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Bring back the harness from SkSLGLSLTest as a testbed for debugging.

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The code here is resuscitated from the GLSL testing harness at
http://review.skia.org/317771 . Testing and debugging in dm is simpler
than debugging skslc when we encounter compiler issues.

Change-Id: I492dd0bbd2f0ee0b3b6a1b5253da54d72dc1eb3b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/319032
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
This commit is contained in:
John Stiles 2020-09-23 14:08:40 -04:00 committed by Skia Commit-Bot
parent 6756afabb6
commit db62d088ef
2 changed files with 54 additions and 0 deletions
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1
gn/tests.gni
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@ -261,6 +261,7 @@ tests_sources = [
"$_tests/SkRemoteGlyphCacheTest.cpp",
"$_tests/SkResourceCacheTest.cpp",
"$_tests/SkRuntimeEffectTest.cpp",
"$_tests/SkSLGLSLTestbed.cpp",
"$_tests/SkSLInterpreterTest.cpp",
"$_tests/SkSLMemoryLayoutTest.cpp",
"$_tests/SkSLMetalTest.cpp",

53
tests/SkSLGLSLTestbed.cpp Normal file
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@ -0,0 +1,53 @@
/*
* Copyright 2020 Google LLC
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "src/sksl/SkSLCompiler.h"
#include "tests/Test.h"
// Note that the optimizer will aggressively kill dead code and substitute constants in place of
// variables, so we have to jump through a few hoops to ensure that the code in these tests has the
// necessary side-effects to remain live. In some cases we rely on the optimizer not (yet) being
// smart enough to optimize around certain constructs; as the optimizer gets smarter it will
// undoubtedly end up breaking some of these tests. That is a good thing, as long as the new code is
// equivalent!
static void test(skiatest::Reporter* r, const SkSL::Program::Settings& settings, const char* src,
SkSL::Program::Inputs* inputs,
SkSL::Program::Kind kind = SkSL::Program::kFragment_Kind) {
SkSL::Compiler compiler;
SkSL::String output;
std::unique_ptr<SkSL::Program> program = compiler.convertProgram(kind, SkSL::String(src),
settings);
if (!program) {
SkDebugf("Unexpected error compiling %s\n%s", src, compiler.errorText().c_str());
REPORTER_ASSERT(r, program);
} else {
*inputs = program->fInputs;
REPORTER_ASSERT(r, compiler.toGLSL(*program, &output));
REPORTER_ASSERT(r, output != "");
}
}
static void test(skiatest::Reporter* r, const GrShaderCaps& caps, const char* src,
SkSL::Program::Kind kind = SkSL::Program::kFragment_Kind) {
SkSL::Program::Settings settings;
settings.fCaps = &caps;
SkSL::Program::Inputs inputs;
test(r, settings, src, &inputs, kind);
}
DEF_TEST(SkSLGLSLTestbed, r) {
// Add in your SkSL here.
test(r,
*SkSL::ShaderCapsFactory::Default(),
R"__SkSL__(
void main() {
sk_FragColor = half4(0);
}
)__SkSL__");
}