1 /**************************************************************************
2 *
3 * Copyright (C) 2018 Collabora Ltd
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included
13 * in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
22 *
23 **************************************************************************/
24
25 #include <string.h>
26 #include <stdlib.h>
27 #include "vrend_tweaks.h"
28 #include "vrend_debug.h"
29 #include "virgl_protocol.h"
30
get_tf3_samples_passed_factor(struct vrend_context_tweaks * ctx,void * params)31 inline static void get_tf3_samples_passed_factor(struct vrend_context_tweaks *ctx, void *params)
32 {
33 *(uint32_t *)params = ctx->tf3_samples_passed_factor;
34 }
35
vrend_get_tweak_is_active_with_params(struct vrend_context_tweaks * ctx,enum vrend_tweak_type t,void * params)36 bool vrend_get_tweak_is_active_with_params(struct vrend_context_tweaks *ctx, enum vrend_tweak_type t, void *params)
37 {
38 if (!(ctx->active_tweaks & (1u << t)))
39 return false;
40
41 switch (t) {
42 case virgl_tweak_gles_tf3_samples_passes_multiplier:
43 get_tf3_samples_passed_factor(ctx, params); break;
44 default:
45 ;
46 }
47
48 return true;
49 }
50
vrend_get_tweak_is_active(struct vrend_context_tweaks * ctx,enum vrend_tweak_type t)51 bool vrend_get_tweak_is_active(struct vrend_context_tweaks *ctx, enum vrend_tweak_type t)
52 {
53 return (ctx->active_tweaks & (1u << t)) ? true : false;
54 }
55
56 const char *tweak_debug_table[] = {
57 [virgl_tweak_gles_brga_emulate] =
58 "GLES: Skip linearization in blits to BGRA_UNORM surfaces",
59
60 [virgl_tweak_gles_brga_apply_dest_swizzle] =
61 "GLES: Apply dest swizzle when a BGRA surface is emulated by an RGBA surface",
62
63 [virgl_tweak_gles_tf3_samples_passes_multiplier] =
64 "GLES: Value to return when emulating GL_SAMPLES_PASSES by using GL_ANY_SAMPLES_PASSES",
65
66 [virgl_tweak_undefined] = "Undefined tweak"
67 };
68
set_tweak_and_params(struct vrend_context_tweaks * ctx,enum vrend_tweak_type t,uint32_t value)69 static void set_tweak_and_params(struct vrend_context_tweaks *ctx,
70 enum vrend_tweak_type t, uint32_t value)
71 {
72 ctx->active_tweaks |= 1u << t;
73
74 switch (t) {
75 case virgl_tweak_gles_tf3_samples_passes_multiplier:
76 ctx->tf3_samples_passed_factor = value;
77 break;
78 default:
79 ;
80 }
81 }
82
set_tweak_and_params_from_string(struct vrend_context_tweaks * ctx,enum vrend_tweak_type t,const char * value)83 static void set_tweak_and_params_from_string(struct vrend_context_tweaks *ctx,
84 enum vrend_tweak_type t, const char *value)
85 {
86 ctx->active_tweaks |= 1u << t;
87
88 switch (t) {
89 case virgl_tweak_gles_tf3_samples_passes_multiplier:
90 ctx->tf3_samples_passed_factor = value ? atoi(value) : 2048;
91 break;
92 default:
93 ;
94 }
95 }
96
97 /* we expect a string like tweak1:value,tweak2:value */
vrend_set_active_tweaks(struct vrend_context_tweaks * ctx,uint32_t tweak_id,uint32_t value)98 void vrend_set_active_tweaks(struct vrend_context_tweaks *ctx, uint32_t tweak_id, uint32_t value)
99 {
100 if (tweak_id < virgl_tweak_undefined) {
101 VREND_DEBUG(dbg_tweak, NULL, "Apply tweak '%s' = %u\n", tweak_debug_table[tweak_id], value);
102 set_tweak_and_params(ctx, tweak_id, value);
103 } else {
104 VREND_DEBUG(dbg_tweak, NULL, "Unknown tweak %d = %d sent\n", tweak_id, value);
105 }
106 }
107
108 struct {
109 enum vrend_tweak_type flag;
110 const char *name;
111 const char *descr;
112 } tweak_table [] = {
113 { virgl_tweak_gles_brga_emulate, "emu-bgra",
114 "Emulate BGRA_UNORM and BGRA_SRB by using swizzled RGBA formats" },
115
116 { virgl_tweak_gles_brga_apply_dest_swizzle, "bgra-dest-swz",
117 "Apply the destination swizzle of emulated BGRA surfaces in blits"},
118
119 { virgl_tweak_gles_tf3_samples_passes_multiplier, "samples-passed",
120 "Return this value when GL_SAMPLES_PASSED is emulated by GL_ANY_SAMPLES_PASSED"},
121
122 { virgl_tweak_undefined, NULL, NULL}
123 };
124
125
vrend_set_tweak_from_env(struct vrend_context_tweaks * ctx)126 void vrend_set_tweak_from_env(struct vrend_context_tweaks *ctx)
127 {
128 char *tweaks = getenv("VREND_TWEAK");
129 if (tweaks) {
130 VREND_DEBUG(dbg_tweak, NULL, "ENV tweaks %s\n", tweaks);
131
132 char *saveptr;
133 char *tweak_descr_copy = strdup(tweaks);
134
135 char *tweak = strtok_r(tweak_descr_copy, ":", &saveptr);
136 while (tweak) {
137 char *tweak_param = strtok_r(NULL, ",", &saveptr);
138
139 for (int i = 0; i < virgl_tweak_undefined; ++i) {
140 if (!strcmp(tweak, tweak_table[i].name)) {
141 VREND_DEBUG(dbg_tweak, NULL, "Apply tweak %s=%s\n", tweak, tweak_param);
142 set_tweak_and_params_from_string(ctx, tweak_table[i].flag, tweak_param);
143 }
144 }
145 tweak = strtok_r(NULL, ":", &saveptr);
146 }
147 free(tweak_descr_copy);
148 }
149 }
150