mesa demos revisited on i.MX6

In my quest to better understand GL/GLES I previously setup an Debian environment on i.MX6 and installed Freescale support libraries to enable hardware accelerated GL functionality.

Download source for mesa-demos-8.3.0.

Build is done in native armhf environment on the i.MX6 Sabre-lite. With usr libraries and headers installed, the following error is seen in the build:

 /usr/include/EGL/egl.h:39,
                 from eglut.c:32:
/usr/include/EGL/eglvivante.h:242:2: error: #error "Platform not recognized"
 #error "Platform not recognized"

Use the following configure to define platform LINUX:

CFLAGS=-DLINUX ./configure --enable-vg=no

(configure detects "vg" available on my system but throws many compile errors which I don't care to deal with for now so use --enable-vg=no   to avoid additional errors)

The following modules are automatically enabled from the above configure line ... one outcome I didn't check for was situation with GL support (what any header files are supplied with support libraries):
checking for GLEW... yes
checking for GLU... yes
checking for EGL... yes
checking for GLESV1... yes
checking for GLESV2... yes
checking for OSMESA... no
checking for DRM... yes
checking for X11... yes
checking for GBM... yes
checking for FREETYPE2... yes

The following error is seen in the build  ... assume at least in this case it is a benign side affect of co-mingling locally built packages with chip vendor support libraries:

/usr/bin/ld: warning: libGL.so.1, needed by /usr/lib/gcc/arm-linux-gnueabihf/4.9/../../../arm-linux-gnueabihf/libGLEW.so, may conflict with libGL.so.1.2

Demos in src/egl/opengles1, src/egl/opengles2 working.

Some in src/demos working, some not, some real slow.

Most in src/tests apparently not ... glutfx full screen but otherwise not interesting.
I noticed from eglinfo that there is no 'gl' context so don't expect anything from src/egl/opengl to work.

debian@arm:~/src/mesa/mesa-demos-8.3.0/src/egl/opengl$ DISPLAY=:0 LIBGL_DEEBUG=verbose ./eglinfo -info

EGL API version: 1.4

EGL vendor string: Vivante Corporation

EGL version string: 1.4

EGL client APIs: OpenGL_ES OpenVG

EGL extensions string:

    EGL_KHR_reusable_sync EGL_KHR_fence_sync EGL_KHR_image

    EGL_KHR_image_base EGL_KHR_image_pixmap EGL_KHR_gl_texture_2D_image

    EGL_KHR_gl_texture_cubemap_image EGL_KHR_gl_renderbuffer_image

    EGL_KHR_lock_surface EGL_KHR_create_context

    EGL_EXT_create_context_robustness EGL_EXT_buffer_age

EGL client extensions string:

Configurations:

     bf lv colorbuffer dp st  ms    vis   cav bi  renderable  supported

  id sz  l  r  g  b  a th cl ns b    id   eat nd gl es es2 vg surfaces 

---------------------------------------------------------------------

0x01 12  0  4  4  4  0  0  0  0 0 0x21--      a     y  y     win,pb

0x02 12  0  4  4  4  0  0  8  0 0 0x21--      a     y  y     win,pb

src/xdemos/glxgears is good to go: 

debian@arm:~/src/mesa/mesa-demos-8.3.0/src/xdemos$ DISPLAY=:0 LIBGL_DEBUG=verbose ./glxgears
libGL: OpenDriver: trying /usr/lib/dri/vivante_dri.so
drmOpenByBusid: Searching for BusID platform:Vivante GCCore:00
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 4, (OK)
drmOpenByBusid: drmOpenMinor returns 4
drmOpenByBusid: drmGetBusid reports platform:Vivante GCCore:00
748 frames in 5.0 seconds = 149.467 FPS
752 frames in 5.0 seconds = 150.196 FPS
^CProcess termination by interupt!
debian@arm:~/src/mesa/mesa-demos-8.3.0/src/xdemos$   

This patch against mesa-demos-8.3.0 incorporates these various hacks and fixes including one known issue regarding undefined reference to `glWindowPos2iARB'.



Good luck!