src/gallium/drivers/r300/r300_fs.h

   1 /*
   2  * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
   3  *                Joakim Sindholt <opensource@zhasha.com>
   4  * Copyright 2009 Marek Olšák <maraeo@gmail.com>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * on the rights to use, copy, modify, merge, publish, distribute, sub
  10  * license, and/or sell copies of the Software, and to permit persons to whom
  11  * the Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  20  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  21  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  22  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  23  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  24
  25 #ifndef R300_FS_H
  26 #define R300_FS_H
  27
  28 #include "pipe/p_state.h"
  29 #include "tgsi/tgsi_scan.h"
  30 #include "radeon_code.h"
  31 #include "r300_shader_semantics.h"
  32
  33 struct r300_fragment_shader_code {
  34     struct r300_fragment_program_external_state compare_state;
  35     struct rX00_fragment_program_code code;
  36
  37     struct r300_fragment_shader_code* next;
  38 };
  39
  40 struct r300_fragment_shader {
  41     /* Parent class */
  42     struct pipe_shader_state state;
  43
  44     struct tgsi_shader_info info;
  45     struct r300_shader_semantics inputs;
  46
  47     /* Bits 0-15: TRUE if it's a shadow sampler, FALSE otherwise. */
  48     unsigned shadow_samplers;
  49
  50     /* Currently-bound fragment shader. */
  51     struct r300_fragment_shader_code* shader;
  52
  53     /* List of the same shaders compiled with different texture-compare
  54      * states. */
  55     struct r300_fragment_shader_code* first;
  56 };
  57
  58 void r300_shader_read_fs_inputs(struct tgsi_shader_info* info,
  59                                 struct r300_shader_semantics* fs_inputs);
  60
  61 /* Return TRUE if the shader was switched and should be re-emitted. */
  62 boolean r300_pick_fragment_shader(struct r300_context* r300);
  63
  64 static INLINE boolean r300_fragment_shader_writes_depth(struct r300_fragment_shader *fs)
  65 {
  66     if (!fs)
  67         return FALSE;
  68     return (fs->shader->code.writes_depth) ? TRUE : FALSE;
  69 }
  70
  71 #endif /* R300_FS_H */