render-to-texture | 易学教程

OpenGL ES Render to Texture

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问题 I have been having trouble finding straightforward code to render a scene to a texture in OpenGL ES (specifically for the iPhone, if that matters). I am interested in knowing the following: How do you render a scene to a texture in OpenGL ES? What parameters must you use to create a texture that is capable of being a render target in OpenGL ES? Are there any implications with applying this rendered texture to other primitives? 回答1: This is how I'm doing it. I define a texture variable (I use

Rendering to non-power-of-two texture on iPhone

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Is it possible to render to texture with OpenGL ES 1.1 on the iPhone (2G and older)? If I bind a texture as a render buffer, it has to be the size of the render buffer, which isn't POT-sized. But OpenGL ES 1.1 requires textures to be POT. Maybe it can't be done on ES 1.1? While OpenGL ES 1.1 does not support non-power-of-two textures, newer iOS device models have the extension GL_APPLE_texture_2D_limited_npot , which states: Conventional OpenGL ES 1.X texturing is limited to images with power-of-two (POT) dimensions. APPLE_texture_2D_limited_npot extension relaxes these size restrictions for

Rendering to non-power-of-two texture on iPhone

阅读更多关于 Rendering to non-power-of-two texture on iPhone

问题 Is it possible to render to texture with OpenGL ES 1.1 on the iPhone (2G and older)? If I bind a texture as a render buffer, it has to be the size of the render buffer, which isn\'t POT-sized. But OpenGL ES 1.1 requires textures to be POT. Maybe it can\'t be done on ES 1.1? 回答1: While OpenGL ES 1.1 does not support non-power-of-two textures, newer iOS device models have the extension GL_APPLE_texture_2D_limited_npot, which states: Conventional OpenGL ES 1.X texturing is limited to images with