Initial commit (version 0.2.1)

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+/*
+ * cocos2d for iPhone: http://www.cocos2d-iphone.org
+ *
+ * Copyright (c) 2009 On-Core
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+
+#import "Platforms/CCGL.h"
+#import "CCGrabber.h"
+#import "ccMacros.h"
+#import "CCTexture2D.h"
+#import "Support/OpenGL_Internal.h"
+
+@implementation CCGrabber
+
+-(id) init
+{
+        if(( self = [super init] )) {
+                // generate FBO
+                ccglGenFramebuffers(1, &fbo);           
+        }
+        return self;
+}
+
+-(void)grab:(CCTexture2D*)texture
+{
+        glGetIntegerv(CC_GL_FRAMEBUFFER_BINDING, &oldFBO);
+        
+        // bind
+        ccglBindFramebuffer(CC_GL_FRAMEBUFFER, fbo);
+
+        // associate texture with FBO
+        ccglFramebufferTexture2D(CC_GL_FRAMEBUFFER, CC_GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture.name, 0);
+        
+        // check if it worked (probably worth doing :) )
+        GLuint status = ccglCheckFramebufferStatus(CC_GL_FRAMEBUFFER);
+        if (status != CC_GL_FRAMEBUFFER_COMPLETE)
+                [NSException raise:@"Frame Grabber" format:@"Could not attach texture to framebuffer"];
+        
+        ccglBindFramebuffer(CC_GL_FRAMEBUFFER, oldFBO);
+}
+
+-(void)beforeRender:(CCTexture2D*)texture
+{
+        glGetIntegerv(CC_GL_FRAMEBUFFER_BINDING, &oldFBO);
+        ccglBindFramebuffer(CC_GL_FRAMEBUFFER, fbo);
+
+        // BUG XXX: doesn't work with RGB565.
+
+
+        glClearColor(0,0,0,0);
+        
+        // BUG #631: To fix #631, uncomment the lines with #631
+        // Warning: But it CCGrabber won't work with 2 effects at the same time
+//      glClearColor(0.0f,0.0f,0.0f,1.0f);      // #631
+        
+        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);     
+        
+//      glColorMask(TRUE, TRUE, TRUE, FALSE);   // #631
+
+}
+
+-(void)afterRender:(CCTexture2D*)texture
+{
+        ccglBindFramebuffer(CC_GL_FRAMEBUFFER, oldFBO);
+//      glColorMask(TRUE, TRUE, TRUE, TRUE);    // #631
+}
+
+- (void) dealloc
+{
+        CCLOGINFO(@"cocos2d: deallocing %@", self);
+        ccglDeleteFramebuffers(1, &fbo);
+        [super dealloc];
+}
+
+@end