+ public:
+ DrawingContext();
+ ~DrawingContext();
+
+ /// Adds a drawing request for a surface into the request list.
+ void draw_surface(const Surface* surface, const Vector& position, int layer,
+ Uint32 drawing_effect = NONE_EFFECT);
+ /// Adds a drawing request for part of a surface.
+ void draw_surface_part(const Surface* surface, const Vector& source,
+ const Vector& size, const Vector& dest, int layer,
+ Uint32 drawing_effect = NONE_EFFECT);
+ /// Draws a text.
+ void draw_text(Font* font, const std::string& text, const Vector& position,
+ int allignment, int layer,
+ Uint32 drawing_effect = NONE_EFFECT);
+
+ /// Draws text on screen center (feed Vector.x with a 0).
+ /// This is the same as draw_text() with a screen->w/2 position and
+ /// allignment set to LEFT_ALLIGN
+ void draw_center_text(Font* font, const std::string& text,
+ const Vector& position, int layer,
+ Uint32 drawing_effect = NONE_EFFECT);
+ /// Draws a color gradient onto the whole screen */
+ void draw_gradient(Color from, Color to, int layer);
+ /// Fills a rectangle.
+ void draw_filled_rect(const Vector& topleft, const Vector& size,
+ Color color, int layer);
+
+ /// Processes all pending drawing requests and flushes the list.
+ void do_drawing();
+
+ const Vector& get_translation() const
+ { return transform.translation; }
+ Uint32 get_drawing_effect() const
+ { return transform.draw_effect; }
+
+ void set_translation(const Vector& newtranslation)
+ { transform.translation = newtranslation; }
+
+ void push_transform();
+ void pop_transform();
+
+ /// Apply that effect in the next draws (effects are listed on surface.h).
+ void set_drawing_effect(int effect);
+ /// apply that zoom in the next draws */
+ void set_zooming(float zoom);
+ /// apply that alpha in the next draws */
+ void set_alpha(int alpha);
+
+ private:
+ class Transform
+ {
+ public:
+ Vector translation; // only translation for now...
+
+ Vector apply(const Vector& v) const
+ {
+ return v - translation;
+ }
+
+ Uint32 draw_effect;
+ float zoom;
+ int alpha;
+ };
+
+ /// the transform stack
+ std::vector<Transform> transformstack;
+ /// the currently active transform
+ Transform transform;
+
+ enum RequestType
+ {
+ SURFACE, SURFACE_PART, TEXT, GRADIENT, FILLRECT
+ };
+
+ struct SurfacePartRequest
+ {
+ const Surface* surface;
+ Vector source, size;
+ };
+
+ struct TextRequest
+ {
+ Font* font;
+ std::string text;
+ int allignment;
+ };
+
+ struct GradientRequest
+ {
+ Color top, bottom;
+ Vector size;
+ };
+
+ struct FillRectRequest
+ {
+ Color color;
+ Vector size;
+ };
+
+ struct DrawingRequest
+ {
+ int layer;
+ Uint32 drawing_effect;
+ float zoom;
+ int alpha;
+
+ RequestType type;
+ Vector pos;
+
+ void* request_data;
+
+ bool operator<(const DrawingRequest& other) const
+ {
+ return layer < other.layer;
+ }
+ };
+
+ void draw_surface_part(DrawingRequest& request);
+ void draw_text(DrawingRequest& request);
+ void draw_text_center(DrawingRequest& request);
+ void draw_gradient(DrawingRequest& request);
+ void draw_filled_rect(DrawingRequest& request);
+
+ typedef std::vector<DrawingRequest> DrawingRequests;
+ DrawingRequests drawingrequests;
+ };
+
+} //namespace SuperTux