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      1 /*
      2  * Copyright (C) 2009 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 
     28 #if USE(ACCELERATED_COMPOSITING)
     29 
     30 #import "WebTiledLayer.h"
     31 
     32 #import "GraphicsContext.h"
     33 #import "GraphicsLayerCA.h"
     34 #import "PlatformCALayer.h"
     35 #import <wtf/UnusedParam.h>
     36 
     37 using namespace WebCore;
     38 
     39 @implementation WebTiledLayer
     40 
     41 // Set a zero duration for the fade in of tiles
     42 + (CFTimeInterval)fadeDuration
     43 {
     44     return 0;
     45 }
     46 
     47 // Make sure that tiles are drawn on the main thread
     48 + (BOOL)shouldDrawOnMainThread
     49 {
     50     return YES;
     51 }
     52 
     53 // Disable default animations
     54 - (id<CAAction>)actionForKey:(NSString *)key
     55 {
     56     UNUSED_PARAM(key);
     57     return nil;
     58 }
     59 
     60 - (void)setNeedsDisplay
     61 {
     62     PlatformCALayer* layer = PlatformCALayer::platformCALayer(self);
     63     if (layer && layer->owner() && layer->owner()->platformCALayerDrawsContent())
     64         [super setNeedsDisplay];
     65 }
     66 
     67 - (void)setNeedsDisplayInRect:(CGRect)dirtyRect
     68 {
     69     PlatformCALayer* layer = PlatformCALayer::platformCALayer(self);
     70     if (layer)
     71         setLayerNeedsDisplayInRect(self, layer->owner(), dirtyRect);
     72 }
     73 
     74 - (void)display
     75 {
     76     [super display];
     77     PlatformCALayer* layer = PlatformCALayer::platformCALayer(self);
     78     if (layer && layer->owner())
     79         layer->owner()->platformCALayerLayerDidDisplay(self);
     80 }
     81 
     82 - (void)drawInContext:(CGContextRef)context
     83 {
     84     PlatformCALayer* layer = PlatformCALayer::platformCALayer(self);
     85     if (layer)
     86         drawLayerContents(context, self, layer);
     87 }
     88 
     89 @end // implementation WebTiledLayer
     90 
     91 #endif // USE(ACCELERATED_COMPOSITING)
     92