All Questions
Tagged with framebuffer textures
81
questions
0
votes
2
answers
376
views
Proper way to read from a texture in a compute shader which uses a storage texture
I've been searching for different resources and it seems to not be possible to read from a storage texture and then write back to it. That's why I've tried to use 2 separate textures: one as ...
- 366
0
votes
1
answer
771
views
WebGL - Rendering to framebuffer instead of to canvas example extended
The Goal
I am trying to extend the WebGL Render to Texture Tutorial to learn WebGL better. So far, I've been able to adjust it so that it renders an image textured-cube instead:
Now, what I'm trying ...
- 1,888
2
votes
1
answer
448
views
OpenGL ping pong feedback texture not completely clearing itself. Trail is left behind
The goal:
Effectively read and write to the same texture, like how Shadertoy does their buffers.
The setup:
I have a basic feedback system with 2 textures each connected to a framebuffer. As I render ...
1
vote
2
answers
608
views
How to blend many textures/buffers into one texture/buffer in OpenGL?
I have one big buffer (object) containing the MNIST dataset: many (tens of thousands) small (28x28) grayscale images, stored one-by-one in row-wise order as floats indicating pixel intensity. I would ...
user4028648
0
votes
1
answer
236
views
OpenGLES 3.0 Cannot render to a texture larger than the screen size
I have made an image below to indicate my problem. I render my scene to an offscreen framebuffer with a texture the size of the screen. I then render said texture to a screen-filling quad. This ...
0
votes
1
answer
63
views
Is it possible to use texSubImage2D on a depth texture?
I'm following this tutorial on 2D shadow mapping and I've gotten it working in WebGL. Now, I am looking to develop a way to recompute single rows in the depth texture, without clearing the entire ...
- 11.7k
1
vote
1
answer
149
views
Question about OpenGL textures, Frame Buffers and UV coordinates [closed]
I am trying to map a texture from a frame buffer object to a triangle mesh flat surface. The problem is that it ends up being black.
Code for frame buffer.
glGenFramebuffers(1, &fbo);
...
- 19
0
votes
0
answers
127
views
Why can't I render my depth map on a quad?
Some intro:
I'm currently trying to see how I can convert a depth map into a point cloud. In order to do this, I render a scene as usually and produce a depth map. From the depth map I try to recreate ...
- 593
0
votes
1
answer
330
views
WebGL - When I read pixel data from frame buffer, icon loses its transparency
I have a transparent icon map. 256x256
I created a texture using this image.
AddIconMap(imageUrl) {
const image = new Image()
const { gl } = this
image.onload = () => {
...
- 151
1
vote
1
answer
2k
views
Render depth as texture from framebuffer to displaying window
I am new to OpenGL. I want to read and save all the depth values from the rendered scene using framebuffers. I managed to set it up as a framebuffer attached to the depth component. But when I render ...
- 57
1
vote
0
answers
113
views
OpenGL exception when trying to assign Framebuffer's Color Attachment to Cubemap's faces
I need to create an Environment Map centered in the center of my scene. To do this, I'm using a framebuffer and 6 cameras to render each corner (right, left, top, bottom, back, front).
First, I create ...
- 37
1
vote
1
answer
289
views
Is it possible to use a depth renderbuffer with cubemap color attachment?
I am trying to create a Framebuffer, with a GL_TEXTURE_CUBE_MAP as the Color Attachment, and GL_DEPTH24_STENCIL8 as the Depth Attachment for the Framebuffer's Renderbuffer.
I was confident that this ...
- 67
1
vote
1
answer
642
views
webgl multiple fragment shaders on a image using frame buffer object gives black output
First off, I'm new at WebGL. I am trying to applying multiple fragment shaders(here, 2 shaders) on a single image to be rendered. I read in different articles and other stack overflow questions that ...
- 33
1
vote
1
answer
2k
views
read and write to different textures within same framebuffer
Is it possible to read from texture A and write to texture B that both use the same FBO? I don't believe this has been covered here already. Someone asked the question about OpenGL, but not about ...
- 333
3
votes
1
answer
2k
views
Saving a glTexImage2D to the file system for inspection
I have a 3D graphics application that is exhibiting bad texturing behavior (specifically: a specific texture is showing up as black when it shouldn't be). I have isolated the texture data in the ...
- 7,227