vl_idct.h revision 7f04fe5338d0846ec9a6003033da5357d2785c8b 
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#include <tgsi/tgsi_ureg.h>
34
35/* shader based inverse distinct cosinus transformation
36 * expect usage of vl_vertex_buffers as a todo list
37 */
38struct vl_idct
39{
40   struct pipe_context *pipe;
41
42   unsigned buffer_width;
43   unsigned buffer_height;
44   unsigned nr_of_render_targets;
45
46   void *rs_state;
47   void *blend;
48
49   void *samplers[2];
50
51   void *vs, *fs;
52
53   struct pipe_sampler_view *matrix;
54   struct pipe_sampler_view *transpose;
55};
56
57/* a set of buffers to work with */
58struct vl_idct_buffer
59{
60   struct pipe_viewport_state viewport;
61   struct pipe_framebuffer_state fb_state;
62
63   union
64   {
65      struct pipe_sampler_view *all[4];
66      struct pipe_sampler_view *stage[2][2];
67      struct {
68         struct pipe_sampler_view *matrix, *source;
69         struct pipe_sampler_view *transpose, *intermediate;
70      } individual;
71   } sampler_views;
72};
73
74/* upload the idct matrix, which can be shared by all idct instances of a pipe */
75struct pipe_sampler_view *
76vl_idct_upload_matrix(struct pipe_context *pipe, float scale);
77
78void
79vl_idct_stage2_vert_shader(struct vl_idct *idct, struct ureg_program *shader,
80                           unsigned first_output, struct ureg_dst tex);
81
82void
83vl_idct_stage2_frag_shader(struct vl_idct *idct, struct ureg_program *shader,
84                           unsigned first_input, struct ureg_dst fragment);
85
86/* init an idct instance */
87bool
88vl_idct_init(struct vl_idct *idct, struct pipe_context *pipe,
89             unsigned buffer_width, unsigned buffer_height,
90             unsigned nr_of_render_targets,
91             struct pipe_sampler_view *matrix,
92             struct pipe_sampler_view *transpose);
93
94/* destroy an idct instance */
95void
96vl_idct_cleanup(struct vl_idct *idct);
97
98/* init a buffer assosiated with agiven idct instance */
99bool
100vl_idct_init_buffer(struct vl_idct *idct, struct vl_idct_buffer *buffer,
101                    struct pipe_sampler_view *source,
102                    struct pipe_sampler_view *intermediate,
103                    struct pipe_surface *destination);
104
105/* cleanup a buffer of an idct instance */
106void
107vl_idct_cleanup_buffer(struct vl_idct *idct, struct vl_idct_buffer *buffer);
108
109/* flush the buffer and start rendering, vertex buffers needs to be setup before calling this */
110void
111vl_idct_flush(struct vl_idct *idct, struct vl_idct_buffer *buffer, unsigned num_verts);
112
113void
114vl_idct_prepare_stage2(struct vl_idct *idct, struct vl_idct_buffer *buffer);
115
116#endif
117