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_vertex_buffer_unreference(&draw
->pt
.vertex_buffer
[i
]);
212 /* Not so fast -- we're just borrowing this at the moment.
215 draw->render->destroy( draw->render );
218 draw_prim_assembler_destroy(draw
->ia
);
219 draw_pipeline_destroy( draw
);
220 draw_pt_destroy( draw
);
221 draw_vs_destroy( draw
);
222 draw_gs_destroy( draw
);
225 draw_llvm_destroy( draw
->llvm
);
233 void draw_flush( struct draw_context
*draw
)
235 draw_do_flush( draw
, DRAW_FLUSH_BACKEND
);
240 * Specify the depth stencil format for the draw pipeline. This function
241 * determines the Minimum Resolvable Depth factor for polygon offset.
242 * This factor potentially depends on the number of Z buffer bits,
243 * the rasterization algorithm and the arithmetic performed on Z
244 * values between vertex shading and rasterization.
246 void draw_set_zs_format(struct draw_context
*draw
, enum pipe_format format
)
248 const struct util_format_description
*desc
= util_format_description(format
);
250 draw
->floating_point_depth
=
251 (util_get_depth_format_type(desc
) == UTIL_FORMAT_TYPE_FLOAT
);
253 draw
->mrd
= util_get_depth_format_mrd(desc
);
258 draw_is_vs_window_space(struct draw_context
*draw
)
260 if (draw
->vs
.vertex_shader
) {
261 struct tgsi_shader_info
*info
= &draw
->vs
.vertex_shader
->info
;
263 return info
->properties
[TGSI_PROPERTY_VS_WINDOW_SPACE_POSITION
] != 0;
270 draw_update_clip_flags(struct draw_context
*draw
)
272 bool window_space
= draw_is_vs_window_space(draw
);
274 draw
->clip_xy
= !draw
->driver
.bypass_clip_xy
&& !window_space
;
275 draw
->guard_band_xy
= (!draw
->driver
.bypass_clip_xy
&&
276 draw
->driver
.guard_band_xy
);
277 draw
->clip_z
= (!draw
->driver
.bypass_clip_z
&&
278 draw
->rasterizer
&& draw
->rasterizer
->depth_clip_near
) &&
280 draw
->clip_user
= draw
->rasterizer
&&
281 draw
->rasterizer
->clip_plane_enable
!= 0 &&
283 draw
->guard_band_points_xy
= draw
->guard_band_xy
||
284 (draw
->driver
.bypass_clip_points
&&
286 draw
->rasterizer
->point_tri_clip
));
291 draw_update_viewport_flags(struct draw_context
*draw
)
293 bool window_space
= draw_is_vs_window_space(draw
);
295 draw
->bypass_viewport
= window_space
|| draw
->identity_viewport
;
300 * Register new primitive rasterization/rendering state.
301 * This causes the drawing pipeline to be rebuilt.
303 void draw_set_rasterizer_state( struct draw_context
*draw
,
304 const struct pipe_rasterizer_state
*raster
,
307 if (!draw
->suspend_flushing
) {
308 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
310 draw
->rasterizer
= raster
;
311 draw
->rast_handle
= rast_handle
;
312 draw_update_clip_flags(draw
);
316 /* With a little more work, llvmpipe will be able to turn this off and
317 * do its own x/y clipping.
319 * Some hardware can turn off clipping altogether - in particular any
320 * hardware with a TNL unit can do its own clipping, even if it is
321 * relying on the draw module for some other reason.
322 * Setting bypass_clip_points to achieve d3d-style point clipping (the driver
323 * will need to do the "vp scissoring") _requires_ the driver to implement
324 * wide points / point sprites itself (points will still be clipped if rasterizer
325 * point_tri_clip isn't set). Only relevant if bypass_clip_xy isn't set.
327 void draw_set_driver_clipping( struct draw_context
*draw
,
328 boolean bypass_clip_xy
,
329 boolean bypass_clip_z
,
330 boolean guard_band_xy
,
331 boolean bypass_clip_points
)
333 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
335 draw
->driver
.bypass_clip_xy
= bypass_clip_xy
;
336 draw
->driver
.bypass_clip_z
= bypass_clip_z
;
337 draw
->driver
.guard_band_xy
= guard_band_xy
;
338 draw
->driver
.bypass_clip_points
= bypass_clip_points
;
339 draw_update_clip_flags(draw
);
344 * Plug in the primitive rendering/rasterization stage (which is the last
345 * stage in the drawing pipeline).
346 * This is provided by the device driver.
348 void draw_set_rasterize_stage( struct draw_context
*draw
,
349 struct draw_stage
*stage
)
351 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
353 draw
->pipeline
.rasterize
= stage
;
358 * Set the draw module's clipping state.
360 void draw_set_clip_state( struct draw_context
*draw
,
361 const struct pipe_clip_state
*clip
)
363 draw_do_flush(draw
, DRAW_FLUSH_PARAMETER_CHANGE
);
365 memcpy(&draw
->plane
[6], clip
->ucp
, sizeof(clip
->ucp
));
370 * Set the draw module's viewport state.
372 void draw_set_viewport_states( struct draw_context
*draw
,
374 unsigned num_viewports
,
375 const struct pipe_viewport_state
*vps
)
377 const struct pipe_viewport_state
*viewport
= vps
;
378 draw_do_flush(draw
, DRAW_FLUSH_PARAMETER_CHANGE
);
380 debug_assert(start_slot
< PIPE_MAX_VIEWPORTS
);
381 debug_assert((start_slot
+ num_viewports
) <= PIPE_MAX_VIEWPORTS
);
383 memcpy(draw
->viewports
+ start_slot
, vps
,
384 sizeof(struct pipe_viewport_state
) * num_viewports
);
386 draw
->identity_viewport
= (num_viewports
== 1) &&
387 (viewport
->scale
[0] == 1.0f
&&
388 viewport
->scale
[1] == 1.0f
&&
389 viewport
->scale
[2] == 1.0f
&&
390 viewport
->translate
[0] == 0.0f
&&
391 viewport
->translate
[1] == 0.0f
&&
392 viewport
->translate
[2] == 0.0f
);
393 draw_update_viewport_flags(draw
);
399 draw_set_vertex_buffers(struct draw_context
*draw
,
400 unsigned start_slot
, unsigned count
,
401 const struct pipe_vertex_buffer
*buffers
)
403 assert(start_slot
+ count
<= PIPE_MAX_ATTRIBS
);
405 util_set_vertex_buffers_count(draw
->pt
.vertex_buffer
,
406 &draw
->pt
.nr_vertex_buffers
,
407 buffers
, start_slot
, count
);
412 draw_set_vertex_elements(struct draw_context
*draw
,
414 const struct pipe_vertex_element
*elements
)
416 assert(count
<= PIPE_MAX_ATTRIBS
);
418 /* We could improve this by only flushing the frontend and the fetch part
419 * of the middle. This would avoid recalculating the emit keys.*/
420 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
422 memcpy(draw
->pt
.vertex_element
, elements
, count
* sizeof(elements
[0]));
423 draw
->pt
.nr_vertex_elements
= count
;
428 * Tell drawing context where to find mapped vertex buffers.
431 draw_set_mapped_vertex_buffer(struct draw_context
*draw
,
432 unsigned attr
, const void *buffer
,
435 draw
->pt
.user
.vbuffer
[attr
].map
= buffer
;
436 draw
->pt
.user
.vbuffer
[attr
].size
= size
;
441 draw_set_mapped_constant_buffer(struct draw_context
*draw
,
442 enum pipe_shader_type shader_type
,
447 debug_assert(shader_type
== PIPE_SHADER_VERTEX
||
448 shader_type
== PIPE_SHADER_GEOMETRY
);
449 debug_assert(slot
< PIPE_MAX_CONSTANT_BUFFERS
);
451 draw_do_flush(draw
, DRAW_FLUSH_PARAMETER_CHANGE
);
453 switch (shader_type
) {
454 case PIPE_SHADER_VERTEX
:
455 draw
->pt
.user
.vs_constants
[slot
] = buffer
;
456 draw
->pt
.user
.vs_constants_size
[slot
] = size
;
458 case PIPE_SHADER_GEOMETRY
:
459 draw
->pt
.user
.gs_constants
[slot
] = buffer
;
460 draw
->pt
.user
.gs_constants_size
[slot
] = size
;
463 assert(0 && "invalid shader type in draw_set_mapped_constant_buffer");
469 * Tells the draw module to draw points with triangles if their size
470 * is greater than this threshold.
473 draw_wide_point_threshold(struct draw_context
*draw
, float threshold
)
475 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
476 draw
->pipeline
.wide_point_threshold
= threshold
;
481 * Should the draw module handle point->quad conversion for drawing sprites?
484 draw_wide_point_sprites(struct draw_context
*draw
, boolean draw_sprite
)
486 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
487 draw
->pipeline
.wide_point_sprites
= draw_sprite
;
492 * Tells the draw module to draw lines with triangles if their width
493 * is greater than this threshold.
496 draw_wide_line_threshold(struct draw_context
*draw
, float threshold
)
498 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
499 draw
->pipeline
.wide_line_threshold
= roundf(threshold
);
504 * Tells the draw module whether or not to implement line stipple.
507 draw_enable_line_stipple(struct draw_context
*draw
, boolean enable
)
509 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
510 draw
->pipeline
.line_stipple
= enable
;
515 * Tells draw module whether to convert points to quads for sprite mode.
518 draw_enable_point_sprites(struct draw_context
*draw
, boolean enable
)
520 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
521 draw
->pipeline
.point_sprite
= enable
;
526 draw_set_force_passthrough( struct draw_context
*draw
, boolean enable
)
528 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
529 draw
->force_passthrough
= enable
;
535 * Allocate an extra vertex/geometry shader vertex attribute, if it doesn't
538 * This is used by some of the optional draw module stages such
539 * as wide_point which may need to allocate additional generic/texcoord
543 draw_alloc_extra_vertex_attrib(struct draw_context
*draw
,
544 uint semantic_name
, uint semantic_index
)
550 slot
= draw_find_shader_output(draw
, semantic_name
, semantic_index
);
555 num_outputs
= draw_current_shader_outputs(draw
);
556 n
= draw
->extra_shader_outputs
.num
;
558 assert(n
< ARRAY_SIZE(draw
->extra_shader_outputs
.semantic_name
));
560 draw
->extra_shader_outputs
.semantic_name
[n
] = semantic_name
;
561 draw
->extra_shader_outputs
.semantic_index
[n
] = semantic_index
;
562 draw
->extra_shader_outputs
.slot
[n
] = num_outputs
+ n
;
563 draw
->extra_shader_outputs
.num
++;
565 return draw
->extra_shader_outputs
.slot
[n
];
570 * Remove all extra vertex attributes that were allocated with
571 * draw_alloc_extra_vertex_attrib().
574 draw_remove_extra_vertex_attribs(struct draw_context
*draw
)
576 draw
->extra_shader_outputs
.num
= 0;
581 * If a geometry shader is present, return its info, else the vertex shader's
584 struct tgsi_shader_info
*
585 draw_get_shader_info(const struct draw_context
*draw
)
588 if (draw
->gs
.geometry_shader
) {
589 return &draw
->gs
.geometry_shader
->info
;
591 return &draw
->vs
.vertex_shader
->info
;
596 * Prepare outputs slots from the draw module
598 * Certain parts of the draw module can emit additional
599 * outputs that can be quite useful to the backends, a good
600 * example of it is the process of decomposing primitives
601 * into wireframes (aka. lines) which normally would lose
602 * the face-side information, but using this method we can
603 * inject another shader output which passes the original
604 * face side information to the backend.
607 draw_prepare_shader_outputs(struct draw_context
*draw
)
609 draw_remove_extra_vertex_attribs(draw
);
610 draw_prim_assembler_prepare_outputs(draw
->ia
);
611 draw_unfilled_prepare_outputs(draw
, draw
->pipeline
.unfilled
);
612 if (draw
->pipeline
.aapoint
)
613 draw_aapoint_prepare_outputs(draw
, draw
->pipeline
.aapoint
);
614 if (draw
->pipeline
.aaline
)
615 draw_aaline_prepare_outputs(draw
, draw
->pipeline
.aaline
);
619 * Ask the draw module for the location/slot of the given vertex attribute in
620 * a post-transformed vertex.
622 * With this function, drivers that use the draw module should have no reason
623 * to track the current vertex/geometry shader.
625 * Note that the draw module may sometimes generate vertices with extra
626 * attributes (such as texcoords for AA lines). The driver can call this
627 * function to find those attributes.
629 * -1 is returned if the attribute is not found since this is
630 * an undefined situation. Note, that zero is valid and can
631 * be used by any of the attributes, because position is not
632 * required to be attribute 0 or even at all present.
635 draw_find_shader_output(const struct draw_context
*draw
,
636 uint semantic_name
, uint semantic_index
)
638 const struct tgsi_shader_info
*info
= draw_get_shader_info(draw
);
641 for (i
= 0; i
< info
->num_outputs
; i
++) {
642 if (info
->output_semantic_name
[i
] == semantic_name
&&
643 info
->output_semantic_index
[i
] == semantic_index
)
647 /* Search the extra vertex attributes */
648 for (i
= 0; i
< draw
->extra_shader_outputs
.num
; i
++) {
649 if (draw
->extra_shader_outputs
.semantic_name
[i
] == semantic_name
&&
650 draw
->extra_shader_outputs
.semantic_index
[i
] == semantic_index
) {
651 return draw
->extra_shader_outputs
.slot
[i
];
660 * Return total number of the shader outputs. This function is similar to
661 * draw_current_shader_outputs() but this function also counts any extra
662 * vertex/geometry output attributes that may be filled in by some draw
663 * stages (such as AA point, AA line).
665 * If geometry shader is present, its output will be returned,
666 * if not vertex shader is used.
669 draw_num_shader_outputs(const struct draw_context
*draw
)
671 const struct tgsi_shader_info
*info
= draw_get_shader_info(draw
);
674 count
= info
->num_outputs
;
675 count
+= draw
->extra_shader_outputs
.num
;
682 * Return total number of the vertex shader outputs. This function
683 * also counts any extra vertex output attributes that may
684 * be filled in by some draw stages (such as AA point, AA line,
688 draw_total_vs_outputs(const struct draw_context
*draw
)
690 const struct tgsi_shader_info
*info
= &draw
->vs
.vertex_shader
->info
;
692 return info
->num_outputs
+ draw
->extra_shader_outputs
.num
;
696 * Return total number of the geometry shader outputs. This function
697 * also counts any extra geometry output attributes that may
698 * be filled in by some draw stages (such as AA point, AA line, front
702 draw_total_gs_outputs(const struct draw_context
*draw
)
704 const struct tgsi_shader_info
*info
;
706 if (!draw
->gs
.geometry_shader
)
709 info
= &draw
->gs
.geometry_shader
->info
;
711 return info
->num_outputs
+ draw
->extra_shader_outputs
.num
;
716 * Provide TGSI sampler objects for vertex/geometry shaders that use
717 * texture fetches. This state only needs to be set once per context.
718 * This might only be used by software drivers for the time being.
721 draw_texture_sampler(struct draw_context
*draw
,
722 enum pipe_shader_type shader
,
723 struct tgsi_sampler
*sampler
)
725 if (shader
== PIPE_SHADER_VERTEX
) {
726 draw
->vs
.tgsi
.sampler
= sampler
;
728 debug_assert(shader
== PIPE_SHADER_GEOMETRY
);
729 draw
->gs
.tgsi
.sampler
= sampler
;
734 * Provide TGSI image objects for vertex/geometry shaders that use
735 * texture fetches. This state only needs to be set once per context.
736 * This might only be used by software drivers for the time being.
739 draw_image(struct draw_context
*draw
,
740 enum pipe_shader_type shader
,
741 struct tgsi_image
*image
)
743 if (shader
== PIPE_SHADER_VERTEX
) {
744 draw
->vs
.tgsi
.image
= image
;
746 debug_assert(shader
== PIPE_SHADER_GEOMETRY
);
747 draw
->gs
.tgsi
.image
= image
;
752 * Provide TGSI buffer objects for vertex/geometry shaders that use
753 * load/store/atomic ops. This state only needs to be set once per context.
754 * This might only be used by software drivers for the time being.
757 draw_buffer(struct draw_context
*draw
,
758 enum pipe_shader_type shader
,
759 struct tgsi_buffer
*buffer
)
761 if (shader
== PIPE_SHADER_VERTEX
) {
762 draw
->vs
.tgsi
.buffer
= buffer
;
764 debug_assert(shader
== PIPE_SHADER_GEOMETRY
);
765 draw
->gs
.tgsi
.buffer
= buffer
;
770 void draw_set_render( struct draw_context
*draw
,
771 struct vbuf_render
*render
)
773 draw
->render
= render
;
778 * Tell the draw module where vertex indexes/elements are located, and
779 * their size (in bytes).
782 draw_set_indexes(struct draw_context
*draw
,
783 const void *elements
, unsigned elem_size
,
784 unsigned elem_buffer_space
)
786 assert(elem_size
== 0 ||
790 draw
->pt
.user
.elts
= elements
;
791 draw
->pt
.user
.eltSizeIB
= elem_size
;
793 draw
->pt
.user
.eltMax
= elem_buffer_space
/ elem_size
;
795 draw
->pt
.user
.eltMax
= 0;
801 void draw_do_flush( struct draw_context
*draw
, unsigned flags
)
803 if (!draw
->suspend_flushing
)
805 assert(!draw
->flushing
); /* catch inadvertant recursion */
807 draw
->flushing
= TRUE
;
809 draw_pipeline_flush( draw
, flags
);
811 draw_pt_flush( draw
, flags
);
813 draw
->flushing
= FALSE
;
819 * Return the number of output attributes produced by the geometry
820 * shader, if present. If no geometry shader, return the number of
821 * outputs from the vertex shader.
822 * \sa draw_num_shader_outputs
825 draw_current_shader_outputs(const struct draw_context
*draw
)
827 if (draw
->gs
.geometry_shader
)
828 return draw
->gs
.num_gs_outputs
;
829 return draw
->vs
.num_vs_outputs
;
834 * Return the index of the shader output which will contain the
838 draw_current_shader_position_output(const struct draw_context
*draw
)
840 if (draw
->gs
.geometry_shader
)
841 return draw
->gs
.position_output
;
842 return draw
->vs
.position_output
;
847 * Return the index of the shader output which will contain the
851 draw_current_shader_viewport_index_output(const struct draw_context
*draw
)
853 if (draw
->gs
.geometry_shader
)
854 return draw
->gs
.geometry_shader
->viewport_index_output
;
855 return draw
->vs
.vertex_shader
->viewport_index_output
;
859 * Returns true if there's a geometry shader bound and the geometry
860 * shader writes out a viewport index.
863 draw_current_shader_uses_viewport_index(const struct draw_context
*draw
)
865 if (draw
->gs
.geometry_shader
)
866 return draw
->gs
.geometry_shader
->info
.writes_viewport_index
;
867 return draw
->vs
.vertex_shader
->info
.writes_viewport_index
;
872 * Return the index of the shader output which will contain the
873 * clip vertex position.
874 * Note we don't support clipvertex output in the gs. For clipping
875 * to work correctly hence we return ordinary position output instead.
878 draw_current_shader_clipvertex_output(const struct draw_context
*draw
)
880 if (draw
->gs
.geometry_shader
)
881 return draw
->gs
.position_output
;
882 return draw
->vs
.clipvertex_output
;
886 draw_current_shader_ccdistance_output(const struct draw_context
*draw
, int index
)
888 debug_assert(index
< PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT
);
889 if (draw
->gs
.geometry_shader
)
890 return draw
->gs
.geometry_shader
->ccdistance_output
[index
];
891 return draw
->vs
.ccdistance_output
[index
];
896 draw_current_shader_num_written_clipdistances(const struct draw_context
*draw
)
898 if (draw
->gs
.geometry_shader
)
899 return draw
->gs
.geometry_shader
->info
.num_written_clipdistance
;
900 return draw
->vs
.vertex_shader
->info
.num_written_clipdistance
;
904 draw_current_shader_num_written_culldistances(const struct draw_context
*draw
)
906 if (draw
->gs
.geometry_shader
)
907 return draw
->gs
.geometry_shader
->info
.num_written_culldistance
;
908 return draw
->vs
.vertex_shader
->info
.num_written_culldistance
;
912 * Return a pointer/handle for a driver/CSO rasterizer object which
913 * disabled culling, stippling, unfilled tris, etc.
914 * This is used by some pipeline stages (such as wide_point, aa_line
915 * and aa_point) which convert points/lines into triangles. In those
916 * cases we don't want to accidentally cull the triangles.
918 * \param scissor should the rasterizer state enable scissoring?
919 * \param flatshade should the rasterizer state use flat shading?
920 * \return rasterizer CSO handle
923 draw_get_rasterizer_no_cull( struct draw_context
*draw
,
927 if (!draw
->rasterizer_no_cull
[scissor
][flatshade
]) {
929 struct pipe_context
*pipe
= draw
->pipe
;
930 struct pipe_rasterizer_state rast
;
932 memset(&rast
, 0, sizeof(rast
));
933 rast
.scissor
= scissor
;
934 rast
.flatshade
= flatshade
;
936 rast
.half_pixel_center
= draw
->rasterizer
->half_pixel_center
;
937 rast
.bottom_edge_rule
= draw
->rasterizer
->bottom_edge_rule
;
938 rast
.clip_halfz
= draw
->rasterizer
->clip_halfz
;
940 draw
->rasterizer_no_cull
[scissor
][flatshade
] =
941 pipe
->create_rasterizer_state(pipe
, &rast
);
943 return draw
->rasterizer_no_cull
[scissor
][flatshade
];
947 draw_set_mapped_so_targets(struct draw_context
*draw
,
949 struct draw_so_target
*targets
[PIPE_MAX_SO_BUFFERS
])
953 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
955 for (i
= 0; i
< num_targets
; i
++)
956 draw
->so
.targets
[i
] = targets
[i
];
957 for (i
= num_targets
; i
< PIPE_MAX_SO_BUFFERS
; i
++)
958 draw
->so
.targets
[i
] = NULL
;
960 draw
->so
.num_targets
= num_targets
;
964 draw_set_sampler_views(struct draw_context
*draw
,
965 enum pipe_shader_type shader_stage
,
966 struct pipe_sampler_view
**views
,
971 debug_assert(shader_stage
< PIPE_SHADER_TYPES
);
972 debug_assert(num
<= PIPE_MAX_SHADER_SAMPLER_VIEWS
);
974 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
976 for (i
= 0; i
< num
; ++i
)
977 draw
->sampler_views
[shader_stage
][i
] = views
[i
];
978 for (i
= num
; i
< draw
->num_sampler_views
[shader_stage
]; ++i
)
979 draw
->sampler_views
[shader_stage
][i
] = NULL
;
981 draw
->num_sampler_views
[shader_stage
] = num
;
985 draw_set_samplers(struct draw_context
*draw
,
986 enum pipe_shader_type shader_stage
,
987 struct pipe_sampler_state
**samplers
,
992 debug_assert(shader_stage
< PIPE_SHADER_TYPES
);
993 debug_assert(num
<= PIPE_MAX_SAMPLERS
);
995 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
997 for (i
= 0; i
< num
; ++i
)
998 draw
->samplers
[shader_stage
][i
] = samplers
[i
];
999 for (i
= num
; i
< PIPE_MAX_SAMPLERS
; ++i
)
1000 draw
->samplers
[shader_stage
][i
] = NULL
;
1002 draw
->num_samplers
[shader_stage
] = num
;
1006 draw_llvm_set_sampler_state(draw
, shader_stage
);
1011 draw_set_mapped_texture(struct draw_context
*draw
,
1012 enum pipe_shader_type shader_stage
,
1014 uint32_t width
, uint32_t height
, uint32_t depth
,
1015 uint32_t first_level
, uint32_t last_level
,
1016 const void *base_ptr
,
1017 uint32_t row_stride
[PIPE_MAX_TEXTURE_LEVELS
],
1018 uint32_t img_stride
[PIPE_MAX_TEXTURE_LEVELS
],
1019 uint32_t mip_offsets
[PIPE_MAX_TEXTURE_LEVELS
])
1023 draw_llvm_set_mapped_texture(draw
,
1026 width
, height
, depth
, first_level
,
1027 last_level
, base_ptr
,
1028 row_stride
, img_stride
, mip_offsets
);
1033 * XXX: Results for PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS because there are two
1034 * different ways of setting textures, and drivers typically only support one.
1037 draw_get_shader_param_no_llvm(enum pipe_shader_type shader
,
1038 enum pipe_shader_cap param
)
1041 case PIPE_SHADER_VERTEX
:
1042 case PIPE_SHADER_GEOMETRY
:
1043 return tgsi_exec_get_shader_param(param
);
1050 * XXX: Results for PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS because there are two
1051 * different ways of setting textures, and drivers typically only support one.
1052 * Drivers requesting a draw context explicitly without llvm must call
1053 * draw_get_shader_param_no_llvm instead.
1056 draw_get_shader_param(enum pipe_shader_type shader
, enum pipe_shader_cap param
)
1060 if (draw_get_option_use_llvm()) {
1062 case PIPE_SHADER_VERTEX
:
1063 case PIPE_SHADER_GEOMETRY
:
1064 return gallivm_get_shader_param(param
);
1071 return draw_get_shader_param_no_llvm(shader
, param
);
1075 * Enables or disables collection of statistics.
1077 * Draw module is capable of generating statistics for the vertex
1078 * processing pipeline. Collection of that data isn't free and so
1079 * it's disabled by default. The users of the module can enable
1080 * (or disable) this functionality through this function.
1081 * The actual data will be emitted through the VBUF interface,
1082 * the 'pipeline_statistics' callback to be exact.
1085 draw_collect_pipeline_statistics(struct draw_context
*draw
,
1088 draw
->collect_statistics
= enable
;
1092 * Computes clipper invocation statistics.
1094 * Figures out how many primitives would have been
1095 * sent to the clipper given the specified
1099 draw_stats_clipper_primitives(struct draw_context
*draw
,
1100 const struct draw_prim_info
*prim_info
)
1102 if (draw
->collect_statistics
) {
1104 for (i
= 0; i
< prim_info
->primitive_count
; i
++) {
1105 draw
->statistics
.c_invocations
+=
1106 u_decomposed_prims_for_vertices(prim_info
->prim
,
1107 prim_info
->primitive_lengths
[i
]);
1114 * Returns true if the draw module will inject the frontface
1115 * info into the outputs.
1117 * Given the specified primitive and rasterizer state
1118 * the function will figure out if the draw module
1119 * will inject the front-face information into shader
1120 * outputs. This is done to preserve the front-facing
1121 * info when decomposing primitives into wireframes.
1124 draw_will_inject_frontface(const struct draw_context
*draw
)
1126 unsigned reduced_prim
= u_reduced_prim(draw
->pt
.prim
);
1127 const struct pipe_rasterizer_state
*rast
= draw
->rasterizer
;
1129 if (reduced_prim
!= PIPE_PRIM_TRIANGLES
) {
1134 (rast
->fill_front
!= PIPE_POLYGON_MODE_FILL
||
1135 rast
->fill_back
!= PIPE_POLYGON_MODE_FILL
));