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93 lines
3.1 KiB
C++
93 lines
3.1 KiB
C++
#ifndef Canvas_h
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#define Canvas_h
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#include <LottieCpp/LottieCpp.h>
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#include <memory>
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#include <vector>
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#include <cassert>
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#include <functional>
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namespace lottieRendering {
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class Image {
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public:
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virtual ~Image() = default;
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};
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class Gradient {
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public:
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Gradient(std::vector<lottie::Color> const &colors, std::vector<float> const &locations) :
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_colors(colors),
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_locations(locations) {
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assert(_colors.size() == _locations.size());
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}
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std::vector<lottie::Color> const &colors() const {
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return _colors;
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}
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std::vector<float> const &locations() const {
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return _locations;
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}
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private:
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std::vector<lottie::Color> _colors;
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std::vector<float> _locations;
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};
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enum class BlendMode {
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Normal,
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DestinationIn,
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DestinationOut
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};
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enum class PathCommandType {
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MoveTo,
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LineTo,
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CurveTo,
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Close
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};
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typedef struct {
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PathCommandType type;
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CGPoint points[4];
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} PathCommand;
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typedef std::function<void(std::function<void(PathCommand const &)>)> CanvasPathEnumerator;
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class Canvas {
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public:
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virtual ~Canvas() = default;
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virtual int width() const = 0;
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virtual int height() const = 0;
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virtual std::shared_ptr<Canvas> makeLayer(int width, int height) = 0;
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virtual void saveState() = 0;
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virtual void restoreState() = 0;
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virtual void fillPath(CanvasPathEnumerator const &enumeratePath, lottie::FillRule fillRule, lottie::Color const &color) = 0;
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virtual void linearGradientFillPath(CanvasPathEnumerator const &enumeratePath, lottie::FillRule fillRule, Gradient const &gradient, lottie::Vector2D const &start, lottie::Vector2D const &end) = 0;
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virtual void radialGradientFillPath(CanvasPathEnumerator const &enumeratePath, lottie::FillRule fillRule, Gradient const &gradient, lottie::Vector2D const &startCenter, float startRadius, lottie::Vector2D const &endCenter, float endRadius) = 0;
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virtual void strokePath(CanvasPathEnumerator const &enumeratePath, float lineWidth, lottie::LineJoin lineJoin, lottie::LineCap lineCap, float dashPhase, std::vector<float> const &dashPattern, lottie::Color const &color) = 0;
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virtual void linearGradientStrokePath(CanvasPathEnumerator const &enumeratePath, float lineWidth, lottie::LineJoin lineJoin, lottie::LineCap lineCap, float dashPhase, std::vector<float> const &dashPattern, Gradient const &gradient, lottie::Vector2D const &start, lottie::Vector2D const &end) = 0;
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virtual void radialGradientStrokePath(CanvasPathEnumerator const &enumeratePath, float lineWidth, lottie::LineJoin lineJoin, lottie::LineCap lineCap, float dashPhase, std::vector<float> const &dashPattern, Gradient const &gradient, lottie::Vector2D const &startCenter, float startRadius, lottie::Vector2D const &endCenter, float endRadius) = 0;
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virtual void fill(lottie::CGRect const &rect, lottie::Color const &fillColor) = 0;
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virtual void setBlendMode(BlendMode blendMode) = 0;
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virtual void setAlpha(float alpha) = 0;
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virtual void concatenate(lottie::CATransform3D const &transform) = 0;
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virtual void draw(std::shared_ptr<Canvas> const &other, lottie::CGRect const &rect) = 0;
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};
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}
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#endif
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