1 /*
2 * Copyright 2023 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/SkSLToBackend.h"
9
10 #include "include/gpu/ShaderErrorHandler.h"
11 #include "include/private/base/SkDebug.h"
12 #include "src/sksl/SkSLCompiler.h"
13 #include "src/sksl/ir/SkSLProgram.h"
14 #include "src/utils/SkShaderUtils.h"
15
16 #include <memory>
17 #include <string>
18
19 namespace skgpu {
20
SkSLToBackend(const SkSL::ShaderCaps * caps,bool (* toBackend)(SkSL::Program &,const SkSL::ShaderCaps *,std::string *),const char * backendLabel,const std::string & sksl,SkSL::ProgramKind programKind,const SkSL::ProgramSettings & settings,std::string * output,SkSL::ProgramInterface * outInterface,ShaderErrorHandler * errorHandler)21 bool SkSLToBackend(const SkSL::ShaderCaps* caps,
22 bool (*toBackend)(SkSL::Program&, const SkSL::ShaderCaps*, std::string*),
23 const char* backendLabel,
24 const std::string& sksl,
25 SkSL::ProgramKind programKind,
26 const SkSL::ProgramSettings& settings,
27 std::string* output,
28 SkSL::ProgramInterface* outInterface,
29 ShaderErrorHandler* errorHandler) {
30 #ifdef SK_DEBUG
31 std::string src = SkShaderUtils::PrettyPrint(sksl);
32 #else
33 const std::string& src = sksl;
34 #endif
35 SkSL::Compiler compiler;
36 std::unique_ptr<SkSL::Program> program = compiler.convertProgram(programKind, src, settings);
37 if (!program || !(*toBackend)(*program, caps, output)) {
38 errorHandler->compileError(src.c_str(),
39 compiler.errorText().c_str(),
40 /*shaderWasCached=*/false);
41 return false;
42 }
43
44 #if defined(SK_PRINT_SKSL_SHADERS)
45 const bool kPrintSkSL = true;
46 #else
47 const bool kPrintSkSL = false;
48 #endif
49 const bool kSkSLPostCompilation = false;
50 #if defined(SK_PRINT_NATIVE_SHADERS)
51 const bool printBackendSL = (backendLabel != nullptr);
52 #else
53 const bool printBackendSL = false;
54 #endif
55
56 if (kPrintSkSL || kSkSLPostCompilation || printBackendSL) {
57 SkShaderUtils::PrintShaderBanner(programKind);
58 if (kPrintSkSL) {
59 SkDebugf("SkSL:\n");
60 SkShaderUtils::PrintLineByLine(SkShaderUtils::PrettyPrint(sksl));
61 }
62 if (kSkSLPostCompilation) {
63 SkDebugf("SkSL (post-compilation):\n");
64 SkShaderUtils::PrintLineByLine(SkShaderUtils::PrettyPrint(program->description()));
65 }
66 if (printBackendSL) {
67 SkDebugf("%s:\n", backendLabel);
68 SkShaderUtils::PrintLineByLine(*output);
69 }
70 }
71
72 if (outInterface) {
73 *outInterface = program->fInterface;
74 }
75 return true;
76 }
77
78 } // namespace skgpu
79