/*
* 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 "GraphicsLayerCA.h"
#import "PlatformCALayer.h"
#import <objc/objc-runtime.h>
#import <QuartzCore/QuartzCore.h>
#import <wtf/UnusedParam.h>
using namespace WebCore;
@implementation WebLayer
void drawLayerContents(CGContextRef context, CALayer *layer, WebCore::PlatformCALayer* platformLayer)
{
WebCore::PlatformCALayerClient* layerContents = platformLayer->owner();
if (!layerContents)
return;
CGContextSaveGState(context);
CGRect layerBounds = [layer bounds];
if (layerContents->platformCALayerContentsOrientation() == WebCore::GraphicsLayer::CompositingCoordinatesBottomUp) {
CGContextScaleCTM(context, 1, -1);
CGContextTranslateCTM(context, 0, -layerBounds.size.height);
}
[NSGraphicsContext saveGraphicsState];
// Set up an NSGraphicsContext for the context, so that parts of AppKit that rely on
// the current NSGraphicsContext (e.g. NSCell drawing) get the right one.
NSGraphicsContext* layerContext = [NSGraphicsContext graphicsContextWithGraphicsPort:context flipped:YES];
[NSGraphicsContext setCurrentContext:layerContext];
GraphicsContext graphicsContext(context);
graphicsContext.setIsCALayerContext(true);
graphicsContext.setIsAcceleratedContext(platformLayer->acceleratesDrawing());
if (!layerContents->platformCALayerContentsOpaque()) {
// Turn off font smoothing to improve the appearance of text rendered onto a transparent background.
graphicsContext.setShouldSmoothFonts(false);
}
// 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->platformCALayerPaintContents(graphicsContext, clip);
[NSGraphicsContext restoreGraphicsState];
// Re-fetch the layer owner, since <rdar://problem/9125151> indicates that it might have been destroyed during painting.
layerContents = platformLayer->owner();
ASSERT(layerContents);
if (layerContents && layerContents->platformCALayerShowRepaintCounter()) {
bool isTiledLayer = [layer isKindOfClass:[CATiledLayer class]];
char text[16]; // that's a lot of repaints
snprintf(text, sizeof(text), "%d", layerContents->platformCALayerIncrementRepaintCount());
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 = layerBounds;
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);
}
CGContextRestoreGState(context);
}
void setLayerNeedsDisplayInRect(CALayer *layer, WebCore::PlatformCALayerClient* layerContents, CGRect rect)
{
if (layerContents && layerContents->platformCALayerDrawsContent()) {
struct objc_super layerSuper = { layer, class_getSuperclass(object_getClass(layer)) };
#if defined(BUILDING_ON_LEOPARD)
rect = CGRectApplyAffineTransform(rect, [layer contentsTransform]);
#else
if (layerContents->platformCALayerContentsOrientation() == WebCore::GraphicsLayer::CompositingCoordinatesBottomUp)
rect.origin.y = [layer bounds].size.height - rect.origin.y - rect.size.height;
#endif
objc_msgSendSuper(&layerSuper, @selector(setNeedsDisplayInRect:), rect);
#ifndef NDEBUG
if (layerContents->platformCALayerShowRepaintCounter()) {
CGRect bounds = [layer bounds];
CGRect indicatorRect = CGRectMake(bounds.origin.x, bounds.origin.y, 46, 25);
#if defined(BUILDING_ON_LEOPARD)
indicatorRect = CGRectApplyAffineTransform(indicatorRect, [layer contentsTransform]);
#else
if (layerContents->platformCALayerContentsOrientation() == WebCore::GraphicsLayer::CompositingCoordinatesBottomUp)
indicatorRect.origin.y = [layer bounds].size.height - indicatorRect.origin.y - indicatorRect.size.height;
#endif
objc_msgSendSuper(&layerSuper, @selector(setNeedsDisplayInRect:), indicatorRect);
}
#endif
}
}
// Disable default animations
- (id<CAAction>)actionForKey:(NSString *)key
{
UNUSED_PARAM(key);
return nil;
}
- (void)setNeedsDisplay
{
PlatformCALayer* layer = PlatformCALayer::platformCALayer(self);
if (layer && layer->owner() && layer->owner()->platformCALayerDrawsContent())
[super setNeedsDisplay];
}
- (void)setNeedsDisplayInRect:(CGRect)dirtyRect
{
PlatformCALayer* layer = PlatformCALayer::platformCALayer(self);
if (layer)
setLayerNeedsDisplayInRect(self, layer->owner(), dirtyRect);
}
- (void)display
{
[super display];
PlatformCALayer* layer = PlatformCALayer::platformCALayer(self);
if (layer && layer->owner())
layer->owner()->platformCALayerLayerDidDisplay(self);
}
- (void)drawInContext:(CGContextRef)context
{
PlatformCALayer* layer = PlatformCALayer::platformCALayer(self);
if (layer)
drawLayerContents(context, self, layer);
}
@end // implementation WebLayer
// MARK: -
#ifndef NDEBUG
@implementation CALayer(ExtendedDescription)
- (NSString*)_descriptionWithPrefix:(NSString*)inPrefix
{
CGRect aBounds = [self bounds];
CGPoint aPos = [self position];
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)