tools/flags/SkCommonFlagsConfig.cpp

/*
 * Copyright 2015 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "SkCommonFlagsConfig.h"
#include "SkImageInfo.h"

#include <stdlib.h>

#if SK_SUPPORT_GPU
using sk_gpu_test::GrContextFactory;
#endif

static const char defaultConfigs[] =
    "8888 gpu nonrendering"
#if SK_ANGLE
#ifdef SK_BUILD_FOR_WIN
    " angle"
#endif
#endif
#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
    " hwui"
#endif
    ;

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
    ,{ "commandbuffer", "gpu", "api=commandbuffer" }
#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

#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
    ;

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)\n"
    "\tapi\ttype: string\tdefault: native.\n"
    "\t    Select graphics API to use with gpu backend.\n"
    "\t    Options:\n"
    "\t\tnative\t\t\tUse platform default OpenGL or OpenGL ES backend.\n"
    "\t\tgl    \t\t\tUse OpenGL.\n"
    "\t\tgles  \t\t\tUse OpenGL ES.\n"
    "\t\tdebug \t\t\tUse debug OpenGL.\n"
    "\t\tnull  \t\t\tUse null OpenGL.\n"
#if SK_ANGLE
#ifdef SK_BUILD_FOR_WIN
    "\t\tangle\t\t\tUse ANGLE DirectX.\n"
#endif
    "\t\tangle-gl\t\t\tUse ANGLE OpenGL.\n"
#endif
    "\t\tcommandbuffer\t\tUse command buffer.\n"
#if SK_MESA
    "\t\tmesa\t\t\tUse MESA.\n"
#endif
#ifdef SK_VULKAN
    "\t\tvulkan\t\t\tUse Vulkan.\n"
#endif
    "\tcolor\ttype: string\tdefault: 8888.\n"
    "\t    Select framebuffer color format.\n"
    "\t    Options:\n"
    "\t\t8888\t\t\tLinear 8888.\n"
    "\t\tf16{_gamut}\t\tLinear 16-bit floating point.\n"
    "\t\tsrgb{_gamut}\t\tsRGB 8888.\n"
    "\t  gamut\ttype: string\tdefault: srgb.\n"
    "\t    Select color gamut for f16 or sRGB format buffers.\n"
    "\t    Options:\n"
    "\t\tsrgb\t\t\tsRGB gamut.\n"
    "\t\twide\t\t\tWide Gamut RGB.\n"
    "\tdit\ttype: bool\tdefault: false.\n"
    "\t    Use device independent text.\n"
    "\tnvpr\ttype: bool\tdefault: false.\n"
    "\t    Use NV_path_rendering OpenGL and OpenGL ES extension.\n"
    "\tsamples\ttype: int\tdefault: 0.\n"
    "\t    Use multisampling with N samples.\n"
    "\n"
    "Predefined configs:\n\n"
    // Help text for pre-defined configs is auto-generated from gPredefinedConfigs
#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();
}

DEFINE_extended_string(config, defaultConfigs, config_help_fn(), config_extended_help_fn());

SkCommandLineConfig::SkCommandLineConfig(const SkString& tag, const SkString& backend,
                                         const SkTArray<SkString>& viaParts)
        : fTag(tag)
        , fBackend(backend)
        , fViaParts(viaParts) {
}
SkCommandLineConfig::~SkCommandLineConfig() {
}

#if SK_SUPPORT_GPU
SkCommandLineConfigGpu::SkCommandLineConfigGpu(
    const SkString& tag, const SkTArray<SkString>& viaParts, ContextType contextType, bool useNVPR,
    bool useInstanced, bool useDIText, int samples, SkColorType colorType,
    sk_sp<SkColorSpace> colorSpace)
        : SkCommandLineConfig(tag, SkString("gpu"), viaParts)
        , fContextType(contextType)
        , fContextOptions(ContextOptions::kNone)
        , fUseDIText(useDIText)
        , fSamples(samples)
        , fColorType(colorType)
        , fColorSpace(std::move(colorSpace)) {
    if (useNVPR) {
        fContextOptions |= ContextOptions::kEnableNVPR;
    }
    if (useInstanced) {
        fContextOptions |= ContextOptions::kUseInstanced;
    }
    if (SkColorAndColorSpaceAreGammaCorrect(colorType, colorSpace.get())) {
        fContextOptions |= ContextOptions::kRequireSRGBSupport;
    }
}
static bool parse_option_int(const SkString& value, int* outInt) {
    if (value.isEmpty()) {
        return false;
    }
    char* endptr = nullptr;
    long intValue = strtol(value.c_str(), &endptr, 10);
    if (*endptr != '\0') {
        return false;
    }
    *outInt = static_cast<int>(intValue);
    return true;
}
static bool parse_option_bool(const SkString& value, bool* outBool) {
    if (value.equals("true")) {
        *outBool = true;
        return true;
    }
    if (value.equals("false")) {
        *outBool = false;
        return true;
    }
    return false;
}
static bool parse_option_gpu_api(const SkString& value,
                                 SkCommandLineConfigGpu::ContextType* outContextType) {
    if (value.equals("gl")) {
        *outContextType = GrContextFactory::kGL_ContextType;
        return true;
    }
    if (value.equals("gles")) {
        *outContextType = GrContextFactory::kGLES_ContextType;
        return true;
    }
    if (value.equals("debug")) {
        *outContextType = GrContextFactory::kDebugGL_ContextType;
        return true;
    }
    if (value.equals("null")) {
        *outContextType = GrContextFactory::kNullGL_ContextType;
        return true;
    }
#if SK_ANGLE
#ifdef SK_BUILD_FOR_WIN
    if (value.equals("angle")) {
        *outContextType = GrContextFactory::kANGLE_ContextType;
        return true;
    }
#endif
    if (value.equals("angle-gl")) {
        *outContextType = GrContextFactory::kANGLE_GL_ContextType;
        return true;
    }
#endif
    if (value.equals("commandbuffer")) {
        *outContextType = GrContextFactory::kCommandBuffer_ContextType;
        return true;
    }
#if SK_MESA
    if (value.equals("mesa")) {
        *outContextType = GrContextFactory::kMESA_ContextType;
        return true;
    }
#endif
#ifdef SK_VULKAN
    if (value.equals("vulkan")) {
        *outContextType = GrContextFactory::kVulkan_ContextType;
        return true;
    }
#endif
    return false;
}
static bool parse_option_gpu_color(const SkString& value,
                                   SkColorType* outColorType,
                                   sk_sp<SkColorSpace>* outColorSpace) {
    if (value.equals("8888")) {
        *outColorType = kN32_SkColorType;
        *outColorSpace = nullptr;
        return true;
    }

    SkTArray<SkString> commands;
    SkStrSplit(value.c_str(), "_", &commands);
    if (commands.count() < 1 || commands.count() > 2) {
        return false;
    }

    // First, figure out color gamut that we'll work in (default to sRGB)
    sk_sp<SkColorSpace> colorSpace = SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named);
    if (commands.count() == 2) {
        if (commands[1].equals("srgb")) {
            // sRGB gamut (which is our default)
        } else if (commands[1].equals("wide")) {
            // WideGamut RGB
            const float gWideGamutRGB_toXYZD50[]{
                0.7161046f, 0.1009296f, 0.1471858f,  // -> X
                0.2581874f, 0.7249378f, 0.0168748f,  // -> Y
                0.0000000f, 0.0517813f, 0.7734287f,  // -> Z
            };
            SkMatrix44 wideGamutRGBMatrix(SkMatrix44::kUninitialized_Constructor);
            wideGamutRGBMatrix.set3x3RowMajorf(gWideGamutRGB_toXYZD50);
            colorSpace = SkColorSpace::NewRGB(SkColorSpace::kSRGB_RenderTargetGamma,
                                              wideGamutRGBMatrix);
        } else {
            // Unknown color gamut
            return false;
        }
    }

    // Now pick a color type
    if (commands[0].equals("f16")) {
        *outColorType = kRGBA_F16_SkColorType;
        *outColorSpace = colorSpace->makeLinearGamma();
        return true;
    }
    if (commands[0].equals("srgb")) {
        *outColorType = kN32_SkColorType;
        *outColorSpace = colorSpace;
        return true;
    }
    return false;
}

SkCommandLineConfigGpu* parse_command_line_config_gpu(const SkString& tag,
                                                      const SkTArray<SkString>& vias,
                                                      const SkString& options) {
    // Defaults for GPU backend.
    bool seenAPI = false;
    SkCommandLineConfigGpu::ContextType contextType = GrContextFactory::kNativeGL_ContextType;
    bool seenUseNVPR = false;
    bool useNVPR = false;
    bool seenUseInstanced = false;
    bool useInstanced = false;
    bool seenUseDIText =false;
    bool useDIText = false;
    bool seenSamples = false;
    int samples = 0;
    bool seenColor = false;
    SkColorType colorType = kN32_SkColorType;
    sk_sp<SkColorSpace> colorSpace = nullptr;

    SkTArray<SkString> optionParts;
    SkStrSplit(options.c_str(), ",", kStrict_SkStrSplitMode, &optionParts);
    for (int i = 0; i < optionParts.count(); ++i) {
        SkTArray<SkString> keyValueParts;
        SkStrSplit(optionParts[i].c_str(), "=", kStrict_SkStrSplitMode, &keyValueParts);
        if (keyValueParts.count() != 2) {
            return nullptr;
        }
        const SkString& key = keyValueParts[0];
        const SkString& value = keyValueParts[1];
        bool valueOk = false;
        if (key.equals("api") && !seenAPI) {
            valueOk = parse_option_gpu_api(value, &contextType);
            seenAPI = true;
        } else if (key.equals("nvpr") && !seenUseNVPR) {
            valueOk = parse_option_bool(value, &useNVPR);
            seenUseNVPR = true;
        } else if (key.equals("inst") && !seenUseInstanced) {
            valueOk = parse_option_bool(value, &useInstanced);
            seenUseInstanced = true;
        } else if (key.equals("dit") && !seenUseDIText) {
            valueOk = parse_option_bool(value, &useDIText);
            seenUseDIText = true;
        } else if (key.equals("samples") && !seenSamples) {
            valueOk = parse_option_int(value, &samples);
            seenSamples = true;
        } else if (key.equals("color") && !seenColor) {
            valueOk = parse_option_gpu_color(value, &colorType, &colorSpace);
            seenColor = true;
        }
        if (!valueOk) {
            return nullptr;
        }
    }
    return new SkCommandLineConfigGpu(tag, vias, contextType, useNVPR, useInstanced, useDIText,
                                      samples, colorType, colorSpace);
}
#endif

void ParseConfigs(const SkCommandLineFlags::StringArray& configs,
                  SkCommandLineConfigArray* outResult) {
    outResult->reset();
    for (int i = 0; i < configs.count(); ++i) {
        SkString extendedBackend;
        SkString extendedOptions;
        SkString simpleBackend;
        SkTArray<SkString> vias;

        SkString tag(configs[i]);
        SkTArray<SkString> parts;
        SkStrSplit(tag.c_str(), "(", kStrict_SkStrSplitMode, &parts);
        if (parts.count() == 2) {
            SkTArray<SkString> parts2;
            SkStrSplit(parts[1].c_str(), ")", kStrict_SkStrSplitMode, &parts2);
            if (parts2.count() == 2 && parts2[1].isEmpty()) {
                SkStrSplit(parts[0].c_str(), "-", kStrict_SkStrSplitMode, &vias);
                if (vias.count()) {
                    extendedBackend = vias[vias.count() - 1];
                    vias.pop_back();
                } else {
                    extendedBackend = parts[0];
                }
                extendedOptions = parts2[0];
                simpleBackend.printf("%s(%s)", extendedBackend.c_str(), extendedOptions.c_str());
            }
        }

        if (extendedBackend.isEmpty()) {
            simpleBackend = tag;
            SkStrSplit(tag.c_str(), "-", kStrict_SkStrSplitMode, &vias);
            if (vias.count()) {
                simpleBackend = vias[vias.count() - 1];
                vias.pop_back();
            }
            // Note: no #if SK_ANGLE: this is a special rule in the via-tag grammar.
            if (vias.count() && simpleBackend.equals("gl") &&
                vias[vias.count() - 1].equals("angle")) {
                simpleBackend = "angle-gl";
                vias.pop_back();
            }

            for (auto& predefinedConfig : gPredefinedConfigs) {
                if (simpleBackend.equals(predefinedConfig.predefinedConfig)) {
                    extendedBackend = predefinedConfig.backend;
                    extendedOptions = predefinedConfig.options;
                    break;
                }
            }
        }
        SkCommandLineConfig* parsedConfig = nullptr;
#if SK_SUPPORT_GPU
        if (extendedBackend.equals("gpu")) {
            parsedConfig = parse_command_line_config_gpu(tag, vias, extendedOptions);
        }
#endif
        if (!parsedConfig) {
            parsedConfig = new SkCommandLineConfig(tag, simpleBackend, vias);
        }
        outResult->emplace_back(parsedConfig);
    }
}