1 
2 /*
3  * Copyright 2016 Google Inc.
4  *
5  * Use of this source code is governed by a BSD-style license that can be
6  * found in the LICENSE file.
7  */
8 
9 #include "SkColorSpaceXformer.h"
10 #include "SkLights.h"
11 #include "SkReadBuffer.h"
12 
13 sk_sp<SkLights> SkLights::MakeFromBuffer(SkReadBuffer& buf) {
14     Builder builder;
15 
16     SkColor3f ambColor;
17     if (!buf.readScalarArray(&ambColor.fX, 3)) {
18         return nullptr;
19     }
20 
21     builder.setAmbientLightColor(ambColor);
22 
23     int numLights = buf.readInt();
24 
25     for (int l = 0; l < numLights; ++l) {
26         bool isPoint = buf.readBool();
27 
28         SkColor3f color;
29         if (!buf.readScalarArray(&color.fX, 3)) {
30             return nullptr;
31         }
32 
33         SkVector3 dirOrPos;
34         if (!buf.readScalarArray(&dirOrPos.fX, 3)) {
35             return nullptr;
36         }
37 
38         if (isPoint) {
39             SkScalar intensity;
40             intensity = buf.readScalar();
41             Light light = Light::MakePoint(color, dirOrPos, intensity);
42             builder.add(light);
43         } else {
44             Light light = Light::MakeDirectional(color, dirOrPos);
45             builder.add(light);
46         }
47     }
48 
49     return builder.finish();
50 }
51 
52 static SkColor3f xform_color(const SkColor3f& color, SkColorSpaceXformer* xformer) {
53     SkColor origColor = SkColorSetARGB(0xFF,
54                                        SkScalarRoundToInt(color.fX),
55                                        SkScalarRoundToInt(color.fY),
56                                        SkScalarRoundToInt(color.fZ));
57     SkColor xformedColor = xformer->apply(origColor);
58     return SkColor3f::Make(SkIntToScalar(SkGetPackedR32(xformedColor)),
59                            SkIntToScalar(SkGetPackedG32(xformedColor)),
60                            SkIntToScalar(SkGetPackedB32(xformedColor)));
61 }
62 
63 sk_sp<SkLights> SkLights::makeColorSpace(SkColorSpaceXformer* xformer) const {
64     SkLights::Builder builder;
65     for (int i = 0; i < this->numLights(); i++) {
66         Light light(fLights[i].type(), xform_color(fLights[i].color(), xformer),
67                     fLights[i].fDirOrPos, fLights[i].fIntensity);
68         builder.add(light);
69     }
70     builder.setAmbientLightColor(xform_color(fAmbientLightColor, xformer));
71     return builder.finish();
72 }
73 
74 void SkLights::flatten(SkWriteBuffer& buf) const {
75     buf.writeScalarArray(&this->ambientLightColor().fX, 3);
76 
77     buf.writeInt(this->numLights());
78     for (int l = 0; l < this->numLights(); ++l) {
79         const Light& light = this->light(l);
80 
81         bool isPoint = Light::kPoint_LightType == light.type();
82 
83         buf.writeBool(isPoint);
84         buf.writeScalarArray(&light.color().fX, 3);
85         buf.writeScalarArray(&light.dir().fX, 3);
86 
87         if (isPoint) {
88             buf.writeScalar(light.intensity());
89         }
90     }
91 }
92