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LibGfx: Lazily load TinyVG image data

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This matches the behavior of other decoders, and ensures just getting
the size (e.g. for the `file` command) does not read the whole file.
This commit is contained in:
MacDue 2023-07-08 03:29:51 +01:00 • committed by Andreas Kling
parent 753cf04be8
commit 57c81c1719
2 changed files with 78 additions and 19 deletions
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11
Userland/Libraries/LibGfx/ImageFormats/TinyVGLoader.h
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@ -34,6 +34,8 @@ namespace Gfx {
// Decoder from the "Tiny Vector Graphics" format (v1.0).
// https://tinyvg.tech/download/specification.pdf
struct TinyVGHeader;
class TinyVGDecodedImageData final : public VectorGraphic {
public:
using Style = Variant<Color, NonnullRefPtr<SVGGradientPaintStyle>>;
@ -58,6 +60,7 @@ public:
}
static ErrorOr<NonnullRefPtr<TinyVGDecodedImageData>> decode(Stream& stream);
static ErrorOr<NonnullRefPtr<TinyVGDecodedImageData>> decode(Stream& stream, TinyVGHeader const& header);
private:
TinyVGDecodedImageData(IntSize size, Vector<DrawCommand> draw_commands)
@ -70,11 +73,7 @@ private:
Vector<DrawCommand> m_draw_commands;
};
struct TinyVGLoadingContext {
ReadonlyBytes data;
RefPtr<TinyVGDecodedImageData> decoded_image {};
RefPtr<Bitmap> bitmap {};
};
struct TinyVGLoadingContext;
class TinyVGImageDecoderPlugin final : public ImageDecoderPlugin {
public:
@ -98,7 +97,7 @@ public:
private:
TinyVGImageDecoderPlugin(ReadonlyBytes);
TinyVGLoadingContext m_context;
NonnullOwnPtr<TinyVGLoadingContext> m_context;
};
}