1 files changed, 129 insertions, 0 deletions
diff --git a/src/javascript/jsc/bindings/webcore/ImageData.cpp b/src/javascript/jsc/bindings/webcore/ImageData.cpp
new file mode 100644
index 000000000..2e6511bb4
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+++ b/src/javascript/jsc/bindings/webcore/ImageData.cpp
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2008-2021 Apple Inc. All rights reserved.
+ * Copyright (C) 2014 Adobe Systems Incorporated. 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
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "ImageData.h"
+
+#include "JavaScriptCore/JSGenericTypedArrayViewInlines.h"
+#include "JavaScriptCore/GenericTypedArrayViewInlines.h"
+
+#include "wtf/text/TextStream.h"
+
+namespace WebCore {
+using namespace JSC;
+
+static CheckedUint32 computeDataSize(int width, int height)
+{
+    CheckedUint32 checkedDataSize = 4;
+    checkedDataSize *= static_cast<unsigned>(width);
+    checkedDataSize *= static_cast<unsigned>(height);
+    return checkedDataSize;
+}
+
+// PredefinedColorSpace ImageData::computeColorSpace(std::optional<ImageDataSettings> settings, PredefinedColorSpace defaultColorSpace)
+// {
+//     if (settings && settings->colorSpace)
+//         return *settings->colorSpace;
+//     return defaultColorSpace;
+// }
+
+// Ref<ImageData> ImageData::create(PixelBuffer&& pixelBuffer)
+// {
+//     auto colorSpace = toPredefinedColorSpace(pixelBuffer.format().colorSpace);
+//     return adoptRef(*new ImageData(pixelBuffer.size(), pixelBuffer.takeData(), *colorSpace));
+// }
+
+// RefPtr<ImageData> ImageData::create(std::optional<PixelBuffer>&& pixelBuffer)
+// {
+//     if (!pixelBuffer)
+//         return nullptr;
+//     return create(WTFMove(*pixelBuffer));
+// }
+
+ExceptionOr<Ref<ImageData>> ImageData::create(unsigned int sw, unsigned int sh)
+{
+    if (!sw || !sh)
+        return Exception { IndexSizeError };
+
+    auto dataSize = computeDataSize(static_cast<unsigned>(sw), static_cast<unsigned>(sh));
+    if (dataSize.hasOverflowed())
+        return Exception { RangeError, "Cannot allocate a buffer of this size"_s };
+
+    auto byteArray = Uint8ClampedArray::tryCreateUninitialized(dataSize);
+    if (!byteArray) {
+        // FIXME: Does this need to be a "real" out of memory error with setOutOfMemoryError called on it?
+        return Exception { RangeError, "Out of memory"_s };
+    }
+    byteArray->zeroFill();
+
+    // auto colorSpace = computeColorSpace(settings);
+    return adoptRef(*new ImageData(sw, sh, byteArray.releaseNonNull()));
+}
+
+ExceptionOr<Ref<ImageData>> ImageData::create(Ref<Uint8ClampedArray>&& byteArray, unsigned sw, std::optional<unsigned> sh)
+{
+    unsigned length = byteArray->length();
+    if (!length || length % 4)
+        return Exception { InvalidStateError, "Length is not a non-zero multiple of 4"_s };
+
+    length /= 4;
+    if (!sw || length % sw)
+        return Exception { IndexSizeError, "Length is not a multiple of sw"_s };
+
+    unsigned height = length / sw;
+    if (sh && sh.value() != height)
+        return Exception { IndexSizeError, "sh value is not equal to height"_s };
+
+    int width = sw;
+
+    auto dataSize = computeDataSize(width, height);
+    if (dataSize.hasOverflowed() || dataSize != byteArray->length())
+        return Exception { RangeError };
+
+    // auto colorSpace = computeColorSpace(settings);
+    return adoptRef(*new ImageData(width, height, WTFMove(byteArray)));
+}
+
+ImageData::ImageData(int width, int height, Ref<JSC::Uint8ClampedArray>&& data)
+    : m_data(WTFMove(data))
+// , m_colorSpace(colorSpace)
+{
+    m_width = width;
+    m_height = height;
+}
+
+ImageData::~ImageData() = default;
+
+TextStream& operator<<(TextStream& ts, const ImageData& imageData)
+{
+    // Print out the address of the pixel data array
+    return ts << &imageData.data();
+}
+
+}