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LibGfx: Allow requesting vector graphic frames from ImageDecoder

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Only supported for plugins that set is_vector() to true. This returns
the frames as Gfx::VectorGraphics, which allows painting/rasterizing
them with arbitrary transforms and scales.
This commit is contained in:
MacDue 2023-07-07 22:23:04 +01:00 • committed by Andreas Kling
parent 8784568a36
commit 753cf04be8
3 changed files with 39 additions and 30 deletions
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16
Userland/Libraries/LibGfx/ImageFormats/TinyVGLoader.h
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@ -14,6 +14,7 @@
#include <LibGfx/ImageFormats/ImageDecoder.h>
#include <LibGfx/PaintStyle.h>
#include <LibGfx/Path.h>
#include <LibGfx/VectorGraphic.h>
namespace Gfx {
@ -33,7 +34,7 @@ namespace Gfx {
// Decoder from the "Tiny Vector Graphics" format (v1.0).
// https://tinyvg.tech/download/specification.pdf
class TinyVGDecodedImageData {
class TinyVGDecodedImageData final : public VectorGraphic {
public:
using Style = Variant<Color, NonnullRefPtr<SVGGradientPaintStyle>>;
@ -44,19 +45,19 @@ public:
float stroke_width { 0.0f };
};
ErrorOr<RefPtr<Gfx::Bitmap>> bitmap(IntSize size) const;
IntSize size() const
virtual IntSize intrinsic_size() const override
{
return m_size;
}
virtual void draw_transformed(Painter&, AffineTransform) const override;
ReadonlySpan<DrawCommand> draw_commands() const
{
return m_draw_commands;
}
static ErrorOr<TinyVGDecodedImageData> decode(Stream& stream);
static ErrorOr<NonnullRefPtr<TinyVGDecodedImageData>> decode(Stream& stream);
private:
TinyVGDecodedImageData(IntSize size, Vector<DrawCommand> draw_commands)
@ -71,7 +72,7 @@ private:
struct TinyVGLoadingContext {
ReadonlyBytes data;
OwnPtr<TinyVGDecodedImageData> decoded_image {};
RefPtr<TinyVGDecodedImageData> decoded_image {};
RefPtr<Bitmap> bitmap {};
};
@ -89,6 +90,9 @@ public:
virtual ErrorOr<ImageFrameDescriptor> frame(size_t index, Optional<IntSize> ideal_size = {}) override;
virtual ErrorOr<Optional<ReadonlyBytes>> icc_data() override { return OptionalNone {}; }
virtual bool is_vector() override { return true; }
virtual ErrorOr<VectorImageFrameDescriptor> vector_frame(size_t index) override;
virtual ~TinyVGImageDecoderPlugin() override = default;
private: