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https://github.com/RGBCube/serenity
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1bd2941467
An ImageLoader is a generic interface for loading encoded image data of any supported format. It has an ImageLoaderPlugin internally that does all the work. This patch adds an initial PNGImageLoaderPlugin that knows how to retrieve the size of a PNG, and the bitmap. The API is divided into size() and bitmap() to facilitate geometry-only decoding. This will be useful in places like LibHTML where we need dimensions for layout purposes but can wait with the bitmap until later.
35 lines
862 B
C++
35 lines
862 B
C++
#pragma once
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#include <AK/NonnullRefPtr.h>
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#include <AK/OwnPtr.h>
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#include <AK/RefCounted.h>
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#include <LibDraw/Size.h>
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class GraphicsBitmap;
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class ImageLoaderPlugin {
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public:
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virtual ~ImageLoaderPlugin() {}
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virtual Size size() = 0;
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virtual RefPtr<GraphicsBitmap> bitmap() = 0;
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protected:
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ImageLoaderPlugin() {}
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};
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class ImageLoader : public RefCounted<ImageLoader> {
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public:
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static NonnullRefPtr<ImageLoader> create(const u8* data, size_t size) { return adopt(*new ImageLoader(data, size)); }
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~ImageLoader();
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Size size() const { return m_plugin->size(); }
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int width() const { return size().width(); }
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int height() const { return size().height(); }
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RefPtr<GraphicsBitmap> bitmap() const { return m_plugin->bitmap(); }
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private:
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ImageLoader(const u8*, size_t);
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mutable OwnPtr<ImageLoaderPlugin> m_plugin;
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};
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