2 // Copyright (C) 2006 Matthias Braun <matze@braunis.de>
4 // This program is free software: you can redistribute it and/or modify
5 // it under the terms of the GNU General Public License as published by
6 // the Free Software Foundation, either version 3 of the License, or
7 // (at your option) any later version.
9 // This program is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License
15 // along with this program. If not, see <http://www.gnu.org/licenses/>.
17 #ifndef HEADER_SUPERTUX_VIDEO_DRAWING_CONTEXT_HPP
18 #define HEADER_SUPERTUX_VIDEO_DRAWING_CONTEXT_HPP
26 #include "math/rectf.hpp"
27 #include "math/vector.hpp"
28 #include "video/color.hpp"
29 #include "video/drawing_request.hpp"
30 #include "video/font.hpp"
31 #include "video/font_ptr.hpp"
32 #include "video/texture.hpp"
39 inline int next_po2(int val)
49 * This class provides functions for drawing things on screen. It also
50 * maintains a stack of transforms that are applied to graphics.
55 DrawingContext(Renderer& renderer, Lightmap& lightmap);
58 /// Adds a drawing request for a surface into the request list.
59 void draw_surface(SurfacePtr surface, const Vector& position,
61 /// Adds a drawing request for a surface into the request list.
62 void draw_surface(SurfacePtr surface, const Vector& position,
63 float angle, const Color& color, const Blend& blend,
65 /// Adds a drawing request for part of a surface.
66 void draw_surface_part(SurfacePtr surface, const Vector& source,
67 const Vector& size, const Vector& dest, int layer);
69 void draw_text(FontPtr font, const std::string& text,
70 const Vector& position, FontAlignment alignment, int layer, Color color = Color(1.0,1.0,1.0));
72 /// Draws text on screen center (feed Vector.x with a 0).
73 /// This is the same as draw_text() with a SCREEN_WIDTH/2 position and
74 /// alignment set to LEFT_ALIGN
75 void draw_center_text(FontPtr font, const std::string& text,
76 const Vector& position, int layer, Color color = Color(1.0,1.0,1.0));
77 /// Draws a color gradient onto the whole screen */
78 void draw_gradient(const Color& from, const Color& to, int layer);
79 /// Fills a rectangle.
80 void draw_filled_rect(const Vector& topleft, const Vector& size,
81 const Color& color, int layer);
82 void draw_filled_rect(const Rectf& rect, const Color& color, int layer);
83 void draw_filled_rect(const Rectf& rect, const Color& color, float radius, int layer);
85 void draw_inverse_ellipse(const Vector& pos, const Vector& size, const Color& color, int layer);
87 /// Returns the visible area in world coordinates
88 Rectf get_cliprect() const;
90 /// Processes all pending drawing requests and flushes the list.
93 const Vector& get_translation() const
94 { return transform.translation; }
96 void set_translation(const Vector& newtranslation)
97 { transform.translation = newtranslation; }
99 void push_transform();
100 void pop_transform();
102 /// Apply that effect in the next draws (effects are listed on surface.h).
103 void set_drawing_effect(DrawingEffect effect);
104 /// return currently applied drawing effect
105 DrawingEffect get_drawing_effect() const;
106 /// apply that alpha in the next draws (1.0 means fully opaque) */
107 void set_alpha(float alpha);
108 /// return currently set alpha
109 float get_alpha() const;
111 /// on next update, set color to lightmap's color at position
112 void get_light(const Vector& position, Color* color );
114 typedef ::Target Target;
115 static const Target NORMAL = ::NORMAL;
116 static const Target LIGHTMAP = ::LIGHTMAP;
119 void set_target(Target target);
121 void set_ambient_color( Color new_color );
124 * requests that a screenshot be taken after the next frame has been rendered
126 void take_screenshot();
129 typedef std::vector<DrawingRequest*> DrawingRequests;
132 void handle_drawing_requests(DrawingRequests& requests);
139 DrawingEffect drawing_effect;
144 drawing_effect(NO_EFFECT),
148 Vector apply(const Vector& v) const
150 return v - translation;
158 /// the transform stack
159 std::vector<Transform> transformstack;
160 /// the currently active transform
163 std::vector<Blend> blend_stack;
166 DrawingRequests drawing_requests;
167 DrawingRequests lightmap_requests;
169 DrawingRequests* requests;
173 std::vector<Target> target_stack;
175 /* obstack holding the memory of the drawing requests */
178 bool screenshot_requested; /**< true if a screenshot should be taken after the next frame has been rendered */
181 DrawingContext(const DrawingContext&);
182 DrawingContext& operator=(const DrawingContext&);