V8Binding/bindings/V8CanvasPixelArrayCustom.cpp

// Copyright (c) 2009, Google Inc.
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#include "config.h"

#include "v8_binding.h"
#include "v8_custom.h"
#include "v8_proxy.h"

#include "CanvasPixelArray.h"

namespace WebCore {

// Get the specified value from the pixel buffer and return it wrapped as a
// JavaScript Number object to V8. Accesses outside the valid pixel buffer
// range return "undefined".
INDEXED_PROPERTY_GETTER(CanvasPixelArray) {
    INC_STATS("DOM.CanvasPixelArray.IndexedPropertyGetter");
    CanvasPixelArray* pixelBuffer =
        V8Proxy::ToNativeObject<CanvasPixelArray>(
            V8ClassIndex::CANVASPIXELARRAY,
            info.Holder());

    if ((index < 0) || (index >= pixelBuffer->length())) {
        return v8::Undefined();
    }
    unsigned char result;
    if (!pixelBuffer->get(index, result)) {
        return v8::Undefined();
    }
    return v8::Number::New(result);
}


// Set the specified value in the pixel buffer. Accesses outside the valid pixel
// buffer range are silently ignored.
INDEXED_PROPERTY_SETTER(CanvasPixelArray) {
    INC_STATS("DOM.CanvasPixelArray.IndexedPropertySetter");
    CanvasPixelArray* pixelBuffer =
        V8Proxy::ToNativeObject<CanvasPixelArray>(
            V8ClassIndex::CANVASPIXELARRAY,
            info.Holder());

    if ((index >= 0) && (index < pixelBuffer->length())) {
        pixelBuffer->set(index, value->NumberValue());
    }
    return value;
}


}  // namespace WebCore