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KDXGraphicsUtility.c
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74 lines (65 loc) * 3.13 KB
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/* vim: set ft=c fenc=utf-8 sw=4 ts=4 et: */
/*
* Copyright (c) 2013 Chongyu Zhu
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#import "KDXGraphicsUtility.h"
CF_RETURNS_RETAINED CGPathRef KDXCreatePathForRoundedRect(CGRect bounds, CGFloat radius)
{
CGMutablePathRef path = CGPathCreateMutable();
CGPathMoveToPoint(path, NULL, CGRectGetMinX(bounds), CGRectGetMinY(bounds) + radius);
CGPathAddLineToPoint(path, NULL, CGRectGetMinX(bounds), CGRectGetMaxY(bounds) - radius);
CGPathAddArc(path, NULL, CGRectGetMinX(bounds) + radius, CGRectGetMaxY(bounds) - radius, radius, M_PI, M_PI / 2.0f, true);
CGPathAddLineToPoint(path, NULL, CGRectGetMaxX(bounds) - radius, CGRectGetMaxY(bounds));
CGPathAddArc(path, NULL, CGRectGetMaxX(bounds) - radius, CGRectGetMaxY(bounds) - radius, radius, M_PI / 2.0f, 0.0f, true);
CGPathAddLineToPoint(path, NULL, CGRectGetMaxX(bounds), CGRectGetMinY(bounds) + radius);
CGPathAddArc(path, NULL, CGRectGetMaxX(bounds) - radius, CGRectGetMinY(bounds) + radius, radius, 0.0f, -M_PI / 2.0f, true);
CGPathAddLineToPoint(path, NULL, CGRectGetMinX(bounds) + radius, CGRectGetMinY(bounds));
CGPathAddArc(path, NULL, CGRectGetMinX(bounds) + radius, CGRectGetMinY(bounds) + radius, radius, -M_PI / 2.0f, M_PI, true);
CGPathCloseSubpath(path);
return path;
}
void KDXAddRoundedRect(CGContextRef context, CGRect bounds, CGFloat radius)
{
CGPathRef path = KDXCreatePathForRoundedRect(bounds, radius);
CGContextAddPath(context, path);
CGPathRelease(path);
}
void KDXClipToRoundedRect(CGContextRef context, CGRect bounds, CGFloat radius)
{
KDXAddRoundedRect(context, bounds, radius);
CGContextClip(context);
}
void KDXFillRoundedRect(CGContextRef context, CGRect bounds, CGFloat radius)
{
KDXAddRoundedRect(context, bounds, radius);
CGContextFillPath(context);
}
void KDXStrokeRoundedRect(CGContextRef context, CGRect bounds, CGFloat radius)
{
KDXAddRoundedRect(context, bounds, radius);
CGContextStrokePath(context);
}
void KDXFlipContext(CGContextRef context, CGRect bounds)
{
CGContextTranslateCTM(context, 0.0f, bounds.size.height);
CGContextScaleCTM(context, 1.0f, -1.0f);
}