1 /*
2 * Copyright 2019 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/gpu/GrShaderCaps.h"
9 #include "src/sksl/SkSLCompiler.h"
10 #include "src/sksl/codegen/SkSLPipelineStageCodeGenerator.h"
11 #include "src/sksl/ir/SkSLVarDeclarations.h"
12 #include "src/sksl/ir/SkSLVariable.h"
13
14 #include "fuzz/Fuzz.h"
15
FuzzSKSL2Pipeline(sk_sp<SkData> bytes)16 bool FuzzSKSL2Pipeline(sk_sp<SkData> bytes) {
17 std::unique_ptr<GrShaderCaps> caps = SkSL::ShaderCapsFactory::Default();
18 SkSL::Compiler compiler(caps.get());
19 SkSL::Program::Settings settings;
20 std::unique_ptr<SkSL::Program> program = compiler.convertProgram(
21 SkSL::ProgramKind::kRuntimeShader,
22 SkSL::String((const char*) bytes->data(),
23 bytes->size()),
24 settings);
25 if (!program) {
26 return false;
27 }
28
29 class Callbacks : public SkSL::PipelineStage::Callbacks {
30 using String = SkSL::String;
31
32 String declareUniform(const SkSL::VarDeclaration* decl) override {
33 return String(decl->var().name());
34 }
35
36 void defineFunction(const char* /*decl*/, const char* /*body*/, bool /*isMain*/) override {}
37 void declareFunction(const char* /*decl*/) override {}
38 void defineStruct(const char* /*definition*/) override {}
39 void declareGlobal(const char* /*declaration*/) override {}
40
41 String sampleShader(int index, String coords) override {
42 return "child_" + SkSL::to_string(index) + ".eval(" + coords + ")";
43 }
44
45 String sampleColorFilter(int index, String color) override {
46 return "child_" + SkSL::to_string(index) + ".eval(" + color + ")";
47 }
48
49 String sampleBlender(int index, String src, String dst) override {
50 return "child_" + SkSL::to_string(index) + ".eval(" + src + ", " + dst + ")";
51 }
52 };
53
54 Callbacks callbacks;
55 SkSL::PipelineStage::ConvertProgram(*program, "coords", "inColor", "half4(1)", &callbacks);
56 return true;
57 }
58
59 #if defined(SK_BUILD_FOR_LIBFUZZER)
LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)60 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
61 if (size > 3000) {
62 return 0;
63 }
64 auto bytes = SkData::MakeWithoutCopy(data, size);
65 FuzzSKSL2Pipeline(bytes);
66 return 0;
67 }
68 #endif
69