/*

 * Copyright 2019 Google, LLC

 *

 * Use of this source code is governed by a BSD-style license that can be

 * found in the LICENSE file.

 */

#include "src/gpu/GrShaderCaps.h"

#include "src/sksl/SkSLCompiler.h"

#include "fuzz/Fuzz.h"

bool FuzzSKSL2SPIRV(sk_sp<SkData> bytes) {

    sk_sp<GrShaderCaps> caps = SkSL::ShaderCapsFactory::Default();

    SkSL::Compiler compiler(caps.get());

    SkSL::String output;

    SkSL::Program::Settings settings;

    // This tells the compiler where the rt-flip uniform will live should it be required. For

    // fuzzing purposes we don't care where that is, but the compiler will report an error if we

    // leave them at their default invalid values, or if the offset overlaps another uniform.

    settings.fRTFlipOffset  = 16384;

    settings.fRTFlipSet     = 0;

    settings.fRTFlipBinding = 0;

    std::unique_ptr<SkSL::Program> program = compiler.convertProgram(

                                                    SkSL::ProgramKind::kFragment,

                                                    SkSL::String((const char*) bytes->data(),

                                                                 bytes->size()),

                                                    settings);

    if (!program || !compiler.toSPIRV(*program, &output)) {

        return false;

    }

    return true;

}

#if defined(SK_BUILD_FOR_LIBFUZZER)

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {

    if (size > 3000) {

        return 0;

    }

    auto bytes = SkData::MakeWithoutCopy(data, size);

    FuzzSKSL2SPIRV(bytes);

    return 0;

}

#endif