4 // Copyright (C) 2006 Matthias Braun <matze@braunis.de>
6 // This program is free software; you can redistribute it and/or
7 // modify it under the terms of the GNU General Public License
8 // as published by the Free Software Foundation; either version 2
9 // of the License, or (at your option) any later version.
11 // This program is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License
17 // along with this program; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 #ifndef SUPERTUX_DRAWINGCONTEXT_H
21 #define SUPERTUX_DRAWINGCONTEXT_H
32 #include "math/vector.hpp"
33 #include "math/rect.hpp"
34 #include "surface.hpp"
41 // some constants for predefined layer values
43 LAYER_BACKGROUND0 = -300,
44 LAYER_BACKGROUND1 = -200,
45 LAYER_BACKGROUNDTILES = -100,
48 LAYER_FLOATINGOBJECTS = 150,
49 LAYER_FOREGROUNDTILES = 200,
50 LAYER_FOREGROUND0 = 300,
51 LAYER_FOREGROUND1 = 400,
62 : sfactor(GL_SRC_ALPHA), dfactor(GL_ONE_MINUS_SRC_ALPHA)
65 Blend(GLenum s, GLenum d)
66 : sfactor(s), dfactor(d)
71 * This class provides functions for drawing things on screen. It also
72 * maintains a stack of transforms that are applied to graphics.
80 /// Adds a drawing request for a surface into the request list.
81 void draw_surface(const Surface* surface, const Vector& position,
83 /// Adds a drawing request for a surface into the request list.
84 void draw_surface(const Surface* surface, const Vector& position,
85 float angle, const Color& color, const Blend& blend,
87 /// Adds a drawing request for part of a surface.
88 void draw_surface_part(const Surface* surface, const Vector& source,
89 const Vector& size, const Vector& dest, int layer);
91 void draw_text(const Font* font, const std::string& text,
92 const Vector& position, FontAlignment alignment, int layer);
94 /// Draws text on screen center (feed Vector.x with a 0).
95 /// This is the same as draw_text() with a SCREEN_WIDTH/2 position and
96 /// alignment set to LEFT_ALLIGN
97 void draw_center_text(const Font* font, const std::string& text,
98 const Vector& position, int layer);
99 /// Draws a color gradient onto the whole screen */
100 void draw_gradient(const Color& from, const Color& to, int layer);
101 /// Fills a rectangle.
102 void draw_filled_rect(const Vector& topleft, const Vector& size,
103 const Color& color, int layer);
104 void draw_filled_rect(const Rect& rect, const Color& color, int layer);
106 /// Processes all pending drawing requests and flushes the list.
109 const Vector& get_translation() const
110 { return transform.translation; }
112 void set_translation(const Vector& newtranslation)
113 { transform.translation = newtranslation; }
115 void push_transform();
116 void pop_transform();
118 /// Apply that effect in the next draws (effects are listed on surface.h).
119 void set_drawing_effect(DrawingEffect effect);
120 /// return currently applied drawing effect
121 DrawingEffect get_drawing_effect() const;
122 /// apply that alpha in the next draws (1.0 means fully opaque) */
123 void set_alpha(float alpha);
124 /// return currently set alpha
125 float get_alpha() const;
132 void set_target(Target target);
139 DrawingEffect drawing_effect;
143 : drawing_effect(NO_EFFECT), alpha(1.0f)
146 Vector apply(const Vector& v) const
148 return v - translation;
152 /// the transform stack
153 std::vector<Transform> transformstack;
154 /// the currently active transform
157 std::vector<Blend> blend_stack;
162 SURFACE, SURFACE_PART, TEXT, GRADIENT, FILLRECT
165 struct SurfacePartRequest
167 const Surface* surface;
175 FontAlignment alignment;
178 struct GradientRequest
184 struct FillRectRequest
190 struct DrawingRequest
196 DrawingEffect drawing_effect;
206 color(1.0f, 1.0f, 1.0f, 1.0f)
209 bool operator<(const DrawingRequest& other) const
211 return layer < other.layer;
215 typedef std::vector<DrawingRequest> DrawingRequests;
217 void handle_drawing_requests(DrawingRequests& requests);
218 void draw_surface_part(DrawingRequest& request);
219 void draw_text(DrawingRequest& request);
220 void draw_text_center(DrawingRequest& request);
221 void draw_gradient(DrawingRequest& request);
222 void draw_filled_rect(DrawingRequest& request);
224 DrawingRequests drawing_requests;
225 DrawingRequests lightmap_requests;
227 DrawingRequests* requests;
231 std::vector<Target> target_stack;
233 int lightmap_width, lightmap_height;
234 float lightmap_uv_right, lightmap_uv_bottom;