1/*
2 * Copyright © 2019 Intel Corporation
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 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24#include <stdio.h>
25#include <string.h>
26#include <stdlib.h>
27
28#include "overlay_params.h"
29
30static enum overlay_param_position
31parse_position(const char *str)
32{
33   if (!str || !strcmp(str, "top-left"))
34      return LAYER_POSITION_TOP_LEFT;
35   if (!strcmp(str, "top-right"))
36      return LAYER_POSITION_TOP_RIGHT;
37   if (!strcmp(str, "bottom-left"))
38      return LAYER_POSITION_BOTTOM_LEFT;
39   if (!strcmp(str, "bottom-right"))
40      return LAYER_POSITION_BOTTOM_RIGHT;
41   return LAYER_POSITION_TOP_LEFT;
42}
43
44static FILE *
45parse_output_file(const char *str)
46{
47   return fopen(str, "w+");
48}
49
50static uint32_t
51parse_fps_sampling_period(const char *str)
52{
53   return strtol(str, NULL, 0) * 1000;
54}
55
56static bool
57parse_no_display(const char *str)
58{
59   return strtol(str, NULL, 0) != 0;
60}
61
62static unsigned
63parse_unsigned(const char *str)
64{
65   return strtol(str, NULL, 0);
66}
67
68#define parse_width(s) parse_unsigned(s)
69#define parse_height(s) parse_unsigned(s)
70
71static bool
72parse_help(const char *str)
73{
74   fprintf(stderr, "Layer params using VK_LAYER_MESA_OVERLAY_CONFIG=\n");
75#define OVERLAY_PARAM_BOOL(name)                \
76   fprintf(stderr, "\t%s=0|1\n", #name);
77#define OVERLAY_PARAM_CUSTOM(name)
78   OVERLAY_PARAMS
79#undef OVERLAY_PARAM_BOOL
80#undef OVERLAY_PARAM_CUSTOM
81   fprintf(stderr, "\tposition=top-left|top-right|bottom-left|bottom-right\n");
82   fprintf(stderr, "\tfps_sampling_period=number-of-milliseconds\n");
83   fprintf(stderr, "\tno_display=0|1\n");
84   fprintf(stderr, "\toutput_file=/path/to/output.txt\n");
85   fprintf(stderr, "\twidth=width-in-pixels\n");
86   fprintf(stderr, "\theight=height-in-pixels\n");
87
88   return true;
89}
90
91static bool is_delimiter(char c)
92{
93   return c == 0 || c == ',' || c == ':' || c == ';' || c == '=';
94}
95
96static int
97parse_string(const char *s, char *out_param, char *out_value)
98{
99   int i = 0;
100
101   for (; !is_delimiter(*s); s++, out_param++, i++)
102      *out_param = *s;
103
104   *out_param = 0;
105
106   if (*s == '=') {
107      s++;
108      i++;
109      for (; !is_delimiter(*s); s++, out_value++, i++)
110         *out_value = *s;
111   } else
112      *(out_value++) = '1';
113   *out_value = 0;
114
115   if (*s && is_delimiter(*s)) {
116      s++;
117      i++;
118   }
119
120   if (*s && !i) {
121      fprintf(stderr, "mesa-overlay: syntax error: unexpected '%c' (%i) while "
122              "parsing a string\n", *s, *s);
123      fflush(stderr);
124   }
125
126   return i;
127}
128
129const char *overlay_param_names[] = {
130#define OVERLAY_PARAM_BOOL(name) #name,
131#define OVERLAY_PARAM_CUSTOM(name)
132   OVERLAY_PARAMS
133#undef OVERLAY_PARAM_BOOL
134#undef OVERLAY_PARAM_CUSTOM
135};
136
137void
138parse_overlay_env(struct overlay_params *params,
139                  const char *env)
140{
141   uint32_t num;
142   char key[256], value[256];
143
144   memset(params, 0, sizeof(*params));
145
146   /* Visible by default */
147   params->enabled[OVERLAY_PARAM_ENABLED_fps] = true;
148   params->enabled[OVERLAY_PARAM_ENABLED_frame_timing] = true;
149   params->fps_sampling_period = 500000; /* 500ms */
150   params->width = params->height = 300;
151
152   if (!env)
153      return;
154
155   while ((num = parse_string(env, key, value)) != 0) {
156      env += num;
157
158#define OVERLAY_PARAM_BOOL(name)                                        \
159      if (!strcmp(#name, key)) {                                        \
160         params->enabled[OVERLAY_PARAM_ENABLED_##name] =                \
161            strtol(value, NULL, 0);                                     \
162         continue;                                                      \
163      }
164#define OVERLAY_PARAM_CUSTOM(name)               \
165      if (!strcmp(#name, key)) {                 \
166         params->name = parse_##name(value);     \
167         continue;                               \
168      }
169      OVERLAY_PARAMS
170#undef OVERLAY_PARAM_BOOL
171#undef OVERLAY_PARAM_CUSTOM
172      fprintf(stderr, "Unknown option '%s'\n", key);
173   }
174}
175