Master’s thesis: Parallel Computing for Digital Signal Processing on Mobile Device GPUs

May 27th, 2014

This master’s thesis by Markus Konrad analyzes the potentials of GPGPU on mobile devices such as smartphones or tablets. The question was, if and how the GPU on such devices can be used to speed up certain algorithms especially in the fields of image processing. GPU computing technologies such as OpenCL, OpenGL shaders, and Android RenderScript are assessed in the thesis. The abstract reads as follows:

This thesis studies how certain popular algorithms in the field of image and audio processing can be accelerated on mobile devices by means of parallel execution on their graphics processing unit (GPU). Several technologies with which this can be achieved are compared in terms of possible performance improvements, hardware and software support, as well as limitations of their programming model and functionality. The results of this research are applied in a practical project, consisting of performance improvements for marker detection in an Augmented Reality application for mobile devices.

The PDF is available for download and the source-code for some Android application prototypes is published on github.

OpenCL Studio 2.0 released

February 10th, 2012

OpenCL Studio integrates OpenCL and OpenGL into a single development environment for high performance computing. The feature rich editor, interactive scripting language and extensible plug-in architecture support the rapid development of complex parallel algorithms and accompanying visualizations. Version 2.0 now conforms to the Lua plug-in architecture and closely integrates the open-source libCL parallel algorithm library. A complete version of OpenCL Studio is freely available for download at, including instructional videos and technology showcases.

Introduction to Generic Accelerated Computing with Libra SDK

November 30th, 2011

Libra SDK is a sophisticated runtime including API, sample programs and documentation for massively accelerating software computations. This introduction tutorial provides an overview and usage examples of the powerful Libra API & math libraries executing on x86/x64, OpenCL, OpenGL and CUDA technology. Libra API enables generic and portable CPU/GPU computing within software development without the need to create multiple, specific and optimized code paths to support x86, OpenCL, OpenGL or CUDA devices. Link to PDF:

gDEBugger V5.6 – Introducing iPhone and iPad on-device debugging and profiling

July 8th, 2010

Graphic Remedy is proud to announce the release of gDEBugger Version 5.6 for Windows, Linux, Mac OS X, iPhone and iPad. This version introduces iPhone and iPad on-device debugging and profiling abilities, letting developers optimize their apps in real-time on actual iPhone and iPad hardware, while viewing invaluable inside information such as the device’s GPU, CPU, graphics driver and operating system performance counters.

gDEBugger is an OpenGL, OpenGL ES and OpenCL debugger and profiler that traces application activity on top of the OpenGL API, and lets programmers see what is happening within the graphics system implementation to find bugs and optimize OpenGL application performance. gDEBugger runs on Windows, Mac OS X, iPhone and Linux operating systems.

Libra 1.2 includes new OpenCL back end

June 8th, 2010

GPU Systems LogoGPU Systems has added an OpenCL back end implementation to its Libra Technology compiler and runtime architecture. Libra version 1.2 now supports x86/x64, OpenGL/OpenCL and CUDA compute back ends. The OpenCL back end generates dynamic code specifically for AMD GPUs. Also, the CUDA back end generator has been enhanced with Fermi capabilities and this new release brings full BLAS 1,2,3 matrix, vector, dense, sparse, complex, single/double standard math library functionality and access through a standard C programming interface & library. The high-level approach of the Libra API enables developers to easily extend existing high-level functionality from their favorite programming language.

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HPMC open-source GPU volumetric iso-surface extraction library

November 30th, 2009

HPMC is a small OpenGL/C/C++-library that extracts iso-surfaces of volumetric data directly on the GPU.

The library analyzes a lattice of scalar values describing a scalar field that is either stored in a Texture3D or can be accessed through an application-provided snippet of shader code. The output is a sequence of vertex positions and normals that form a triangulation of the iso-surface. HPMC provides traversal code to be included in an application vertex shader, which allows direct extraction in the vertex shader. Using the OpenGL transform feedback mechanism, the triangulation can be stored directly into a buffer object.

(C. Dyken, G. Ziegler, C. Theobalt, H.-P. Seidel, High-speed Marching Cubes using Histogram Pyramids, Computer Graphics Forum 27 (8), 2008.)

OpenGL 3.2 Released

August 6th, 2009

At SIGGRAPH 2009 , the Khronos Group announced OpenGL 3.2, the third major update in twelve months. The most important new features are GLSL version 1.5 with core support for geometry shaders, and the introduction of two profiles within the specification providing developers the choice of using the streamlined Core profile for new application development or the Compatibility profile which provides full backwards compatibility with previous versions of the OpenGL standard for existing and workstation applications.

The full press release is here,  and the specification is available for download.

gDEBugger V4.4 Adds Graphics Memory Analysis viewer and Graphic Memory Leak Detection

December 3rd, 2008

The new gDEBugger V4.4 adds in-depth analysis of OpenGL memory usage by tracking graphics memory allocated objects, their memory consumption and allocation call stacks. Also new in this version are graphics memory leak detection and the ability to break on them.

Using these new features will enable OpenGL and OpenGL ES developers to optimize their applications’ memory consumption and improve overall application performance.

gDEBugger, an OpenGL and OpenGL ES debugger and profiler, traces application activity on top of the OpenGL API, lets programmers see what is happening within the graphics system implementation to find bugs and optimize OpenGL application performance. gDEBugger runs on Windows and Linux operating systems. (Graphic Remedy Website)

gDEBugger LINUX – Public Beta Available!

September 4th, 2007

gDEBugger is an OpenGL Debugger and Profiler. It provides the application behavior information a developer needs to find bugs and to optimize application performance. gDEBugger Linux brings all of gDEBugger’s debugging and profiling abilities to the Linux OpenGL developers’ world. gDEBugger Linux is now available as a final beta version. This version includes all gDEBugger’s features and supports the Linux i386 and x86_64 architectures. gDEBugger Linux official version will be released shortly after Graphic Remedy receive feedback from the field and fix any reported issues. (

OpenGL FBO Class version 1.5

November 16th, 2006

Aaron Lefohn announces the release of version 1.5 of his OpenGL FBO Class. This release includes the following changes:

  1. Updated enumerations in error checking to match current FBO specification.
    Fixes compilation errors with current drivers.
  2. Small API change to AttachTexture to better support attaching multiple
    textures with a single entry point.
  3. Added FBO Manager for managing a pool of FBOs based on width, height, and
    format. Manager is configurable to use user-defined management policies/keys.

(Available on sourceforge.)