context.h

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00001 /* Copyright (C) 2005 The cairomm Development Team
00002  *
00003  * This library is free software; you can redistribute it and/or
00004  * modify it under the terms of the GNU Library General Public
00005  * License as published by the Free Software Foundation; either
00006  * version 2 of the License, or (at your option) any later version.
00007  *
00008  * This library is distributed in the hope that it will be useful,
00009  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00010  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00011  * Library General Public License for more details.
00012  *
00013  * You should have received a copy of the GNU Library General Public
00014  * License along with this library; if not, write to the Free Software
00015  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
00016  * 02110-1301, USA.
00017  */
00018 
00019 #ifndef __CAIROMM_CONTEXT_H
00020 #define __CAIROMM_CONTEXT_H
00021 
00022 #include <vector>
00023 #include <utility>
00024 #include <cairomm/surface.h>
00025 #include <cairomm/fontface.h>
00026 #include <cairomm/matrix.h>
00027 #include <cairomm/pattern.h>
00028 #include <cairomm/path.h>
00029 #include <cairomm/scaledfont.h>
00030 #include <cairomm/types.h>
00031 #include <valarray>
00032 #include <vector>
00033 #include <cairo.h>
00034 
00035 
00036 namespace Cairo
00037 {
00038 
00047 class Context
00048 {
00049 protected:
00050   explicit Context(const RefPtr<Surface>& target);
00051 
00052 public:
00053 
00061   explicit Context(cairo_t* cobject, bool has_reference = false);
00062 
00063   static RefPtr<Context> create(const RefPtr<Surface>& target);
00064 
00065   virtual ~Context();
00066 
00078   void save();
00079 
00085   void restore();
00086 
00093   void set_operator(Operator op);
00094 
00112   void set_source(const RefPtr<const Pattern>& source);
00113 
00128   void set_source_rgb(double red, double green, double blue);
00129 
00146   void set_source_rgba(double red, double green, double blue, double alpha);
00147 
00167   void set_source(const RefPtr<Surface>& surface, double x, double y);
00168 
00178   void set_tolerance(double tolerance);
00179 
00190   void set_antialias(Antialias antialias);
00191 
00200   void set_fill_rule(FillRule fill_rule);
00201 
00211   void set_line_width(double width);
00212   
00222   void set_line_cap(LineCap line_cap);
00223 
00233   void set_line_join(LineJoin line_join);
00234 
00239   void set_dash(std::valarray<double>& dashes, double offset);
00257   void set_dash(std::vector<double>& dashes, double offset);
00258 
00261   void unset_dash();
00262   void set_miter_limit(double limit);
00263 
00273   void translate(double tx, double ty);
00274 
00282   void scale(double sx, double sy);
00283 
00293   void rotate(double angle_radians);
00294 
00300   void rotate_degrees(double angle_degres);
00301 
00308   void transform(const Matrix& matrix);
00309 
00315   void set_matrix(const Matrix& matrix);
00316 
00321   void set_identity_matrix();
00322 
00329   void user_to_device(double& x, double& y);
00330 
00338   void user_to_device_distance(double& dx, double& dy);
00339 
00346   void device_to_user(double& x, double& y);
00347 
00355   void device_to_user_distance(double& dx, double& dy);
00356 
00359   void begin_new_path();
00360 
00372   void begin_new_sub_path();
00373 
00380   void move_to(double x, double y);
00381 
00388   void line_to(double x, double y);
00389 
00401   void curve_to(double x1, double y1, double x2, double y2, double x3, double y3);
00402 
00442   void arc(double xc, double yc, double radius, double angle1, double angle2);
00443 
00458   void arc_negative(double xc, double yc, double radius, double angle1, double angle2);
00459 
00475   void rel_move_to(double dx, double dy);
00476 
00494   void rel_line_to(double dx, double dy);
00495 
00518   void rel_curve_to(double dx1, double dy1, double dx2, double dy2, double dx3, double dy3);
00519 
00538   void rectangle(double x, double y, double width, double height);
00539 
00550   void close_path();
00551 
00555   void paint();
00556 
00564   void paint_with_alpha(double alpha);
00565 
00572   void mask(const RefPtr<const Pattern>& pattern);
00573 
00582   void mask(const RefPtr<const Surface>& surface, double surface_x, double surface_y);
00583 
00594   void stroke();
00595 
00606   void stroke_preserve();
00607 
00615   void fill();
00616 
00625   void fill_preserve();
00626   void copy_page();
00627   void show_page();
00628   bool in_stroke(double x, double y) const;
00629   bool in_fill(double x, double y) const;
00630   void get_stroke_extents(double& x1, double& y1, double& x2, double& y2) const;
00631   void get_fill_extents(double& x1, double& y1, double& x2, double& y2) const;
00632 
00643   void reset_clip();
00644 
00663   void clip();
00664 
00675   void clip_preserve();
00676 
00688   void get_clip_extents(double& x1, double& y1, double& x2, double& y2) const;
00689 
00698    void copy_clip_rectangle_list(std::vector<Rectangle>& rectangles) const;
00699 
00700   void select_font_face(const std::string& family, FontSlant slant, FontWeight weight);
00701   void set_font_size(double size);
00702   void set_font_matrix(const Matrix& matrix);
00703   void get_font_matrix(Matrix& matrix) const;
00704   void set_font_options(const FontOptions& options);
00705 
00706   //TODO: Documentation.
00710   void get_font_options(FontOptions& options) const;
00711 
00712   //TODO: Documentation.
00716   void set_scaled_font(const RefPtr<const ScaledFont>& scaled_font);
00717 
00718   //TODO: Documentation.
00722   RefPtr<ScaledFont> get_scaled_font();
00723 
00724   //TODO: Documentation:
00725   void show_text(const std::string& utf8);
00726   void show_glyphs(const std::vector<Glyph>& glyphs);
00728   void show_text_glyphs(const std::string& utf8,
00729                         const std::vector<Glyph>& glyphs,
00730                         const std::vector<TextCluster>& clusters,
00731                         TextClusterFlags cluster_flags);
00732 
00733   RefPtr<FontFace> get_font_face();
00734   RefPtr<const FontFace> get_font_face() const;
00735 
00736   void get_font_extents(FontExtents& extents) const;
00737   void set_font_face(const RefPtr<const FontFace>& font_face);
00738   void get_text_extents(const std::string& utf8, TextExtents& extents) const;
00739   void get_glyph_extents(const std::vector<Glyph>& glyphs, TextExtents& extents) const;
00740   void text_path(const std::string& utf8);
00741   void glyph_path(const std::vector<Glyph>& glyphs);
00742 
00745   Operator get_operator() const;
00746 
00749   RefPtr<Pattern> get_source();
00750   RefPtr<const Pattern> get_source() const;
00751 
00754   double get_tolerance() const;
00755 
00758   Antialias get_antialias() const;
00759 
00776   void get_current_point (double& x, double& y) const;
00777 
00780   bool has_current_point() const;
00781 
00784   FillRule get_fill_rule() const;
00785 
00788   double get_line_width() const;
00789 
00792   LineCap get_line_cap() const;
00793 
00796   LineJoin get_line_join() const;
00797 
00800   double get_miter_limit() const;
00801 
00810   void get_dash(std::vector<double>& dashes, double& offset) const;
00811 
00812 
00817   void get_matrix(Matrix& matrix);
00820   Matrix get_matrix() const;
00821 
00826   RefPtr<Surface> get_target();
00827 
00832   RefPtr<const Surface> get_target() const;
00833 
00834   //TODO: Copy or reference-count a Path somethow instead of asking the caller to delete it?
00843   Path* copy_path() const;
00844 
00873   void get_path_extents(double& x1, double& y1, double& x2, double& y2) const;
00874 
00889   Path* copy_path_flat() const;
00890 
00897   void append_path(const Path& path);
00898 
00936   void push_group();
00937 
00951   void push_group_with_content(Content content);
00952 
00965   RefPtr<Pattern> pop_group();
00966 
00986   void pop_group_to_source();
00987 
00999   RefPtr<Surface> get_group_target();
01000 
01004   RefPtr<const Surface> get_group_target() const;
01005 
01008   typedef cairo_t cobject;
01009 
01012   inline cobject* cobj() { return m_cobject; }
01013 
01016   inline const cobject* cobj() const { return m_cobject; }
01017  
01018   #ifndef DOXYGEN_IGNORE_THIS
01020   inline ErrorStatus get_status() const
01021   { return cairo_status(const_cast<cairo_t*>(cobj())); }
01022 
01023   void reference() const;
01024   void unreference() const;
01025   #endif //DOXYGEN_IGNORE_THIS
01026 
01027 protected:
01028 
01029  
01030   cobject* m_cobject;
01031 };
01032 
01033 } // namespace Cairo
01034 
01035 #endif //__CAIROMM_CONTEXT_H
01036 
01037 // vim: ts=2 sw=2 et

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