vl_idct.h revision fcf765620d803b376582afb618b1f643242b641b 
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 */
36struct vl_idct
37{
38   struct pipe_context *pipe;
39
40   unsigned buffer_width;
41   unsigned buffer_height;
42   unsigned blocks_x, blocks_y;
43   unsigned nr_of_render_targets;
44
45   void *rs_state;
46
47   void *samplers[2];
48
49   void *matrix_vs, *transpose_vs;
50   void *matrix_fs, *transpose_fs;
51
52   struct pipe_sampler_view *matrix;
53};
54
55/* a set of buffers to work with */
56struct vl_idct_buffer
57{
58   struct pipe_viewport_state viewport[2];
59   struct pipe_framebuffer_state fb_state[2];
60
61   union
62   {
63      struct pipe_sampler_view *all[4];
64      struct pipe_sampler_view *stage[2][2];
65      struct {
66         struct pipe_sampler_view *matrix, *source;
67         struct pipe_sampler_view *transpose, *intermediate;
68      } individual;
69   } sampler_views;
70};
71
72/* upload the idct matrix, which can be shared by all idct instances of a pipe */
73struct pipe_sampler_view *vl_idct_upload_matrix(struct pipe_context *pipe, float scale);
74
75/* init an idct instance */
76bool vl_idct_init(struct vl_idct *idct, struct pipe_context *pipe,
77                  unsigned buffer_width, unsigned buffer_height,
78                  unsigned blocks_x, unsigned blocks_y,
79                  unsigned nr_of_render_targets,
80                  struct pipe_sampler_view *matrix);
81
82/* destroy an idct instance */
83void vl_idct_cleanup(struct vl_idct *idct);
84
85/* init a buffer assosiated with agiven idct instance */
86bool vl_idct_init_buffer(struct vl_idct *idct, struct vl_idct_buffer *buffer,
87                         struct pipe_sampler_view *source,
88                         struct pipe_sampler_view *intermediate,
89                         struct pipe_surface *destination);
90
91/* cleanup a buffer of an idct instance */
92void vl_idct_cleanup_buffer(struct vl_idct *idct, struct vl_idct_buffer *buffer);
93
94/* flush the buffer and start rendering, vertex buffers needs to be setup before calling this */
95void vl_idct_flush(struct vl_idct *idct, struct vl_idct_buffer *buffer, unsigned num_verts);
96
97#endif
98