I am trying to load a texture into WebGl and read a pixel color from it (to eventually use in a shader). When I read the pixel color at position 70,70 ...
I am trying to load a texture into WebGl and read a pixel color from it (to eventually use in a shader). When I read the pixel color at position 70,70 ...
I'm trying to retrieve a Pixel-value from a Renderbuffer attached to an unbound Framebuffer. Since I'm trying to avoid changing global state when read ...
The open gl es 2.0 extension, OES_depth_texture, enables writing of depth information to frame buffer with an attached texture. However, the spec not ...
Given a textureId, I need to extract pixel data from the texture. glReadPixels works, but it is extremely slow on some devices, even with FBO/PBO. (O ...
I use "readPixels()" for reading pixel color on webgl-canvas. I cannot read pixel when antialise set to false for getContext option. I can read with b ...
Ok I'm going to keep this as simple as possible. I want to pass data between shader programs. I'm using readPixels currently to do that but I feel it ...
Sorry if I am asking something which is already available. So far I could not trace. I read details about FBO and got a fair idea about off-screen buf ...
I am trying to render to an off-screen FBO a scene I made, and if I set width/height above 3844/1065, my final image gets limited to that resolution. ...
In OpenGL I am able to read the z-buffer values, using glReadPixels, like so: If I do the same in OpenGL ES 3.2 I get a GL_INVALID_OPERATION error. ...
i have a PyOpenGL project. i render a stadium and some pcd clouds. and i want to extract a point from the screen. i have the X,Y values and i am tryin ...
Summary I want to write the opengl pixels(GL_RGB) by glReadPixels to a QImage.This renders correct, but when i resize the window, it scales weird and ...
I'm trying to use glReadPixels to map a texture in memory to be able to use openGL's immutable storage feature. I'm using deferred shading so I prepa ...
I am reading a single pixel's depth from the framebuffer to implement picking. Originally my glReadPixels() was taking a very long time (5ms or so) an ...
I'm trying to get world coordinates from any of my rendered vertices in OpenGL window (I prefer to use GLUT library). The problem is when I'm calling ...
Using OpenGL to draw objects and also have my fragment shader outputting a scalar integer ID. For drawing the objects, I'm using multi-sampling for an ...
How can I get the value of pixel color using glReadPixels()? I did so many try but getting wrong value. My background color is blue(0,1,1) and I have ...
I am currently working with ARCore to classify images and put objects on the images. But it seems like ARCore camera doesn't provide any way to get th ...
When the online user just opened the app, even now this collapses, and we can not reproduce ourselves. crash info: ...
I am using headless-gl to run webGL on Node.js, creating an image dynamically on server. Once created, the image is to be stored in database (MongoDB) ...
I have a problem about Android get color data from textureID I hope use openGLES to got real pixels data and modify it This is my code and in the Ga ...