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      1 /*
      2  * Copyright 2008 Corbin Simpson <MostAwesomeDude (at) gmail.com>
      3  *                Joakim Sindholt <opensource (at) zhasha.com>
      4  * Copyright 2009 Marek Olk <maraeo (at) 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 "compiler/radeon_code.h"
     31 #include "r300_shader_semantics.h"
     32 
     33 struct r300_fragment_shader_code {
     34     struct rX00_fragment_program_code code;
     35     struct tgsi_shader_info info;
     36     struct r300_shader_semantics inputs;
     37 
     38     /* Whether the shader was replaced by a dummy one due to a shader
     39      * compilation failure. */
     40     boolean dummy;
     41 
     42     /* Numbers of constants for each type. */
     43     unsigned externals_count;
     44     unsigned immediates_count;
     45     unsigned rc_state_count;
     46 
     47     /* Registers for fragment depth output setup. */
     48     uint32_t fg_depth_src;      /* R300_FG_DEPTH_SRC: 0x4bd8 */
     49     uint32_t us_out_w;          /* R300_US_W_FMT:     0x46b4 */
     50 
     51     struct r300_fragment_program_external_state compare_state;
     52 
     53     unsigned cb_code_size;
     54     uint32_t *cb_code;
     55 
     56     struct r300_fragment_shader_code* next;
     57 
     58     boolean write_all;
     59 
     60 };
     61 
     62 struct r300_fragment_shader {
     63     /* Parent class */
     64     struct pipe_shader_state state;
     65 
     66     /* Currently-bound fragment shader. */
     67     struct r300_fragment_shader_code* shader;
     68 
     69     /* List of the same shaders compiled with different texture-compare
     70      * states. */
     71     struct r300_fragment_shader_code* first;
     72 };
     73 
     74 void r300_shader_read_fs_inputs(struct tgsi_shader_info* info,
     75                                 struct r300_shader_semantics* fs_inputs);
     76 
     77 /* Return TRUE if the shader was switched and should be re-emitted. */
     78 boolean r300_pick_fragment_shader(struct r300_context* r300);
     79 
     80 static inline boolean r300_fragment_shader_writes_depth(struct r300_fragment_shader *fs)
     81 {
     82     if (!fs)
     83         return FALSE;
     84     return (fs->shader->code.writes_depth) ? TRUE : FALSE;
     85 }
     86 
     87 static inline boolean r300_fragment_shader_writes_all(struct r300_fragment_shader *fs)
     88 {
     89     if (!fs)
     90         return FALSE;
     91     return (fs->shader->write_all) ? TRUE : FALSE;
     92 }
     93 #endif /* R300_FS_H */
     94