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_resource
*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_resource 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
->resource_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
;
432 const uint size
= u_minify(aaline
->texture
->width0
, level
);
436 assert(aaline
->texture
->width0
== aaline
->texture
->height0
);
438 u_box_origin_2d( size
, size
, &box
);
440 /* This texture is new, no need to flush.
442 transfer
= pipe
->get_transfer(pipe
,
444 u_subresource(0, level
),
448 data
= pipe
->transfer_map(pipe
, transfer
);
452 for (i
= 0; i
< size
; i
++) {
453 for (j
= 0; j
< size
; j
++) {
458 else if (size
== 2) {
459 d
= 200; /* tuneable */
461 else if (i
== 0 || j
== 0 || i
== size
- 1 || j
== size
- 1) {
467 data
[i
* transfer
->stride
+ j
] = d
;
472 pipe
->transfer_unmap(pipe
, transfer
);
473 pipe
->transfer_destroy(pipe
, transfer
);
480 * Create the sampler CSO that'll be used for antialiasing.
481 * By using a mipmapped texture, we don't have to generate a different
482 * texture image for each line size.
485 aaline_create_sampler(struct aaline_stage
*aaline
)
487 struct pipe_sampler_state sampler
;
488 struct pipe_context
*pipe
= aaline
->pipe
;
490 memset(&sampler
, 0, sizeof(sampler
));
491 sampler
.wrap_s
= PIPE_TEX_WRAP_CLAMP_TO_EDGE
;
492 sampler
.wrap_t
= PIPE_TEX_WRAP_CLAMP_TO_EDGE
;
493 sampler
.wrap_r
= PIPE_TEX_WRAP_CLAMP_TO_EDGE
;
494 sampler
.min_mip_filter
= PIPE_TEX_MIPFILTER_LINEAR
;
495 sampler
.min_img_filter
= PIPE_TEX_FILTER_LINEAR
;
496 sampler
.mag_img_filter
= PIPE_TEX_FILTER_LINEAR
;
497 sampler
.normalized_coords
= 1;
498 sampler
.min_lod
= 0.0f
;
499 sampler
.max_lod
= MAX_TEXTURE_LEVEL
;
501 aaline
->sampler_cso
= pipe
->create_sampler_state(pipe
, &sampler
);
502 if (aaline
->sampler_cso
== NULL
)
510 * When we're about to draw our first AA line in a batch, this function is
511 * called to tell the driver to bind our modified fragment shader.
514 bind_aaline_fragment_shader(struct aaline_stage
*aaline
)
516 struct draw_context
*draw
= aaline
->stage
.draw
;
518 if (!aaline
->fs
->aaline_fs
&&
519 !generate_aaline_fs(aaline
))
522 draw
->suspend_flushing
= TRUE
;
523 aaline
->driver_bind_fs_state(aaline
->pipe
, aaline
->fs
->aaline_fs
);
524 draw
->suspend_flushing
= FALSE
;
531 static INLINE
struct aaline_stage
*
532 aaline_stage( struct draw_stage
*stage
)
534 return (struct aaline_stage
*) stage
;
539 * Draw a wide line by drawing a quad, using geometry which will
540 * fullfill GL's antialiased line requirements.
543 aaline_line(struct draw_stage
*stage
, struct prim_header
*header
)
545 const struct aaline_stage
*aaline
= aaline_stage(stage
);
546 const float half_width
= aaline
->half_line_width
;
547 struct prim_header tri
;
548 struct vertex_header
*v
[8];
549 uint texPos
= aaline
->tex_slot
;
550 uint posPos
= aaline
->pos_slot
;
552 float dx
= header
->v
[1]->data
[posPos
][0] - header
->v
[0]->data
[posPos
][0];
553 float dy
= header
->v
[1]->data
[posPos
][1] - header
->v
[0]->data
[posPos
][1];
554 double a
= atan2(dy
, dx
);
555 float c_a
= (float) cos(a
), s_a
= (float) sin(a
);
558 /* XXX the ends of lines aren't quite perfect yet, but probably passable */
559 dx
= 0.5F
* half_width
;
562 /* allocate/dup new verts */
563 for (i
= 0; i
< 8; i
++) {
564 v
[i
] = dup_vert(stage
, header
->v
[i
/4], i
);
568 * Quad strip for line from v0 to v1 (*=endpoints):
571 * +---+---------------------+---+
575 * +---+---------------------+---+
580 pos
= v
[0]->data
[posPos
];
581 pos
[0] += (-dx
* c_a
- dy
* s_a
);
582 pos
[1] += (-dx
* s_a
+ dy
* c_a
);
584 pos
= v
[1]->data
[posPos
];
585 pos
[0] += (-dx
* c_a
- -dy
* s_a
);
586 pos
[1] += (-dx
* s_a
+ -dy
* c_a
);
588 pos
= v
[2]->data
[posPos
];
589 pos
[0] += ( dx
* c_a
- dy
* s_a
);
590 pos
[1] += ( dx
* s_a
+ dy
* c_a
);
592 pos
= v
[3]->data
[posPos
];
593 pos
[0] += ( dx
* c_a
- -dy
* s_a
);
594 pos
[1] += ( dx
* s_a
+ -dy
* c_a
);
596 pos
= v
[4]->data
[posPos
];
597 pos
[0] += (-dx
* c_a
- dy
* s_a
);
598 pos
[1] += (-dx
* s_a
+ dy
* c_a
);
600 pos
= v
[5]->data
[posPos
];
601 pos
[0] += (-dx
* c_a
- -dy
* s_a
);
602 pos
[1] += (-dx
* s_a
+ -dy
* c_a
);
604 pos
= v
[6]->data
[posPos
];
605 pos
[0] += ( dx
* c_a
- dy
* s_a
);
606 pos
[1] += ( dx
* s_a
+ dy
* c_a
);
608 pos
= v
[7]->data
[posPos
];
609 pos
[0] += ( dx
* c_a
- -dy
* s_a
);
610 pos
[1] += ( dx
* s_a
+ -dy
* c_a
);
613 tex
= v
[0]->data
[texPos
];
614 ASSIGN_4V(tex
, 0, 0, 0, 1);
616 tex
= v
[1]->data
[texPos
];
617 ASSIGN_4V(tex
, 0, 1, 0, 1);
619 tex
= v
[2]->data
[texPos
];
620 ASSIGN_4V(tex
, .5, 0, 0, 1);
622 tex
= v
[3]->data
[texPos
];
623 ASSIGN_4V(tex
, .5, 1, 0, 1);
625 tex
= v
[4]->data
[texPos
];
626 ASSIGN_4V(tex
, .5, 0, 0, 1);
628 tex
= v
[5]->data
[texPos
];
629 ASSIGN_4V(tex
, .5, 1, 0, 1);
631 tex
= v
[6]->data
[texPos
];
632 ASSIGN_4V(tex
, 1, 0, 0, 1);
634 tex
= v
[7]->data
[texPos
];
635 ASSIGN_4V(tex
, 1, 1, 0, 1);
637 /* emit 6 tris for the quad strip */
638 tri
.v
[0] = v
[2]; tri
.v
[1] = v
[1]; tri
.v
[2] = v
[0];
639 stage
->next
->tri( stage
->next
, &tri
);
641 tri
.v
[0] = v
[3]; tri
.v
[1] = v
[1]; tri
.v
[2] = v
[2];
642 stage
->next
->tri( stage
->next
, &tri
);
644 tri
.v
[0] = v
[4]; tri
.v
[1] = v
[3]; tri
.v
[2] = v
[2];
645 stage
->next
->tri( stage
->next
, &tri
);
647 tri
.v
[0] = v
[5]; tri
.v
[1] = v
[3]; tri
.v
[2] = v
[4];
648 stage
->next
->tri( stage
->next
, &tri
);
650 tri
.v
[0] = v
[6]; tri
.v
[1] = v
[5]; tri
.v
[2] = v
[4];
651 stage
->next
->tri( stage
->next
, &tri
);
653 tri
.v
[0] = v
[7]; tri
.v
[1] = v
[5]; tri
.v
[2] = v
[6];
654 stage
->next
->tri( stage
->next
, &tri
);
659 aaline_first_line(struct draw_stage
*stage
, struct prim_header
*header
)
661 auto struct aaline_stage
*aaline
= aaline_stage(stage
);
662 struct draw_context
*draw
= stage
->draw
;
663 struct pipe_context
*pipe
= aaline
->pipe
;
666 assert(draw
->rasterizer
->line_smooth
);
668 if (draw
->rasterizer
->line_width
<= 3.0)
669 aaline
->half_line_width
= 1.5f
;
671 aaline
->half_line_width
= 0.5f
* draw
->rasterizer
->line_width
;
674 * Bind (generate) our fragprog, sampler and texture
676 if (!bind_aaline_fragment_shader(aaline
)) {
677 stage
->line
= draw_pipe_passthrough_line
;
678 stage
->line(stage
, header
);
682 /* update vertex attrib info */
683 aaline
->tex_slot
= draw_current_shader_outputs(draw
);
684 aaline
->pos_slot
= draw_current_shader_position_output(draw
);;
686 /* advertise the extra post-transformed vertex attribute */
687 draw
->extra_shader_outputs
.semantic_name
= TGSI_SEMANTIC_GENERIC
;
688 draw
->extra_shader_outputs
.semantic_index
= aaline
->fs
->generic_attrib
;
689 draw
->extra_shader_outputs
.slot
= aaline
->tex_slot
;
691 /* how many samplers? */
692 /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */
693 num_samplers
= MAX2(aaline
->num_sampler_views
, aaline
->num_samplers
);
694 num_samplers
= MAX2(num_samplers
, aaline
->fs
->sampler_unit
+ 1);
696 aaline
->state
.sampler
[aaline
->fs
->sampler_unit
] = aaline
->sampler_cso
;
697 pipe_sampler_view_reference(&aaline
->state
.sampler_views
[aaline
->fs
->sampler_unit
],
698 aaline
->sampler_view
);
700 draw
->suspend_flushing
= TRUE
;
701 aaline
->driver_bind_sampler_states(pipe
, num_samplers
, aaline
->state
.sampler
);
702 aaline
->driver_set_sampler_views(pipe
, num_samplers
, aaline
->state
.sampler_views
);
703 draw
->suspend_flushing
= FALSE
;
705 /* now really draw first line */
706 stage
->line
= aaline_line
;
707 stage
->line(stage
, header
);
712 aaline_flush(struct draw_stage
*stage
, unsigned flags
)
714 struct draw_context
*draw
= stage
->draw
;
715 struct aaline_stage
*aaline
= aaline_stage(stage
);
716 struct pipe_context
*pipe
= aaline
->pipe
;
718 stage
->line
= aaline_first_line
;
719 stage
->next
->flush( stage
->next
, flags
);
721 /* restore original frag shader, texture, sampler state */
722 draw
->suspend_flushing
= TRUE
;
723 aaline
->driver_bind_fs_state(pipe
, aaline
->fs
->driver_fs
);
724 aaline
->driver_bind_sampler_states(pipe
, aaline
->num_samplers
,
725 aaline
->state
.sampler
);
726 aaline
->driver_set_sampler_views(pipe
,
727 aaline
->num_sampler_views
,
728 aaline
->state
.sampler_views
);
729 draw
->suspend_flushing
= FALSE
;
731 draw
->extra_shader_outputs
.slot
= 0;
736 aaline_reset_stipple_counter(struct draw_stage
*stage
)
738 stage
->next
->reset_stipple_counter( stage
->next
);
743 aaline_destroy(struct draw_stage
*stage
)
745 struct aaline_stage
*aaline
= aaline_stage(stage
);
748 for (i
= 0; i
< PIPE_MAX_SAMPLERS
; i
++) {
749 pipe_sampler_view_reference(&aaline
->state
.sampler_views
[i
], NULL
);
752 if (aaline
->sampler_cso
)
753 aaline
->pipe
->delete_sampler_state(aaline
->pipe
, aaline
->sampler_cso
);
756 pipe_resource_reference(&aaline
->texture
, NULL
);
758 if (aaline
->sampler_view
) {
759 pipe_sampler_view_reference(&aaline
->sampler_view
, NULL
);
762 draw_free_temp_verts( stage
);
768 static struct aaline_stage
*
769 draw_aaline_stage(struct draw_context
*draw
)
771 struct aaline_stage
*aaline
= CALLOC_STRUCT(aaline_stage
);
775 if (!draw_alloc_temp_verts( &aaline
->stage
, 8 ))
778 aaline
->stage
.draw
= draw
;
779 aaline
->stage
.name
= "aaline";
780 aaline
->stage
.next
= NULL
;
781 aaline
->stage
.point
= draw_pipe_passthrough_point
;
782 aaline
->stage
.line
= aaline_first_line
;
783 aaline
->stage
.tri
= draw_pipe_passthrough_tri
;
784 aaline
->stage
.flush
= aaline_flush
;
785 aaline
->stage
.reset_stipple_counter
= aaline_reset_stipple_counter
;
786 aaline
->stage
.destroy
= aaline_destroy
;
792 aaline_destroy(&aaline
->stage
);
798 static struct aaline_stage
*
799 aaline_stage_from_pipe(struct pipe_context
*pipe
)
801 struct draw_context
*draw
= (struct draw_context
*) pipe
->draw
;
802 return aaline_stage(draw
->pipeline
.aaline
);
807 * This function overrides the driver's create_fs_state() function and
808 * will typically be called by the state tracker.
811 aaline_create_fs_state(struct pipe_context
*pipe
,
812 const struct pipe_shader_state
*fs
)
814 struct aaline_stage
*aaline
= aaline_stage_from_pipe(pipe
);
815 struct aaline_fragment_shader
*aafs
= CALLOC_STRUCT(aaline_fragment_shader
);
822 aafs
->driver_fs
= aaline
->driver_create_fs_state(aaline
->pipe
, fs
);
829 aaline_bind_fs_state(struct pipe_context
*pipe
, void *fs
)
831 struct aaline_stage
*aaline
= aaline_stage_from_pipe(pipe
);
832 struct aaline_fragment_shader
*aafs
= (struct aaline_fragment_shader
*) fs
;
837 aaline
->driver_bind_fs_state(aaline
->pipe
,
838 (aafs
? aafs
->driver_fs
: NULL
));
843 aaline_delete_fs_state(struct pipe_context
*pipe
, void *fs
)
845 struct aaline_stage
*aaline
= aaline_stage_from_pipe(pipe
);
846 struct aaline_fragment_shader
*aafs
= (struct aaline_fragment_shader
*) fs
;
848 aaline
->driver_delete_fs_state(aaline
->pipe
, aafs
->driver_fs
);
851 aaline
->driver_delete_fs_state(aaline
->pipe
, aafs
->aaline_fs
);
858 aaline_bind_sampler_states(struct pipe_context
*pipe
,
859 unsigned num
, void **sampler
)
861 struct aaline_stage
*aaline
= aaline_stage_from_pipe(pipe
);
864 memcpy(aaline
->state
.sampler
, sampler
, num
* sizeof(void *));
865 aaline
->num_samplers
= num
;
868 aaline
->driver_bind_sampler_states(aaline
->pipe
, num
, sampler
);
873 aaline_set_sampler_views(struct pipe_context
*pipe
,
875 struct pipe_sampler_view
**views
)
877 struct aaline_stage
*aaline
= aaline_stage_from_pipe(pipe
);
881 for (i
= 0; i
< num
; i
++) {
882 pipe_sampler_view_reference(&aaline
->state
.sampler_views
[i
], views
[i
]);
884 for ( ; i
< PIPE_MAX_SAMPLERS
; i
++) {
885 pipe_sampler_view_reference(&aaline
->state
.sampler_views
[i
], NULL
);
887 aaline
->num_sampler_views
= num
;
890 aaline
->driver_set_sampler_views(aaline
->pipe
, num
, views
);
895 * Called by drivers that want to install this AA line prim stage
896 * into the draw module's pipeline. This will not be used if the
897 * hardware has native support for AA lines.
900 draw_install_aaline_stage(struct draw_context
*draw
, struct pipe_context
*pipe
)
902 struct aaline_stage
*aaline
;
904 pipe
->draw
= (void *) draw
;
907 * Create / install AA line drawing / prim stage
909 aaline
= draw_aaline_stage( draw
);
915 /* create special texture, sampler state */
916 if (!aaline_create_texture(aaline
))
919 if (!aaline_create_sampler(aaline
))
922 /* save original driver functions */
923 aaline
->driver_create_fs_state
= pipe
->create_fs_state
;
924 aaline
->driver_bind_fs_state
= pipe
->bind_fs_state
;
925 aaline
->driver_delete_fs_state
= pipe
->delete_fs_state
;
927 aaline
->driver_bind_sampler_states
= pipe
->bind_fragment_sampler_states
;
928 aaline
->driver_set_sampler_views
= pipe
->set_fragment_sampler_views
;
930 /* override the driver's functions */
931 pipe
->create_fs_state
= aaline_create_fs_state
;
932 pipe
->bind_fs_state
= aaline_bind_fs_state
;
933 pipe
->delete_fs_state
= aaline_delete_fs_state
;
935 pipe
->bind_fragment_sampler_states
= aaline_bind_sampler_states
;
936 pipe
->set_fragment_sampler_views
= aaline_set_sampler_views
;
938 /* Install once everything is known to be OK:
940 draw
->pipeline
.aaline
= &aaline
->stage
;
946 aaline
->stage
.destroy( &aaline
->stage
);