src/gallium/auxiliary/vl/vl_idct.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2010 Christian König
   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 #ifndef vl_idct_h
  29 #define vl_idct_h
  30
  31 #include <pipe/p_state.h>
  32
  33 /* shader based inverse distinct cosinus transformation
  34  * expect usage of vl_vertex_buffers as a todo list
  35  */
  36 struct vl_idct
  37 {
  38    struct pipe_context *pipe;
  39
  40    unsigned buffer_width;
  41    unsigned buffer_height;
  42    unsigned blocks_x, blocks_y;
  43
  44    void *rs_state;
  45
  46    void *samplers[2];
  47
  48    void *matrix_vs, *transpose_vs;
  49    void *matrix_fs, *transpose_fs;
  50
  51    struct pipe_sampler_view *matrix;
  52 };
  53
  54 /* a set of buffers to work with */
  55 struct vl_idct_buffer
  56 {
  57    struct pipe_viewport_state viewport[2];
  58    struct pipe_framebuffer_state fb_state[2];
  59
  60    union
  61    {
  62       struct pipe_sampler_view *all[4];
  63       struct pipe_sampler_view *stage[2][2];
  64       struct {
  65          struct pipe_sampler_view *matrix, *source;
  66          struct pipe_sampler_view *transpose, *intermediate;
  67       } individual;
  68    } sampler_views;
  69
  70    struct pipe_transfer *tex_transfer;
  71    short *texels;
  72 };
  73
  74 /* upload the idct matrix, which can be shared by all idct instances of a pipe */
  75 struct pipe_sampler_view *vl_idct_upload_matrix(struct pipe_context *pipe);
  76
  77 /* init an idct instance */
  78 bool vl_idct_init(struct vl_idct *idct, struct pipe_context *pipe,
  79                   unsigned buffer_width, unsigned buffer_height,
  80                   unsigned blocks_x, unsigned blocks_y,
  81                   struct pipe_sampler_view *matrix);
  82
  83 /* destroy an idct instance */
  84 void vl_idct_cleanup(struct vl_idct *idct);
  85
  86 /* init a buffer assosiated with agiven idct instance */
  87 bool vl_idct_init_buffer(struct vl_idct *idct, struct vl_idct_buffer *buffer,
  88                          struct pipe_sampler_view *source, struct pipe_surface *destination);
  89
  90 /* cleanup a buffer of an idct instance */
  91 void vl_idct_cleanup_buffer(struct vl_idct *idct, struct vl_idct_buffer *buffer);
  92
  93 /* map a buffer for use with vl_idct_add_block */
  94 void vl_idct_map_buffers(struct vl_idct *idct, struct vl_idct_buffer *buffer);
  95
  96 /* add an block of to be tranformed data a the given x and y coordinate */
  97 void vl_idct_add_block(struct vl_idct_buffer *buffer, unsigned x, unsigned y, short *block);
  98
  99 /* unmaps the buffers before flushing */
 100 void vl_idct_unmap_buffers(struct vl_idct *idct, struct vl_idct_buffer *buffer);
 101
 102 /* flush the buffer and start rendering, vertex buffers needs to be setup before calling this */
 103 void vl_idct_flush(struct vl_idct *idct, struct vl_idct_buffer *buffer, unsigned num_verts);
 104
 105 #endif