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PO
primarykey
Id
7404143
data
AcceptedAnswerId
0
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0
ClosedDate
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1
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CreationDate
2011-09-13T15:06:10.213
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LastActivityDate
2013-03-18T11:54:05.463
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2013-03-18T11:54:05.463
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274249
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274249
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7402504
PostTypeId
2
Score
15
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0
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text
Body
Yes! I found what I was doing wrong. I wrongly thought that I could have the following: Framebuffer <ul> <li>Multisampled colour render buffer attached to a texture</li> <li>Multisampled depth buffer</li> </ul> But you cannot do this. D: You have to have the following: Multisampled framebuffer: <ul> <li>Multisampled colour render buffer (Not attached to a texture)</li> <li>Multisampled depth render buffer</li> </ul> Normal framebuffer: <ul> <li>Colour render buffer attached to a texture. This is what will be written to by glResolveMultisampleFramebufferAPPLE() and what we will use to render the result.</li> <li>No depth buffer.</li> </ul> I.e. you have to copy the results of the multisampled render to a whole new framebuffer. Some code: <pre class="lang-cpp prettyprint-override"><code> glGenTextures(1, &texture); glBindTexture(GL_TEXTURE_2D, texture); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA4, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL); glGenFramebuffers(1, &resolved_framebuffer); glBindFramebuffer(GL_FRAMEBUFFER, resolved_framebuffer); glGenRenderbuffers(1, &resolvedColorRenderbuffer); glBindRenderbuffer(GL_RENDERBUFFER, resolvedColorRenderbuffer); glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, 0); glGenFramebuffers(1, &framebuffer); glBindFramebuffer(GL_FRAMEBUFFER, framebuffer); glGenRenderbuffers(1, &colorRenderbuffer); glBindRenderbuffer(GL_RENDERBUFFER, colorRenderbuffer); glRenderbufferStorageMultisampleAPPLE(GL_RENDERBUFFER, 4, GL_RGBA8_OES, width, height); glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, colorRenderbuffer); glGenRenderbuffers(1, &depthRenderbuffer); glBindRenderbuffer(GL_RENDERBUFFER, depthRenderbuffer); glRenderbufferStorageMultisampleAPPLE(GL_RENDERBUFFER, 4, GL_DEPTH_COMPONENT16, width, height); glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depthRenderbuffer); GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER) ; if(status != GL_FRAMEBUFFER_COMPLETE) { NSLog(@"failed to make complete framebuffer object %x", status); } // Render my scene glBindFramebuffer( GL_FRAMEBUFFER, framebuffer ); glViewport(0,0,width,height); glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); // Draw scene // Then bind default framebuffer glBindFramebuffer( GL_FRAMEBUFFER, 1 ); // Draw other things // Now resolve the multisampling into the other fbo glBindFramebuffer( GL_READ_FRAMEBUFFER_APPLE, framebuffer ); glBindFramebuffer( GL_DRAW_FRAMEBUFFER_APPLE, resolved_framebuffer ); glResolveMultisampleFramebufferAPPLE(); glBindTexture( GL_TEXTURE_2D, texture ); // Draw with texture </code></pre> Thanks Goz, you got me in the right direction!
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1. POMultisampled render to texture in ios
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