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    <p>Texture2D, as presented in Crash Landing, isn't ging to work with ES 2.x. It should correctly upload your texture, but the two drawing methods, <code>drawAtPoint:</code> and <code>drawInRect:</code> won't work. They rely on the GL calls glVertexPointer and glTexCoordPointer; neither of those survives into ES 2.x. The logic behind that is that ES 1.x has a fixed pipeline, so it has a defined slot for vertex positions (which you supply with <code>glVertexPointer</code>), a defined slot for texture coordinates (via <code>glTexCoordPointer</code>) and a series of predefined ways in which that data can end up being processed. ES 2.x is fully programmable so it has no need to supply one way for providing vertices, another for providing texture coordinates, a third for colours, etc. It has just one way to supply an attribute for a vertex and it is up to you to specify how that relates to your vertex program, then up to your vertex program to figure out what needs to be processed and passed on to your fragment shader.</p> <p>Really you shouldn't be conflating providing textures and providing geometry anyway. Crash Landing was withdrawn because it suggests poor programming patterns — my personal suspicion is that this was one of them.</p> <p>In addition to not having fixed attributes of a vertex, ES 2.x doesn't supply any fragment shaders. If you want to texture map, you have to write suitable vertex and fragment shaders. The ones in the new GL template do Gouraud shading only if I recall.</p> <p>An additional issue hinted at in the code is that ES 2.x doesn't have a matrix stack. You need to do something yourself about communicating to your vertex shader how it should map from the original vertices to screen locations. I suspect that if you just want to draw a texture as though 2d, that isn't so much of a problem.</p> <p>Probably the correct route forward is:</p> <ul> <li>modify Texture2D so that it can bind the texture it has loaded and remove all attempts to draw it</li> <li>modify the vertex and fragment shader supplied in the GL template to do texturing and modify the buffer you submit so that it has texture coordinates in it</li> <li>then modify the vertex shader so that you can do something other than a sine animation</li> </ul> <p>If you're already happy with ES 1.x, probably a good place to start is <a href="http://www.khronos.org/opengles/sdk/2.0/docs/reference_cards/OpenGL-ES-2_0-Reference-card.pdf" rel="nofollow">the ES 2.x reference sheet</a> and maybe the <a href="http://www.lighthouse3d.com/opengl/glsl/" rel="nofollow">lighthouse3d GLSL tutorial</a> — though that's for desktop OpenGL 2.0. On desktop GL 2.0 there's a lot of support built into GLSL for emulating the old fixed pipeline. None of that is in ES 2.x. But it should at least explain things about attributes, uniforms, samplers, etc. I'm afraid I've yet to come across an ES 2.x focussed tutorial.</p>
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    1. PODisplaying images in open gl es 2.0 on iPhone
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    1. COThanks alot. I'll try to do that and see if it works. I don't think I'm entirely comfortable with ES 1.x, but I suppose it's got to be implemented for iOS3.1 and earlier right?
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    2. COES 1.x is available (and the only thing available) on all devices with a PowerVR MBX GPU — that's the original iPhone, the iPhone 3G and the first two generations of iPod Touch. Both ES 1.x and 2.x are available on all devices with a PowerVR SGX — the iPhone 3GS, iPhone 4, iPad and iPod Touch third and fourth generation. It's all about hardware. Though I think iOS 3.0 will be the first with ES 2.x support just because it launched with the iPhone 3GS.
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