nuclear@30: #include <assert.h>
nuclear@0: #import "ES2Renderer.h"
nuclear@0: #include "istereo.h"
nuclear@0: 
nuclear@0: @implementation ES2Renderer
nuclear@0: 
nuclear@0: // Create an OpenGL ES 2.0 context
nuclear@0: - (id)init
nuclear@0: {
nuclear@0:     if ((self = [super init]))
nuclear@0:     {
nuclear@0:         context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
nuclear@0: 
nuclear@0:         if (!context || ![EAGLContext setCurrentContext:context])
nuclear@0:         {
nuclear@0:             [self release];
nuclear@0:             return nil;
nuclear@0:         }
nuclear@0: 
nuclear@0:         // Create default framebuffer object. The backing will be allocated for the current layer in -resizeFromLayer
nuclear@30:         glGenFramebuffers(1, &fbo);
nuclear@30:         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
nuclear@30: 
nuclear@30:         glGenRenderbuffers(1, &rbuf_color);
nuclear@30:         glBindRenderbuffer(GL_RENDERBUFFER, rbuf_color);
nuclear@30:         glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, rbuf_color);
nuclear@30: 
nuclear@30: 		glGenRenderbuffers(1, &rbuf_depth);
nuclear@30: 		glBindRenderbuffer(GL_RENDERBUFFER, rbuf_depth);
nuclear@30: 		glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rbuf_depth);
nuclear@30: 		assert(glGetError() == GL_NO_ERROR);
nuclear@12: 
nuclear@0: 		init();
nuclear@0:     }
nuclear@0: 
nuclear@0:     return self;
nuclear@0: }
nuclear@0: 
nuclear@0: - (void)render
nuclear@0: {
nuclear@0: 	redraw();
nuclear@0:     // This application only creates a single default framebuffer which is already bound at this point.
nuclear@0:     // This call is redundant, but needed if dealing with multiple framebuffers.
nuclear@30:     //glBindFramebuffer(GL_FRAMEBUFFER, fbo);
nuclear@30:     //glViewport(0, 0, xsz, ysz);
nuclear@0: 
nuclear@0:     // This call is redundant, but needed if dealing with multiple renderbuffers.
nuclear@30:     glBindRenderbuffer(GL_RENDERBUFFER, rbuf_color);
nuclear@0:     [context presentRenderbuffer:GL_RENDERBUFFER];
nuclear@0: }
nuclear@0: 
nuclear@0: - (BOOL)resizeFromLayer:(CAEAGLLayer *)layer
nuclear@0: {
nuclear@0:     // Allocate color buffer backing based on the current layer size
nuclear@30:     glBindRenderbuffer(GL_RENDERBUFFER, rbuf_color);
nuclear@0:     [context renderbufferStorage:GL_RENDERBUFFER fromDrawable:layer];
nuclear@30:     glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, &xsz);
nuclear@30:     glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, &ysz);
nuclear@30: 
nuclear@30: 	glBindRenderbuffer(GL_RENDERBUFFER, rbuf_depth);
nuclear@30: 	glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, xsz, ysz);
nuclear@0: 
nuclear@0:     if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
nuclear@0:     {
nuclear@0:         NSLog(@"Failed to make complete framebuffer object %x", glCheckFramebufferStatus(GL_FRAMEBUFFER));
nuclear@0:         return NO;
nuclear@0:     }
nuclear@30: 	assert(glGetError() == GL_NO_ERROR);
nuclear@0: 
nuclear@30: 	reshape(xsz, ysz);
nuclear@12: 
nuclear@0:     return YES;
nuclear@0: }
nuclear@0: 
nuclear@30: 
nuclear@0: - (void)dealloc
nuclear@0: {
nuclear@0:     // Tear down GL
nuclear@30:     if (fbo)
nuclear@0:     {
nuclear@30:         glDeleteFramebuffers(1, &fbo);
nuclear@30:         fbo = 0;
nuclear@0:     }
nuclear@0: 
nuclear@30:     if (rbuf_color)
nuclear@0:     {
nuclear@30:         glDeleteRenderbuffers(1, &rbuf_color);
nuclear@30:         rbuf_color = 0;
nuclear@0:     }
nuclear@0: 
nuclear@0:     if (program)
nuclear@0:     {
nuclear@0:         glDeleteProgram(program);
nuclear@0:         program = 0;
nuclear@0:     }
nuclear@0: 
nuclear@0:     // Tear down context
nuclear@0:     if ([EAGLContext currentContext] == context)
nuclear@0:         [EAGLContext setCurrentContext:nil];
nuclear@0: 
nuclear@0:     [context release];
nuclear@0:     context = nil;
nuclear@0: 
nuclear@0:     [super dealloc];
nuclear@0: }
nuclear@0: 
nuclear@0: @end