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author | Steve Block <steveblock@google.com> | 2011-05-09 16:25:46 +0100 |
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committer | Steve Block <steveblock@google.com> | 2011-05-12 14:28:33 +0100 |
commit | 31dbc523d9ee6fd7d7e46c540b5f675eeb559ed7 (patch) | |
tree | 3e73099a4bf4c6849c6f448aa3aba9fe408998f8 /Source/WebCore/platform/graphics/android/TilesManager.cpp | |
parent | cad810f21b803229eb11403f9209855525a25d57 (diff) | |
download | external_webkit-31dbc523d9ee6fd7d7e46c540b5f675eeb559ed7.zip external_webkit-31dbc523d9ee6fd7d7e46c540b5f675eeb559ed7.tar.gz external_webkit-31dbc523d9ee6fd7d7e46c540b5f675eeb559ed7.tar.bz2 |
Merge WebKit at r75315: Move Android-specific WebCore files to Source
This moves files in the following WebCore subdirectories ...
- bindings/js
- bindings/v8/custom
- plugins/android
- platform/android
- platform/graphics/android
- page/
- css/
- dom/
- loader/archive/android
Diffstat (limited to 'Source/WebCore/platform/graphics/android/TilesManager.cpp')
-rw-r--r-- | Source/WebCore/platform/graphics/android/TilesManager.cpp | 440 |
1 files changed, 440 insertions, 0 deletions
diff --git a/Source/WebCore/platform/graphics/android/TilesManager.cpp b/Source/WebCore/platform/graphics/android/TilesManager.cpp new file mode 100644 index 0000000..5a9a164 --- /dev/null +++ b/Source/WebCore/platform/graphics/android/TilesManager.cpp @@ -0,0 +1,440 @@ +/* + * Copyright 2010, 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 "TilesManager.h" + +#if USE(ACCELERATED_COMPOSITING) + +#include "BaseTile.h" +#include "SkCanvas.h" +#include "SkDevice.h" +#include "SkPaint.h" +#include <cutils/atomic.h> + +#ifdef DEBUG + +#include <cutils/log.h> +#include <wtf/CurrentTime.h> +#include <wtf/text/CString.h> + +#undef XLOG +#define XLOG(...) android_printLog(ANDROID_LOG_DEBUG, "TilesManager", __VA_ARGS__) + +#else + +#undef XLOG +#define XLOG(...) + +#endif // DEBUG + +// Important: We need at least twice as much textures as is needed to cover +// one viewport, otherwise the allocation may stall. +// We need n textures for one TiledPage, and another n textures for the +// second page used when scaling. +// In our case, we use 300x300 textures. On the tablet, this equates to +// at least 5 * 3 = 15 textures. We also enable offscreen textures to a maximum +// of 101 textures used (i.e. ~70Mb max, accounting for the double buffer textures) +#define EXPANDED_TILE_BOUNDS_X 1 +#define EXPANDED_TILE_BOUNDS_Y 2 +#define MAX_TEXTURE_ALLOCATION 3+(5+EXPANDED_TILE_BOUNDS_X*2)*(3+EXPANDED_TILE_BOUNDS_Y*2)*2 +#define TILE_WIDTH 300 +#define TILE_HEIGHT 300 + +// Define a maximum amount of ram used by layers +#define MAX_LAYERS_ALLOCATION 33554432 // 32Mb +// Define a maximum amount of ram used by one layer +#define MAX_LAYER_ALLOCATION 8388608 // 8Mb +#define BYTES_PER_PIXEL 4 // 8888 config + +namespace WebCore { + +GLint TilesManager::getMaxTextureSize() +{ + static GLint maxTextureSize = 0; + if (!maxTextureSize) + glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxTextureSize); + return maxTextureSize; +} + +int TilesManager::getMaxTextureAllocation() +{ + return MAX_TEXTURE_ALLOCATION; +} + +TilesManager::TilesManager() + : m_layersMemoryUsage(0) + , m_maxTextureCount(0) + , m_expandedTileBounds(false) + , m_generatorReady(false) + , m_showVisualIndicator(false) +{ + XLOG("TilesManager ctor"); + m_textures.reserveCapacity(MAX_TEXTURE_ALLOCATION); + m_tilesBitmap = new SkBitmap(); + m_tilesBitmap->setConfig(SkBitmap::kARGB_8888_Config, tileWidth(), tileHeight()); + m_tilesBitmap->allocPixels(); + m_tilesBitmap->eraseColor(0); + m_pixmapsGenerationThread = new TexturesGenerator(); + m_pixmapsGenerationThread->run("TexturesGenerator"); +} + +void TilesManager::allocateTiles() +{ + int nbTexturesToAllocate = m_maxTextureCount - m_textures.size(); + XLOG("%d tiles to allocate (%d textures planned)", nbTexturesToAllocate, m_maxTextureCount); + int nbTexturesAllocated = 0; + for (int i = 0; i < nbTexturesToAllocate; i++) { + BackedDoubleBufferedTexture* texture = new BackedDoubleBufferedTexture( + tileWidth(), tileHeight(), m_tilesBitmap); + // the atomic load ensures that the texture has been fully initialized + // before we pass a pointer for other threads to operate on + BackedDoubleBufferedTexture* loadedTexture = + reinterpret_cast<BackedDoubleBufferedTexture*>( + android_atomic_acquire_load(reinterpret_cast<int32_t*>(&texture))); + m_textures.append(loadedTexture); + nbTexturesAllocated++; + } + XLOG("allocated %d textures", nbTexturesAllocated); +} + +void TilesManager::printTextures() +{ +#ifdef DEBUG + XLOG("++++++"); + for (unsigned int i = 0; i < m_textures.size(); i++) { + BackedDoubleBufferedTexture* texture = m_textures[i]; + BaseTile* o = 0; + if (texture->owner()) + o = (BaseTile*) texture->owner(); + int x = -1; + int y = -1; + if (o) { + x = o->x(); + y = o->y(); + } + XLOG("[%d] texture %x usedLevel: %d busy: %d owner: %x (%d, %d) page: %x scale: %.2f", + i, texture, texture->usedLevel(), + texture->busy(), o, x, y, o ? o->page() : 0, o ? o->scale() : 0); + } + XLOG("------"); +#endif // DEBUG +} + +void TilesManager::resetTextureUsage(TiledPage* page) +{ + android::Mutex::Autolock lock(m_texturesLock); + for (unsigned int i = 0; i < m_textures.size(); i++) { + BackedDoubleBufferedTexture* texture = m_textures[i]; + TextureOwner* owner = texture->owner(); + if (owner) { + if (owner->page() == page) + texture->setUsedLevel(-1); + } + } +} + +BackedDoubleBufferedTexture* TilesManager::getAvailableTexture(BaseTile* owner) +{ + android::Mutex::Autolock lock(m_texturesLock); + + // Sanity check that the tile does not already own a texture + if (owner->texture() && owner->texture()->owner() == owner) { + owner->texture()->setUsedLevel(0); + XLOG("same owner (%d, %d), getAvailableTexture(%x) => texture %x", + owner->x(), owner->y(), owner, owner->texture()); + return owner->texture(); + } + + // The heuristic for selecting a texture is as follows: + // 1. return an unused texture if one exists + // 2. return the farthest texture from the viewport (from any tiled page) + // 3. return any texture not used by the tile's page or the page's sibiling + // + // The texture level indicates a tiles closeness to the current viewport + BackedDoubleBufferedTexture* farthestTexture = 0; + int farthestTextureLevel = 0; + const unsigned int max = m_textures.size(); + for (unsigned int i = 0; i < max; i++) { + BackedDoubleBufferedTexture* texture = m_textures[i]; + if (texture->usedLevel() == -1) { // found an unused texture, grab it + farthestTexture = texture; + break; + } + if (farthestTextureLevel < texture->usedLevel()) { + farthestTextureLevel = texture->usedLevel(); + farthestTexture = texture; + } + } + if (farthestTexture && farthestTexture->acquire(owner)) { + XLOG("farthest texture, getAvailableTexture(%x) => texture %x (level %d)", + owner, farthestTexture, farthestTexture->usedLevel()); + farthestTexture->setUsedLevel(0); + return farthestTexture; + } + + // At this point, all textures are used or we failed to aquire the farthest + // texture. Now let's just grab a texture not in use by either of the two + // tiled pages associated with this view. + TiledPage* currentPage = owner->page(); + TiledPage* nextPage = currentPage->sibling(); + for (unsigned int i = 0; i < max; i++) { + BackedDoubleBufferedTexture* texture = m_textures[i]; + if (texture->tryAcquire(owner, currentPage, nextPage)) { + XLOG("grab a texture that wasn't ours, (%x != %x) at %d => texture %x", + owner->page(), texture->owner()->page(), i, texture); + texture->setUsedLevel(0); + return texture; + } + } + + XLOG("Couldn't find an available texture for BaseTile %x (%d, %d) !!!", + owner, owner->x(), owner->y()); +#ifdef DEBUG + printTextures(); +#endif // DEBUG + return 0; +} + +LayerTexture* TilesManager::getExistingTextureForLayer(LayerAndroid* layer, + const IntRect& rect, + bool any, + LayerTexture* texture) +{ + android::Mutex::Autolock lock(m_texturesLock); + LayerTexture* best = 0; + unsigned newestPictureUsed = 0; + for (unsigned int i = 0; i< m_layersTextures.size(); i++) { + if (m_layersTextures[i]->id() != layer->uniqueId()) + continue; + if (!any && rect != m_layersTextures[i]->rect()) + continue; + if (!any && layer->getScale() != m_layersTextures[i]->scale()) + continue; + if (any && texture == m_layersTextures[i]) + continue; + + if (m_layersTextures[i]->ready()) { + unsigned int pictureUsed = m_layersTextures[i]->pictureUsed(); + if (pictureUsed >= newestPictureUsed) { + newestPictureUsed = pictureUsed; + best = m_layersTextures[i]; + } + } + + XLOG("return layer %d (%x) for tile %d (%x)", + i, m_layersTextures[i], + layer->uniqueId(), layer); + } + + if (best && best->acquire(layer, any)) + return best; + return 0; +} + +void TilesManager::printLayersTextures(const char* s) +{ +#ifdef DEBUG + XLOG(">>> print layers textures (%s)", s); + for (unsigned int i = 0; i< m_layersTextures.size(); i++) { + XLOG("[%d] %s, texture %x for layer %d (w: %.2f, h: %.2f), owner: %x", + i, s, m_layersTextures[i], + m_layersTextures[i]->id(), + m_layersTextures[i]->getSize().fWidth, + m_layersTextures[i]->getSize().fHeight, + m_layersTextures[i]->owner()); + } + XLOG("<<< print layers textures (%s)", s); +#endif +} + +void TilesManager::cleanupLayersTextures(LayerAndroid* layer, bool forceCleanup) +{ + android::Mutex::Autolock lock(m_texturesLock); + SkLayer* rootLayer = 0; + if (layer) + rootLayer = layer->getRootLayer(); +#ifdef DEBUG + if (forceCleanup) + XLOG("FORCE cleanup"); + XLOG("before cleanup, memory %d", m_layersMemoryUsage); + printLayersTextures("before cleanup"); +#endif + for (unsigned int i = 0; i< m_layersTextures.size();) { + LayerTexture* texture = m_layersTextures[i]; + + if (forceCleanup && texture->owner()) { + LayerAndroid* textureLayer = + static_cast<LayerAndroid*>(texture->owner()); + if (textureLayer->getRootLayer() != rootLayer) { + // We only want to force destroy layers + // that are not used by the current page + XLOG("force removing texture %x for layer %d", + texture, textureLayer->uniqueId()); + textureLayer->removeTexture(texture); + } + } + + // We only try to destroy textures that have no owners. + // This could be due to: + // 1) - the LayerAndroid dtor has been called (i.e. when swapping + // a LayerAndroid tree with a new one) + // 2) - or due to the above code, forcing a destroy. + // If the texture has been forced to be released (case #2), it + // could still be in use (in the middle of being painted). So we + // need to check that's not the case by checking busy(). See + // LayerAndroid::paintBitmapGL(). + if (!texture->owner() && !texture->busy()) { + m_layersMemoryUsage -= (int) texture->getSize().fWidth + * (int) texture->getSize().fHeight * BYTES_PER_PIXEL; + m_layersTextures.remove(i); + // We can destroy the texture. We first remove it from the textures + // list, and then remove any queued drawing. At this point we know + // the texture has been removed from the layer, and that it's not + // busy, so it's safe to delete. + m_pixmapsGenerationThread->removeOperationsForTexture(texture); + XLOG("delete texture %x", texture); + delete texture; + } else { + // only iterate if we don't delete (if we delete, no need to as we + // remove the element from the array) + i++; + } + } +#ifdef DEBUG + printLayersTextures("after cleanup"); + XLOG("after cleanup, memory %d", m_layersMemoryUsage); +#endif +} + +LayerTexture* TilesManager::createTextureForLayer(LayerAndroid* layer, const IntRect& rect) +{ + int w = rect.width() * layer->getScale(); + int h = rect.height() * layer->getScale(); + unsigned int size = w * h * BYTES_PER_PIXEL; + + // We will not allocate textures that: + // 1) cannot be handled by the graphic card (maxTextureSize & + // totalMaxTextureSize) + // 2) will make us go past our texture limit (MAX_LAYERS_ALLOCATION) + + GLint maxTextureSize = getMaxTextureSize(); + unsigned totalMaxTextureSize = maxTextureSize * maxTextureSize * BYTES_PER_PIXEL; + bool large = w > maxTextureSize || h > maxTextureSize || size > totalMaxTextureSize; + XLOG("createTextureForLayer(%d) @scale %.2f => %d, %d (too large? %x)", layer->uniqueId(), + layer->getScale(), w, h, large); + + // For now just return 0 if too large + if (large) + return 0; + + if (w == 0 || h == 0) // empty layer + return 0; + + if (m_layersMemoryUsage + size > MAX_LAYERS_ALLOCATION) + cleanupLayersTextures(layer, true); + + LayerTexture* texture = new LayerTexture(w, h); + texture->setId(layer->uniqueId()); + texture->setRect(rect); + texture->setScale(layer->getScale()); + + android::Mutex::Autolock lock(m_texturesLock); + m_layersTextures.append(texture); + texture->acquire(layer); + m_layersMemoryUsage += size; + return texture; +} + +int TilesManager::maxLayersAllocation() +{ + return MAX_LAYERS_ALLOCATION; +} + +int TilesManager::maxLayerAllocation() +{ + return MAX_LAYER_ALLOCATION; +} + +int TilesManager::maxTextureCount() +{ + android::Mutex::Autolock lock(m_texturesLock); + return m_maxTextureCount; +} + +void TilesManager::setMaxTextureCount(int max) +{ + XLOG("setMaxTextureCount: %d (current: %d, total:%d)", + max, m_maxTextureCount, MAX_TEXTURE_ALLOCATION); + if (m_maxTextureCount && + (max > MAX_TEXTURE_ALLOCATION || + max <= m_maxTextureCount)) + return; + + android::Mutex::Autolock lock(m_texturesLock); + + if (max < MAX_TEXTURE_ALLOCATION) + m_maxTextureCount = max; + else + m_maxTextureCount = MAX_TEXTURE_ALLOCATION; + + allocateTiles(); +} + +float TilesManager::tileWidth() +{ + return TILE_WIDTH; +} + +float TilesManager::tileHeight() +{ + return TILE_HEIGHT; +} + +int TilesManager::expandedTileBoundsX() { + return m_expandedTileBounds ? EXPANDED_TILE_BOUNDS_X : 0; +} + +int TilesManager::expandedTileBoundsY() { + return m_expandedTileBounds ? EXPANDED_TILE_BOUNDS_Y : 0; +} + +TilesManager* TilesManager::instance() +{ + if (!gInstance) { + gInstance = new TilesManager(); + XLOG("instance(), new gInstance is %x", gInstance); + XLOG("Waiting for the generator..."); + gInstance->waitForGenerator(); + XLOG("Generator ready!"); + } + return gInstance; +} + +TilesManager* TilesManager::gInstance = 0; + +} // namespace WebCore + +#endif // USE(ACCELERATED_COMPOSITING) |