| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "include/core/SkPaint.h" |
| #include "src/core/SkXfermodeInterpretation.h" |
| |
| static bool just_solid_color(const SkPaint& p) { |
| return SK_AlphaOPAQUE == p.getAlpha() && !p.getColorFilter() && !p.getShader(); |
| } |
| |
| SkXfermodeInterpretation SkInterpretXfermode(const SkPaint& paint, bool dstIsOpaque) { |
| switch (paint.getBlendMode()) { |
| case SkBlendMode::kSrcOver: |
| return kSrcOver_SkXfermodeInterpretation; |
| case SkBlendMode::kSrc: |
| if (just_solid_color(paint)) { |
| return kSrcOver_SkXfermodeInterpretation; |
| } |
| return kNormal_SkXfermodeInterpretation; |
| case SkBlendMode::kDst: |
| return kSkipDrawing_SkXfermodeInterpretation; |
| case SkBlendMode::kDstOver: |
| if (dstIsOpaque) { |
| return kSkipDrawing_SkXfermodeInterpretation; |
| } |
| return kNormal_SkXfermodeInterpretation; |
| case SkBlendMode::kSrcIn: |
| if (dstIsOpaque && just_solid_color(paint)) { |
| return kSrcOver_SkXfermodeInterpretation; |
| } |
| return kNormal_SkXfermodeInterpretation; |
| case SkBlendMode::kDstIn: |
| if (just_solid_color(paint)) { |
| return kSkipDrawing_SkXfermodeInterpretation; |
| } |
| return kNormal_SkXfermodeInterpretation; |
| default: |
| return kNormal_SkXfermodeInterpretation; |
| } |
| } |