diff options
Diffstat (limited to 'Frameworks/PSMTabBar/NSBezierPath_AMShading.m')
| -rwxr-xr-x | Frameworks/PSMTabBar/NSBezierPath_AMShading.m | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/Frameworks/PSMTabBar/NSBezierPath_AMShading.m b/Frameworks/PSMTabBar/NSBezierPath_AMShading.m new file mode 100755 index 00000000..73213f3b --- /dev/null +++ b/Frameworks/PSMTabBar/NSBezierPath_AMShading.m @@ -0,0 +1,127 @@ +// +// NSBezierPath_AMShading.m +// ------------------------ +// +// Created by Andreas on 2005-06-01. +// Copyright 2005 Andreas Mayer. All rights reserved. +// + +#import "NSBezierPath_AMShading.h" + + +@implementation NSBezierPath (AMShading) + +static void linearShadedColor(void *info, const CGFloat *in, CGFloat *out) +{ + CGFloat *colors = (CGFloat *)info; + *out++ = colors[0] + *in * colors[8]; + *out++ = colors[1] + *in * colors[9]; + *out++ = colors[2] + *in * colors[10]; + *out++ = colors[3] + *in * colors[11]; +} + +static void bilinearShadedColor(void *info, const CGFloat *in, CGFloat *out) +{ + CGFloat *colors = (CGFloat *)info; + CGFloat factor = (*in)*2.0; + if (*in > 0.5) { + factor = 2-factor; + } + *out++ = colors[0] + factor * colors[8]; + *out++ = colors[1] + factor * colors[9]; + *out++ = colors[2] + factor * colors[10]; + *out++ = colors[3] + factor * colors[11]; +} + +- (void)linearGradientFillWithStartColor:(NSColor *)startColor endColor:(NSColor *)endColor +{ + static const CGFunctionCallbacks callbacks = {0, &linearShadedColor, NULL}; + + [self customHorizontalFillWithCallbacks:callbacks firstColor:startColor secondColor:endColor]; +} + +- (void)linearVerticalGradientFillWithStartColor:(NSColor *)startColor endColor:(NSColor *)endColor +{ + static const CGFunctionCallbacks callbacks = {0, &linearShadedColor, NULL}; + + [self customVerticalFillWithCallbacks:callbacks firstColor:startColor secondColor:endColor]; +} + +- (void)bilinearGradientFillWithOuterColor:(NSColor *)outerColor innerColor:(NSColor *)innerColor +{ + static const CGFunctionCallbacks callbacks = {0, &bilinearShadedColor, NULL}; + + [self customHorizontalFillWithCallbacks:callbacks firstColor:innerColor secondColor:outerColor]; +} + +- (void)customFillWithCallbacks:(CGFunctionCallbacks)functionCallbacks firstColor:(NSColor *)firstColor secondColor:(NSColor *)secondColor startPoint:(CGPoint)startPoint endPoint:(CGPoint)endPoint +{ + CGColorSpaceRef colorspace; + CGShadingRef shading; + CGFunctionRef function; + CGFloat colors[12]; // pointer to color values + + // get my context + CGContextRef currentContext = (CGContextRef)[[NSGraphicsContext currentContext] graphicsPort]; + + NSColor *deviceDependentFirstColor = [firstColor colorUsingColorSpaceName:NSDeviceRGBColorSpace]; + NSColor *deviceDependentSecondColor = [secondColor colorUsingColorSpaceName:NSDeviceRGBColorSpace]; + + // set up colors for gradient + colors[0] = [deviceDependentFirstColor redComponent]; + colors[1] = [deviceDependentFirstColor greenComponent]; + colors[2] = [deviceDependentFirstColor blueComponent]; + colors[3] = [deviceDependentFirstColor alphaComponent]; + + colors[4] = [deviceDependentSecondColor redComponent]; + colors[5] = [deviceDependentSecondColor greenComponent]; + colors[6] = [deviceDependentSecondColor blueComponent]; + colors[7] = [deviceDependentSecondColor alphaComponent]; + + // difference between start and end color for each color components + colors[8] = (colors[4]-colors[0]); + colors[9] = (colors[5]-colors[1]); + colors[10] = (colors[6]-colors[2]); + colors[11] = (colors[7]-colors[3]); + + // draw gradient + colorspace = CGColorSpaceCreateDeviceRGB(); + size_t components = 1 + CGColorSpaceGetNumberOfComponents(colorspace); + static const CGFloat domain[2] = {0.0, 1.0}; + static const CGFloat range[10] = {0, 1, 0, 1, 0, 1, 0, 1, 0, 1}; + //static const CGFunctionCallbacks callbacks = {0, &bilinearShadedColor, NULL}; + + // Create a CGFunctionRef that describes a function taking 1 input and kChannelsPerColor outputs. + function = CGFunctionCreate(colors, 1, domain, components, range, &functionCallbacks); + + shading = CGShadingCreateAxial(colorspace, startPoint, endPoint, function, NO, NO); + + CGContextSaveGState(currentContext); + [self addClip]; + CGContextDrawShading(currentContext, shading); + CGContextRestoreGState(currentContext); + + CGShadingRelease(shading); + CGFunctionRelease(function); + CGColorSpaceRelease(colorspace); +} + +- (void)customHorizontalFillWithCallbacks:(CGFunctionCallbacks)functionCallbacks firstColor:(NSColor *)firstColor secondColor:(NSColor *)secondColor +{ + [self customFillWithCallbacks:functionCallbacks + firstColor:firstColor + secondColor:secondColor + startPoint:CGPointMake(0, NSMinY([self bounds])) + endPoint:CGPointMake(0, NSMaxY([self bounds]))]; +} + +- (void)customVerticalFillWithCallbacks:(CGFunctionCallbacks)functionCallbacks firstColor:(NSColor *)firstColor secondColor:(NSColor *)secondColor +{ + [self customFillWithCallbacks:functionCallbacks + firstColor:firstColor + secondColor:secondColor + startPoint:CGPointMake(NSMinX([self bounds]), 0) + endPoint:CGPointMake(NSMaxX([self bounds]), 0)]; +} + +@end |