istereo

annotate src/ES2Renderer.m @ 36:834503dcb486

fixed the rotated gui problem
author John Tsiombikas <nuclear@member.fsf.org>
date Fri, 09 Sep 2011 10:25:03 +0300
parents fe1cb1c567cc
children ff055bff6a15
rev   line source
nuclear@30 1 #include <assert.h>
nuclear@0 2 #import "ES2Renderer.h"
nuclear@0 3 #include "istereo.h"
nuclear@0 4
nuclear@0 5 @implementation ES2Renderer
nuclear@0 6
nuclear@0 7 // Create an OpenGL ES 2.0 context
nuclear@0 8 - (id)init
nuclear@0 9 {
nuclear@0 10 if ((self = [super init]))
nuclear@0 11 {
nuclear@0 12 context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
nuclear@0 13
nuclear@0 14 if (!context || ![EAGLContext setCurrentContext:context])
nuclear@0 15 {
nuclear@0 16 [self release];
nuclear@0 17 return nil;
nuclear@0 18 }
nuclear@0 19
nuclear@0 20 // Create default framebuffer object. The backing will be allocated for the current layer in -resizeFromLayer
nuclear@30 21 glGenFramebuffers(1, &fbo);
nuclear@30 22 glBindFramebuffer(GL_FRAMEBUFFER, fbo);
nuclear@30 23
nuclear@30 24 glGenRenderbuffers(1, &rbuf_color);
nuclear@30 25 glBindRenderbuffer(GL_RENDERBUFFER, rbuf_color);
nuclear@30 26 glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, rbuf_color);
nuclear@30 27
nuclear@30 28 glGenRenderbuffers(1, &rbuf_depth);
nuclear@30 29 glBindRenderbuffer(GL_RENDERBUFFER, rbuf_depth);
nuclear@30 30 glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rbuf_depth);
nuclear@30 31 assert(glGetError() == GL_NO_ERROR);
nuclear@12 32
nuclear@0 33 init();
nuclear@0 34 }
nuclear@0 35
nuclear@0 36 return self;
nuclear@0 37 }
nuclear@0 38
nuclear@0 39 - (void)render
nuclear@0 40 {
nuclear@0 41 redraw();
nuclear@0 42 // This application only creates a single default framebuffer which is already bound at this point.
nuclear@0 43 // This call is redundant, but needed if dealing with multiple framebuffers.
nuclear@30 44 //glBindFramebuffer(GL_FRAMEBUFFER, fbo);
nuclear@30 45 //glViewport(0, 0, xsz, ysz);
nuclear@0 46
nuclear@0 47 // This call is redundant, but needed if dealing with multiple renderbuffers.
nuclear@30 48 glBindRenderbuffer(GL_RENDERBUFFER, rbuf_color);
nuclear@0 49 [context presentRenderbuffer:GL_RENDERBUFFER];
nuclear@0 50 }
nuclear@0 51
nuclear@0 52 - (BOOL)resizeFromLayer:(CAEAGLLayer *)layer
nuclear@0 53 {
nuclear@0 54 // Allocate color buffer backing based on the current layer size
nuclear@30 55 glBindRenderbuffer(GL_RENDERBUFFER, rbuf_color);
nuclear@0 56 [context renderbufferStorage:GL_RENDERBUFFER fromDrawable:layer];
nuclear@30 57 glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, &xsz);
nuclear@30 58 glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, &ysz);
nuclear@30 59
nuclear@30 60 glBindRenderbuffer(GL_RENDERBUFFER, rbuf_depth);
nuclear@30 61 glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, xsz, ysz);
nuclear@0 62
nuclear@0 63 if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
nuclear@0 64 {
nuclear@0 65 NSLog(@"Failed to make complete framebuffer object %x", glCheckFramebufferStatus(GL_FRAMEBUFFER));
nuclear@0 66 return NO;
nuclear@0 67 }
nuclear@30 68 assert(glGetError() == GL_NO_ERROR);
nuclear@0 69
nuclear@30 70 reshape(xsz, ysz);
nuclear@12 71
nuclear@0 72 return YES;
nuclear@0 73 }
nuclear@0 74
nuclear@30 75
nuclear@0 76 - (void)dealloc
nuclear@0 77 {
nuclear@0 78 // Tear down GL
nuclear@30 79 if (fbo)
nuclear@0 80 {
nuclear@30 81 glDeleteFramebuffers(1, &fbo);
nuclear@30 82 fbo = 0;
nuclear@0 83 }
nuclear@0 84
nuclear@30 85 if (rbuf_color)
nuclear@0 86 {
nuclear@30 87 glDeleteRenderbuffers(1, &rbuf_color);
nuclear@30 88 rbuf_color = 0;
nuclear@0 89 }
nuclear@0 90
nuclear@0 91 if (program)
nuclear@0 92 {
nuclear@0 93 glDeleteProgram(program);
nuclear@0 94 program = 0;
nuclear@0 95 }
nuclear@0 96
nuclear@0 97 // Tear down context
nuclear@0 98 if ([EAGLContext currentContext] == context)
nuclear@0 99 [EAGLContext setCurrentContext:nil];
nuclear@0 100
nuclear@0 101 [context release];
nuclear@0 102 context = nil;
nuclear@0 103
nuclear@0 104 [super dealloc];
nuclear@0 105 }
nuclear@0 106
nuclear@0 107 @end