1 /**************************************************************************
3 * Copyright 2009 VMware, Inc.
4 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 **************************************************************************/
31 * Code generate the whole fragment pipeline.
33 * The fragment pipeline consists of the following stages:
38 * - depth/stencil test (stencil TBI)
41 * This file has only the glue to assembly the fragment pipeline. The actual
42 * plumbing of converting Gallium state into LLVM IR is done elsewhere, in the
43 * lp_bld_*.[ch] files, and in a complete generic and reusable way. Here we
44 * muster the LLVM JIT execution engine to create a function that follows an
45 * established binary interface and that can be called from C directly.
47 * A big source of complexity here is that we often want to run different
48 * stages with different precisions and data types and precisions. For example,
49 * the fragment shader needs typically to be done in floats, but the
50 * depth/stencil test and blending is better done in the type that most closely
51 * matches the depth/stencil and color buffer respectively.
53 * Since the width of a SIMD vector register stays the same regardless of the
54 * element type, different types imply different number of elements, so we must
55 * code generate more instances of the stages with larger types to be able to
56 * feed/consume the stages with smaller types.
58 * @author Jose Fonseca <jfonseca@vmware.com>
61 #include "pipe/p_defines.h"
62 #include "util/u_memory.h"
63 #include "util/u_format.h"
64 #include "util/u_debug_dump.h"
65 #include "pipe/internal/p_winsys_screen.h"
66 #include "pipe/p_shader_tokens.h"
67 #include "draw/draw_context.h"
68 #include "tgsi/tgsi_dump.h"
69 #include "tgsi/tgsi_scan.h"
70 #include "tgsi/tgsi_parse.h"
71 #include "lp_bld_type.h"
72 #include "lp_bld_const.h"
73 #include "lp_bld_conv.h"
74 #include "lp_bld_intr.h"
75 #include "lp_bld_logic.h"
76 #include "lp_bld_depth.h"
77 #include "lp_bld_interp.h"
78 #include "lp_bld_tgsi.h"
79 #include "lp_bld_alpha.h"
80 #include "lp_bld_blend.h"
81 #include "lp_bld_swizzle.h"
82 #include "lp_bld_flow.h"
83 #include "lp_bld_debug.h"
84 #include "lp_screen.h"
85 #include "lp_context.h"
90 static const unsigned char quad_offset_x
[4] = {0, 1, 0, 1};
91 static const unsigned char quad_offset_y
[4] = {0, 0, 1, 1};
95 * Derive from the quad's upper left scalar coordinates the coordinates for
96 * all other quad pixels
99 generate_pos0(LLVMBuilderRef builder
,
105 LLVMTypeRef int_elem_type
= LLVMInt32Type();
106 LLVMTypeRef int_vec_type
= LLVMVectorType(int_elem_type
, QUAD_SIZE
);
107 LLVMTypeRef elem_type
= LLVMFloatType();
108 LLVMTypeRef vec_type
= LLVMVectorType(elem_type
, QUAD_SIZE
);
109 LLVMValueRef x_offsets
[QUAD_SIZE
];
110 LLVMValueRef y_offsets
[QUAD_SIZE
];
113 x
= lp_build_broadcast(builder
, int_vec_type
, x
);
114 y
= lp_build_broadcast(builder
, int_vec_type
, y
);
116 for(i
= 0; i
< QUAD_SIZE
; ++i
) {
117 x_offsets
[i
] = LLVMConstInt(int_elem_type
, quad_offset_x
[i
], 0);
118 y_offsets
[i
] = LLVMConstInt(int_elem_type
, quad_offset_y
[i
], 0);
121 x
= LLVMBuildAdd(builder
, x
, LLVMConstVector(x_offsets
, QUAD_SIZE
), "");
122 y
= LLVMBuildAdd(builder
, y
, LLVMConstVector(y_offsets
, QUAD_SIZE
), "");
124 *x0
= LLVMBuildSIToFP(builder
, x
, vec_type
, "");
125 *y0
= LLVMBuildSIToFP(builder
, y
, vec_type
, "");
130 * Generate the depth test.
133 generate_depth(struct llvmpipe_context
*lp
,
134 LLVMBuilderRef builder
,
135 const struct pipe_depth_state
*state
,
136 union lp_type src_type
,
137 struct lp_build_mask_context
*mask
,
139 LLVMValueRef dst_ptr
)
141 const struct util_format_description
*format_desc
;
142 union lp_type dst_type
;
144 if(!lp
->framebuffer
.zsbuf
)
147 format_desc
= util_format_description(lp
->framebuffer
.zsbuf
->format
);
150 /* Pick the depth type. */
151 dst_type
= lp_depth_type(format_desc
, src_type
.width
*src_type
.length
);
153 /* FIXME: Cope with a depth test type with a different bit width. */
154 assert(dst_type
.width
== src_type
.width
);
155 assert(dst_type
.length
== src_type
.length
);
158 src
= lp_build_clamped_float_to_unsigned_norm(builder
,
163 lp_build_conv(builder
, src_type
, dst_type
, &src
, 1, &src
, 1);
166 lp_build_depth_test(builder
,
176 struct build_fetch_texel_context
178 LLVMValueRef context_ptr
;
180 LLVMValueRef samplers_ptr
;
182 /** Coords/texels store */
183 LLVMValueRef store_ptr
;
188 lp_fetch_texel_soa( struct tgsi_sampler
**samplers
,
192 struct tgsi_sampler
*sampler
= samplers
[unit
];
197 debug_printf("%s sampler: %p (%p) store: %p\n",
202 debug_printf("lodbias %f\n", store
[12]);
204 for (j
= 0; j
< 4; j
++)
205 debug_printf("sample %d texcoord %f %f\n",
212 float rgba
[NUM_CHANNELS
][QUAD_SIZE
];
213 sampler
->get_samples(sampler
,
217 0.0f
, /*store[12], lodbias */
219 memcpy(store
, rgba
, sizeof rgba
);
223 for (j
= 0; j
< 4; j
++)
224 debug_printf("sample %d result %f %f %f %f\n",
235 emit_fetch_texel( LLVMBuilderRef builder
,
239 const LLVMValueRef
*coords
,
240 LLVMValueRef lodbias
,
243 struct build_fetch_texel_context
*bld
= context
;
244 LLVMTypeRef vec_type
= LLVMTypeOf(coords
[0]);
245 LLVMValueRef args
[3];
248 if(!bld
->samplers_ptr
)
249 bld
->samplers_ptr
= lp_jit_context_samplers(builder
, bld
->context_ptr
);
252 bld
->store_ptr
= LLVMBuildArrayAlloca(builder
,
254 LLVMConstInt(LLVMInt32Type(), 4, 0),
257 for (i
= 0; i
< num_coords
; i
++) {
258 LLVMValueRef index
= LLVMConstInt(LLVMInt32Type(), i
, 0);
259 LLVMValueRef coord_ptr
= LLVMBuildGEP(builder
, bld
->store_ptr
, &index
, 1, "");
260 LLVMBuildStore(builder
, coords
[i
], coord_ptr
);
263 args
[0] = bld
->samplers_ptr
;
264 args
[1] = LLVMConstInt(LLVMInt32Type(), unit
, 0);
265 args
[2] = bld
->store_ptr
;
267 lp_build_intrinsic(builder
, "fetch_texel", LLVMVoidType(), args
, 3);
269 for (i
= 0; i
< NUM_CHANNELS
; ++i
) {
270 LLVMValueRef index
= LLVMConstInt(LLVMInt32Type(), i
, 0);
271 LLVMValueRef texel_ptr
= LLVMBuildGEP(builder
, bld
->store_ptr
, &index
, 1, "");
272 texel
[i
] = LLVMBuildLoad(builder
, texel_ptr
, "");
278 * Generate the fragment shader, depth/stencil test, and alpha tests.
281 generate_fs(struct llvmpipe_context
*lp
,
282 struct lp_fragment_shader
*shader
,
283 const struct lp_fragment_shader_variant_key
*key
,
284 LLVMBuilderRef builder
,
286 LLVMValueRef context_ptr
,
288 const struct lp_build_interp_soa_context
*interp
,
289 struct build_fetch_texel_context
*sampler
,
292 LLVMValueRef depth_ptr
)
294 const struct tgsi_token
*tokens
= shader
->base
.tokens
;
295 LLVMTypeRef elem_type
;
296 LLVMTypeRef vec_type
;
297 LLVMTypeRef int_vec_type
;
298 LLVMValueRef consts_ptr
;
299 LLVMValueRef outputs
[PIPE_MAX_SHADER_OUTPUTS
][NUM_CHANNELS
];
300 LLVMValueRef z
= interp
->pos
[2];
301 struct lp_build_mask_context mask
;
302 boolean early_depth_test
;
306 elem_type
= lp_build_elem_type(type
);
307 vec_type
= lp_build_vec_type(type
);
308 int_vec_type
= lp_build_int_vec_type(type
);
310 consts_ptr
= lp_jit_context_constants(builder
, context_ptr
);
312 lp_build_mask_begin(&mask
, builder
, type
, *pmask
);
315 lp
->depth_stencil
->depth
.enabled
&&
316 lp
->framebuffer
.zsbuf
&&
317 !lp
->depth_stencil
->alpha
.enabled
&&
318 !lp
->fs
->info
.uses_kill
&&
319 !lp
->fs
->info
.writes_z
;
322 generate_depth(lp
, builder
, &key
->depth
,
326 memset(outputs
, 0, sizeof outputs
);
328 lp_build_tgsi_soa(builder
, tokens
, type
, &mask
,
329 consts_ptr
, interp
->pos
, interp
->inputs
,
330 outputs
, emit_fetch_texel
, sampler
);
332 for (attrib
= 0; attrib
< shader
->info
.num_outputs
; ++attrib
) {
333 for(chan
= 0; chan
< NUM_CHANNELS
; ++chan
) {
334 if(outputs
[attrib
][chan
]) {
335 lp_build_name(outputs
[attrib
][chan
], "output%u.%u.%c", i
, attrib
, "xyzw"[chan
]);
337 switch (shader
->info
.output_semantic_name
[attrib
]) {
338 case TGSI_SEMANTIC_COLOR
:
340 unsigned cbuf
= shader
->info
.output_semantic_index
[attrib
];
342 lp_build_name(outputs
[attrib
][chan
], "color%u.%u.%c", i
, attrib
, "rgba"[chan
]);
345 /* XXX: should the alpha reference value be passed separately? */
346 if(cbuf
== 0 && chan
== 3) {
347 LLVMValueRef alpha
= outputs
[attrib
][chan
];
348 LLVMValueRef alpha_ref_value
;
349 alpha_ref_value
= lp_jit_context_alpha_ref_value(builder
, context_ptr
);
350 alpha_ref_value
= lp_build_broadcast(builder
, vec_type
, alpha_ref_value
);
351 lp_build_alpha_test(builder
, &key
->alpha
, type
,
352 &mask
, alpha
, alpha_ref_value
);
356 color
[chan
] = outputs
[attrib
][chan
];
361 case TGSI_SEMANTIC_POSITION
:
363 z
= outputs
[attrib
][chan
];
370 if(!early_depth_test
)
371 generate_depth(lp
, builder
, &key
->depth
,
375 lp_build_mask_end(&mask
);
383 * Generate color blending and color output.
386 generate_blend(const struct pipe_blend_state
*blend
,
387 LLVMBuilderRef builder
,
389 LLVMValueRef context_ptr
,
392 LLVMValueRef dst_ptr
)
394 struct lp_build_context bld
;
395 LLVMTypeRef vec_type
;
396 LLVMTypeRef int_vec_type
;
397 LLVMValueRef const_ptr
;
403 vec_type
= lp_build_vec_type(type
);
404 int_vec_type
= lp_build_int_vec_type(type
);
406 lp_build_context_init(&bld
, builder
, type
);
408 const_ptr
= lp_jit_context_blend_color(builder
, context_ptr
);
409 const_ptr
= LLVMBuildBitCast(builder
, const_ptr
,
410 LLVMPointerType(vec_type
, 0), "");
412 for(chan
= 0; chan
< 4; ++chan
) {
413 LLVMValueRef index
= LLVMConstInt(LLVMInt32Type(), chan
, 0);
414 con
[chan
] = LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, const_ptr
, &index
, 1, ""), "");
416 dst
[chan
] = LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, dst_ptr
, &index
, 1, ""), "");
418 lp_build_name(con
[chan
], "con.%c", "rgba"[chan
]);
419 lp_build_name(dst
[chan
], "dst.%c", "rgba"[chan
]);
422 lp_build_blend_soa(builder
, blend
, type
, src
, dst
, con
, res
);
424 for(chan
= 0; chan
< 4; ++chan
) {
425 LLVMValueRef index
= LLVMConstInt(LLVMInt32Type(), chan
, 0);
426 lp_build_name(res
[chan
], "res.%c", "rgba"[chan
]);
427 res
[chan
] = lp_build_select(&bld
, mask
, res
[chan
], dst
[chan
]);
428 LLVMBuildStore(builder
, res
[chan
], LLVMBuildGEP(builder
, dst_ptr
, &index
, 1, ""));
434 * Generate the runtime callable function for the whole fragment pipeline.
436 static struct lp_fragment_shader_variant
*
437 generate_fragment(struct llvmpipe_context
*lp
,
438 struct lp_fragment_shader
*shader
,
439 const struct lp_fragment_shader_variant_key
*key
)
441 struct llvmpipe_screen
*screen
= llvmpipe_screen(lp
->pipe
.screen
);
442 struct lp_fragment_shader_variant
*variant
;
443 union lp_type fs_type
;
444 union lp_type blend_type
;
445 LLVMTypeRef fs_elem_type
;
446 LLVMTypeRef fs_vec_type
;
447 LLVMTypeRef fs_int_vec_type
;
448 LLVMTypeRef blend_vec_type
;
449 LLVMTypeRef blend_int_vec_type
;
450 LLVMTypeRef arg_types
[9];
451 LLVMTypeRef func_type
;
452 LLVMValueRef context_ptr
;
456 LLVMValueRef dadx_ptr
;
457 LLVMValueRef dady_ptr
;
458 LLVMValueRef mask_ptr
;
459 LLVMValueRef color_ptr
;
460 LLVMValueRef depth_ptr
;
461 LLVMBasicBlockRef block
;
462 LLVMBuilderRef builder
;
465 struct build_fetch_texel_context sampler
;
466 struct lp_build_interp_soa_context interp
;
467 LLVMValueRef fs_mask
[LP_MAX_VECTOR_LENGTH
];
468 LLVMValueRef fs_out_color
[NUM_CHANNELS
][LP_MAX_VECTOR_LENGTH
];
469 LLVMValueRef blend_mask
;
470 LLVMValueRef blend_in_color
[NUM_CHANNELS
];
476 tgsi_dump(shader
->base
.tokens
, 0);
477 if(key
->depth
.enabled
) {
478 debug_printf("depth.func = %s\n", debug_dump_func(key
->depth
.func
, TRUE
));
479 debug_printf("depth.writemask = %u\n", key
->depth
.writemask
);
480 debug_printf("depth.occlusion_count = %u\n", key
->depth
.occlusion_count
);
482 if(key
->alpha
.enabled
) {
483 debug_printf("alpha.func = %s\n", debug_dump_func(key
->alpha
.func
, TRUE
));
484 debug_printf("alpha.ref_value = %f\n", key
->alpha
.ref_value
);
486 if(key
->blend
.logicop_enable
) {
487 debug_printf("blend.logicop_func = %u\n", key
->blend
.logicop_func
);
489 else if(key
->blend
.blend_enable
) {
490 debug_printf("blend.rgb_func = %s\n", debug_dump_blend_func (key
->blend
.rgb_func
, TRUE
));
491 debug_printf("rgb_src_factor = %s\n", debug_dump_blend_factor(key
->blend
.rgb_src_factor
, TRUE
));
492 debug_printf("rgb_dst_factor = %s\n", debug_dump_blend_factor(key
->blend
.rgb_dst_factor
, TRUE
));
493 debug_printf("alpha_func = %s\n", debug_dump_blend_func (key
->blend
.alpha_func
, TRUE
));
494 debug_printf("alpha_src_factor = %s\n", debug_dump_blend_factor(key
->blend
.alpha_src_factor
, TRUE
));
495 debug_printf("alpha_dst_factor = %s\n", debug_dump_blend_factor(key
->blend
.alpha_dst_factor
, TRUE
));
497 debug_printf("blend.colormask = 0x%x\n", key
->blend
.colormask
);
500 variant
= CALLOC_STRUCT(lp_fragment_shader_variant
);
504 variant
->shader
= shader
;
505 memcpy(&variant
->key
, key
, sizeof *key
);
507 /* TODO: actually pick these based on the fs and color buffer
508 * characteristics. */
511 fs_type
.floating
= TRUE
; /* floating point values */
512 fs_type
.sign
= TRUE
; /* values are signed */
513 fs_type
.norm
= FALSE
; /* values are not limited to [0,1] or [-1,1] */
514 fs_type
.width
= 32; /* 32-bit float */
515 fs_type
.length
= 4; /* 4 element per vector */
518 blend_type
.value
= 0;
519 blend_type
.floating
= FALSE
; /* values are integers */
520 blend_type
.sign
= FALSE
; /* values are unsigned */
521 blend_type
.norm
= TRUE
; /* values are in [0,1] or [-1,1] */
522 blend_type
.width
= 8; /* 8-bit ubyte values */
523 blend_type
.length
= 16; /* 16 elements per vector */
526 * Generate the function prototype. Any change here must be reflected in
527 * lp_jit.h's lp_jit_frag_func function pointer type, and vice-versa.
530 fs_elem_type
= lp_build_elem_type(fs_type
);
531 fs_vec_type
= lp_build_vec_type(fs_type
);
532 fs_int_vec_type
= lp_build_int_vec_type(fs_type
);
534 blend_vec_type
= lp_build_vec_type(blend_type
);
535 blend_int_vec_type
= lp_build_int_vec_type(blend_type
);
537 arg_types
[0] = screen
->context_ptr_type
; /* context */
538 arg_types
[1] = LLVMInt32Type(); /* x */
539 arg_types
[2] = LLVMInt32Type(); /* y */
540 arg_types
[3] = LLVMPointerType(fs_elem_type
, 0); /* a0 */
541 arg_types
[4] = LLVMPointerType(fs_elem_type
, 0); /* dadx */
542 arg_types
[5] = LLVMPointerType(fs_elem_type
, 0); /* dady */
543 arg_types
[6] = LLVMPointerType(fs_int_vec_type
, 0); /* mask */
544 arg_types
[7] = LLVMPointerType(blend_vec_type
, 0); /* color */
545 arg_types
[8] = LLVMPointerType(fs_int_vec_type
, 0); /* depth */
547 func_type
= LLVMFunctionType(LLVMVoidType(), arg_types
, Elements(arg_types
), 0);
549 variant
->function
= LLVMAddFunction(screen
->module
, "shader", func_type
);
550 LLVMSetFunctionCallConv(variant
->function
, LLVMCCallConv
);
551 for(i
= 0; i
< Elements(arg_types
); ++i
)
552 if(LLVMGetTypeKind(arg_types
[i
]) == LLVMPointerTypeKind
)
553 LLVMAddAttribute(LLVMGetParam(variant
->function
, i
), LLVMNoAliasAttribute
);
555 context_ptr
= LLVMGetParam(variant
->function
, 0);
556 x
= LLVMGetParam(variant
->function
, 1);
557 y
= LLVMGetParam(variant
->function
, 2);
558 a0_ptr
= LLVMGetParam(variant
->function
, 3);
559 dadx_ptr
= LLVMGetParam(variant
->function
, 4);
560 dady_ptr
= LLVMGetParam(variant
->function
, 5);
561 mask_ptr
= LLVMGetParam(variant
->function
, 6);
562 color_ptr
= LLVMGetParam(variant
->function
, 7);
563 depth_ptr
= LLVMGetParam(variant
->function
, 8);
565 lp_build_name(context_ptr
, "context");
566 lp_build_name(x
, "x");
567 lp_build_name(y
, "y");
568 lp_build_name(a0_ptr
, "a0");
569 lp_build_name(dadx_ptr
, "dadx");
570 lp_build_name(dady_ptr
, "dady");
571 lp_build_name(mask_ptr
, "mask");
572 lp_build_name(color_ptr
, "color");
573 lp_build_name(depth_ptr
, "depth");
579 block
= LLVMAppendBasicBlock(variant
->function
, "entry");
580 builder
= LLVMCreateBuilder();
581 LLVMPositionBuilderAtEnd(builder
, block
);
583 generate_pos0(builder
, x
, y
, &x0
, &y0
);
585 lp_build_interp_soa_init(&interp
, shader
->base
.tokens
, builder
, fs_type
,
586 a0_ptr
, dadx_ptr
, dady_ptr
,
589 memset(&sampler
, 0, sizeof sampler
);
590 sampler
.context_ptr
= context_ptr
;
592 for(i
= 0; i
< num_fs
; ++i
) {
593 LLVMValueRef index
= LLVMConstInt(LLVMInt32Type(), i
, 0);
594 LLVMValueRef out_color
[NUM_CHANNELS
];
595 LLVMValueRef depth_ptr_i
;
598 lp_build_interp_soa_update(&interp
);
600 fs_mask
[i
] = LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, mask_ptr
, &index
, 1, ""), "");
601 depth_ptr_i
= LLVMBuildGEP(builder
, depth_ptr
, &index
, 1, "");
603 generate_fs(lp
, shader
, key
,
614 for(chan
= 0; chan
< NUM_CHANNELS
; ++chan
)
615 fs_out_color
[chan
][i
] = out_color
[chan
];
619 * Convert the fs's output color and mask to fit to the blending type.
622 for(chan
= 0; chan
< NUM_CHANNELS
; ++chan
) {
623 lp_build_conv(builder
, fs_type
, blend_type
,
624 fs_out_color
[chan
], num_fs
,
625 &blend_in_color
[chan
], 1);
626 lp_build_name(blend_in_color
[chan
], "color.%c", "rgba"[chan
]);
630 lp_build_conv_mask(builder
, fs_type
, blend_type
,
638 generate_blend(&key
->blend
,
646 LLVMBuildRetVoid(builder
);
648 LLVMDisposeBuilder(builder
);
651 * Translate the LLVM IR into machine code.
654 LLVMRunFunctionPassManager(screen
->pass
, variant
->function
);
657 LLVMDumpValue(variant
->function
);
661 if(LLVMVerifyFunction(variant
->function
, LLVMPrintMessageAction
)) {
662 LLVMDumpValue(variant
->function
);
666 variant
->jit_function
= (lp_jit_frag_func
)LLVMGetPointerToGlobal(screen
->engine
, variant
->function
);
669 lp_disassemble(variant
->jit_function
);
672 variant
->next
= shader
->variants
;
673 shader
->variants
= variant
;
680 llvmpipe_create_fs_state(struct pipe_context
*pipe
,
681 const struct pipe_shader_state
*templ
)
683 struct lp_fragment_shader
*shader
;
685 shader
= CALLOC_STRUCT(lp_fragment_shader
);
689 /* get/save the summary info for this shader */
690 tgsi_scan_shader(templ
->tokens
, &shader
->info
);
692 /* we need to keep a local copy of the tokens */
693 shader
->base
.tokens
= tgsi_dup_tokens(templ
->tokens
);
700 llvmpipe_bind_fs_state(struct pipe_context
*pipe
, void *fs
)
702 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
704 llvmpipe
->fs
= (struct lp_fragment_shader
*) fs
;
706 llvmpipe
->dirty
|= LP_NEW_FS
;
711 llvmpipe_delete_fs_state(struct pipe_context
*pipe
, void *fs
)
713 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
714 struct llvmpipe_screen
*screen
= llvmpipe_screen(pipe
->screen
);
715 struct lp_fragment_shader
*shader
= fs
;
716 struct lp_fragment_shader_variant
*variant
;
718 assert(fs
!= llvmpipe
->fs
);
720 variant
= shader
->variants
;
722 struct lp_fragment_shader_variant
*next
= variant
->next
;
724 if(variant
->function
) {
725 if(variant
->jit_function
)
726 LLVMFreeMachineCodeForFunction(screen
->engine
, variant
->function
);
727 LLVMDeleteFunction(variant
->function
);
735 FREE((void *) shader
->base
.tokens
);
742 llvmpipe_set_constant_buffer(struct pipe_context
*pipe
,
743 uint shader
, uint index
,
744 const struct pipe_constant_buffer
*buf
)
746 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
748 assert(shader
< PIPE_SHADER_TYPES
);
751 /* note: reference counting */
752 pipe_buffer_reference(&llvmpipe
->constants
[shader
].buffer
,
753 buf
? buf
->buffer
: NULL
);
755 llvmpipe
->dirty
|= LP_NEW_CONSTANTS
;
760 * We need to generate several variants of the fragment pipeline to match
761 * all the combinations of the contributing state atoms.
763 * TODO: there is actually no reason to tie this to context state -- the
764 * generated code could be cached globally in the screen.
767 make_variant_key(struct llvmpipe_context
*lp
,
768 struct lp_fragment_shader_variant_key
*key
)
770 memset(key
, 0, sizeof *key
);
772 memcpy(&key
->depth
, &lp
->depth_stencil
->depth
, sizeof key
->depth
);
774 key
->alpha
.enabled
= lp
->depth_stencil
->alpha
.enabled
;
775 if(key
->alpha
.enabled
)
776 key
->alpha
.func
= lp
->depth_stencil
->alpha
.func
;
777 /* alpha.ref_value is passed in jit_context */
779 memcpy(&key
->blend
, lp
->blend
, sizeof key
->blend
);
784 llvmpipe_update_fs(struct llvmpipe_context
*lp
)
786 struct lp_fragment_shader
*shader
= lp
->fs
;
787 struct lp_fragment_shader_variant_key key
;
788 struct lp_fragment_shader_variant
*variant
;
790 make_variant_key(lp
, &key
);
792 variant
= shader
->variants
;
794 if(memcmp(&variant
->key
, &key
, sizeof key
) == 0)
797 variant
= variant
->next
;
801 variant
= generate_fragment(lp
, shader
, &key
);
803 shader
->current
= variant
;