85 lines
2.1 KiB
C++
85 lines
2.1 KiB
C++
/*
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* DrawingTracer.h
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*
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* Created on: 2014-6-15
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* Author: duanyao
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*/
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#ifndef DRAWINGTRACER_H__
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#define DRAWINGTRACER_H__
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#include <functional>
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#include <GfxState.h>
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#include <vector>
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#include <array>
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#include "pdf2htmlEX-config.h"
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#if ENABLE_SVG
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#include <cairo.h>
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#endif
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#include "Param.h"
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namespace pdf2htmlEX
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{
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class DrawingTracer
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{
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public:
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/*
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* The callback to receive drawn event.
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* bbox in device space.
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*/
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// a non-char graphics is drawn
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std::function<void(cairo_t *cairo, double * bbox, int what)> on_non_char_drawn;
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// a char is drawn in the clip area
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std::function<void(cairo_t *cairo, double * bbox)> on_char_drawn;
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// a char is drawn out of/partially in the clip area
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std::function<void(cairo_t *cairo, double * bbox, int pts_visible)> on_char_clipped;
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DrawingTracer(const Param & param);
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virtual ~DrawingTracer();
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void reset(GfxState * state);
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/*
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* A character is drawing
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* x, y: glyph-drawing position, in PDF text object space.
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* width, height: glyph width/height
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*/
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void draw_char(GfxState * state, double x, double y, double width, double height, int inTransparencyGroup);
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/*
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* An image is drawing
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*/
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void draw_image(GfxState * state);
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void update_ctm(GfxState * state, double m11, double m12, double m21, double m22, double m31, double m32);
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void clip(GfxState * state, bool even_odd = false);
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void clip_to_stroke_path(GfxState * state);
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void fill(GfxState * state, bool even_odd = false);
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void stroke(GfxState * state);
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void save();
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void restore();
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private:
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void finish();
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// Following methods operate in user space (just before CTM is applied)
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void do_path(GfxState * state, GfxPath * path);
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void draw_non_char_bbox(GfxState * state, double * bbox, int what);
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void draw_char_bbox(GfxState * state, double * bbox, int inTransparencyGroup);
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// If cairo is available, parameter state is ignored
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void xform_pt(double & x, double & y);
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const Param & param;
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std::vector<double*> ctm_stack;
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#if ENABLE_SVG
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cairo_t * cairo;
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#endif
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};
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} /* namespace pdf2htmlEX */
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#endif /* DRAWINGTRACER_H__ */
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