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    ubyte need_prescale:1;
  43    ubyte allow_psiz:1;
  44    unsigned zero_stride_vertex_elements;
  45    ubyte num_zero_stride_vertex_elements:6;
  46 };
  47
  48 struct svga_fs_compile_key
  49 {
  50    boolean light_twoside:1;
  51    boolean front_cw:1;
  52    ubyte num_textures;
  53    ubyte num_unnormalized_coords;
  54    struct {
  55       ubyte compare_mode       : 1;
  56       ubyte compare_func       : 3;
  57       ubyte unnormalized       : 1;
  58
  59       ubyte width_height_idx   : 7;
  60
  61       ubyte texture_target;
  62    } tex[PIPE_MAX_SAMPLERS];
  63 };
  64
  65 union svga_compile_key {
  66    struct svga_vs_compile_key vkey;
  67    struct svga_fs_compile_key fkey;
  68 };
  69
  70 struct svga_shader_result
  71 {
  72    const struct svga_shader *shader;
  73
  74    /* Parameters used to generate this compilation result:
  75     */
  76    union svga_compile_key key;
  77
  78    /* Compiled shader tokens:
  79     */
  80    const unsigned *tokens;
  81    unsigned nr_tokens;
  82
  83    /* SVGA Shader ID:
  84     */
  85    unsigned id;
  86
  87    /* Next compilation result:
  88     */
  89    struct svga_shader_result *next;
  90 };
  91
  92
  93 /* TGSI doesn't provide use with VS input semantics (they're actually
  94  * pretty meaningless), so we just generate some plausible ones here.
  95  * This is called both from within the TGSI translator and when
  96  * building vdecls to ensure they match up.
  97  *
  98  * The real use of this information is matching vertex elements to
  99  * fragment shader inputs in the case where vertex shader is disabled.
 100  */
 101 static INLINE void svga_generate_vdecl_semantics( unsigned idx,
 102                                                   unsigned *usage,
 103                                                   unsigned *usage_index )
 104 {
 105    if (idx == 0) {
 106       *usage = SVGA3D_DECLUSAGE_POSITION;
 107       *usage_index = 0;
 108    }
 109    else {
 110       *usage = SVGA3D_DECLUSAGE_TEXCOORD;
 111       *usage_index = idx - 1;
 112    }
 113 }
 114
 115
 116
 117 static INLINE unsigned svga_vs_key_size( const struct svga_vs_compile_key *key )
 118 {
 119    return sizeof *key;
 120 }
 121
 122 static INLINE unsigned svga_fs_key_size( const struct svga_fs_compile_key *key )
 123 {
 124    return (const char *)&key->tex[key->num_textures].texture_target -
 125       (const char *)key;
 126 }
 127
 128 struct svga_shader_result *
 129 svga_translate_fragment_program( const struct svga_fragment_shader *fs,
 130                                  const struct svga_fs_compile_key *fkey );
 131
 132 struct svga_shader_result *
 133 svga_translate_vertex_program( const struct svga_vertex_shader *fs,
 134                                const struct svga_vs_compile_key *vkey );
 135
 136
 137 void svga_destroy_shader_result( struct svga_shader_result *result );
 138
 139 #endif