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7098d3d692
In this CL the enable directive is implemented. 1. Add AST node for enable directive, assign a ExtensionKind (enum) for each supported extension. 2. Use an unorder_set in ast::Module to record all required extensions' kind. 3. Provide inspector methods for getting names of used extension, and getting all used enable directives' extension names and location. 4. For different writer, the extension nodes are handled in different ways. MSL and HLSL writers will just ignore the extension nodes, while SPIRV and GLSL writers will emit corresponding code. 5. Implement unittests and end2end test for enable directive and inspector, using a reserved extension name `InternalExtensionForTesting`. Bug: tint:1472 Change-Id: I40cb4061554deb477bc2005d7e38c9718385f825 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/86623 Kokoro: Kokoro <noreply+kokoro@google.com> Reviewed-by: Ben Clayton <bclayton@google.com> Commit-Queue: Zhaoming Jiang <zhaoming.jiang@intel.com>
27 lines
829 B
WebGPU Shading Language
27 lines
829 B
WebGPU Shading Language
// Copyright 2022 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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// Enable a void internal extension
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enable InternalExtensionForTesting;
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fn bar() {
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}
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@stage(fragment)
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fn main() -> @location(0) vec4<f32> {
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var a : vec2<f32> = vec2<f32>();
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bar();
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return vec4<f32>(0.4, 0.4, 0.8, 1.0);
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}
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