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/* FreeJ
* (c) Copyright 2009 Andrea Guzzo <xant@dyne.org>
*
* This source code is free software; you can redistribute it and/or
* modify it under the terms of the GNU Public License as published
* by the Free Software Foundation; either version 3 of the License,
* or (at your option) any later version.
*
* This source code 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.
* Please refer to the GNU Public License for more details.
*
* You should have received a copy of the GNU Public License along with
* this source code; if not, write to:
* Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#import <CVPreview.h>
#include <QuartzCore/QuartzCore.h>
#include <OpenGL/OpenGL.h>
@implementation CVPreview
- (id)init {
[self setNeedsDisplay:NO];
// Initialization code here.
lock = [[NSRecursiveLock alloc] init];
needsReshape = YES;
texture = nil;
[lock retain];
return self;
}
- (void)awakeFromNib
{
[self init];
}
- (void)dealloc
{
[lock release];
[super dealloc];
}
- (void)drawRect:(NSRect)theRect
{
NSRect frame = [self frame];
NSRect bounds = [self bounds];
@synchronized(self) {
if( kCGLNoError != CGLLockContext((CGLContextObj)[[self openGLContext] CGLContextObj]) )
return;
[[self openGLContext] makeCurrentContext];
if(needsReshape) // if the view has been resized, reset the OpenGL coordinate system
{
GLfloat minX, minY, maxX, maxY;
minX = NSMinX(bounds);
minY = NSMinY(bounds);
maxX = NSMaxX(bounds);
maxY = NSMaxY(bounds);
//[self update];
if(NSIsEmptyRect([self visibleRect]))
{
glViewport(0, 0, 1, 1);
} else {
glViewport(0, 0, frame.size.width ,frame.size.height);
}
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(minX, maxX, minY, maxY, -1.0, 1.0);
glDisable(GL_DITHER);
glDisable(GL_ALPHA_TEST);
glDisable(GL_BLEND);
glDisable(GL_STENCIL_TEST);
glDisable(GL_FOG);
//glDisable(GL_TEXTURE_2D);
glDisable(GL_DEPTH_TEST);
glPixelZoom(1.0,1.0);
// clean the OpenGL context
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
needsReshape = NO;
}
// flush our output to the screen - this will render with the next beamsync
//glFlush();
[[self openGLContext] flushBuffer];
//[super drawRect:theRect];
[self setNeedsDisplay:NO];
CGLUnlockContext((CGLContextObj)[[self openGLContext] CGLContextObj]);
}
}
- (void)update
{
if( kCGLNoError != CGLLockContext((CGLContextObj)[[self openGLContext] CGLContextObj]) )
return;
[super update];
CGLUnlockContext((CGLContextObj)[[self openGLContext] CGLContextObj]);
}
- (void)prepareOpenGL
{
NSAutoreleasePool *pool;
pool = [[NSAutoreleasePool alloc] init];
// Create CGColorSpaceRef
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
// Create CIContext
ciContext = [[CIContext contextWithCGLContext:(CGLContextObj)[[self openGLContext] CGLContextObj]
pixelFormat:(CGLPixelFormatObj)[[self pixelFormat] CGLPixelFormatObj]
options:[NSDictionary dictionaryWithObjectsAndKeys:
(id)colorSpace,kCIContextOutputColorSpace,
(id)colorSpace,kCIContextWorkingColorSpace,nil]] retain];
CGColorSpaceRelease(colorSpace);
[pool release];
}
- (void)renderFrame:(CVTexture *)image
{
NSRect frame = [self frame];
NSRect bounds = [self bounds];
float scaleFactor;
//CVTexture *textureToRelease = nil;
Context *ctx = (Context *)[freej getContext];
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
// if (texture)
// textureToRelease = texture;
texture = image;
@synchronized(self) {
NSAffineTransform *scaleTransform = [NSAffineTransform transform];
scaleFactor = frame.size.height/ctx->screen->geo.h;
[scaleTransform scaleBy:scaleFactor];
CIFilter *scaleFilter = [CIFilter filterWithName:@"CIAffineTransform"];
[scaleFilter setDefaults]; // set the filter to its default values
[scaleFilter setValue:scaleTransform forKey:@"inputTransform"];
[scaleFilter setValue:[texture image] forKey:@"inputImage"];
CIImage *previewImage = [scaleFilter valueForKey:@"outputImage"];
// output the downscaled frame in the preview window
// XXX - I'm not sure we really need locking here
CGRect imageRect = CGRectMake(NSMinX(bounds), NSMinY(bounds),
NSWidth(bounds), NSHeight(bounds));
if( kCGLNoError != CGLLockContext((CGLContextObj)[[self openGLContext] CGLContextObj]) )
return;
CGPoint origin;
origin.x = (frame.size.width-(ctx->screen->geo.w * scaleFactor))/2;
origin.y = (frame.size.height-(ctx->screen->geo.h * scaleFactor))/2;
[ciContext drawImage:previewImage
atPoint: origin
fromRect: imageRect];
//[self drawRect:NSZeroRect];
CGLUnlockContext((CGLContextObj)[[self openGLContext] CGLContextObj]);
[self setNeedsDisplay:YES];
//if (textureToRelease)
// [textureToRelease release];
}
[texture release];
[pool release];
}
- (void)clear
{
needsReshape = YES;
[self drawRect:NSZeroRect];
}
@end
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