/*

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                copyrights in this original Apple software (the "Apple Software"), to use,

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                the Apple Software in its entirety and without modifications, you must retain

                this notice and the following text and disclaimers in all such redistributions of

                the Apple Software.  Neither the name, trademarks, service marks or logos of

                Apple Computer, Inc. may be used to endorse or promote products derived from the

                Apple Software without specific prior written permission from Apple.  Except as

                expressly stated in this notice, no other rights or licenses, express or implied,

                are granted by Apple herein, including but not limited to any patent rights that

                may be infringed by your derivative works or by other works in which the Apple

                Software may be incorporated.

                The Apple Software is provided by Apple on an "AS IS" basis.  APPLE MAKES NO

                WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED

                WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR

                PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN

                COMBINATION WITH YOUR PRODUCTS.

                IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR

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*/

#import <Foundation/Foundation.h>

#import <Appkit/AppKit.h>

#include <OpenGL/gl.h>

#include <OpenGL/glu.h>

#include <OpenGL/glext.h>

#import "GBuffer.h"

#import "CGText.h"

#import "MyOpenGLView.h"

CGPoint mouse_pos;

int mouse_down_count;

const char* font_names[3] =

{

    "Monaco",

    "Times New Roman",

    "LucidaGrande"

};

@implementation MyOpenGLView

- (void) initView

{

    glShadeModel(GL_SMOOTH);

    glDisable(GL_DITHER);

    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

    glCullFace(GL_BACK);

    glEnable(GL_CULL_FACE);

    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);

    glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER,GL_TRUE);

    glLightModeli(GL_LIGHT_MODEL_TWO_SIDE,GL_FALSE);

    {

        GLfloat lightamb[4] = { 0.1, 0.1, 0.1, 1.0 };

        glLightfv(GL_LIGHT0, GL_AMBIENT, lightamb);

    }

    {

        GLfloat lightdif[4] = { 1.0, 1.0, 1.0, 1.0 };

        glLightfv(GL_LIGHT0, GL_DIFFUSE, lightdif);

    }

    glEnable(GL_LIGHT0);

    glDisable(GL_LIGHTING);

    glEnable(GL_NORMALIZE);

    glEnable(GL_TEXTURE_2D);

    glEnable(GL_BLEND);

    glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);

    glStencilMask(GL_FALSE);

    glClearColor(0.0, 0.0, 1.0, 0.0);

    {

        GLint alpha_bits;

        GLint stencil_bits;

        GLint depth_bits;

        glGetIntegerv(GL_ALPHA_BITS, &alpha_bits);

        glGetIntegerv(GL_STENCIL_BITS, &stencil_bits);

        glGetIntegerv(GL_DEPTH_BITS, &depth_bits);

        NSLog(@"Alpha bits  = %d, Stencil bits = %d, Depth bits = %d", alpha_bits, stencil_bits, depth_bits);

    }

    current_font = 0;

    font_size = 12;

    [CGText setFont:font_names[current_font] size: font_size debug: debug];

    processFunc = nil;

}

- (void) processView

{

}

- (void) renderView: (NSRect) view_rect

{

    glClear(GL_COLOR_BUFFER_BIT);

    glMatrixMode(GL_PROJECTION);

    glLoadIdentity();

    gluOrtho2D(view_rect.origin.x, view_rect.origin.x+view_rect.size.width, view_rect.origin.y, view_rect.origin.y+view_rect.size.height);

    glMatrixMode(GL_MODELVIEW);

    if (display_message)

        [CGText displayText:[display_message cString] at: CGPointMake(2, view_rect.size.height-font_size)];

    glFinish();

}

- (void) awakeFromNib

{

    int i;

    [fontList removeItemAtIndex:0];

    for (i = 0; i < 3; i++)

    {

        [fontList addItemWithTitle: [NSString stringWithCString:font_names[i]]];

        [[[fontList itemArray] objectAtIndex:i] setTag:i];

    }

    [fontList  setEnabled:YES];

    [[NSNotificationCenter defaultCenter] addObserver:self

        selector:@selector(textDidEnd:)

        name:NSControlTextDidEndEditingNotification

        object:textField];

    processFunc = @selector(initView);

    debug = NO;

}

- (void) updateFont

{

    [CGText setFont:font_names[current_font] size: font_size debug:debug];

    [self setNeedsDisplay:YES];

}

- (void) drawRect: (NSRect) rect

{

    if (processFunc)

        [self performSelector: processFunc];

    [self processView];

    [self renderView:rect];

}

/* Delegate Events */

- (void) mouseDown: (NSEvent*) theEvent

{

    [self mouseDragged: theEvent];

}

- (void) mouseDragged: (NSEvent*) theEvent

{

    NSPoint pos = [self convertPoint: [theEvent locationInWindow] fromView: [[self window] contentView]];

    mouse_pos.x = pos.x, mouse_pos.y = pos.y;

    mouse_down_count++;

    [self setNeedsDisplay:true];

}

- (void) mouseUp: (NSEvent*) theEvent

{

    mouse_down_count = 0;

}

/* UI Events */

- (IBAction) debug: (id) sender

{

    debug = [sender intValue];

}

- (IBAction) fontSelected:(id)sender

{

    current_font = [[sender selectedItem] tag];

    [self updateFont];

}

- (IBAction) fontSized: (id) sender

{

    font_size = [[sender selectedItem] tag];

    [self updateFont];

}

- (IBAction)setText:(id)sender

{

    [display_message release];

    display_message = [[textField stringValue] retain];

    [self setNeedsDisplay:YES];

}

- (void)textDidEnd:(NSNotification *)notification

{

    [self setText:textField];

}

@end