GScreenDC Class Reference

An implemenation of GSurface to draw onto the screen. More...

#include <Gdc2.h>

Inheritance diagram for GScreenDC:

List of all members.

Public Member Functions
	GScreenDC (GView *view, void *Param=0)
	Construct a wrapper to draw on a window.
	GScreenDC (int x, int y, int bits)
	Constructs a server size pixmap.
	GScreenDC (Gtk::GdkDrawable *Drawable)
	Constructs a wrapper around a drawable.
	GScreenDC (OsView View)
	Constructs a DC for drawing on a window.
void	GetOrigin (int &x, int &y)
	Gets the surface origin.
void	SetOrigin (int x, int y)
	Sets the surface origin.
COLOUR	Colour ()
	Gets the current colour.
COLOUR	Colour (COLOUR c, int Bits=0)
	Sets the current colour.
int	Op ()
	Gets the current blending mode in operation.
int	Op (int Op)
int	X ()
	Gets the width in pixels.
int	Y ()
	Gets the height in pixels.
int	GetBits ()
	Gets the bits per pixel.
GScreenDC *	IsScreen ()
	Returns true if the surface is on the screen.
uchar *	operator[] (int y)
	Returns a pointer to the start of a scanline, or NULL if not available.
void	Set (int x, int y)
	Sets a pixel with the current colour.
COLOUR	Get (int x, int y)
	Gets a pixel (doesn't work on some types of image, i.e. GScreenDC).
void	HLine (int x1, int x2, int y)
	Draw a horizontal line in the current colour.
void	VLine (int x, int y1, int y2)
	Draw a vertical line in the current colour.
void	Line (int x1, int y1, int x2, int y2)
	Draw a line in the current colour.
void	Circle (double cx, double cy, double radius)
	Stroke a circle in the current colour.
void	FilledCircle (double cx, double cy, double radius)
	Fill a circle in the current colour.
void	Arc (double cx, double cy, double radius, double start, double end)
	Stroke an arc in the current colour.
void	FilledArc (double cx, double cy, double radius, double start, double end)
	Fill an arc in the current colour.
void	Ellipse (double cx, double cy, double x, double y)
	Stroke an ellipse in the current colour.
void	FilledEllipse (double cx, double cy, double x, double y)
	Fill an ellipse in the current colour.
void	Box (int x1, int y1, int x2, int y2)
	Stroke a rectangle in the current colour.
void	Box (GRect *a)
	Stroke a rectangle in the current colour.
void	Rectangle (int x1, int y1, int x2, int y2)
	Fill a rectangle in the current colour.
void	Rectangle (GRect *a=NULL)
	Fill a rectangle in the current colour.
void	Blt (int x, int y, GSurface *Src, GRect *a=NULL)
	Copy an image onto the surface.
void	StretchBlt (GRect *d, GSurface *Src, GRect *s=NULL)
	Not implemented.
void	Polygon (int Points, GdcPt2 *Data)
	Fill a polygon in the current colour.
void	Bezier (int Threshold, GdcPt2 *Pt)
	Stroke a bezier in the current colour.
void	FloodFill (int x, int y, int Mode, COLOUR Border=0, GRect *Bounds=NULL)
	Flood fill in the current colour (doesn't work on a GScreenDC).

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Detailed Description

An implemenation of GSurface to draw onto the screen.

This is the class given to GView::OnPaint() most of the time. Which most of the time doesn't matter unless your doing something unusual.

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Member Function Documentation

int GScreenDC::Op

(

int

Op

)

[virtual]

Sets the current blending mode in operation

See also:

GDC_SET, GDC_AND, GDC_OR, GDC_XOR and GDC_ALPHA

Reimplemented from GSurface.

References GDC_AND, GDC_OR, GDC_SET, GDC_XOR, and Op().

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The documentation for this class was generated from the following files:

• Gdc2.h
• linux/Gtk/GScreenDC.cpp
• linux/Xcb/GScreenDC.cpp
• linux/Xlib/GScreenDC.cpp
• mac/Gdc2/GScreenDC.cpp
• win32/Gdc2/GScreenDC.cpp