/*

        File: AppController.m

    Abstract: View and Controller classes.

     Version: 1.1

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    without specific prior written permission from Apple.  Except as

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    The Apple Software is provided by Apple on an "AS IS" basis.  APPLE

    MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION

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    Copyright (C) 2009 Apple Inc. All Rights Reserved.

*/

#import <OpenGL/gl.h>

#import <OpenGL/CGLMacro.h>

#import "AppController.h"

#define __FLOAT_RENDERING__ 0 //Only activate on supported hardware and this might have rendering artifacts

@implementation AppView

- (BOOL) renderAtTime:(NSTimeInterval)time arguments:(NSDictionary*)arguments

{

    [(AppController*)[NSApp delegate] setRenderTime:time];

    return [super renderAtTime:time arguments:arguments];

}

@end

@implementation AppController

- (id) init

{

    if(self = [super init]) {

        /* Set defaults */

        posterWidth = 1600;

        posterHeight = 900;

        tilingFactor = 4;

    }

    return self;

}

- (void) dealloc

{

    [_compositionPath release];

    [super dealloc];

}

- (void) setRenderTime:(NSTimeInterval)time

{

    _renderTime = time;

}

- (void) windowWillClose:(NSNotification*)notification

{

    [NSApp terminate:self];

}

- (IBAction) loadComposition:(id)sender

{

    NSOpenPanel*                            openPanel = [NSOpenPanel openPanel];

    /* Load user selected composition on the QCView */

    if([openPanel runModalForTypes:[NSArray arrayWithObject:@"qtz"]] == NSFileHandlingPanelOKButton) {

        if(![qcView loadCompositionFromFile:[openPanel filename]])

        NSBeep();

        else {

            [_compositionPath release];

            _compositionPath = [[openPanel filename] copy];

            [qcView startRendering];

        }

    }

}

- (IBAction) exportPoster:(id)sender

{

    NSUInteger                              tileWidth = posterWidth / tilingFactor,

                                            tileHeight = posterHeight / tilingFactor;

    NSSavePanel*                            savePanel = [NSSavePanel savePanel];

    NSOpenGLPixelFormatAttribute            attributes[] = {NSOpenGLPFAAccelerated, NSOpenGLPFAPixelBuffer, NSOpenGLPFADepthSize, 24,

#if __FLOAT_RENDERING__

                                                            NSOpenGLPFAColorSize, 128, NSOpenGLPFAColorFloat,

#else

                                                            NSOpenGLPFAColorSize, 32,

#endif                                                          

                                                            0};

    QCRenderer*                             renderer = nil;

    NSOpenGLContext*                        context = nil;

    NSOpenGLPixelFormat*                    pixelFormat = nil;

    NSOpenGLPixelBuffer*                    pixelBuffer = nil;

    CGContextRef                            bitmapRef = NULL;

    void*                                   bufferPtr = NULL;

    CGColorSpaceRef                         colorSpaceRef = NULL;

    CGLContextObj                           cgl_ctx;

    CGImageRef                              imageRef;

    CGImageDestinationRef                   destinationRef;

    unsigned                                row,

                                            column,

                                            rowBytes;

    NSDictionary*                           properties;

    QCComposition*                          composition;

    /* Make sure we have a composition */

    if(![qcView loadedComposition]) {

        NSBeep();

        return;

    }

    [qcView pauseRendering];

    /* Display the save panel */

#if __FLOAT_RENDERING__

    [savePanel setRequiredFileType:@"tiff"];

#else

    [savePanel setRequiredFileType:@"png"];

#endif

    if([savePanel runModalForDirectory:nil file:@"My Poster"] != NSFileHandlingPanelOKButton) {

        [qcView resumeRendering];

        return;

    }

    /* Get our rendering colorspace */

    colorSpaceRef = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB);

    if(colorSpaceRef == NULL) {

        NSLog(@"Failed creating CGColorSpace");

        goto CleanUp;

    }

    /* Create the OpenGL context */

    pixelFormat = [[NSOpenGLPixelFormat alloc] initWithAttributes:attributes];

    context = [[NSOpenGLContext alloc] initWithFormat:pixelFormat shareContext:nil];

    if(context == nil) {

        NSLog(@"Failed creating NSOpenGLContext");

        goto CleanUp;

    }

    /* Define "cgl_ctx" for CGLMacro.h */

    cgl_ctx = [context CGLContextObj];

    /* Create the rendering pixel buffer and set it as the rendering target for the context */

    pixelBuffer = [[NSOpenGLPixelBuffer alloc] initWithTextureTarget:GL_TEXTURE_RECTANGLE_EXT textureInternalFormat:GL_RGBA textureMaxMipMapLevel:0 pixelsWide:tileWidth pixelsHigh:tileHeight];

    if(pixelBuffer == nil) {

        NSLog(@"Failed creating NSOpenGLPixelBuffer");

        goto CleanUp;

    }

    [context setPixelBuffer:pixelBuffer cubeMapFace:0 mipMapLevel:0 currentVirtualScreen:[context currentVirtualScreen]];

    /* Create the QCRenderer */

    if(composition = [QCComposition compositionWithFile:_compositionPath])

    renderer = [[QCRenderer alloc] initWithCGLContext:[context CGLContextObj] pixelFormat:[pixelFormat CGLPixelFormatObj] colorSpace:colorSpaceRef composition:composition];

    if(renderer == nil) {

        NSLog(@"Failed creating QCRenderer");

        goto CleanUp;

    }

    /* Create bitmap for poster image */

    rowBytes = tilingFactor * tileWidth * 4;

#if __FLOAT_RENDERING__

    rowBytes *= 4;

#endif

    bufferPtr = calloc(1, tilingFactor * tileHeight * rowBytes);

    if(bufferPtr == NULL) {

        NSLog(@"Failed creating buffer");

        goto CleanUp;

    }

#if __FLOAT_RENDERING__

    bitmapRef = CGBitmapContextCreate(bufferPtr, tilingFactor * tileWidth, tilingFactor * tileHeight, 32, rowBytes, colorSpaceRef, kCGBitmapFloatComponents | kCGImageAlphaPremultipliedLast);

#else

    bitmapRef = CGBitmapContextCreate(bufferPtr, tilingFactor * tileWidth, tilingFactor * tileHeight, 8, rowBytes, colorSpaceRef, kCGImageAlphaPremultipliedLast);

#endif

    if(bitmapRef == NULL) {

        NSLog(@"Failed creating CGBitmapContext");

        goto CleanUp;

    }

    /* Render tiles and assemble poster image - NOTE: So that aspect ratio if properly preserved when rendering we need to have the same number of tiles vertically and horizontally */

    for(row = 0; row < tilingFactor; ++row) {

        for(column = 0; column < tilingFactor; ++column) {

            /* Configure projection matrix to zoom on current tile */

            glMatrixMode(GL_PROJECTION);

            glLoadIdentity();

            glPushMatrix();

            glTranslatef((GLfloat)(tilingFactor - column - 1) * 2.0 - (GLfloat)tilingFactor + 1.0, (GLfloat)(tilingFactor - row - 1) * 2.0 - (GLfloat)tilingFactor + 1.0, 0.0);

            glScalef((GLfloat)tilingFactor, (GLfloat)tilingFactor, 1.0);

            /* Render tile */

            if(![renderer renderAtTime:_renderTime arguments:nil]) {

                NSLog(@"QCRenderer failed rendering at time %f", _renderTime);

                goto CleanUp;

            }

            /* Restore projection matrix */

            glMatrixMode(GL_PROJECTION);

            glPopMatrix();

            /* Grab tile as image */

            imageRef = (CGImageRef)[renderer createSnapshotImageOfType:@"CGImage"];

            if(imageRef == NULL) {

                NSLog(@"Failed retrieving image at time %f", _renderTime);

                goto CleanUp;

            }

            /* Draw image in context */

            CGContextDrawImage(bitmapRef, CGRectMake(column * tileWidth, row * tileHeight, tileWidth, tileHeight), imageRef);

            CGImageRelease(imageRef);

        }

    }

    /* Save poster image */

    if(imageRef = CGBitmapContextCreateImage(bitmapRef)) {

#if __FLOAT_RENDERING__

        properties = [NSDictionary dictionaryWithObject:[NSDictionary dictionaryWithObject:[NSNumber numberWithInt:5] forKey:(NSString*)kCGImagePropertyTIFFCompression] forKey:(NSString*)kCGImagePropertyTIFFDictionary]; //LZW compression

        if(destinationRef = CGImageDestinationCreateWithURL((CFURLRef)[NSURL fileURLWithPath:[savePanel filename]], kUTTypeTIFF, 1, NULL))

#else

        properties = nil;

        if(destinationRef = CGImageDestinationCreateWithURL((CFURLRef)[NSURL fileURLWithPath:[savePanel filename]], kUTTypePNG, 1, NULL))

#endif

        {

            CGImageDestinationAddImage(destinationRef, imageRef, (CFDictionaryRef)properties);

            if(!CGImageDestinationFinalize(destinationRef))

            NSLog(@"CGImageDestinationFinalize() failed");

            CFRelease(destinationRef);

        }

        else

        NSLog(@"Failed creating CGImageDestination");

        CGImageRelease(imageRef);

    }

    else

    NSLog(@"Failed creating image from bitmapRef");

CleanUp:

    /* Clean up */

    CGContextRelease(bitmapRef);

    if(bufferPtr)

    free(bufferPtr);

    [context clearDrawable];

    [pixelBuffer release];

    [renderer release];

    [context release];

    [pixelFormat release];

    CGColorSpaceRelease(colorSpaceRef);

    [qcView resumeRendering];

}

@end