// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
#ifndef SUPERTUX_DRAWINGCONTEXT_H
#define SUPERTUX_DRAWINGCONTEXT_H
#include <vector>
#include <string>
+#include <memory>
+
#include <stdint.h>
#include <GL/gl.h>
-#include <SDL.h>
-#include <stdint.h>
-#include <memory>
+#include <SDL_video.h>
+#include "obstack/obstack.h"
#include "math/vector.hpp"
#include "math/rect.hpp"
#include "surface.hpp"
class Surface;
class Texture;
+struct DrawingRequest;
// some constants for predefined layer values
enum {
LAYER_FOREGROUNDTILES = 200,
LAYER_FOREGROUND0 = 300,
LAYER_FOREGROUND1 = 400,
- LAYER_GUI = 500
+ LAYER_HUD = 500,
+ LAYER_GUI = 600
+};
+
+class Blend
+{
+public:
+ GLenum sfactor;
+ GLenum dfactor;
+
+ Blend()
+ : sfactor(GL_SRC_ALPHA), dfactor(GL_ONE_MINUS_SRC_ALPHA)
+ {}
+
+ Blend(GLenum s, GLenum d)
+ : sfactor(s), dfactor(d)
+ {}
};
/**
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);
/// Adds a drawing request for a surface into the request list.
void draw_surface(const Surface* surface, const Vector& position,
+ float angle, const Color& color, const Blend& blend,
int layer);
/// Adds a drawing request for part of a surface.
void draw_surface_part(const Surface* surface, const Vector& source,
/// Draws a text.
void draw_text(const Font* font, const std::string& text,
const Vector& position, FontAlignment alignment, int layer);
-
+
/// Draws text on screen center (feed Vector.x with a 0).
/// This is the same as draw_text() with a SCREEN_WIDTH/2 position and
/// alignment set to LEFT_ALLIGN
void draw_filled_rect(const Vector& topleft, const Vector& size,
const Color& color, int layer);
void draw_filled_rect(const Rect& rect, const Color& color, int layer);
-
+
/// Processes all pending drawing requests and flushes the list.
void do_drawing();
-
+
const Vector& get_translation() const
{ return transform.translation; }
-
+
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(DrawingEffect effect);
/// return currently applied drawing effect
/// return currently set alpha
float get_alpha() const;
+ /// on next update, set color to lightmap's color at position
+ void get_light(const Vector& position, Color* color );
+
enum Target {
NORMAL, LIGHTMAP
};
void push_target();
void pop_target();
void set_target(Target target);
-
+
+ void set_ambient_color( Color new_color );
+
+ /**
+ * requests that a screenshot be taken after the next frame has been rendered
+ */
+ void take_screenshot();
+
private:
class Transform
{
Vector translation;
DrawingEffect drawing_effect;
float alpha;
-
+
Transform()
: drawing_effect(NO_EFFECT), alpha(1.0f)
{ }
-
+
Vector apply(const Vector& v) const
{
return v - translation;
}
};
-
+
/// the transform stack
std::vector<Transform> transformstack;
/// the currently active transform
Transform transform;
- class Blend
- {
- public:
- GLenum sfactor;
- GLenum dfactor;
-
- Blend()
- : sfactor(GL_SRC_ALPHA), dfactor(GL_ONE_MINUS_SRC_ALPHA)
- {}
- };
std::vector<Blend> blend_stack;
Blend blend_mode;
-
- enum RequestType
- {
- SURFACE, SURFACE_PART, TEXT, GRADIENT, FILLRECT
- };
-
- struct SurfacePartRequest
- {
- const Surface* surface;
- Vector source, size;
- };
-
- struct TextRequest
- {
- const Font* font;
- std::string text;
- FontAlignment alignment;
- };
-
- struct GradientRequest
- {
- Color top, bottom;
- Vector size;
- };
-
- struct FillRectRequest
- {
- Color color;
- Vector size;
- };
-
- struct DrawingRequest
- {
- RequestType type;
- Vector pos;
-
- int layer;
- DrawingEffect drawing_effect;
- float alpha;
- Blend blend;
-
- void* request_data;
-
- bool operator<(const DrawingRequest& other) const
- {
- return layer < other.layer;
- }
- };
- typedef std::vector<DrawingRequest> DrawingRequests;
-
- void handle_drawing_requests(DrawingRequests& requests);
- 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;
+
+ void handle_drawing_requests(DrawingRequests& requests) const;
+ void draw_surface_part(const DrawingRequest& request) const;
+ void draw_text(const DrawingRequest& request) const;
+ void draw_text_center(const DrawingRequest& request) const;
+ void draw_gradient(const DrawingRequest& request) const;
+ void draw_filled_rect(const DrawingRequest& request) const;
+ void draw_lightmap(const DrawingRequest& request) const;
+ void get_light(const DrawingRequest& request) const;
+ void do_take_screenshot();
+
DrawingRequests drawing_requests;
DrawingRequests lightmap_requests;
DrawingRequests* requests;
+ Color ambient_color;
SDL_Surface* screen;
Target target;
Texture* lightmap;
int lightmap_width, lightmap_height;
float lightmap_uv_right, lightmap_uv_bottom;
+
+ /* obstack holding the memory of the drawing requests */
+ struct obstack obst;
+
+ bool screenshot_requested; /**< true if a screenshot should be taken after the next frame has been rendered */
};
#endif
+