skia on linux

[Ratnakar Pai]

Hi,
   I am trying to run the skia SampleApp on Ubuntu 11.10. I have used the skia trunk version r4086.
 The application compiles fine but the output appears garbled(refer scrshot attached).

Also, I get this error message on the console:
---- glGetError 502 at
    ../src/gpu/gl/GrGpuGL.cpp(820) :
        TexSubImage2D(0x0DE1, 0, left, top, width, height, externalFormat, externalType, data)

Has anyone else faced such an issue?
TIA,
Ratnakar

[Brian Salomon]

Hi Ratnakar,

We have not encountered this issue. Can you provide some info about your machine / GPU? If you find this line in GrGpuGL.cpp (148 in tip of tree):

static bool gPrintStartupSpew;

and change it to

static bool gPrintStartupSpew = true;

then when SampleApp is run from the command line it should print some info from the GL driver such as the RENDERER and VERSION strings.

Brian

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[Elliot Poger]

I think the output of the following commands might also be helpful:

dpkg -l | grep mesa

glxinfo    # this is part of the mesa-utils package

[Ratnakar Pai]

Hi,
   Please find the logs for the startupSpew/dpkg and glxinfo attached.
TIA,
Ratnakar

[Brian Salomon]

Hi Ratnakar,

It appears to me that there is some issue with your driver in texture uploading. I seem to recall an issue with GL_EXT_texture_storage on some ATI GPUs. You might try commenting out this bit in GrGLCaps.cpp:

    // Tex storage is in desktop 4.2 and can be an extension to desktop or ES.

    fTexStorageSupport = (kDesktop_GrGLBinding == binding &&

                          version >= GR_GL_VER(4,2)) ||

                         ctxInfo.hasExtension("GL_ARB_texture_storage") ||

                         ctxInfo.hasExtension("GL_EXT_texture_storage");

Also, it would probably be helpful to check the URL "chrome://gpu" in Chrome (or Chromium) and see if your GPU/driver combination has been blacklisted for known issues with Chrome.

Brian

[Ratnakar Pai]

Thanks! this works. Attached is the chrome gpu report. Except the canvas(which it says is unstable on linux) all features are hardware accelerated.
Cheers,
Ratnakar

[Brian Salomon]

On Thu, May 31, 2012 at 8:57 PM, Ratnakar Pai <ratnak...@gmail.com> wrote:

Thanks! this works. Attached is the chrome gpu report. Except the canvas(which it says is unstable on linux) all features are hardware accelerated.
Cheers,
Ratnakar

Glad that worked for you! I believe that chrome doesn't use the texture storage extension on Linux and so that may be why the driver isn't blacklisted for GPU features.

Brian