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https://github.com/RGBCube/serenity
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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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@ -29,6 +29,7 @@
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#include <LibWeb/DOM/CanvasRenderingContext2D.h>
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#include <LibWeb/DOM/HTMLCanvasElement.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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@ -175,4 +176,18 @@ void CanvasRenderingContext2D::stroke()
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painter->stroke_path(m_path, m_stroke_style, m_line_width);
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}
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RefPtr<ImageData> CanvasRenderingContext2D::create_image_data(JS::GlobalObject& global_object, int width, int height) const
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{
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return ImageData::create_with_size(global_object, width, height);
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}
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void CanvasRenderingContext2D::put_image_data(const ImageData& image_data, float x, float y)
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{
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auto painter = this->painter();
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if (!painter)
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return;
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painter->blit(Gfx::Point(x, y), image_data.bitmap(), image_data.bitmap().rect());
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}
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}
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@ -71,6 +71,9 @@ public:
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void line_to(float x, float y);
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void stroke();
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RefPtr<ImageData> create_image_data(JS::GlobalObject&, int width, int height) const;
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void put_image_data(const ImageData&, float x, float y);
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private:
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explicit CanvasRenderingContext2D(HTMLCanvasElement&);
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86
Libraries/LibWeb/DOM/ImageData.cpp
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86
Libraries/LibWeb/DOM/ImageData.cpp
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@ -0,0 +1,86 @@
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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 <LibGfx/Bitmap.h>
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#include <LibJS/Runtime/Uint8ClampedArray.h>
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#include <LibWeb/DOM/ImageData.h>
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namespace Web {
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RefPtr<ImageData> ImageData::create_with_size(JS::GlobalObject& global_object, int width, int height)
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{
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if (width <= 0 || height <= 0)
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return nullptr;
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if (width > 16384 || height > 16384)
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return nullptr;
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dbg() << "Creating ImageData with " << width << "x" << height;
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auto* data = JS::Uint8ClampedArray::create(global_object, width * height * 4);
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if (!data)
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return nullptr;
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auto data_handle = JS::make_handle(data);
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auto bitmap = Gfx::Bitmap::create_wrapper(Gfx::BitmapFormat::RGBA32, Gfx::Size(width, height), width * sizeof(u32), (u32*)data->data());
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if (!bitmap)
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return nullptr;
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return adopt(*new ImageData(bitmap.release_nonnull(), move(data_handle)));
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}
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ImageData::ImageData(NonnullRefPtr<Gfx::Bitmap> bitmap, JS::Handle<JS::Uint8ClampedArray> data)
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: m_bitmap(move(bitmap))
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, m_data(move(data))
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{
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}
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ImageData::~ImageData()
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{
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}
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int ImageData::width() const
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{
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return m_bitmap->width();
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}
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int ImageData::height() const
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{
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return m_bitmap->height();
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}
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JS::Uint8ClampedArray* ImageData::data()
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{
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return m_data.cell();
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}
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const JS::Uint8ClampedArray* ImageData::data() const
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{
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return m_data.cell();
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}
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}
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61
Libraries/LibWeb/DOM/ImageData.h
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61
Libraries/LibWeb/DOM/ImageData.h
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@ -0,0 +1,61 @@
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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 <LibGfx/Forward.h>
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#include <LibJS/Heap/Handle.h>
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#include <LibWeb/Bindings/Wrappable.h>
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namespace Web {
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class ImageData
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: public RefCounted<ImageData>
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, public Bindings::Wrappable {
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public:
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using WrapperType = Bindings::ImageDataWrapper;
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static RefPtr<ImageData> create_with_size(JS::GlobalObject&, int width, int height);
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~ImageData();
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int width() const;
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int height() const;
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Gfx::Bitmap& bitmap() { return m_bitmap; }
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const Gfx::Bitmap& bitmap() const { return m_bitmap; }
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JS::Uint8ClampedArray* data();
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const JS::Uint8ClampedArray* data() const;
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private:
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explicit ImageData(NonnullRefPtr<Gfx::Bitmap>, JS::Handle<JS::Uint8ClampedArray>);
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NonnullRefPtr<Gfx::Bitmap> m_bitmap;
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JS::Handle<JS::Uint8ClampedArray> m_data;
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};
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}
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