/*

File: BrickShader.m

Abstract: Brick Shader Exhibit

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 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

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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

 THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS

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 OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.

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*/

#import "BrickShader.h"

@implementation BrickShader

- (id) init

{

    [super init];

    return self;

}

- (void) initLazy

{

    [super initLazy];

    /* Setup GLSL */

   {

      NSBundle *bundle;

      NSString *vertex_string, *fragment_string;

      bundle = [NSBundle bundleForClass: [self class]];

        /* Load vertex and fragment shader */

      vertex_string   = [bundle pathForResource: @"BrickShader" ofType: @"vertex"];

      vertex_string   = [NSString stringWithContentsOfFile: vertex_string];

      fragment_string = [bundle pathForResource: @"BrickShader" ofType: @"fragment"];

      fragment_string = [NSString stringWithContentsOfFile: fragment_string];

        if ([self loadVertexShader: vertex_string fragmentShader: fragment_string])

            NSLog(@"Failed to load brick shader");

        /* Setup uniforms */

        glUseProgramObjectARB(program_object);

        glUniform3fARB(glGetUniformLocationARB(program_object, "BrickColor"), 0.7, 0.1, 0.0);

        glUniform3fARB(glGetUniformLocationARB(program_object, "MortarColor"), 0.85, 0.86, 0.84);

        glUniform3fARB(glGetUniformLocationARB(program_object, "LightPosition"), 0.0, 1.0, 1.0);

        glUniform2fARB(glGetUniformLocationARB(program_object, "BrickSize"), 0.30, 0.15);

        glUniform2fARB(glGetUniformLocationARB(program_object, "BrickPct"), 0.90, 0.85);        

    }

}

- (void) dealloc

{

    [super dealloc];

}

- (NSString *) name

{

    return @"Brick Shader";

}

- (NSString *) descriptionFilename

{

    NSBundle *bundle;

    NSString *string;

    bundle = [NSBundle bundleForClass: [self class]];

   string = [bundle pathForResource: @"BrickShader" ofType: @"rtf"];

    return string;

}

- (void) renderFrame

{

    [super renderFrame];

    glUseProgramObjectARB(program_object);

    glBegin(GL_QUADS);

    glNormal3f(0.0, 0.0, 1.0);

    glVertex2f(-0.5, -0.5);

    glVertex2f( 0.5, -0.5);

    glVertex2f( 0.5,  0.5);

    glVertex2f(-0.5,  0.5);

    glEnd();

    glUseProgramObjectARB(NULL);

}

@end