src/mesa/drivers/dri/i965/brw_wm.h

   1 /*
   2  Copyright (C) Intel Corp.  2006.  All Rights Reserved.
   3  Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
   4  develop this 3D driver.
   5
   6  Permission is hereby granted, free of charge, to any person obtaining
   7  a copy of this software and associated documentation files (the
   8  "Software"), to deal in the Software without restriction, including
   9  without limitation the rights to use, copy, modify, merge, publish,
  10  distribute, sublicense, and/or sell copies of the Software, and to
  11  permit persons to whom the Software is furnished to do so, subject to
  12  the following conditions:
  13
  14  The above copyright notice and this permission notice (including the
  15  next paragraph) shall be included in all copies or substantial
  16  portions of the Software.
  17
  18  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26  **********************************************************************/
  27  /*
  28   * Authors:
  29   *   Keith Whitwell <keith@tungstengraphics.com>
  30   */
  31
  32
  33 #ifndef BRW_WM_H
  34 #define BRW_WM_H
  35
  36 #include <stdbool.h>
  37
  38 #include "program/prog_instruction.h"
  39 #include "brw_context.h"
  40 #include "brw_eu.h"
  41 #include "brw_program.h"
  42
  43 /* A big lookup table is used to figure out which and how many
  44  * additional regs will inserted before the main payload in the WM
  45  * program execution.  These mainly relate to depth and stencil
  46  * processing and the early-depth-test optimization.
  47  */
  48 #define IZ_PS_KILL_ALPHATEST_BIT    0x1
  49 #define IZ_PS_COMPUTES_DEPTH_BIT    0x2
  50 #define IZ_DEPTH_WRITE_ENABLE_BIT   0x4
  51 #define IZ_DEPTH_TEST_ENABLE_BIT    0x8
  52 #define IZ_STENCIL_WRITE_ENABLE_BIT 0x10
  53 #define IZ_STENCIL_TEST_ENABLE_BIT  0x20
  54 #define IZ_BIT_MAX                  0x40
  55
  56 #define AA_NEVER     0
  57 #define AA_SOMETIMES 1
  58 #define AA_ALWAYS    2
  59
  60 struct brw_wm_prog_key {
  61    uint8_t iz_lookup;
  62    GLuint stats_wm:1;
  63    GLuint flat_shade:1;
  64    GLuint nr_color_regions:5;
  65    GLuint replicate_alpha:1;
  66    GLuint render_to_fbo:1;
  67    GLuint clamp_fragment_color:1;
  68    GLuint compute_pos_offset:1;
  69    GLuint compute_sample_id:1;
  70    GLuint line_aa:2;
  71    GLuint high_quality_derivatives:1;
  72
  73    GLushort drawable_height;
  74    GLbitfield64 input_slots_valid;
  75    GLuint program_string_id:32;
  76    GLenum alpha_test_func;          /* < For Gen4/5 MRT alpha test */
  77    float alpha_test_ref;
  78
  79    struct brw_sampler_prog_key_data tex;
  80 };
  81
  82 struct brw_wm_compile {
  83    struct brw_wm_prog_key key;
  84    struct brw_wm_prog_data prog_data;
  85
  86    uint8_t source_depth_reg;
  87    uint8_t source_w_reg;
  88    uint8_t aa_dest_stencil_reg;
  89    uint8_t dest_depth_reg;
  90    uint8_t sample_pos_reg;
  91    uint8_t sample_mask_reg;
  92    uint8_t barycentric_coord_reg[BRW_WM_BARYCENTRIC_INTERP_MODE_COUNT];
  93    uint8_t nr_payload_regs;
  94    GLuint source_depth_to_render_target:1;
  95    GLuint runtime_check_aads_emit:1;
  96
  97    GLuint last_scratch;
  98 };
  99
 100 /**
 101  * Compile a fragment shader.
 102  *
 103  * Returns the final assembly and the program's size.
 104  */
 105 const unsigned *brw_wm_fs_emit(struct brw_context *brw,
 106                                struct brw_wm_compile *c,
 107                                struct gl_fragment_program *fp,
 108                                struct gl_shader_program *prog,
 109                                unsigned *final_assembly_size);
 110
 111 GLboolean brw_link_shader(struct gl_context *ctx, struct gl_shader_program *prog);
 112 struct gl_shader *brw_new_shader(struct gl_context *ctx, GLuint name, GLuint type);
 113 struct gl_shader_program *brw_new_shader_program(struct gl_context *ctx, GLuint name);
 114
 115 bool brw_color_buffer_write_enabled(struct brw_context *brw);
 116 bool do_wm_prog(struct brw_context *brw,
 117                 struct gl_shader_program *prog,
 118                 struct brw_fragment_program *fp,
 119                 struct brw_wm_prog_key *key);
 120 void brw_wm_debug_recompile(struct brw_context *brw,
 121                             struct gl_shader_program *prog,
 122                             const struct brw_wm_prog_key *key);
 123 bool brw_wm_prog_data_compare(const void *a, const void *b);
 124 void brw_wm_prog_data_free(const void *in_prog_data);
 125
 126 #endif