/*

 * Copyright 2020 Google LLC

 *

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

 * found in the LICENSE file.

 */

#include "src/sksl/codegen/SkSLSPIRVtoHLSL.h"

#if defined(SK_DIRECT3D)

#include "third_party/externals/spirv-cross/spirv_hlsl.hpp"

/*

 * This translation unit serves as a bridge between Skia/SkSL and SPIRV-Cross.

 * Each library is built with a separate copy of spirv.h (or spirv.hpp), so we

 * avoid conflicts by never including both in the same cpp.

 */

namespace SkSL {

bool SPIRVtoHLSL(const String& spirv, String* hlsl) {

    spirv_cross::CompilerHLSL hlslCompiler((const uint32_t*)spirv.c_str(),

                                           spirv.size() / sizeof(uint32_t));

    spirv_cross::CompilerGLSL::Options optionsGLSL;

    // Force all uninitialized variables to be 0, otherwise they will fail to compile

    // by FXC.

    optionsGLSL.force_zero_initialized_variables = true;

    spirv_cross::CompilerHLSL::Options optionsHLSL;

    optionsHLSL.shader_model = 51;

    // PointCoord and PointSize are not supported in HLSL

    optionsHLSL.point_coord_compat = true;

    optionsHLSL.point_size_compat = true;

    hlslCompiler.set_common_options(optionsGLSL);

    hlslCompiler.set_hlsl_options(optionsHLSL);

    hlsl->assign(hlslCompiler.compile());

    return true;

}

}

#else

namespace SkSL { bool SPIRVtoHLSL(const String&, String*) { return false; } }

#endif