1 /**************************************************************************
3 * Copyright 2008 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 **************************************************************************/
29 * Polygon stipple stage: implement polygon stipple with texture map and
30 * fragment program. The fragment program samples the texture using the
31 * fragment window coordinate register and does a fragment kill for the
32 * stipple-failing fragments.
38 #include "pipe/p_context.h"
39 #include "pipe/p_defines.h"
40 #include "pipe/p_shader_tokens.h"
41 #include "util/u_inlines.h"
43 #include "util/u_format.h"
44 #include "util/u_math.h"
45 #include "util/u_memory.h"
46 #include "util/u_sampler.h"
48 #include "tgsi/tgsi_transform.h"
49 #include "tgsi/tgsi_dump.h"
51 #include "draw_context.h"
52 #include "draw_pipe.h"
55 /** Approx number of new tokens for instructions in pstip_transform_inst() */
56 #define NUM_NEW_TOKENS 50
60 * Subclass of pipe_shader_state to carry extra fragment shader info.
62 struct pstip_fragment_shader
64 struct pipe_shader_state state
;
72 * Subclass of draw_stage
76 struct draw_stage stage
;
79 struct pipe_resource
*texture
;
80 struct pipe_sampler_view
*sampler_view
;
82 uint num_sampler_views
;
85 * Currently bound state
87 struct pstip_fragment_shader
*fs
;
89 void *samplers
[PIPE_MAX_SAMPLERS
];
90 struct pipe_sampler_view
*sampler_views
[PIPE_MAX_SHADER_SAMPLER_VIEWS
];
91 const struct pipe_poly_stipple
*stipple
;
95 * Driver interface/override functions
97 void * (*driver_create_fs_state
)(struct pipe_context
*,
98 const struct pipe_shader_state
*);
99 void (*driver_bind_fs_state
)(struct pipe_context
*, void *);
100 void (*driver_delete_fs_state
)(struct pipe_context
*, void *);
102 void (*driver_bind_sampler_states
)(struct pipe_context
*, unsigned,
103 unsigned, unsigned, void **);
105 void (*driver_set_sampler_views
)(struct pipe_context
*,
106 unsigned shader
, unsigned start
,
108 struct pipe_sampler_view
**);
110 void (*driver_set_polygon_stipple
)(struct pipe_context
*,
111 const struct pipe_poly_stipple
*);
113 struct pipe_context
*pipe
;
119 * Subclass of tgsi_transform_context, used for transforming the
120 * user's fragment shader to add the extra texture sample and fragment kill
123 struct pstip_transform_context
{
124 struct tgsi_transform_context base
;
125 uint tempsUsed
; /**< bitmask */
128 uint samplersUsed
; /**< bitfield of samplers used */
129 int freeSampler
; /** an available sampler for the pstipple */
130 int texTemp
; /**< temp registers */
132 boolean firstInstruction
;
137 * TGSI declaration transform callback.
138 * Look for a free sampler, a free input attrib, and two free temp regs.
141 pstip_transform_decl(struct tgsi_transform_context
*ctx
,
142 struct tgsi_full_declaration
*decl
)
144 struct pstip_transform_context
*pctx
= (struct pstip_transform_context
*) ctx
;
146 if (decl
->Declaration
.File
== TGSI_FILE_SAMPLER
) {
148 for (i
= decl
->Range
.First
;
149 i
<= decl
->Range
.Last
; i
++) {
150 pctx
->samplersUsed
|= 1 << i
;
153 else if (decl
->Declaration
.File
== TGSI_FILE_INPUT
) {
154 pctx
->maxInput
= MAX2(pctx
->maxInput
, (int) decl
->Range
.Last
);
155 if (decl
->Semantic
.Name
== TGSI_SEMANTIC_POSITION
)
156 pctx
->wincoordInput
= (int) decl
->Range
.First
;
158 else if (decl
->Declaration
.File
== TGSI_FILE_TEMPORARY
) {
160 for (i
= decl
->Range
.First
;
161 i
<= decl
->Range
.Last
; i
++) {
162 pctx
->tempsUsed
|= (1 << i
);
166 ctx
->emit_declaration(ctx
, decl
);
171 * TGSI immediate declaration transform callback.
172 * We're just counting the number of immediates here.
175 pstip_transform_immed(struct tgsi_transform_context
*ctx
,
176 struct tgsi_full_immediate
*immed
)
178 struct pstip_transform_context
*pctx
= (struct pstip_transform_context
*) ctx
;
179 ctx
->emit_immediate(ctx
, immed
); /* emit to output shader */
185 * Find the lowest zero bit in the given word, or -1 if bitfield is all ones.
188 free_bit(uint bitfield
)
190 return ffs(~bitfield
) - 1;
195 * TGSI instruction transform callback.
196 * Replace writes to result.color w/ a temp reg.
197 * Upon END instruction, insert texture sampling code for antialiasing.
200 pstip_transform_inst(struct tgsi_transform_context
*ctx
,
201 struct tgsi_full_instruction
*inst
)
203 struct pstip_transform_context
*pctx
= (struct pstip_transform_context
*) ctx
;
205 if (pctx
->firstInstruction
) {
206 /* emit our new declarations before the first instruction */
208 struct tgsi_full_declaration decl
;
209 struct tgsi_full_instruction newInst
;
213 /* find free sampler */
214 pctx
->freeSampler
= free_bit(pctx
->samplersUsed
);
215 if (pctx
->freeSampler
>= PIPE_MAX_SAMPLERS
)
216 pctx
->freeSampler
= PIPE_MAX_SAMPLERS
- 1;
218 if (pctx
->wincoordInput
< 0)
219 wincoordInput
= pctx
->maxInput
+ 1;
221 wincoordInput
= pctx
->wincoordInput
;
223 /* find one free temp reg */
224 for (i
= 0; i
< 32; i
++) {
225 if ((pctx
->tempsUsed
& (1 << i
)) == 0) {
226 /* found a free temp */
227 if (pctx
->texTemp
< 0)
233 assert(pctx
->texTemp
>= 0);
235 if (pctx
->wincoordInput
< 0) {
236 /* declare new position input reg */
237 decl
= tgsi_default_full_declaration();
238 decl
.Declaration
.File
= TGSI_FILE_INPUT
;
239 decl
.Declaration
.Interpolate
= 1;
240 decl
.Declaration
.Semantic
= 1;
241 decl
.Semantic
.Name
= TGSI_SEMANTIC_POSITION
;
242 decl
.Semantic
.Index
= 0;
244 decl
.Range
.Last
= wincoordInput
;
245 decl
.Interp
.Interpolate
= TGSI_INTERPOLATE_LINEAR
; /* XXX? */
246 ctx
->emit_declaration(ctx
, &decl
);
249 /* declare new sampler */
250 decl
= tgsi_default_full_declaration();
251 decl
.Declaration
.File
= TGSI_FILE_SAMPLER
;
253 decl
.Range
.Last
= pctx
->freeSampler
;
254 ctx
->emit_declaration(ctx
, &decl
);
256 /* declare new temp regs */
257 decl
= tgsi_default_full_declaration();
258 decl
.Declaration
.File
= TGSI_FILE_TEMPORARY
;
260 decl
.Range
.Last
= pctx
->texTemp
;
261 ctx
->emit_declaration(ctx
, &decl
);
263 /* emit immediate = {1/32, 1/32, 1, 1}
264 * The index/position of this immediate will be pctx->numImmed
267 static const float value
[4] = { 1.0/32, 1.0/32, 1.0, 1.0 };
268 struct tgsi_full_immediate immed
;
270 immed
= tgsi_default_full_immediate();
271 immed
.Immediate
.NrTokens
= 1 + size
; /* one for the token itself */
272 immed
.u
[0].Float
= value
[0];
273 immed
.u
[1].Float
= value
[1];
274 immed
.u
[2].Float
= value
[2];
275 immed
.u
[3].Float
= value
[3];
276 ctx
->emit_immediate(ctx
, &immed
);
279 pctx
->firstInstruction
= FALSE
;
283 * Insert new MUL/TEX/KILL_IF instructions at start of program
284 * Take gl_FragCoord, divide by 32 (stipple size), sample the
285 * texture and kill fragment if needed.
287 * We'd like to use non-normalized texcoords to index into a RECT
288 * texture, but we can only use GL_REPEAT wrap mode with normalized
292 /* MUL texTemp, INPUT[wincoord], 1/32; */
293 newInst
= tgsi_default_full_instruction();
294 newInst
.Instruction
.Opcode
= TGSI_OPCODE_MUL
;
295 newInst
.Instruction
.NumDstRegs
= 1;
296 newInst
.Dst
[0].Register
.File
= TGSI_FILE_TEMPORARY
;
297 newInst
.Dst
[0].Register
.Index
= pctx
->texTemp
;
298 newInst
.Instruction
.NumSrcRegs
= 2;
299 newInst
.Src
[0].Register
.File
= TGSI_FILE_INPUT
;
300 newInst
.Src
[0].Register
.Index
= wincoordInput
;
301 newInst
.Src
[1].Register
.File
= TGSI_FILE_IMMEDIATE
;
302 newInst
.Src
[1].Register
.Index
= pctx
->numImmed
;
303 ctx
->emit_instruction(ctx
, &newInst
);
305 /* TEX texTemp, texTemp, sampler; */
306 newInst
= tgsi_default_full_instruction();
307 newInst
.Instruction
.Opcode
= TGSI_OPCODE_TEX
;
308 newInst
.Instruction
.NumDstRegs
= 1;
309 newInst
.Dst
[0].Register
.File
= TGSI_FILE_TEMPORARY
;
310 newInst
.Dst
[0].Register
.Index
= pctx
->texTemp
;
311 newInst
.Instruction
.NumSrcRegs
= 2;
312 newInst
.Instruction
.Texture
= TRUE
;
313 newInst
.Texture
.Texture
= TGSI_TEXTURE_2D
;
314 newInst
.Src
[0].Register
.File
= TGSI_FILE_TEMPORARY
;
315 newInst
.Src
[0].Register
.Index
= pctx
->texTemp
;
316 newInst
.Src
[1].Register
.File
= TGSI_FILE_SAMPLER
;
317 newInst
.Src
[1].Register
.Index
= pctx
->freeSampler
;
318 ctx
->emit_instruction(ctx
, &newInst
);
320 /* KILL_IF -texTemp; # if -texTemp < 0, KILL fragment */
321 newInst
= tgsi_default_full_instruction();
322 newInst
.Instruction
.Opcode
= TGSI_OPCODE_KILL_IF
;
323 newInst
.Instruction
.NumDstRegs
= 0;
324 newInst
.Instruction
.NumSrcRegs
= 1;
325 newInst
.Src
[0].Register
.File
= TGSI_FILE_TEMPORARY
;
326 newInst
.Src
[0].Register
.Index
= pctx
->texTemp
;
327 newInst
.Src
[0].Register
.Negate
= 1;
328 ctx
->emit_instruction(ctx
, &newInst
);
331 /* emit this instruction */
332 ctx
->emit_instruction(ctx
, inst
);
337 * Generate the frag shader we'll use for doing polygon stipple.
338 * This will be the user's shader prefixed with a TEX and KIL instruction.
341 generate_pstip_fs(struct pstip_stage
*pstip
)
343 const struct pipe_shader_state
*orig_fs
= &pstip
->fs
->state
;
344 /*struct draw_context *draw = pstip->stage.draw;*/
345 struct pipe_shader_state pstip_fs
;
346 struct pstip_transform_context transform
;
347 const uint newLen
= tgsi_num_tokens(orig_fs
->tokens
) + NUM_NEW_TOKENS
;
349 pstip_fs
= *orig_fs
; /* copy to init */
350 pstip_fs
.tokens
= tgsi_alloc_tokens(newLen
);
351 if (pstip_fs
.tokens
== NULL
)
354 memset(&transform
, 0, sizeof(transform
));
355 transform
.wincoordInput
= -1;
356 transform
.maxInput
= -1;
357 transform
.texTemp
= -1;
358 transform
.firstInstruction
= TRUE
;
359 transform
.base
.transform_instruction
= pstip_transform_inst
;
360 transform
.base
.transform_declaration
= pstip_transform_decl
;
361 transform
.base
.transform_immediate
= pstip_transform_immed
;
363 tgsi_transform_shader(orig_fs
->tokens
,
364 (struct tgsi_token
*) pstip_fs
.tokens
,
365 newLen
, &transform
.base
);
368 tgsi_dump(orig_fs
->tokens
, 0);
369 tgsi_dump(pstip_fs
.tokens
, 0);
374 pstip
->fs
->sampler_unit
= transform
.freeSampler
;
375 assert(pstip
->fs
->sampler_unit
< PIPE_MAX_SAMPLERS
);
377 pstip
->fs
->pstip_fs
= pstip
->driver_create_fs_state(pstip
->pipe
, &pstip_fs
);
379 FREE((void *)pstip_fs
.tokens
);
381 if (!pstip
->fs
->pstip_fs
)
389 * Load texture image with current stipple pattern.
392 pstip_update_texture(struct pstip_stage
*pstip
)
394 static const uint bit31
= 1 << 31;
395 struct pipe_context
*pipe
= pstip
->pipe
;
396 struct pipe_transfer
*transfer
;
397 const uint
*stipple
= pstip
->state
.stipple
->stipple
;
401 data
= pipe_transfer_map(pipe
, pstip
->texture
, 0, 0,
402 PIPE_TRANSFER_WRITE
, 0, 0, 32, 32, &transfer
);
405 * Load alpha texture.
406 * Note: 0 means keep the fragment, 255 means kill it.
407 * We'll negate the texel value and use KILL_IF which kills if value
410 for (i
= 0; i
< 32; i
++) {
411 for (j
= 0; j
< 32; j
++) {
412 if (stipple
[i
] & (bit31
>> j
)) {
414 data
[i
* transfer
->stride
+ j
] = 0;
418 data
[i
* transfer
->stride
+ j
] = 255;
424 pipe_transfer_unmap(pipe
, transfer
);
429 * Create the texture map we'll use for stippling.
432 pstip_create_texture(struct pstip_stage
*pstip
)
434 struct pipe_context
*pipe
= pstip
->pipe
;
435 struct pipe_screen
*screen
= pipe
->screen
;
436 struct pipe_resource texTemp
;
437 struct pipe_sampler_view viewTempl
;
439 memset(&texTemp
, 0, sizeof(texTemp
));
440 texTemp
.target
= PIPE_TEXTURE_2D
;
441 texTemp
.format
= PIPE_FORMAT_A8_UNORM
; /* XXX verify supported by driver! */
442 texTemp
.last_level
= 0;
444 texTemp
.height0
= 32;
446 texTemp
.array_size
= 1;
447 texTemp
.bind
= PIPE_BIND_SAMPLER_VIEW
;
449 pstip
->texture
= screen
->resource_create(screen
, &texTemp
);
450 if (pstip
->texture
== NULL
)
453 u_sampler_view_default_template(&viewTempl
,
455 pstip
->texture
->format
);
456 pstip
->sampler_view
= pipe
->create_sampler_view(pipe
,
459 if (!pstip
->sampler_view
) {
468 * Create the sampler CSO that'll be used for stippling.
471 pstip_create_sampler(struct pstip_stage
*pstip
)
473 struct pipe_sampler_state sampler
;
474 struct pipe_context
*pipe
= pstip
->pipe
;
476 memset(&sampler
, 0, sizeof(sampler
));
477 sampler
.wrap_s
= PIPE_TEX_WRAP_REPEAT
;
478 sampler
.wrap_t
= PIPE_TEX_WRAP_REPEAT
;
479 sampler
.wrap_r
= PIPE_TEX_WRAP_REPEAT
;
480 sampler
.min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
481 sampler
.min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
482 sampler
.mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
483 sampler
.normalized_coords
= 1;
484 sampler
.min_lod
= 0.0f
;
485 sampler
.max_lod
= 0.0f
;
487 pstip
->sampler_cso
= pipe
->create_sampler_state(pipe
, &sampler
);
488 if (pstip
->sampler_cso
== NULL
)
496 * When we're about to draw our first stipple polygon in a batch, this function
497 * is called to tell the driver to bind our modified fragment shader.
500 bind_pstip_fragment_shader(struct pstip_stage
*pstip
)
502 struct draw_context
*draw
= pstip
->stage
.draw
;
503 if (!pstip
->fs
->pstip_fs
&&
504 !generate_pstip_fs(pstip
))
507 draw
->suspend_flushing
= TRUE
;
508 pstip
->driver_bind_fs_state(pstip
->pipe
, pstip
->fs
->pstip_fs
);
509 draw
->suspend_flushing
= FALSE
;
514 static INLINE
struct pstip_stage
*
515 pstip_stage( struct draw_stage
*stage
)
517 return (struct pstip_stage
*) stage
;
522 pstip_first_tri(struct draw_stage
*stage
, struct prim_header
*header
)
524 struct pstip_stage
*pstip
= pstip_stage(stage
);
525 struct pipe_context
*pipe
= pstip
->pipe
;
526 struct draw_context
*draw
= stage
->draw
;
529 assert(stage
->draw
->rasterizer
->poly_stipple_enable
);
531 /* bind our fragprog */
532 if (!bind_pstip_fragment_shader(pstip
)) {
533 stage
->tri
= draw_pipe_passthrough_tri
;
534 stage
->tri(stage
, header
);
539 /* how many samplers? */
540 /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */
541 num_samplers
= MAX2(pstip
->num_sampler_views
, pstip
->num_samplers
);
542 num_samplers
= MAX2(num_samplers
, pstip
->fs
->sampler_unit
+ 1);
544 /* plug in our sampler, texture */
545 pstip
->state
.samplers
[pstip
->fs
->sampler_unit
] = pstip
->sampler_cso
;
546 pipe_sampler_view_reference(&pstip
->state
.sampler_views
[pstip
->fs
->sampler_unit
],
547 pstip
->sampler_view
);
549 assert(num_samplers
<= PIPE_MAX_SAMPLERS
);
551 draw
->suspend_flushing
= TRUE
;
553 pstip
->driver_bind_sampler_states(pipe
, PIPE_SHADER_FRAGMENT
, 0,
554 num_samplers
, pstip
->state
.samplers
);
556 pstip
->driver_set_sampler_views(pipe
, PIPE_SHADER_FRAGMENT
, 0,
557 num_samplers
, pstip
->state
.sampler_views
);
559 draw
->suspend_flushing
= FALSE
;
561 /* now really draw first triangle */
562 stage
->tri
= draw_pipe_passthrough_tri
;
563 stage
->tri(stage
, header
);
568 pstip_flush(struct draw_stage
*stage
, unsigned flags
)
570 struct draw_context
*draw
= stage
->draw
;
571 struct pstip_stage
*pstip
= pstip_stage(stage
);
572 struct pipe_context
*pipe
= pstip
->pipe
;
574 stage
->tri
= pstip_first_tri
;
575 stage
->next
->flush( stage
->next
, flags
);
577 /* restore original frag shader, texture, sampler state */
578 draw
->suspend_flushing
= TRUE
;
579 pstip
->driver_bind_fs_state(pipe
, pstip
->fs
? pstip
->fs
->driver_fs
: NULL
);
581 pstip
->driver_bind_sampler_states(pipe
, PIPE_SHADER_FRAGMENT
, 0,
583 pstip
->state
.samplers
);
585 pstip
->driver_set_sampler_views(pipe
, PIPE_SHADER_FRAGMENT
, 0,
586 pstip
->num_sampler_views
,
587 pstip
->state
.sampler_views
);
589 draw
->suspend_flushing
= FALSE
;
594 pstip_reset_stipple_counter(struct draw_stage
*stage
)
596 stage
->next
->reset_stipple_counter( stage
->next
);
601 pstip_destroy(struct draw_stage
*stage
)
603 struct pstip_stage
*pstip
= pstip_stage(stage
);
606 for (i
= 0; i
< PIPE_MAX_SHADER_SAMPLER_VIEWS
; i
++) {
607 pipe_sampler_view_reference(&pstip
->state
.sampler_views
[i
], NULL
);
610 pstip
->pipe
->delete_sampler_state(pstip
->pipe
, pstip
->sampler_cso
);
612 pipe_resource_reference(&pstip
->texture
, NULL
);
614 if (pstip
->sampler_view
) {
615 pipe_sampler_view_reference(&pstip
->sampler_view
, NULL
);
618 draw_free_temp_verts( stage
);
623 /** Create a new polygon stipple drawing stage object */
624 static struct pstip_stage
*
625 draw_pstip_stage(struct draw_context
*draw
, struct pipe_context
*pipe
)
627 struct pstip_stage
*pstip
= CALLOC_STRUCT(pstip_stage
);
633 pstip
->stage
.draw
= draw
;
634 pstip
->stage
.name
= "pstip";
635 pstip
->stage
.next
= NULL
;
636 pstip
->stage
.point
= draw_pipe_passthrough_point
;
637 pstip
->stage
.line
= draw_pipe_passthrough_line
;
638 pstip
->stage
.tri
= pstip_first_tri
;
639 pstip
->stage
.flush
= pstip_flush
;
640 pstip
->stage
.reset_stipple_counter
= pstip_reset_stipple_counter
;
641 pstip
->stage
.destroy
= pstip_destroy
;
643 if (!draw_alloc_temp_verts( &pstip
->stage
, 8 ))
650 pstip
->stage
.destroy( &pstip
->stage
);
656 static struct pstip_stage
*
657 pstip_stage_from_pipe(struct pipe_context
*pipe
)
659 struct draw_context
*draw
= (struct draw_context
*) pipe
->draw
;
660 return pstip_stage(draw
->pipeline
.pstipple
);
665 * This function overrides the driver's create_fs_state() function and
666 * will typically be called by the state tracker.
669 pstip_create_fs_state(struct pipe_context
*pipe
,
670 const struct pipe_shader_state
*fs
)
672 struct pstip_stage
*pstip
= pstip_stage_from_pipe(pipe
);
673 struct pstip_fragment_shader
*pstipfs
= CALLOC_STRUCT(pstip_fragment_shader
);
676 pstipfs
->state
= *fs
;
679 pstipfs
->driver_fs
= pstip
->driver_create_fs_state(pstip
->pipe
, fs
);
687 pstip_bind_fs_state(struct pipe_context
*pipe
, void *fs
)
689 struct pstip_stage
*pstip
= pstip_stage_from_pipe(pipe
);
690 struct pstip_fragment_shader
*pstipfs
= (struct pstip_fragment_shader
*) fs
;
694 pstip
->driver_bind_fs_state(pstip
->pipe
,
695 (pstipfs
? pstipfs
->driver_fs
: NULL
));
700 pstip_delete_fs_state(struct pipe_context
*pipe
, void *fs
)
702 struct pstip_stage
*pstip
= pstip_stage_from_pipe(pipe
);
703 struct pstip_fragment_shader
*pstipfs
= (struct pstip_fragment_shader
*) fs
;
705 pstip
->driver_delete_fs_state(pstip
->pipe
, pstipfs
->driver_fs
);
707 if (pstipfs
->pstip_fs
)
708 pstip
->driver_delete_fs_state(pstip
->pipe
, pstipfs
->pstip_fs
);
715 pstip_bind_sampler_states(struct pipe_context
*pipe
, unsigned shader
,
716 unsigned start
, unsigned num
, void **sampler
)
718 struct pstip_stage
*pstip
= pstip_stage_from_pipe(pipe
);
723 if (shader
== PIPE_SHADER_FRAGMENT
) {
725 memcpy(pstip
->state
.samplers
, sampler
, num
* sizeof(void *));
726 for (i
= num
; i
< PIPE_MAX_SAMPLERS
; i
++) {
727 pstip
->state
.samplers
[i
] = NULL
;
729 pstip
->num_samplers
= num
;
733 pstip
->driver_bind_sampler_states(pstip
->pipe
, shader
, start
, num
, sampler
);
738 pstip_set_sampler_views(struct pipe_context
*pipe
,
739 unsigned shader
, unsigned start
, unsigned num
,
740 struct pipe_sampler_view
**views
)
742 struct pstip_stage
*pstip
= pstip_stage_from_pipe(pipe
);
745 if (shader
== PIPE_SHADER_FRAGMENT
) {
747 for (i
= 0; i
< num
; i
++) {
748 pipe_sampler_view_reference(&pstip
->state
.sampler_views
[start
+ i
],
751 pstip
->num_sampler_views
= num
;
755 pstip
->driver_set_sampler_views(pstip
->pipe
, shader
, start
, num
, views
);
760 pstip_set_polygon_stipple(struct pipe_context
*pipe
,
761 const struct pipe_poly_stipple
*stipple
)
763 struct pstip_stage
*pstip
= pstip_stage_from_pipe(pipe
);
766 pstip
->state
.stipple
= stipple
;
769 pstip
->driver_set_polygon_stipple(pstip
->pipe
, stipple
);
771 pstip_update_texture(pstip
);
776 * Called by drivers that want to install this polygon stipple stage
777 * into the draw module's pipeline. This will not be used if the
778 * hardware has native support for polygon stipple.
781 draw_install_pstipple_stage(struct draw_context
*draw
,
782 struct pipe_context
*pipe
)
784 struct pstip_stage
*pstip
;
786 pipe
->draw
= (void *) draw
;
789 * Create / install pgon stipple drawing / prim stage
791 pstip
= draw_pstip_stage( draw
, pipe
);
795 draw
->pipeline
.pstipple
= &pstip
->stage
;
797 /* create special texture, sampler state */
798 if (!pstip_create_texture(pstip
))
801 if (!pstip_create_sampler(pstip
))
804 /* save original driver functions */
805 pstip
->driver_create_fs_state
= pipe
->create_fs_state
;
806 pstip
->driver_bind_fs_state
= pipe
->bind_fs_state
;
807 pstip
->driver_delete_fs_state
= pipe
->delete_fs_state
;
809 pstip
->driver_bind_sampler_states
= pipe
->bind_sampler_states
;
810 pstip
->driver_set_sampler_views
= pipe
->set_sampler_views
;
811 pstip
->driver_set_polygon_stipple
= pipe
->set_polygon_stipple
;
813 /* override the driver's functions */
814 pipe
->create_fs_state
= pstip_create_fs_state
;
815 pipe
->bind_fs_state
= pstip_bind_fs_state
;
816 pipe
->delete_fs_state
= pstip_delete_fs_state
;
818 pipe
->bind_sampler_states
= pstip_bind_sampler_states
;
819 pipe
->set_sampler_views
= pstip_set_sampler_views
;
820 pipe
->set_polygon_stipple
= pstip_set_polygon_stipple
;
826 pstip
->stage
.destroy( &pstip
->stage
);