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  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.