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Type: Posts; User: mhagain

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  1. -0 is a valid floating-point number.

    -0 is a valid floating-point number.
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    A PNG file contains compressed binary image data,...

    A PNG file contains compressed binary image data, and is optimized for storage on-disk.

    You cannot send PNG data directly to OpenGL. You need to use an image-loading library to convert it to RGBA...
  3. My understanding is that Microsoft actually...

    My understanding is that Microsoft actually wanted (and needed) to support OpenGL in order to break into the graphics workstation market, but that what actually happened was that the NT and Windows...
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    Yup; all of this is a case where OpenGL's holding...

    Yup; all of this is a case where OpenGL's holding on to the old API is very much a clear win because it ends up giving you an easier migration path to the new.
  5. There's no GLSL version 310; the next version...

    There's no GLSL version 310; the next version below 330 is 150. https://en.wikipedia.org/wiki/OpenGL_Shading_Language#Versions
  6. On each can you give me the output of the...

    On each can you give me the output of the following:

    glGetString (GL_VENDOR);
    glGetString (GL_RENDERER);
    glGetString (GL_VERSION);
  7. Yes, what OpenGL features are or are not...

    Yes, what OpenGL features are or are not available are nothing to do with your OS and everything to do with your hardware and drivers.
  8. OS is irrelevant - what's your hardware?

    OS is irrelevant - what's your hardware?
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    It's also important to note that you can make...

    It's also important to note that you can make these changes with OpenGL 2.0, because all of this functionality exists in OpenGL 2.0 (as do shaders).
  10. Without wide-ranging hardware support ASTC is...

    Without wide-ranging hardware support ASTC is never going to have any meaningful status. Meantime S3TC is coming out of patent later this year, and already has hardware support. I suspect that by...
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    You don't download OpenGL. OpenGL is not...

    You don't download OpenGL. OpenGL is not software. Install drivers from your GPU manufacturer - that's how you get OpenGL. If your GPU doesn't support OpenGL 4.5 then you need to upgrade your GPU.
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    http://www.nvidia.com/Download/index.aspx?lang=en-...

    http://www.nvidia.com/Download/index.aspx?lang=en-us

    http://support.amd.com/en-us/download

    https://downloadcenter.intel.com/product/80939/Graphics-Drivers
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    Not quite. it's an approximation, but it's not...

    Not quite. it's an approximation, but it's not the exact transformation. Please see https://en.wikipedia.org/wiki/SRGB#Specification_of_the_transformation
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    Reinstall your video card drivers.

    Reinstall your video card drivers.
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    OpenGL doesn't work that way. OpenGL is not...

    OpenGL doesn't work that way. OpenGL is not software.

    If you want hardware accelerated graphics then you must use the driver for your graphics card. If the driver for your graphics card does not...
  16. For (A) - glGetIntegerv (GL_MAX_TEXTURE_SIZE)...

    For (A) - glGetIntegerv (GL_MAX_TEXTURE_SIZE) will tell you, and I can guarantee that it's going to be significantly lower than what you want to create.
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    glext.h does not come with GLEW (it's not...

    glext.h does not come with GLEW (it's not necessary) nor does it come with any Windows SDK (where the general recommendation is to use something like GLEW instead).

    From reviewing the SOIL demo...
  18. Thread: Texture

    by mhagain
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    527

    What you really need is some basic OpenGL...

    What you really need is some basic OpenGL tutorials, starting with drawing a triangle and working through making it spin, lighting it, putting a texture on it.

    I'm sorry but nobody is going to be...
  19. Thread: Texture

    by mhagain
    Replies
    9
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    527

    What's not working about it? What happens when...

    What's not working about it? What happens when you try it? What doesn't happen?

    There are about a billion things that could go wrong here, so unless you actually give information other than "not...
  20. id Software did it back in the Quake days. It...

    id Software did it back in the Quake days. It involves splitting the depth depth buffer in two, using depth range 0..0.5 and 1..0.5 on alternate frames, also reversing the sense of the depth test on...
  21. Just to complete the story. Earlier GL...

    Just to complete the story.

    Earlier GL versions only specified depth test to happen after per-fragment operations. There are a number of reasons for this - one of them being that writing depth is...
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    From memory the Intel 4 series should be able to...

    From memory the Intel 4 series should be able to support up to OpenGL 2.1.

    What might be happening is that some laptop manufacturers supplied OEM drivers (i.e. drivers downloaded from your laptop...
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    This is what the game Doom 3...

    This is what the game Doom 3 did, so that's a working example that proves it's possible. The Doom 3 source code is open source and available on Github at https://github.com/id-Software/DOOM-3, but...
  24. If you're targetting GL 2.1 then you're not...

    If you're targetting GL 2.1 then you're not targetting modern GPUs so current best practice isn't going to be relevant for you. You really need to optimize around older hardware instead.
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    No, OpenGL is not software.

    No, OpenGL is not software.
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