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28 * Program key structures.
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.
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.
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
47 enum PACKED gen6_gather_sampler_wa
{
48 WA_SIGN
= 1, /* whether we need to sign extend */
49 WA_8BIT
= 2, /* if we have an 8bit format needing wa */
50 WA_16BIT
= 4, /* if we have a 16bit format needing wa */
54 * Sampler information needed by VS, WM, and GS program cache keys.
56 struct brw_sampler_prog_key_data
{
58 * EXT_texture_swizzle and DEPTH_TEXTURE_MODE swizzles.
60 uint16_t swizzles
[MAX_SAMPLERS
];
62 uint32_t gl_clamp_mask
[3];
65 * For RG32F, gather4's channel select is broken.
67 uint32_t gather_channel_quirk_mask
;
70 * Whether this sampler uses the compressed multisample surface layout.
72 uint32_t compressed_multisample_layout_mask
;
75 * For Sandybridge, which shader w/a we need for gather quirks.
77 enum gen6_gather_sampler_wa gen6_gather_wa
[MAX_SAMPLERS
];
81 struct brw_vue_prog_key
{
82 unsigned program_string_id
;
85 * True if at least one clip flag is enabled, regardless of whether the
86 * shader uses clip planes or gl_ClipDistance.
88 bool userclip_active
:1;
91 * How many user clipping planes are being uploaded to the vertex shader as
94 unsigned nr_userclip_plane_consts
:4;
96 struct brw_sampler_prog_key_data tex
;
99 /** The program key for Vertex Shaders. */
100 struct brw_vs_prog_key
{
101 struct brw_vue_prog_key base
;
104 * Per-attribute workaround flags
106 uint8_t gl_attrib_wa_flags
[VERT_ATTRIB_MAX
];
108 bool copy_edgeflag
:1;
110 bool clamp_vertex_color
:1;
113 * For pre-Gen6 hardware, a bitfield indicating which texture coordinates
114 * are going to be replaced with point coordinates (as a consequence of a
115 * call to glTexEnvi(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_TRUE)). Because
116 * our SF thread requires exact matching between VS outputs and FS inputs,
117 * these texture coordinates will need to be unconditionally included in
118 * the VUE, even if they aren't written by the vertex shader.
120 uint8_t point_coord_replace
;
123 /** The program key for Geometry Shaders. */
124 struct brw_gs_prog_key
126 struct brw_vue_prog_key base
;
128 uint64_t input_varyings
;
131 /** The program key for Fragment/Pixel Shaders. */
132 struct brw_wm_prog_key
{
136 bool persample_shading
:1;
138 unsigned nr_color_regions
:5;
139 bool replicate_alpha
:1;
140 bool render_to_fbo
:1;
141 bool clamp_fragment_color
:1;
142 bool compute_pos_offset
:1;
143 bool compute_sample_id
:1;
145 bool high_quality_derivatives
:1;
147 uint16_t drawable_height
;
148 uint64_t input_slots_valid
;
149 unsigned program_string_id
;
150 GLenum alpha_test_func
; /* < For Gen4/5 MRT alpha test */
151 float alpha_test_ref
;
153 struct brw_sampler_prog_key_data tex
;
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
);
172 brw_mark_surface_used(struct brw_stage_prog_data
*prog_data
,
173 unsigned surf_index
);
176 brw_stage_prog_data_compare(const struct brw_stage_prog_data
*a
,
177 const struct brw_stage_prog_data
*b
);
180 brw_stage_prog_data_free(const void *prog_data
);
183 brw_dump_ir(const char *stage
, struct gl_shader_program
*shader_prog
,
184 struct gl_shader
*shader
, struct gl_program
*prog
);