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 VMWARE 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