1 /**************************************************************************
3 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
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 TUNGSTEN GRAPHICS 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 and does
31 * a fragment kill for the stipple-failing fragments.
37 #include "pipe/p_context.h"
38 #include "pipe/p_defines.h"
39 #include "pipe/p_shader_tokens.h"
40 #include "util/u_inlines.h"
42 #include "util/u_format.h"
43 #include "util/u_math.h"
44 #include "util/u_memory.h"
46 #include "tgsi/tgsi_transform.h"
47 #include "tgsi/tgsi_dump.h"
49 #include "draw_context.h"
50 #include "draw_pipe.h"
53 /** Approx number of new tokens for instructions in pstip_transform_inst() */
54 #define NUM_NEW_TOKENS 50
58 * Subclass of pipe_shader_state to carry extra fragment shader info.
60 struct pstip_fragment_shader
62 struct pipe_shader_state state
;
70 * Subclass of draw_stage
74 struct draw_stage stage
;
77 struct pipe_texture
*texture
;
82 * Currently bound state
84 struct pstip_fragment_shader
*fs
;
86 void *samplers
[PIPE_MAX_SAMPLERS
];
87 struct pipe_texture
*textures
[PIPE_MAX_SAMPLERS
];
88 const struct pipe_poly_stipple
*stipple
;
92 * Driver interface/override functions
94 void * (*driver_create_fs_state
)(struct pipe_context
*,
95 const struct pipe_shader_state
*);
96 void (*driver_bind_fs_state
)(struct pipe_context
*, void *);
97 void (*driver_delete_fs_state
)(struct pipe_context
*, void *);
99 void (*driver_bind_sampler_states
)(struct pipe_context
*, unsigned, void **);
101 void (*driver_set_sampler_textures
)(struct pipe_context
*, unsigned,
102 struct pipe_texture
**);
104 void (*driver_set_polygon_stipple
)(struct pipe_context
*,
105 const struct pipe_poly_stipple
*);
107 struct pipe_context
*pipe
;
113 * Subclass of tgsi_transform_context, used for transforming the
114 * user's fragment shader to add the special AA instructions.
116 struct pstip_transform_context
{
117 struct tgsi_transform_context base
;
118 uint tempsUsed
; /**< bitmask */
121 uint samplersUsed
; /**< bitfield of samplers used */
122 int freeSampler
; /** an available sampler for the pstipple */
123 int texTemp
; /**< temp registers */
125 boolean firstInstruction
;
130 * TGSI declaration transform callback.
131 * Look for a free sampler, a free input attrib, and two free temp regs.
134 pstip_transform_decl(struct tgsi_transform_context
*ctx
,
135 struct tgsi_full_declaration
*decl
)
137 struct pstip_transform_context
*pctx
= (struct pstip_transform_context
*) ctx
;
139 if (decl
->Declaration
.File
== TGSI_FILE_SAMPLER
) {
141 for (i
= decl
->Range
.First
;
142 i
<= decl
->Range
.Last
; i
++) {
143 pctx
->samplersUsed
|= 1 << i
;
146 else if (decl
->Declaration
.File
== TGSI_FILE_INPUT
) {
147 pctx
->maxInput
= MAX2(pctx
->maxInput
, (int) decl
->Range
.Last
);
148 if (decl
->Semantic
.Name
== TGSI_SEMANTIC_POSITION
)
149 pctx
->wincoordInput
= (int) decl
->Range
.First
;
151 else if (decl
->Declaration
.File
== TGSI_FILE_TEMPORARY
) {
153 for (i
= decl
->Range
.First
;
154 i
<= decl
->Range
.Last
; i
++) {
155 pctx
->tempsUsed
|= (1 << i
);
159 ctx
->emit_declaration(ctx
, decl
);
164 pstip_transform_immed(struct tgsi_transform_context
*ctx
,
165 struct tgsi_full_immediate
*immed
)
167 struct pstip_transform_context
*pctx
= (struct pstip_transform_context
*) ctx
;
173 * Find the lowest zero bit in the given word, or -1 if bitfield is all ones.
176 free_bit(uint bitfield
)
178 return ffs(~bitfield
) - 1;
183 * TGSI instruction transform callback.
184 * Replace writes to result.color w/ a temp reg.
185 * Upon END instruction, insert texture sampling code for antialiasing.
188 pstip_transform_inst(struct tgsi_transform_context
*ctx
,
189 struct tgsi_full_instruction
*inst
)
191 struct pstip_transform_context
*pctx
= (struct pstip_transform_context
*) ctx
;
193 if (pctx
->firstInstruction
) {
194 /* emit our new declarations before the first instruction */
196 struct tgsi_full_declaration decl
;
197 struct tgsi_full_instruction newInst
;
201 /* find free sampler */
202 pctx
->freeSampler
= free_bit(pctx
->samplersUsed
);
203 if (pctx
->freeSampler
>= PIPE_MAX_SAMPLERS
)
204 pctx
->freeSampler
= PIPE_MAX_SAMPLERS
- 1;
206 if (pctx
->wincoordInput
< 0)
207 wincoordInput
= pctx
->maxInput
+ 1;
209 wincoordInput
= pctx
->wincoordInput
;
211 /* find one free temp reg */
212 for (i
= 0; i
< 32; i
++) {
213 if ((pctx
->tempsUsed
& (1 << i
)) == 0) {
214 /* found a free temp */
215 if (pctx
->texTemp
< 0)
221 assert(pctx
->texTemp
>= 0);
223 if (pctx
->wincoordInput
< 0) {
224 /* declare new position input reg */
225 decl
= tgsi_default_full_declaration();
226 decl
.Declaration
.File
= TGSI_FILE_INPUT
;
227 decl
.Declaration
.Interpolate
= TGSI_INTERPOLATE_LINEAR
; /* XXX? */
228 decl
.Declaration
.Semantic
= 1;
229 decl
.Semantic
.Name
= TGSI_SEMANTIC_POSITION
;
230 decl
.Semantic
.Index
= 0;
232 decl
.Range
.Last
= wincoordInput
;
233 ctx
->emit_declaration(ctx
, &decl
);
236 /* declare new sampler */
237 decl
= tgsi_default_full_declaration();
238 decl
.Declaration
.File
= TGSI_FILE_SAMPLER
;
240 decl
.Range
.Last
= pctx
->freeSampler
;
241 ctx
->emit_declaration(ctx
, &decl
);
243 /* declare new temp regs */
244 decl
= tgsi_default_full_declaration();
245 decl
.Declaration
.File
= TGSI_FILE_TEMPORARY
;
247 decl
.Range
.Last
= pctx
->texTemp
;
248 ctx
->emit_declaration(ctx
, &decl
);
250 /* emit immediate = {1/32, 1/32, 1, 1}
251 * The index/position of this immediate will be pctx->numImmed
254 static const float value
[4] = { 1.0/32, 1.0/32, 1.0, 1.0 };
255 struct tgsi_full_immediate immed
;
257 immed
= tgsi_default_full_immediate();
258 immed
.Immediate
.NrTokens
= 1 + size
; /* one for the token itself */
259 immed
.u
[0].Float
= value
[0];
260 immed
.u
[1].Float
= value
[1];
261 immed
.u
[2].Float
= value
[2];
262 immed
.u
[3].Float
= value
[3];
263 ctx
->emit_immediate(ctx
, &immed
);
266 pctx
->firstInstruction
= FALSE
;
270 * Insert new MUL/TEX/KILP instructions at start of program
271 * Take gl_FragCoord, divide by 32 (stipple size), sample the
272 * texture and kill fragment if needed.
274 * We'd like to use non-normalized texcoords to index into a RECT
275 * texture, but we can only use GL_REPEAT wrap mode with normalized
279 /* MUL texTemp, INPUT[wincoord], 1/32; */
280 newInst
= tgsi_default_full_instruction();
281 newInst
.Instruction
.Opcode
= TGSI_OPCODE_MUL
;
282 newInst
.Instruction
.NumDstRegs
= 1;
283 newInst
.Dst
[0].Register
.File
= TGSI_FILE_TEMPORARY
;
284 newInst
.Dst
[0].Register
.Index
= pctx
->texTemp
;
285 newInst
.Instruction
.NumSrcRegs
= 2;
286 newInst
.Src
[0].Register
.File
= TGSI_FILE_INPUT
;
287 newInst
.Src
[0].Register
.Index
= wincoordInput
;
288 newInst
.Src
[1].Register
.File
= TGSI_FILE_IMMEDIATE
;
289 newInst
.Src
[1].Register
.Index
= pctx
->numImmed
;
290 ctx
->emit_instruction(ctx
, &newInst
);
292 /* TEX texTemp, texTemp, sampler; */
293 newInst
= tgsi_default_full_instruction();
294 newInst
.Instruction
.Opcode
= TGSI_OPCODE_TEX
;
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
.Instruction
.Texture
= TRUE
;
300 newInst
.Texture
.Texture
= TGSI_TEXTURE_2D
;
301 newInst
.Src
[0].Register
.File
= TGSI_FILE_TEMPORARY
;
302 newInst
.Src
[0].Register
.Index
= pctx
->texTemp
;
303 newInst
.Src
[1].Register
.File
= TGSI_FILE_SAMPLER
;
304 newInst
.Src
[1].Register
.Index
= pctx
->freeSampler
;
305 ctx
->emit_instruction(ctx
, &newInst
);
307 /* KIL -texTemp; # if -texTemp < 0, KILL fragment */
308 newInst
= tgsi_default_full_instruction();
309 newInst
.Instruction
.Opcode
= TGSI_OPCODE_KIL
;
310 newInst
.Instruction
.NumDstRegs
= 0;
311 newInst
.Instruction
.NumSrcRegs
= 1;
312 newInst
.Src
[0].Register
.File
= TGSI_FILE_TEMPORARY
;
313 newInst
.Src
[0].Register
.Index
= pctx
->texTemp
;
314 newInst
.Src
[0].Register
.Negate
= 1;
315 ctx
->emit_instruction(ctx
, &newInst
);
318 /* emit this instruction */
319 ctx
->emit_instruction(ctx
, inst
);
324 * Generate the frag shader we'll use for doing polygon stipple.
325 * This will be the user's shader prefixed with a TEX and KIL instruction.
328 generate_pstip_fs(struct pstip_stage
*pstip
)
330 const struct pipe_shader_state
*orig_fs
= &pstip
->fs
->state
;
331 /*struct draw_context *draw = pstip->stage.draw;*/
332 struct pipe_shader_state pstip_fs
;
333 struct pstip_transform_context transform
;
334 const uint newLen
= tgsi_num_tokens(orig_fs
->tokens
) + NUM_NEW_TOKENS
;
336 pstip_fs
= *orig_fs
; /* copy to init */
337 pstip_fs
.tokens
= tgsi_alloc_tokens(newLen
);
338 if (pstip_fs
.tokens
== NULL
)
341 memset(&transform
, 0, sizeof(transform
));
342 transform
.wincoordInput
= -1;
343 transform
.maxInput
= -1;
344 transform
.texTemp
= -1;
345 transform
.firstInstruction
= TRUE
;
346 transform
.base
.transform_instruction
= pstip_transform_inst
;
347 transform
.base
.transform_declaration
= pstip_transform_decl
;
348 transform
.base
.transform_immediate
= pstip_transform_immed
;
350 tgsi_transform_shader(orig_fs
->tokens
,
351 (struct tgsi_token
*) pstip_fs
.tokens
,
352 newLen
, &transform
.base
);
355 tgsi_dump(orig_fs
->tokens
, 0);
356 tgsi_dump(pstip_fs
.tokens
, 0);
359 pstip
->fs
->sampler_unit
= transform
.freeSampler
;
360 assert(pstip
->fs
->sampler_unit
< PIPE_MAX_SAMPLERS
);
362 pstip
->fs
->pstip_fs
= pstip
->driver_create_fs_state(pstip
->pipe
, &pstip_fs
);
364 FREE((void *)pstip_fs
.tokens
);
370 * Load texture image with current stipple pattern.
373 pstip_update_texture(struct pstip_stage
*pstip
)
375 static const uint bit31
= 1 << 31;
376 struct pipe_context
*pipe
= pstip
->pipe
;
377 struct pipe_screen
*screen
= pipe
->screen
;
378 struct pipe_transfer
*transfer
;
379 const uint
*stipple
= pstip
->state
.stipple
->stipple
;
383 /* XXX: want to avoid flushing just because we use stipple:
385 pipe
->flush( pipe
, PIPE_FLUSH_TEXTURE_CACHE
, NULL
);
387 transfer
= screen
->get_tex_transfer(screen
, pstip
->texture
, 0, 0, 0,
388 PIPE_TRANSFER_WRITE
, 0, 0, 32, 32);
389 data
= screen
->transfer_map(screen
, transfer
);
392 * Load alpha texture.
393 * Note: 0 means keep the fragment, 255 means kill it.
394 * We'll negate the texel value and use KILP which kills if value
397 for (i
= 0; i
< 32; i
++) {
398 for (j
= 0; j
< 32; j
++) {
399 if (stipple
[i
] & (bit31
>> j
)) {
401 data
[i
* transfer
->stride
+ j
] = 0;
405 data
[i
* transfer
->stride
+ j
] = 255;
411 screen
->transfer_unmap(screen
, transfer
);
412 screen
->tex_transfer_destroy(transfer
);
417 * Create the texture map we'll use for stippling.
420 pstip_create_texture(struct pstip_stage
*pstip
)
422 struct pipe_context
*pipe
= pstip
->pipe
;
423 struct pipe_screen
*screen
= pipe
->screen
;
424 struct pipe_texture texTemp
;
426 memset(&texTemp
, 0, sizeof(texTemp
));
427 texTemp
.target
= PIPE_TEXTURE_2D
;
428 texTemp
.format
= PIPE_FORMAT_A8_UNORM
; /* XXX verify supported by driver! */
429 texTemp
.last_level
= 0;
431 texTemp
.height0
= 32;
434 pstip
->texture
= screen
->texture_create(screen
, &texTemp
);
435 if (pstip
->texture
== NULL
)
443 * Create the sampler CSO that'll be used for stippling.
446 pstip_create_sampler(struct pstip_stage
*pstip
)
448 struct pipe_sampler_state sampler
;
449 struct pipe_context
*pipe
= pstip
->pipe
;
451 memset(&sampler
, 0, sizeof(sampler
));
452 sampler
.wrap_s
= PIPE_TEX_WRAP_REPEAT
;
453 sampler
.wrap_t
= PIPE_TEX_WRAP_REPEAT
;
454 sampler
.wrap_r
= PIPE_TEX_WRAP_REPEAT
;
455 sampler
.min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
456 sampler
.min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
457 sampler
.mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
458 sampler
.normalized_coords
= 1;
459 sampler
.min_lod
= 0.0f
;
460 sampler
.max_lod
= 0.0f
;
462 pstip
->sampler_cso
= pipe
->create_sampler_state(pipe
, &sampler
);
463 if (pstip
->sampler_cso
== NULL
)
471 * When we're about to draw our first stipple polygon in a batch, this function
472 * is called to tell the driver to bind our modified fragment shader.
475 bind_pstip_fragment_shader(struct pstip_stage
*pstip
)
477 struct draw_context
*draw
= pstip
->stage
.draw
;
478 if (!pstip
->fs
->pstip_fs
&&
479 !generate_pstip_fs(pstip
))
482 draw
->suspend_flushing
= TRUE
;
483 pstip
->driver_bind_fs_state(pstip
->pipe
, pstip
->fs
->pstip_fs
);
484 draw
->suspend_flushing
= FALSE
;
489 static INLINE
struct pstip_stage
*
490 pstip_stage( struct draw_stage
*stage
)
492 return (struct pstip_stage
*) stage
;
497 pstip_first_tri(struct draw_stage
*stage
, struct prim_header
*header
)
499 struct pstip_stage
*pstip
= pstip_stage(stage
);
500 struct pipe_context
*pipe
= pstip
->pipe
;
501 struct draw_context
*draw
= stage
->draw
;
504 assert(stage
->draw
->rasterizer
->poly_stipple_enable
);
506 /* bind our fragprog */
507 if (!bind_pstip_fragment_shader(pstip
)) {
508 stage
->tri
= draw_pipe_passthrough_tri
;
509 stage
->tri(stage
, header
);
514 /* how many samplers? */
515 /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */
516 num_samplers
= MAX2(pstip
->num_textures
, pstip
->num_samplers
);
517 num_samplers
= MAX2(num_samplers
, pstip
->fs
->sampler_unit
+ 1);
519 /* plug in our sampler, texture */
520 pstip
->state
.samplers
[pstip
->fs
->sampler_unit
] = pstip
->sampler_cso
;
521 pipe_texture_reference(&pstip
->state
.textures
[pstip
->fs
->sampler_unit
],
524 assert(num_samplers
<= PIPE_MAX_SAMPLERS
);
526 draw
->suspend_flushing
= TRUE
;
527 pstip
->driver_bind_sampler_states(pipe
, num_samplers
, pstip
->state
.samplers
);
528 pstip
->driver_set_sampler_textures(pipe
, num_samplers
, pstip
->state
.textures
);
529 draw
->suspend_flushing
= FALSE
;
531 /* now really draw first triangle */
532 stage
->tri
= draw_pipe_passthrough_tri
;
533 stage
->tri(stage
, header
);
538 pstip_flush(struct draw_stage
*stage
, unsigned flags
)
540 struct draw_context
*draw
= stage
->draw
;
541 struct pstip_stage
*pstip
= pstip_stage(stage
);
542 struct pipe_context
*pipe
= pstip
->pipe
;
544 stage
->tri
= pstip_first_tri
;
545 stage
->next
->flush( stage
->next
, flags
);
547 /* restore original frag shader, texture, sampler state */
548 draw
->suspend_flushing
= TRUE
;
549 pstip
->driver_bind_fs_state(pipe
, pstip
->fs
->driver_fs
);
550 pstip
->driver_bind_sampler_states(pipe
, pstip
->num_samplers
,
551 pstip
->state
.samplers
);
552 pstip
->driver_set_sampler_textures(pipe
, pstip
->num_textures
,
553 pstip
->state
.textures
);
554 draw
->suspend_flushing
= FALSE
;
559 pstip_reset_stipple_counter(struct draw_stage
*stage
)
561 stage
->next
->reset_stipple_counter( stage
->next
);
566 pstip_destroy(struct draw_stage
*stage
)
568 struct pstip_stage
*pstip
= pstip_stage(stage
);
571 for (i
= 0; i
< PIPE_MAX_SAMPLERS
; i
++) {
572 pipe_texture_reference(&pstip
->state
.textures
[i
], NULL
);
575 pstip
->pipe
->delete_sampler_state(pstip
->pipe
, pstip
->sampler_cso
);
577 pipe_texture_reference(&pstip
->texture
, NULL
);
579 draw_free_temp_verts( stage
);
584 static struct pstip_stage
*
585 draw_pstip_stage(struct draw_context
*draw
)
587 struct pstip_stage
*pstip
= CALLOC_STRUCT(pstip_stage
);
589 draw_alloc_temp_verts( &pstip
->stage
, 8 );
591 pstip
->stage
.draw
= draw
;
592 pstip
->stage
.name
= "pstip";
593 pstip
->stage
.next
= NULL
;
594 pstip
->stage
.point
= draw_pipe_passthrough_point
;
595 pstip
->stage
.line
= draw_pipe_passthrough_line
;
596 pstip
->stage
.tri
= pstip_first_tri
;
597 pstip
->stage
.flush
= pstip_flush
;
598 pstip
->stage
.reset_stipple_counter
= pstip_reset_stipple_counter
;
599 pstip
->stage
.destroy
= pstip_destroy
;
605 static struct pstip_stage
*
606 pstip_stage_from_pipe(struct pipe_context
*pipe
)
608 struct draw_context
*draw
= (struct draw_context
*) pipe
->draw
;
609 return pstip_stage(draw
->pipeline
.pstipple
);
614 * This function overrides the driver's create_fs_state() function and
615 * will typically be called by the state tracker.
618 pstip_create_fs_state(struct pipe_context
*pipe
,
619 const struct pipe_shader_state
*fs
)
621 struct pstip_stage
*pstip
= pstip_stage_from_pipe(pipe
);
622 struct pstip_fragment_shader
*aafs
= CALLOC_STRUCT(pstip_fragment_shader
);
628 aafs
->driver_fs
= pstip
->driver_create_fs_state(pstip
->pipe
, fs
);
636 pstip_bind_fs_state(struct pipe_context
*pipe
, void *fs
)
638 struct pstip_stage
*pstip
= pstip_stage_from_pipe(pipe
);
639 struct pstip_fragment_shader
*aafs
= (struct pstip_fragment_shader
*) fs
;
643 pstip
->driver_bind_fs_state(pstip
->pipe
,
644 (aafs
? aafs
->driver_fs
: NULL
));
649 pstip_delete_fs_state(struct pipe_context
*pipe
, void *fs
)
651 struct pstip_stage
*pstip
= pstip_stage_from_pipe(pipe
);
652 struct pstip_fragment_shader
*aafs
= (struct pstip_fragment_shader
*) fs
;
654 pstip
->driver_delete_fs_state(pstip
->pipe
, aafs
->driver_fs
);
657 pstip
->driver_delete_fs_state(pstip
->pipe
, aafs
->pstip_fs
);
664 pstip_bind_sampler_states(struct pipe_context
*pipe
,
665 unsigned num
, void **sampler
)
667 struct pstip_stage
*pstip
= pstip_stage_from_pipe(pipe
);
671 memcpy(pstip
->state
.samplers
, sampler
, num
* sizeof(void *));
672 for (i
= num
; i
< PIPE_MAX_SAMPLERS
; i
++) {
673 pstip
->state
.samplers
[i
] = NULL
;
676 pstip
->num_samplers
= num
;
678 pstip
->driver_bind_sampler_states(pstip
->pipe
, num
, sampler
);
683 pstip_set_sampler_textures(struct pipe_context
*pipe
,
684 unsigned num
, struct pipe_texture
**texture
)
686 struct pstip_stage
*pstip
= pstip_stage_from_pipe(pipe
);
690 for (i
= 0; i
< num
; i
++) {
691 pipe_texture_reference(&pstip
->state
.textures
[i
], texture
[i
]);
693 for (; i
< PIPE_MAX_SAMPLERS
; i
++) {
694 pipe_texture_reference(&pstip
->state
.textures
[i
], NULL
);
697 pstip
->num_textures
= num
;
700 pstip
->driver_set_sampler_textures(pstip
->pipe
, num
, texture
);
705 pstip_set_polygon_stipple(struct pipe_context
*pipe
,
706 const struct pipe_poly_stipple
*stipple
)
708 struct pstip_stage
*pstip
= pstip_stage_from_pipe(pipe
);
711 pstip
->state
.stipple
= stipple
;
714 pstip
->driver_set_polygon_stipple(pstip
->pipe
, stipple
);
716 pstip_update_texture(pstip
);
721 * Called by drivers that want to install this polygon stipple stage
722 * into the draw module's pipeline. This will not be used if the
723 * hardware has native support for polygon stipple.
726 draw_install_pstipple_stage(struct draw_context
*draw
,
727 struct pipe_context
*pipe
)
729 struct pstip_stage
*pstip
;
731 pipe
->draw
= (void *) draw
;
734 * Create / install pgon stipple drawing / prim stage
736 pstip
= draw_pstip_stage( draw
);
740 draw
->pipeline
.pstipple
= &pstip
->stage
;
744 /* create special texture, sampler state */
745 if (!pstip_create_texture(pstip
))
748 if (!pstip_create_sampler(pstip
))
751 /* save original driver functions */
752 pstip
->driver_create_fs_state
= pipe
->create_fs_state
;
753 pstip
->driver_bind_fs_state
= pipe
->bind_fs_state
;
754 pstip
->driver_delete_fs_state
= pipe
->delete_fs_state
;
756 pstip
->driver_bind_sampler_states
= pipe
->bind_fragment_sampler_states
;
757 pstip
->driver_set_sampler_textures
= pipe
->set_fragment_sampler_textures
;
758 pstip
->driver_set_polygon_stipple
= pipe
->set_polygon_stipple
;
760 /* override the driver's functions */
761 pipe
->create_fs_state
= pstip_create_fs_state
;
762 pipe
->bind_fs_state
= pstip_bind_fs_state
;
763 pipe
->delete_fs_state
= pstip_delete_fs_state
;
765 pipe
->bind_fragment_sampler_states
= pstip_bind_sampler_states
;
766 pipe
->set_fragment_sampler_textures
= pstip_set_sampler_textures
;
767 pipe
->set_polygon_stipple
= pstip_set_polygon_stipple
;
773 pstip
->stage
.destroy( &pstip
->stage
);