1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/ES1Renderer.m	Tue Sep 06 08:07:14 2011 +0300
     1.3 @@ -0,0 +1,131 @@
     1.4 +//
     1.5 +//  ES1Renderer.m
     1.6 +//  istereo
     1.7 +//
     1.8 +//  Created by nuclear on 9/6/11.
     1.9 +//  Copyright __MyCompanyName__ 2011. All rights reserved.
    1.10 +//
    1.11 +
    1.12 +#import "ES1Renderer.h"
    1.13 +
    1.14 +@implementation ES1Renderer
    1.15 +
    1.16 +// Create an OpenGL ES 1.1 context
    1.17 +- (id)init
    1.18 +{
    1.19 +    if ((self = [super init]))
    1.20 +    {
    1.21 +        context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES1];
    1.22 +
    1.23 +        if (!context || ![EAGLContext setCurrentContext:context])
    1.24 +        {
    1.25 +            [self release];
    1.26 +            return nil;
    1.27 +        }
    1.28 +
    1.29 +        // Create default framebuffer object. The backing will be allocated for the current layer in -resizeFromLayer
    1.30 +        glGenFramebuffersOES(1, &defaultFramebuffer);
    1.31 +        glGenRenderbuffersOES(1, &colorRenderbuffer);
    1.32 +        glBindFramebufferOES(GL_FRAMEBUFFER_OES, defaultFramebuffer);
    1.33 +        glBindRenderbufferOES(GL_RENDERBUFFER_OES, colorRenderbuffer);
    1.34 +        glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, colorRenderbuffer);
    1.35 +    }
    1.36 +
    1.37 +    return self;
    1.38 +}
    1.39 +
    1.40 +- (void)render
    1.41 +{
    1.42 +    // Replace the implementation of this method to do your own custom drawing
    1.43 +
    1.44 +    static const GLfloat squareVertices[] = {
    1.45 +        -0.5f,  -0.33f,
    1.46 +         0.5f,  -0.33f,
    1.47 +        -0.5f,   0.33f,
    1.48 +         0.5f,   0.33f,
    1.49 +    };
    1.50 +
    1.51 +    static const GLubyte squareColors[] = {
    1.52 +        255, 255,   0, 255,
    1.53 +        0,   255, 255, 255,
    1.54 +        0,     0,   0,   0,
    1.55 +        255,   0, 255, 255,
    1.56 +    };
    1.57 +
    1.58 +    static float transY = 0.0f;
    1.59 +
    1.60 +    // This application only creates a single context which is already set current at this point.
    1.61 +    // This call is redundant, but needed if dealing with multiple contexts.
    1.62 +    [EAGLContext setCurrentContext:context];
    1.63 +
    1.64 +    // This application only creates a single default framebuffer which is already bound at this point.
    1.65 +    // This call is redundant, but needed if dealing with multiple framebuffers.
    1.66 +    glBindFramebufferOES(GL_FRAMEBUFFER_OES, defaultFramebuffer);
    1.67 +    glViewport(0, 0, backingWidth, backingHeight);
    1.68 +
    1.69 +    glMatrixMode(GL_PROJECTION);
    1.70 +    glLoadIdentity();
    1.71 +    glMatrixMode(GL_MODELVIEW);
    1.72 +    glLoadIdentity();
    1.73 +    glTranslatef(0.0f, (GLfloat)(sinf(transY)/2.0f), 0.0f);
    1.74 +    transY += 0.075f;
    1.75 +
    1.76 +    glClearColor(0.5f, 0.5f, 0.5f, 1.0f);
    1.77 +    glClear(GL_COLOR_BUFFER_BIT);
    1.78 +
    1.79 +    glVertexPointer(2, GL_FLOAT, 0, squareVertices);
    1.80 +    glEnableClientState(GL_VERTEX_ARRAY);
    1.81 +    glColorPointer(4, GL_UNSIGNED_BYTE, 0, squareColors);
    1.82 +    glEnableClientState(GL_COLOR_ARRAY);
    1.83 +
    1.84 +    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
    1.85 +
    1.86 +    // This application only creates a single color renderbuffer which is already bound at this point.
    1.87 +    // This call is redundant, but needed if dealing with multiple renderbuffers.
    1.88 +    glBindRenderbufferOES(GL_RENDERBUFFER_OES, colorRenderbuffer);
    1.89 +    [context presentRenderbuffer:GL_RENDERBUFFER_OES];
    1.90 +}
    1.91 +
    1.92 +- (BOOL)resizeFromLayer:(CAEAGLLayer *)layer
    1.93 +{	
    1.94 +    // Allocate color buffer backing based on the current layer size
    1.95 +    glBindRenderbufferOES(GL_RENDERBUFFER_OES, colorRenderbuffer);
    1.96 +    [context renderbufferStorage:GL_RENDERBUFFER_OES fromDrawable:layer];
    1.97 +    glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_WIDTH_OES, &backingWidth);
    1.98 +    glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_HEIGHT_OES, &backingHeight);
    1.99 +
   1.100 +    if (glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES) != GL_FRAMEBUFFER_COMPLETE_OES)
   1.101 +    {
   1.102 +        NSLog(@"Failed to make complete framebuffer object %x", glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES));
   1.103 +        return NO;
   1.104 +    }
   1.105 +
   1.106 +    return YES;
   1.107 +}
   1.108 +
   1.109 +- (void)dealloc
   1.110 +{
   1.111 +    // Tear down GL
   1.112 +    if (defaultFramebuffer)
   1.113 +    {
   1.114 +        glDeleteFramebuffersOES(1, &defaultFramebuffer);
   1.115 +        defaultFramebuffer = 0;
   1.116 +    }
   1.117 +
   1.118 +    if (colorRenderbuffer)
   1.119 +    {
   1.120 +        glDeleteRenderbuffersOES(1, &colorRenderbuffer);
   1.121 +        colorRenderbuffer = 0;
   1.122 +    }
   1.123 +
   1.124 +    // Tear down context
   1.125 +    if ([EAGLContext currentContext] == context)
   1.126 +        [EAGLContext setCurrentContext:nil];
   1.127 +
   1.128 +    [context release];
   1.129 +    context = nil;
   1.130 +
   1.131 +    [super dealloc];
   1.132 +}
   1.133 +
   1.134 +@end