140 lines
4.6 KiB
C++
140 lines
4.6 KiB
C++
// Copyright 2015 The Shaderc Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef LIBSHADERC_SRC_SHADERC_PRIVATE_H_
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#define LIBSHADERC_SRC_SHADERC_PRIVATE_H_
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#include <cassert>
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#include <cstdint>
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#include <string>
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#include <vector>
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#include "shaderc/shaderc.h"
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#include "libshaderc_util/compiler.h"
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#include "spirv-tools/libspirv.h"
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// Described in shaderc.h.
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struct shaderc_compilation_result {
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virtual ~shaderc_compilation_result() {}
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// Returns the data from this compilation as a sequence of bytes.
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virtual const char* GetBytes() const = 0;
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// The size of the output data in term of bytes.
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size_t output_data_size = 0;
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// Compilation messages.
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std::string messages;
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// Number of errors.
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size_t num_errors = 0;
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// Number of warnings.
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size_t num_warnings = 0;
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// Compilation status.
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shaderc_compilation_status compilation_status =
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shaderc_compilation_status_null_result_object;
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};
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// Compilation result class using a vector for holding the compilation
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// output data.
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class shaderc_compilation_result_vector : public shaderc_compilation_result {
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public:
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~shaderc_compilation_result_vector() = default;
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void SetOutputData(std::vector<uint32_t>&& data) {
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output_data_ = std::move(data);
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}
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const char* GetBytes() const override {
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return reinterpret_cast<const char*>(output_data_.data());
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}
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private:
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// Compilation output data. In normal compilation mode, it contains the
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// compiled SPIR-V binary code. In disassembly and preprocessing-only mode, it
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// contains a null-terminated string which is the text output. For text
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// output, extra bytes with value 0x00 might be appended to complete the last
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// uint32_t element.
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std::vector<uint32_t> output_data_;
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};
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// Compilation result class using a spv_binary for holding the compilation
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// output data.
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class shaderc_compilation_result_spv_binary
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: public shaderc_compilation_result {
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public:
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~shaderc_compilation_result_spv_binary() { spvBinaryDestroy(output_data_); }
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void SetOutputData(spv_binary data) { output_data_ = data; }
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const char* GetBytes() const override {
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return reinterpret_cast<const char*>(output_data_->code);
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}
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private:
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spv_binary output_data_ = nullptr;
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};
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namespace shaderc_util {
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class GlslangInitializer;
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}
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struct shaderc_compiler {
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std::unique_ptr<shaderc_util::GlslangInitializer> initializer;
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};
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// Converts a shader stage from shaderc_shader_kind into a shaderc_util::Compiler::Stage.
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// This is only valid for a specifically named shader stage, e.g. vertex through fragment,
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// or compute.
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inline shaderc_util::Compiler::Stage shaderc_convert_specific_stage(
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shaderc_shader_kind kind) {
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switch (kind) {
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case shaderc_vertex_shader:
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return shaderc_util::Compiler::Stage::Vertex;
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case shaderc_fragment_shader:
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return shaderc_util::Compiler::Stage::Fragment;
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case shaderc_tess_control_shader:
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return shaderc_util::Compiler::Stage::TessControl;
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case shaderc_tess_evaluation_shader:
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return shaderc_util::Compiler::Stage::TessEval;
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case shaderc_geometry_shader:
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return shaderc_util::Compiler::Stage::Geometry;
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case shaderc_compute_shader:
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return shaderc_util::Compiler::Stage::Compute;
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case shaderc_raygen_shader:
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return shaderc_util::Compiler::Stage::RayGenNV;
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case shaderc_intersection_shader:
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return shaderc_util::Compiler::Stage::IntersectNV;
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case shaderc_anyhit_shader:
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return shaderc_util::Compiler::Stage::AnyHitNV;
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case shaderc_closesthit_shader:
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return shaderc_util::Compiler::Stage::ClosestHitNV;
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case shaderc_miss_shader:
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return shaderc_util::Compiler::Stage::MissNV;
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case shaderc_callable_shader:
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return shaderc_util::Compiler::Stage::CallableNV;
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case shaderc_task_shader:
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return shaderc_util::Compiler::Stage::TaskNV;
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case shaderc_mesh_shader:
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return shaderc_util::Compiler::Stage::MeshNV;
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default:
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// We don't care about the other kinds.
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break;
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}
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// This should not occur.
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assert(false && "Should have specified a specific stage");
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return shaderc_util::Compiler::Stage::TessEval;
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}
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#endif // LIBSHADERC_SRC_SHADERC_PRIVATE_H_
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