| Index: tools/flags/SkCommonFlagsConfig.cpp | 
| diff --git a/tools/flags/SkCommonFlagsConfig.cpp b/tools/flags/SkCommonFlagsConfig.cpp | 
| index 16ac114cfcae4fc1adeea43cc22eebe1c2cc077d..381f9c50f220c6cf6edfaaa0b160f60aa7299656 100644 | 
| --- a/tools/flags/SkCommonFlagsConfig.cpp | 
| +++ b/tools/flags/SkCommonFlagsConfig.cpp | 
| @@ -26,37 +26,88 @@ static const char defaultConfigs[] = | 
| #endif | 
| ; | 
|  | 
| -static const char configHelp[] = | 
| -    "Options: 565 8888 debug gpu gl gpudebug gpudft gpunull " | 
| -    "msaa16 msaa4 glmsaa4 gpuf16 gpusrgb glsrgb glwide nonrendering null nullgpu " | 
| -    "nvpr16 nvpr4 nvprdit16 nvprdit4 glnvpr4 glnvprdit4 pdf skp svg xps " | 
| -    "glinst glinst4 glinstdit4 glinst16 glinstdit16 esinst esinst4 esinsdit4" | 
| +static const struct { | 
| +    const char* predefinedConfig; | 
| +    const char* backend; | 
| +    const char* options; | 
| +} gPredefinedConfigs[] ={ | 
| +#if SK_SUPPORT_GPU | 
| +    { "gpu",         "gpu", "" }, | 
| +    { "gl",          "gpu", "api=gl" }, | 
| +    { "msaa4",       "gpu", "samples=4" }, | 
| +    { "glmsaa4",     "gpu", "api=gl,samples=4" }, | 
| +    { "msaa16",      "gpu", "samples=16" }, | 
| +    { "nvpr4",       "gpu", "nvpr=true,samples=4" }, | 
| +    { "glnvpr4",     "gpu", "api=gl,nvpr=true,samples=4" }, | 
| +    { "nvpr16",      "gpu", "nvpr=true,samples=16" }, | 
| +    { "nvprdit4",    "gpu", "nvpr=true,samples=4,dit=true" }, | 
| +    { "glnvprdit4",  "gpu", "api=gl,nvpr=true,samples=4,dit=true" }, | 
| +    { "nvprdit16",   "gpu", "nvpr=true,samples=16,dit=true" }, | 
| +    { "glinst",      "gpu", "api=gl,inst=true" }, | 
| +    { "glinst4",     "gpu", "api=gl,inst=true,samples=4" }, | 
| +    { "glinstdit4",  "gpu", "api=gl,inst=true,samples=4,dit=true" }, | 
| +    { "glinst16",    "gpu", "api=gl,inst=true,samples=16" }, | 
| +    { "glinstdit16", "gpu", "api=gl,inst=true,samples=16,dit=true" }, | 
| +    { "esinst",      "gpu", "api=gles,inst=true" }, | 
| +    { "esinst4",     "gpu", "api=gles,inst=true,samples=4" }, | 
| +    { "esinstdit4",  "gpu", "api=gles,inst=true,samples=4,dit=true" }, | 
| +    { "gpuf16",      "gpu", "color=f16" }, | 
| +    { "gpusrgb",     "gpu", "color=srgb" }, | 
| +    { "glsrgb",      "gpu", "api=gl,color=srgb" }, | 
| +    { "glwide",      "gpu", "api=gl,color=f16_wide" }, | 
| +    { "gpudft",      "gpu", "dit=true" }, | 
| +    { "gpudebug",    "gpu", "api=debug" }, | 
| +    { "gpunull",     "gpu", "api=null" }, | 
| +    { "debug",       "gpu", "api=debug" }, | 
| +    { "nullgpu",     "gpu", "api=null" } | 
| #if SK_ANGLE | 
| #ifdef SK_BUILD_FOR_WIN | 
| -    " angle" | 
| +    ,{ "angle",      "gpu", "api=angle" } | 
| #endif | 
| -    " angle-gl" | 
| +    ,{ "angle-gl",   "gpu", "api=angle-gl" } | 
| #endif | 
| #if SK_COMMAND_BUFFER | 
| -    " commandbuffer" | 
| +    ,{ "commandbuffer", "gpu", "api=commandbuffer" } | 
| #endif | 
| #if SK_MESA | 
| -    " mesa" | 
| +    ,{ "mesa", "gpu", "api=mesa" } | 
| +#endif | 
| +#ifdef SK_VULKAN | 
| +    ,{ "vk",       "gpu", "api=vulkan" } | 
| +    ,{ "vksrgb",   "gpu", "api=vulkan,color=srgb" } | 
| +    ,{ "vkwide",   "gpu", "api=vulkan,color=f16_wide" } | 
| +    ,{ "vkmsaa4",  "gpu", "api=vulkan,samples=4" } | 
| +    ,{ "vkmsaa16", "gpu", "api=vulkan,samples=16" } | 
| #endif | 
| + | 
| +#else | 
| +{ "", "", "" } | 
| +#endif | 
| +}; | 
| + | 
| +static const char configHelp[] = | 
| +    "Options: 565 8888 srgb f16 nonrendering null pdf pdfa skp pipe svg xps" | 
| #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK | 
| " hwui" | 
| #endif | 
| -#ifdef SK_VULKAN | 
| -    " vk vksrgb vkwide" | 
| -#endif | 
| -    " or use extended form 'backend(option=value,...)'.\n"; | 
| +    ; | 
| + | 
| +static const char* config_help_fn() { | 
| +    static SkString helpString; | 
| +    helpString.set(configHelp); | 
| +    for (const auto& config : gPredefinedConfigs) { | 
| +        helpString.appendf(" %s", config.predefinedConfig); | 
| +    } | 
| +    helpString.append(" or use extended form 'backend(option=value,...)'.\n"); | 
| +    return helpString.c_str(); | 
| +} | 
|  | 
| static const char configExtendedHelp[] = | 
| "Extended form: 'backend(option=value,...)'\n\n" | 
| "Possible backends and options:\n" | 
| #if SK_SUPPORT_GPU | 
| "\n" | 
| -    "gpu(api=string,color=string,dit=bool,nvpr=bool,inst=bool,samples=int)\tGPU backend\n" | 
| +    "gpu(api=string,color=string,dit=bool,nvpr=bool,inst=bool,samples=int)\n" | 
| "\tapi\ttype: string\tdefault: native.\n" | 
| "\t    Select graphics API to use with gpu backend.\n" | 
| "\t    Options:\n" | 
| @@ -99,108 +150,20 @@ static const char configExtendedHelp[] = | 
| "\t    Use multisampling with N samples.\n" | 
| "\n" | 
| "Predefined configs:\n\n" | 
| -    "\tgpu       \t= gpu()\n" | 
| -    "\tgl        \t= gpu(api=gl)\n" | 
| -    "\tmsaa4     \t= gpu(samples=4)\n" | 
| -    "\tglmsaa4   \t= gpu(api=gl,samples=4)\n" | 
| -    "\tmsaa16    \t= gpu(samples=16)\n" | 
| -    "\tnvpr4     \t= gpu(nvpr=true,samples=4)\n" | 
| -    "\tglnvpr4   \t= gpu(api=gl,nvpr=true,samples=4)\n" | 
| -    "\tnvpr16    \t= gpu(nvpr=true,samples=16)\n" | 
| -    "\tnvprdit4  \t= gpu(nvpr=true,samples=4,dit=true)\n" | 
| -    "\tglnvprdit4\t= gpu(api=gl,nvpr=true,samples=4,dit=true)\n" | 
| -    "\tnvprdit16 \t= gpu(nvpr=true,samples=16,dit=true)\n" | 
| -    "\tgpuf16    \t= gpu(color=f16)\n" | 
| -    "\tgpusrgb   \t= gpu(color=srgb)\n" | 
| -    "\tglsrgb    \t= gpu(api=gl,color=srgb)\n" | 
| -    "\tglwide    \t= gpu(api=gl,color=f16_wide)\n" | 
| -    "\tgpudft    \t= gpu(dit=true)\n" | 
| -    "\tgpudebug  \t= gpu(api=debug)\n" | 
| -    "\tgpunull   \t= gpu(api=null)\n" | 
| -    "\tdebug     \t= gpu(api=debug)\n" | 
| -    "\tnullgpu   \t= gpu(api=null)\n" | 
| -#if SK_ANGLE | 
| -#ifdef SK_BUILD_FOR_WIN | 
| -    "\tangle     \t= gpu(api=angle)\n" | 
| -#endif | 
| -    "\tangle-gl  \t= gpu(api=angle-gl)\n" | 
| -#endif | 
| -#if SK_COMMAND_BUFFER | 
| -    "\tcommandbuffer\t= gpu(api=commandbuffer)\n" | 
| -#endif | 
| -#if SK_MESA | 
| -    "\tmesa      \t= gpu(api=mesa)\n" | 
| -#endif | 
| -#ifdef SK_VULKAN | 
| -    "\tvk        \t= gpu(api=vulkan)\n" | 
| -    "\tvksrgb    \t= gpu(api=vulkan,color=srgb)\n" | 
| -    "\tvkwide    \t= gpu(api=vulkan,color=f16_wide)\n" | 
| -    "\tvkmsaa4   \t= gpu(api=gl,samples=4)\n" | 
| -    "\tvkmsaa16  \t= gpu(api=gl,samples=16)\n" | 
| -#endif | 
| +    // Help text for pre-defined configs is auto-generated from gPredefinedConfigs | 
| #endif | 
| ; | 
|  | 
| -DEFINE_extended_string(config, defaultConfigs, configHelp, configExtendedHelp); | 
| - | 
| -static const struct { | 
| -    const char* predefinedConfig; | 
| -    const char* backend; | 
| -    const char* options; | 
| -} gPredefinedConfigs[] = { | 
| -#if SK_SUPPORT_GPU | 
| -    { "gpu",         "gpu", "" }, | 
| -    { "gl",          "gpu", "api=gl" }, | 
| -    { "msaa4",       "gpu", "samples=4" }, | 
| -    { "glmsaa4",     "gpu", "api=gl,samples=4" }, | 
| -    { "msaa16",      "gpu", "samples=16" }, | 
| -    { "nvpr4",       "gpu", "nvpr=true,samples=4" }, | 
| -    { "glnvpr4",     "gpu", "api=gl,nvpr=true,samples=4" }, | 
| -    { "nvpr16",      "gpu", "nvpr=true,samples=16" }, | 
| -    { "nvprdit4",    "gpu", "nvpr=true,samples=4,dit=true" }, | 
| -    { "glnvprdit4",  "gpu", "api=gl,nvpr=true,samples=4,dit=true" }, | 
| -    { "nvprdit16",   "gpu", "nvpr=true,samples=16,dit=true" }, | 
| -    { "glinst",      "gpu", "api=gl,inst=true" }, | 
| -    { "glinst4",     "gpu", "api=gl,inst=true,samples=4" }, | 
| -    { "glinstdit4",  "gpu", "api=gl,inst=true,samples=4,dit=true" }, | 
| -    { "glinst16",    "gpu", "api=gl,inst=true,samples=16" }, | 
| -    { "glinstdit16", "gpu", "api=gl,inst=true,samples=16,dit=true" }, | 
| -    { "esinst",      "gpu", "api=gles,inst=true" }, | 
| -    { "esinst4",     "gpu", "api=gles,inst=true,samples=4" }, | 
| -    { "esinstdit4",  "gpu", "api=gles,inst=true,samples=4,dit=true" }, | 
| -    { "gpuf16",      "gpu", "color=f16" }, | 
| -    { "gpusrgb",     "gpu", "color=srgb" }, | 
| -    { "glsrgb",      "gpu", "api=gl,color=srgb" }, | 
| -    { "glwide",      "gpu", "api=gl,color=f16_wide" }, | 
| -    { "gpudft",      "gpu", "dit=true" }, | 
| -    { "gpudebug",    "gpu", "api=debug" }, | 
| -    { "gpunull",     "gpu", "api=null" }, | 
| -    { "debug",       "gpu", "api=debug" }, | 
| -    { "nullgpu",     "gpu", "api=null" } | 
| -#if SK_ANGLE | 
| -#ifdef SK_BUILD_FOR_WIN | 
| -    , { "angle",      "gpu", "api=angle" } | 
| -#endif | 
| -    , { "angle-gl",   "gpu", "api=angle-gl" } | 
| -#endif | 
| -#if SK_COMMAND_BUFFER | 
| -    , { "commandbuffer", "gpu", "api=commandbuffer" } | 
| -#endif | 
| -#if SK_MESA | 
| -    , { "mesa", "gpu", "api=mesa" } | 
| -#endif | 
| -#ifdef SK_VULKAN | 
| -    , { "vk",       "gpu", "api=vulkan" } | 
| -    , { "vksrgb",   "gpu", "api=vulkan,color=srgb" } | 
| -    , { "vkwide",   "gpu", "api=vulkan,color=f16_wide" } | 
| -    , { "vkmsaa4",  "gpu", "api=vulkan,samples=4" } | 
| -    , { "vkmsaa16", "gpu", "api=vulkan,samples=16" } | 
| -#endif | 
| +static const char* config_extended_help_fn() { | 
| +    static SkString helpString; | 
| +    helpString.set(configExtendedHelp); | 
| +    for (const auto& config : gPredefinedConfigs) { | 
| +        helpString.appendf("\t%-10s\t= gpu(%s)\n", config.predefinedConfig, config.options); | 
| +    } | 
| +    return helpString.c_str(); | 
| +} | 
|  | 
| -#else | 
| -    { "", "", "" } | 
| -#endif | 
| -}; | 
| +DEFINE_extended_string(config, defaultConfigs, config_help_fn(), config_extended_help_fn()); | 
|  | 
| SkCommandLineConfig::SkCommandLineConfig(const SkString& tag, const SkString& backend, | 
| const SkTArray<SkString>& viaParts) | 
|  |