C++ (Cpp) _mesa_get_texture_layers Examples

Example #1

GLboolean
_mesa_is_image_unit_valid(struct gl_context *ctx, struct gl_image_unit *u)
{
   struct gl_texture_object *t = u->TexObj;
   mesa_format tex_format;

   if (!t)
      return GL_FALSE;

   if (!t->_BaseComplete && !t->_MipmapComplete)
       _mesa_test_texobj_completeness(ctx, t);

   if (u->Level < t->BaseLevel ||
       u->Level > t->_MaxLevel ||
       (u->Level == t->BaseLevel && !t->_BaseComplete) ||
       (u->Level != t->BaseLevel && !t->_MipmapComplete))
      return GL_FALSE;

   if (_mesa_tex_target_is_layered(t->Target) &&
       u->_Layer >= _mesa_get_texture_layers(t, u->Level))
      return GL_FALSE;

   if (t->Target == GL_TEXTURE_BUFFER) {
      tex_format = _mesa_get_shader_image_format(t->BufferObjectFormat);

   } else {
      struct gl_texture_image *img = (t->Target == GL_TEXTURE_CUBE_MAP ?
                                      t->Image[u->_Layer][u->Level] :
                                      t->Image[0][u->Level]);

      if (!img || img->Border || img->NumSamples > ctx->Const.MaxImageSamples)
         return GL_FALSE;

      tex_format = _mesa_get_shader_image_format(img->InternalFormat);
   }

   if (!tex_format)
      return GL_FALSE;

   switch (t->ImageFormatCompatibilityType) {
   case GL_IMAGE_FORMAT_COMPATIBILITY_BY_SIZE:
      if (_mesa_get_format_bytes(tex_format) !=
          _mesa_get_format_bytes(u->_ActualFormat))
         return GL_FALSE;
      break;

   case GL_IMAGE_FORMAT_COMPATIBILITY_BY_CLASS:
      if (get_image_format_class(tex_format) !=
          get_image_format_class(u->_ActualFormat))
         return GL_FALSE;
      break;

   default:
      assert(!"Unexpected image format compatibility type");
   }

   return GL_TRUE;
}

Example #2

File: shaderimage.c Project: DirectFB/mesa

static GLboolean
validate_image_unit(struct gl_context *ctx, struct gl_image_unit *u)
{
   struct gl_texture_object *t = u->TexObj;
   struct gl_texture_image *img;

   if (!t || u->Level < t->BaseLevel ||
       u->Level > t->_MaxLevel)
      return GL_FALSE;

   _mesa_test_texobj_completeness(ctx, t);

   if ((u->Level == t->BaseLevel && !t->_BaseComplete) ||
       (u->Level != t->BaseLevel && !t->_MipmapComplete))
      return GL_FALSE;

   if (_mesa_tex_target_is_layered(t->Target) &&
       u->Layer >= _mesa_get_texture_layers(t, u->Level))
      return GL_FALSE;

   if (t->Target == GL_TEXTURE_CUBE_MAP)
      img = t->Image[u->Layer][u->Level];
   else
      img = t->Image[0][u->Level];

   if (!img || img->Border ||
       get_image_format_class(img->TexFormat) == IMAGE_FORMAT_CLASS_NONE ||
       img->NumSamples > ctx->Const.MaxImageSamples)
      return GL_FALSE;

   switch (t->ImageFormatCompatibilityType) {
   case GL_IMAGE_FORMAT_COMPATIBILITY_BY_SIZE:
      if (_mesa_get_format_bytes(img->TexFormat) !=
          _mesa_get_format_bytes(u->_ActualFormat))
         return GL_FALSE;
      break;

   case GL_IMAGE_FORMAT_COMPATIBILITY_BY_CLASS:
      if (get_image_format_class(img->TexFormat) !=
          get_image_format_class(u->_ActualFormat))
         return GL_FALSE;
      break;

   default:
      assert(!"Unexpected image format compatibility type");
   }

   return GL_TRUE;
}