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, *fs;
  52
  53    struct pipe_sampler_view *matrix;
  54    struct pipe_sampler_view *transpose;
  55 };
  56
  57 /* a set of buffers to work with */
  58 struct 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 */
  75 struct pipe_sampler_view *
  76 vl_idct_upload_matrix(struct pipe_context *pipe, float scale);
  77
  78 void
  79 vl_idct_stage2_vert_shader(struct vl_idct *idct, struct ureg_program *shader,
  80                            unsigned first_output, struct ureg_dst tex);
  81
  82 void
  83 vl_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 */
  87 bool
  88 vl_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 */
  95 void
  96 vl_idct_cleanup(struct vl_idct *idct);
  97
  98 /* init a buffer assosiated with agiven idct instance */
  99 bool
 100 vl_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 */
 106 void
 107 vl_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 */
 110 void
 111 vl_idct_flush(struct vl_idct *idct, struct vl_idct_buffer *buffer, unsigned num_verts);
 112
 113 void
 114 vl_idct_prepare_stage2(struct vl_idct *idct, struct vl_idct_buffer *buffer);
 115
 116 #endif