fbo Questions
3
Solved
I'm trying to enable mutlisampling and alpha-to-coverage for an FBO. Using the default framebuffer, all I have to do is call glEnable(GL_MULTISAMPLE) and glEnable(GL_SAMPLE_ALPHA_TO_COVERAGE). Howe...
Signora asked 9/12, 2013 at 23:14
3
I'm trying to implement color picking with FBO. I have multisampled FBO (fbo[0]) which I use to render the scene and I have non multisampled FBO (fbo[1]) which I use for color picking.
The problem...
1
I have a problem with rendering to texture and offscreen framebuffer with OpenGLES on iPhone.
(source: imagehost.org)
(source: imagehost.org)
First image shows mahjong tiles rendered to CAEAGL...
Cory asked 3/5, 2010 at 16:18
1
Solved
I am trying to render to multiple textures as COLOR_ATTACHMENTs without success. All I get from displaying them is a black screen (with a red clear fill) meaning my texture is read but is 'empty'.
...
Farthest asked 27/5, 2015 at 13:54
1
Solved
I would like to draw a scene to the default framebuffer, while also drawing some auxiliary data related to some of my drawn models to an offscreen buffer with the same image dimensions as the defau...
1
Solved
I need your help again. I wanna use Frame Buffer Object bigger than the Screen size. When I do it as below FBO size 1024 x 1024 is cut off from the top in resolution 1024 x 768. I couldn't find the...
2
Solved
I'm working with OpenGL Frame Buffer Objects. I have created a Frame Buffer Object with 2 color textures and a depth texture.
I'm using
glBindFramebuffer(GL_READ_FRAMEBUFFER, ID);
To bind my f...
Chaconne asked 13/12, 2014 at 14:28
1
Solved
Can I use FBO blitting https://www.opengl.org/registry/specs/EXT/framebuffer_blit.txt , to pass rendered FBO, as texture, to my resolve shader input?
Can I use FBO as input for shader "sampler2D"?...
2
Solved
What is the best method to copy pixels from texture to texture?
I've found some ways to accomplish this.
For instance, there's a method glCopyImageSubData() but my target version is OpenGL 2.1, so...
Address asked 1/6, 2014 at 14:43
1
I am rendering a scene in OpenGL in a low resolution into a framebuffer. Then I intend to draw this version onto the whole screen (upscaled with GL_NEAREST). I do this using texture blitting (glBli...
1
Solved
When I resize my window, I need to resize my textures that are attached to my framebuffer. I tried calling glTexStorage2D again, with different size parameters. However that does not work.
How can...
2
I'm trying to use an FBO in a material in THREE.js. I have a GPU-based fluid simulation which outputs its final visualisation to a framebuffer object, which I would like to use to texture a mesh. H...
Jumpy asked 26/3, 2013 at 16:9
1
I have reimplemented OpenCSG for modern OpenGL version.
PixelFormatAttributes:
NSOpenGLPFAColorSize , 24 ,
NSOpenGLPFAAlphaSize , 8 ,
NSOpenGLPFADepthSize , 32 ,
NSOpenGLPFAStencilSize , 8 ,
NSOp...
Risotto asked 25/11, 2013 at 17:1
2
Solved
I have a framebuffer object in which I use Multi Target Rendering on N textures binded to it. At a certain time, I want to clear the content of some of those textures, but not all of them.
If I cal...
1
Solved
When I set stuff with glEnable, or specify func to the things I enable, and then switch frame buffer object, are my settings kept for each frame buffer object, or do I have to set them for each one...
2
Solved
I'have to render off screen in OpenGL and then pass the image to a QImage. Plus, just for exercise I'd like to transfer to the CPU also the depth and the stencil buffer.
For drawing offscreen I've ...
Stowe asked 17/7, 2013 at 22:54
1
Solved
I'm trying to draw to a renderbuffer (512x512) that's larger than the screen size (i.e., 320x480).
After doing a glReadPixels, the image looks correct, except once the dimensions of the image exce...
2
Solved
I have an application where I need to do the following:
load a texture from disk into a GL texture
run an image filter on it (render it onto another texture via an FBO)
display the resulting text...
Contingence asked 28/5, 2013 at 0:41
1
Solved
I have a problem with different visual results when using a FBO compared to the default framebuffer:
I render my OpenGL scene into a framebuffer object, because I use this for color picking. The t...
2
I'm developing an Android application type finger paint. I'm using OpenGL ES 2.0. Basically I have an image where every touch screen should correspond to a circle alpha to be applied where it is sh...
Dehumanize asked 17/1, 2013 at 14:55
1
I would like to do offscreen rendering (in console environment without any WS) with FBOs.
I know that it is necessary to create an OpenGL context, and at least a dummy window for any operation, the...
Postlude asked 30/9, 2012 at 15:1
3
How to access the video memory of graphics card through OpenGL programming, specifically, to get all contents of video memory?
I have tried the following two methods, but failed. With attaching th...
Verso asked 11/5, 2012 at 17:22
1
Solved
I'm trying to render a multisampled scene to texture, here is the code I'm using. I'm getting a black screen. I check the fbo completeness at the end of init, and they report that both fbo's are co...
Twerp asked 12/2, 2012 at 10:52
1
Solved
I am rendering array of points with a custom vertex shader.
Shaders looks like:
void mainVP()
in varying int in_vertex_id : VERTEXID
{
foo(in_vertex_id);
}
So the only thing I need - is vertex ...
2
Solved
I'm confused. To use the Framebuffer Object extension (FBO) in OpenGL 1.x on Windows, which of these do I use?:
wglGetProcAddress("glGenFramebuffers");
// or
wglGetProcAddress("glGenFramebuffersEX...
1 Next >
© 2022 - 2024 — McMap. All rights reserved.