mirror of
https://github.com/pdf2htmlEX/pdf2htmlEX.git
synced 2024-12-22 04:50:09 +00:00
purge css draw
This commit is contained in:
Lu Wang
parent
80b8e1f5de
commit
ffa7ead922
@ -50,16 +50,6 @@ public:
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double originX, double originY,
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CharCode code, int nBytes, Unicode *u, int uLen);
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virtual void stroke(GfxState *state) {
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if(!html_renderer->can_stroke(state))
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SplashOutputDev::stroke(state);
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}
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virtual void fill(GfxState *state) {
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if(!html_renderer->can_fill(state))
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SplashOutputDev::fill(state);
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}
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//for proof
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void beginTextObject(GfxState *state);
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void beginString(GfxState *state, GooString * str);
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@ -139,17 +139,13 @@ public:
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GfxImageColorMap *maskColorMap,
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GBool maskInterpolate);
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virtual void stroke(GfxState *state); ////{ css_do_path(state, false); }
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virtual void fill(GfxState *state); ////{ css_do_path(state, true); }
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virtual void stroke(GfxState *state);
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virtual void fill(GfxState *state);
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virtual void eoFill(GfxState *state);
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virtual GBool axialShadedFill(GfxState *state, GfxAxialShading *shading, double tMin, double tMax);
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virtual void processLink(AnnotLink * al);
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/* capacity test */
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bool can_stroke(GfxState *state) { return false; } ////{ return css_do_path(state, false, true); }
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bool can_fill(GfxState *state) { return false; } ////{ return css_do_path(state, true, true); }
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/*
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* Covered text handling.
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*/
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@ -219,29 +215,6 @@ protected:
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// make sure the current HTML style consistent with PDF
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void prepare_text_line(GfxState * state);
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#if 0 //disable CSS drawing
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////////////////////////////////////////////////////
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// CSS drawing
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////////////////////////////////////////////////////
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/*
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* test_only is for capacity check
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*/
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bool css_do_path(GfxState *state, bool fill, bool test_only = false);
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/*
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* coordinates are to transformed by state->getCTM()
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* (x,y) should be the bottom-left corner INCLUDING border
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* w,h should be the metrics WITHOUT border
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*
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* line_color & fill_color may be specified as nullptr to indicate none
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* style_function & style_function_data may be provided to provide more styles
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*/
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void css_draw_rectangle(double x, double y, double w, double h, const double * tm,
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double * line_width_array, int line_width_count,
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const GfxRGB * line_color, const GfxRGB * fill_color,
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void (*style_function)(void *, std::ostream &) = nullptr, void * style_function_data = nullptr );
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#endif //disable CSS drawing
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////////////////////////////////////////////////////
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// PDF stuffs
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////////////////////////////////////////////////////
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@ -62,393 +62,4 @@ GBool HTMLRenderer::axialShadedFill(GfxState *state, GfxAxialShading *shading, d
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return true;
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}
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#if 0 //disable css drawing
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static bool is_horizontal_line(GfxSubpath * path)
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{
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return ((path->getNumPoints() == 2)
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&& (!path->getCurve(1))
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&& (equal(path->getY(0), path->getY(1))));
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}
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static bool is_vertical_line(GfxSubpath * path)
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{
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return ((path->getNumPoints() == 2)
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&& (!path->getCurve(1))
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&& (equal(path->getX(0), path->getX(1))));
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}
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static bool is_rectangle(GfxSubpath * path)
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{
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if (!(((path->getNumPoints() != 4) && (path->isClosed()))
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|| ((path->getNumPoints() == 5)
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&& equal(path->getX(0), path->getX(4))
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&& equal(path->getY(0), path->getY(4)))))
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return false;
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for(int i = 1; i < path->getNumPoints(); ++i)
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if(path->getCurve(i))
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return false;
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return (equal(path->getY(0), path->getY(1))
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&& equal(path->getX(1), path->getX(2))
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&& equal(path->getY(2), path->getY(3))
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&& equal(path->getX(3), path->getX(0)))
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|| (equal(path->getX(0), path->getX(1))
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&& equal(path->getY(1), path->getY(2))
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&& equal(path->getX(2), path->getX(3))
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&& equal(path->getY(3), path->getY(0)));
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}
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static void get_shading_bbox(GfxState * state, GfxShading * shading,
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double & x1, double & y1, double & x2, double & y2)
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{
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// from SplashOutputDev.cc in poppler
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if(shading->getHasBBox())
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{
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shading->getBBox(&x1, &y1, &x2, &y2);
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}
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else
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{
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state->getClipBBox(&x1, &y1, &x2, &y2);
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Matrix ctm, ictm;
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state->getCTM(&ctm);
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ctm.invertTo(&ictm);
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double x[4], y[4];
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ictm.transform(x1, y1, &x[0], &y[0]);
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ictm.transform(x2, y1, &x[1], &y[1]);
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ictm.transform(x1, y2, &x[2], &y[2]);
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ictm.transform(x2, y2, &x[3], &y[3]);
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x1 = x2 = x[0];
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y1 = y2 = y[0];
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for(int i = 1; i < 4; ++i)
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{
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x1 = min<double>(x1, x[i]);
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y1 = min<double>(y1, y[i]);
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x2 = max<double>(x2, x[i]);
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y2 = max<double>(y2, y[i]);
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}
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}
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}
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/*
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* Note that the coordinate system in HTML and PDF are different
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* This functions returns the angle of vector (dx,dy) in the PDF coordinate system, in rad
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*/
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static double get_angle(double dx, double dy)
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{
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double r = hypot(dx, dy);
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/*
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* acos always returns [0, pi]
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*/
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double ang = acos(dx / r);
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/*
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* for angle below x-axis
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*/
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if(dy < 0)
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ang = -ang;
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return ang;
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}
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class LinearGradient
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{
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public:
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LinearGradient(GfxAxialShading * shading,
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double x1, double y1, double x2, double y2);
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void dumpto (ostream & out);
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static void style_function (void * p, ostream & out)
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{
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static_cast<LinearGradient*>(p)->dumpto(out);
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}
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// TODO, add alpha
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class ColorStop
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{
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public:
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GfxRGB rgb;
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double pos; // [0,1]
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};
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vector<ColorStop> stops;
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double angle;
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};
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LinearGradient::LinearGradient (GfxAxialShading * shading,
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double x1, double y1, double x2, double y2)
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{
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// coordinate for t = 0 and t = 1
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double t0x, t0y, t1x, t1y;
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shading->getCoords(&t0x, &t0y, &t1x, &t1y);
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angle = get_angle(t1x - t0x, t1y - t0y);
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// get the range of t in the box
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// from GfxState.cc in poppler
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double box_tmin, box_tmax;
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{
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double idx = t1x - t0x;
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double idy = t1y - t0y;
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double inv_len = 1.0 / (idx * idx + idy * idy);
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idx *= inv_len;
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idy *= inv_len;
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// t of (x1,y1)
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box_tmin = box_tmax = (x1 - t0x) * idx + (y1 - t0y) * idy;
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double tdx = (x2 - x1) * idx;
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if(tdx < 0)
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box_tmin += tdx;
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else
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box_tmax += tdx;
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double tdy = (y2 - y1) * idy;
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if(tdy < 0)
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box_tmin += tdy;
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else
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box_tmax += tdy;
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}
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// get the domain of t in the box
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double domain_tmin = max<double>(box_tmin, shading->getDomain0());
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double domain_tmax = min<double>(box_tmax, shading->getDomain1());
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// TODO: better sampling
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// TODO: check background color
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{
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stops.clear();
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double tstep = (domain_tmax - domain_tmin) / 13.0;
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for(double t = domain_tmin; t <= domain_tmax; t += tstep)
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{
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GfxColor color;
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shading->getColor(t, &color);
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ColorStop stop;
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shading->getColorSpace()->getRGB(&color, &stop.rgb);
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stop.pos = (t - box_tmin) / (box_tmax - box_tmin);
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stops.push_back(stop);
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}
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}
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}
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void LinearGradient::dumpto (ostream & out)
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{
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auto prefixes = {"", "-ms-", "-webkit-"};
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for(auto iter = prefixes.begin(); iter != prefixes.end(); ++iter)
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{
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out << "background-image:" << (*iter) << "linear-gradient(" << round(angle) << "rad";
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for(auto iter2 = stops.begin(); iter2 != stops.end(); ++iter2)
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{
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out << "," << (iter2->rgb) << " " << round((iter2->pos) * 100) << "%";
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}
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out << ");";
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}
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}
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GBool HTMLRenderer::axialShadedFill(GfxState *state, GfxAxialShading *shading, double tMin, double tMax)
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{
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if(!(param.css_draw)) return gFalse;
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double x1, y1, x2, y2;
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get_shading_bbox(state, shading, x1, y1, x2, y2);
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LinearGradient lg(shading, x1, y1, x2, y2);
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// TODO: check background color
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css_draw_rectangle(x1, y1, x2-x1, y2-y1, state->getCTM(),
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nullptr, 0,
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nullptr, nullptr,
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LinearGradient::style_function, &lg);
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return gTrue;
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}
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//TODO track state
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//TODO connection style
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bool HTMLRenderer::css_do_path(GfxState *state, bool fill, bool test_only)
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{
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if(!(param.css_draw)) return false;
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GfxPath * path = state->getPath();
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/*
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* capacity check
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*/
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for(int i = 0; i < path->getNumSubpaths(); ++i)
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{
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GfxSubpath * subpath = path->getSubpath(i);
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if(!(is_horizontal_line(subpath)
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|| is_vertical_line(subpath)
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|| is_rectangle(subpath)))
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return false;
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}
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if(test_only)
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return true;
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for(int i = 0; i < path->getNumSubpaths(); ++i)
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{
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GfxSubpath * subpath = path->getSubpath(i);
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if(is_horizontal_line(subpath))
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{
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double x1 = subpath->getX(0);
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double x2 = subpath->getX(1);
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double y = subpath->getY(0);
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if(x1 > x2) swap(x1, x2);
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GfxRGB stroke_color;
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state->getStrokeRGB(&stroke_color);
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double lw = state->getLineWidth();
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css_draw_rectangle(x1, y - lw/2, x2-x1, lw, state->getCTM(),
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nullptr, 0,
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nullptr, &stroke_color);
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}
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else if(is_vertical_line(subpath))
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{
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double x = subpath->getX(0);
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double y1 = subpath->getY(0);
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double y2 = subpath->getY(1);
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if(y1 > y2) swap(y1, y2);
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GfxRGB stroke_color;
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state->getStrokeRGB(&stroke_color);
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double lw = state->getLineWidth();
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css_draw_rectangle(x-lw/2, y1, lw, y2-y1, state->getCTM(),
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nullptr, 0,
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nullptr, &stroke_color);
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}
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else if(is_rectangle(subpath))
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{
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double x1 = subpath->getX(0);
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double x2 = subpath->getX(2);
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double y1 = subpath->getY(0);
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double y2 = subpath->getY(2);
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if(x1 > x2) swap(x1, x2);
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if(y1 > y2) swap(y1, y2);
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double x,y,w,h,lw[2];
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css_fix_rectangle_border_width(x1, y1, x2, y2, (fill ? 0.0 : state->getLineWidth()),
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x,y,w,h,lw[0],lw[1]);
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GfxRGB stroke_color;
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if(!fill) state->getStrokeRGB(&stroke_color);
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GfxRGB fill_color;
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if(fill) state->getFillRGB(&fill_color);
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int lw_count = 2;
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GfxRGB * ps = fill ? nullptr : (&stroke_color);
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GfxRGB * pf = fill ? (&fill_color) : nullptr;
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if(equal(h, 0) || equal(w, 0))
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{
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// orthogonal line
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// TODO: check length
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pf = ps;
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ps = nullptr;
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h += lw[0];
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w += lw[1];
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}
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css_draw_rectangle(x, y, w, h, state->getCTM(),
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lw, lw_count,
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ps, pf);
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}
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else
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{
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assert(false);
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}
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}
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return true;
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}
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void HTMLRenderer::css_draw_rectangle(double x, double y, double w, double h, const double * tm,
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double * line_width_array, int line_width_count,
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const GfxRGB * line_color, const GfxRGB * fill_color,
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void (*style_function)(void *, ostream &), void * style_function_data)
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{
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double new_tm[6];
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memcpy(new_tm, tm, sizeof(new_tm));
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tm_transform(new_tm, x, y);
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double scale = 1.0;
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{
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static const double sqrt2 = sqrt(2.0);
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double i1 = (new_tm[0] + new_tm[2]) / sqrt2;
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double i2 = (new_tm[1] + new_tm[3]) / sqrt2;
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scale = hypot(i1, i2);
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if(is_positive(scale))
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{
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for(int i = 0; i < 4; ++i)
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new_tm[i] /= scale;
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}
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else
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{
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scale = 1.0;
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}
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}
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(*f_curpage) << "<div class=\"" << CSS::CSS_DRAW_CN
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<< ' ' << CSS::TRANSFORM_MATRIX_CN << all_manager.transform_matrix.install(new_tm)
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<< "\" style=\"";
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if(line_color)
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{
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(*f_curpage) << "border-color:" << *line_color << ";";
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(*f_curpage) << "border-width:";
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for(int i = 0; i < line_width_count; ++i)
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{
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if(i > 0) (*f_curpage) << ' ';
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double lw = line_width_array[i] * scale;
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(*f_curpage) << round(lw);
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if(is_positive(lw)) (*f_curpage) << "px";
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}
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(*f_curpage) << ";";
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}
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else
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{
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(*f_curpage) << "border:none;";
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}
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if(fill_color)
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{
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(*f_curpage) << "background-color:" << (*fill_color) << ";";
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}
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else
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{
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(*f_curpage) << "background-color:transparent;";
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}
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if(style_function)
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{
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style_function(style_function_data, (*f_curpage));
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}
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(*f_curpage) << "bottom:" << round(y) << "px;"
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<< "left:" << round(x) << "px;"
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<< "width:" << round(w * scale) << "px;"
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<< "height:" << round(h * scale) << "px;";
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(*f_curpage) << "\"></div>";
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}
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#endif //disable css drawing
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} // namespace pdf2htmlEX
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@ -75,7 +75,6 @@ struct Param
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int clean_tmp;
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std::string data_dir;
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std::string tmp_dir;
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int css_draw;
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int debug;
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int proof;
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@ -204,8 +204,6 @@ void parse_options (int argc, char **argv)
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.add("clean-tmp", ¶m.clean_tmp, 1, "remove temporary files after conversion")
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.add("tmp-dir", ¶m.tmp_dir, param.tmp_dir, "specify the location of temporary directory.")
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.add("data-dir", ¶m.data_dir, param.data_dir, "specify data directory")
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// TODO: css drawings are hidden on print, for annot links, need to fix it for other drawings
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// .add("css-draw", ¶m.css_draw, 0, "[experimental and unsupported] CSS drawing")
|
||||
.add("debug", ¶m.debug, 0, "print debugging information")
|
||||
.add("proof", ¶m.proof, 0, "texts are drawn on both text layer and background for proof.")
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user