mirror of
https://github.com/RGBCube/serenity
synced 2025-07-27 02:57:44 +00:00
LibWeb: Add ImageData objects and implement 2D context putImageData()
An ImageData is a wrapper around a Bitmap wrapper around a JS::Uint8ClampedArray.
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10 changed files with 359 additions and 0 deletions
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@ -33,8 +33,10 @@
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#include <LibJS/Runtime/Value.h>
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#include <LibWeb/Bindings/CanvasRenderingContext2DWrapper.h>
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#include <LibWeb/Bindings/HTMLImageElementWrapper.h>
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#include <LibWeb/Bindings/ImageDataWrapper.h>
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#include <LibWeb/DOM/CanvasRenderingContext2D.h>
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#include <LibWeb/DOM/HTMLImageElement.h>
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#include <LibWeb/DOM/ImageData.h>
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namespace Web {
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namespace Bindings {
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@ -62,6 +64,9 @@ CanvasRenderingContext2DWrapper::CanvasRenderingContext2DWrapper(CanvasRendering
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put_native_function("moveTo", move_to, 0);
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put_native_function("lineTo", line_to, 0);
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put_native_function("createImageData", create_image_data, 2);
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put_native_function("putImageData", put_image_data, 3);
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put_native_property("lineWidth", line_width_getter, line_width_setter);
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}
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@ -235,5 +240,37 @@ JS::Value CanvasRenderingContext2DWrapper::line_to(JS::Interpreter& interpreter)
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return JS::js_undefined();
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}
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JS::Value CanvasRenderingContext2DWrapper::create_image_data(JS::Interpreter& interpreter)
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{
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auto* impl = impl_from(interpreter);
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if (!impl)
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return {};
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i32 width = interpreter.argument(0).to_i32();
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i32 height = interpreter.argument(1).to_i32();
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auto image_data = impl->create_image_data(interpreter.global_object(), width, height);
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return wrap(interpreter.heap(), *image_data);
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}
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JS::Value CanvasRenderingContext2DWrapper::put_image_data(JS::Interpreter& interpreter)
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{
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auto* impl = impl_from(interpreter);
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if (!impl)
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return {};
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auto* image_data_object = interpreter.argument(0).to_object(interpreter.heap());
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if (!image_data_object)
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return {};
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if (StringView(image_data_object->class_name()) != "ImageDataWrapper") {
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return interpreter.throw_exception<JS::TypeError>("putImageData called with non-ImageData");
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}
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auto& image_data = static_cast<ImageDataWrapper*>(image_data_object)->impl();
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auto x = interpreter.argument(1).to_double();
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auto y = interpreter.argument(2).to_double();
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impl->put_image_data(image_data, x, y);
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return JS::js_undefined();
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}
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}
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}
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@ -59,6 +59,9 @@ private:
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static JS::Value move_to(JS::Interpreter&);
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static JS::Value line_to(JS::Interpreter&);
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static JS::Value create_image_data(JS::Interpreter&);
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static JS::Value put_image_data(JS::Interpreter&);
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NonnullRefPtr<CanvasRenderingContext2D> m_impl;
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};
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95
Libraries/LibWeb/Bindings/ImageDataWrapper.cpp
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95
Libraries/LibWeb/Bindings/ImageDataWrapper.cpp
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@ -0,0 +1,95 @@
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/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/Function.h>
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#include <LibJS/Interpreter.h>
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#include <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Uint8ClampedArray.h>
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#include <LibWeb/Bindings/ImageDataWrapper.h>
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#include <LibWeb/DOM/ImageData.h>
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namespace Web {
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namespace Bindings {
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ImageDataWrapper* wrap(JS::Heap& heap, ImageData& event)
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{
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return static_cast<ImageDataWrapper*>(wrap_impl(heap, event));
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}
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ImageDataWrapper::ImageDataWrapper(ImageData& impl)
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: Wrapper(*interpreter().global_object().object_prototype())
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, m_impl(impl)
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{
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put_native_property("width", width_getter, nullptr);
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put_native_property("height", height_getter, nullptr);
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put_native_property("data", data_getter, nullptr);
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}
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ImageDataWrapper::~ImageDataWrapper()
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{
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}
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static ImageData* impl_from(JS::Interpreter& interpreter)
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{
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auto* this_object = interpreter.this_value().to_object(interpreter.heap());
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if (!this_object) {
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ASSERT_NOT_REACHED();
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return nullptr;
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}
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if (StringView("ImageDataWrapper") != this_object->class_name()) {
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interpreter.throw_exception<JS::TypeError>("That's not an ImageDataWrapper, bro.");
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return nullptr;
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}
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return &static_cast<ImageDataWrapper*>(this_object)->impl();
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}
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JS::Value ImageDataWrapper::width_getter(JS::Interpreter& interpreter)
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{
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auto* impl = impl_from(interpreter);
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if (!impl)
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return {};
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return JS::Value(impl->width());
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}
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JS::Value ImageDataWrapper::height_getter(JS::Interpreter& interpreter)
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{
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auto* impl = impl_from(interpreter);
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if (!impl)
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return {};
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return JS::Value(impl->height());
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}
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JS::Value ImageDataWrapper::data_getter(JS::Interpreter& interpreter)
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{
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auto* impl = impl_from(interpreter);
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if (!impl)
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return {};
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return impl->data();
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}
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}
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}
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55
Libraries/LibWeb/Bindings/ImageDataWrapper.h
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55
Libraries/LibWeb/Bindings/ImageDataWrapper.h
Normal file
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@ -0,0 +1,55 @@
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/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <LibWeb/Bindings/Wrapper.h>
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namespace Web {
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namespace Bindings {
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class ImageDataWrapper : public Wrapper {
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public:
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explicit ImageDataWrapper(ImageData&);
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virtual ~ImageDataWrapper() override;
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ImageData& impl() { return m_impl; }
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const ImageData& impl() const { return m_impl; }
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private:
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virtual const char* class_name() const override { return "ImageDataWrapper"; }
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static JS::Value width_getter(JS::Interpreter&);
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static JS::Value height_getter(JS::Interpreter&);
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static JS::Value data_getter(JS::Interpreter&);
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NonnullRefPtr<ImageData> m_impl;
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};
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ImageDataWrapper* wrap(JS::Heap&, ImageData&);
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}
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}
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