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I'm writing some code where all I have access to is a textureID to get access to the required texture. Is there any way that I can get access to the RGB values of this texture so I can perform some computations on it?
EDIT: I am looking for the inverse of glTexSubImage2D. I want to get the texture data rather than replace it.
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in display() function : GLuint texture; texture = LoadTexture("bubble. png"); glBindTexture(GL_TEXTURE_2D, texture);
A Sampler Object is an OpenGL Object that stores the sampling parameters for a Texture access inside of a shader.
OpenGL 3. x defines the minimum number for the per-stage limit to be 16, so hardware cannot have fewer than 16 textures-per-stage.
You are probably looking for glGetTexImage
Before using glGetTexImage, don't forget to use glBindTexture with your texture ID.
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