/*
  Copyright (c) 2004-2007, Marcus Müller <znek@mulle-kybernetik.com>.
  Copyright (c) 2006, Michael Maier <micha@mulle-kybernetik.com>.
  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.

  - Neither the name of Mulle kybernetiK nor the names of its contributors
  may be used to endorse or promote products derived from this software
  without specific prior written permission.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT OWNER OR CONTRIBUTORS 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.
*/

#include "common.h"
#include "QuartzCView.h"
#include "Watchdog.h"
#include "RendererChain.h"
#include "NSImage+Extensions.h"

@interface QuartzCView (Private)
- (void)ensureChainExists;
- (void)flushBufferedImage;
@end

@implementation QuartzCView

- (void)dealloc {
  [[Watchdog sharedWatchdog] forgetEffectsOfQuartzCView:self];
  [self->chain         release];
  [self->qtzFilePaths  release];
  [self->auxInputImage release];
  [self->bufferedImage release];
  [super dealloc];
}

/**
* We use the focused view for rendering => NO
 */
- (BOOL)useOpenGLForDrawing {
  return NO;
}

- (QCRenderer *)rendererWithQtzFilePath:(NSString *)_qtzPath {
  return [[QCRenderer alloc] initWithOpenGLContext:self->context 
                             pixelFormat:self->pixelFormat
                             file:_qtzPath];
}

- (NSArray *)qtzFilePaths {
  return self->qtzFilePaths;
}

- (void)setQtzFilePaths:(NSArray *)_paths {
  [self flushBufferedImage];
  [[Watchdog sharedWatchdog] forgetEffectsOfQuartzCView:self];

  if (!self->qtzFilePaths)
    self->qtzFilePaths = [[NSMutableArray alloc] initWithCapacity:3];
  else
    [self->qtzFilePaths removeAllObjects];

  [self->qtzFilePaths addObjectsFromArray:_paths];
  [self reloadRendererChain];

  [[Watchdog sharedWatchdog] watchEffectsOfQuartzCView:self];
}

- (void)ensureChainExists {
  if (!self->chain && self->context) {
    self->chain = [[RendererChain alloc] init];
    [self->chain setShouldFlipImage:[self shouldFlipImage]];
  }
}

- (void)initRendererChain {
  QCRenderer *renderer;
  NSString   *path;
  unsigned   i, count;

  if (!self->context) return;

  [self ensureChainExists];
  if ([self->chain rendererCount] == 0) {
    path     = [[NSBundle mainBundle] pathForResource:@"_Pre" ofType:@"qtz"];
    renderer = [self rendererWithQtzFilePath:path];
    NSAssert(renderer != nil, @"Couldn't get _Pre.qtz!!!");
    [self->chain appendRenderer:renderer];
    [renderer release];
  }
  
  for (i = 0, count = [self->qtzFilePaths count]; i < count; i++) {    
    path     = [self->qtzFilePaths objectAtIndex:i];
    renderer = [self rendererWithQtzFilePath:path];
    [self->chain appendRenderer:renderer];
    [renderer release];
  }
}

- (void)disposeRendererChain {
  [self->chain removeCustomRenderers];
}

- (void)reloadRendererChain {
  [self disposeRendererChain];
  [self initRendererChain];
}

- (void)flushBufferedImage {
  [self->bufferedImage release];
  self->bufferedImage = nil;
}

- (NSImage *)originalImage {
  return (NSImage *)[self->chain input];
}

- (BOOL)hasAuxiliaryInputImage {
  return self->auxInputImage ? YES : NO;
}

- (void)setAuxiliaryInputImage:(NSImage *)_img {
  [self flushBufferedImage];
  [self->auxInputImage release];
  if (_img != nil) {
    NSBitmapImageRep *rep;

    rep = [NSBitmapImageRep imageRepWithData:[_img TIFFRepresentation]];
    
    self->auxInputImage = [[CIImage alloc] initWithBitmapImageRep:rep];
    [self stopVideo:self];
  }
  else {
    self->auxInputImage = nil;
    [self startVideo:self];
  }
}


/* Overriding */

- (void)setShouldFlipImage:(BOOL)_yn {
  [super setShouldFlipImage:_yn];
  [self ensureChainExists];
  [self->chain setShouldFlipImage:_yn];
  [self flushBufferedImage];
}

- (void)openGLdrawRect:(NSRect)rect {
  [self ensureChainExists];
  if ([self->chain rendererCount] == 0)
    [self initRendererChain];
    
  if( ![self useOpenGLForDrawing] ) {
    if (self->currentFrame || self->auxInputImage || self->bufferedImage) {
      CIImage	*input, *output;
      CGRect  imageRect;
      NSRect  destRect;

      if (self->auxInputImage)
        input = self->auxInputImage;
      else
        input = [CIImage imageWithCVImageBuffer:self->currentFrame];

      imageRect = [input extent];
      destRect  = NSMakeRect(0.0,
                             0.0,
                             imageRect.size.width,
                             imageRect.size.height);
      if (self->bufferedImage)
        output = self->bufferedImage;
      else
        output = [self->chain imageByRenderingImage:input];
      [output drawInRect:rect
              fromRect:destRect
              operation:NSCompositeCopy
              fraction:1];
      if (self->auxInputImage && !self->bufferedImage)
        self->bufferedImage = [output retain];
    }
  }
}

- (NSImage *)imageFromRect:(NSRect)_r {
  NSImage *si, *di;
  
  di = [[NSImage alloc] initWithSize:_r.size];
  si = (NSImage *)[self->chain output];
  si = [si scaledImageWithSize:[self bounds].size];

  [di lockFocus];
  [si compositeToPoint:NSZeroPoint fromRect:_r operation:NSCompositeCopy];
  [di unlockFocus];
  return [di autorelease];
}

@end /* QuartzCView */