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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 "GraphicsLayer.h"
     34 #import <wtf/UnusedParam.h>
     35 
     36 using namespace WebCore;
     37 
     38 @implementation WebTiledLayer
     39 
     40 // Set a zero duration for the fade in of tiles
     41 + (CFTimeInterval)fadeDuration
     42 {
     43     return 0;
     44 }
     45 
     46 // Make sure that tiles are drawn on the main thread
     47 + (BOOL)shouldDrawOnMainThread
     48 {
     49     return YES;
     50 }
     51 
     52 // Disable default animations
     53 - (id<CAAction>)actionForKey:(NSString *)key
     54 {
     55     UNUSED_PARAM(key);
     56     return nil;
     57 }
     58 
     59 // Implement this so presentationLayer can get our custom attributes
     60 - (id)initWithLayer:(id)layer
     61 {
     62     if ((self = [super initWithLayer:layer]))
     63         m_layerOwner = [(WebLayer*)layer layerOwner];
     64 
     65     return self;
     66 }
     67 
     68 - (void)setNeedsDisplay
     69 {
     70     if (m_layerOwner && m_layerOwner->client() && m_layerOwner->drawsContent())
     71         [super setNeedsDisplay];
     72 }
     73 
     74 - (void)setNeedsDisplayInRect:(CGRect)dirtyRect
     75 {
     76     if (m_layerOwner && m_layerOwner->client() && m_layerOwner->drawsContent()) {
     77 #if defined(BUILDING_ON_LEOPARD)
     78         dirtyRect = CGRectApplyAffineTransform(dirtyRect, [self contentsTransform]);
     79 #endif
     80         [super setNeedsDisplayInRect:dirtyRect];
     81 
     82 #ifndef NDEBUG
     83         if (m_layerOwner->showRepaintCounter()) {
     84             CGRect bounds = [self bounds];
     85             CGRect indicatorRect = CGRectMake(bounds.origin.x, bounds.origin.y, 46, 25);
     86 #if defined(BUILDING_ON_LEOPARD)
     87             indicatorRect = CGRectApplyAffineTransform(indicatorRect, [self contentsTransform]);
     88 #endif
     89             [super setNeedsDisplayInRect:indicatorRect];
     90         }
     91 #endif
     92     }
     93 }
     94 
     95 - (void)display
     96 {
     97     [super display];
     98     if (m_layerOwner)
     99         m_layerOwner->didDisplay(self);
    100 }
    101 
    102 - (void)drawInContext:(CGContextRef)ctx
    103 {
    104     [WebLayer drawContents:m_layerOwner ofLayer:self intoContext:ctx];
    105 }
    106 
    107 @end // implementation WebTiledLayer
    108 
    109 #pragma mark -
    110 
    111 @implementation WebTiledLayer(LayerMacAdditions)
    112 
    113 - (void)setLayerOwner:(GraphicsLayer*)aLayer
    114 {
    115     m_layerOwner = aLayer;
    116 }
    117 
    118 - (GraphicsLayer*)layerOwner
    119 {
    120     return m_layerOwner;
    121 }
    122 
    123 @end
    124 
    125 #endif // USE(ACCELERATED_COMPOSITING)
    126