GDK Reference Manual

　　y : the y-coordinate of the origin.

gdk_gc_set_clip_origin ()
voidgdk_gc_set_clip_origin(GdkGC *gc,gint x,gint y); 

　　Sets the origin of the clip mask. The coordinates are interpreted relative to the upper-left corner of the destination drawable of the current operation.

　　gc : a GdkGC.

　　x : the x-coordinate of the origin.

　　y : the y-coordinate of the origin.

gdk_gc_set_clip_mask ()
voidgdk_gc_set_clip_mask(GdkGC *gc,GdkBitmap *mask); 

　　Sets the clip mask for a graphics context from a bitmap. The clip mask is interpreted relative to the clip origin. (See gdk_gc_set_clip_origin()).

　　gc : the GdkGC.

　　mask : a bitmap.

gdk_gc_set_clip_rectangle ()
voidgdk_gc_set_clip_rectangle (GdkGC *gc,GdkRectangle *rectangle); 

　　Sets the clip mask for a graphics context from a rectangle. The clip mask is interpreted relative to the clip origin. (See gdk_gc_set_clip_origin()).

　　gc : a GdkGC.

　　rectangle : the rectangle to clip to.

gdk_gc_set_clip_region ()
voidgdk_gc_set_clip_region(GdkGC *gc,GdkRegion *region); 

　　Sets the clip mask for a graphics context from a region structure. The clip mask is interpreted relative to the clip origin. (See gdk_gc_set_clip_origin()).

　　gc : a GdkGC.

　　region : the GdkRegion.

gdk_gc_set_subwindow ()
voidgdk_gc_set_subwindow(GdkGC *gc,GdkSubwindowMode mode); 

　　Sets how drawing with this GC on a window will affect child windows of that window.

　　gc : a GdkGC.

　　mode : the subwindow mode.

　　enum GdkSubwindowMode

typedef enum
{
GDK_CLIP_BY_CHILDREN= 0,
GDK_INCLUDE_INFERIORS = 1
} GdkSubwindowMode; 

　　Determines how drawing onto a window will affect child windows of that window.

　　GDK_CLIP_BY_CHILDREN only draw onto the window itself.

　　GDK_INCLUDE_INFERIORS Draw onto the window and child windows.

gdk_gc_set_exposures ()
voidgdk_gc_set_exposures(GdkGC *gc,gint exposures); 

　　Sets whether copying non-visible portions of a drawable using this graphics context generate exposure events for the corresponding regions of the destination drawable. (See gdk_draw_pixmap()).

　　gc : a GdkGC.

　　exposures : if TRUE, exposure events will be generated.

gdk_gc_set_line_attributes ()
voidgdk_gc_set_line_attributes(GdkGC *gc,
gint line_width,GdkLineStyle line_style,
GdkCapStyle cap_style,GdkJoinStyle join_style); 

　　Sets various attributes of how lines are drawn. See the corresponding members of GdkGCValues for full explanations of the arguments.

　　gc : a GdkGC.

　　line_width : the width of lines.

　　line_style : the dash-style for lines.

　　cap_style : the manner in which the ends of lines are drawn.

　　join_style : the in which lines are joined together.

　　enum GdkLineStyle

typedef enum
{
GDK_LINE_SOLID,
GDK_LINE_ON_OFF_DASH,
GDK_LINE_DOUBLE_DASH
} GdkLineStyle; 

　　Determines how lines are drawn.

　　GDK_LINE_SOLID lines are drawn solid.

　　GDK_LINE_ON_OFF_DASH even segments are drawn; odd segments are not drawn.

　　GDK_LINE_DOUBLE_DASH even segments are normally. Odd segments are drawn in the background color if the fill style is GDK_SOLID, or in the background color masked by the stipple if the fill style is GDK_STIPPLED.

　　enum GdkCapStyle

typedef enum
{
GDK_CAP_NOT_LAST,
GDK_CAP_BUTT,
GDK_CAP_ROUND,
GDK_CAP_PROJECTING
} GdkCapStyle; 

　　Determines how the end of lines are drawn.

　　GDK_CAP_NOT_LAST the same as GDK_CAP_BUTT for lines of non-zero width. for zero width lines, the final point on the line will not be drawn.