c0bd9f9fe5
Current strategy: everything from the top
Things to look at first are the manual changes:
- added tools/rewrite_includes.py
- removed -Idirectives from BUILD.gn
- various compile.sh simplifications
- tweak tools/embed_resources.py
- update gn/find_headers.py to write paths from the top
- update gn/gn_to_bp.py SkUserConfig.h layout
so that #include "include/config/SkUserConfig.h" always
gets the header we want.
No-Presubmit: true
Change-Id: I73a4b181654e0e38d229bc456c0d0854bae3363e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/209706
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
57 lines
1.1 KiB
C++
57 lines
1.1 KiB
C++
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/*
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* Copyright 2008 The Android Open Source Project
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkUnPreMultiply_DEFINED
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#define SkUnPreMultiply_DEFINED
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#include "include/core/SkColor.h"
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class SK_API SkUnPreMultiply {
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public:
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typedef uint32_t Scale;
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// index this table with alpha [0..255]
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static const Scale* GetScaleTable() {
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return gTable;
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}
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static Scale GetScale(U8CPU alpha) {
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SkASSERT(alpha <= 255);
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return gTable[alpha];
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}
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/** Usage:
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const Scale* table = SkUnPreMultiply::GetScaleTable();
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for (...) {
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unsigned a = ...
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SkUnPreMultiply::Scale scale = table[a];
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red = SkUnPreMultiply::ApplyScale(scale, red);
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...
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// now red is unpremultiplied
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}
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*/
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static U8CPU ApplyScale(Scale scale, U8CPU component) {
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SkASSERT(component <= 255);
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return (scale * component + (1 << 23)) >> 24;
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}
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static SkColor PMColorToColor(SkPMColor c);
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private:
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static const uint32_t gTable[256];
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};
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#endif
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