diff options
author | 2018-03-07 17:02:47 -0500 | |
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committer | 2018-03-07 22:32:20 +0000 | |
commit | 4123223ccc85e4f712495403dd1a2869110fd8c4 (patch) | |
tree | ccb587567bd48f2a1b77885e92f8a0c44649fff2 /include | |
parent | 23d23892cad305117fb8e46bcf8e15c3174c47f4 (diff) |
add TrimPathEffect
Bug: skia:
Change-Id: I453fb81ded4435b33567e9c8a6f3abe9535d687f
Reviewed-on: https://skia-review.googlesource.com/112820
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Diffstat (limited to 'include')
-rw-r--r-- | include/effects/SkTrimPathEffect.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/include/effects/SkTrimPathEffect.h b/include/effects/SkTrimPathEffect.h new file mode 100644 index 0000000000..d40c9e2bbf --- /dev/null +++ b/include/effects/SkTrimPathEffect.h @@ -0,0 +1,36 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTrimPathEffect_DEFINED +#define SkTrimPathEffect_DEFINED + +#include "SkPathEffect.h" + +class SK_API SkTrimPathEffect { +public: + /** + * Take start and stop "t" values (values between 0...1), and return a path that is that + * subset of the original path. + * + * e.g. + * Make(0.5, 1.0) --> return the 2nd half of the path + * Make(0.33333, 0.66667) --> return the middle third of the path + * + * The trim values apply to the entire path, so if it contains several contours, all of them + * are including in the calculation. + * + * startT and stopT must be 0..1 inclusive. If they are outside of that interval, they will + * be pinned to the nearest legal value. If either is NaN, null will be returned. + * + * Note: if startT < stopT, this will return one (logical) segment (even if it is spread + * across multiple contours). If startT > stopT, then this will return 2 logical + * segments: 0...stopT and startT...1 + */ + static sk_sp<SkPathEffect> Make(SkScalar startT, SkScalar stopT); +}; + +#endif |