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https://github.com/encounter/dawn-cmake.git
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8f96595540
WGSL now supports type inferencing with `let` declarations, so `var->type()` may return nullptr. Calling a method (`Is<T>()`) on a nullptr object is UB. Instead used the free-function form which can handle nullptr objects. Change-Id: I8faf875e1550eac1306ad731a65f3662bc4e5b43 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/50307 Auto-Submit: Ben Clayton <bclayton@google.com> Kokoro: Kokoro <noreply+kokoro@google.com> Reviewed-by: Brandon Jones <brandon1.jones@intel.com> Commit-Queue: Ben Clayton <bclayton@google.com>
55 lines
2.0 KiB
C++
55 lines
2.0 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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#include "src/transform/external_texture_transform.h"
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#include "src/program_builder.h"
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namespace tint {
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namespace transform {
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ExternalTextureTransform::ExternalTextureTransform() = default;
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ExternalTextureTransform::~ExternalTextureTransform() = default;
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Output ExternalTextureTransform::Run(const Program* in, const DataMap&) {
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ProgramBuilder out;
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CloneContext ctx(&out, in);
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// Scan the AST nodes for external texture declarations.
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for (auto* node : ctx.src->ASTNodes().Objects()) {
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if (auto* var = node->As<ast::Variable>()) {
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if (Is<ast::ExternalTexture>(var->type())) {
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// Replace a single-plane external texture with a 2D, f32 sampled
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// texture.
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auto newType = ctx.dst->ty.sampled_texture(ast::TextureDimension::k2d,
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ctx.dst->ty.f32());
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auto clonedSrc = ctx.Clone(var->source());
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auto clonedSym = ctx.Clone(var->symbol());
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auto* clonedConstructor = ctx.Clone(var->constructor());
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auto clonedDecorations = ctx.Clone(var->decorations());
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auto* newVar = ctx.dst->create<ast::Variable>(
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clonedSrc, clonedSym, var->declared_storage_class(), newType,
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var->is_const(), clonedConstructor, clonedDecorations);
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ctx.Replace(var, newVar);
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}
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}
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}
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ctx.Clone();
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return Output{Program(std::move(out))};
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}
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} // namespace transform
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} // namespace tint
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