1 /*
2  * Copyright 2015 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 "GrDrawOpTest.h"
9 #include "GrCaps.h"
10 #include "GrContext.h"
11 #include "GrUserStencilSettings.h"
12 #include "SkRandom.h"
13 #include "SkTypes.h"
14 
15 #if GR_TEST_UTILS
16 
17 const GrUserStencilSettings* GrGetRandomStencil(SkRandom* random, GrContext* context) {
18     if (context->caps()->avoidStencilBuffers()) {
19         return &GrUserStencilSettings::kUnused;
20     }
21     static constexpr GrUserStencilSettings kReads(
22         GrUserStencilSettings::StaticInit<
23             0x8080,
24             GrUserStencilTest::kLess,
25             0xffff,
26             GrUserStencilOp::kKeep,
27             GrUserStencilOp::kKeep,
28             0xffff>()
29     );
30     static constexpr GrUserStencilSettings kWrites(
31         GrUserStencilSettings::StaticInit<
32             0xffff,
33             GrUserStencilTest::kAlways,
34             0xffff,
35             GrUserStencilOp::kReplace,
36             GrUserStencilOp::kReplace,
37             0xffff>()
38     );
39     static constexpr GrUserStencilSettings kReadsAndWrites(
40         GrUserStencilSettings::StaticInit<
41             0x8000,
42             GrUserStencilTest::kEqual,
43             0x6000,
44             GrUserStencilOp::kIncWrap,
45             GrUserStencilOp::kInvert,
46             0x77ff>()
47     );
48 
49     static const GrUserStencilSettings* kStencilSettings[] = {
50             &GrUserStencilSettings::kUnused,
51             &kReads,
52             &kWrites,
53             &kReadsAndWrites,
54     };
55     return kStencilSettings[random->nextULessThan(SK_ARRAY_COUNT(kStencilSettings))];
56 }
57 
58 #endif
59