I am using the OpenGL ES 2.0 GLSL functionality to manipulate images. What I want to achieve is to select a specific Level Of Detail (LOD) when fetching a sample from a texture from within a fragme...

I am making 2D sprite engine in OpenGL and I want to disable mipmaps, as I do not need them. When I call: glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, internal->internal_w, internal->internal_h,...

I am using OpenGL to do some GPGPU computations through the combination of one vertex shader and one fragment shader. I need to do computations on a image at different scale. I would like to use mi...

I am working with OpenGL ES (via WebGL), but I think this question is applicable to the full OpenGL profile as well. Suppose I create an OpenGL texture with full mipmap levels, and I set its TEXTU...

I'm trying to blur a depth texture by blurring & blending mipmap levels in a fragment shader. I have two frambuffer objects: 1) A color frambuffer with a depth renderobject attached. 2) A z fr...