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/* This code is based on Apple's "GeekGameBoard" sample code, version 1.0.
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http://developer.apple.com/samplecode/GeekGameBoard/
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Copyright © 2007 Apple Inc. Copyright © 2008 Jens Alfke. All Rights Reserved.
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Redistribution and use in source and binary forms, with or without modification, are permitted
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provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this list of conditions
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and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice, this list of
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conditions and the following disclaimer in the documentation and/or other materials provided
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with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRI-
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BUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#import "GGBLayer.h"
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/** Constants for various commonly used colors. */
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extern CGColorRef kBlackColor, kWhiteColor,
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kTranslucentGrayColor, kTranslucentLightGrayColor,
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kTranslucentWhiteColor, kAlmostInvisibleWhiteColor,
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kHighlightColor;
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#if TARGET_OS_IPHONE
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// These don't exist on iPhone, so I implement them:
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CGColorRef CreateGray(CGFloat gray, CGFloat alpha);
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CGColorRef CreateRGB(CGFloat red, CGFloat green, CGFloat blue, CGFloat alpha);
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#else
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#define CreateGray CGColorCreateGenericGray
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#define CreateRGB CGColorCreateGenericRGB
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#endif
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/** Loads an image or pattern file into a CGImage or CGPattern.
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If the name begins with "/", it's interpreted as an absolute filesystem path.
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Otherwise, it's the name of a resource that's looked up in the app bundle.
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The image must exist, or an assertion-failure exception will be raised!
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Loaded images/patterns are cached in memory, so subsequent calls with the same name
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are very fast.
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The caller must NOT release the result, since it's retained in the cache. */
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CGImageRef GetCGImageNamed( NSString *name );
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CGColorRef GetCGPatternNamed( NSString *name );
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#if ! TARGET_OS_IPHONE
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/** Is it possible to read a CGImage from this pasteboard? */
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BOOL CanGetCGImageFromPasteboard( NSPasteboard *pb );
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/** Loads image data from the pasteboard into a CGImage. */
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CGImageRef GetCGImageFromPasteboard( NSPasteboard *pb, id<NSDraggingInfo>dragInfo );
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#endif
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CGImageRef CreateScaledImage( CGImageRef srcImage, CGFloat scale );
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CGImageRef GetScaledImageNamed( NSString *imageName, CGFloat scale );
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/** Creates a CGPattern from a CGImage. Caller must release it. */
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CGPatternRef CreateImagePattern( CGImageRef image );
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/** Creates a CGColor that draws the given CGImage as a pattern. Caller must release it. */
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CGColorRef CreatePatternColor( CGImageRef image );
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/** Returns the alpha value of a single pixel in a CGImage, scaled to a particular size. */
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float GetPixelAlpha( CGImageRef image, CGSize imageSize, CGPoint pt );
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/** Returns the center point of a CGRect. */
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static inline CGPoint GetCGRectCenter( CGRect rect ) {
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return CGPointMake(CGRectGetMidX(rect),CGRectGetMidY(rect));
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}
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void AddRoundRect( CGContextRef ctx, CGRect rect, CGFloat radius );
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