_TEST, m_GLStateBeforeBlit.depth); + glGetFloatv(GL_COLOR_CLEAR_VALUE, m_GLStateBeforeBlit.clearColor); +} + +void TransferQueue::setGLStateForCopy(int width, int height) +{ + // Need to match the texture size. + glViewport(0, 0, width, height); + glDisable(GL_SCISSOR_TEST); + glDisable(GL_DEPTH_TEST); + + glClearColor(0, 0, 0, 0); + glClear(GL_COLOR_BUFFER_BIT); +} + +void TransferQueue::restoreGLState() +{ + glViewport(m_GLStateBeforeBlit.viewport[0], + m_GLStateBeforeBlit.viewport[1], + m_GLStateBeforeBlit.viewport[2], + m_GLStateBeforeBlit.viewport[3]); + + if (m_GLStateBeforeBlit.scissor[0]) + glEnable(GL_SCISSOR_TEST); + + if (m_GLStateBeforeBlit.depth) + glEnable(GL_DEPTH_TEST); + + glClearColor(m_GLStateBeforeBlit.clearColor[0], + m_GLStateBeforeBlit.clearColor[1], + m_GLStateBeforeBlit.clearColor[2], + m_GLStateBeforeBlit.clearColor[3]); +} + +int TransferQueue::getNextTransferQueueIndex() +{ + return (m_transferQueueIndex + 1) % ST_BUFFER_NUMBER; +} + +} // namespace WebCore + +#endif // USE(ACCELERATED_COMPOSITING |