gfx/skia/trunk/src/core/SkPaintPriv.cpp@deefc01c0e14
gfx/skia/trunk/src/core/SkPaintPriv.cpp
Thu, 15 Jan 2015 21:03:48 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 21:03:48 +0100
- branch
- TOR_BUG_9701
- changeset 11
- deefc01c0e14
- permissions
- -rw-r--r--
Integrate friendly tips from Tor colleagues to make (or not) 4.5 alpha 3;
This includes removal of overloaded (but unused) methods, and addition of
a overlooked call to DataStruct::SetData(nsISupports, uint32_t, bool.)
1 /*
2 * Copyright 2013 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 */
8 #include "SkPaintPriv.h"
10 #include "SkBitmap.h"
11 #include "SkColorFilter.h"
12 #include "SkPaint.h"
13 #include "SkShader.h"
15 bool isPaintOpaque(const SkPaint* paint,
16 const SkBitmap* bmpReplacesShader) {
17 // TODO: SkXfermode should have a virtual isOpaque method, which would
18 // make it possible to test modes that do not have a Coeff representation.
20 if (!paint) {
21 return bmpReplacesShader ? bmpReplacesShader->isOpaque() : true;
22 }
24 SkXfermode::Coeff srcCoeff, dstCoeff;
25 if (SkXfermode::AsCoeff(paint->getXfermode(), &srcCoeff, &dstCoeff)){
26 if (SkXfermode::kDA_Coeff == srcCoeff || SkXfermode::kDC_Coeff == srcCoeff ||
27 SkXfermode::kIDA_Coeff == srcCoeff || SkXfermode::kIDC_Coeff == srcCoeff) {
28 return false;
29 }
30 switch (dstCoeff) {
31 case SkXfermode::kZero_Coeff:
32 return true;
33 case SkXfermode::kISA_Coeff:
34 if (paint->getAlpha() != 255) {
35 break;
36 }
37 if (bmpReplacesShader) {
38 if (!bmpReplacesShader->isOpaque()) {
39 break;
40 }
41 } else if (paint->getShader() && !paint->getShader()->isOpaque()) {
42 break;
43 }
44 if (paint->getColorFilter() &&
45 ((paint->getColorFilter()->getFlags() &
46 SkColorFilter::kAlphaUnchanged_Flag) == 0)) {
47 break;
48 }
49 return true;
50 case SkXfermode::kSA_Coeff:
51 if (paint->getAlpha() != 0) {
52 break;
53 }
54 if (paint->getColorFilter() &&
55 ((paint->getColorFilter()->getFlags() &
56 SkColorFilter::kAlphaUnchanged_Flag) == 0)) {
57 break;
58 }
59 return true;
60 case SkXfermode::kSC_Coeff:
61 if (paint->getColor() != 0) { // all components must be 0
62 break;
63 }
64 if (bmpReplacesShader || paint->getShader()) {
65 break;
66 }
67 if (paint->getColorFilter() && (
68 (paint->getColorFilter()->getFlags() &
69 SkColorFilter::kAlphaUnchanged_Flag) == 0)) {
70 break;
71 }
72 return true;
73 default:
74 break;
75 }
76 }
77 return false;
78 }
