1 /*
2 * Copyright 2016 Google Inc.
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 <fstream>
9 #include "SkSLCompiler.h"
10 #include "SkSLFileOutputStream.h"
11
12 // Given the path to a file (e.g. src/gpu/effects/GrFooFragmentProcessor.fp) and the expected
13 // filename prefix and suffix (e.g. "Gr" and ".fp"), returns the "base name" of the
14 // file (in this case, 'FooFragmentProcessor'). If no match, returns the empty string.
base_name(const char * fpPath,const char * prefix,const char * suffix)15 static SkSL::String base_name(const char* fpPath, const char* prefix, const char* suffix) {
16 SkSL::String result;
17 const char* end = fpPath + strlen(fpPath);
18 const char* fileName = end;
19 // back up until we find a slash
20 while (fileName != fpPath && '/' != *(fileName - 1) && '\\' != *(fileName - 1)) {
21 --fileName;
22 }
23 if (!strncmp(fileName, prefix, strlen(prefix)) &&
24 !strncmp(end - strlen(suffix), suffix, strlen(suffix))) {
25 result.append(fileName + strlen(prefix), end - fileName - strlen(prefix) - strlen(suffix));
26 }
27 return result;
28 }
29
30 /**
31 * Very simple standalone executable to facilitate testing.
32 */
main(int argc,const char ** argv)33 int main(int argc, const char** argv) {
34 if (argc != 3) {
35 printf("usage: skslc <input> <output>\n");
36 exit(1);
37 }
38 SkSL::Program::Kind kind;
39 SkSL::String input(argv[1]);
40 if (input.endsWith(".vert")) {
41 kind = SkSL::Program::kVertex_Kind;
42 } else if (input.endsWith(".frag")) {
43 kind = SkSL::Program::kFragment_Kind;
44 } else if (input.endsWith(".geom")) {
45 kind = SkSL::Program::kGeometry_Kind;
46 } else if (input.endsWith(".fp")) {
47 kind = SkSL::Program::kFragmentProcessor_Kind;
48 } else {
49 printf("input filename must end in '.vert', '.frag', '.geom', or '.fp'\n");
50 exit(1);
51 }
52
53 std::ifstream in(argv[1]);
54 std::string stdText((std::istreambuf_iterator<char>(in)),
55 std::istreambuf_iterator<char>());
56 SkSL::String text(stdText.c_str());
57 if (in.rdstate()) {
58 printf("error reading '%s'\n", argv[1]);
59 exit(2);
60 }
61 SkSL::Program::Settings settings;
62 settings.fArgs.insert(std::make_pair("gpImplementsDistanceVector", 1));
63 SkSL::String name(argv[2]);
64 if (name.endsWith(".spirv")) {
65 SkSL::FileOutputStream out(argv[2]);
66 SkSL::Compiler compiler;
67 if (!out.isValid()) {
68 printf("error writing '%s'\n", argv[2]);
69 exit(4);
70 }
71 std::unique_ptr<SkSL::Program> program = compiler.convertProgram(kind, text, settings);
72 if (!program || !compiler.toSPIRV(*program, out)) {
73 printf("%s", compiler.errorText().c_str());
74 exit(3);
75 }
76 if (!out.close()) {
77 printf("error writing '%s'\n", argv[2]);
78 exit(4);
79 }
80 } else if (name.endsWith(".glsl")) {
81 SkSL::FileOutputStream out(argv[2]);
82 SkSL::Compiler compiler;
83 if (!out.isValid()) {
84 printf("error writing '%s'\n", argv[2]);
85 exit(4);
86 }
87 std::unique_ptr<SkSL::Program> program = compiler.convertProgram(kind, text, settings);
88 if (!program || !compiler.toGLSL(*program, out)) {
89 printf("%s", compiler.errorText().c_str());
90 exit(3);
91 }
92 if (!out.close()) {
93 printf("error writing '%s'\n", argv[2]);
94 exit(4);
95 }
96 } else if (name.endsWith(".metal")) {
97 SkSL::FileOutputStream out(argv[2]);
98 SkSL::Compiler compiler;
99 if (!out.isValid()) {
100 printf("error writing '%s'\n", argv[2]);
101 exit(4);
102 }
103 std::unique_ptr<SkSL::Program> program = compiler.convertProgram(kind, text, settings);
104 if (!program || !compiler.toMetal(*program, out)) {
105 printf("%s", compiler.errorText().c_str());
106 exit(3);
107 }
108 if (!out.close()) {
109 printf("error writing '%s'\n", argv[2]);
110 exit(4);
111 }
112 } else if (name.endsWith(".h")) {
113 SkSL::FileOutputStream out(argv[2]);
114 SkSL::Compiler compiler(SkSL::Compiler::kPermitInvalidStaticTests_Flag);
115 if (!out.isValid()) {
116 printf("error writing '%s'\n", argv[2]);
117 exit(4);
118 }
119 settings.fReplaceSettings = false;
120 std::unique_ptr<SkSL::Program> program = compiler.convertProgram(kind, text, settings);
121 if (!program || !compiler.toH(*program, base_name(argv[1], "Gr", ".fp"), out)) {
122 printf("%s", compiler.errorText().c_str());
123 exit(3);
124 }
125 if (!out.close()) {
126 printf("error writing '%s'\n", argv[2]);
127 exit(4);
128 }
129 } else if (name.endsWith(".cpp")) {
130 SkSL::FileOutputStream out(argv[2]);
131 SkSL::Compiler compiler(SkSL::Compiler::kPermitInvalidStaticTests_Flag);
132 if (!out.isValid()) {
133 printf("error writing '%s'\n", argv[2]);
134 exit(4);
135 }
136 settings.fReplaceSettings = false;
137 std::unique_ptr<SkSL::Program> program = compiler.convertProgram(kind, text, settings);
138 if (!program || !compiler.toCPP(*program, base_name(argv[1], "Gr", ".fp"), out)) {
139 printf("%s", compiler.errorText().c_str());
140 exit(3);
141 }
142 if (!out.close()) {
143 printf("error writing '%s'\n", argv[2]);
144 exit(4);
145 }
146 } else {
147 printf("expected output filename to end with '.spirv', '.glsl', '.cpp', '.h', or '.metal'");
148 exit(1);
149 }
150 }
151