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"
41 #include "util/u_format.h"
42 #include "util/u_math.h"
43 #include "util/u_memory.h"
45 #include "tgsi/tgsi_transform.h"
46 #include "tgsi/tgsi_dump.h"
48 #include "draw_context.h"
49 #include "draw_pipe.h"
54 * Subclass of pipe_shader_state to carry extra fragment shader info.
56 struct pstip_fragment_shader
58 struct pipe_shader_state state
;
66 * Subclass of draw_stage
70 struct draw_stage stage
;
73 struct pipe_texture
*texture
;
78 * Currently bound state
80 struct pstip_fragment_shader
*fs
;
82 void *samplers
[PIPE_MAX_SAMPLERS
];
83 struct pipe_texture
*textures
[PIPE_MAX_SAMPLERS
];
84 const struct pipe_poly_stipple
*stipple
;
88 * Driver interface/override functions
90 void * (*driver_create_fs_state
)(struct pipe_context
*,
91 const struct pipe_shader_state
*);
92 void (*driver_bind_fs_state
)(struct pipe_context
*, void *);
93 void (*driver_delete_fs_state
)(struct pipe_context
*, void *);
95 void (*driver_bind_sampler_states
)(struct pipe_context
*, unsigned, void **);
97 void (*driver_set_sampler_textures
)(struct pipe_context
*, unsigned,
98 struct pipe_texture
**);
100 void (*driver_set_polygon_stipple
)(struct pipe_context
*,
101 const struct pipe_poly_stipple
*);
103 struct pipe_context
*pipe
;
109 * Subclass of tgsi_transform_context, used for transforming the
110 * user's fragment shader to add the special AA instructions.
112 struct pstip_transform_context
{
113 struct tgsi_transform_context base
;
114 uint tempsUsed
; /**< bitmask */
117 uint samplersUsed
; /**< bitfield of samplers used */
118 int freeSampler
; /** an available sampler for the pstipple */
119 int texTemp
; /**< temp registers */
121 boolean firstInstruction
;
126 * TGSI declaration transform callback.
127 * Look for a free sampler, a free input attrib, and two free temp regs.
130 pstip_transform_decl(struct tgsi_transform_context
*ctx
,
131 struct tgsi_full_declaration
*decl
)
133 struct pstip_transform_context
*pctx
= (struct pstip_transform_context
*) ctx
;
135 if (decl
->Declaration
.File
== TGSI_FILE_SAMPLER
) {
137 for (i
= decl
->Range
.First
;
138 i
<= decl
->Range
.Last
; i
++) {
139 pctx
->samplersUsed
|= 1 << i
;
142 else if (decl
->Declaration
.File
== TGSI_FILE_INPUT
) {
143 pctx
->maxInput
= MAX2(pctx
->maxInput
, (int) decl
->Range
.Last
);
144 if (decl
->Semantic
.Name
== TGSI_SEMANTIC_POSITION
)
145 pctx
->wincoordInput
= (int) decl
->Range
.First
;
147 else if (decl
->Declaration
.File
== TGSI_FILE_TEMPORARY
) {
149 for (i
= decl
->Range
.First
;
150 i
<= decl
->Range
.Last
; i
++) {
151 pctx
->tempsUsed
|= (1 << i
);
155 ctx
->emit_declaration(ctx
, decl
);
160 pstip_transform_immed(struct tgsi_transform_context
*ctx
,
161 struct tgsi_full_immediate
*immed
)
163 struct pstip_transform_context
*pctx
= (struct pstip_transform_context
*) ctx
;
169 * Find the lowest zero bit in the given word, or -1 if bitfield is all ones.
172 free_bit(uint bitfield
)
175 for (i
= 0; i
< 32; i
++) {
176 if ((bitfield
& (1 << i
)) == 0)
184 * TGSI instruction transform callback.
185 * Replace writes to result.color w/ a temp reg.
186 * Upon END instruction, insert texture sampling code for antialiasing.
189 pstip_transform_inst(struct tgsi_transform_context
*ctx
,
190 struct tgsi_full_instruction
*inst
)
192 struct pstip_transform_context
*pctx
= (struct pstip_transform_context
*) ctx
;
194 if (pctx
->firstInstruction
) {
195 /* emit our new declarations before the first instruction */
197 struct tgsi_full_declaration decl
;
198 struct tgsi_full_instruction newInst
;
202 /* find free sampler */
203 pctx
->freeSampler
= free_bit(pctx
->samplersUsed
);
204 if (pctx
->freeSampler
>= PIPE_MAX_SAMPLERS
)
205 pctx
->freeSampler
= PIPE_MAX_SAMPLERS
- 1;
207 if (pctx
->wincoordInput
< 0)
208 wincoordInput
= pctx
->maxInput
+ 1;
210 wincoordInput
= pctx
->wincoordInput
;
212 /* find one free temp reg */
213 for (i
= 0; i
< 32; i
++) {
214 if ((pctx
->tempsUsed
& (1 << i
)) == 0) {
215 /* found a free temp */
216 if (pctx
->texTemp
< 0)
222 assert(pctx
->texTemp
>= 0);
224 if (pctx
->wincoordInput
< 0) {
225 /* declare new position input reg */
226 decl
= tgsi_default_full_declaration();
227 decl
.Declaration
.File
= TGSI_FILE_INPUT
;
228 decl
.Declaration
.Interpolate
= TGSI_INTERPOLATE_LINEAR
; /* XXX? */
229 decl
.Declaration
.Semantic
= 1;
230 decl
.Semantic
.Name
= TGSI_SEMANTIC_POSITION
;
231 decl
.Semantic
.Index
= 0;
233 decl
.Range
.Last
= wincoordInput
;
234 ctx
->emit_declaration(ctx
, &decl
);
237 /* declare new sampler */
238 decl
= tgsi_default_full_declaration();
239 decl
.Declaration
.File
= TGSI_FILE_SAMPLER
;
241 decl
.Range
.Last
= pctx
->freeSampler
;
242 ctx
->emit_declaration(ctx
, &decl
);
244 /* declare new temp regs */
245 decl
= tgsi_default_full_declaration();
246 decl
.Declaration
.File
= TGSI_FILE_TEMPORARY
;
248 decl
.Range
.Last
= pctx
->texTemp
;
249 ctx
->emit_declaration(ctx
, &decl
);
251 /* emit immediate = {1/32, 1/32, 1, 1}
252 * The index/position of this immediate will be pctx->numImmed
255 static const float value
[4] = { 1.0/32, 1.0/32, 1.0, 1.0 };
256 struct tgsi_full_immediate immed
;
258 immed
= tgsi_default_full_immediate();
259 immed
.Immediate
.NrTokens
= 1 + size
; /* one for the token itself */
260 immed
.u
[0].Float
= value
[0];
261 immed
.u
[1].Float
= value
[1];
262 immed
.u
[2].Float
= value
[2];
263 immed
.u
[3].Float
= value
[3];
264 ctx
->emit_immediate(ctx
, &immed
);
267 pctx
->firstInstruction
= FALSE
;
271 * Insert new MUL/TEX/KILP instructions at start of program
272 * Take gl_FragCoord, divide by 32 (stipple size), sample the
273 * texture and kill fragment if needed.
275 * We'd like to use non-normalized texcoords to index into a RECT
276 * texture, but we can only use GL_REPEAT wrap mode with normalized
280 /* MUL texTemp, INPUT[wincoord], 1/32; */
281 newInst
= tgsi_default_full_instruction();
282 newInst
.Instruction
.Opcode
= TGSI_OPCODE_MUL
;
283 newInst
.Instruction
.NumDstRegs
= 1;
284 newInst
.Dst
[0].Register
.File
= TGSI_FILE_TEMPORARY
;
285 newInst
.Dst
[0].Register
.Index
= pctx
->texTemp
;
286 newInst
.Instruction
.NumSrcRegs
= 2;
287 newInst
.Src
[0].Register
.File
= TGSI_FILE_INPUT
;
288 newInst
.Src
[0].Register
.Index
= wincoordInput
;
289 newInst
.Src
[1].Register
.File
= TGSI_FILE_IMMEDIATE
;
290 newInst
.Src
[1].Register
.Index
= pctx
->numImmed
;
291 ctx
->emit_instruction(ctx
, &newInst
);
293 /* TEX texTemp, texTemp, sampler; */
294 newInst
= tgsi_default_full_instruction();
295 newInst
.Instruction
.Opcode
= TGSI_OPCODE_TEX
;
296 newInst
.Instruction
.NumDstRegs
= 1;
297 newInst
.Dst
[0].Register
.File
= TGSI_FILE_TEMPORARY
;
298 newInst
.Dst
[0].Register
.Index
= pctx
->texTemp
;
299 newInst
.Instruction
.NumSrcRegs
= 2;
300 newInst
.Instruction
.Texture
= TRUE
;
301 newInst
.Texture
.Texture
= TGSI_TEXTURE_2D
;
302 newInst
.Src
[0].Register
.File
= TGSI_FILE_TEMPORARY
;
303 newInst
.Src
[0].Register
.Index
= pctx
->texTemp
;
304 newInst
.Src
[1].Register
.File
= TGSI_FILE_SAMPLER
;
305 newInst
.Src
[1].Register
.Index
= pctx
->freeSampler
;
306 ctx
->emit_instruction(ctx
, &newInst
);
308 /* KIL -texTemp; # if -texTemp < 0, KILL fragment */
309 newInst
= tgsi_default_full_instruction();
310 newInst
.Instruction
.Opcode
= TGSI_OPCODE_KIL
;
311 newInst
.Instruction
.NumDstRegs
= 0;
312 newInst
.Instruction
.NumSrcRegs
= 1;
313 newInst
.Src
[0].Register
.File
= TGSI_FILE_TEMPORARY
;
314 newInst
.Src
[0].Register
.Index
= pctx
->texTemp
;
315 newInst
.Src
[0].Register
.Negate
= 1;
316 ctx
->emit_instruction(ctx
, &newInst
);
319 /* emit this instruction */
320 ctx
->emit_instruction(ctx
, inst
);
325 * Generate the frag shader we'll use for doing polygon stipple.
326 * This will be the user's shader prefixed with a TEX and KIL instruction.
329 generate_pstip_fs(struct pstip_stage
*pstip
)
331 const struct pipe_shader_state
*orig_fs
= &pstip
->fs
->state
;
332 /*struct draw_context *draw = pstip->stage.draw;*/
333 struct pipe_shader_state pstip_fs
;
334 struct pstip_transform_context transform
;
338 pstip_fs
= *orig_fs
; /* copy to init */
339 pstip_fs
.tokens
= MALLOC(sizeof(struct tgsi_token
) * MAX
);
340 if (pstip_fs
.tokens
== NULL
)
343 memset(&transform
, 0, sizeof(transform
));
344 transform
.wincoordInput
= -1;
345 transform
.maxInput
= -1;
346 transform
.texTemp
= -1;
347 transform
.firstInstruction
= TRUE
;
348 transform
.base
.transform_instruction
= pstip_transform_inst
;
349 transform
.base
.transform_declaration
= pstip_transform_decl
;
350 transform
.base
.transform_immediate
= pstip_transform_immed
;
352 tgsi_transform_shader(orig_fs
->tokens
,
353 (struct tgsi_token
*) pstip_fs
.tokens
,
354 MAX
, &transform
.base
);
357 tgsi_dump(orig_fs
->tokens
, 0);
358 tgsi_dump(pstip_fs
.tokens
, 0);
361 pstip
->fs
->sampler_unit
= transform
.freeSampler
;
362 assert(pstip
->fs
->sampler_unit
< PIPE_MAX_SAMPLERS
);
364 pstip
->fs
->pstip_fs
= pstip
->driver_create_fs_state(pstip
->pipe
, &pstip_fs
);
366 FREE((void *)pstip_fs
.tokens
);
372 * Load texture image with current stipple pattern.
375 pstip_update_texture(struct pstip_stage
*pstip
)
377 static const uint bit31
= 1 << 31;
378 struct pipe_context
*pipe
= pstip
->pipe
;
379 struct pipe_screen
*screen
= pipe
->screen
;
380 struct pipe_transfer
*transfer
;
381 const uint
*stipple
= pstip
->state
.stipple
->stipple
;
385 /* XXX: want to avoid flushing just because we use stipple:
387 pipe
->flush( pipe
, PIPE_FLUSH_TEXTURE_CACHE
, NULL
);
389 transfer
= screen
->get_tex_transfer(screen
, pstip
->texture
, 0, 0, 0,
390 PIPE_TRANSFER_WRITE
, 0, 0, 32, 32);
391 data
= screen
->transfer_map(screen
, transfer
);
394 * Load alpha texture.
395 * Note: 0 means keep the fragment, 255 means kill it.
396 * We'll negate the texel value and use KILP which kills if value
399 for (i
= 0; i
< 32; i
++) {
400 for (j
= 0; j
< 32; j
++) {
401 if (stipple
[i
] & (bit31
>> j
)) {
403 data
[i
* transfer
->stride
+ j
] = 0;
407 data
[i
* transfer
->stride
+ j
] = 255;
413 screen
->transfer_unmap(screen
, transfer
);
414 screen
->tex_transfer_destroy(transfer
);
419 * Create the texture map we'll use for stippling.
422 pstip_create_texture(struct pstip_stage
*pstip
)
424 struct pipe_context
*pipe
= pstip
->pipe
;
425 struct pipe_screen
*screen
= pipe
->screen
;
426 struct pipe_texture texTemp
;
428 memset(&texTemp
, 0, sizeof(texTemp
));
429 texTemp
.target
= PIPE_TEXTURE_2D
;
430 texTemp
.format
= PIPE_FORMAT_A8_UNORM
; /* XXX verify supported by driver! */
431 texTemp
.last_level
= 0;
433 texTemp
.height0
= 32;
436 pstip
->texture
= screen
->texture_create(screen
, &texTemp
);
437 if (pstip
->texture
== NULL
)
445 * Create the sampler CSO that'll be used for stippling.
448 pstip_create_sampler(struct pstip_stage
*pstip
)
450 struct pipe_sampler_state sampler
;
451 struct pipe_context
*pipe
= pstip
->pipe
;
453 memset(&sampler
, 0, sizeof(sampler
));
454 sampler
.wrap_s
= PIPE_TEX_WRAP_REPEAT
;
455 sampler
.wrap_t
= PIPE_TEX_WRAP_REPEAT
;
456 sampler
.wrap_r
= PIPE_TEX_WRAP_REPEAT
;
457 sampler
.min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
458 sampler
.min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
459 sampler
.mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
460 sampler
.normalized_coords
= 1;
461 sampler
.min_lod
= 0.0f
;
462 sampler
.max_lod
= 0.0f
;
464 pstip
->sampler_cso
= pipe
->create_sampler_state(pipe
, &sampler
);
465 if (pstip
->sampler_cso
== NULL
)
473 * When we're about to draw our first stipple polygon in a batch, this function
474 * is called to tell the driver to bind our modified fragment shader.
477 bind_pstip_fragment_shader(struct pstip_stage
*pstip
)
479 struct draw_context
*draw
= pstip
->stage
.draw
;
480 if (!pstip
->fs
->pstip_fs
&&
481 !generate_pstip_fs(pstip
))
484 draw
->suspend_flushing
= TRUE
;
485 pstip
->driver_bind_fs_state(pstip
->pipe
, pstip
->fs
->pstip_fs
);
486 draw
->suspend_flushing
= FALSE
;
491 static INLINE
struct pstip_stage
*
492 pstip_stage( struct draw_stage
*stage
)
494 return (struct pstip_stage
*) stage
;
499 pstip_first_tri(struct draw_stage
*stage
, struct prim_header
*header
)
501 struct pstip_stage
*pstip
= pstip_stage(stage
);
502 struct pipe_context
*pipe
= pstip
->pipe
;
503 struct draw_context
*draw
= stage
->draw
;
506 assert(stage
->draw
->rasterizer
->poly_stipple_enable
);
508 /* bind our fragprog */
509 if (!bind_pstip_fragment_shader(pstip
)) {
510 stage
->tri
= draw_pipe_passthrough_tri
;
511 stage
->tri(stage
, header
);
516 /* how many samplers? */
517 /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */
518 num_samplers
= MAX2(pstip
->num_textures
, pstip
->num_samplers
);
519 num_samplers
= MAX2(num_samplers
, pstip
->fs
->sampler_unit
+ 1);
521 /* plug in our sampler, texture */
522 pstip
->state
.samplers
[pstip
->fs
->sampler_unit
] = pstip
->sampler_cso
;
523 pipe_texture_reference(&pstip
->state
.textures
[pstip
->fs
->sampler_unit
],
526 assert(num_samplers
<= PIPE_MAX_SAMPLERS
);
528 draw
->suspend_flushing
= TRUE
;
529 pstip
->driver_bind_sampler_states(pipe
, num_samplers
, pstip
->state
.samplers
);
530 pstip
->driver_set_sampler_textures(pipe
, num_samplers
, pstip
->state
.textures
);
531 draw
->suspend_flushing
= FALSE
;
533 /* now really draw first triangle */
534 stage
->tri
= draw_pipe_passthrough_tri
;
535 stage
->tri(stage
, header
);
540 pstip_flush(struct draw_stage
*stage
, unsigned flags
)
542 struct draw_context
*draw
= stage
->draw
;
543 struct pstip_stage
*pstip
= pstip_stage(stage
);
544 struct pipe_context
*pipe
= pstip
->pipe
;
546 stage
->tri
= pstip_first_tri
;
547 stage
->next
->flush( stage
->next
, flags
);
549 /* restore original frag shader, texture, sampler state */
550 draw
->suspend_flushing
= TRUE
;
551 pstip
->driver_bind_fs_state(pipe
, pstip
->fs
->driver_fs
);
552 pstip
->driver_bind_sampler_states(pipe
, pstip
->num_samplers
,
553 pstip
->state
.samplers
);
554 pstip
->driver_set_sampler_textures(pipe
, pstip
->num_textures
,
555 pstip
->state
.textures
);
556 draw
->suspend_flushing
= FALSE
;
561 pstip_reset_stipple_counter(struct draw_stage
*stage
)
563 stage
->next
->reset_stipple_counter( stage
->next
);
568 pstip_destroy(struct draw_stage
*stage
)
570 struct pstip_stage
*pstip
= pstip_stage(stage
);
573 for (i
= 0; i
< PIPE_MAX_SAMPLERS
; i
++) {
574 pipe_texture_reference(&pstip
->state
.textures
[i
], NULL
);
577 pstip
->pipe
->delete_sampler_state(pstip
->pipe
, pstip
->sampler_cso
);
579 pipe_texture_reference(&pstip
->texture
, NULL
);
581 draw_free_temp_verts( stage
);
586 static struct pstip_stage
*
587 draw_pstip_stage(struct draw_context
*draw
)
589 struct pstip_stage
*pstip
= CALLOC_STRUCT(pstip_stage
);
591 draw_alloc_temp_verts( &pstip
->stage
, 8 );
593 pstip
->stage
.draw
= draw
;
594 pstip
->stage
.name
= "pstip";
595 pstip
->stage
.next
= NULL
;
596 pstip
->stage
.point
= draw_pipe_passthrough_point
;
597 pstip
->stage
.line
= draw_pipe_passthrough_line
;
598 pstip
->stage
.tri
= pstip_first_tri
;
599 pstip
->stage
.flush
= pstip_flush
;
600 pstip
->stage
.reset_stipple_counter
= pstip_reset_stipple_counter
;
601 pstip
->stage
.destroy
= pstip_destroy
;
607 static struct pstip_stage
*
608 pstip_stage_from_pipe(struct pipe_context
*pipe
)
610 struct draw_context
*draw
= (struct draw_context
*) pipe
->draw
;
611 return pstip_stage(draw
->pipeline
.pstipple
);
616 * This function overrides the driver's create_fs_state() function and
617 * will typically be called by the state tracker.
620 pstip_create_fs_state(struct pipe_context
*pipe
,
621 const struct pipe_shader_state
*fs
)
623 struct pstip_stage
*pstip
= pstip_stage_from_pipe(pipe
);
624 struct pstip_fragment_shader
*aafs
= CALLOC_STRUCT(pstip_fragment_shader
);
630 aafs
->driver_fs
= pstip
->driver_create_fs_state(pstip
->pipe
, fs
);
638 pstip_bind_fs_state(struct pipe_context
*pipe
, void *fs
)
640 struct pstip_stage
*pstip
= pstip_stage_from_pipe(pipe
);
641 struct pstip_fragment_shader
*aafs
= (struct pstip_fragment_shader
*) fs
;
645 pstip
->driver_bind_fs_state(pstip
->pipe
,
646 (aafs
? aafs
->driver_fs
: NULL
));
651 pstip_delete_fs_state(struct pipe_context
*pipe
, void *fs
)
653 struct pstip_stage
*pstip
= pstip_stage_from_pipe(pipe
);
654 struct pstip_fragment_shader
*aafs
= (struct pstip_fragment_shader
*) fs
;
656 pstip
->driver_delete_fs_state(pstip
->pipe
, aafs
->driver_fs
);
659 pstip
->driver_delete_fs_state(pstip
->pipe
, aafs
->pstip_fs
);
666 pstip_bind_sampler_states(struct pipe_context
*pipe
,
667 unsigned num
, void **sampler
)
669 struct pstip_stage
*pstip
= pstip_stage_from_pipe(pipe
);
673 memcpy(pstip
->state
.samplers
, sampler
, num
* sizeof(void *));
674 for (i
= num
; i
< PIPE_MAX_SAMPLERS
; i
++) {
675 pstip
->state
.samplers
[i
] = NULL
;
678 pstip
->num_samplers
= num
;
680 pstip
->driver_bind_sampler_states(pstip
->pipe
, num
, sampler
);
685 pstip_set_sampler_textures(struct pipe_context
*pipe
,
686 unsigned num
, struct pipe_texture
**texture
)
688 struct pstip_stage
*pstip
= pstip_stage_from_pipe(pipe
);
692 for (i
= 0; i
< num
; i
++) {
693 pipe_texture_reference(&pstip
->state
.textures
[i
], texture
[i
]);
695 for (; i
< PIPE_MAX_SAMPLERS
; i
++) {
696 pipe_texture_reference(&pstip
->state
.textures
[i
], NULL
);
699 pstip
->num_textures
= num
;
702 pstip
->driver_set_sampler_textures(pstip
->pipe
, num
, texture
);
707 pstip_set_polygon_stipple(struct pipe_context
*pipe
,
708 const struct pipe_poly_stipple
*stipple
)
710 struct pstip_stage
*pstip
= pstip_stage_from_pipe(pipe
);
713 pstip
->state
.stipple
= stipple
;
716 pstip
->driver_set_polygon_stipple(pstip
->pipe
, stipple
);
718 pstip_update_texture(pstip
);
723 * Called by drivers that want to install this polygon stipple stage
724 * into the draw module's pipeline. This will not be used if the
725 * hardware has native support for polygon stipple.
728 draw_install_pstipple_stage(struct draw_context
*draw
,
729 struct pipe_context
*pipe
)
731 struct pstip_stage
*pstip
;
733 pipe
->draw
= (void *) draw
;
736 * Create / install pgon stipple drawing / prim stage
738 pstip
= draw_pstip_stage( draw
);
742 draw
->pipeline
.pstipple
= &pstip
->stage
;
746 /* create special texture, sampler state */
747 if (!pstip_create_texture(pstip
))
750 if (!pstip_create_sampler(pstip
))
753 /* save original driver functions */
754 pstip
->driver_create_fs_state
= pipe
->create_fs_state
;
755 pstip
->driver_bind_fs_state
= pipe
->bind_fs_state
;
756 pstip
->driver_delete_fs_state
= pipe
->delete_fs_state
;
758 pstip
->driver_bind_sampler_states
= pipe
->bind_fragment_sampler_states
;
759 pstip
->driver_set_sampler_textures
= pipe
->set_fragment_sampler_textures
;
760 pstip
->driver_set_polygon_stipple
= pipe
->set_polygon_stipple
;
762 /* override the driver's functions */
763 pipe
->create_fs_state
= pstip_create_fs_state
;
764 pipe
->bind_fs_state
= pstip_bind_fs_state
;
765 pipe
->delete_fs_state
= pstip_delete_fs_state
;
767 pipe
->bind_fragment_sampler_states
= pstip_bind_sampler_states
;
768 pipe
->set_fragment_sampler_textures
= pstip_set_sampler_textures
;
769 pipe
->set_polygon_stipple
= pstip_set_polygon_stipple
;
775 pstip
->stage
.destroy( &pstip
->stage
);