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

#ifndef SK_COMMON_FLAGS_CONFIG_H
#define SK_COMMON_FLAGS_CONFIG_H

#include "include/core/SkColorSpace.h"
#include "tools/flags/CommandLineFlags.h"
#include "tools/gpu/GrContextFactory.h"

DECLARE_string(config);

class SkCommandLineConfigGpu;
class SkCommandLineConfigGraphite;
class SkCommandLineConfigSvg;

// SkCommandLineConfig represents a Skia rendering configuration string.
// The string has following form:
// tag:
//   [via-]*backend
// where 'backend' consists of chars excluding hyphen
// and each 'via' consists of chars excluding hyphen.
class SkCommandLineConfig {
public:
    SkCommandLineConfig(const SkString&           tag,
                        const SkString&           backend,
                        const skia_private::TArray<SkString>& viaParts);
    virtual ~SkCommandLineConfig();
    virtual const SkCommandLineConfigGpu* asConfigGpu() const { return nullptr; }
    virtual const SkCommandLineConfigGraphite* asConfigGraphite() const { return nullptr; }
    virtual const SkCommandLineConfigSvg* asConfigSvg() const { return nullptr; }
    const SkString&                       getTag() const { return fTag; }
    const SkString&                       getBackend() const { return fBackend; }
    sk_sp<SkColorSpace>                   refColorSpace() const { return fColorSpace; }
    const skia_private::TArray<SkString>& getViaParts() const { return fViaParts; }

private:
    SkString                       fTag;
    SkString                       fBackend;
    sk_sp<SkColorSpace>            fColorSpace;
    skia_private::TArray<SkString> fViaParts;
};

// SkCommandLineConfigGpu is a SkCommandLineConfig that extracts information out of the backend
// part of the tag. It is constructed tags that have:
// * backends of form "gpu[option=value,option2=value,...]"
// * backends that represent a shorthand of above (such as "glmsaa16" representing
// "gpu(api=gl,samples=16)")
class SkCommandLineConfigGpu : public SkCommandLineConfig {
public:
    enum class SurfType { kDefault, kBackendTexture, kBackendRenderTarget };
    typedef skgpu::ContextType                              ContextType;
    typedef sk_gpu_test::GrContextFactory::ContextOverrides ContextOverrides;

    SkCommandLineConfigGpu(const SkString&           tag,
                           const skia_private::TArray<SkString>& viaParts,
                           ContextType               contextType,
                           bool                      fakeGLESVer2,
                           uint32_t                  surfaceFlags,
                           int                       samples,
                           SkColorType               colorType,
                           SkAlphaType               alphaType,
                           bool                      useStencilBuffers,
                           int                       testPersistentCache,
                           bool                      testPrecompile,
                           bool                      useDDLSink,
                           bool                      slug,
                           bool                      serializedSlug,
                           bool                      remoteSlug,
                           bool                      reducedShaders,
                           SurfType);

    const SkCommandLineConfigGpu* asConfigGpu() const override { return this; }
    ContextType                   getContextType() const { return fContextType; }
    ContextOverrides              getContextOverrides() const { return fContextOverrides; }
    uint32_t      getSurfaceFlags() const { return fSurfaceFlags; }
    int           getSamples() const { return fSamples; }
    SkColorType   getColorType() const { return fColorType; }
    SkAlphaType   getAlphaType() const { return fAlphaType; }
    int           getTestPersistentCache() const { return fTestPersistentCache; }
    bool          getTestPrecompile() const { return fTestPrecompile; }
    bool          getUseDDLSink() const { return fUseDDLSink; }
    bool          getSlug() const { return fSlug; }
    bool          getSerializedSlug() const { return fSerializeSlug; }
    bool          getRemoteSlug() const { return fRemoteSlug; }
    bool          getReducedShaders() const { return fReducedShaders; }
    SurfType      getSurfType() const { return fSurfType; }

private:
    ContextType         fContextType;
    ContextOverrides    fContextOverrides;
    uint32_t            fSurfaceFlags;
    int                 fSamples;
    SkColorType         fColorType;
    SkAlphaType         fAlphaType;
    int                 fTestPersistentCache;
    bool                fTestPrecompile;
    bool                fUseDDLSink;
    bool                fSlug;
    bool                fSerializeSlug;
    bool                fRemoteSlug;
    bool                fReducedShaders;
    SurfType            fSurfType;
};

#if defined(SK_GRAPHITE)

#include "tools/graphite/ContextFactory.h"

class SkCommandLineConfigGraphite : public SkCommandLineConfig {
public:
    using ContextType = skgpu::ContextType;

    enum class SurfaceType {
        // SkSurfaces::RenderTarget()
        kDefault,
        // BackendTexture around a WGPUTextureView passed to SkSurfaces::WrapBackendTexture()
        kWrapTextureView,
    };

    SkCommandLineConfigGraphite(const SkString& tag,
                                const skia_private::TArray<SkString>& viaParts,
                                ContextType contextType,
                                SurfaceType surfaceType,
                                const skiatest::graphite::TestOptions& options,
                                SkColorType colorType,
                                SkAlphaType alphaType,
                                bool testPrecompile)
            : SkCommandLineConfig(tag, SkString("graphite"), viaParts)
            , fOptions(options)
            , fContextType(contextType)
            , fSurfaceType(surfaceType)
            , fColorType(colorType)
            , fAlphaType(alphaType)
            , fTestPrecompile(testPrecompile) {
    }
    const SkCommandLineConfigGraphite* asConfigGraphite() const override { return this; }

    const skiatest::graphite::TestOptions& getOptions() const { return fOptions; }
    ContextType getContextType() const { return fContextType; }
    SurfaceType getSurfaceType() const { return fSurfaceType; }
    SkColorType getColorType() const { return fColorType; }
    SkAlphaType getAlphaType() const { return fAlphaType; }
    bool        getTestPrecompile() const { return fTestPrecompile; }

private:
    skiatest::graphite::TestOptions fOptions;
    ContextType                     fContextType;
    SurfaceType                     fSurfaceType;
    SkColorType                     fColorType;
    SkAlphaType                     fAlphaType;
    bool                            fTestPrecompile;
};

#endif // SK_GRAPHITE

// SkCommandLineConfigSvg is a SkCommandLineConfig that extracts information out of the backend
// part of the tag. It is constructed tags that have:
// * backends of form "svg[option=value,option2=value,...]"
class SkCommandLineConfigSvg : public SkCommandLineConfig {
public:
    SkCommandLineConfigSvg(const SkString& tag, const skia_private::TArray<SkString>& viaParts, int pageIndex);
    const SkCommandLineConfigSvg* asConfigSvg() const override { return this; }

    int getPageIndex() const { return fPageIndex; }

private:
    int fPageIndex;
};

typedef skia_private::TArray<std::unique_ptr<SkCommandLineConfig>, true> SkCommandLineConfigArray;
void ParseConfigs(const CommandLineFlags::StringArray& configList,
                  SkCommandLineConfigArray*            outResult);

#endif