src/vulkan/overlay-layer/overlay_params.c

   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
  30 static enum overlay_param_position
  31 parse_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
  44 static bool
  45 parse_help(const char *str)
  46 {
  47    fprintf(stderr, "Layer params using VK_LAYER_MESA_OVERLAY_CONFIG=\n");
  48 #define OVERLAY_PARAM_BOOL(name)                \
  49    fprintf(stderr, "\t%s=0/1\n", #name);
  50 #define OVERLAY_PARAM_CUSTOM(name)
  51    OVERLAY_PARAMS
  52 #undef OVERLAY_PARAM_BOOL
  53 #undef OVERLAY_PARAM_CUSTOM
  54    fprintf(stderr, "\tposition=\n"
  55            "\t\ttop-left\n"
  56            "\t\ttop-right\n"
  57            "\t\tbottom-left\n"
  58            "\t\tbottom-right\n");
  59
  60    return true;
  61 }
  62
  63 static bool is_delimiter(char c)
  64 {
  65    return c == 0 || c == ',' || c == ':' || c == ';' || c == '=';
  66 }
  67
  68 static int
  69 parse_string(const char *s, char *out_param, char *out_value)
  70 {
  71    int i = 0;
  72
  73    for (; !is_delimiter(*s); s++, out_param++, i++)
  74       *out_param = *s;
  75
  76    *out_param = 0;
  77
  78    if (*s == '=') {
  79       s++;
  80       i++;
  81       for (; !is_delimiter(*s); s++, out_value++, i++)
  82          *out_value = *s;
  83    }
  84    *out_value = 0;
  85
  86    if (*s && is_delimiter(*s)) {
  87       s++;
  88       i++;
  89    }
  90
  91    if (*s && !i) {
  92       fprintf(stderr, "mesa-overlay: syntax error: unexpected '%c' (%i) while "
  93               "parsing a string\n", *s, *s);
  94       fflush(stderr);
  95    }
  96
  97    return i;
  98 }
  99
 100 const char *overlay_param_names[] = {
 101 #define OVERLAY_PARAM_BOOL(name) #name,
 102 #define OVERLAY_PARAM_CUSTOM(name)
 103    OVERLAY_PARAMS
 104 #undef OVERLAY_PARAM_BOOL
 105 #undef OVERLAY_PARAM_CUSTOM
 106 };
 107
 108 void
 109 parse_overlay_env(struct overlay_params *params,
 110                   const char *env)
 111 {
 112    uint32_t num;
 113    char key[256], value[256];
 114
 115    memset(params, 0, sizeof(*params));
 116
 117    /* Visible by default */
 118    params->enabled[OVERLAY_PARAM_ENABLED_fps] = true;
 119    params->enabled[OVERLAY_PARAM_ENABLED_frame_timing] = true;
 120
 121    if (!env)
 122       return;
 123
 124    while ((num = parse_string(env, key, value)) != 0) {
 125       env += num;
 126
 127 #define OVERLAY_PARAM_BOOL(name)                                        \
 128       if (!strcmp(#name, key)) {                                        \
 129          params->enabled[OVERLAY_PARAM_ENABLED_##name] = strtol(value, NULL, 0); \
 130          continue;                                                      \
 131       }
 132 #define OVERLAY_PARAM_CUSTOM(name)              \
 133       if (!strcmp(#name, key)) {                \
 134          params->name = parse_##name(value);     \
 135          continue;                               \
 136       }
 137       OVERLAY_PARAMS
 138 #undef OVERLAY_PARAM_BOOL
 139 #undef OVERLAY_PARAM_CUSTOM
 140       fprintf(stderr, "Unknown option '%s'\n", key);
 141    }
 142 }