tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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SkSLWGSLValidator.cpp (2562B)

      1 /*
      2 * Copyright 2024 Google LLC
      3 *
      4 * Use of this source code is governed by a BSD-style license that can be
      5 * found in the LICENSE file.
      6 */
      7 
      8 #include "src/sksl/codegen/SkSLWGSLValidator.h"
      9 
     10 #include "src/sksl/SkSLErrorReporter.h"
     11 #include "src/sksl/SkSLPosition.h"
     12 
     13 #include "src/tint/lang/wgsl/enums.h"
     14 #include "src/tint/lang/wgsl/reader/options.h"
     15 #include "tint/tint.h"
     16 
     17 namespace SkSL {
     18 
     19 static bool validate_wgsl(ErrorReporter& reporter,
     20                          std::string_view wgsl,
     21                          bool appendError,
     22                          std::string* warnings) {
     23    // Enable the WGSL optional features that Skia might rely on.
     24    tint::wgsl::reader::Options options;
     25    for (auto extension : {tint::wgsl::Extension::kChromiumExperimentalPixelLocal,
     26                           tint::wgsl::Extension::kDualSourceBlending}) {
     27        options.allowed_features.extensions.insert(extension);
     28    }
     29    options.allowed_features.features.insert(
     30            tint::wgsl::LanguageFeature::kUnrestrictedPointerParameters);
     31 
     32    // Verify that the WGSL we produced is valid.
     33    tint::Source::File srcFile("", wgsl);
     34    tint::Program program(tint::wgsl::reader::Parse(&srcFile, options));
     35 
     36    if (program.Diagnostics().ContainsErrors()) {
     37        // The program isn't valid WGSL.
     38        if (appendError) {
     39            // Report the error via SkDEBUGFAIL and append the generated program for
     40            // ease of debugging. We don't do this for our golden test output because
     41            // it can change too often
     42            tint::diag::Formatter diagFormatter;
     43            std::string diagOutput = diagFormatter.Format(program.Diagnostics()).Plain();
     44            diagOutput += "\n";
     45            diagOutput += wgsl;
     46            SkDEBUGFAILF("%s", diagOutput.c_str());
     47        } else {
     48            reporter.error(Position(),
     49                           std::string("Tint compilation failed.\n\n") + std::string(wgsl));
     50        }
     51        return false;
     52    }
     53 
     54    if (!program.Diagnostics().empty()) {
     55        // The program contains warnings. Report them as-is.
     56        tint::diag::Formatter diagFormatter;
     57        *warnings = diagFormatter.Format(program.Diagnostics()).Plain();
     58    }
     59    return true;
     60 }
     61 
     62 bool ValidateWGSL(ErrorReporter& reporter, std::string_view wgsl, std::string* warnings) {
     63    return validate_wgsl(reporter, wgsl, false, warnings);
     64 }
     65 
     66 bool ValidateWGSLVerbose(ErrorReporter& reporter, std::string_view wgsl, std::string* warnings) {
     67    return validate_wgsl(reporter, wgsl, true, warnings);
     68 }
     69 
     70 }  // namespace SkSL