954 lines
29 KiB
C++
954 lines
29 KiB
C++
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//----------------------------------------------------------------------------
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// Anti-Grain Geometry - Version 2.3
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// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
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// Copyright (c) 2008 Rene Rebe <rene@exactcode.de> [ellipse and circle code]
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//
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// Permission to copy, use, modify, sell and distribute this software
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// is granted provided this copyright notice appears in all copies.
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// This software is provided "as is" without express or implied
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// warranty, and with no claim as to its suitability for any purpose.
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//
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//----------------------------------------------------------------------------
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// Contact: mcseem@antigrain.com
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// mcseemagg@yahoo.com
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// http://www.antigrain.com
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//----------------------------------------------------------------------------
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//
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// SVG parser.
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//
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//----------------------------------------------------------------------------
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include "agg_svg_parser.h"
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#include "expat.h"
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namespace agg
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{
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namespace svg
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{
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struct named_color
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{
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char name[22];
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int8u r, g, b, a;
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};
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named_color colors[] =
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{
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{ "aliceblue",240,248,255, 255 },
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{ "antiquewhite",250,235,215, 255 },
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{ "aqua",0,255,255, 255 },
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{ "aquamarine",127,255,212, 255 },
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{ "azure",240,255,255, 255 },
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{ "beige",245,245,220, 255 },
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{ "bisque",255,228,196, 255 },
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{ "black",0,0,0, 255 },
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{ "blanchedalmond",255,235,205, 255 },
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{ "blue",0,0,255, 255 },
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{ "blueviolet",138,43,226, 255 },
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{ "brown",165,42,42, 255 },
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{ "burlywood",222,184,135, 255 },
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{ "cadetblue",95,158,160, 255 },
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{ "chartreuse",127,255,0, 255 },
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{ "chocolate",210,105,30, 255 },
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{ "coral",255,127,80, 255 },
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{ "cornflowerblue",100,149,237, 255 },
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{ "cornsilk",255,248,220, 255 },
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{ "crimson",220,20,60, 255 },
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{ "cyan",0,255,255, 255 },
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{ "darkblue",0,0,139, 255 },
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{ "darkcyan",0,139,139, 255 },
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{ "darkgoldenrod",184,134,11, 255 },
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{ "darkgray",169,169,169, 255 },
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{ "darkgreen",0,100,0, 255 },
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{ "darkgrey",169,169,169, 255 },
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{ "darkkhaki",189,183,107, 255 },
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{ "darkmagenta",139,0,139, 255 },
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{ "darkolivegreen",85,107,47, 255 },
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{ "darkorange",255,140,0, 255 },
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{ "darkorchid",153,50,204, 255 },
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{ "darkred",139,0,0, 255 },
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{ "darksalmon",233,150,122, 255 },
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{ "darkseagreen",143,188,143, 255 },
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{ "darkslateblue",72,61,139, 255 },
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{ "darkslategray",47,79,79, 255 },
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{ "darkslategrey",47,79,79, 255 },
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{ "darkturquoise",0,206,209, 255 },
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{ "darkviolet",148,0,211, 255 },
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{ "deeppink",255,20,147, 255 },
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{ "deepskyblue",0,191,255, 255 },
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{ "dimgray",105,105,105, 255 },
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{ "dimgrey",105,105,105, 255 },
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{ "dodgerblue",30,144,255, 255 },
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{ "firebrick",178,34,34, 255 },
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{ "floralwhite",255,250,240, 255 },
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{ "forestgreen",34,139,34, 255 },
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{ "fuchsia",255,0,255, 255 },
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{ "gainsboro",220,220,220, 255 },
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{ "ghostwhite",248,248,255, 255 },
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{ "gold",255,215,0, 255 },
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{ "goldenrod",218,165,32, 255 },
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{ "gray",128,128,128, 255 },
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{ "green",0,128,0, 255 },
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{ "greenyellow",173,255,47, 255 },
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{ "grey",128,128,128, 255 },
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{ "honeydew",240,255,240, 255 },
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{ "hotpink",255,105,180, 255 },
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{ "indianred",205,92,92, 255 },
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{ "indigo",75,0,130, 255 },
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{ "ivory",255,255,240, 255 },
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{ "khaki",240,230,140, 255 },
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{ "lavender",230,230,250, 255 },
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{ "lavenderblush",255,240,245, 255 },
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{ "lawngreen",124,252,0, 255 },
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{ "lemonchiffon",255,250,205, 255 },
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{ "lightblue",173,216,230, 255 },
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{ "lightcoral",240,128,128, 255 },
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{ "lightcyan",224,255,255, 255 },
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{ "lightgoldenrodyellow",250,250,210, 255 },
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{ "lightgray",211,211,211, 255 },
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{ "lightgreen",144,238,144, 255 },
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{ "lightgrey",211,211,211, 255 },
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{ "lightpink",255,182,193, 255 },
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{ "lightsalmon",255,160,122, 255 },
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{ "lightseagreen",32,178,170, 255 },
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{ "lightskyblue",135,206,250, 255 },
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{ "lightslategray",119,136,153, 255 },
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{ "lightslategrey",119,136,153, 255 },
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{ "lightsteelblue",176,196,222, 255 },
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{ "lightyellow",255,255,224, 255 },
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{ "lime",0,255,0, 255 },
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{ "limegreen",50,205,50, 255 },
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{ "linen",250,240,230, 255 },
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{ "magenta",255,0,255, 255 },
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{ "maroon",128,0,0, 255 },
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{ "mediumaquamarine",102,205,170, 255 },
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{ "mediumblue",0,0,205, 255 },
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{ "mediumorchid",186,85,211, 255 },
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{ "mediumpurple",147,112,219, 255 },
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{ "mediumseagreen",60,179,113, 255 },
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{ "mediumslateblue",123,104,238, 255 },
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{ "mediumspringgreen",0,250,154, 255 },
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{ "mediumturquoise",72,209,204, 255 },
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{ "mediumvioletred",199,21,133, 255 },
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{ "midnightblue",25,25,112, 255 },
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{ "mintcream",245,255,250, 255 },
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{ "mistyrose",255,228,225, 255 },
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{ "moccasin",255,228,181, 255 },
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{ "navajowhite",255,222,173, 255 },
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{ "navy",0,0,128, 255 },
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{ "oldlace",253,245,230, 255 },
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{ "olive",128,128,0, 255 },
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{ "olivedrab",107,142,35, 255 },
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{ "orange",255,165,0, 255 },
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{ "orangered",255,69,0, 255 },
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{ "orchid",218,112,214, 255 },
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{ "palegoldenrod",238,232,170, 255 },
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{ "palegreen",152,251,152, 255 },
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{ "paleturquoise",175,238,238, 255 },
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{ "palevioletred",219,112,147, 255 },
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{ "papayawhip",255,239,213, 255 },
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{ "peachpuff",255,218,185, 255 },
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{ "peru",205,133,63, 255 },
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{ "pink",255,192,203, 255 },
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{ "plum",221,160,221, 255 },
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{ "powderblue",176,224,230, 255 },
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{ "purple",128,0,128, 255 },
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{ "red",255,0,0, 255 },
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{ "rosybrown",188,143,143, 255 },
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{ "royalblue",65,105,225, 255 },
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{ "saddlebrown",139,69,19, 255 },
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{ "salmon",250,128,114, 255 },
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{ "sandybrown",244,164,96, 255 },
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{ "seagreen",46,139,87, 255 },
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{ "seashell",255,245,238, 255 },
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{ "sienna",160,82,45, 255 },
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{ "silver",192,192,192, 255 },
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{ "skyblue",135,206,235, 255 },
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{ "slateblue",106,90,205, 255 },
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{ "slategray",112,128,144, 255 },
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{ "slategrey",112,128,144, 255 },
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{ "snow",255,250,250, 255 },
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{ "springgreen",0,255,127, 255 },
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{ "steelblue",70,130,180, 255 },
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{ "tan",210,180,140, 255 },
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{ "teal",0,128,128, 255 },
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{ "thistle",216,191,216, 255 },
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{ "tomato",255,99,71, 255 },
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{ "turquoise",64,224,208, 255 },
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{ "violet",238,130,238, 255 },
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{ "wheat",245,222,179, 255 },
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{ "white",255,255,255, 255 },
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{ "whitesmoke",245,245,245, 255 },
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{ "yellow",255,255,0, 255 },
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{ "yellowgreen",154,205,50, 255 },
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{ "zzzzzzzzzzz",0,0,0, 0 }
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};
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//------------------------------------------------------------------------
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parser::~parser()
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{
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delete [] m_attr_value;
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delete [] m_attr_name;
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delete [] m_buf;
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delete [] m_title;
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}
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//------------------------------------------------------------------------
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parser::parser(path_renderer& path) :
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m_path(path),
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m_tokenizer(),
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m_buf(new char[buf_size]),
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m_title(new char[256]),
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m_title_len(0),
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m_title_flag(false),
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m_path_flag(false),
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m_attr_name(new char[128]),
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m_attr_value(new char[1024]),
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m_attr_name_len(127),
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m_attr_value_len(1023)
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{
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m_title[0] = 0;
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}
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//------------------------------------------------------------------------
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void parser::parse(const char* fname)
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{
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char msg[1024];
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XML_Parser p = XML_ParserCreate(NULL);
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if(p == 0)
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{
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throw exception("Couldn't allocate memory for parser");
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}
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XML_SetUserData(p, this);
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XML_SetElementHandler(p, start_element, end_element);
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XML_SetCharacterDataHandler(p, content);
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FILE* fd = fopen(fname, "r");
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if(fd == 0)
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{
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sprintf(msg, "Couldn't open file %s", fname);
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throw exception(msg);
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}
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bool done = false;
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do
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{
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size_t len = fread(m_buf, 1, buf_size, fd);
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done = len < buf_size;
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if(!XML_Parse(p, m_buf, len, done))
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{
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sprintf(msg,
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"%s at line %lu\n",
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XML_ErrorString(XML_GetErrorCode(p)),
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XML_GetCurrentLineNumber(p));
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throw exception(msg);
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}
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}
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while(!done);
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fclose(fd);
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XML_ParserFree(p);
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char* ts = m_title;
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while(*ts)
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{
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if(*ts < ' ') *ts = ' ';
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++ts;
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}
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}
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//------------------------------------------------------------------------
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void parser::start_element(void* data, const char* el, const char** attr)
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{
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parser& self = *(parser*)data;
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if(strcmp(el, "title") == 0)
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{
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self.m_title_flag = true;
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}
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else
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if(strcmp(el, "g") == 0)
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{
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self.m_path.push_attr();
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self.parse_attr(attr);
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}
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else
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if(strcmp(el, "path") == 0)
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{
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if(self.m_path_flag)
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{
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throw exception("start_element: Nested path");
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}
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self.m_path.begin_path();
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self.parse_path(attr);
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self.m_path.end_path();
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self.m_path_flag = true;
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}
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else
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if(strcmp(el, "rect") == 0)
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{
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self.parse_rect(attr);
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}
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else
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if(strcmp(el, "line") == 0)
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{
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self.parse_line(attr);
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}
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else
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if(strcmp(el, "polyline") == 0)
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{
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self.parse_poly(attr, false);
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}
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else
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if(strcmp(el, "polygon") == 0)
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{
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self.parse_poly(attr, true);
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}
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else
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if(strcmp(el, "circle") == 0)
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{
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self.parse_circle(attr);
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}
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else
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if(strcmp(el, "ellipse") == 0)
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{
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self.parse_ellipse(attr);
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}
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//else
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//if(strcmp(el, "<OTHER_ELEMENTS>") == 0)
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//{
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//}
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// . . .
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}
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//------------------------------------------------------------------------
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void parser::end_element(void* data, const char* el)
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{
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parser& self = *(parser*)data;
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if(strcmp(el, "title") == 0)
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{
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self.m_title_flag = false;
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}
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else
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if(strcmp(el, "g") == 0)
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{
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self.m_path.pop_attr();
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}
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else
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if(strcmp(el, "path") == 0)
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{
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self.m_path_flag = false;
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}
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//else
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//if(strcmp(el, "<OTHER_ELEMENTS>") == 0)
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//{
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//}
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// . . .
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}
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//------------------------------------------------------------------------
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|
|
void parser::content(void* data, const char* s, int len)
|
||
|
|
{
|
||
|
|
parser& self = *(parser*)data;
|
||
|
|
|
||
|
|
// m_title_flag signals that the <title> tag is being parsed now.
|
||
|
|
// The following code concatenates the pieces of content of the <title> tag.
|
||
|
|
if(self.m_title_flag)
|
||
|
|
{
|
||
|
|
if(len + self.m_title_len > 255) len = 255 - self.m_title_len;
|
||
|
|
if(len > 0)
|
||
|
|
{
|
||
|
|
memcpy(self.m_title + self.m_title_len, s, len);
|
||
|
|
self.m_title_len += len;
|
||
|
|
self.m_title[self.m_title_len] = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------
|
||
|
|
void parser::parse_attr(const char** attr)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
for(i = 0; attr[i]; i += 2)
|
||
|
|
{
|
||
|
|
if(strcmp(attr[i], "style") == 0)
|
||
|
|
{
|
||
|
|
parse_style(attr[i + 1]);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
parse_attr(attr[i], attr[i + 1]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
void parser::parse_path(const char** attr)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
for(i = 0; attr[i]; i += 2)
|
||
|
|
{
|
||
|
|
// The <path> tag can consist of the path itself ("d=")
|
||
|
|
// as well as of other parameters like "style=", "transform=", etc.
|
||
|
|
// In the last case we simply rely on the function of parsing
|
||
|
|
// attributes (see 'else' branch).
|
||
|
|
if(strcmp(attr[i], "d") == 0)
|
||
|
|
{
|
||
|
|
m_tokenizer.set_path_str(attr[i + 1]);
|
||
|
|
m_path.parse_path(m_tokenizer);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// Create a temporary single pair "name-value" in order
|
||
|
|
// to avoid multiple calls for the same attribute.
|
||
|
|
const char* tmp[4];
|
||
|
|
tmp[0] = attr[i];
|
||
|
|
tmp[1] = attr[i + 1];
|
||
|
|
tmp[2] = 0;
|
||
|
|
tmp[3] = 0;
|
||
|
|
parse_attr(tmp);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
int cmp_color(const void* p1, const void* p2)
|
||
|
|
{
|
||
|
|
return strcmp(((named_color*)p1)->name, ((named_color*)p2)->name);
|
||
|
|
}
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
rgba8 parse_color(const char* str)
|
||
|
|
{
|
||
|
|
while(*str == ' ') ++str;
|
||
|
|
unsigned c = 0;
|
||
|
|
if(*str == '#')
|
||
|
|
{
|
||
|
|
sscanf(str + 1, "%x", &c);
|
||
|
|
return rgb8_packed(c);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
named_color c;
|
||
|
|
unsigned len = strlen(str);
|
||
|
|
if(len > sizeof(c.name) - 1)
|
||
|
|
{
|
||
|
|
throw exception("parse_color: Invalid color name '%s'", str);
|
||
|
|
}
|
||
|
|
strcpy(c.name, str);
|
||
|
|
const void* p = bsearch(&c,
|
||
|
|
colors,
|
||
|
|
sizeof(colors) / sizeof(colors[0]),
|
||
|
|
sizeof(colors[0]),
|
||
|
|
cmp_color);
|
||
|
|
if(p == 0)
|
||
|
|
{
|
||
|
|
throw exception("parse_color: Invalid color name '%s'", str);
|
||
|
|
}
|
||
|
|
const named_color* pc = (const named_color*)p;
|
||
|
|
return rgba8(pc->r, pc->g, pc->b, pc->a);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
double parse_double(const char* str)
|
||
|
|
{
|
||
|
|
while(*str == ' ') ++str;
|
||
|
|
return atof(str);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
bool parser::parse_attr(const char* name, const char* value)
|
||
|
|
{
|
||
|
|
if(strcmp(name, "style") == 0)
|
||
|
|
{
|
||
|
|
parse_style(value);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if(strcmp(name, "fill") == 0)
|
||
|
|
{
|
||
|
|
if(strcmp(value, "none") == 0)
|
||
|
|
{
|
||
|
|
m_path.fill_none();
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
m_path.fill(parse_color(value));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if(strcmp(name, "fill-opacity") == 0)
|
||
|
|
{
|
||
|
|
m_path.fill_opacity(parse_double(value));
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if(strcmp(name, "stroke") == 0)
|
||
|
|
{
|
||
|
|
if(strcmp(value, "none") == 0)
|
||
|
|
{
|
||
|
|
m_path.stroke_none();
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
m_path.stroke(parse_color(value));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if(strcmp(name, "stroke-width") == 0)
|
||
|
|
{
|
||
|
|
m_path.stroke_width(parse_double(value));
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if(strcmp(name, "stroke-linecap") == 0)
|
||
|
|
{
|
||
|
|
if(strcmp(value, "butt") == 0) m_path.line_cap(butt_cap);
|
||
|
|
else if(strcmp(value, "round") == 0) m_path.line_cap(round_cap);
|
||
|
|
else if(strcmp(value, "square") == 0) m_path.line_cap(square_cap);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if(strcmp(name, "stroke-linejoin") == 0)
|
||
|
|
{
|
||
|
|
if(strcmp(value, "miter") == 0) m_path.line_join(miter_join);
|
||
|
|
else if(strcmp(value, "round") == 0) m_path.line_join(round_join);
|
||
|
|
else if(strcmp(value, "bevel") == 0) m_path.line_join(bevel_join);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if(strcmp(name, "stroke-miterlimit") == 0)
|
||
|
|
{
|
||
|
|
m_path.miter_limit(parse_double(value));
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if(strcmp(name, "stroke-opacity") == 0)
|
||
|
|
{
|
||
|
|
m_path.stroke_opacity(parse_double(value));
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if(strcmp(name, "transform") == 0)
|
||
|
|
{
|
||
|
|
parse_transform(value);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if(strcmp(name, "fill-rule") == 0)
|
||
|
|
{
|
||
|
|
m_path.even_odd(strcmp(value, "evenodd") == 0);
|
||
|
|
}
|
||
|
|
//else
|
||
|
|
//if(strcmp(el, "<OTHER_ATTRIBUTES>") == 0)
|
||
|
|
//{
|
||
|
|
//}
|
||
|
|
// . . .
|
||
|
|
else
|
||
|
|
{
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
void parser::copy_name(const char* start, const char* end)
|
||
|
|
{
|
||
|
|
unsigned len = unsigned(end - start);
|
||
|
|
if(m_attr_name_len == 0 || len > m_attr_name_len)
|
||
|
|
{
|
||
|
|
delete [] m_attr_name;
|
||
|
|
m_attr_name = new char[len + 1];
|
||
|
|
m_attr_name_len = len;
|
||
|
|
}
|
||
|
|
if(len) memcpy(m_attr_name, start, len);
|
||
|
|
m_attr_name[len] = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
void parser::copy_value(const char* start, const char* end)
|
||
|
|
{
|
||
|
|
unsigned len = unsigned(end - start);
|
||
|
|
if(m_attr_value_len == 0 || len > m_attr_value_len)
|
||
|
|
{
|
||
|
|
delete [] m_attr_value;
|
||
|
|
m_attr_value = new char[len + 1];
|
||
|
|
m_attr_value_len = len;
|
||
|
|
}
|
||
|
|
if(len) memcpy(m_attr_value, start, len);
|
||
|
|
m_attr_value[len] = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
bool parser::parse_name_value(const char* nv_start, const char* nv_end)
|
||
|
|
{
|
||
|
|
const char* str = nv_start;
|
||
|
|
while(str < nv_end && *str != ':') ++str;
|
||
|
|
|
||
|
|
const char* val = str;
|
||
|
|
|
||
|
|
// Right Trim
|
||
|
|
while(str > nv_start &&
|
||
|
|
(*str == ':' || isspace(*str))) --str;
|
||
|
|
++str;
|
||
|
|
|
||
|
|
copy_name(nv_start, str);
|
||
|
|
|
||
|
|
while(val < nv_end && (*val == ':' || isspace(*val))) ++val;
|
||
|
|
|
||
|
|
copy_value(val, nv_end);
|
||
|
|
return parse_attr(m_attr_name, m_attr_value);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
void parser::parse_style(const char* str)
|
||
|
|
{
|
||
|
|
while(*str)
|
||
|
|
{
|
||
|
|
// Left Trim
|
||
|
|
while(*str && isspace(*str)) ++str;
|
||
|
|
const char* nv_start = str;
|
||
|
|
while(*str && *str != ';') ++str;
|
||
|
|
const char* nv_end = str;
|
||
|
|
|
||
|
|
// Right Trim
|
||
|
|
while(nv_end > nv_start &&
|
||
|
|
(*nv_end == ';' || isspace(*nv_end))) --nv_end;
|
||
|
|
++nv_end;
|
||
|
|
|
||
|
|
parse_name_value(nv_start, nv_end);
|
||
|
|
if(*str) ++str;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
void parser::parse_rect(const char** attr)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
double x = 0.0;
|
||
|
|
double y = 0.0;
|
||
|
|
double w = 0.0;
|
||
|
|
double h = 0.0;
|
||
|
|
|
||
|
|
m_path.begin_path();
|
||
|
|
for(i = 0; attr[i]; i += 2)
|
||
|
|
{
|
||
|
|
if(!parse_attr(attr[i], attr[i + 1]))
|
||
|
|
{
|
||
|
|
if(strcmp(attr[i], "x") == 0) x = parse_double(attr[i + 1]);
|
||
|
|
if(strcmp(attr[i], "y") == 0) y = parse_double(attr[i + 1]);
|
||
|
|
if(strcmp(attr[i], "width") == 0) w = parse_double(attr[i + 1]);
|
||
|
|
if(strcmp(attr[i], "height") == 0) h = parse_double(attr[i + 1]);
|
||
|
|
// rx - to be implemented
|
||
|
|
// ry - to be implemented
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
if(w != 0.0 && h != 0.0)
|
||
|
|
{
|
||
|
|
if(w < 0.0) throw exception("parse_rect: Invalid width: %f", w);
|
||
|
|
if(h < 0.0) throw exception("parse_rect: Invalid height: %f", h);
|
||
|
|
|
||
|
|
m_path.move_to(x, y);
|
||
|
|
m_path.line_to(x + w, y);
|
||
|
|
m_path.line_to(x + w, y + h);
|
||
|
|
m_path.line_to(x, y + h);
|
||
|
|
m_path.close_subpath();
|
||
|
|
}
|
||
|
|
m_path.end_path();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
void parser::parse_line(const char** attr)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
double x1 = 0.0;
|
||
|
|
double y1 = 0.0;
|
||
|
|
double x2 = 0.0;
|
||
|
|
double y2 = 0.0;
|
||
|
|
|
||
|
|
m_path.begin_path();
|
||
|
|
for(i = 0; attr[i]; i += 2)
|
||
|
|
{
|
||
|
|
if(!parse_attr(attr[i], attr[i + 1]))
|
||
|
|
{
|
||
|
|
if(strcmp(attr[i], "x1") == 0) x1 = parse_double(attr[i + 1]);
|
||
|
|
if(strcmp(attr[i], "y1") == 0) y1 = parse_double(attr[i + 1]);
|
||
|
|
if(strcmp(attr[i], "x2") == 0) x2 = parse_double(attr[i + 1]);
|
||
|
|
if(strcmp(attr[i], "y2") == 0) y2 = parse_double(attr[i + 1]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
m_path.move_to(x1, y1);
|
||
|
|
m_path.line_to(x2, y2);
|
||
|
|
m_path.end_path();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
void parser::parse_poly(const char** attr, bool close_flag)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
double x = 0.0;
|
||
|
|
double y = 0.0;
|
||
|
|
|
||
|
|
m_path.begin_path();
|
||
|
|
for(i = 0; attr[i]; i += 2)
|
||
|
|
{
|
||
|
|
if(!parse_attr(attr[i], attr[i + 1]))
|
||
|
|
{
|
||
|
|
if(strcmp(attr[i], "points") == 0)
|
||
|
|
{
|
||
|
|
m_tokenizer.set_path_str(attr[i + 1]);
|
||
|
|
if(!m_tokenizer.next())
|
||
|
|
{
|
||
|
|
throw exception("parse_poly: Too few coordinates");
|
||
|
|
}
|
||
|
|
x = m_tokenizer.last_number();
|
||
|
|
if(!m_tokenizer.next())
|
||
|
|
{
|
||
|
|
throw exception("parse_poly: Too few coordinates");
|
||
|
|
}
|
||
|
|
y = m_tokenizer.last_number();
|
||
|
|
m_path.move_to(x, y);
|
||
|
|
while(m_tokenizer.next())
|
||
|
|
{
|
||
|
|
x = m_tokenizer.last_number();
|
||
|
|
if(!m_tokenizer.next())
|
||
|
|
{
|
||
|
|
throw exception("parse_poly: Odd number of coordinates");
|
||
|
|
}
|
||
|
|
y = m_tokenizer.last_number();
|
||
|
|
m_path.line_to(x, y);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if(close_flag)
|
||
|
|
{
|
||
|
|
m_path.close_subpath();
|
||
|
|
}
|
||
|
|
m_path.end_path();
|
||
|
|
}
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
void parser::parse_circle(const char** attr)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
double cx = 0.0;
|
||
|
|
double cy = 0.0;
|
||
|
|
double r = 0.0;
|
||
|
|
|
||
|
|
m_path.begin_path();
|
||
|
|
for(i = 0; attr[i]; i += 2)
|
||
|
|
{
|
||
|
|
if(!parse_attr(attr[i], attr[i + 1]))
|
||
|
|
{
|
||
|
|
if(strcmp(attr[i], "cx") == 0) cx = parse_double(attr[i + 1]);
|
||
|
|
if(strcmp(attr[i], "cy") == 0) cy = parse_double(attr[i + 1]);
|
||
|
|
if(strcmp(attr[i], "r") == 0) r = parse_double(attr[i + 1]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
m_path.move_to(cx-r, cy);
|
||
|
|
m_path.arc(r, r, 360, true, true, 0, .0001, true);
|
||
|
|
m_path.end_path();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void parser::parse_ellipse(const char** attr)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
double cx = 0.0;
|
||
|
|
double cy = 0.0;
|
||
|
|
double rx = 0.0;
|
||
|
|
double ry = 0.0;
|
||
|
|
|
||
|
|
m_path.begin_path();
|
||
|
|
for(i = 0; attr[i]; i += 2)
|
||
|
|
{
|
||
|
|
if(!parse_attr(attr[i], attr[i + 1]))
|
||
|
|
{
|
||
|
|
if(strcmp(attr[i], "cx") == 0) cx = parse_double(attr[i + 1]);
|
||
|
|
if(strcmp(attr[i], "cy") == 0) cy = parse_double(attr[i + 1]);
|
||
|
|
if(strcmp(attr[i], "rx") == 0) rx = parse_double(attr[i + 1]);
|
||
|
|
if(strcmp(attr[i], "ry") == 0) ry = parse_double(attr[i + 1]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
m_path.move_to(cx-rx, cy);
|
||
|
|
m_path.arc(rx, ry, 360, true, true, 0, .0001, true);
|
||
|
|
m_path.end_path();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
void parser::parse_transform(const char* str)
|
||
|
|
{
|
||
|
|
while(*str)
|
||
|
|
{
|
||
|
|
if(islower(*str))
|
||
|
|
{
|
||
|
|
if(strncmp(str, "matrix", 6) == 0) str += parse_matrix(str); else
|
||
|
|
if(strncmp(str, "translate", 9) == 0) str += parse_translate(str); else
|
||
|
|
if(strncmp(str, "rotate", 6) == 0) str += parse_rotate(str); else
|
||
|
|
if(strncmp(str, "scale", 5) == 0) str += parse_scale(str); else
|
||
|
|
if(strncmp(str, "skewX", 5) == 0) str += parse_skew_x(str); else
|
||
|
|
if(strncmp(str, "skewY", 5) == 0) str += parse_skew_y(str); else
|
||
|
|
{
|
||
|
|
++str;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
++str;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
static bool is_numeric(char c)
|
||
|
|
{
|
||
|
|
return strchr("0123456789+-.eE", c) != 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
static unsigned parse_transform_args(const char* str,
|
||
|
|
double* args,
|
||
|
|
unsigned max_na,
|
||
|
|
unsigned* na)
|
||
|
|
{
|
||
|
|
*na = 0;
|
||
|
|
const char* ptr = str;
|
||
|
|
while(*ptr && *ptr != '(') ++ptr;
|
||
|
|
if(*ptr == 0)
|
||
|
|
{
|
||
|
|
throw exception("parse_transform_args: Invalid syntax");
|
||
|
|
}
|
||
|
|
const char* end = ptr;
|
||
|
|
while(*end && *end != ')') ++end;
|
||
|
|
if(*end == 0)
|
||
|
|
{
|
||
|
|
throw exception("parse_transform_args: Invalid syntax");
|
||
|
|
}
|
||
|
|
|
||
|
|
while(ptr < end)
|
||
|
|
{
|
||
|
|
if(is_numeric(*ptr))
|
||
|
|
{
|
||
|
|
if(*na >= max_na)
|
||
|
|
{
|
||
|
|
throw exception("parse_transform_args: Too many arguments");
|
||
|
|
}
|
||
|
|
args[(*na)++] = atof(ptr);
|
||
|
|
while(ptr < end && is_numeric(*ptr)) ++ptr;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
++ptr;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return unsigned(end - str);
|
||
|
|
}
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
unsigned parser::parse_matrix(const char* str)
|
||
|
|
{
|
||
|
|
double args[6];
|
||
|
|
unsigned na = 0;
|
||
|
|
unsigned len = parse_transform_args(str, args, 6, &na);
|
||
|
|
if(na != 6)
|
||
|
|
{
|
||
|
|
throw exception("parse_matrix: Invalid number of arguments");
|
||
|
|
}
|
||
|
|
m_path.transform().premultiply(trans_affine(args[0], args[1], args[2], args[3], args[4], args[5]));
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
unsigned parser::parse_translate(const char* str)
|
||
|
|
{
|
||
|
|
double args[2];
|
||
|
|
unsigned na = 0;
|
||
|
|
unsigned len = parse_transform_args(str, args, 2, &na);
|
||
|
|
if(na == 1) args[1] = 0.0;
|
||
|
|
m_path.transform().premultiply(trans_affine_translation(args[0], args[1]));
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
unsigned parser::parse_rotate(const char* str)
|
||
|
|
{
|
||
|
|
double args[3];
|
||
|
|
unsigned na = 0;
|
||
|
|
unsigned len = parse_transform_args(str, args, 3, &na);
|
||
|
|
if(na == 1)
|
||
|
|
{
|
||
|
|
m_path.transform().premultiply(trans_affine_rotation(deg2rad(args[0])));
|
||
|
|
}
|
||
|
|
else if(na == 3)
|
||
|
|
{
|
||
|
|
trans_affine t = trans_affine_translation(-args[1], -args[2]);
|
||
|
|
t *= trans_affine_rotation(deg2rad(args[0]));
|
||
|
|
t *= trans_affine_translation(args[1], args[2]);
|
||
|
|
m_path.transform().premultiply(t);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
throw exception("parse_rotate: Invalid number of arguments");
|
||
|
|
}
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
unsigned parser::parse_scale(const char* str)
|
||
|
|
{
|
||
|
|
double args[2];
|
||
|
|
unsigned na = 0;
|
||
|
|
unsigned len = parse_transform_args(str, args, 2, &na);
|
||
|
|
if(na == 1) args[1] = args[0];
|
||
|
|
m_path.transform().premultiply(trans_affine_scaling(args[0], args[1]));
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
unsigned parser::parse_skew_x(const char* str)
|
||
|
|
{
|
||
|
|
double arg;
|
||
|
|
unsigned na = 0;
|
||
|
|
unsigned len = parse_transform_args(str, &arg, 1, &na);
|
||
|
|
m_path.transform().premultiply(trans_affine_skewing(deg2rad(arg), 0.0));
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
//-------------------------------------------------------------
|
||
|
|
unsigned parser::parse_skew_y(const char* str)
|
||
|
|
{
|
||
|
|
double arg;
|
||
|
|
unsigned na = 0;
|
||
|
|
unsigned len = parse_transform_args(str, &arg, 1, &na);
|
||
|
|
m_path.transform().premultiply(trans_affine_skewing(0.0, deg2rad(arg)));
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|