Implement ImageBitmapOptions resize

third_party/WebKit/Source/core/html/ImageData.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 128 matching lines @@
         return nullptr;
     }
     ASSERT(lengthInPixels && width);
     if (height != lengthInPixels / width) {
         exceptionState.throwDOMException(IndexSizeError, "The input data byte length is not equal to (4 * width * height).");
         return nullptr;
     }
     return new ImageData(IntSize(width, height), data);
 }
 
-ScriptPromise ImageData::createImageBitmap(ScriptState* scriptState, EventTarget& eventTarget, int sx, int sy, int sw, int sh, const ImageBitmapOptions& options, ExceptionState& exceptionState)
+ScriptPromise ImageData::createImageBitmap(ScriptState* scriptState, EventTarget& eventTarget, Optional<IntRect> cropRect, const ImageBitmapOptions& options, ExceptionState& exceptionState)
 {
-    if (!sw || !sh) {
-        exceptionState.throwDOMException(IndexSizeError, String::format("The source %s provided is 0.", sw ? "height" : "width"));
+    if ((cropRect && !ImageBitmap::isSourceSizeValid(cropRect->width(), cropRect->height(), exceptionState))
+        || !ImageBitmap::isSourceSizeValid(bitmapSourceSize().width(), bitmapSourceSize().height(), exceptionState))
         return ScriptPromise();
-    }
     if (data()->bufferBase()->isNeutered()) {
         exceptionState.throwDOMException(InvalidStateError, "The source data has been neutered.");
         return ScriptPromise();
     }
-    return ImageBitmapSource::fulfillImageBitmap(scriptState, ImageBitmap::create(this, IntRect(sx, sy, sw, sh), options));
+    if (!ImageBitmap::isResizeOptionValid(options, exceptionState))
+        return ScriptPromise();
+    return ImageBitmapSource::fulfillImageBitmap(scriptState, ImageBitmap::create(this, cropRect, options));
 }
 
 v8::Local<v8::Object> ImageData::associateWithWrapper(v8::Isolate* isolate, const WrapperTypeInfo* wrapperType, v8::Local<v8::Object> wrapper)
 {
     wrapper = ScriptWrappable::associateWithWrapper(isolate, wrapperType, wrapper);
 
     if (!wrapper.IsEmpty() && m_data.get()) {
         // Create a V8 Uint8ClampedArray object and set the "data" property
         // of the ImageData object to the created v8 object, eliminating the
         // C++ callback when accessing the "data" property.
         v8::Local<v8::Value> pixelArray = toV8(m_data.get(), wrapper, isolate);
         if (pixelArray.IsEmpty() || !v8CallBoolean(wrapper->DefineOwnProperty(isolate->GetCurrentContext(), v8AtomicString(isolate, "data"), pixelArray, v8::ReadOnly)))
             return v8::Local<v8::Object>();
     }
     return wrapper;
 }
 
 ImageData::ImageData(const IntSize& size, DOMUint8ClampedArray* byteArray)
     : m_size(size)
     , m_data(byteArray)
 {
     ASSERT(size.width() >= 0 && size.height() >= 0);
     ASSERT_WITH_SECURITY_IMPLICATION(static_cast<unsigned>(size.width() * size.height() * 4) <= m_data->length());
 }
 
 } // namespace blink