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/*Copyright (c) 2010, Zachary Schneirov. All rights reserved.
This file is part of Notational Velocity.
Notational Velocity is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Notational Velocity is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Notational Velocity. If not, see <http://www.gnu.org/licenses/>. */
#import "LinearDividerShader.h"
static void ColorBlendFunction(void *info, const CGFloat *in, CGFloat *out);
@implementation LinearDividerShader
- (id)initWithStartColor:(NSColor*)start endColor:(NSColor*)end {
if ((self = [super init])) {
colorSpaceRef = CGColorSpaceCreateDeviceRGB();
[[start colorUsingColorSpaceName:NSDeviceRGBColorSpace] getRed: &colors.firstColor.redComp green:&colors.firstColor.greenComp
blue:&colors.firstColor.blueComp alpha:&colors.firstColor.alphaComp];
[[end colorUsingColorSpaceName:NSDeviceRGBColorSpace] getRed: &colors.secondColor.redComp green:&colors.secondColor.greenComp
blue:&colors.secondColor.blueComp alpha:&colors.secondColor.alphaComp];
static const CGFloat validIntervals[8] = { 0.0, 1.0, 0.0, 1.0, 0.0, 1.0, 0.0, 1.0 };
static const CGFunctionCallbacks cgFunctionCallbacks = { 0, &ColorBlendFunction, nil };
axialShadingFunction = CGFunctionCreate(&colors, 1, validIntervals, 4, validIntervals, &cgFunctionCallbacks);
dimpleImage = [[NSImage alloc] initWithContentsOfFile:[[NSBundle mainBundle] pathForImageResource:@"SplitViewDimple.tif"]];
}
return self;
}
- (void)dealloc {
CGFunctionRelease(axialShadingFunction);
CGColorSpaceRelease(colorSpaceRef);
[dimpleImage release];
[super dealloc];
}
- (void)drawDividerInRect:(NSRect)aRect withDimpleRect:(NSRect)dimpleRect blendVertically:(BOOL)v {
CGShadingRef cgShading = CGShadingCreateAxial(colorSpaceRef, CGPointMake(aRect.origin.x, aRect.origin.y),
CGPointMake(v ? NSMinX(aRect) : NSMaxX(aRect), v ? NSMaxY(aRect) : NSMinY(aRect)),
axialShadingFunction, NO, NO);
CGContextDrawShading((CGContextRef)[[NSGraphicsContext currentContext] graphicsPort], cgShading);
CGShadingRelease(cgShading);
if (!NSIsEmptyRect(dimpleRect)) {
[dimpleImage drawCenteredInRect:dimpleRect];
}
}
@end
NSRect centeredRectInRect(NSRect rect, NSSize size) {
NSRect centerRect;
centerRect.size = size;
centerRect.origin = NSMakePoint((rect.size.width - size.width) / 2.0,
(rect.size.height - size.height) / 2.0);
centerRect.origin = NSMakePoint(rect.origin.x + centerRect.origin.x, rect.origin.y + centerRect.origin.y);
return centerRect;
}
void ColorBlendFunction(void *info, const CGFloat *in, CGFloat *out) {
ColorSet* colors = (ColorSet *)info;
float inVal = in[0];
unsigned int i;
for (i=0; i<4; i++) out[i] = (1.0 - inVal) * colors->firstColor.channels[i] + inVal * colors->secondColor.channels[i];
}
@implementation NSImage (CenteredDrawing)
- (void)drawCenteredInRect:(NSRect)aRect {
[self drawCenteredInRect:aRect fraction:1.0];
}
- (void)drawCenteredInRect:(NSRect)aRect fraction:(float)aFraction {
NSRect cent = centeredRectInRect(aRect, [self size]);
cent = [[NSView focusView] centerScanRect:cent];
[self compositeToPoint:NSMakePoint(cent.origin.x, cent.origin.y + cent.size.height) operation:NSCompositeSourceOver fraction:aFraction];
}
@end
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