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      1 /**************************************************************************
      2  *
      3  * Copyright 2012 Christian Knig.
      4  * All Rights Reserved.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the
      8  * "Software"), to deal in the Software without restriction, including
      9  * without limitation the rights to use, copy, modify, merge, publish,
     10  * distribute, sub license, and/or sell copies of the Software, and to
     11  * permit persons to whom the Software is furnished to do so, subject to
     12  * the following conditions:
     13  *
     14  * The above copyright notice and this permission notice (including the
     15  * next paragraph) shall be included in all copies or substantial portions
     16  * of the Software.
     17  *
     18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
     21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
     22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
     23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
     24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     25  *
     26  **************************************************************************/
     27 
     28 /* implementation of a median filter for noise reduction */
     29 
     30 #ifndef vl_median_filter_h
     31 #define vl_median_filter_h
     32 
     33 #include "pipe/p_state.h"
     34 
     35 enum vl_median_filter_shape
     36 {
     37    VL_MEDIAN_FILTER_BOX,
     38    VL_MEDIAN_FILTER_CROSS,
     39    VL_MEDIAN_FILTER_X,
     40    VL_MEDIAN_FILTER_HORIZONTAL,
     41    VL_MEDIAN_FILTER_VERTICAL
     42 };
     43 
     44 struct vl_median_filter
     45 {
     46    struct pipe_context *pipe;
     47    struct pipe_vertex_buffer quad;
     48 
     49    void *rs_state;
     50    void *blend;
     51    void *sampler;
     52    void *ves;
     53    void *vs, *fs;
     54 };
     55 
     56 bool
     57 vl_median_filter_init(struct vl_median_filter *filter, struct pipe_context *pipe,
     58                       unsigned width, unsigned height, unsigned size,
     59                       enum vl_median_filter_shape shape);
     60 
     61 void
     62 vl_median_filter_cleanup(struct vl_median_filter *filter);
     63 
     64 
     65 void
     66 vl_median_filter_render(struct vl_median_filter *filter,
     67                         struct pipe_sampler_view *src,
     68                         struct pipe_surface *dst);
     69 
     70 #endif /* vl_median_filter_h */
     71