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 white_fragments:1;
  53    unsigned num_textures:8;
  54    unsigned num_unnormalized_coords:8;
  55    struct {
  56       unsigned compare_mode:1;
  57       unsigned compare_func:3;
  58       unsigned unnormalized:1;
  59       unsigned width_height_idx:7;
  60       unsigned texture_target:8;
  61    } tex[PIPE_MAX_SAMPLERS];
  62 };
  63
  64 union svga_compile_key {
  65    struct svga_vs_compile_key vkey;
  66    struct svga_fs_compile_key fkey;
  67 };
  68
  69 struct svga_shader_result
  70 {
  71    const struct svga_shader *shader;
  72
  73    /* Parameters used to generate this compilation result:
  74     */
  75    union svga_compile_key key;
  76
  77    /* Compiled shader tokens:
  78     */
  79    const unsigned *tokens;
  80    unsigned nr_tokens;
  81
  82    /* SVGA Shader ID:
  83     */
  84    unsigned id;
  85
  86    /* Next compilation result:
  87     */
  88    struct svga_shader_result *next;
  89 };
  90
  91
  92 /* TGSI doesn't provide use with VS input semantics (they're actually
  93  * pretty meaningless), so we just generate some plausible ones here.
  94  * This is called both from within the TGSI translator and when
  95  * building vdecls to ensure they match up.
  96  *
  97  * The real use of this information is matching vertex elements to
  98  * fragment shader inputs in the case where vertex shader is disabled.
  99  */
 100 static INLINE void svga_generate_vdecl_semantics( unsigned idx,
 101                                                   unsigned *usage,
 102                                                   unsigned *usage_index )
 103 {
 104    if (idx == 0) {
 105       *usage = SVGA3D_DECLUSAGE_POSITION;
 106       *usage_index = 0;
 107    }
 108    else {
 109       *usage = SVGA3D_DECLUSAGE_TEXCOORD;
 110       *usage_index = idx - 1;
 111    }
 112 }
 113
 114
 115
 116 static INLINE unsigned svga_vs_key_size( const struct svga_vs_compile_key *key )
 117 {
 118    return sizeof *key;
 119 }
 120
 121 static INLINE unsigned svga_fs_key_size( const struct svga_fs_compile_key *key )
 122 {
 123    return (const char *)&key->tex[key->num_textures] - (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