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  */
38 struct 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_mismatch, *fs_mismatch;
52    void *vs, *fs;
53 
54    struct pipe_sampler_view *matrix;
55    struct pipe_sampler_view *transpose;
56 };
57 
58 /* a set of buffers to work with */
59 struct vl_idct_buffer
60 {
61    struct pipe_viewport_state viewport_mismatch;
62    struct pipe_viewport_state viewport;
63 
64    struct pipe_framebuffer_state fb_state_mismatch;
65    struct pipe_framebuffer_state fb_state;
66 
67    union
68    {
69       struct pipe_sampler_view *all[4];
70       struct pipe_sampler_view *stage[2][2];
71       struct {
72          struct pipe_sampler_view *source, *matrix;
73          struct pipe_sampler_view *intermediate, *transpose;
74       } individual;
75    } sampler_views;
76 };
77 
78 /* upload the idct matrix, which can be shared by all idct instances of a pipe */
79 struct pipe_sampler_view *
80 vl_idct_upload_matrix(struct pipe_context *pipe, float scale);
81 
82 void
83 vl_idct_stage2_vert_shader(struct vl_idct *idct, struct ureg_program *shader,
84                            unsigned first_output, struct ureg_dst tex);
85 
86 void
87 vl_idct_stage2_frag_shader(struct vl_idct *idct, struct ureg_program *shader,
88                            unsigned first_input, struct ureg_dst fragment);
89 
90 /* init an idct instance */
91 bool
92 vl_idct_init(struct vl_idct *idct, struct pipe_context *pipe,
93              unsigned buffer_width, unsigned buffer_height,
94              unsigned nr_of_render_targets,
95              struct pipe_sampler_view *matrix,
96              struct pipe_sampler_view *transpose);
97 
98 /* destroy an idct instance */
99 void
100 vl_idct_cleanup(struct vl_idct *idct);
101 
102 /* init a buffer assosiated with agiven idct instance */
103 bool
104 vl_idct_init_buffer(struct vl_idct *idct, struct vl_idct_buffer *buffer,
105                     struct pipe_sampler_view *source,
106                     struct pipe_sampler_view *intermediate);
107 
108 /* cleanup a buffer of an idct instance */
109 void
110 vl_idct_cleanup_buffer(struct vl_idct_buffer *buffer);
111 
112 /* flush the buffer and start rendering, vertex buffers needs to be setup before calling this */
113 void
114 vl_idct_flush(struct vl_idct *idct, struct vl_idct_buffer *buffer, unsigned num_verts);
115 
116 void
117 vl_idct_prepare_stage2(struct vl_idct *idct, struct vl_idct_buffer *buffer);
118 
119 #endif
120