1 /**************************************************************************
3 * Copyright 2007 VMware, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * 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, sub license, 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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
30 * Keith Whitwell <keithw@vmware.com>
34 #include "pipe/p_context.h"
35 #include "util/u_memory.h"
36 #include "util/u_math.h"
37 #include "util/u_cpu_detect.h"
38 #include "util/u_inlines.h"
39 #include "util/u_helpers.h"
40 #include "util/u_prim.h"
41 #include "util/u_format.h"
42 #include "draw_context.h"
43 #include "draw_pipe.h"
44 #include "draw_prim_assembler.h"
49 #include "gallivm/lp_bld_init.h"
50 #include "gallivm/lp_bld_limits.h"
51 #include "draw_llvm.h"
54 draw_get_option_use_llvm(void)
56 return debug_get_bool_option("DRAW_USE_LLVM", TRUE
);
60 draw_get_option_use_llvm(void)
68 * Create new draw module context with gallivm state for LLVM JIT.
70 static struct draw_context
*
71 draw_create_context(struct pipe_context
*pipe
, void *context
,
74 struct draw_context
*draw
= CALLOC_STRUCT( draw_context
);
78 /* we need correct cpu caps for disabling denorms in draw_vbo() */
82 if (try_llvm
&& draw_get_option_use_llvm()) {
83 draw
->llvm
= draw_llvm_create(draw
, (LLVMContextRef
)context
);
92 draw
->ia
= draw_prim_assembler_create(draw
);
106 * Create new draw module context, with LLVM JIT.
108 struct draw_context
*
109 draw_create(struct pipe_context
*pipe
)
111 return draw_create_context(pipe
, NULL
, TRUE
);
116 struct draw_context
*
117 draw_create_with_llvm_context(struct pipe_context
*pipe
,
120 return draw_create_context(pipe
, context
, TRUE
);
125 * Create a new draw context, without LLVM JIT.
127 struct draw_context
*
128 draw_create_no_llvm(struct pipe_context
*pipe
)
130 return draw_create_context(pipe
, NULL
, FALSE
);
134 boolean
draw_init(struct draw_context
*draw
)
137 * Note that several functions compute the clipmask of the predefined
138 * formats with hardcoded formulas instead of using these. So modifications
139 * here must be reflected there too.
142 ASSIGN_4V( draw
->plane
[0], -1, 0, 0, 1 );
143 ASSIGN_4V( draw
->plane
[1], 1, 0, 0, 1 );
144 ASSIGN_4V( draw
->plane
[2], 0, -1, 0, 1 );
145 ASSIGN_4V( draw
->plane
[3], 0, 1, 0, 1 );
146 ASSIGN_4V( draw
->plane
[4], 0, 0, 1, 1 ); /* yes these are correct */
147 ASSIGN_4V( draw
->plane
[5], 0, 0, -1, 1 ); /* mesa's a bit wonky */
148 draw
->clip_xy
= TRUE
;
151 draw
->pt
.user
.planes
= (float (*) [DRAW_TOTAL_CLIP_PLANES
][4]) &(draw
->plane
[0]);
152 draw
->pt
.user
.eltMax
= ~0;
154 if (!draw_pipeline_init( draw
))
157 if (!draw_pt_init( draw
))
160 if (!draw_vs_init( draw
))
163 if (!draw_gs_init( draw
))
166 draw
->quads_always_flatshade_last
= !draw
->pipe
->screen
->get_param(
167 draw
->pipe
->screen
, PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION
);
169 draw
->floating_point_depth
= false;
175 * Called whenever we're starting to draw a new instance.
176 * Some internal structures don't want to have to reset internal
177 * members on each invocation (because their state might have to persist
178 * between multiple primitive restart rendering call) but might have to
179 * for each new instance.
180 * This is particularly the case for primitive id's in geometry shader.
182 void draw_new_instance(struct draw_context
*draw
)
184 draw_geometry_shader_new_instance(draw
->gs
.geometry_shader
);
185 draw_prim_assembler_new_instance(draw
->ia
);
189 void draw_destroy( struct draw_context
*draw
)
191 struct pipe_context
*pipe
;
199 /* free any rasterizer CSOs that we may have created.
201 for (i
= 0; i
< 2; i
++) {
202 for (j
= 0; j
< 2; j
++) {
203 if (draw
->rasterizer_no_cull
[i
][j
]) {
204 pipe
->delete_rasterizer_state(pipe
, draw
->rasterizer_no_cull
[i
][j
]);
209 for (i
= 0; i
< draw
->pt
.nr_vertex_buffers
; i
++) {
210 pipe_resource_reference(&draw
->pt
.vertex_buffer
[i
].buffer
, NULL
);
213 /* Not so fast -- we're just borrowing this at the moment.
216 draw->render->destroy( draw->render );
219 draw_prim_assembler_destroy(draw
->ia
);
220 draw_pipeline_destroy( draw
);
221 draw_pt_destroy( draw
);
222 draw_vs_destroy( draw
);
223 draw_gs_destroy( draw
);
226 draw_llvm_destroy( draw
->llvm
);
234 void draw_flush( struct draw_context
*draw
)
236 draw_do_flush( draw
, DRAW_FLUSH_BACKEND
);
241 * Specify the depth stencil format for the draw pipeline. This function
242 * determines the Minimum Resolvable Depth factor for polygon offset.
243 * This factor potentially depends on the number of Z buffer bits,
244 * the rasterization algorithm and the arithmetic performed on Z
245 * values between vertex shading and rasterization.
247 void draw_set_zs_format(struct draw_context
*draw
, enum pipe_format format
)
249 const struct util_format_description
*desc
= util_format_description(format
);
251 draw
->floating_point_depth
=
252 (util_get_depth_format_type(desc
) == UTIL_FORMAT_TYPE_FLOAT
);
254 draw
->mrd
= util_get_depth_format_mrd(desc
);
259 draw_is_vs_window_space(struct draw_context
*draw
)
261 if (draw
->vs
.vertex_shader
) {
262 struct tgsi_shader_info
*info
= &draw
->vs
.vertex_shader
->info
;
264 return info
->properties
[TGSI_PROPERTY_VS_WINDOW_SPACE_POSITION
] != 0;
271 draw_update_clip_flags(struct draw_context
*draw
)
273 bool window_space
= draw_is_vs_window_space(draw
);
275 draw
->clip_xy
= !draw
->driver
.bypass_clip_xy
&& !window_space
;
276 draw
->guard_band_xy
= (!draw
->driver
.bypass_clip_xy
&&
277 draw
->driver
.guard_band_xy
);
278 draw
->clip_z
= (!draw
->driver
.bypass_clip_z
&&
279 draw
->rasterizer
&& draw
->rasterizer
->depth_clip
) &&
281 draw
->clip_user
= draw
->rasterizer
&&
282 draw
->rasterizer
->clip_plane_enable
!= 0 &&
284 draw
->guard_band_points_xy
= draw
->guard_band_xy
||
285 (draw
->driver
.bypass_clip_points
&&
287 draw
->rasterizer
->point_tri_clip
));
292 draw_update_viewport_flags(struct draw_context
*draw
)
294 bool window_space
= draw_is_vs_window_space(draw
);
296 draw
->bypass_viewport
= window_space
|| draw
->identity_viewport
;
301 * Register new primitive rasterization/rendering state.
302 * This causes the drawing pipeline to be rebuilt.
304 void draw_set_rasterizer_state( struct draw_context
*draw
,
305 const struct pipe_rasterizer_state
*raster
,
308 if (!draw
->suspend_flushing
) {
309 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
311 draw
->rasterizer
= raster
;
312 draw
->rast_handle
= rast_handle
;
313 draw_update_clip_flags(draw
);
317 /* With a little more work, llvmpipe will be able to turn this off and
318 * do its own x/y clipping.
320 * Some hardware can turn off clipping altogether - in particular any
321 * hardware with a TNL unit can do its own clipping, even if it is
322 * relying on the draw module for some other reason.
323 * Setting bypass_clip_points to achieve d3d-style point clipping (the driver
324 * will need to do the "vp scissoring") _requires_ the driver to implement
325 * wide points / point sprites itself (points will still be clipped if rasterizer
326 * point_tri_clip isn't set). Only relevant if bypass_clip_xy isn't set.
328 void draw_set_driver_clipping( struct draw_context
*draw
,
329 boolean bypass_clip_xy
,
330 boolean bypass_clip_z
,
331 boolean guard_band_xy
,
332 boolean bypass_clip_points
)
334 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
336 draw
->driver
.bypass_clip_xy
= bypass_clip_xy
;
337 draw
->driver
.bypass_clip_z
= bypass_clip_z
;
338 draw
->driver
.guard_band_xy
= guard_band_xy
;
339 draw
->driver
.bypass_clip_points
= bypass_clip_points
;
340 draw_update_clip_flags(draw
);
345 * Plug in the primitive rendering/rasterization stage (which is the last
346 * stage in the drawing pipeline).
347 * This is provided by the device driver.
349 void draw_set_rasterize_stage( struct draw_context
*draw
,
350 struct draw_stage
*stage
)
352 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
354 draw
->pipeline
.rasterize
= stage
;
359 * Set the draw module's clipping state.
361 void draw_set_clip_state( struct draw_context
*draw
,
362 const struct pipe_clip_state
*clip
)
364 draw_do_flush(draw
, DRAW_FLUSH_PARAMETER_CHANGE
);
366 memcpy(&draw
->plane
[6], clip
->ucp
, sizeof(clip
->ucp
));
371 * Set the draw module's viewport state.
373 void draw_set_viewport_states( struct draw_context
*draw
,
375 unsigned num_viewports
,
376 const struct pipe_viewport_state
*vps
)
378 const struct pipe_viewport_state
*viewport
= vps
;
379 draw_do_flush(draw
, DRAW_FLUSH_PARAMETER_CHANGE
);
381 debug_assert(start_slot
< PIPE_MAX_VIEWPORTS
);
382 debug_assert((start_slot
+ num_viewports
) <= PIPE_MAX_VIEWPORTS
);
384 memcpy(draw
->viewports
+ start_slot
, vps
,
385 sizeof(struct pipe_viewport_state
) * num_viewports
);
387 draw
->identity_viewport
= (num_viewports
== 1) &&
388 (viewport
->scale
[0] == 1.0f
&&
389 viewport
->scale
[1] == 1.0f
&&
390 viewport
->scale
[2] == 1.0f
&&
391 viewport
->translate
[0] == 0.0f
&&
392 viewport
->translate
[1] == 0.0f
&&
393 viewport
->translate
[2] == 0.0f
);
394 draw_update_viewport_flags(draw
);
400 draw_set_vertex_buffers(struct draw_context
*draw
,
401 unsigned start_slot
, unsigned count
,
402 const struct pipe_vertex_buffer
*buffers
)
404 assert(start_slot
+ count
<= PIPE_MAX_ATTRIBS
);
406 util_set_vertex_buffers_count(draw
->pt
.vertex_buffer
,
407 &draw
->pt
.nr_vertex_buffers
,
408 buffers
, start_slot
, count
);
413 draw_set_vertex_elements(struct draw_context
*draw
,
415 const struct pipe_vertex_element
*elements
)
417 assert(count
<= PIPE_MAX_ATTRIBS
);
419 /* We could improve this by only flushing the frontend and the fetch part
420 * of the middle. This would avoid recalculating the emit keys.*/
421 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
423 memcpy(draw
->pt
.vertex_element
, elements
, count
* sizeof(elements
[0]));
424 draw
->pt
.nr_vertex_elements
= count
;
429 * Tell drawing context where to find mapped vertex buffers.
432 draw_set_mapped_vertex_buffer(struct draw_context
*draw
,
433 unsigned attr
, const void *buffer
,
436 draw
->pt
.user
.vbuffer
[attr
].map
= buffer
;
437 draw
->pt
.user
.vbuffer
[attr
].size
= size
;
442 draw_set_mapped_constant_buffer(struct draw_context
*draw
,
443 unsigned shader_type
,
448 debug_assert(shader_type
== PIPE_SHADER_VERTEX
||
449 shader_type
== PIPE_SHADER_GEOMETRY
);
450 debug_assert(slot
< PIPE_MAX_CONSTANT_BUFFERS
);
452 draw_do_flush(draw
, DRAW_FLUSH_PARAMETER_CHANGE
);
454 switch (shader_type
) {
455 case PIPE_SHADER_VERTEX
:
456 draw
->pt
.user
.vs_constants
[slot
] = buffer
;
457 draw
->pt
.user
.vs_constants_size
[slot
] = size
;
459 case PIPE_SHADER_GEOMETRY
:
460 draw
->pt
.user
.gs_constants
[slot
] = buffer
;
461 draw
->pt
.user
.gs_constants_size
[slot
] = size
;
464 assert(0 && "invalid shader type in draw_set_mapped_constant_buffer");
470 * Tells the draw module to draw points with triangles if their size
471 * is greater than this threshold.
474 draw_wide_point_threshold(struct draw_context
*draw
, float threshold
)
476 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
477 draw
->pipeline
.wide_point_threshold
= threshold
;
482 * Should the draw module handle point->quad conversion for drawing sprites?
485 draw_wide_point_sprites(struct draw_context
*draw
, boolean draw_sprite
)
487 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
488 draw
->pipeline
.wide_point_sprites
= draw_sprite
;
493 * Tells the draw module to draw lines with triangles if their width
494 * is greater than this threshold.
497 draw_wide_line_threshold(struct draw_context
*draw
, float threshold
)
499 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
500 draw
->pipeline
.wide_line_threshold
= roundf(threshold
);
505 * Tells the draw module whether or not to implement line stipple.
508 draw_enable_line_stipple(struct draw_context
*draw
, boolean enable
)
510 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
511 draw
->pipeline
.line_stipple
= enable
;
516 * Tells draw module whether to convert points to quads for sprite mode.
519 draw_enable_point_sprites(struct draw_context
*draw
, boolean enable
)
521 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
522 draw
->pipeline
.point_sprite
= enable
;
527 draw_set_force_passthrough( struct draw_context
*draw
, boolean enable
)
529 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
530 draw
->force_passthrough
= enable
;
536 * Allocate an extra vertex/geometry shader vertex attribute, if it doesn't
539 * This is used by some of the optional draw module stages such
540 * as wide_point which may need to allocate additional generic/texcoord
544 draw_alloc_extra_vertex_attrib(struct draw_context
*draw
,
545 uint semantic_name
, uint semantic_index
)
551 slot
= draw_find_shader_output(draw
, semantic_name
, semantic_index
);
556 num_outputs
= draw_current_shader_outputs(draw
);
557 n
= draw
->extra_shader_outputs
.num
;
559 assert(n
< Elements(draw
->extra_shader_outputs
.semantic_name
));
561 draw
->extra_shader_outputs
.semantic_name
[n
] = semantic_name
;
562 draw
->extra_shader_outputs
.semantic_index
[n
] = semantic_index
;
563 draw
->extra_shader_outputs
.slot
[n
] = num_outputs
+ n
;
564 draw
->extra_shader_outputs
.num
++;
566 return draw
->extra_shader_outputs
.slot
[n
];
571 * Remove all extra vertex attributes that were allocated with
572 * draw_alloc_extra_vertex_attrib().
575 draw_remove_extra_vertex_attribs(struct draw_context
*draw
)
577 draw
->extra_shader_outputs
.num
= 0;
582 * If a geometry shader is present, return its info, else the vertex shader's
585 struct tgsi_shader_info
*
586 draw_get_shader_info(const struct draw_context
*draw
)
589 if (draw
->gs
.geometry_shader
) {
590 return &draw
->gs
.geometry_shader
->info
;
592 return &draw
->vs
.vertex_shader
->info
;
597 * Prepare outputs slots from the draw module
599 * Certain parts of the draw module can emit additional
600 * outputs that can be quite useful to the backends, a good
601 * example of it is the process of decomposing primitives
602 * into wireframes (aka. lines) which normally would lose
603 * the face-side information, but using this method we can
604 * inject another shader output which passes the original
605 * face side information to the backend.
608 draw_prepare_shader_outputs(struct draw_context
*draw
)
610 draw_remove_extra_vertex_attribs(draw
);
611 draw_prim_assembler_prepare_outputs(draw
->ia
);
612 draw_unfilled_prepare_outputs(draw
, draw
->pipeline
.unfilled
);
613 if (draw
->pipeline
.aapoint
)
614 draw_aapoint_prepare_outputs(draw
, draw
->pipeline
.aapoint
);
615 if (draw
->pipeline
.aaline
)
616 draw_aaline_prepare_outputs(draw
, draw
->pipeline
.aaline
);
620 * Ask the draw module for the location/slot of the given vertex attribute in
621 * a post-transformed vertex.
623 * With this function, drivers that use the draw module should have no reason
624 * to track the current vertex/geometry shader.
626 * Note that the draw module may sometimes generate vertices with extra
627 * attributes (such as texcoords for AA lines). The driver can call this
628 * function to find those attributes.
630 * -1 is returned if the attribute is not found since this is
631 * an undefined situation. Note, that zero is valid and can
632 * be used by any of the attributes, because position is not
633 * required to be attribute 0 or even at all present.
636 draw_find_shader_output(const struct draw_context
*draw
,
637 uint semantic_name
, uint semantic_index
)
639 const struct tgsi_shader_info
*info
= draw_get_shader_info(draw
);
642 for (i
= 0; i
< info
->num_outputs
; i
++) {
643 if (info
->output_semantic_name
[i
] == semantic_name
&&
644 info
->output_semantic_index
[i
] == semantic_index
)
648 /* Search the extra vertex attributes */
649 for (i
= 0; i
< draw
->extra_shader_outputs
.num
; i
++) {
650 if (draw
->extra_shader_outputs
.semantic_name
[i
] == semantic_name
&&
651 draw
->extra_shader_outputs
.semantic_index
[i
] == semantic_index
) {
652 return draw
->extra_shader_outputs
.slot
[i
];
661 * Return total number of the shader outputs. This function is similar to
662 * draw_current_shader_outputs() but this function also counts any extra
663 * vertex/geometry output attributes that may be filled in by some draw
664 * stages (such as AA point, AA line).
666 * If geometry shader is present, its output will be returned,
667 * if not vertex shader is used.
670 draw_num_shader_outputs(const struct draw_context
*draw
)
672 const struct tgsi_shader_info
*info
= draw_get_shader_info(draw
);
675 count
= info
->num_outputs
;
676 count
+= draw
->extra_shader_outputs
.num
;
683 * Return total number of the vertex shader outputs. This function
684 * also counts any extra vertex output attributes that may
685 * be filled in by some draw stages (such as AA point, AA line,
689 draw_total_vs_outputs(const struct draw_context
*draw
)
691 const struct tgsi_shader_info
*info
= &draw
->vs
.vertex_shader
->info
;
693 return info
->num_outputs
+ draw
->extra_shader_outputs
.num
;
697 * Return total number of the geometry shader outputs. This function
698 * also counts any extra geometry output attributes that may
699 * be filled in by some draw stages (such as AA point, AA line, front
703 draw_total_gs_outputs(const struct draw_context
*draw
)
705 const struct tgsi_shader_info
*info
;
707 if (!draw
->gs
.geometry_shader
)
710 info
= &draw
->gs
.geometry_shader
->info
;
712 return info
->num_outputs
+ draw
->extra_shader_outputs
.num
;
717 * Provide TGSI sampler objects for vertex/geometry shaders that use
718 * texture fetches. This state only needs to be set once per context.
719 * This might only be used by software drivers for the time being.
722 draw_texture_sampler(struct draw_context
*draw
,
724 struct tgsi_sampler
*sampler
)
726 if (shader
== PIPE_SHADER_VERTEX
) {
727 draw
->vs
.tgsi
.sampler
= sampler
;
729 debug_assert(shader
== PIPE_SHADER_GEOMETRY
);
730 draw
->gs
.tgsi
.sampler
= sampler
;
737 void draw_set_render( struct draw_context
*draw
,
738 struct vbuf_render
*render
)
740 draw
->render
= render
;
745 * Tell the draw module where vertex indexes/elements are located, and
746 * their size (in bytes).
748 * Note: the caller must apply the pipe_index_buffer::offset value to
749 * the address. The draw module doesn't do that.
752 draw_set_indexes(struct draw_context
*draw
,
753 const void *elements
, unsigned elem_size
,
754 unsigned elem_buffer_space
)
756 assert(elem_size
== 0 ||
760 draw
->pt
.user
.elts
= elements
;
761 draw
->pt
.user
.eltSizeIB
= elem_size
;
763 draw
->pt
.user
.eltMax
= elem_buffer_space
/ elem_size
;
765 draw
->pt
.user
.eltMax
= 0;
771 void draw_do_flush( struct draw_context
*draw
, unsigned flags
)
773 if (!draw
->suspend_flushing
)
775 assert(!draw
->flushing
); /* catch inadvertant recursion */
777 draw
->flushing
= TRUE
;
779 draw_pipeline_flush( draw
, flags
);
781 draw_pt_flush( draw
, flags
);
783 draw
->flushing
= FALSE
;
789 * Return the number of output attributes produced by the geometry
790 * shader, if present. If no geometry shader, return the number of
791 * outputs from the vertex shader.
792 * \sa draw_num_shader_outputs
795 draw_current_shader_outputs(const struct draw_context
*draw
)
797 if (draw
->gs
.geometry_shader
)
798 return draw
->gs
.num_gs_outputs
;
799 return draw
->vs
.num_vs_outputs
;
804 * Return the index of the shader output which will contain the
808 draw_current_shader_position_output(const struct draw_context
*draw
)
810 if (draw
->gs
.geometry_shader
)
811 return draw
->gs
.position_output
;
812 return draw
->vs
.position_output
;
817 * Return the index of the shader output which will contain the
821 draw_current_shader_viewport_index_output(const struct draw_context
*draw
)
823 if (draw
->gs
.geometry_shader
)
824 return draw
->gs
.geometry_shader
->viewport_index_output
;
825 return draw
->vs
.vertex_shader
->viewport_index_output
;
829 * Returns true if there's a geometry shader bound and the geometry
830 * shader writes out a viewport index.
833 draw_current_shader_uses_viewport_index(const struct draw_context
*draw
)
835 if (draw
->gs
.geometry_shader
)
836 return draw
->gs
.geometry_shader
->info
.writes_viewport_index
;
837 return draw
->vs
.vertex_shader
->info
.writes_viewport_index
;
842 * Return the index of the shader output which will contain the
843 * clip vertex position.
844 * Note we don't support clipvertex output in the gs. For clipping
845 * to work correctly hence we return ordinary position output instead.
848 draw_current_shader_clipvertex_output(const struct draw_context
*draw
)
850 if (draw
->gs
.geometry_shader
)
851 return draw
->gs
.position_output
;
852 return draw
->vs
.clipvertex_output
;
856 draw_current_shader_clipdistance_output(const struct draw_context
*draw
, int index
)
858 debug_assert(index
< PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT
);
859 if (draw
->gs
.geometry_shader
)
860 return draw
->gs
.geometry_shader
->clipdistance_output
[index
];
861 return draw
->vs
.clipdistance_output
[index
];
866 draw_current_shader_num_written_clipdistances(const struct draw_context
*draw
)
868 if (draw
->gs
.geometry_shader
)
869 return draw
->gs
.geometry_shader
->info
.num_written_clipdistance
;
870 return draw
->vs
.vertex_shader
->info
.num_written_clipdistance
;
875 draw_current_shader_culldistance_output(const struct draw_context
*draw
, int index
)
877 debug_assert(index
< PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT
);
878 if (draw
->gs
.geometry_shader
)
879 return draw
->gs
.geometry_shader
->culldistance_output
[index
];
880 return draw
->vs
.vertex_shader
->culldistance_output
[index
];
884 draw_current_shader_num_written_culldistances(const struct draw_context
*draw
)
886 if (draw
->gs
.geometry_shader
)
887 return draw
->gs
.geometry_shader
->info
.num_written_culldistance
;
888 return draw
->vs
.vertex_shader
->info
.num_written_culldistance
;
892 * Return a pointer/handle for a driver/CSO rasterizer object which
893 * disabled culling, stippling, unfilled tris, etc.
894 * This is used by some pipeline stages (such as wide_point, aa_line
895 * and aa_point) which convert points/lines into triangles. In those
896 * cases we don't want to accidentally cull the triangles.
898 * \param scissor should the rasterizer state enable scissoring?
899 * \param flatshade should the rasterizer state use flat shading?
900 * \return rasterizer CSO handle
903 draw_get_rasterizer_no_cull( struct draw_context
*draw
,
907 if (!draw
->rasterizer_no_cull
[scissor
][flatshade
]) {
909 struct pipe_context
*pipe
= draw
->pipe
;
910 struct pipe_rasterizer_state rast
;
912 memset(&rast
, 0, sizeof(rast
));
913 rast
.scissor
= scissor
;
914 rast
.flatshade
= flatshade
;
916 rast
.half_pixel_center
= draw
->rasterizer
->half_pixel_center
;
917 rast
.bottom_edge_rule
= draw
->rasterizer
->bottom_edge_rule
;
918 rast
.clip_halfz
= draw
->rasterizer
->clip_halfz
;
920 draw
->rasterizer_no_cull
[scissor
][flatshade
] =
921 pipe
->create_rasterizer_state(pipe
, &rast
);
923 return draw
->rasterizer_no_cull
[scissor
][flatshade
];
927 draw_set_mapped_so_targets(struct draw_context
*draw
,
929 struct draw_so_target
*targets
[PIPE_MAX_SO_BUFFERS
])
933 for (i
= 0; i
< num_targets
; i
++)
934 draw
->so
.targets
[i
] = targets
[i
];
935 for (i
= num_targets
; i
< PIPE_MAX_SO_BUFFERS
; i
++)
936 draw
->so
.targets
[i
] = NULL
;
938 draw
->so
.num_targets
= num_targets
;
942 draw_set_sampler_views(struct draw_context
*draw
,
943 unsigned shader_stage
,
944 struct pipe_sampler_view
**views
,
949 debug_assert(shader_stage
< PIPE_SHADER_TYPES
);
950 debug_assert(num
<= PIPE_MAX_SHADER_SAMPLER_VIEWS
);
952 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
954 for (i
= 0; i
< num
; ++i
)
955 draw
->sampler_views
[shader_stage
][i
] = views
[i
];
956 for (i
= num
; i
< PIPE_MAX_SHADER_SAMPLER_VIEWS
; ++i
)
957 draw
->sampler_views
[shader_stage
][i
] = NULL
;
959 draw
->num_sampler_views
[shader_stage
] = num
;
963 draw_set_samplers(struct draw_context
*draw
,
964 unsigned shader_stage
,
965 struct pipe_sampler_state
**samplers
,
970 debug_assert(shader_stage
< PIPE_SHADER_TYPES
);
971 debug_assert(num
<= PIPE_MAX_SAMPLERS
);
973 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
975 for (i
= 0; i
< num
; ++i
)
976 draw
->samplers
[shader_stage
][i
] = samplers
[i
];
977 for (i
= num
; i
< PIPE_MAX_SAMPLERS
; ++i
)
978 draw
->samplers
[shader_stage
][i
] = NULL
;
980 draw
->num_samplers
[shader_stage
] = num
;
984 draw_llvm_set_sampler_state(draw
, shader_stage
);
989 draw_set_mapped_texture(struct draw_context
*draw
,
990 unsigned shader_stage
,
992 uint32_t width
, uint32_t height
, uint32_t depth
,
993 uint32_t first_level
, uint32_t last_level
,
994 const void *base_ptr
,
995 uint32_t row_stride
[PIPE_MAX_TEXTURE_LEVELS
],
996 uint32_t img_stride
[PIPE_MAX_TEXTURE_LEVELS
],
997 uint32_t mip_offsets
[PIPE_MAX_TEXTURE_LEVELS
])
1001 draw_llvm_set_mapped_texture(draw
,
1004 width
, height
, depth
, first_level
,
1005 last_level
, base_ptr
,
1006 row_stride
, img_stride
, mip_offsets
);
1011 * XXX: Results for PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS because there are two
1012 * different ways of setting textures, and drivers typically only support one.
1015 draw_get_shader_param_no_llvm(unsigned shader
, enum pipe_shader_cap param
)
1018 case PIPE_SHADER_VERTEX
:
1019 case PIPE_SHADER_GEOMETRY
:
1020 return tgsi_exec_get_shader_param(param
);
1027 * XXX: Results for PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS because there are two
1028 * different ways of setting textures, and drivers typically only support one.
1029 * Drivers requesting a draw context explicitly without llvm must call
1030 * draw_get_shader_param_no_llvm instead.
1033 draw_get_shader_param(unsigned shader
, enum pipe_shader_cap param
)
1037 if (draw_get_option_use_llvm()) {
1039 case PIPE_SHADER_VERTEX
:
1040 case PIPE_SHADER_GEOMETRY
:
1041 return gallivm_get_shader_param(param
);
1048 return draw_get_shader_param_no_llvm(shader
, param
);
1052 * Enables or disables collection of statistics.
1054 * Draw module is capable of generating statistics for the vertex
1055 * processing pipeline. Collection of that data isn't free and so
1056 * it's disabled by default. The users of the module can enable
1057 * (or disable) this functionality through this function.
1058 * The actual data will be emitted through the VBUF interface,
1059 * the 'pipeline_statistics' callback to be exact.
1062 draw_collect_pipeline_statistics(struct draw_context
*draw
,
1065 draw
->collect_statistics
= enable
;
1069 * Computes clipper invocation statistics.
1071 * Figures out how many primitives would have been
1072 * sent to the clipper given the specified
1076 draw_stats_clipper_primitives(struct draw_context
*draw
,
1077 const struct draw_prim_info
*prim_info
)
1079 if (draw
->collect_statistics
) {
1081 for (i
= 0; i
< prim_info
->primitive_count
; i
++) {
1082 draw
->statistics
.c_invocations
+=
1083 u_decomposed_prims_for_vertices(prim_info
->prim
,
1084 prim_info
->primitive_lengths
[i
]);
1091 * Returns true if the draw module will inject the frontface
1092 * info into the outputs.
1094 * Given the specified primitive and rasterizer state
1095 * the function will figure out if the draw module
1096 * will inject the front-face information into shader
1097 * outputs. This is done to preserve the front-facing
1098 * info when decomposing primitives into wireframes.
1101 draw_will_inject_frontface(const struct draw_context
*draw
)
1103 unsigned reduced_prim
= u_reduced_prim(draw
->pt
.prim
);
1104 const struct pipe_rasterizer_state
*rast
= draw
->rasterizer
;
1106 if (reduced_prim
!= PIPE_PRIM_TRIANGLES
) {
1111 (rast
->fill_front
!= PIPE_POLYGON_MODE_FILL
||
1112 rast
->fill_back
!= PIPE_POLYGON_MODE_FILL
));