src/gallium/auxiliary/vl/vl_idct.h

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