1 /**************************************************************************
3 * Copyright 2007 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 * AA line stage: AA lines are converted to texture mapped triangles.
35 #include "pipe/p_context.h"
36 #include "pipe/p_defines.h"
37 #include "pipe/p_shader_tokens.h"
38 #include "util/u_inlines.h"
40 #include "util/u_format.h"
41 #include "util/u_math.h"
42 #include "util/u_memory.h"
43 #include "util/u_sampler.h"
45 #include "tgsi/tgsi_transform.h"
46 #include "tgsi/tgsi_dump.h"
48 #include "draw_context.h"
49 #include "draw_private.h"
50 #include "draw_pipe.h"
53 /** Approx number of new tokens for instructions in aa_transform_inst() */
54 #define NUM_NEW_TOKENS 50
58 * Max texture level for the alpha texture used for antialiasing
60 #define MAX_TEXTURE_LEVEL 5 /* 32 x 32 */
64 * Subclass of pipe_shader_state to carry extra fragment shader info.
66 struct aaline_fragment_shader
68 struct pipe_shader_state state
;
72 int generic_attrib
; /**< texcoord/generic used for texture */
77 * Subclass of draw_stage
81 struct draw_stage stage
;
83 float half_line_width
;
85 /** For AA lines, this is the vertex attrib slot for the new texcoords */
87 /** position, not necessarily output zero */
91 struct pipe_texture
*texture
;
92 struct pipe_sampler_view
*sampler_view
;
94 uint num_sampler_views
;
98 * Currently bound state
100 struct aaline_fragment_shader
*fs
;
102 void *sampler
[PIPE_MAX_SAMPLERS
];
103 struct pipe_sampler_view
*sampler_views
[PIPE_MAX_SAMPLERS
];
107 * Driver interface/override functions
109 void * (*driver_create_fs_state
)(struct pipe_context
*,
110 const struct pipe_shader_state
*);
111 void (*driver_bind_fs_state
)(struct pipe_context
*, void *);
112 void (*driver_delete_fs_state
)(struct pipe_context
*, void *);
114 void (*driver_bind_sampler_states
)(struct pipe_context
*, unsigned,
116 void (*driver_set_sampler_views
)(struct pipe_context
*,
118 struct pipe_sampler_view
**);
120 struct pipe_context
*pipe
;
126 * Subclass of tgsi_transform_context, used for transforming the
127 * user's fragment shader to add the special AA instructions.
129 struct aa_transform_context
{
130 struct tgsi_transform_context base
;
131 uint tempsUsed
; /**< bitmask */
132 int colorOutput
; /**< which output is the primary color */
133 uint samplersUsed
; /**< bitfield of samplers used */
134 int freeSampler
; /** an available sampler for the pstipple */
135 int maxInput
, maxGeneric
; /**< max input index found */
136 int colorTemp
, texTemp
; /**< temp registers */
137 boolean firstInstruction
;
142 * TGSI declaration transform callback.
143 * Look for a free sampler, a free input attrib, and two free temp regs.
146 aa_transform_decl(struct tgsi_transform_context
*ctx
,
147 struct tgsi_full_declaration
*decl
)
149 struct aa_transform_context
*aactx
= (struct aa_transform_context
*) ctx
;
151 if (decl
->Declaration
.File
== TGSI_FILE_OUTPUT
&&
152 decl
->Semantic
.Name
== TGSI_SEMANTIC_COLOR
&&
153 decl
->Semantic
.Index
== 0) {
154 aactx
->colorOutput
= decl
->Range
.First
;
156 else if (decl
->Declaration
.File
== TGSI_FILE_SAMPLER
) {
158 for (i
= decl
->Range
.First
;
159 i
<= decl
->Range
.Last
; i
++) {
160 aactx
->samplersUsed
|= 1 << i
;
163 else if (decl
->Declaration
.File
== TGSI_FILE_INPUT
) {
164 if ((int) decl
->Range
.Last
> aactx
->maxInput
)
165 aactx
->maxInput
= decl
->Range
.Last
;
166 if (decl
->Semantic
.Name
== TGSI_SEMANTIC_GENERIC
&&
167 (int) decl
->Semantic
.Index
> aactx
->maxGeneric
) {
168 aactx
->maxGeneric
= decl
->Semantic
.Index
;
171 else if (decl
->Declaration
.File
== TGSI_FILE_TEMPORARY
) {
173 for (i
= decl
->Range
.First
;
174 i
<= decl
->Range
.Last
; i
++) {
175 aactx
->tempsUsed
|= (1 << i
);
179 ctx
->emit_declaration(ctx
, decl
);
184 * Find the lowest zero bit in the given word, or -1 if bitfield is all ones.
187 free_bit(uint bitfield
)
189 return ffs(~bitfield
) - 1;
194 * TGSI instruction transform callback.
195 * Replace writes to result.color w/ a temp reg.
196 * Upon END instruction, insert texture sampling code for antialiasing.
199 aa_transform_inst(struct tgsi_transform_context
*ctx
,
200 struct tgsi_full_instruction
*inst
)
202 struct aa_transform_context
*aactx
= (struct aa_transform_context
*) ctx
;
204 if (aactx
->firstInstruction
) {
205 /* emit our new declarations before the first instruction */
207 struct tgsi_full_declaration decl
;
210 /* find free sampler */
211 aactx
->freeSampler
= free_bit(aactx
->samplersUsed
);
212 if (aactx
->freeSampler
>= PIPE_MAX_SAMPLERS
)
213 aactx
->freeSampler
= PIPE_MAX_SAMPLERS
- 1;
215 /* find two free temp regs */
216 for (i
= 0; i
< 32; i
++) {
217 if ((aactx
->tempsUsed
& (1 << i
)) == 0) {
218 /* found a free temp */
219 if (aactx
->colorTemp
< 0)
220 aactx
->colorTemp
= i
;
221 else if (aactx
->texTemp
< 0)
227 assert(aactx
->colorTemp
>= 0);
228 assert(aactx
->texTemp
>= 0);
230 /* declare new generic input/texcoord */
231 decl
= tgsi_default_full_declaration();
232 decl
.Declaration
.File
= TGSI_FILE_INPUT
;
233 /* XXX this could be linear... */
234 decl
.Declaration
.Interpolate
= TGSI_INTERPOLATE_PERSPECTIVE
;
235 decl
.Declaration
.Semantic
= 1;
236 decl
.Semantic
.Name
= TGSI_SEMANTIC_GENERIC
;
237 decl
.Semantic
.Index
= aactx
->maxGeneric
+ 1;
239 decl
.Range
.Last
= aactx
->maxInput
+ 1;
240 ctx
->emit_declaration(ctx
, &decl
);
242 /* declare new sampler */
243 decl
= tgsi_default_full_declaration();
244 decl
.Declaration
.File
= TGSI_FILE_SAMPLER
;
246 decl
.Range
.Last
= aactx
->freeSampler
;
247 ctx
->emit_declaration(ctx
, &decl
);
249 /* declare new temp regs */
250 decl
= tgsi_default_full_declaration();
251 decl
.Declaration
.File
= TGSI_FILE_TEMPORARY
;
253 decl
.Range
.Last
= aactx
->texTemp
;
254 ctx
->emit_declaration(ctx
, &decl
);
256 decl
= tgsi_default_full_declaration();
257 decl
.Declaration
.File
= TGSI_FILE_TEMPORARY
;
259 decl
.Range
.Last
= aactx
->colorTemp
;
260 ctx
->emit_declaration(ctx
, &decl
);
262 aactx
->firstInstruction
= FALSE
;
265 if (inst
->Instruction
.Opcode
== TGSI_OPCODE_END
&&
266 aactx
->colorOutput
!= -1) {
267 struct tgsi_full_instruction newInst
;
270 newInst
= tgsi_default_full_instruction();
271 newInst
.Instruction
.Opcode
= TGSI_OPCODE_TEX
;
272 newInst
.Instruction
.NumDstRegs
= 1;
273 newInst
.Dst
[0].Register
.File
= TGSI_FILE_TEMPORARY
;
274 newInst
.Dst
[0].Register
.Index
= aactx
->texTemp
;
275 newInst
.Instruction
.NumSrcRegs
= 2;
276 newInst
.Instruction
.Texture
= TRUE
;
277 newInst
.Texture
.Texture
= TGSI_TEXTURE_2D
;
278 newInst
.Src
[0].Register
.File
= TGSI_FILE_INPUT
;
279 newInst
.Src
[0].Register
.Index
= aactx
->maxInput
+ 1;
280 newInst
.Src
[1].Register
.File
= TGSI_FILE_SAMPLER
;
281 newInst
.Src
[1].Register
.Index
= aactx
->freeSampler
;
283 ctx
->emit_instruction(ctx
, &newInst
);
286 newInst
= tgsi_default_full_instruction();
287 newInst
.Instruction
.Opcode
= TGSI_OPCODE_MOV
;
288 newInst
.Instruction
.NumDstRegs
= 1;
289 newInst
.Dst
[0].Register
.File
= TGSI_FILE_OUTPUT
;
290 newInst
.Dst
[0].Register
.Index
= aactx
->colorOutput
;
291 newInst
.Dst
[0].Register
.WriteMask
= TGSI_WRITEMASK_XYZ
;
292 newInst
.Instruction
.NumSrcRegs
= 1;
293 newInst
.Src
[0].Register
.File
= TGSI_FILE_TEMPORARY
;
294 newInst
.Src
[0].Register
.Index
= aactx
->colorTemp
;
295 ctx
->emit_instruction(ctx
, &newInst
);
298 newInst
= tgsi_default_full_instruction();
299 newInst
.Instruction
.Opcode
= TGSI_OPCODE_MUL
;
300 newInst
.Instruction
.NumDstRegs
= 1;
301 newInst
.Dst
[0].Register
.File
= TGSI_FILE_OUTPUT
;
302 newInst
.Dst
[0].Register
.Index
= aactx
->colorOutput
;
303 newInst
.Dst
[0].Register
.WriteMask
= TGSI_WRITEMASK_W
;
304 newInst
.Instruction
.NumSrcRegs
= 2;
305 newInst
.Src
[0].Register
.File
= TGSI_FILE_TEMPORARY
;
306 newInst
.Src
[0].Register
.Index
= aactx
->colorTemp
;
307 newInst
.Src
[1].Register
.File
= TGSI_FILE_TEMPORARY
;
308 newInst
.Src
[1].Register
.Index
= aactx
->texTemp
;
309 ctx
->emit_instruction(ctx
, &newInst
);
312 newInst
= tgsi_default_full_instruction();
313 newInst
.Instruction
.Opcode
= TGSI_OPCODE_END
;
314 newInst
.Instruction
.NumDstRegs
= 0;
315 newInst
.Instruction
.NumSrcRegs
= 0;
316 ctx
->emit_instruction(ctx
, &newInst
);
319 /* Not an END instruction.
320 * Look for writes to result.color and replace with colorTemp reg.
324 for (i
= 0; i
< inst
->Instruction
.NumDstRegs
; i
++) {
325 struct tgsi_full_dst_register
*dst
= &inst
->Dst
[i
];
326 if (dst
->Register
.File
== TGSI_FILE_OUTPUT
&&
327 dst
->Register
.Index
== aactx
->colorOutput
) {
328 dst
->Register
.File
= TGSI_FILE_TEMPORARY
;
329 dst
->Register
.Index
= aactx
->colorTemp
;
333 ctx
->emit_instruction(ctx
, inst
);
339 * Generate the frag shader we'll use for drawing AA lines.
340 * This will be the user's shader plus some texture/modulate instructions.
343 generate_aaline_fs(struct aaline_stage
*aaline
)
345 const struct pipe_shader_state
*orig_fs
= &aaline
->fs
->state
;
346 struct pipe_shader_state aaline_fs
;
347 struct aa_transform_context transform
;
348 const uint newLen
= tgsi_num_tokens(orig_fs
->tokens
) + NUM_NEW_TOKENS
;
350 aaline_fs
= *orig_fs
; /* copy to init */
351 aaline_fs
.tokens
= tgsi_alloc_tokens(newLen
);
352 if (aaline_fs
.tokens
== NULL
)
355 memset(&transform
, 0, sizeof(transform
));
356 transform
.colorOutput
= -1;
357 transform
.maxInput
= -1;
358 transform
.maxGeneric
= -1;
359 transform
.colorTemp
= -1;
360 transform
.texTemp
= -1;
361 transform
.firstInstruction
= TRUE
;
362 transform
.base
.transform_instruction
= aa_transform_inst
;
363 transform
.base
.transform_declaration
= aa_transform_decl
;
365 tgsi_transform_shader(orig_fs
->tokens
,
366 (struct tgsi_token
*) aaline_fs
.tokens
,
367 newLen
, &transform
.base
);
370 tgsi_dump(orig_fs
->tokens
, 0);
371 tgsi_dump(aaline_fs
.tokens
, 0);
374 aaline
->fs
->sampler_unit
= transform
.freeSampler
;
376 aaline
->fs
->aaline_fs
377 = aaline
->driver_create_fs_state(aaline
->pipe
, &aaline_fs
);
378 if (aaline
->fs
->aaline_fs
== NULL
)
381 aaline
->fs
->generic_attrib
= transform
.maxGeneric
+ 1;
382 FREE((void *)aaline_fs
.tokens
);
386 FREE((void *)aaline_fs
.tokens
);
392 * Create the texture map we'll use for antialiasing the lines.
395 aaline_create_texture(struct aaline_stage
*aaline
)
397 struct pipe_context
*pipe
= aaline
->pipe
;
398 struct pipe_screen
*screen
= pipe
->screen
;
399 struct pipe_texture texTemp
;
400 struct pipe_sampler_view viewTempl
;
403 memset(&texTemp
, 0, sizeof(texTemp
));
404 texTemp
.target
= PIPE_TEXTURE_2D
;
405 texTemp
.format
= PIPE_FORMAT_A8_UNORM
; /* XXX verify supported by driver! */
406 texTemp
.last_level
= MAX_TEXTURE_LEVEL
;
407 texTemp
.width0
= 1 << MAX_TEXTURE_LEVEL
;
408 texTemp
.height0
= 1 << MAX_TEXTURE_LEVEL
;
411 aaline
->texture
= screen
->texture_create(screen
, &texTemp
);
412 if (!aaline
->texture
)
415 u_sampler_view_default_template(&viewTempl
,
417 aaline
->texture
->format
);
418 aaline
->sampler_view
= pipe
->create_sampler_view(pipe
,
421 if (!aaline
->sampler_view
) {
425 /* Fill in mipmap images.
426 * Basically each level is solid opaque, except for the outermost
427 * texels which are zero. Special case the 1x1 and 2x2 levels.
429 for (level
= 0; level
<= MAX_TEXTURE_LEVEL
; level
++) {
430 struct pipe_transfer
*transfer
;
431 const uint size
= u_minify(aaline
->texture
->width0
, level
);
435 assert(aaline
->texture
->width0
== aaline
->texture
->height0
);
437 /* This texture is new, no need to flush.
439 transfer
= pipe
->get_tex_transfer(pipe
, aaline
->texture
, 0, level
, 0,
440 PIPE_TRANSFER_WRITE
, 0, 0, size
, size
);
441 data
= pipe
->transfer_map(pipe
, transfer
);
445 for (i
= 0; i
< size
; i
++) {
446 for (j
= 0; j
< size
; j
++) {
451 else if (size
== 2) {
452 d
= 200; /* tuneable */
454 else if (i
== 0 || j
== 0 || i
== size
- 1 || j
== size
- 1) {
460 data
[i
* transfer
->stride
+ j
] = d
;
465 pipe
->transfer_unmap(pipe
, transfer
);
466 pipe
->tex_transfer_destroy(pipe
, transfer
);
473 * Create the sampler CSO that'll be used for antialiasing.
474 * By using a mipmapped texture, we don't have to generate a different
475 * texture image for each line size.
478 aaline_create_sampler(struct aaline_stage
*aaline
)
480 struct pipe_sampler_state sampler
;
481 struct pipe_context
*pipe
= aaline
->pipe
;
483 memset(&sampler
, 0, sizeof(sampler
));
484 sampler
.wrap_s
= PIPE_TEX_WRAP_CLAMP_TO_EDGE
;
485 sampler
.wrap_t
= PIPE_TEX_WRAP_CLAMP_TO_EDGE
;
486 sampler
.wrap_r
= PIPE_TEX_WRAP_CLAMP_TO_EDGE
;
487 sampler
.min_mip_filter
= PIPE_TEX_MIPFILTER_LINEAR
;
488 sampler
.min_img_filter
= PIPE_TEX_FILTER_LINEAR
;
489 sampler
.mag_img_filter
= PIPE_TEX_FILTER_LINEAR
;
490 sampler
.normalized_coords
= 1;
491 sampler
.min_lod
= 0.0f
;
492 sampler
.max_lod
= MAX_TEXTURE_LEVEL
;
494 aaline
->sampler_cso
= pipe
->create_sampler_state(pipe
, &sampler
);
495 if (aaline
->sampler_cso
== NULL
)
503 * When we're about to draw our first AA line in a batch, this function is
504 * called to tell the driver to bind our modified fragment shader.
507 bind_aaline_fragment_shader(struct aaline_stage
*aaline
)
509 struct draw_context
*draw
= aaline
->stage
.draw
;
511 if (!aaline
->fs
->aaline_fs
&&
512 !generate_aaline_fs(aaline
))
515 draw
->suspend_flushing
= TRUE
;
516 aaline
->driver_bind_fs_state(aaline
->pipe
, aaline
->fs
->aaline_fs
);
517 draw
->suspend_flushing
= FALSE
;
524 static INLINE
struct aaline_stage
*
525 aaline_stage( struct draw_stage
*stage
)
527 return (struct aaline_stage
*) stage
;
532 * Draw a wide line by drawing a quad, using geometry which will
533 * fullfill GL's antialiased line requirements.
536 aaline_line(struct draw_stage
*stage
, struct prim_header
*header
)
538 const struct aaline_stage
*aaline
= aaline_stage(stage
);
539 const float half_width
= aaline
->half_line_width
;
540 struct prim_header tri
;
541 struct vertex_header
*v
[8];
542 uint texPos
= aaline
->tex_slot
;
543 uint posPos
= aaline
->pos_slot
;
545 float dx
= header
->v
[1]->data
[posPos
][0] - header
->v
[0]->data
[posPos
][0];
546 float dy
= header
->v
[1]->data
[posPos
][1] - header
->v
[0]->data
[posPos
][1];
547 double a
= atan2(dy
, dx
);
548 float c_a
= (float) cos(a
), s_a
= (float) sin(a
);
551 /* XXX the ends of lines aren't quite perfect yet, but probably passable */
552 dx
= 0.5F
* half_width
;
555 /* allocate/dup new verts */
556 for (i
= 0; i
< 8; i
++) {
557 v
[i
] = dup_vert(stage
, header
->v
[i
/4], i
);
561 * Quad strip for line from v0 to v1 (*=endpoints):
564 * +---+---------------------+---+
568 * +---+---------------------+---+
573 pos
= v
[0]->data
[posPos
];
574 pos
[0] += (-dx
* c_a
- dy
* s_a
);
575 pos
[1] += (-dx
* s_a
+ dy
* c_a
);
577 pos
= v
[1]->data
[posPos
];
578 pos
[0] += (-dx
* c_a
- -dy
* s_a
);
579 pos
[1] += (-dx
* s_a
+ -dy
* c_a
);
581 pos
= v
[2]->data
[posPos
];
582 pos
[0] += ( dx
* c_a
- dy
* s_a
);
583 pos
[1] += ( dx
* s_a
+ dy
* c_a
);
585 pos
= v
[3]->data
[posPos
];
586 pos
[0] += ( dx
* c_a
- -dy
* s_a
);
587 pos
[1] += ( dx
* s_a
+ -dy
* c_a
);
589 pos
= v
[4]->data
[posPos
];
590 pos
[0] += (-dx
* c_a
- dy
* s_a
);
591 pos
[1] += (-dx
* s_a
+ dy
* c_a
);
593 pos
= v
[5]->data
[posPos
];
594 pos
[0] += (-dx
* c_a
- -dy
* s_a
);
595 pos
[1] += (-dx
* s_a
+ -dy
* c_a
);
597 pos
= v
[6]->data
[posPos
];
598 pos
[0] += ( dx
* c_a
- dy
* s_a
);
599 pos
[1] += ( dx
* s_a
+ dy
* c_a
);
601 pos
= v
[7]->data
[posPos
];
602 pos
[0] += ( dx
* c_a
- -dy
* s_a
);
603 pos
[1] += ( dx
* s_a
+ -dy
* c_a
);
606 tex
= v
[0]->data
[texPos
];
607 ASSIGN_4V(tex
, 0, 0, 0, 1);
609 tex
= v
[1]->data
[texPos
];
610 ASSIGN_4V(tex
, 0, 1, 0, 1);
612 tex
= v
[2]->data
[texPos
];
613 ASSIGN_4V(tex
, .5, 0, 0, 1);
615 tex
= v
[3]->data
[texPos
];
616 ASSIGN_4V(tex
, .5, 1, 0, 1);
618 tex
= v
[4]->data
[texPos
];
619 ASSIGN_4V(tex
, .5, 0, 0, 1);
621 tex
= v
[5]->data
[texPos
];
622 ASSIGN_4V(tex
, .5, 1, 0, 1);
624 tex
= v
[6]->data
[texPos
];
625 ASSIGN_4V(tex
, 1, 0, 0, 1);
627 tex
= v
[7]->data
[texPos
];
628 ASSIGN_4V(tex
, 1, 1, 0, 1);
630 /* emit 6 tris for the quad strip */
631 tri
.v
[0] = v
[2]; tri
.v
[1] = v
[1]; tri
.v
[2] = v
[0];
632 stage
->next
->tri( stage
->next
, &tri
);
634 tri
.v
[0] = v
[3]; tri
.v
[1] = v
[1]; tri
.v
[2] = v
[2];
635 stage
->next
->tri( stage
->next
, &tri
);
637 tri
.v
[0] = v
[4]; tri
.v
[1] = v
[3]; tri
.v
[2] = v
[2];
638 stage
->next
->tri( stage
->next
, &tri
);
640 tri
.v
[0] = v
[5]; tri
.v
[1] = v
[3]; tri
.v
[2] = v
[4];
641 stage
->next
->tri( stage
->next
, &tri
);
643 tri
.v
[0] = v
[6]; tri
.v
[1] = v
[5]; tri
.v
[2] = v
[4];
644 stage
->next
->tri( stage
->next
, &tri
);
646 tri
.v
[0] = v
[7]; tri
.v
[1] = v
[5]; tri
.v
[2] = v
[6];
647 stage
->next
->tri( stage
->next
, &tri
);
652 aaline_first_line(struct draw_stage
*stage
, struct prim_header
*header
)
654 auto struct aaline_stage
*aaline
= aaline_stage(stage
);
655 struct draw_context
*draw
= stage
->draw
;
656 struct pipe_context
*pipe
= aaline
->pipe
;
659 assert(draw
->rasterizer
->line_smooth
);
661 if (draw
->rasterizer
->line_width
<= 3.0)
662 aaline
->half_line_width
= 1.5f
;
664 aaline
->half_line_width
= 0.5f
* draw
->rasterizer
->line_width
;
667 * Bind (generate) our fragprog, sampler and texture
669 if (!bind_aaline_fragment_shader(aaline
)) {
670 stage
->line
= draw_pipe_passthrough_line
;
671 stage
->line(stage
, header
);
675 /* update vertex attrib info */
676 aaline
->tex_slot
= draw_current_shader_outputs(draw
);
677 aaline
->pos_slot
= draw_current_shader_position_output(draw
);;
679 /* advertise the extra post-transformed vertex attribute */
680 draw
->extra_shader_outputs
.semantic_name
= TGSI_SEMANTIC_GENERIC
;
681 draw
->extra_shader_outputs
.semantic_index
= aaline
->fs
->generic_attrib
;
682 draw
->extra_shader_outputs
.slot
= aaline
->tex_slot
;
684 /* how many samplers? */
685 /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */
686 num_samplers
= MAX2(aaline
->num_sampler_views
, aaline
->num_samplers
);
687 num_samplers
= MAX2(num_samplers
, aaline
->fs
->sampler_unit
+ 1);
689 aaline
->state
.sampler
[aaline
->fs
->sampler_unit
] = aaline
->sampler_cso
;
690 pipe_sampler_view_reference(&aaline
->state
.sampler_views
[aaline
->fs
->sampler_unit
],
691 aaline
->sampler_view
);
693 draw
->suspend_flushing
= TRUE
;
694 aaline
->driver_bind_sampler_states(pipe
, num_samplers
, aaline
->state
.sampler
);
695 aaline
->driver_set_sampler_views(pipe
, num_samplers
, aaline
->state
.sampler_views
);
696 draw
->suspend_flushing
= FALSE
;
698 /* now really draw first line */
699 stage
->line
= aaline_line
;
700 stage
->line(stage
, header
);
705 aaline_flush(struct draw_stage
*stage
, unsigned flags
)
707 struct draw_context
*draw
= stage
->draw
;
708 struct aaline_stage
*aaline
= aaline_stage(stage
);
709 struct pipe_context
*pipe
= aaline
->pipe
;
711 stage
->line
= aaline_first_line
;
712 stage
->next
->flush( stage
->next
, flags
);
714 /* restore original frag shader, texture, sampler state */
715 draw
->suspend_flushing
= TRUE
;
716 aaline
->driver_bind_fs_state(pipe
, aaline
->fs
->driver_fs
);
717 aaline
->driver_bind_sampler_states(pipe
, aaline
->num_samplers
,
718 aaline
->state
.sampler
);
719 aaline
->driver_set_sampler_views(pipe
,
720 aaline
->num_sampler_views
,
721 aaline
->state
.sampler_views
);
722 draw
->suspend_flushing
= FALSE
;
724 draw
->extra_shader_outputs
.slot
= 0;
729 aaline_reset_stipple_counter(struct draw_stage
*stage
)
731 stage
->next
->reset_stipple_counter( stage
->next
);
736 aaline_destroy(struct draw_stage
*stage
)
738 struct aaline_stage
*aaline
= aaline_stage(stage
);
741 for (i
= 0; i
< PIPE_MAX_SAMPLERS
; i
++) {
742 pipe_sampler_view_reference(&aaline
->state
.sampler_views
[i
], NULL
);
745 if (aaline
->sampler_cso
)
746 aaline
->pipe
->delete_sampler_state(aaline
->pipe
, aaline
->sampler_cso
);
749 pipe_texture_reference(&aaline
->texture
, NULL
);
751 if (aaline
->sampler_view
) {
752 pipe_sampler_view_reference(&aaline
->sampler_view
, NULL
);
755 draw_free_temp_verts( stage
);
761 static struct aaline_stage
*
762 draw_aaline_stage(struct draw_context
*draw
)
764 struct aaline_stage
*aaline
= CALLOC_STRUCT(aaline_stage
);
768 if (!draw_alloc_temp_verts( &aaline
->stage
, 8 ))
771 aaline
->stage
.draw
= draw
;
772 aaline
->stage
.name
= "aaline";
773 aaline
->stage
.next
= NULL
;
774 aaline
->stage
.point
= draw_pipe_passthrough_point
;
775 aaline
->stage
.line
= aaline_first_line
;
776 aaline
->stage
.tri
= draw_pipe_passthrough_tri
;
777 aaline
->stage
.flush
= aaline_flush
;
778 aaline
->stage
.reset_stipple_counter
= aaline_reset_stipple_counter
;
779 aaline
->stage
.destroy
= aaline_destroy
;
785 aaline_destroy(&aaline
->stage
);
791 static struct aaline_stage
*
792 aaline_stage_from_pipe(struct pipe_context
*pipe
)
794 struct draw_context
*draw
= (struct draw_context
*) pipe
->draw
;
795 return aaline_stage(draw
->pipeline
.aaline
);
800 * This function overrides the driver's create_fs_state() function and
801 * will typically be called by the state tracker.
804 aaline_create_fs_state(struct pipe_context
*pipe
,
805 const struct pipe_shader_state
*fs
)
807 struct aaline_stage
*aaline
= aaline_stage_from_pipe(pipe
);
808 struct aaline_fragment_shader
*aafs
= CALLOC_STRUCT(aaline_fragment_shader
);
815 aafs
->driver_fs
= aaline
->driver_create_fs_state(aaline
->pipe
, fs
);
822 aaline_bind_fs_state(struct pipe_context
*pipe
, void *fs
)
824 struct aaline_stage
*aaline
= aaline_stage_from_pipe(pipe
);
825 struct aaline_fragment_shader
*aafs
= (struct aaline_fragment_shader
*) fs
;
830 aaline
->driver_bind_fs_state(aaline
->pipe
,
831 (aafs
? aafs
->driver_fs
: NULL
));
836 aaline_delete_fs_state(struct pipe_context
*pipe
, void *fs
)
838 struct aaline_stage
*aaline
= aaline_stage_from_pipe(pipe
);
839 struct aaline_fragment_shader
*aafs
= (struct aaline_fragment_shader
*) fs
;
841 aaline
->driver_delete_fs_state(aaline
->pipe
, aafs
->driver_fs
);
844 aaline
->driver_delete_fs_state(aaline
->pipe
, aafs
->aaline_fs
);
851 aaline_bind_sampler_states(struct pipe_context
*pipe
,
852 unsigned num
, void **sampler
)
854 struct aaline_stage
*aaline
= aaline_stage_from_pipe(pipe
);
857 memcpy(aaline
->state
.sampler
, sampler
, num
* sizeof(void *));
858 aaline
->num_samplers
= num
;
861 aaline
->driver_bind_sampler_states(aaline
->pipe
, num
, sampler
);
866 aaline_set_sampler_views(struct pipe_context
*pipe
,
868 struct pipe_sampler_view
**views
)
870 struct aaline_stage
*aaline
= aaline_stage_from_pipe(pipe
);
874 for (i
= 0; i
< num
; i
++) {
875 pipe_sampler_view_reference(&aaline
->state
.sampler_views
[i
], views
[i
]);
877 for ( ; i
< PIPE_MAX_SAMPLERS
; i
++) {
878 pipe_sampler_view_reference(&aaline
->state
.sampler_views
[i
], NULL
);
880 aaline
->num_sampler_views
= num
;
883 aaline
->driver_set_sampler_views(aaline
->pipe
, num
, views
);
888 * Called by drivers that want to install this AA line prim stage
889 * into the draw module's pipeline. This will not be used if the
890 * hardware has native support for AA lines.
893 draw_install_aaline_stage(struct draw_context
*draw
, struct pipe_context
*pipe
)
895 struct aaline_stage
*aaline
;
897 pipe
->draw
= (void *) draw
;
900 * Create / install AA line drawing / prim stage
902 aaline
= draw_aaline_stage( draw
);
908 /* create special texture, sampler state */
909 if (!aaline_create_texture(aaline
))
912 if (!aaline_create_sampler(aaline
))
915 /* save original driver functions */
916 aaline
->driver_create_fs_state
= pipe
->create_fs_state
;
917 aaline
->driver_bind_fs_state
= pipe
->bind_fs_state
;
918 aaline
->driver_delete_fs_state
= pipe
->delete_fs_state
;
920 aaline
->driver_bind_sampler_states
= pipe
->bind_fragment_sampler_states
;
921 aaline
->driver_set_sampler_views
= pipe
->set_fragment_sampler_views
;
923 /* override the driver's functions */
924 pipe
->create_fs_state
= aaline_create_fs_state
;
925 pipe
->bind_fs_state
= aaline_bind_fs_state
;
926 pipe
->delete_fs_state
= aaline_delete_fs_state
;
928 pipe
->bind_fragment_sampler_states
= aaline_bind_sampler_states
;
929 pipe
->set_fragment_sampler_views
= aaline_set_sampler_views
;
931 /* Install once everything is known to be OK:
933 draw
->pipeline
.aaline
= &aaline
->stage
;
939 aaline
->stage
.destroy( &aaline
->stage
);