C++ (Cpp) intel_compressed_alignment Examples

Example #1

File: intel_mipmap_tree.c Project: toastpp/toastpp

/* Copy mipmap image between trees
 */
void
intel_miptree_image_copy(struct intel_context *intel,
                         struct intel_mipmap_tree *dst,
                         GLuint face, GLuint level,
                         struct intel_mipmap_tree *src)
{
   GLuint width = src->level[level].width;
   GLuint height = src->level[level].height;
   GLuint depth = src->level[level].depth;
   GLuint dst_offset = intel_miptree_image_offset(dst, face, level);
   GLuint src_offset = intel_miptree_image_offset(src, face, level);
   const GLuint *dst_depth_offset = intel_miptree_depth_offsets(dst, level);
   const GLuint *src_depth_offset = intel_miptree_depth_offsets(src, level);
   GLuint i;

   if (dst->compressed) {
       GLuint alignment = intel_compressed_alignment(dst->internal_format);
       height = (height + 3) / 4;
       width = ((width + alignment - 1) & ~(alignment - 1));
   }

   for (i = 0; i < depth; i++) {
      intel_region_copy(intel,
                        dst->region, dst_offset + dst_depth_offset[i],
                        0,
                        0,
                        src->region, src_offset + src_depth_offset[i],
                        0, 0, width, height);
   }

}

Example #2

File: intel_tex_layout.c Project: Starlink/mesa

void i945_miptree_layout_2d( struct intel_context *intel, struct intel_mipmap_tree *mt )
{
   GLint align_h = 2, align_w = 4;
   GLuint level;
   GLuint x = 0;
   GLuint y = 0;
   GLuint width = mt->width0;
   GLuint height = mt->height0;

   mt->pitch = mt->width0;

   if (mt->compressed) {
       align_w = intel_compressed_alignment(mt->internal_format);
       mt->pitch = ALIGN(mt->width0, align_w);
   }

   /* May need to adjust pitch to accomodate the placement of
    * the 2nd mipmap.  This occurs when the alignment
    * constraints of mipmap placement push the right edge of the
    * 2nd mipmap out past the width of its parent.
    */
   if (mt->first_level != mt->last_level) {
       GLuint mip1_width;

       if (mt->compressed) {
           mip1_width = ALIGN(minify(mt->width0), align_w)
               + ALIGN(minify(minify(mt->width0)), align_w);
       } else {
           mip1_width = ALIGN(minify(mt->width0), align_w)
               + minify(minify(mt->width0));
       }

       if (mip1_width > mt->pitch) {
           mt->pitch = mip1_width;
       }
   }

   /* Pitch must be a whole number of dwords, even though we
    * express it in texels.
    */
   mt->pitch = intel_miptree_pitch_align (intel, mt, mt->pitch);
   mt->total_height = 0;

   for ( level = mt->first_level ; level <= mt->last_level ; level++ ) {
      GLuint img_height;

      intel_miptree_set_level_info(mt, level, 1, x, y, width, 
				   height, 1);

      if (mt->compressed)
	 img_height = MAX2(1, height/4);
      else
	 img_height = ALIGN(height, align_h);


      /* Because the images are packed better, the final offset
       * might not be the maximal one:
       */
      mt->total_height = MAX2(mt->total_height, y + img_height);

      /* Layout_below: step right after second mipmap.
       */
      if (level == mt->first_level + 1) {
	 x += ALIGN(width, align_w);
      }
      else {
	 y += img_height;
      }

      width  = minify(width);
      height = minify(height);
   }
}