Initial Commit

node_modules/canvas/src/CanvasGradient.cc

@@ -0,0 +1,123 @@
+// Copyright (c) 2010 LearnBoost <tj@learnboost.com>
+
+#include "CanvasGradient.h"
+
+#include "Canvas.h"
+#include "color.h"
+
+using namespace v8;
+
+Nan::Persistent<FunctionTemplate> Gradient::constructor;
+
+/*
+ * Initialize CanvasGradient.
+ */
+
+void
+Gradient::Initialize(Nan::ADDON_REGISTER_FUNCTION_ARGS_TYPE target) {
+  Nan::HandleScope scope;
+
+  // Constructor
+  Local<FunctionTemplate> ctor = Nan::New<FunctionTemplate>(Gradient::New);
+  constructor.Reset(ctor);
+  ctor->InstanceTemplate()->SetInternalFieldCount(1);
+  ctor->SetClassName(Nan::New("CanvasGradient").ToLocalChecked());
+
+  // Prototype
+  Nan::SetPrototypeMethod(ctor, "addColorStop", AddColorStop);
+  Local<Context> ctx = Nan::GetCurrentContext();
+  Nan::Set(target,
+           Nan::New("CanvasGradient").ToLocalChecked(),
+           ctor->GetFunction(ctx).ToLocalChecked());
+}
+
+/*
+ * Initialize a new CanvasGradient.
+ */
+
+NAN_METHOD(Gradient::New) {
+  if (!info.IsConstructCall()) {
+    return Nan::ThrowTypeError("Class constructors cannot be invoked without 'new'");
+  }
+
+  // Linear
+  if (4 == info.Length()) {
+    Gradient *grad = new Gradient(
+        Nan::To<double>(info[0]).FromMaybe(0)
+      , Nan::To<double>(info[1]).FromMaybe(0)
+      , Nan::To<double>(info[2]).FromMaybe(0)
+      , Nan::To<double>(info[3]).FromMaybe(0));
+    grad->Wrap(info.This());
+    info.GetReturnValue().Set(info.This());
+    return;
+  }
+
+  // Radial
+  if (6 == info.Length()) {
+    Gradient *grad = new Gradient(
+        Nan::To<double>(info[0]).FromMaybe(0)
+      , Nan::To<double>(info[1]).FromMaybe(0)
+      , Nan::To<double>(info[2]).FromMaybe(0)
+      , Nan::To<double>(info[3]).FromMaybe(0)
+      , Nan::To<double>(info[4]).FromMaybe(0)
+      , Nan::To<double>(info[5]).FromMaybe(0));
+    grad->Wrap(info.This());
+    info.GetReturnValue().Set(info.This());
+    return;
+  }
+
+  return Nan::ThrowTypeError("invalid arguments");
+}
+
+/*
+ * Add color stop.
+ */
+
+NAN_METHOD(Gradient::AddColorStop) {
+  if (!info[0]->IsNumber())
+    return Nan::ThrowTypeError("offset required");
+  if (!info[1]->IsString())
+    return Nan::ThrowTypeError("color string required");
+
+  Gradient *grad = Nan::ObjectWrap::Unwrap<Gradient>(info.This());
+  short ok;
+  Nan::Utf8String str(info[1]);
+  uint32_t rgba = rgba_from_string(*str, &ok);
+
+  if (ok) {
+    rgba_t color = rgba_create(rgba);
+    cairo_pattern_add_color_stop_rgba(
+        grad->pattern()
+      , Nan::To<double>(info[0]).FromMaybe(0)
+      , color.r
+      , color.g
+      , color.b
+      , color.a);
+  } else {
+    return Nan::ThrowTypeError("parse color failed");
+  }
+}
+
+/*
+ * Initialize linear gradient.
+ */
+
+Gradient::Gradient(double x0, double y0, double x1, double y1) {
+  _pattern = cairo_pattern_create_linear(x0, y0, x1, y1);
+}
+
+/*
+ * Initialize radial gradient.
+ */
+
+Gradient::Gradient(double x0, double y0, double r0, double x1, double y1, double r1) {
+  _pattern = cairo_pattern_create_radial(x0, y0, r0, x1, y1, r1);
+}
+
+/*
+ * Destroy the pattern.
+ */
+
+Gradient::~Gradient() {
+  cairo_pattern_destroy(_pattern);
+}