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Diffstat (limited to 'Source/WebCore/platform/graphics/android/TileGrid.cpp')
| -rw-r--r-- | Source/WebCore/platform/graphics/android/TileGrid.cpp | 371 |
1 files changed, 371 insertions, 0 deletions
diff --git a/Source/WebCore/platform/graphics/android/TileGrid.cpp b/Source/WebCore/platform/graphics/android/TileGrid.cpp new file mode 100644 index 0000000..19a1815 --- /dev/null +++ b/Source/WebCore/platform/graphics/android/TileGrid.cpp @@ -0,0 +1,371 @@ +/* + * 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. + */ + +#define LOG_TAG "TileGrid" +#define LOG_NDEBUG 1 + +#include "config.h" +#include "TileGrid.h" + +#include "AndroidLog.h" +#include "GLWebViewState.h" +#include "PaintTileOperation.h" +#include "Tile.h" +#include "TilesManager.h" + +#include <wtf/CurrentTime.h> + +#define EXPANDED_BOUNDS_INFLATE 1 +#define EXPANDED_PREFETCH_BOUNDS_Y_INFLATE 1 + +namespace WebCore { + +TileGrid::TileGrid(bool isBaseSurface) + : m_prevTileY(0) + , m_scale(1) + , m_isBaseSurface(isBaseSurface) +{ + m_dirtyRegion.setEmpty(); +#ifdef DEBUG_COUNT + ClassTracker::instance()->increment("TileGrid"); +#endif +} + +TileGrid::~TileGrid() +{ +#ifdef DEBUG_COUNT + ClassTracker::instance()->decrement("TileGrid"); +#endif + removeTiles(); +} + +bool TileGrid::isReady() +{ + bool tilesAllReady = true; + bool tilesVisible = false; + for (unsigned int i = 0; i < m_tiles.size(); i++) { + Tile* tile = m_tiles[i]; + if (tile->isTileVisible(m_area)) { + tilesVisible = true; + if (!tile->isTileReady()) { + tilesAllReady = false; + break; + } + } + } + // For now, if no textures are available, consider ourselves as ready + // in order to unblock the zooming process. + // FIXME: have a better system -- maybe keeping the last scale factor + // able to fully render everything + ALOGV("TT %p, ready %d, visible %d, texturesRemain %d", + this, tilesAllReady, tilesVisible, + TilesManager::instance()->layerTexturesRemain()); + + return !TilesManager::instance()->layerTexturesRemain() + || !tilesVisible || tilesAllReady; +} + +bool TileGrid::isMissingContent() +{ + for (unsigned int i = 0; i < m_tiles.size(); i++) + if (m_tiles[i]->isTileVisible(m_area) && !m_tiles[i]->frontTexture()) + return true; + return false; +} + +void TileGrid::swapTiles() +{ + int swaps = 0; + for (unsigned int i = 0; i < m_tiles.size(); i++) + if (m_tiles[i]->swapTexturesIfNeeded()) + swaps++; + ALOGV("TT %p swapping, swaps = %d", this, swaps); +} + +IntRect TileGrid::computeTilesArea(const IntRect& contentArea, float scale) +{ + IntRect computedArea; + IntRect area(contentArea.x() * scale, + contentArea.y() * scale, + ceilf(contentArea.width() * scale), + ceilf(contentArea.height() * scale)); + + ALOGV("TT %p prepare, scale %f, area %d x %d", this, scale, area.width(), area.height()); + + if (area.width() == 0 && area.height() == 0) { + computedArea.setWidth(0); + computedArea.setHeight(0); + return computedArea; + } + + int tileWidth = TilesManager::tileWidth(); + int tileHeight = TilesManager::tileHeight(); + + computedArea.setX(area.x() / tileWidth); + computedArea.setY(area.y() / tileHeight); + float right = (area.x() + area.width()) / (float) tileWidth; + float bottom = (area.y() + area.height()) / (float) tileHeight; + computedArea.setWidth(ceilf(right) - computedArea.x()); + computedArea.setHeight(ceilf(bottom) - computedArea.y()); + return computedArea; +} + +void TileGrid::prepareGL(GLWebViewState* state, float scale, + const IntRect& prepareArea, const IntRect& unclippedArea, + TilePainter* painter, bool isLowResPrefetch, bool useExpandPrefetch) +{ + // first, how many tiles do we need + m_area = computeTilesArea(prepareArea, scale); + if (m_area.isEmpty()) + return; + + ALOGV("prepare TileGrid %p with scale %.2f, prepareArea " + " %d, %d - %d x %d, corresponding to %d, %d x - %d x %d tiles", + this, scale, + prepareArea.x(), prepareArea.y(), + prepareArea.width(), prepareArea.height(), + m_area.x(), m_area.y(), + m_area.width(), m_area.height()); + + bool goingDown = m_prevTileY < m_area.y(); + m_prevTileY = m_area.y(); + + if (scale != m_scale) + TilesManager::instance()->removeOperationsForFilter(new ScaleFilter(painter, m_scale)); + + m_scale = scale; + + // apply dirty region to affected tiles + if (!m_dirtyRegion.isEmpty()) { + for (unsigned int i = 0; i < m_tiles.size(); i++) + m_tiles[i]->markAsDirty(m_dirtyRegion); + + // log inval region for the base surface + if (m_isBaseSurface && TilesManager::instance()->getProfiler()->enabled()) { + SkRegion::Iterator iterator(m_dirtyRegion); + while (!iterator.done()) { + SkIRect r = iterator.rect(); + TilesManager::instance()->getProfiler()->nextInval(r, scale); + iterator.next(); + } + } + m_dirtyRegion.setEmpty(); + } + + // prepare standard bounds (clearing ExpandPrefetch flag) + for (int i = 0; i < m_area.width(); i++) { + if (goingDown) { + for (int j = 0; j < m_area.height(); j++) + prepareTile(m_area.x() + i, m_area.y() + j, + painter, state, isLowResPrefetch, false); + } else { + for (int j = m_area.height() - 1; j >= 0; j--) + prepareTile(m_area.x() + i, m_area.y() + j, + painter, state, isLowResPrefetch, false); + } + } + + // prepare expanded bounds + if (useExpandPrefetch) { + IntRect fullArea = computeTilesArea(unclippedArea, scale); + IntRect expandedArea = m_area; + expandedArea.inflate(EXPANDED_BOUNDS_INFLATE); + + if (isLowResPrefetch) + expandedArea.inflate(EXPANDED_PREFETCH_BOUNDS_Y_INFLATE); + + // clip painting area to content + expandedArea.intersect(fullArea); + + for (int i = expandedArea.x(); i < expandedArea.maxX(); i++) + for (int j = expandedArea.y(); j < expandedArea.maxY(); j++) + if (!m_area.contains(i, j)) + prepareTile(i, j, painter, state, isLowResPrefetch, true); + } +} + +void TileGrid::markAsDirty(const SkRegion& invalRegion) +{ + ALOGV("TT %p markAsDirty, current region empty %d, new empty %d", + this, m_dirtyRegion.isEmpty(), invalRegion.isEmpty()); + m_dirtyRegion.op(invalRegion, SkRegion::kUnion_Op); +} + +void TileGrid::prepareTile(int x, int y, TilePainter* painter, + GLWebViewState* state, bool isLowResPrefetch, bool isExpandPrefetch) +{ + Tile* tile = getTile(x, y); + if (!tile) { + bool isLayerTile = !m_isBaseSurface; + tile = new Tile(isLayerTile); + m_tiles.append(tile); + } + + ALOGV("preparing tile %p at %d, %d, painter is %p", tile, x, y, painter); + + tile->setContents(x, y, m_scale, isExpandPrefetch); + + // TODO: move below (which is largely the same for layers / tiled page) into + // prepareGL() function + + if (tile->isDirty() || !tile->frontTexture()) + tile->reserveTexture(); + + if (tile->backTexture() && tile->isDirty() && !tile->isRepaintPending()) { + ALOGV("painting TT %p's tile %d %d for LG %p", this, x, y, painter); + PaintTileOperation *operation = new PaintTileOperation(tile, painter, + state, isLowResPrefetch); + TilesManager::instance()->scheduleOperation(operation); + } +} + +Tile* TileGrid::getTile(int x, int y) +{ + for (unsigned int i = 0; i <m_tiles.size(); i++) { + Tile* tile = m_tiles[i]; + if (tile->x() == x && tile->y() == y) + return tile; + } + return 0; +} + +int TileGrid::nbTextures(IntRect& area, float scale) +{ + IntRect tileBounds = computeTilesArea(area, scale); + int numberTextures = tileBounds.width() * tileBounds.height(); + + // add the number of dirty tiles in the bounds, as they take up double + // textures for double buffering + for (unsigned int i = 0; i <m_tiles.size(); i++) { + Tile* tile = m_tiles[i]; + if (tile->isDirty() + && tile->x() >= tileBounds.x() && tile->x() <= tileBounds.maxX() + && tile->y() >= tileBounds.y() && tile->y() <= tileBounds.maxY()) + numberTextures++; + } + return numberTextures; +} + +void TileGrid::drawGL(const IntRect& visibleArea, float opacity, + const TransformationMatrix* transform, + const Color* background) +{ + m_area = computeTilesArea(visibleArea, m_scale); + if (m_area.width() == 0 || m_area.height() == 0) + return; + + float invScale = 1 / m_scale; + const float tileWidth = TilesManager::tileWidth() * invScale; + const float tileHeight = TilesManager::tileHeight() * invScale; + + int drawn = 0; + + SkRegion missingRegion; + bool translucentBaseSurface = + background ? (background->hasAlpha() && background->alpha() > 0) : false; + if (translucentBaseSurface) { + SkIRect totalArea = SkIRect::MakeXYWH(m_area.x(), m_area.y(), + m_area.width(), m_area.height()); + missingRegion = SkRegion(totalArea); + } + + for (unsigned int i = 0; i < m_tiles.size(); i++) { + Tile* tile = m_tiles[i]; + + bool tileInView = tile->isTileVisible(m_area); + if (tileInView) { + SkRect rect; + rect.fLeft = tile->x() * tileWidth; + rect.fTop = tile->y() * tileHeight; + rect.fRight = rect.fLeft + tileWidth; + rect.fBottom = rect.fTop + tileHeight; + ALOGV("tile %p (layer tile: %d) %d,%d at scale %.2f vs %.2f [ready: %d] dirty: %d", + tile, tile->isLayerTile(), tile->x(), tile->y(), + tile->scale(), m_scale, tile->isTileReady(), tile->isDirty()); + + bool success = tile->drawGL(opacity, rect, m_scale, transform); + if (translucentBaseSurface && success) { + // Cut the successful drawn tile area from the missing region. + missingRegion.op(SkIRect::MakeXYWH(tile->x(), tile->y(), 1, 1), + SkRegion::kDifference_Op); + } + if (tile->frontTexture()) + drawn++; + } + + if (translucentBaseSurface) + TilesManager::instance()->getProfiler()->nextTile(tile, invScale, tileInView); + } + + // Draw missing Regions with blend turned on + if (translucentBaseSurface) + drawMissingRegion(missingRegion, opacity, background); + + ALOGV("TT %p drew %d tiles, scale %f", + this, drawn, m_scale); +} + +void TileGrid::drawMissingRegion(const SkRegion& region, float opacity, + const Color* background) +{ + SkRegion::Iterator iterator(region); + const float tileWidth = TilesManager::tileWidth() / m_scale; + const float tileHeight = TilesManager::tileHeight() / m_scale; + ShaderProgram* shader = TilesManager::instance()->shader(); + while (!iterator.done()) { + SkIRect r = iterator.rect(); + SkRect rect; + rect.fLeft = r.x() * tileWidth; + rect.fTop = r.y() * tileHeight; + rect.fRight = rect.fLeft + tileWidth * r.width(); + rect.fBottom = rect.fTop + tileHeight * r.height(); + ALOGV("draw tile x y, %d %d (%d %d) opacity %f", r.x(), r.y(), + r.width(), r.height(), opacity); + // Skia is using pre-multiplied color. + Color postAlpha = Color(background->red() * background->alpha() / 255, + background->green() * background->alpha() / 255, + background->blue() * background->alpha() / 255, + background->alpha() ); + shader->drawQuad(rect, 0, opacity, postAlpha); + iterator.next(); + } +} + +void TileGrid::removeTiles() +{ + for (unsigned int i = 0; i < m_tiles.size(); i++) { + delete m_tiles[i]; + } + m_tiles.clear(); +} + +void TileGrid::discardTextures() +{ + ALOGV("TT %p discarding textures", this); + for (unsigned int i = 0; i < m_tiles.size(); i++) + m_tiles[i]->discardTextures(); +} + +} // namespace WebCore |