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

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #ifndef BRW_PROGRAM_H
  25 #define BRW_PROGRAM_H
  26
  27 /**
  28  * Program key structures.
  29  *
  30  * When drawing, we look for the currently bound shaders in the program
  31  * cache.  This is essentially a hash table lookup, and these are the keys.
  32  *
  33  * Sometimes OpenGL features specified as state need to be simulated via
  34  * shader code, due to a mismatch between the API and the hardware.  This
  35  * is often referred to as "non-orthagonal state" or "NOS".  We store NOS
  36  * in the program key so it's considered when searching for a program.  If
  37  * we haven't seen a particular combination before, we have to recompile a
  38  * new specialized version.
  39  *
  40  * Shader compilation should not look up state in gl_context directly, but
  41  * instead use the copy in the program key.  This guarantees recompiles will
  42  * happen correctly.
  43  *
  44  *  @{
  45  */
  46
  47 /**
  48  * Sampler information needed by VS, WM, and GS program cache keys.
  49  */
  50 struct brw_sampler_prog_key_data {
  51    /**
  52     * EXT_texture_swizzle and DEPTH_TEXTURE_MODE swizzles.
  53     */
  54    uint16_t swizzles[MAX_SAMPLERS];
  55
  56    uint32_t gl_clamp_mask[3];
  57
  58    /**
  59     * For RG32F, gather4's channel select is broken.
  60     */
  61    uint32_t gather_channel_quirk_mask;
  62
  63    /**
  64     * Whether this sampler uses the compressed multisample surface layout.
  65     */
  66    uint32_t compressed_multisample_layout_mask;
  67
  68    /**
  69     * For Sandybridge, which shader w/a we need for gather quirks.
  70     */
  71    uint8_t gen6_gather_wa[MAX_SAMPLERS];
  72 };
  73
  74
  75 struct brw_vec4_prog_key {
  76    GLuint program_string_id;
  77
  78    /**
  79     * True if at least one clip flag is enabled, regardless of whether the
  80     * shader uses clip planes or gl_ClipDistance.
  81     */
  82    GLuint userclip_active:1;
  83
  84    /**
  85     * How many user clipping planes are being uploaded to the vertex shader as
  86     * push constants.
  87     */
  88    GLuint nr_userclip_plane_consts:4;
  89
  90    GLuint clamp_vertex_color:1;
  91
  92    struct brw_sampler_prog_key_data tex;
  93 };
  94
  95 /** The program key for Vertex Shaders. */
  96 struct brw_vs_prog_key {
  97    struct brw_vec4_prog_key base;
  98
  99    /*
 100     * Per-attribute workaround flags
 101     */
 102    uint8_t gl_attrib_wa_flags[VERT_ATTRIB_MAX];
 103
 104    GLuint copy_edgeflag:1;
 105
 106    /**
 107     * For pre-Gen6 hardware, a bitfield indicating which texture coordinates
 108     * are going to be replaced with point coordinates (as a consequence of a
 109     * call to glTexEnvi(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_TRUE)).  Because
 110     * our SF thread requires exact matching between VS outputs and FS inputs,
 111     * these texture coordinates will need to be unconditionally included in
 112     * the VUE, even if they aren't written by the vertex shader.
 113     */
 114    GLuint point_coord_replace:8;
 115 };
 116
 117 /** The program key for Geometry Shaders. */
 118 struct brw_gs_prog_key
 119 {
 120    struct brw_vec4_prog_key base;
 121
 122    GLbitfield64 input_varyings;
 123 };
 124
 125 /** The program key for Fragment/Pixel Shaders. */
 126 struct brw_wm_prog_key {
 127    uint8_t iz_lookup;
 128    GLuint stats_wm:1;
 129    GLuint flat_shade:1;
 130    GLuint persample_shading:1;
 131    GLuint persample_2x:1;
 132    GLuint nr_color_regions:5;
 133    GLuint replicate_alpha:1;
 134    GLuint render_to_fbo:1;
 135    GLuint clamp_fragment_color:1;
 136    GLuint compute_pos_offset:1;
 137    GLuint compute_sample_id:1;
 138    GLuint line_aa:2;
 139    GLuint high_quality_derivatives:1;
 140
 141    GLushort drawable_height;
 142    GLbitfield64 input_slots_valid;
 143    GLuint program_string_id:32;
 144    GLenum alpha_test_func;          /* < For Gen4/5 MRT alpha test */
 145    float alpha_test_ref;
 146
 147    struct brw_sampler_prog_key_data tex;
 148 };
 149
 150 /** @} */
 151
 152 enum gen6_gather_sampler_wa {
 153    WA_SIGN = 1,      /* whether we need to sign extend */
 154    WA_8BIT = 2,      /* if we have an 8bit format needing wa */
 155    WA_16BIT = 4,     /* if we have a 16bit format needing wa */
 156 };
 157
 158 #ifdef __cplusplus
 159 extern "C" {
 160 #endif
 161
 162 void brw_populate_sampler_prog_key_data(struct gl_context *ctx,
 163                                         const struct gl_program *prog,
 164                                         unsigned sampler_count,
 165                                         struct brw_sampler_prog_key_data *key);
 166 bool brw_debug_recompile_sampler_key(struct brw_context *brw,
 167                                      const struct brw_sampler_prog_key_data *old_key,
 168                                      const struct brw_sampler_prog_key_data *key);
 169 void brw_add_texrect_params(struct gl_program *prog);
 170
 171 void
 172 brw_mark_surface_used(struct brw_stage_prog_data *prog_data,
 173                       unsigned surf_index);
 174
 175 bool
 176 brw_stage_prog_data_compare(const struct brw_stage_prog_data *a,
 177                             const struct brw_stage_prog_data *b);
 178
 179 void
 180 brw_stage_prog_data_free(const void *prog_data);
 181
 182 void
 183 brw_dump_ir(const char *stage, struct gl_shader_program *shader_prog,
 184             struct gl_shader *shader, struct gl_program *prog);
 185
 186 #ifdef __cplusplus
 187 } /* extern "C" */
 188 #endif
 189
 190 #endif