jcgregorio | 5e44b00 | 2014-10-27 10:27:01 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014 Google Inc. |
| 3 | * |
| 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 <v8.h> |
| 10 | |
| 11 | #include "Global.h" |
| 12 | #include "DrawingMethods.h" |
| 13 | #include "Path2D.h" |
| 14 | #include "SkCanvas.h" |
| 15 | #include "SkPaint.h" |
| 16 | |
| 17 | |
| 18 | DrawingMethods* DrawingMethods::Unwrap(v8::Handle<v8::Object> obj) { |
| 19 | v8::Handle<v8::External> field = v8::Handle<v8::External>::Cast(obj->GetInternalField(0)); |
| 20 | void* ptr = field->Value(); |
| 21 | return static_cast<DrawingMethods*>(ptr); |
| 22 | } |
| 23 | |
| 24 | |
| 25 | void DrawingMethods::Save(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| 26 | DrawingMethods* drawingMethods = Unwrap(args.This()); |
| 27 | SkCanvas* canvas = drawingMethods->getCanvas(); |
| 28 | if (NULL == canvas) { |
| 29 | return; |
| 30 | } |
| 31 | |
| 32 | canvas->save(); |
| 33 | } |
| 34 | |
| 35 | void DrawingMethods::Restore(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| 36 | DrawingMethods* drawingMethods = Unwrap(args.This()); |
| 37 | SkCanvas* canvas = drawingMethods->getCanvas(); |
| 38 | if (NULL == canvas) { |
| 39 | return; |
| 40 | } |
| 41 | |
| 42 | canvas->restore(); |
| 43 | } |
| 44 | |
| 45 | void DrawingMethods::Rotate(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| 46 | DrawingMethods* drawingMethods = Unwrap(args.This()); |
| 47 | SkCanvas* canvas = drawingMethods->getCanvas(); |
| 48 | if (NULL == canvas) { |
| 49 | return; |
| 50 | } |
| 51 | |
| 52 | if (args.Length() != 1) { |
| 53 | args.GetIsolate()->ThrowException( |
| 54 | v8::String::NewFromUtf8( |
| 55 | args.GetIsolate(), "Error: 1 arguments required.")); |
| 56 | return; |
| 57 | } |
| 58 | double angle = args[0]->NumberValue(); |
| 59 | canvas->rotate(SkRadiansToDegrees(angle)); |
| 60 | } |
| 61 | |
| 62 | void DrawingMethods::Translate(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| 63 | DrawingMethods* drawingMethods = Unwrap(args.This()); |
| 64 | SkCanvas* canvas = drawingMethods->getCanvas(); |
| 65 | if (NULL == canvas) { |
| 66 | return; |
| 67 | } |
| 68 | |
| 69 | if (args.Length() != 2) { |
| 70 | args.GetIsolate()->ThrowException( |
| 71 | v8::String::NewFromUtf8( |
| 72 | args.GetIsolate(), "Error: 2 arguments required.")); |
| 73 | return; |
| 74 | } |
| 75 | double dx = args[0]->NumberValue(); |
| 76 | double dy = args[1]->NumberValue(); |
| 77 | canvas->translate(SkDoubleToScalar(dx), SkDoubleToScalar(dy)); |
| 78 | } |
| 79 | |
| 80 | void DrawingMethods::ResetTransform(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| 81 | DrawingMethods* drawingMethods = Unwrap(args.This()); |
| 82 | SkCanvas* canvas = drawingMethods->getCanvas(); |
| 83 | if (NULL == canvas) { |
| 84 | return; |
| 85 | } |
| 86 | |
| 87 | canvas->resetMatrix(); |
| 88 | } |
| 89 | |
| 90 | void DrawingMethods::DrawPath(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| 91 | DrawingMethods* drawingMethods = Unwrap(args.This()); |
| 92 | SkCanvas* canvas = drawingMethods->getCanvas(); |
| 93 | if (NULL == canvas) { |
| 94 | return; |
| 95 | } |
| 96 | |
| 97 | if (args.Length() != 1) { |
| 98 | args.GetIsolate()->ThrowException( |
| 99 | v8::String::NewFromUtf8( |
| 100 | args.GetIsolate(), "Error: 1 argument required.")); |
| 101 | return; |
| 102 | } |
| 103 | |
| 104 | v8::Handle<v8::External> field = v8::Handle<v8::External>::Cast( |
| 105 | args[0]->ToObject()->GetInternalField(0)); |
| 106 | void* ptr = field->Value(); |
| 107 | Path2D* path = static_cast<Path2D*>(ptr); |
| 108 | if (NULL == path) { |
| 109 | return; |
| 110 | } |
| 111 | // TODO(jcgregorio) Add support for Paint2D parameter after Paint2D is |
| 112 | // implemented. |
| 113 | SkPaint fillStyle; |
| 114 | fillStyle.setColor(SK_ColorBLACK); |
| 115 | fillStyle.setAntiAlias(true); |
| 116 | fillStyle.setStyle(SkPaint::kFill_Style); |
jcgregorio | e001da2 | 2014-10-29 05:33:27 -0700 | [diff] [blame^] | 117 | canvas->drawPath(*(path->path()), fillStyle); |
jcgregorio | 5e44b00 | 2014-10-27 10:27:01 -0700 | [diff] [blame] | 118 | } |
| 119 | |
| 120 | |
| 121 | void DrawingMethods::GetWidth(v8::Local<v8::String> name, |
| 122 | const v8::PropertyCallbackInfo<v8::Value>& info) { |
| 123 | DrawingMethods* drawingMethods = Unwrap(info.This()); |
| 124 | SkCanvas* canvas = drawingMethods->getCanvas(); |
| 125 | if (NULL == canvas) { |
| 126 | return; |
| 127 | } |
| 128 | |
| 129 | info.GetReturnValue().Set( |
| 130 | v8::Int32::New( |
| 131 | drawingMethods->fGlobal->getIsolate(), canvas->imageInfo().width())); |
| 132 | } |
| 133 | |
| 134 | void DrawingMethods::GetHeight(v8::Local<v8::String> name, |
| 135 | const v8::PropertyCallbackInfo<v8::Value>& info) { |
| 136 | DrawingMethods* drawingMethods = Unwrap(info.This()); |
| 137 | SkCanvas* canvas = drawingMethods->getCanvas(); |
| 138 | if (NULL == canvas) { |
| 139 | return; |
| 140 | } |
| 141 | |
| 142 | info.GetReturnValue().Set( |
| 143 | v8::Int32::New( |
| 144 | drawingMethods->fGlobal->getIsolate(), canvas->imageInfo().height())); |
| 145 | } |
| 146 | |
| 147 | #define ADD_METHOD(name, fn) \ |
| 148 | tmpl->Set(v8::String::NewFromUtf8( \ |
| 149 | fGlobal->getIsolate(), name, \ |
| 150 | v8::String::kInternalizedString), \ |
| 151 | v8::FunctionTemplate::New(fGlobal->getIsolate(), fn)) |
| 152 | |
| 153 | void DrawingMethods::addAttributesAndMethods(v8::Handle<v8::ObjectTemplate> tmpl) { |
| 154 | v8::HandleScope scope(fGlobal->getIsolate()); |
| 155 | |
| 156 | // Add accessors for each of the fields of the context object. |
| 157 | tmpl->SetAccessor(v8::String::NewFromUtf8( |
| 158 | fGlobal->getIsolate(), "width", v8::String::kInternalizedString), |
| 159 | GetWidth); |
| 160 | tmpl->SetAccessor(v8::String::NewFromUtf8( |
| 161 | fGlobal->getIsolate(), "height", v8::String::kInternalizedString), |
| 162 | GetHeight); |
| 163 | |
| 164 | // Add methods. |
| 165 | ADD_METHOD("save", Save); |
| 166 | ADD_METHOD("restore", Restore); |
| 167 | ADD_METHOD("rotate", Rotate); |
| 168 | ADD_METHOD("translate", Translate); |
| 169 | ADD_METHOD("resetTransform", ResetTransform); |
| 170 | |
| 171 | ADD_METHOD("drawPath", DrawPath); |
| 172 | } |