void RenderSVGResourcePattern::buildPattern(PatternData* patternData, PassOwnPtr<ImageBuffer> tileImage) const
{
if (!tileImage->image()) {
patternData->pattern = 0;
return;
}
IntRect tileRect = tileImage->image()->rect();
if (tileRect.width() <= patternData->boundaries.width() && tileRect.height() <= patternData->boundaries.height()) {
patternData->pattern = Pattern::create(tileImage->image(), true, true);
return;
}
// Draw the first cell of the pattern manually to support overflow="visible" on all platforms.
int tileWidth = static_cast<int>(patternData->boundaries.width() + 0.5f);
int tileHeight = static_cast<int>(patternData->boundaries.height() + 0.5f);
// Don't create ImageBuffers with image size of 0
if (!tileWidth || !tileHeight) {
patternData->pattern = 0;
return;
}
OwnPtr<ImageBuffer> newTileImage = ImageBuffer::create(IntSize(tileWidth, tileHeight));
GraphicsContext* newTileImageContext = newTileImage->context();
int numY = static_cast<int>(ceilf(tileRect.height() / tileHeight)) + 1;
int numX = static_cast<int>(ceilf(tileRect.width() / tileWidth)) + 1;
newTileImageContext->save();
newTileImageContext->translate(-patternData->boundaries.width() * numX, -patternData->boundaries.height() * numY);
for (int i = numY; i > 0; --i) {
newTileImageContext->translate(0, patternData->boundaries.height());
for (int j = numX; j > 0; --j) {
newTileImageContext->translate(patternData->boundaries.width(), 0);
newTileImageContext->drawImage(tileImage->image(), style()->colorSpace(), tileRect, tileRect);
}
newTileImageContext->translate(-patternData->boundaries.width() * numX, 0);
}
newTileImageContext->restore();
patternData->pattern = Pattern::create(newTileImage->image(), true, true);
}
