drawing.sgml

This GTK+ version 2.12.3. GTK+ is a multi-platform toolkit for creating graphical user interfaces.

<!-- ##### SECTION Title ##### -->
Drawing Primitives

<!-- ##### SECTION Short_Description ##### -->
Functions for drawing points, lines, arcs, and text

<!-- ##### SECTION Long_Description ##### -->
<para>
These functions provide support for drawing points, lines, arcs and text
onto what are called 'drawables'. Drawables, as the name suggests, are things
which support drawing onto them, and are either #GdkWindow or #GdkPixmap
objects.
</para>
<para>
Many of the drawing operations take a #GdkGC argument, which represents a
graphics context. This #GdkGC contains a number of drawing attributes such
as foreground color, background color and line width, and is used to reduce
the number of arguments needed for each drawing operation. See the
<link linkend="gdk-Graphics-Contexts">Graphics Contexts</link> section for
more information.
</para>
<para id="pango-data-structures">
Some of the drawing operations take Pango data structures like #PangoContext,
#PangoLayout or #PangoLayoutLine as arguments. If you're using GTK+, the ususal 
way to obtain these structures is via gtk_widget_create_pango_context() or
gtk_widget_create_pango_layout().
</para>

<!-- ##### SECTION See_Also ##### -->
<para>

</para>

<!-- ##### SECTION Stability_Level ##### -->


<!-- ##### STRUCT GdkDrawable ##### -->
<para>
An opaque structure representing an object that can be
drawn onto. This can be a #GdkPixmap, a #GdkBitmap,
or a #GdkWindow.
</para>


<!-- ##### FUNCTION gdk_drawable_ref ##### -->
<para>

</para>

@drawable: 
@Returns: 


<!-- ##### FUNCTION gdk_drawable_unref ##### -->
<para>

</para>

@drawable: 


<!-- ##### FUNCTION gdk_drawable_set_data ##### -->
<para>

</para>

@drawable: 
@key: 
@data: 
@destroy_func: 


<!-- ##### FUNCTION gdk_drawable_get_data ##### -->
<para>

</para>

@drawable: 
@key: 
@Returns: 


<!-- ##### FUNCTION gdk_drawable_get_display ##### -->
<para>

</para>

@drawable: 
@Returns: 


<!-- ##### FUNCTION gdk_drawable_get_screen ##### -->
<para>

</para>

@drawable: 
@Returns: 


<!-- ##### FUNCTION gdk_drawable_get_visual ##### -->
<para>

</para>

@drawable: 
@Returns: 


<!-- ##### FUNCTION gdk_drawable_set_colormap ##### -->
<para>

</para>

@drawable: 
@colormap: 


<!-- ##### FUNCTION gdk_drawable_get_colormap ##### -->
<para>

</para>

@drawable: 
@Returns: 


<!-- ##### FUNCTION gdk_drawable_get_depth ##### -->
<para>

</para>

@drawable: 
@Returns: 


<!-- ##### FUNCTION gdk_drawable_get_size ##### -->
<para>

</para>

@drawable: 
@width: 
@height: 


<!-- ##### FUNCTION gdk_drawable_get_clip_region ##### -->
<para>

</para>

@drawable: 
@Returns: 


<!-- ##### FUNCTION gdk_drawable_get_visible_region ##### -->
<para>

</para>

@drawable: 
@Returns: 


<!-- ##### FUNCTION gdk_draw_point ##### -->
<para>
</para>

@drawable: 
@gc: 
@x: 
@y: 


<!-- ##### FUNCTION gdk_draw_points ##### -->
<para>
</para>

@drawable: 
@gc: 
@points: 
@npoints: 


<!-- ##### FUNCTION gdk_draw_line ##### -->
<para>
</para>

@drawable: 
@gc: 
@x1_: 
@y1_: 
@x2_: 
@y2_: 


<!-- ##### FUNCTION gdk_draw_lines ##### -->
<para>
</para>

@drawable: 
@gc: 
@points: 
lines.
@npoints: 


<!-- ##### FUNCTION gdk_draw_pixbuf ##### -->
<para>

</para>

@drawable: 
@gc: 
@pixbuf: 
@src_x: 
@src_y: 
@dest_x: 
@dest_y: 
@width: 
@height: 
@dither: 
@x_dither: 
@y_dither: 


<!-- ##### FUNCTION gdk_draw_segments ##### -->
<para>
</para>

@drawable: 
@gc: 
@segs: 
@nsegs: 


<!-- ##### STRUCT GdkSegment ##### -->
<para>
Specifies the start and end point of a line for use by the gdk_draw_segments()
function.
</para>

@x1: the x coordinate of the start point.
@y1: the y coordinate of the start point.
@x2: the x coordinate of the end point.
@y2: the y coordinate of the end point.

<!-- ##### FUNCTION gdk_draw_rectangle ##### -->
<para>
</para>
<note>
<para>
</para>
</note>

@drawable: 
@gc: 
@filled: 
@x: 
@y: 
@width: 
@height: 


<!-- ##### FUNCTION gdk_draw_arc ##### -->
<para>
</para>

@drawable: 
@gc: 
@filled: 
@x: 
@y: 
@width: 
@height: 
@angle1: 
@angle2: 


<!-- ##### FUNCTION gdk_draw_polygon ##### -->
<para>
</para>

@drawable: 
@gc: 
@filled: 
@points: 
@npoints: 


<!-- ##### FUNCTION gdk_draw_trapezoids ##### -->
<para>

</para>

@drawable: 
@gc: 
@trapezoids: 
@n_trapezoids: 


<!-- ##### STRUCT GdkTrapezoid ##### -->
<para>
Specifies a trapezpoid for use by the gdk_draw_trapezoids().
The trapezoids used here have parallel, horizontal top and 
bottom edges. 
</para>

@y1: the y coordinate of the start point.
@x11: the x coordinate of the top left corner
@x21: the x coordinate of the top right corner
@y2: the y coordinate of the end point.
@x12: the x coordinate of the bottom left corner
@x22: the x coordinate of the bottom right corner

<!-- ##### FUNCTION gdk_draw_glyphs ##### -->
<para>

</para>

@drawable: 
@gc: 
@font: 
@x: 
@y: 
@glyphs: 


<!-- ##### FUNCTION gdk_draw_glyphs_transformed ##### -->
<para>

</para>

@drawable: 
@gc: 
@matrix: 
@font: 
@x: 
@y: 
@glyphs: 


<!-- ##### FUNCTION gdk_draw_layout_line ##### -->
<para>

</para>

@drawable: 
@gc: 
@x: 
@y: 
@line: 


<!-- ##### FUNCTION gdk_draw_layout_line_with_colors ##### -->
<para>

</para>

@drawable: 
@gc: 
@x: 
@y: 
@line: 
@foreground: 
@background: 


<!-- ##### FUNCTION gdk_draw_layout ##### -->
<para>

</para>

@drawable: 
@gc: 
@x: 
@y: 
@layout: 


<!-- ##### FUNCTION gdk_draw_layout_with_colors ##### -->
<para>

</para>

@drawable: 
@gc: 
@x: 
@y: 
@layout: 
@foreground: 
@background: 


<!-- ##### FUNCTION gdk_draw_string ##### -->
<para>
</para>

@drawable: 
@font: 
@gc: 
@x: 
@y: 
@string: 


<!-- ##### FUNCTION gdk_draw_text ##### -->
<para>
</para>

@drawable: 
@font: 
@gc: 
@x: 
@y: 
@text: 
@text_length: 


<!-- ##### FUNCTION gdk_draw_text_wc ##### -->
<para>
</para>

@drawable: 
@font: 
@gc: 
@x: 
@y: 
@text: 
@text_length: 


<!-- ##### MACRO gdk_draw_pixmap ##### -->
<para>
Draws a pixmap, or a part of a pixmap, onto another drawable.
</para>

@Deprecated: Use gdk_draw_drawable() instead.


<!-- ##### FUNCTION gdk_draw_drawable ##### -->
<para>

</para>

@drawable: 
@gc: 
@src: 
@xsrc: 
@ysrc: 
@xdest: 
@ydest: 
@width: 
@height: 


<!-- ##### FUNCTION gdk_draw_image ##### -->
<para>
</para>

@drawable: 
@gc: 
@image: 
@xsrc: 
@ysrc: 
@xdest: 
@ydest: 
@width: 
@height: 


<!-- ##### FUNCTION gdk_drawable_get_image ##### -->
<para>

</para>

@drawable: 
@x: 
@y: 
@width: 
@height: 
@Returns: 


<!-- ##### FUNCTION gdk_drawable_copy_to_image ##### -->
<para>

</para>

@drawable: 
@image: 
@src_x: 
@src_y: 
@dest_x: 
@dest_y: 
@width: 
@height: 
@Returns: