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    unsigned adjust_attrib_range:16;
  53    unsigned adjust_attrib_w_1:16;
  54 };
  55
  56 struct svga_fs_compile_key
  57 {
  58    unsigned light_twoside:1;
  59    unsigned front_ccw:1;
  60    unsigned white_fragments:1;
  61    unsigned write_color0_to_n_cbufs:3;
  62    unsigned num_textures:8;
  63    unsigned num_unnormalized_coords:8;
  64    unsigned sprite_origin_lower_left:1;
  65    struct {
  66       unsigned compare_mode:1;
  67       unsigned compare_func:3;
  68       unsigned unnormalized:1;
  69       unsigned width_height_idx:7;
  70       unsigned texture_target:8;
  71       unsigned sprite_texgen:1;
  72       unsigned swizzle_r:3;
  73       unsigned swizzle_g:3;
  74       unsigned swizzle_b:3;
  75       unsigned swizzle_a:3;
  76    } tex[PIPE_MAX_SAMPLERS];
  77 };
  78
  79 /**
  80  * Key/index for identifying shader variants.
  81  */
  82 struct svga_compile_key {
  83    struct svga_vs_compile_key vkey;
  84    struct svga_fs_compile_key fkey;
  85    int8_t generic_remap_table[MAX_GENERIC_VARYING];
  86 };
  87
  88
  89 /**
  90  * A single TGSI shader may be compiled into different variants of
  91  * SVGA3D shaders depending on the compile key.  Each user shader
  92  * will have a linked list of these variants.
  93  */
  94 struct svga_shader_variant
  95 {
  96    const struct svga_shader *shader;
  97
  98    /** Parameters used to generate this variant */
  99    struct svga_compile_key key;
 100
 101    /* Compiled shader tokens:
 102     */
 103    const unsigned *tokens;
 104    unsigned nr_tokens;
 105
 106    /** Per-context shader identifier used with SVGA_3D_CMD_SHADER_DEFINE,
 107     * SVGA_3D_CMD_SET_SHADER and SVGA_3D_CMD_SHADER_DESTROY.
 108     */
 109    unsigned id;
 110
 111    /* GB object buffer containing the bytecode */
 112    struct svga_winsys_gb_shader *gb_shader;
 113
 114    /** Next variant */
 115    struct svga_shader_variant *next;
 116 };
 117
 118
 119 /* TGSI doesn't provide use with VS input semantics (they're actually
 120  * pretty meaningless), so we just generate some plausible ones here.
 121  * This is called both from within the TGSI translator and when
 122  * building vdecls to ensure they match up.
 123  *
 124  * The real use of this information is matching vertex elements to
 125  * fragment shader inputs in the case where vertex shader is disabled.
 126  */
 127 static inline void svga_generate_vdecl_semantics( unsigned idx,
 128                                                   unsigned *usage,
 129                                                   unsigned *usage_index )
 130 {
 131    if (idx == 0) {
 132       *usage = SVGA3D_DECLUSAGE_POSITION;
 133       *usage_index = 0;
 134    }
 135    else {
 136       *usage = SVGA3D_DECLUSAGE_TEXCOORD;
 137       *usage_index = idx - 1;
 138    }
 139 }
 140
 141
 142
 143 static inline unsigned svga_vs_key_size( const struct svga_vs_compile_key *key )
 144 {
 145    return sizeof *key;
 146 }
 147
 148 static inline unsigned svga_fs_key_size( const struct svga_fs_compile_key *key )
 149 {
 150    return (const char *)&key->tex[key->num_textures] - (const char *)key;
 151 }
 152
 153 struct svga_shader_variant *
 154 svga_translate_fragment_program( const struct svga_fragment_shader *fs,
 155                                  const struct svga_fs_compile_key *fkey );
 156
 157 struct svga_shader_variant *
 158 svga_translate_vertex_program( const struct svga_vertex_shader *fs,
 159                                const struct svga_vs_compile_key *vkey );
 160
 161
 162 unsigned
 163 svga_get_generic_inputs_mask(const struct tgsi_shader_info *info);
 164
 165 unsigned
 166 svga_get_generic_outputs_mask(const struct tgsi_shader_info *info);
 167
 168 void
 169 svga_remap_generics(unsigned generics_mask,
 170                     int8_t remap_table[MAX_GENERIC_VARYING]);
 171
 172 int
 173 svga_remap_generic_index(int8_t remap_table[MAX_GENERIC_VARYING],
 174                          int generic_index);
 175
 176 #endif