src/gallium/drivers/svga/svga_tgsi.h

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 #ifndef SVGA_TGSI_H
  27 #define SVGA_TGSI_H
  28
  29 #include "pipe/p_state.h"
  30
  31 #include "svga_hw_reg.h"
  32
  33 struct svga_fragment_shader;
  34 struct svga_vertex_shader;
  35 struct svga_shader;
  36 struct tgsi_shader_info;
  37 struct tgsi_token;
  38
  39
  40 struct svga_vs_compile_key
  41 {
  42    unsigned zero_stride_vertex_elements;
  43    unsigned need_prescale:1;
  44    unsigned allow_psiz:1;
  45    unsigned num_zero_stride_vertex_elements:6;
  46 };
  47
  48 struct svga_fs_compile_key
  49 {
  50    unsigned light_twoside:1;
  51    unsigned front_cw:1;
  52    unsigned num_textures:8;
  53    unsigned num_unnormalized_coords:8;
  54    struct {
  55       unsigned compare_mode:1;
  56       unsigned compare_func:3;
  57       unsigned unnormalized:1;
  58       unsigned width_height_idx:7;
  59       ubyte texture_target;
  60    } tex[PIPE_MAX_SAMPLERS];
  61 };
  62
  63 union svga_compile_key {
  64    struct svga_vs_compile_key vkey;
  65    struct svga_fs_compile_key fkey;
  66 };
  67
  68 struct svga_shader_result
  69 {
  70    const struct svga_shader *shader;
  71
  72    /* Parameters used to generate this compilation result:
  73     */
  74    union svga_compile_key key;
  75
  76    /* Compiled shader tokens:
  77     */
  78    const unsigned *tokens;
  79    unsigned nr_tokens;
  80
  81    /* SVGA Shader ID:
  82     */
  83    unsigned id;
  84
  85    /* Next compilation result:
  86     */
  87    struct svga_shader_result *next;
  88 };
  89
  90
  91 /* TGSI doesn't provide use with VS input semantics (they're actually
  92  * pretty meaningless), so we just generate some plausible ones here.
  93  * This is called both from within the TGSI translator and when
  94  * building vdecls to ensure they match up.
  95  *
  96  * The real use of this information is matching vertex elements to
  97  * fragment shader inputs in the case where vertex shader is disabled.
  98  */
  99 static INLINE void svga_generate_vdecl_semantics( unsigned idx,
 100                                                   unsigned *usage,
 101                                                   unsigned *usage_index )
 102 {
 103    if (idx == 0) {
 104       *usage = SVGA3D_DECLUSAGE_POSITION;
 105       *usage_index = 0;
 106    }
 107    else {
 108       *usage = SVGA3D_DECLUSAGE_TEXCOORD;
 109       *usage_index = idx - 1;
 110    }
 111 }
 112
 113
 114
 115 static INLINE unsigned svga_vs_key_size( const struct svga_vs_compile_key *key )
 116 {
 117    return sizeof *key;
 118 }
 119
 120 static INLINE unsigned svga_fs_key_size( const struct svga_fs_compile_key *key )
 121 {
 122    return (const char *)&key->tex[key->num_textures].texture_target -
 123       (const char *)key;
 124 }
 125
 126 struct svga_shader_result *
 127 svga_translate_fragment_program( const struct svga_fragment_shader *fs,
 128                                  const struct svga_fs_compile_key *fkey );
 129
 130 struct svga_shader_result *
 131 svga_translate_vertex_program( const struct svga_vertex_shader *fs,
 132                                const struct svga_vs_compile_key *vkey );
 133
 134
 135 void svga_destroy_shader_result( struct svga_shader_result *result );
 136
 137 #endif