1 /**************************************************************************
2  *
3  * Copyright 2011 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_zscan_h
29 #define vl_zscan_h
30 
31 #include "pipe/p_compiler.h"
32 #include "pipe/p_state.h"
33 
34 /*
35  * shader based zscan and quantification
36  * expect usage of vl_vertex_buffers as a todo list
37  */
38 struct vl_zscan
39 {
40    struct pipe_context *pipe;
41 
42    unsigned buffer_width;
43    unsigned buffer_height;
44 
45    unsigned num_channels;
46 
47    unsigned blocks_per_line;
48    unsigned blocks_total;
49 
50    void *rs_state;
51    void *blend;
52 
53    void *samplers[3];
54 
55    void *vs, *fs;
56 };
57 
58 struct vl_zscan_buffer
59 {
60    struct pipe_viewport_state viewport;
61    struct pipe_framebuffer_state fb_state;
62 
63    struct pipe_sampler_view *src, *layout, *quant;
64    struct pipe_surface *dst;
65 };
66 
67 extern const int vl_zscan_linear[];
68 extern const int vl_zscan_normal[];
69 extern const int vl_zscan_alternate[];
70 
71 struct pipe_sampler_view *
72 vl_zscan_layout(struct pipe_context *pipe, const int layout[64], unsigned blocks_per_line);
73 
74 bool
75 vl_zscan_init(struct vl_zscan *zscan, struct pipe_context *pipe,
76               unsigned buffer_width, unsigned buffer_height,
77               unsigned blocks_per_line, unsigned blocks_total,
78               unsigned num_channels);
79 
80 void
81 vl_zscan_cleanup(struct vl_zscan *zscan);
82 
83 bool
84 vl_zscan_init_buffer(struct vl_zscan *zscan, struct vl_zscan_buffer *buffer,
85                      struct pipe_sampler_view *src, struct pipe_surface *dst);
86 
87 void
88 vl_zscan_cleanup_buffer(struct vl_zscan_buffer *buffer);
89 
90 void
91 vl_zscan_set_layout(struct vl_zscan_buffer *buffer, struct pipe_sampler_view *layout);
92 
93 void
94 vl_zscan_upload_quant(struct vl_zscan *zscan, struct vl_zscan_buffer *buffer,
95                       const uint8_t matrix[64], bool intra);
96 
97 void
98 vl_zscan_render(struct vl_zscan *zscan, struct vl_zscan_buffer *buffer, unsigned num_instances);
99 
100 #endif
101