vl_idct.h revision 3a2b906805985e0a4258bcbaed4cdff758875514 
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
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 */
55struct 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 */
75struct pipe_sampler_view *vl_idct_upload_matrix(struct pipe_context *pipe);
76
77/* init an idct instance */
78bool 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 */
84void vl_idct_cleanup(struct vl_idct *idct);
85
86/* init a buffer assosiated with agiven idct instance */
87bool 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 */
91void 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 */
94void 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 */
97void vl_idct_add_block(struct vl_idct_buffer *buffer, unsigned x, unsigned y, short *block);
98
99/* unmaps the buffers before flushing */
100void 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 */
103void vl_idct_flush(struct vl_idct *idct, struct vl_idct_buffer *buffer, unsigned num_verts);
104
105#endif
106