Re: CIImage and un-explained borders

http://o2creativesolutions.com/outgoing/CoreImageBorderProblem.zip

And this is the source of the main file:

// MyOpenGLView.m

// CI Problem

// Created by Michael Miller on 10/28/07.

#import "MyOpenGLView.h"

#import <Quartz/Quartz.h>

@implementation MyOpenGLView

- (id)initWithFrame:(NSRect)frameRect{

// Pixel Format Attributes for the View-based (non-FullScreen) NSOpenGLContext

NSOpenGLPixelFormatAttribute attrs[] = {

// Specifying "NoRecovery" gives us a context that cannot fall back to the software renderer. This makes the View-based context a compatible with the fullscreen context, enabling us to use the "shareContext" feature to share textures, display lists, and other OpenGL objects between the two.

NSOpenGLPFANoRecovery,

// Attributes Common to FullScreen and non-FullScreen

NSOpenGLPFAColorSize, 24,

NSOpenGLPFADepthSize, 16,

NSOpenGLPFADoubleBuffer,

NSOpenGLPFAAccelerated,

};

// Create our non-FullScreen pixel format.

NSOpenGLPixelFormat* pixelFormat = [[NSOpenGLPixelFormat alloc] initWithAttributes:attrs];

self = [super initWithFrame:frameRect pixelFormat:pixelFormat];

//Set it up to a 1000x1000 ortho

[[self openGLContext] makeCurrentContext];

glMatrixMode (GL_PROJECTION);

glLoadIdentity ();

glOrtho( 0, 1000, 1000, 0, -1, 1);

glMatrixMode (GL_MODELVIEW);

glLoadIdentity ();

//Set the viewport

glViewport(0, 0, [self bounds].size.width, [self bounds].size.height);

//Create CI Context

ciContext = [[CIContext contextWithCGLContext:[[self openGLContext] CGLContextObj] pixelFormat:[[self pixelFormat] CGLPixelFormatObj] options:[NSDictionary dictionaryWithObjectsAndKeys: nil]] retain];

//Read in the image

image = [[CIImage imageWithContentsOfURL: [NSURL fileURLWithPath:[[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"logo.jpg"]]] retain];

return self;

}

- (void) drawRect:(NSRect)aRect

{

//Clear to white

glClearColor( 1.0, 1.0, 1.0, 1.0 );

glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

//Draw the image in this rect

CGRect rect;

rect.origin.x = 500;

rect.origin.y = 500;

rect.size.width = 300;

rect.size.height = 300;

[ciContext drawImage:image inRect:rect fromRect:[image extent]];

//Flush The Buffer

[[self openGLContext] flushBuffer];

}

- (void) reshape

{

glViewport(0, 0, [self bounds].size.width, [self bounds].size.height);

}

@end

Thanks for any help any one can give,

Mike

References:
	>CIImage and un-explained borders (From: Mike Miller <email@hidden>)