blob: d12628d2355cf5b1a2653866b5217f82713e26ba [file] [log] [blame]
* Copyright 2022 Google LLC
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#include "include/core/SkData.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkString.h"
#include "include/private/SkSLProgramKind.h"
#include "src/core/SkOSFile.h"
#include "src/sksl/SkSLCompiler.h"
#include "src/sksl/SkSLUtil.h"
#include "src/sksl/ir/SkSLProgram.h"
#include "src/utils/SkOSPath.h"
#include "tests/Test.h"
#include "tools/Resources.h"
#include <functional>
#include <memory>
#include <sstream>
#include <string>
#include <utility>
#include <vector>
static std::vector<std::string> get_expected_errors(const char* shaderString) {
// Error expectations are embedded in the source with a special *%%* marker, like so:
// /*%%*
// expected 'foo', but found 'bar'
// 'baz' is not a valid identifier
// *%%*/
// Extract them from the shader text.
std::vector<std::string> expectedErrors;
constexpr char kExpectedErrorsStart[] = "/*%%*";
constexpr char kExpectedErrorsEnd[] = "*%%*/";
if (const char* startPtr = strstr(shaderString, kExpectedErrorsStart)) {
startPtr += strlen(kExpectedErrorsStart);
if (const char* endPtr = strstr(startPtr, kExpectedErrorsEnd)) {
// Store the text between these delimiters in an array of expected errors.
std::stringstream stream{std::string{startPtr, endPtr}};
while (stream.good()) {
std::getline(stream, expectedErrors.back(), '\n');
if (expectedErrors.back().empty()) {
return expectedErrors;
static void check_expected_errors(skiatest::Reporter* r,
const char* testFile,
const std::vector<std::string>& expectedErrors,
std::string reportedErrors) {
// Verify that the SkSL compiler actually emitted the expected error messages.
// The list of expectations isn't necessarily exhaustive, though.
std::string originalErrors = reportedErrors;
bool reportOriginalErrors = false;
for (const std::string& expectedError : expectedErrors) {
// If this error wasn't reported, trigger an error.
size_t pos = reportedErrors.find(expectedError.c_str());
if (pos == std::string::npos) {
ERRORF(r, "%s: Expected an error that wasn't reported:\n%s\n",
SkOSPath::Basename(testFile).c_str(), expectedError.c_str());
reportOriginalErrors = true;
} else {
// We found the error that we expected to have. Remove that error from our report, and
// everything preceding it as well. This ensures that we don't match the same error
// twice, and that errors are reported in the order we expect.
reportedErrors.erase(0, pos + expectedError.size());
if (reportOriginalErrors) {
ERRORF(r, "%s: The following errors were reported:\n%s\n",
SkOSPath::Basename(testFile).c_str(), originalErrors.c_str());
static void test_expect_fail(skiatest::Reporter* r, const char* testFile, SkSL::ProgramKind kind) {
sk_sp<SkData> shaderData = GetResourceAsData(testFile);
if (!shaderData) {
ERRORF(r, "%s: Unable to load file", SkOSPath::Basename(testFile).c_str());
std::string shaderString{reinterpret_cast<const char*>(shaderData->bytes()),
std::vector<std::string> expectedErrors = get_expected_errors(shaderString.c_str());
// Compile the code.
std::unique_ptr<SkSL::ShaderCaps> caps = SkSL::ShaderCapsFactory::Standalone();
SkSL::Compiler compiler(caps.get());
SkSL::Program::Settings settings;
std::unique_ptr<SkSL::Program> program = compiler.convertProgram(kind, std::move(shaderString),
// If the code actually generated a working program, we've already failed.
if (program) {
ERRORF(r, "%s: Expected failure, but compiled successfully",
check_expected_errors(r, testFile, expectedErrors, compiler.errorText());
static void iterate_dir(const char* directory,
const char* extension,
const std::function<void(const char*)>& run) {
SkString resourceDirectory = GetResourcePath(directory);
SkOSFile::Iter iter(resourceDirectory.c_str(), extension);
SkString name;
while (, /*getDir=*/false)) {
SkString path(SkOSPath::Join(directory, name.c_str()));
DEF_TEST(SkSLErrorTest, r) {
iterate_dir("sksl/errors/", ".sksl", [&](const char* path) {
test_expect_fail(r, path, SkSL::ProgramKind::kFragment);
iterate_dir("sksl/errors/", ".rts", [&](const char* path) {
test_expect_fail(r, path, SkSL::ProgramKind::kRuntimeShader);
DEF_TEST(SkSLRuntimeShaderErrorTest, r) {
iterate_dir("sksl/runtime_errors/", ".rts", [&](const char* path) {
test_expect_fail(r, path, SkSL::ProgramKind::kRuntimeShader);
DEF_TEST(SkSLRuntimeColorFilterErrorTest, r) {
iterate_dir("sksl/runtime_errors/", ".rtcf", [&](const char* path) {
test_expect_fail(r, path, SkSL::ProgramKind::kRuntimeColorFilter);
DEF_TEST(SkSLRuntimeBlenderErrorTest, r) {
iterate_dir("sksl/runtime_errors/", ".rtb", [&](const char* path) {
test_expect_fail(r, path, SkSL::ProgramKind::kRuntimeBlender);