1 #ifndef __EXTENSION_INTERNAL_PDFINPUT_SVGBUILDER_H__
2 #define __EXTENSION_INTERNAL_PDFINPUT_SVGBUILDER_H__
4 /** \file
5 * SVG representation creator using libpoppler.
6 *
7 * Authors:
8 * miklos erdelyi
9 *
10 * Copyright (C) 2007 Authors
11 *
12 * Released under GNU GPL, read the file 'COPYING' for more information
13 */
15 #ifdef HAVE_CONFIG_H
16 # include <config.h>
17 #endif
19 #ifdef HAVE_POPPLER
21 class SPDocument;
22 namespace Inkscape {
23 namespace XML {
24 class Document;
25 class Node;
26 }
27 }
29 #include "libnr/nr-point.h"
30 #include "libnr/nr-matrix.h"
32 #include "CharTypes.h"
33 class GooString;
34 class Function;
35 class SampledFunction;
36 struct GfxState;
37 class GfxPattern;
38 class GfxShadingPattern;
39 class GfxTilingPattern;
40 class GfxFont;
41 class GfxImageColorMap;
42 class Stream;
43 class XRef;
45 class SPCSSAttr;
47 #include <vector>
48 #include <glib/gtypes.h>
50 namespace Inkscape {
51 namespace Extension {
52 namespace Internal {
54 /**
55 * \struct SvgGlyph
56 * Holds information about glyphs added by PdfParser which haven't been added
57 * to the document yet.
58 */
59 struct SvgGlyph {
60 NR::Point position; // Absolute glyph coords
61 NR::Point text_position; // Absolute glyph coords in text space
62 double dx, dy; // Advance values
63 double rise; // Text rise parameter
64 char code[8]; // UTF-8 coded character
65 int code_size;
66 bool is_space;
68 bool style_changed; // Set to true if style has to be reset
69 SPCSSAttr *style;
70 int render_mode; // Text render mode
71 char *font_specification; // Pointer to current font specification
72 };
74 /**
75 * \class SvgBuilder
76 *
77 * Builds the inner SVG representation from the calls of PdfParser
78 *
79 */
80 class SvgBuilder {
81 public:
82 SvgBuilder(SPDocument *document, gchar *docname, XRef *xref);
83 SvgBuilder(SvgBuilder *parent, Inkscape::XML::Node *root);
84 ~SvgBuilder();
86 // Property setting
87 void setDocumentSize(double width, double height); // Document size in px
88 void setAsLayer(char *layer_name=NULL);
90 // Handling the node stack
91 Inkscape::XML::Node *pushGroup();
92 Inkscape::XML::Node *popGroup();
93 Inkscape::XML::Node *getContainer(); // Returns current group node
95 // Path adding
96 void addPath(GfxState *state, bool fill, bool stroke, bool even_odd=false);
98 // Image handling
99 void addImage(GfxState *state, Stream *str, int width, int height,
100 GfxImageColorMap *color_map, int *mask_colors);
102 // Text handling
103 void beginString(GfxState *state, GooString *s);
104 void endString(GfxState *state);
105 void addChar(GfxState *state, double x, double y,
106 double dx, double dy,
107 double originX, double originY,
108 CharCode code, int nBytes, Unicode *u, int uLen);
109 void beginTextObject(GfxState *state);
110 void endTextObject(GfxState *state);
112 bool isPatternTypeSupported(GfxPattern *pattern);
114 // State manipulation
115 void saveState();
116 void restoreState();
117 void updateStyle(GfxState *state);
118 void updateFont(GfxState *state);
119 void updateTextPosition(double tx, double ty);
120 void updateTextShift(GfxState *state, double shift);
121 void updateTextMatrix(GfxState *state);
123 // Clipping
124 void clip(GfxState *state, bool even_odd=false);
125 void setClipPath(GfxState *state, bool even_odd=false);
127 // Transforming
128 void setTransform(double c0, double c1, double c2, double c3, double c4,
129 double c5);
130 void setTransform(double *transform);
131 bool getTransform(double *transform);
133 private:
134 SvgBuilder();
136 // Pattern creation
137 gchar *_createPattern(GfxPattern *pattern, GfxState *state, bool is_stroke=false);
138 gchar *_createGradient(GfxShadingPattern *shading_pattern);
139 bool _addStopsToGradient(Inkscape::XML::Node *gradient, Function *func, double opacity);
140 bool _addSamplesToGradient(Inkscape::XML::Node *gradient, SampledFunction *func,
141 double offset0, double offset1, double opacity);
142 gchar *_createTilingPattern(GfxTilingPattern *tiling_pattern, GfxState *state,
143 bool is_stroke=false);
144 // Image/mask creation
145 Inkscape::XML::Node *_createImage(Stream *str, int width, int height,
146 GfxImageColorMap *color_map, int *mask_colors,
147 bool alpha_only=false, bool invert_alpha=false);
148 // Style setting
149 SPCSSAttr *_setStyle(GfxState *state, bool fill, bool stroke, bool even_odd=false);
150 void _setStrokeStyle(SPCSSAttr *css, GfxState *state);
151 void _setFillStyle(SPCSSAttr *css, GfxState *state, bool even_odd);
153 void _flushText(); // Write buffered text into doc
155 std::vector<int> _group_depth; // Depth of nesting groups
157 SPCSSAttr *_font_style; // Current font style
158 GfxFont *_current_font;
159 char *_font_specification;
160 double _font_scaling;
161 bool _need_font_update;
162 NR::Matrix _text_matrix;
163 NR::Point _text_position;
164 std::vector<SvgGlyph> _glyphs; // Added characters
165 bool _in_text_object; // Whether we are inside a text object
166 bool _invalidated_style;
167 GfxState *_current_state;
169 SPDocument *_doc;
170 gchar *_docname; // Basename of the URI from which this document is created
171 XRef *_xref; // Cross-reference table from the PDF doc we're converting from
172 Inkscape::XML::Document *_xml_doc;
173 Inkscape::XML::Node *_root; // Root node from the point of view of this SvgBuilder
174 Inkscape::XML::Node *_container; // Current container (group/pattern/mask)
175 double _width, _height; // Document size in px
176 };
179 } } } /* namespace Inkscape, Extension, Internal */
181 #endif /* HAVE_POPPLER */
183 #endif /* __EXTENSION_INTERNAL_PDFINPUT_SVGBUILDER_H__ */
185 /*
186 Local Variables:
187 mode:c++
188 c-file-style:"stroustrup"
189 c-file-offsets:((innamespace . 0)(inline-open . 0))
190 indent-tabs-mode:nil
191 fill-column:99
192 End:
193 */
194 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :