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pixmap example for opengl es 2.0 on linux(x11 backend)

vaibhav

Hi Community,

 

Is there any simple sample example available in order to create Pixmap surface ?

I am using Mali400 & LInux as OS. My backend/Windowing System is X11. I tried to look into ARM SDK/emulator but coudnt find any example C code.

 

Thanks,

VK

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  • +1 Arm Employee Badge

    Hi Vaibhav,

    You can create a Pixmap surface in X11 using the XCreatePixmap function.

     pixmap = XCreatePixmap(display, window, width, height, depth);

    The function returns a Pixmap object that can be passed into eglCreateImage as EGLClientBuffer parameter to associate an eglImage to the Pixmap.

    eglCreateImageKHR(eglDisplay, EGL_NO_CONTEXT, EGL_NATIVE_PIXMAP_KHR, reinterpret_cast<EGLClientBuffer> pixmap , imageAttributes));

    You can then connect the EGLImage to a GLES Texture using glEGLImageTargetTexture2DOES and render to the texture using the GPU as an example.

    Regards,

    Daniele

Reply
  • +1 Arm Employee Badge

    Hi Vaibhav,

    You can create a Pixmap surface in X11 using the XCreatePixmap function.

     pixmap = XCreatePixmap(display, window, width, height, depth);

    The function returns a Pixmap object that can be passed into eglCreateImage as EGLClientBuffer parameter to associate an eglImage to the Pixmap.

    eglCreateImageKHR(eglDisplay, EGL_NO_CONTEXT, EGL_NATIVE_PIXMAP_KHR, reinterpret_cast<EGLClientBuffer> pixmap , imageAttributes));

    You can then connect the EGLImage to a GLES Texture using glEGLImageTargetTexture2DOES and render to the texture using the GPU as an example.

    Regards,

    Daniele

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