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Diffstat (limited to 'AppKit/GTMNSBezierPath+Shading.m')
| -rw-r--r-- | AppKit/GTMNSBezierPath+Shading.m | 216 |
1 files changed, 0 insertions, 216 deletions
diff --git a/AppKit/GTMNSBezierPath+Shading.m b/AppKit/GTMNSBezierPath+Shading.m deleted file mode 100644 index 5e65b14..0000000 --- a/AppKit/GTMNSBezierPath+Shading.m +++ /dev/null @@ -1,216 +0,0 @@ -// -// GTMNSBezierPath+Shading.m -// -// Category for radial and axial stroke and fill functions for NSBezierPaths -// -// Copyright 2006-2008 Google Inc. -// -// Licensed under the Apache License, Version 2.0 (the "License"); you may not -// use this file except in compliance with the License. You may obtain a copy -// of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT -// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the -// License for the specific language governing permissions and limitations under -// the License. -// - -#import "GTMNSBezierPath+Shading.h" -#import "GTMNSBezierPath+CGPath.h" -#import "GTMShading.h" -#import "GTMGeometryUtils.h" -#import "GTMMethodCheck.h" - -@interface NSBezierPath (GTMBezierPathShadingAdditionsPrivate) -// Fills a CGPathRef either axially or radially with the given shading. -// -// Args: -// path: path to fill -// axially: if YES fill axially, otherwise fill radially -// asStroke: if YES, clip to the stroke of the path, otherwise -// clip to the fill -// from: where to shade from -// fromRadius: in a radial fill, the radius of the from circle -// to: where to shade to -// toRadius: in a radial fill, the radius of the to circle -// extendingStart: if true, extend the fill with the first color of the shade -// beyond |from| away from |to| -// extendingEnd: if true, extend the fill with the last color of the shade -// beyond |to| away from |from| -// shading: the shading to use for the fill -// -- (void)gtm_fillCGPath:(CGPathRef)path - axially:(BOOL)axially - asStroke:(BOOL)asStroke - from:(NSPoint)fromPoint fromRadius:(CGFloat)fromRadius - to:(NSPoint)toPoint toRadius:(CGFloat)toRadius - extendingStart:(BOOL)extendingStart extendingEnd:(BOOL)extendingEnd - shading:(id<GTMShading>)shading; - -// Returns the point which is the projection of a line from point |pointA| -// to |pointB| by length -// -// Args: -// pointA: first point -// pointB: second point -// length: distance to project beyond |pointB| which is in line with -// |pointA| and |pointB| -// -// Returns: -// the projected point -- (NSPoint)gtm_projectLineFrom:(NSPoint)pointA - to:(NSPoint)pointB - by:(CGFloat)length; -@end - - -@implementation NSBezierPath (GTMBezierPathAdditionsPrivate) - -- (void)gtm_fillCGPath:(CGPathRef)path - axially:(BOOL)axially asStroke:(BOOL)asStroke - from:(NSPoint)fromPoint fromRadius:(CGFloat)fromRadius - to:(NSPoint)toPoint toRadius:(CGFloat)toRadius - extendingStart:(BOOL)extendingStart extendingEnd:(BOOL)extendingEnd - shading:(id<GTMShading>)shading { - CGFunctionRef shadingFunction = [shading shadeFunction]; - if (nil != shadingFunction) { - CGContextRef currentContext = (CGContextRef)[[NSGraphicsContext currentContext] graphicsPort]; - if (nil != currentContext) { - CGContextSaveGState(currentContext); - CGFloat lineWidth = [self lineWidth]; - CGContextSetLineWidth(currentContext, lineWidth); - if (asStroke) { - // if we are using the stroke, we offset the from and to points - // by half the stroke width away from the center of the stroke. - // Otherwise we tend to end up with fills that only cover half of the - // because users set the start and end points based on the center - // of the stroke. - CGFloat halfWidth = lineWidth * 0.5; - fromPoint = [self gtm_projectLineFrom:toPoint to:fromPoint by:halfWidth]; - toPoint = [self gtm_projectLineFrom:fromPoint to:toPoint by:-halfWidth]; - } - CGColorSpaceRef colorspace = [shading colorSpace]; - if (nil != colorspace) { - CGPoint toCGPoint = {.x = toPoint.x, .y = toPoint.y}; - CGPoint fromCGPoint = {.x = fromPoint.x, .y = fromPoint.y}; - CGShadingRef myCGShading; - if(axially) { - myCGShading = CGShadingCreateAxial(colorspace, fromCGPoint, - toCGPoint, shadingFunction, - extendingStart == YES, - extendingEnd == YES); - } - else { - myCGShading = CGShadingCreateRadial(colorspace, fromCGPoint, fromRadius, - toCGPoint, toRadius, shadingFunction, - extendingStart == YES, - extendingEnd == YES); - } - - if (nil != myCGShading) { - CGContextAddPath(currentContext,path); - if(asStroke) { - CGContextReplacePathWithStrokedPath(currentContext); - } - CGContextClip(currentContext); - CGContextDrawShading(currentContext, myCGShading); - CGShadingRelease(myCGShading); - } - } - CGContextRestoreGState(currentContext); - } - } -} - - -- (NSPoint)gtm_projectLineFrom:(NSPoint)pointA - to:(NSPoint)pointB - by:(CGFloat)length { - NSPoint newPoint = NSMakePoint(pointB.x, pointB.y); - CGFloat x = (pointB.x - pointA.x); - CGFloat y = (pointB.y - pointA.y); - if (fpclassify(x) == FP_ZERO) { - newPoint.y += length; - } else if (fpclassify(y) == FP_ZERO) { - newPoint.x += length; - } else { -#if CGFLOAT_IS_DOUBLE - CGFloat angle = atan(y / x); - newPoint.x += sin(angle) * length; - newPoint.y += cos(angle) * length; -#else - CGFloat angle = atanf(y / x); - newPoint.x += sinf(angle) * length; - newPoint.y += cosf(angle) * length; -#endif - } - return newPoint; -} - -@end - - -@implementation NSBezierPath (GTMBezierPathShadingAdditions) -GTM_METHOD_CHECK(NSBezierPath, gtm_CGPath); - -- (void)gtm_strokeAxiallyFrom:(NSPoint)fromPoint to:(NSPoint)toPoint - extendingStart:(BOOL)extendingStart extendingEnd:(BOOL)extendingEnd - shading:(id<GTMShading>)shading { - CGPathRef thePath = [self gtm_CGPath]; - if (nil != thePath) { - [self gtm_fillCGPath:thePath axially:YES asStroke:YES - from:fromPoint fromRadius:(CGFloat)0.0 - to:toPoint toRadius:(CGFloat)0.0 - extendingStart:extendingStart extendingEnd:extendingEnd - shading:shading]; - } -} - - -- (void)gtm_strokeRadiallyFrom:(NSPoint)fromPoint fromRadius:(CGFloat)fromRadius - to:(NSPoint)toPoint toRadius:(CGFloat)toRadius - extendingStart:(BOOL)extendingStart extendingEnd:(BOOL)extendingEnd - shading:(id<GTMShading>)shading { - CGPathRef thePath = [self gtm_CGPath]; - if (nil != thePath) { - [self gtm_fillCGPath:thePath axially:NO asStroke:YES - from:fromPoint fromRadius:fromRadius - to:toPoint toRadius:toRadius - extendingStart:extendingStart extendingEnd:extendingEnd - shading:shading]; - } -} - - -- (void)gtm_fillAxiallyFrom:(NSPoint)fromPoint to:(NSPoint)toPoint - extendingStart:(BOOL)extendingStart extendingEnd:(BOOL)extendingEnd - shading:(id<GTMShading>)shading { - CGPathRef thePath = [self gtm_CGPath]; - if (nil != thePath) { - [self gtm_fillCGPath:thePath axially:YES asStroke:NO - from:fromPoint fromRadius:(CGFloat)0.0 - to:toPoint toRadius:(CGFloat)0.0 - extendingStart:extendingStart extendingEnd:extendingEnd - shading:shading]; - } -} - - -- (void)gtm_fillRadiallyFrom:(NSPoint)fromPoint fromRadius:(CGFloat)fromRadius - to:(NSPoint)toPoint toRadius:(CGFloat)toRadius - extendingStart:(BOOL)extendingStart extendingEnd:(BOOL)extendingEnd - shading:(id<GTMShading>)shading { - CGPathRef thePath = [self gtm_CGPath]; - if (nil != thePath) { - [self gtm_fillCGPath:thePath axially:NO asStroke:NO - from:fromPoint fromRadius:fromRadius - to:toPoint toRadius:toRadius - extendingStart:extendingStart extendingEnd:extendingEnd - shading:shading]; - } -} - -@end |