ECVAppKitAdditions.m

/* Copyright (c) 2009, Ben Trask
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY BEN TRASK ''AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL BEN TRASK BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
#import "ECVAppKitAdditions.h"
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7
	#import <OpenGL/gl.h>
#endif

// Other Sources
#import "ECVDebug.h"

@implementation NSBezierPath(ECVAppKitAdditions)

#pragma mark -NSBezierPath(ECVAppKitAdditions)

#define ECVNumberOfColorSpaceComponents 4
static void ECVGradientCallback(CGFloat colors[2][ECVNumberOfColorSpaceComponents], CGFloat const x[1], CGFloat y[ECVNumberOfColorSpaceComponents])
{
	NSUInteger i = 0;
	for(; i < ECVNumberOfColorSpaceComponents; i++) y[i] = (1.0f - x[0]) * colors[0][i] + x[0] * colors[1][i];
}
- (void)ECV_fillWithGradientFromColor:(NSColor *)startColor atPoint:(NSPoint)startPoint toColor:(NSColor *)endColor atPoint:(NSPoint)endPoint
{
	NSColorSpace *const colorSpace = [NSColorSpace genericRGBColorSpace];
	CGFloat const domain[] = {0.0f, 1.0f};
	CGFloat const range[ECVNumberOfColorSpaceComponents * 2] = {
		0.0f, 1.0f,
		0.0f, 1.0f,
		0.0f, 1.0f,
		0.0f, 1.0f,
	};
	CGFloat colors[2][ECVNumberOfColorSpaceComponents] = {};
	[[startColor colorUsingColorSpace:colorSpace] getComponents:colors[0]];
	[[endColor colorUsingColorSpace:colorSpace] getComponents:colors[1]];

	[NSGraphicsContext saveGraphicsState];
	[self addClip];
	CGFunctionCallbacks const callbacks = {0, (CGFunctionEvaluateCallback)ECVGradientCallback, NULL};
	CGFunctionRef const function = CGFunctionCreate(colors, 1, domain, ECVNumberOfColorSpaceComponents, range, &callbacks);
	CGShadingRef const shading = CGShadingCreateAxial([colorSpace CGColorSpace], NSPointToCGPoint(startPoint), NSPointToCGPoint(endPoint), function, true, true);
	CGFunctionRelease(function);
	CGContextDrawShading([[NSGraphicsContext currentContext] graphicsPort], shading);
	CGShadingRelease(shading);
	[NSGraphicsContext restoreGraphicsState];
}
- (void)ECV_fillWithHUDButtonGradientWithHighlight:(BOOL)highlight enabled:(BOOL)enabled
{
	NSColor *startColor = nil, *endColor = nil;
	if(highlight) {
		startColor = [NSColor colorWithCalibratedWhite:0.95f alpha:enabled ? 0.8f : 0.4f];
		endColor = [NSColor colorWithCalibratedWhite:0.55f alpha:enabled ? 0.8f : 0.4f];
	} else {
		startColor = [NSColor colorWithCalibratedWhite:0.55f alpha:enabled ? 0.3f : 0.1f];
		endColor = [NSColor colorWithCalibratedWhite:0.1f alpha:enabled ? 0.3f : 0.1f];
	}
	NSRect const b = [self bounds];
	[self ECV_fillWithGradientFromColor:startColor atPoint:NSMakePoint(NSMinX(b), NSMinY(b)) toColor:endColor atPoint:NSMakePoint(NSMinX(b), NSMaxY(b))];
}

@end

@implementation NSBitmapImageRep(ECVAppKitAdditions)

- (GLuint)ECV_textureName
{
	NSParameterAssert([self hasAlpha]);
	NSParameterAssert([self bitsPerSample] == CHAR_BIT);
	NSParameterAssert([self samplesPerPixel] == 4);
	NSParameterAssert([self bytesPerRow] == [self pixelsWide] * [self samplesPerPixel]);
	GLuint textureName = 0;
	ECVGLError(glGenTextures(1, &textureName));
	ECVGLError(glEnable(GL_TEXTURE_RECTANGLE_EXT));
	ECVGLError(glBindTexture(GL_TEXTURE_RECTANGLE_EXT, textureName));
	ECVGLError(glTexImage2D(GL_TEXTURE_RECTANGLE_EXT, 0, GL_RGBA, [self pixelsWide], [self pixelsHigh], 0, GL_RGBA, GL_UNSIGNED_BYTE, [self bitmapData]));
	ECVGLError(glDisable(GL_TEXTURE_RECTANGLE_EXT));
	return textureName;
}

@end

@implementation NSWindowController(ECVAppKitAdditions)

- (IBAction)ECV_toggleWindow:(id)sender
{
	if([[self window] isVisible]) [[self window] performClose:sender];
	else [self showWindow:sender];
}

@end