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Type: Posts; User: markc

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  1. Heads up on major change to loadtest apps and build system

    I am working on changes to make the loadtest applications portable. *_loadtests will be refactored to use SDL and project and make files will be generated with GYP. I was reluctant to add these...
  2. Sticky: The SPIR-V specification does not describe a file...

    The SPIR-V specification does not describe a file format. It describes a binary form in memory and that form is a stream of words. Endianness only comes in to play if the stream of words has been...
  3. Sticky: Because it is very low level and leaves...

    Because it is very low level and leaves management of pretty much everything up to the application, Vulkan is not for beginners. Beginners are probably better off using the AZDO subset of OpenGL...
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    I am delighted to hear you are implementing a...

    I am delighted to hear you are implementing a loader/write for jMonkeyEngine. Thank you for your efforts.

    Color space is indicated by the internalFormat specified in the KTX file. For sRGB images,...
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    This has nothing to do with endianness. The spec...

    This has nothing to do with endianness. The spec says that the elements of a group (e.g. RGBA) are fetched one at a time from memory and it specifies the order in which they are fetched. It is indeed...
  6. It is impossible to say from the data provided....

    It is impossible to say from the data provided. It is necessary to know which version of OpenGL ES you are using and to see the code that creates the texture and the code that attaches the texture to...
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    There are 2 strange things. First you are setting...

    There are 2 strange things. First you are setting the attrib pointer for m_distLocation to read from 0. Second an unknown variable "et" is being passed as the mode parameter of glDrawArrays. The...
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    I don't know of any diagram but the spec and man...

    I don't know of any diagram but the spec and man pages explicitly call out errors when the dependencies are not met. For the example you cite, the man page for glAttachShader says that...
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    All you need to compile OpenGL ES applications...

    All you need to compile OpenGL ES applications are the headers which can be downloaded from http://www.khronos.org/registry/gles/.

    To link the application you will need the SDK(s) for the...
  10. What memory are you measuring and how are you...

    What memory are you measuring and how are you measuring it? As far as I recall there is no easy way to measure the amount of memory GL is using to store a texture.

    That said, IIRC there is no...
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    I have tried several times to get Git to remove...

    I have tried several times to get Git to remove the blasted CRLF. It seems I failed. I will try again.

    I have built libktx on Ubuntu 12.10. I am travelling so I can't access the machine to check...
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    Official KTX GitHub repository open

    The sources are now up on GitHub at https://github.com/KhronosGroup/KTX.

    - - - Updated - - -



    Could you please submit pull requests for these fixes to the new KTX github repo. Thanks.
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    I have received approval to move the KTX sources...

    I have received approval to move the KTX sources to Github. I'll post again when I have completed the move.
  14. Thread: DDS support?

    by markc
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    I agree. If you can find that code please send...

    I agree. If you can find that code please send it. Actually I will soon move the KTX source to Github so you will be able to just send a pull request.
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    According to my sources at NVIDIA the only NVIDIA...

    According to my sources at NVIDIA the only NVIDIA products with ETC2 decoding in hardware are the Logan family products. Those also have ASTC decoding in hardware.

    Sorry it took me so long to...
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    I don't hang out at stackoverflow. The first...

    I don't hang out at stackoverflow.

    The first question is "are you comparing apples with apples?" That is are the images in the KTX and DDS files compressed the same way? I suspect the answer is no...
  17. Thread: DDS support?

    by markc
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    I want to avoid needing a huge list of...

    I want to avoid needing a huge list of dependencies to build toktx. That is why it only includes a PBM reader. You can easily find tools, such as ImageMagick, to convert most formats to PBM. Note:...
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    @parojt thank you for the information. I'll get...

    @parojt thank you for the information. I'll get the changes in mainline as soon as I have a moment.
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    Thank you for the fixes. I will review them and...

    Thank you for the fixes. I will review them and merge them into the mainline. If you could provide a patch, that would result in them appearing in the mainline sooner. I will likely move the source...
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    libktx version 2.0 released

    libktx version 2.0 has been released with support for ETC2 and EAC. See the following post in the KTX forum for details:
    ...
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    libktx version 2.0 released

    Version 2.0 of the KTX library has just been released.

    Version 2 adds support for ETC2 and EAC textures and conversion of legacy LUMINANCE* and INTENSITY* formats when loading in an OpenGL core...
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    Re: Implement OpenGL/ES to new CPU

    gles-1.0c.tgz from Khronos is only a shim that sits above OpenGL on a desktop PC so it is not suitable for your porting effort.

    I think mesa relies on a JIT compiler to compile loops at run-time...
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    Sticky: Welcome to the KTX forum

    This forum is for the discussion of ideas :idea:, and questions :?: about KTX, a lightweight file format for storing textures for OpenGL family APIs, and the open source KTX tools available from the...
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    Re: Programming with as little bloat as possible

    Does the HTC Fuze have an OpenGL ES 2.0 h/w and an OpenGL ES 2.0 library?

    If you want to avoid Visual Studio, your first task is to obtain a compiler. One likely candidate is the GCC ARM...
  25. Re: How to copy pixel buffer to EGL pbuffer surface?

    In my previous reply, I forgot to mention that there is an OES_draw_texture extension supported by several implementations with which you can draw a texture into the color buffer. It's quicker than...
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