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Diffstat (limited to 'skia/include/SkUnPreMultiply.h')
-rw-r--r-- | skia/include/SkUnPreMultiply.h | 63 |
1 files changed, 0 insertions, 63 deletions
diff --git a/skia/include/SkUnPreMultiply.h b/skia/include/SkUnPreMultiply.h deleted file mode 100644 index 4bdb980..0000000 --- a/skia/include/SkUnPreMultiply.h +++ /dev/null @@ -1,63 +0,0 @@ -/* - * Copyright (C) 2008 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - - - - -#ifndef SkUnPreMultiply_DEFINED -#define SkUnPreMultiply_DEFINED - -#include "SkColor.h" - -class SkUnPreMultiply { -public: - typedef uint32_t Scale; - - // index this table with alpha [0..255] - static const Scale* GetScaleTable() { - return gTable; - } - - static Scale GetScale(U8CPU alpha) { - SkASSERT(alpha <= 255); - return gTable[alpha]; - } - - /** Usage: - - const Scale* table = SkUnPreMultiply::GetScaleTable(); - - for (...) { - unsigned a = ... - SkUnPreMultiply::Scale scale = table[a]; - - red = SkUnPreMultiply::ApplyScale(scale, red); - ... - // now red is unpremultiplied - } - */ - static U8CPU ApplyScale(Scale scale, U8CPU component) { - SkASSERT(component <= 255); - return (scale * component + (1 << 23)) >> 24; - } - - static SkColor PMColorToColor(SkPMColor c); - -private: - static const uint32_t gTable[256]; -}; - -#endif |