V8HTMLCanvasElementCustom.cpp [plain text]
#include "config.h"
#include "V8HTMLCanvasElement.h"
#include "CanvasContextAttributes.h"
#include "CanvasRenderingContext.h"
#include "HTMLCanvasElement.h"
#include "PlatformString.h"
#include "WebGLContextAttributes.h"
#include "V8Binding.h"
#include "V8CanvasRenderingContext2D.h"
#include "V8Node.h"
#include "V8Proxy.h"
#if ENABLE(WEBGL)
#include "V8WebGLRenderingContext.h"
#endif
#include <wtf/MathExtras.h>
namespace WebCore {
v8::Handle<v8::Value> V8HTMLCanvasElement::getContextCallback(const v8::Arguments& args)
{
INC_STATS("DOM.HTMLCanvasElement.context");
v8::Handle<v8::Object> holder = args.Holder();
HTMLCanvasElement* imp = V8HTMLCanvasElement::toNative(holder);
String contextId = toWebCoreString(args[0]);
RefPtr<CanvasContextAttributes> attrs;
#if ENABLE(WEBGL)
if (contextId == "experimental-webgl" || contextId == "webkit-3d") {
attrs = WebGLContextAttributes::create();
WebGLContextAttributes* webGLAttrs = static_cast<WebGLContextAttributes*>(attrs.get());
if (args.Length() > 1 && args[1]->IsObject()) {
v8::Handle<v8::Object> jsAttrs = args[1]->ToObject();
v8::Handle<v8::String> alpha = v8::String::New("alpha");
if (jsAttrs->Has(alpha))
webGLAttrs->setAlpha(jsAttrs->Get(alpha)->BooleanValue());
v8::Handle<v8::String> depth = v8::String::New("depth");
if (jsAttrs->Has(depth))
webGLAttrs->setDepth(jsAttrs->Get(depth)->BooleanValue());
v8::Handle<v8::String> stencil = v8::String::New("stencil");
if (jsAttrs->Has(stencil))
webGLAttrs->setStencil(jsAttrs->Get(stencil)->BooleanValue());
v8::Handle<v8::String> antialias = v8::String::New("antialias");
if (jsAttrs->Has(antialias))
webGLAttrs->setAntialias(jsAttrs->Get(antialias)->BooleanValue());
v8::Handle<v8::String> premultipliedAlpha = v8::String::New("premultipliedAlpha");
if (jsAttrs->Has(premultipliedAlpha))
webGLAttrs->setPremultipliedAlpha(jsAttrs->Get(premultipliedAlpha)->BooleanValue());
v8::Handle<v8::String> preserveDrawingBuffer = v8::String::New("preserveDrawingBuffer");
if (jsAttrs->Has(preserveDrawingBuffer))
webGLAttrs->setPreserveDrawingBuffer(jsAttrs->Get(preserveDrawingBuffer)->BooleanValue());
}
}
#endif
CanvasRenderingContext* result = imp->getContext(contextId, attrs.get());
if (!result)
return v8::Null();
if (result->is2d())
return toV8(static_cast<CanvasRenderingContext2D*>(result), args.GetIsolate());
#if ENABLE(WEBGL)
else if (result->is3d())
return toV8(static_cast<WebGLRenderingContext*>(result), args.GetIsolate());
#endif
ASSERT_NOT_REACHED();
return v8::Null();
}
v8::Handle<v8::Value> V8HTMLCanvasElement::toDataURLCallback(const v8::Arguments& args)
{
v8::Handle<v8::Object> holder = args.Holder();
HTMLCanvasElement* canvas = V8HTMLCanvasElement::toNative(holder);
ExceptionCode ec = 0;
String type = toWebCoreString(args[0]);
double quality;
double* qualityPtr = 0;
if (args.Length() > 1 && args[1]->IsNumber()) {
quality = args[1]->NumberValue();
qualityPtr = &quality;
}
String result = canvas->toDataURL(type, qualityPtr, ec);
V8Proxy::setDOMException(ec, args.GetIsolate());
return v8StringOrUndefined(result);
}
}