1 /*
2 * Copyright 2014, 2015 Red Hat.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * on the rights to use, copy, modify, merge, publish, distribute, sub
8 * license, and/or sell copies of the Software, and to permit persons to whom
9 * the Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
21 * USE OR OTHER DEALINGS IN THE SOFTWARE.
22 */
23
24 /* the virgl hw tgsi vs what the current gallium want will diverge over time.
25 so add a transform stage to remove things we don't want to send unless
26 the receiver supports it.
27 */
28 #include "tgsi/tgsi_transform.h"
29 #include "virgl_context.h"
30 struct virgl_transform_context {
31 struct tgsi_transform_context base;
32 };
33
34 static void
virgl_tgsi_transform_declaration(struct tgsi_transform_context * ctx,struct tgsi_full_declaration * decl)35 virgl_tgsi_transform_declaration(struct tgsi_transform_context *ctx,
36 struct tgsi_full_declaration *decl)
37 {
38 switch (decl->Declaration.File) {
39 case TGSI_FILE_CONSTANT:
40 if (decl->Declaration.Dimension) {
41 if (decl->Dim.Index2D == 0)
42 decl->Declaration.Dimension = 0;
43 }
44 break;
45 default:
46 break;
47 }
48 ctx->emit_declaration(ctx, decl);
49
50 }
51
52 /* for now just strip out the new properties the remote doesn't understand
53 yet */
54 static void
virgl_tgsi_transform_property(struct tgsi_transform_context * ctx,struct tgsi_full_property * prop)55 virgl_tgsi_transform_property(struct tgsi_transform_context *ctx,
56 struct tgsi_full_property *prop)
57 {
58 switch (prop->Property.PropertyName) {
59 case TGSI_PROPERTY_NUM_CLIPDIST_ENABLED:
60 case TGSI_PROPERTY_NUM_CULLDIST_ENABLED:
61 case TGSI_PROPERTY_NEXT_SHADER:
62 break;
63 default:
64 ctx->emit_property(ctx, prop);
65 break;
66 }
67 }
68
69 static void
virgl_tgsi_transform_instruction(struct tgsi_transform_context * ctx,struct tgsi_full_instruction * inst)70 virgl_tgsi_transform_instruction(struct tgsi_transform_context *ctx,
71 struct tgsi_full_instruction *inst)
72 {
73 if (inst->Instruction.Precise)
74 inst->Instruction.Precise = 0;
75
76 for (unsigned i = 0; i < inst->Instruction.NumSrcRegs; i++) {
77 if (inst->Src[i].Register.File == TGSI_FILE_CONSTANT &&
78 inst->Src[i].Register.Dimension &&
79 inst->Src[i].Dimension.Index == 0)
80 inst->Src[i].Register.Dimension = 0;
81 }
82 ctx->emit_instruction(ctx, inst);
83 }
84
virgl_tgsi_transform(const struct tgsi_token * tokens_in)85 struct tgsi_token *virgl_tgsi_transform(const struct tgsi_token *tokens_in)
86 {
87
88 struct virgl_transform_context transform;
89 const uint newLen = tgsi_num_tokens(tokens_in);
90 struct tgsi_token *new_tokens;
91
92 new_tokens = tgsi_alloc_tokens(newLen);
93 if (!new_tokens)
94 return NULL;
95
96 memset(&transform, 0, sizeof(transform));
97 transform.base.transform_declaration = virgl_tgsi_transform_declaration;
98 transform.base.transform_property = virgl_tgsi_transform_property;
99 transform.base.transform_instruction = virgl_tgsi_transform_instruction;
100 tgsi_transform_shader(tokens_in, new_tokens, newLen, &transform.base);
101
102 return new_tokens;
103 }
104