116 lines
3.5 KiB
C++
116 lines
3.5 KiB
C++
// Copyright 2021 The Tint Authors.
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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 SRC_TINT_WRITER_GLSL_GENERATOR_H_
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#define SRC_TINT_WRITER_GLSL_GENERATOR_H_
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#include <memory>
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#include <string>
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#include <unordered_map>
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#include <utility>
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#include <vector>
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#include "src/tint/ast/access.h"
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#include "src/tint/ast/pipeline_stage.h"
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#include "src/tint/sem/binding_point.h"
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#include "src/tint/sem/sampler_texture_pair.h"
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#include "src/tint/writer/glsl/version.h"
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#include "src/tint/writer/text.h"
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// Forward declarations
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namespace tint {
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class Program;
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} // namespace tint
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namespace tint::writer::glsl {
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using BindingMap = std::unordered_map<sem::SamplerTexturePair, std::string>;
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/// Configuration options used for generating GLSL.
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struct Options {
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/// Constructor
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Options();
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/// Destructor
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~Options();
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/// Copy constructor
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Options(const Options&);
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/// A map of SamplerTexturePair to combined sampler names for the
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/// CombineSamplers transform
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BindingMap binding_map;
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/// The binding point to use for placeholder samplers.
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sem::BindingPoint placeholder_binding_point;
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/// A map of old binding point to new binding point for the BindingRemapper
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/// transform
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std::unordered_map<sem::BindingPoint, sem::BindingPoint> binding_points;
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/// A map of old binding point to new access control for the BindingRemapper
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/// transform
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std::unordered_map<sem::BindingPoint, ast::Access> access_controls;
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/// If true, then validation will be disabled for binding point collisions
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/// generated by the BindingRemapper transform
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bool allow_collisions = false;
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/// Set to `true` to disable workgroup memory zero initialization
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bool disable_workgroup_init = false;
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/// Set to 'true' to generates binding mappings for external textures
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bool generate_external_texture_bindings = false;
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/// The GLSL version to emit
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Version version;
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};
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/// The result produced when generating GLSL.
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struct Result {
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/// Constructor
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Result();
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/// Destructor
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~Result();
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/// Copy constructor
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Result(const Result&);
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/// True if generation was successful.
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bool success = false;
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/// The errors generated during code generation, if any.
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std::string error;
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/// The generated GLSL.
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std::string glsl = "";
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/// The list of entry points in the generated GLSL.
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std::vector<std::pair<std::string, ast::PipelineStage>> entry_points;
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};
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/// Generate GLSL for a program, according to a set of configuration options.
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/// The result will contain the GLSL, as well as success status and diagnostic
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/// information.
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/// @param program the program to translate to GLSL
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/// @param options the configuration options to use when generating GLSL
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/// @param entry_point the entry point to generate GLSL for
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/// @returns the resulting GLSL and supplementary information
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Result Generate(const Program* program, const Options& options, const std::string& entry_point);
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} // namespace tint::writer::glsl
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#endif // SRC_TINT_WRITER_GLSL_GENERATOR_H_
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