119 lines
3.8 KiB
C++
119 lines
3.8 KiB
C++
// Copyright 2020 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_MSL_GENERATOR_H_
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#define SRC_TINT_WRITER_MSL_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 <unordered_set>
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#include <vector>
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#include "src/tint/writer/array_length_from_uniform_options.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::msl {
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/// Configuration options used for generating MSL.
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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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/// Copy assignment
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/// @returns this Options
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Options& operator=(const Options&);
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/// The index to use when generating a UBO to receive storage buffer sizes.
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/// Defaults to 30, which is the last valid buffer slot.
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uint32_t buffer_size_ubo_index = 30;
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/// The fixed sample mask to combine with fragment shader outputs.
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/// Defaults to 0xFFFFFFFF.
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uint32_t fixed_sample_mask = 0xFFFFFFFF;
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/// Set to `true` to generate a [[point_size]] attribute which is set to 1.0
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/// for all vertex shaders in the module.
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bool emit_vertex_point_size = 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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/// Options used to specify a mapping of binding points to indices into a UBO
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/// from which to load buffer sizes.
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ArrayLengthFromUniformOptions array_length_from_uniform = {};
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// NOTE: Update src/tint/fuzzers/data_builder.h when adding or changing any
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// struct members.
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};
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/// The result produced when generating MSL.
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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 MSL.
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std::string msl = "";
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/// True if the shader needs a UBO of buffer sizes.
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bool needs_storage_buffer_sizes = false;
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/// True if the generated shader uses the invariant attribute.
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bool has_invariant_attribute = false;
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/// A map from entry point name to a list of dynamic workgroup allocations.
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/// Each entry in the vector is the size of the workgroup allocation that
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/// should be created for that index.
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std::unordered_map<std::string, std::vector<uint32_t>> workgroup_allocations;
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/// Indices into the array_length_from_uniform binding that are statically
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/// used.
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std::unordered_set<uint32_t> used_array_length_from_uniform_indices;
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};
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/// Generate MSL for a program, according to a set of configuration options. The
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/// result will contain the MSL, as well as success status and diagnostic
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/// information.
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/// @param program the program to translate to MSL
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/// @param options the configuration options to use when generating MSL
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/// @returns the resulting MSL and supplementary information
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Result Generate(const Program* program, const Options& options);
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} // namespace tint::writer::msl
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#endif // SRC_TINT_WRITER_MSL_GENERATOR_H_
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