GPU (graphics processing unit), is a specialized processor designed to accelerate the process of building images.

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387 views

Proper updating of GeoClipMaps

I have been working on an implementation of gpu-based geo clip maps, but there is a section of the GPU Gems 2 article that I just can't seem to understand, specifically this paragraph, and more ...
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82 views

OpenGL: Frame partially jumps back and forth

I'm working on a project with SDL and OpenGL. The game works great on Windows, Linux, OS X and iOS. However, the Android version is showing a problem on my phone in particular. I have tested another ...
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How much is atomicAdd slower than an atomic counter?

I am considering replacing an atomic counter in my shader code with a SSBO an atomicAdd operation. What I need to know is the difference in performance of these two. I know the atomic counter executes ...
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398 views

How is Ping-Ponging done in Stage3D & AGAL (Flash Player 11)

Does anyone know how to create a Texture feedback effect in Stage3D / AGAL? I've just found the term "ping-ponging" in some GPU wikipage, hopefully I'm using it in the right place! I'll share with ...
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0answers
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Is there a way to identify, within a shader, the current GPU thread ID?

My question is rather simple: within a shader, is there a way (that works both in DirectX and OpenGL) to retrieve the ID of the given GPU thread being executed at the given iteration? I am using ...
2
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514 views

Android: Hardware Scaler

I was reading through this: using-hardware-scaler-for-performance and am a little confused by it. It says all you need to do to invoke the scaler is to set it like so: surfaceView = new ...
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Framebuffer Heightmap Performance Problems

I am using a framebuffer to procedurally create heightmaps with perlin noise in GLSL shaders. There are two main problems that I am experiencing with this. I have a quadtree for the terrain and in the ...
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OpenGL textureGather and DirectX gather

These functions sample multiple RGBA pixels but return only a single component. OpenGL: https://www.opengl.org/sdk/docs/man/html/textureGather.xhtml DirectX: ...
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Simplex noise input problem

I am running simplex noise on a compute shader and am having problems getting an even(ish) distribution, with very obvious errors. I know this is due to particular inputs used but I have no bases for ...
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What is GPU instancing and what are its differences in comparison to standard instancing?

I have been reading a lot of debate on a new feature that will be in Unity 5.4: GPU instancing. I understand the importance of instancing in general, both in terms of saving memory and draw calls. ...
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41 views

is there a way to make decent material having reflection, glossy behaviour etc. whithout GPU (GLSL, HLSL)?

I'm developping 3D applications using Irrlicht, i want to know if texturing is the only one solution to fake material behaviour, 'cause my video card doesn't support GPU programming (GEForce 6800)
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How to simulate a recoverable graphics driver crash

I'm trying to work around a bug in an external piece of code (Telerik graphs) that I do not have the source code to. It seems to make the graphics driver crash unexpectedly, but the graphics driver is ...
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What limits the number of vertices the GPU can process per clock cycle?

I am currently experimenting with OpenGL to make my own game. I wrote some test code to see what are the limits of my GPU. I own a Geforce 840m. This essentially consists of a draw command ...