[Mesa-dev] Trying to add pixmap support in Mesa

[Vivek Singh]

ello All

   I am using Mesa-7.10.2 stack.

I am trying to run EGL with egl_gallium state trackers
(GLES=>EGL=>egl_gallium=>fbdev) over fbdev with following configuration


./configure --prefix=/opt/mesa-arm-genoa-new --host=arm-linux
--build=i686-linux --enable-gles2 --with-x=no --with-egl-platforms=fbdev
 --with-egl-displays=fbdev --with-driver=no   --disable-glu --disable-glw
--disable-glut --disable-gl-osmesa --disable-opengl --enable-debug
--enable-gles-overlay

I am able to run applications which can draw directly on scanout
surfaces/pbuffer (es2gears).

I want to run application which uses eglCreateImageKHR (with user defined
pixmap structures) to make textures
and eglCreatePixmapSurface (with user defined pixmap structures) to create a
Pixmap surfaces. Since Native_fbdev.c doesnot support pixmap surfaces both
calls fail.
       I tried to put pixmap support in native_fbdev.c with following steps
1)putting a function in
 fbdpy->base.destroy = fbdev_display_destroy;
 fbdpy->base.get_param = fbdev_display_get_param;
 fbdpy->base.get_configs = fbdev_display_get_configs;

 /*Adding function to create PIXMAP surface*/
 fbdpy->base.is_pixmap_supported = fbdev_display_is_pixmap_supported;
 fbdpy->base.create_pixmap_surface = fbdev_display_create_pixmap_surface;

2)Added support flag true in native_config
  pixmap_bit=true;

I am able to get finctions  eglCreateImageKHR/eglCreatePixmapSurface run
successfully able to get user defined pixmap
to native_fbdev by typecasting it ot EGLNativePixmaptype. But I am not able
to draw any texture on EGLImage. I suspect
glEGLImageTargetTexture2DOES is not working properly with EGLImage returned
from eglCreateImageKHR.

I dont know how I can make it visible to GLES by calling function like
glEGLImageTargetTexture2DOES.

I am very new to GLES and EGL . Please provide me suggestions so that I can
proceed further.

For convenient i am putting my code which I have inserted to native_fbdev.c

static struct native_surface *
fbdev_display_create_pixmap_surface(struct native_display *ndpy,
                                     EGLNativePixmapType pix,
                                     const struct native_config *nconf)
{
   printf("START %s    %s\n", __FUNCTION__, __FILE__);
   fbdev_pixmap  *pixmap = (fbdev_pixmap *)pix;
   /*Trying To print pixmap detail*/

   printf("pixmap->height                 ::%d\n", pixmap->height);
   printf("pixmap->width                  ::%d\n",  pixmap->width);
   printf("pixmap->bytes_per_pixel        ::%d\n", pixmap->bytes_per_pixel);
   printf("pixmap->buffer_size            ::%d\n",  pixmap->buffer_size);
   printf("pixmap->red_size               ::%d\n", pixmap->red_size);
   printf("pixmap->green_size             ::%d\n",  pixmap->green_size);
   printf("pixmap->red_size               ::%d\n", pixmap->blue_size);
   printf("pixmap->alpha_size             ::%d\n",  pixmap->alpha_size);
   printf("pixmap->luminance_size         ::%d\n", pixmap->luminance_size);
   printf("pixmap->flags                  ::%d\n",  pixmap->flags);
   printf("pixmap->data              ::%p\n",   pixmap->data);

   struct fbdev_display *fbdpy = fbdev_display(ndpy);
   struct fbdev_surface *fbsurf;
   fbsurf = CALLOC_STRUCT(fbdev_surface);
   if (!fbsurf)
      return NULL;
   fbsurf->fbdpy = fbdpy;
   fbsurf->width = pixmap->width;
   fbsurf->height =  pixmap->height;
   fbsurf->type = FBDEV_SURFACE_TYPE_PIXMAP;
   fbsurf->pixmap = pix;
   fbsurf->rsurf = resource_surface_create(fbdpy->base.screen,
         nconf->color_format,
         PIPE_BIND_RENDER_TARGET |
         PIPE_BIND_DISPLAY_TARGET |  PIPE_BIND_SCANOUT );

   if (!fbsurf->rsurf) {
      FREE(fbsurf);
      return NULL;
   }

   resource_surface_set_size(fbsurf->rsurf, fbsurf->width, fbsurf->height);

   fbsurf->base.destroy = fbdev_surface_destroy;
   fbsurf->base.present = fbdev_surface_present;
   fbsurf->base.validate = fbdev_surface_validate;
   fbsurf->base.wait = fbdev_surface_wait;

   printf("END %s    %s\n", __FUNCTION__, __FILE__);
   return &fbsurf->base;

}

static struct native_display *
fbdev_display_create(int fd, struct native_event_handler *event_handler,
                     void *user_data)
{
   struct fbdev_display *fbdpy;

   fbdpy = CALLOC_STRUCT(fbdev_display);
   if (!fbdpy)
      return NULL;

   fbdpy->fd = fd;
   fbdpy->event_handler = event_handler;
   fbdpy->base.user_data = user_data;

   if (!fbdev_display_init(&fbdpy->base)) {
      FREE(fbdpy);
      return NULL;
   }

   fbdpy->base.destroy = fbdev_display_destroy;
   fbdpy->base.get_param = fbdev_display_get_param;
   fbdpy->base.get_configs = fbdev_display_get_configs;

   /*Vivek:: Adding function to create PIXMAP surface*/
    fbdpy->base.is_pixmap_supported = fbdev_display_is_pixmap_supported;
    fbdpy->base.create_pixmap_surface = fbdev_display_create_pixmap_surface;

    fbdpy->base.modeset = &fbdev_display_modeset;

   return &fbdpy->base;
}

static boolean
fbdev_display_is_pixmap_supported(struct native_display *ndpy,
                                   EGLNativePixmapType pix,
                                   const struct native_config *nconf)
{
   printf("START   %s     %s\n", __FUNCTION__, __FILE__);
   struct fbdev_display *fdpy = fbdev_display(ndpy);
   enum pipe_format fmt;
   uint depth;
   depth =  32; //hard coded for 4bpp
   switch (depth) {
   case 32:
      fmt = PIPE_FORMAT_B8G8R8A8_UNORM;
      break;
   case 24:
      fmt = PIPE_FORMAT_B8G8R8X8_UNORM;
      break;
   case 16:
      fmt = PIPE_FORMAT_B5G6R5_UNORM;
      break;
   default:
      fmt = PIPE_FORMAT_NONE;
      break;
   }

   return (fmt == nconf->color_format);
}

static boolean
fbdev_surface_flush_frontbuffer(struct native_surface *nsurf)
{
  printf("%s    %s\n", __FUNCTION__, __FILE__);
  struct fbdev_surface *fbsurf = fbdev_surface(nsurf);

   if (!fbsurf->is_current)
      return TRUE;

   if(fbsurf->type == FBDEV_SURFACE_TYPE_PIXMAP)   //Vivek
        {

           return resource_surface_present(fbsurf->rsurf,
NATIVE_ATTACHMENT_FRONT_LEFT, fbsurf->pixmap);
        }
   else
        {
           return resource_surface_present(fbsurf->rsurf,
NATIVE_ATTACHMENT_FRONT_LEFT, NULL);
        }

}


Regards
Vivek
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