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
  34 /**
  35  * We use a 32-bit mask to keep track of the generic indexes.
  36  */
  37 #define MAX_GENERIC_VARYING 32
  38
  39
  40 struct svga_fragment_shader;
  41 struct svga_vertex_shader;
  42 struct svga_shader;
  43 struct tgsi_shader_info;
  44 struct tgsi_token;
  45
  46
  47 struct svga_vs_compile_key
  48 {
  49    unsigned fs_generic_inputs;
  50    unsigned need_prescale:1;
  51    unsigned allow_psiz:1;
  52 };
  53
  54 struct svga_fs_compile_key
  55 {
  56    unsigned light_twoside:1;
  57    unsigned front_ccw:1;
  58    unsigned white_fragments:1;
  59    unsigned write_color0_to_n_cbufs:3;
  60    unsigned num_textures:8;
  61    unsigned num_unnormalized_coords:8;
  62    unsigned sprite_origin_lower_left:1;
  63    struct {
  64       unsigned compare_mode:1;
  65       unsigned compare_func:3;
  66       unsigned unnormalized:1;
  67       unsigned width_height_idx:7;
  68       unsigned texture_target:8;
  69       unsigned sprite_texgen:1;
  70       unsigned swizzle_r:3;
  71       unsigned swizzle_g:3;
  72       unsigned swizzle_b:3;
  73       unsigned swizzle_a:3;
  74    } tex[PIPE_MAX_SAMPLERS];
  75 };
  76
  77 /**
  78  * Key/index for identifying shader variants.
  79  */
  80 struct svga_compile_key {
  81    struct svga_vs_compile_key vkey;
  82    struct svga_fs_compile_key fkey;
  83    int8_t generic_remap_table[MAX_GENERIC_VARYING];
  84 };
  85
  86
  87 /**
  88  * A single TGSI shader may be compiled into different variants of
  89  * SVGA3D shaders depending on the compile key.  Each user shader
  90  * will have a linked list of these variants.
  91  */
  92 struct svga_shader_variant
  93 {
  94    const struct svga_shader *shader;
  95
  96    /** Parameters used to generate this variant */
  97    struct svga_compile_key key;
  98
  99    /* Compiled shader tokens:
 100     */
 101    const unsigned *tokens;
 102    unsigned nr_tokens;
 103
 104    /** Per-context shader identifier used with SVGA_3D_CMD_SHADER_DEFINE,
 105     * SVGA_3D_CMD_SET_SHADER and SVGA_3D_CMD_SHADER_DESTROY.
 106     */
 107    unsigned id;
 108
 109    /* GB object buffer containing the bytecode */
 110    struct svga_winsys_gb_shader *gb_shader;
 111
 112    /** Next variant */
 113    struct svga_shader_variant *next;
 114 };
 115
 116
 117 /* TGSI doesn't provide use with VS input semantics (they're actually
 118  * pretty meaningless), so we just generate some plausible ones here.
 119  * This is called both from within the TGSI translator and when
 120  * building vdecls to ensure they match up.
 121  *
 122  * The real use of this information is matching vertex elements to
 123  * fragment shader inputs in the case where vertex shader is disabled.
 124  */
 125 static INLINE void svga_generate_vdecl_semantics( unsigned idx,
 126                                                   unsigned *usage,
 127                                                   unsigned *usage_index )
 128 {
 129    if (idx == 0) {
 130       *usage = SVGA3D_DECLUSAGE_POSITION;
 131       *usage_index = 0;
 132    }
 133    else {
 134       *usage = SVGA3D_DECLUSAGE_TEXCOORD;
 135       *usage_index = idx - 1;
 136    }
 137 }
 138
 139
 140
 141 static INLINE unsigned svga_vs_key_size( const struct svga_vs_compile_key *key )
 142 {
 143    return sizeof *key;
 144 }
 145
 146 static INLINE unsigned svga_fs_key_size( const struct svga_fs_compile_key *key )
 147 {
 148    return (const char *)&key->tex[key->num_textures] - (const char *)key;
 149 }
 150
 151 struct svga_shader_variant *
 152 svga_translate_fragment_program( const struct svga_fragment_shader *fs,
 153                                  const struct svga_fs_compile_key *fkey );
 154
 155 struct svga_shader_variant *
 156 svga_translate_vertex_program( const struct svga_vertex_shader *fs,
 157                                const struct svga_vs_compile_key *vkey );
 158
 159
 160 unsigned
 161 svga_get_generic_inputs_mask(const struct tgsi_shader_info *info);
 162
 163 unsigned
 164 svga_get_generic_outputs_mask(const struct tgsi_shader_info *info);
 165
 166 void
 167 svga_remap_generics(unsigned generics_mask,
 168                     int8_t remap_table[MAX_GENERIC_VARYING]);
 169
 170 int
 171 svga_remap_generic_index(int8_t remap_table[MAX_GENERIC_VARYING],
 172                          int generic_index);
 173
 174 #endif