public:
GLenum sfactor;
GLenum dfactor;
-
+
Blend()
: sfactor(GL_SRC_ALPHA), dfactor(GL_ONE_MINUS_SRC_ALPHA)
{}
~DrawingContext();
/// Adds a drawing request for a surface into the request list.
- void draw_surface(const Surface* surface, const Vector& position,
+ 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,
+ 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.
/// 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
void push_target();
void pop_target();
void set_target(Target target);
-
+
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
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;
-
+ Vector pos;
+
int layer;
DrawingEffect drawing_effect;
float alpha;
: angle(0.0f),
color(1.0f, 1.0f, 1.0f, 1.0f)
{}
-
+
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);
-
+
DrawingRequests drawing_requests;
DrawingRequests lightmap_requests;