/* * Copyright (C) 2009 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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 APPLE INC. ``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 APPLE COMPUTER, INC. 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" #if USE(ACCELERATED_COMPOSITING) #import "WebLayer.h" #import "GraphicsContext.h" #import "GraphicsLayer.h" #import <QuartzCore/QuartzCore.h> #import "WebCoreTextRenderer.h" #import <wtf/UnusedParam.h> #import "WKGraphics.h" #import "WAKWindow.h" #import "WebCoreThread.h" #import <QuartzCore/QuartzCorePrivate.h> using namespace WebCore; @interface WebLayer(Private) - (void)drawScaledContentsInContext:(CGContextRef)context; @end @implementation WebLayer + (void)drawContents:(WebCore::GraphicsLayer*)layerContents ofLayer:(CALayer*)layer intoContext:(CGContextRef)context { UNUSED_PARAM(layer); WKSetCurrentGraphicsContext(context); CGContextSaveGState(context); CGContextSetShouldAntialias(context, NO); if (layerContents && layerContents->client()) { WKFontAntialiasingStateSaver fontAntialiasingState(true); fontAntialiasingState.setup([WAKWindow hasLandscapeOrientation]); GraphicsContext graphicsContext(context); // It's important to get the clip from the context, because it may be significantly // smaller than the layer bounds (e.g. tiled layers) CGRect clipBounds = CGContextGetClipBoundingBox(context); IntRect clip(enclosingIntRect(clipBounds)); layerContents->paintGraphicsLayerContents(graphicsContext, clip); fontAntialiasingState.restore(); } #ifndef NDEBUG else { ASSERT_NOT_REACHED(); // FIXME: ideally we'd avoid calling -setNeedsDisplay on a layer that is a plain color, // so CA never makes backing store for it (which is what -setNeedsDisplay will do above). CGContextSetRGBFillColor(context, 0.0f, 1.0f, 0.0f, 1.0f); CGRect aBounds = [layer bounds]; CGContextFillRect(context, aBounds); } #endif CGContextRestoreGState(context); #ifdef SUPPORT_DEBUG_INDICATORS if (layerContents && layerContents->showRepaintCounter()) { bool isTiledLayer = [layer isKindOfClass:[CATiledLayer class]]; char text[16]; // that's a lot of repaints snprintf(text, sizeof(text), "%d", layerContents->incrementRepaintCount()); CGAffineTransform a = CGContextGetCTM(context); CGContextSaveGState(context); if (isTiledLayer) CGContextSetRGBFillColor(context, 0.0f, 1.0f, 0.0f, 0.8f); else CGContextSetRGBFillColor(context, 1.0f, 0.0f, 0.0f, 0.8f); CGRect aBounds = [layer bounds]; aBounds.size.width = 10 + 12 * strlen(text); aBounds.size.height = 25; CGContextFillRect(context, aBounds); CGContextSetRGBFillColor(context, 0.0f, 0.0f, 0.0f, 1.0f); CGContextSetTextMatrix(context, CGAffineTransformMakeScale(1.0f, -1.0f)); CGContextSelectFont(context, "Helvetica", 25, kCGEncodingMacRoman); CGContextShowTextAtPoint(context, aBounds.origin.x + 3.0f, aBounds.origin.y + 20.0f, text, strlen(text)); CGContextRestoreGState(context); } #endif // SUPPORT_DEBUG_INDICATORS } // Disable default animations - (id<CAAction>)actionForKey:(NSString *)key { UNUSED_PARAM(key); return nil; } - (id)init { if ((self = [super init])) m_contentsScale = 1.0f; return self; } // Implement this so presentationLayer can get our custom attributes - (id)initWithLayer:(id)layer { if ((self = [super initWithLayer:layer])) { m_layerOwner = [(WebLayer*)layer layerOwner]; m_contentsScale = [layer contentsScale]; } return self; } - (void)setNeedsDisplay { if (m_layerOwner && m_layerOwner->client() && m_layerOwner->drawsContent()) [super setNeedsDisplay]; } - (void)setNeedsDisplayInRect:(CGRect)dirtyRect { if (m_layerOwner && m_layerOwner->client() && m_layerOwner->drawsContent()) { [CATransaction lock]; id layerContents = [self contents]; if (layerContents && CFGetTypeID(layerContents) == CABackingStoreGetTypeID()) { CABackingStoreRef backingStore = (CABackingStoreRef)layerContents; if (CGRectIsInfinite(dirtyRect)) CABackingStoreInvalidate(backingStore, 0); else { CGRect layerBounds = [self bounds]; CGAffineTransform layerToBackingTransform; // CA layers default to flipped on iPhone int32_t height = ceilf(layerBounds.size.height * m_contentsScale); layerToBackingTransform = CGAffineTransformMakeTranslation(0.0f, height); layerToBackingTransform = CGAffineTransformScale(layerToBackingTransform, 1.0f, -1.0f); layerToBackingTransform = CGAffineTransformScale(layerToBackingTransform, m_contentsScale, m_contentsScale); CGRect backingDirtyRect = CGRectApplyAffineTransform(dirtyRect, layerToBackingTransform); CABackingStoreInvalidate(backingStore, &backingDirtyRect); #ifdef SUPPORT_DEBUG_INDICATORS if (m_layerOwner->showRepaintCounter()) { CGRect counterRect = CGRectMake(layerBounds.origin.x, layerBounds.origin.y, 46, 25); counterRect = CGRectApplyAffineTransform(counterRect, layerToBackingTransform); CABackingStoreInvalidate(backingStore, &counterRect); } #endif // SUPPORT_DEBUG_INDICATORS } } // just sets the 'display needed' flag on the layer [super setNeedsDisplayInRect:CGRectNull]; [CATransaction unlock]; } } static void backing_store_callback(CGContextRef inContext, void *info) { WebLayer* self = reinterpret_cast<WebLayer*>(info); [self drawScaledContentsInContext:inContext]; } - (void)display { CGRect layerBounds = [self bounds]; if (layerBounds.size.width <= 0.0f || layerBounds.size.height <= 0.0f) return; // This method is almost always called without the web thread lock held, // in which case we need to grab the lock. It can be called with the // web thread lock held via LCLayer::setParentLayer, which does a // synchronous commit, and is always called on the web thread. In // that case the flag is set, indicating that we don't need to grab the // web thread lock. This is all because the web thread lock is not re-entrant // on the web thread, for policy reasons. bool locked = false; if (!WebThreadIsCurrent() /* || !LCLayer::gInSynchronousCommit */) { WebThreadLock(); locked = true; } ASSERT(WebThreadIsLocked()); [CATransaction lock]; id contents = [self contents]; CABackingStoreRef backingStore; if (contents && CFGetTypeID(contents) == CABackingStoreGetTypeID()) { backingStore = (CABackingStoreRef)CFRetain(contents); } else { backingStore = CABackingStoreCreate(); CABackingStoreInvalidate(backingStore, NULL); } [CATransaction unlock]; if (backingStore) { // FIXME cap to max size int32_t width = ceilf(layerBounds.size.width * m_contentsScale); int32_t height = ceilf(layerBounds.size.height * m_contentsScale); uint32_t flags; if ([self isOpaque]) flags = kCABackingStoreOpaque; else flags = kCABackingStoreCleared; CABackingStoreUpdate(backingStore, width, height, flags, backing_store_callback, self); if ((id)backingStore != contents) [self setContents:(id)backingStore]; [self setContentsChanged]; CFRelease(backingStore); } else { #ifndef NDEBUG NSLog(@"*** failed to create backing store for layer %@", self); #endif } if (locked) WebThreadUnlock(); } - (void)drawScaledContentsInContext:(CGContextRef)inContext { // CA layers default to flipped on iPhone CGRect layerBounds = [self bounds]; int32_t height = ceilf(layerBounds.size.height * m_contentsScale); CGContextTranslateCTM(inContext, 0.0f, height); CGContextScaleCTM(inContext, 1.0f, -1.0f); CGContextScaleCTM(inContext, m_contentsScale, m_contentsScale); [self drawInContext:inContext]; } - (void)drawInContext:(CGContextRef)context { [WebLayer drawContents:m_layerOwner ofLayer:self intoContext:context]; } @end // implementation WebLayer #pragma mark - @implementation WebLayer(WebLayerAdditions) - (void)setLayerOwner:(GraphicsLayer*)aLayer { m_layerOwner = aLayer; } - (GraphicsLayer*)layerOwner { return m_layerOwner; } - (float)contentsScale { return m_contentsScale; } - (void)setContentsScale:(float)scale { if (scale != m_contentsScale) { m_contentsScale = scale; [self setContents:nil]; [self setNeedsDisplay]; } } @end #pragma mark - #ifndef NDEBUG @implementation CALayer(ExtendedDescription) - (NSString*)_descriptionWithPrefix:(NSString*)inPrefix { CGRect aBounds = [self bounds]; CGPoint aPos = [self position]; CATransform3D t = [self transform]; NSString* selfString = [NSString stringWithFormat:@"%@<%@ 0x%08x> \"%@\" bounds(%.1f, %.1f, %.1f, %.1f) pos(%.1f, %.1f), sublayers=%d masking=%d", inPrefix, [self class], self, [self name], aBounds.origin.x, aBounds.origin.y, aBounds.size.width, aBounds.size.height, aPos.x, aPos.y, [[self sublayers] count], [self masksToBounds]]; NSMutableString* curDesc = [NSMutableString stringWithString:selfString]; if ([[self sublayers] count] > 0) [curDesc appendString:@"\n"]; NSString* sublayerPrefix = [inPrefix stringByAppendingString:@"\t"]; NSEnumerator* sublayersEnum = [[self sublayers] objectEnumerator]; CALayer* curLayer; while ((curLayer = [sublayersEnum nextObject])) [curDesc appendString:[curLayer _descriptionWithPrefix:sublayerPrefix]]; if ([[self sublayers] count] == 0) [curDesc appendString:@"\n"]; return curDesc; } - (NSString*)extendedDescription { return [self _descriptionWithPrefix:@""]; } @end // implementation WebLayer(ExtendedDescription) #endif // NDEBUG #endif // USE(ACCELERATED_COMPOSITING)