Drawing Primitives

## Drawing Primitives Drawing Primitives — Functions for drawing points, lines, arcs, and text |

## Synopsis

    #include <gdk/gdk.h>

                        GdkDrawable;
    GdkDrawable *       gdk_drawable_ref                    (GdkDrawable *drawable);
    void                gdk_drawable_unref                  (GdkDrawable *drawable);
    void                gdk_drawable_set_data               (GdkDrawable *drawable,
                                                             const gchar *key,
                                                             gpointer data,
                                                             GDestroyNotify destroy_func);
    gpointer            gdk_drawable_get_data               (GdkDrawable *drawable,
                                                             const gchar *key);
    GdkDisplay *        gdk_drawable_get_display            (GdkDrawable *drawable);
    GdkScreen *         gdk_drawable_get_screen             (GdkDrawable *drawable);
    GdkVisual *         gdk_drawable_get_visual             (GdkDrawable *drawable);
    void                gdk_drawable_set_colormap           (GdkDrawable *drawable,
                                                             GdkColormap *colormap);
    GdkColormap *       gdk_drawable_get_colormap           (GdkDrawable *drawable);
    gint                gdk_drawable_get_depth              (GdkDrawable *drawable);
    void                gdk_drawable_get_size               (GdkDrawable *drawable,
                                                             gint *width,
                                                             gint *height);
    GdkRegion *         gdk_drawable_get_clip_region        (GdkDrawable *drawable);
    GdkRegion *         gdk_drawable_get_visible_region     (GdkDrawable *drawable);

    void                gdk_draw_point                      (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             gint x,
                                                             gint y);
    void                gdk_draw_points                     (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             const GdkPoint *points,
                                                             gint n_points);
    void                gdk_draw_line                       (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             gint x1_,
                                                             gint y1_,
                                                             gint x2_,
                                                             gint y2_);
    void                gdk_draw_lines                      (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             const GdkPoint *points,
                                                             gint n_points);
    void                gdk_draw_pixbuf                     (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             const GdkPixbuf *pixbuf,
                                                             gint src_x,
                                                             gint src_y,
                                                             gint dest_x,
                                                             gint dest_y,
                                                             gint width,
                                                             gint height,
                                                             GdkRgbDither dither,
                                                             gint x_dither,
                                                             gint y_dither);
    void                gdk_draw_segments                   (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             const GdkSegment *segs,
                                                             gint n_segs);
    struct              GdkSegment;
    void                gdk_draw_rectangle                  (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             gboolean filled,
                                                             gint x,
                                                             gint y,
                                                             gint width,
                                                             gint height);
    void                gdk_draw_arc                        (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             gboolean filled,
                                                             gint x,
                                                             gint y,
                                                             gint width,
                                                             gint height,
                                                             gint angle1,
                                                             gint angle2);
    void                gdk_draw_polygon                    (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             gboolean filled,
                                                             const GdkPoint *points,
                                                             gint n_points);
    void                gdk_draw_trapezoids                 (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             const GdkTrapezoid *trapezoids,
                                                             gint n_trapezoids);
    struct              GdkTrapezoid;
    void                gdk_draw_glyphs                     (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             PangoFont *font,
                                                             gint x,
                                                             gint y,
                                                             PangoGlyphString *glyphs);
    void                gdk_draw_glyphs_transformed         (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             const PangoMatrix *matrix,
                                                             PangoFont *font,
                                                             gint x,
                                                             gint y,
                                                             PangoGlyphString *glyphs);
    void                gdk_draw_layout_line                (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             gint x,
                                                             gint y,
                                                             PangoLayoutLine *line);
    void                gdk_draw_layout_line_with_colors    (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             gint x,
                                                             gint y,
                                                             PangoLayoutLine *line,
                                                             const GdkColor *foreground,
                                                             const GdkColor *background);
    void                gdk_draw_layout                     (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             gint x,
                                                             gint y,
                                                             PangoLayout *layout);
    void                gdk_draw_layout_with_colors         (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             gint x,
                                                             gint y,
                                                             PangoLayout *layout,
                                                             const GdkColor *foreground,
                                                             const GdkColor *background);

    void                gdk_draw_string                     (GdkDrawable *drawable,
                                                             GdkFont *font,
                                                             GdkGC *gc,
                                                             gint x,
                                                             gint y,
                                                             const gchar *string);
    void                gdk_draw_text                       (GdkDrawable *drawable,
                                                             GdkFont *font,
                                                             GdkGC *gc,
                                                             gint x,
                                                             gint y,
                                                             const gchar *text,
                                                             gint text_length);
    void                gdk_draw_text_wc                    (GdkDrawable *drawable,
                                                             GdkFont *font,
                                                             GdkGC *gc,
                                                             gint x,
                                                             gint y,
                                                             const GdkWChar *text,
                                                             gint text_length);

    #define             gdk_draw_pixmap
    void                gdk_draw_drawable                   (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             GdkDrawable *src,
                                                             gint xsrc,
                                                             gint ysrc,
                                                             gint xdest,
                                                             gint ydest,
                                                             gint width,
                                                             gint height);
    void                gdk_draw_image                      (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             GdkImage *image,
                                                             gint xsrc,
                                                             gint ysrc,
                                                             gint xdest,
                                                             gint ydest,
                                                             gint width,
                                                             gint height);
    GdkImage *          gdk_drawable_get_image              (GdkDrawable *drawable,
                                                             gint x,
                                                             gint y,
                                                             gint width,
                                                             gint height);
    GdkImage *          gdk_drawable_copy_to_image          (GdkDrawable *drawable,
                                                             GdkImage *image,
                                                             gint src_x,
                                                             gint src_y,
                                                             gint dest_x,
                                                             gint dest_y,
                                                             gint width,
                                                             gint height);

## Object Hierarchy

      GObject
       +----GdkDrawable
             +----GdkWindow
             +----GdkPixmap

## Description

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.

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 Graphics Contexts section for more information.

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()`.

## Details

### GdkDrawable

    typedef struct _GdkDrawable GdkDrawable;

An opaque structure representing an object that can be drawn onto. This can be a GdkPixmap, a GdkBitmap, or a GdkWindow.

### gdk_drawable_ref ()

    GdkDrawable *       gdk_drawable_ref                    (GdkDrawable *drawable);

### Warning

`gdk_drawable_ref` has been deprecated since version 2.0 and should not be used in newly-written code. Use `g_object_ref()` instead.

Deprecated equivalent of calling `g_object_ref()` on `drawable`. (Drawables were not objects in previous versions of GDK.)

`drawable` : | a GdkDrawable
Returns : | the same `drawable` passed in

### gdk_drawable_unref ()

    void                gdk_drawable_unref                  (GdkDrawable *drawable);

### Warning

`gdk_drawable_unref` has been deprecated since version 2.0 and should not be used in newly-written code. Use `g_object_unref()` instead.

Deprecated equivalent of calling `g_object_unref()` on `drawable`.

`drawable` : | a GdkDrawable

### gdk_drawable_set_data ()

    void                gdk_drawable_set_data               (GdkDrawable *drawable,
                                                             const gchar *key,
                                                             gpointer data,
                                                             GDestroyNotify destroy_func);

### Warning

`gdk_drawable_set_data` is deprecated and should not be used in newly-written code.

This function is equivalent to `g_object_set_data()`, the GObject variant should be used instead.

`drawable` : | a GdkDrawable
`key` : | name to store the data under
`data` : | arbitrary data
`destroy_func` : | function to free `data`, or `NULL`. [allow-none]

### gdk_drawable_get_data ()

    gpointer            gdk_drawable_get_data               (GdkDrawable *drawable,
                                                             const gchar *key);

### Warning

`gdk_drawable_get_data` is deprecated and should not be used in newly-written code.

Equivalent to `g_object_get_data()`; the GObject variant should be used instead.

`drawable` : | a GdkDrawable
`key` : | name the data was stored under
Returns : | the data stored at `key`

### gdk_drawable_get_display ()

    GdkDisplay *        gdk_drawable_get_display            (GdkDrawable *drawable);

### Warning

`gdk_drawable_get_display` has been deprecated since version 2.24 and should not be used in newly-written code. Use `gdk_window_get_display()` instead

Gets the GdkDisplay associated with a GdkDrawable.

`drawable` : | a GdkDrawable
Returns : | the GdkDisplay associated with `drawable`

Since 2.2

### gdk_drawable_get_screen ()

    GdkScreen *         gdk_drawable_get_screen             (GdkDrawable *drawable);

### Warning

`gdk_drawable_get_screen` has been deprecated since version 2.24 and should not be used in newly-written code. Use `gdk_window_get_screen()` instead

Gets the GdkScreen associated with a GdkDrawable.

`drawable` : | a GdkDrawable
Returns : | the GdkScreen associated with `drawable`

Since 2.2

### gdk_drawable_get_visual ()

    GdkVisual *         gdk_drawable_get_visual             (GdkDrawable *drawable);

### Warning

`gdk_drawable_get_visual` has been deprecated since version 2.24 and should not be used in newly-written code. Use `gdk_window_get_visual()`

Gets the GdkVisual describing the pixel format of `drawable`.

`drawable` : | a GdkDrawable
Returns : | a GdkVisual

### gdk_drawable_set_colormap ()

    void                gdk_drawable_set_colormap           (GdkDrawable *drawable,
                                                             GdkColormap *colormap);

Sets the colormap associated with `drawable`. Normally this will happen automatically when the drawable is created; you only need to use this function if the drawable-creating function did not have a way to determine the colormap, and you then use drawable operations that require a colormap. The colormap for all drawables and graphics contexts you intend to use together should match. i.e. when using a GdkGC to draw to a drawable, or copying one drawable to another, the colormaps should match.

`drawable` : | a GdkDrawable
`colormap` : | a GdkColormap

### gdk_drawable_get_colormap ()

    GdkColormap *       gdk_drawable_get_colormap           (GdkDrawable *drawable);

Gets the colormap for `drawable`, if one is set; returns `NULL` otherwise.

`drawable` : | a GdkDrawable
Returns : | the colormap, or `NULL`

### gdk_drawable_get_depth ()

    gint                gdk_drawable_get_depth              (GdkDrawable *drawable);

Obtains the bit depth of the drawable, that is, the number of bits that make up a pixel in the drawable's visual. Examples are 8 bits per pixel, 24 bits per pixel, etc.

`drawable` : | a GdkDrawable
Returns : | number of bits per pixel

### gdk_drawable_get_size ()

    void                gdk_drawable_get_size               (GdkDrawable *drawable,
                                                             gint *width,
                                                             gint *height);

### Warning

`gdk_drawable_get_size` has been deprecated since version 2.24 and should not be used in newly-written code. Use `gdk_window_get_width()` and `gdk_window_get_height()` for GdkWindows. Use `gdk_pixmap_get_size()` for GdkPixmaps.

Fills *`width` and *`height` with the size of `drawable`. `width` or `height` can be `NULL` if you only want the other one.

On the X11 platform, if `drawable` is a GdkWindow, the returned size is the size reported in the most-recently-processed configure event, rather than the current size on the X server.

`drawable` : | a GdkDrawable
`width` : | location to store drawable's width, or `NULL`. [out][allow-none]
`height` : | location to store drawable's height, or `NULL`. [out][allow-none]

### gdk_drawable_get_clip_region ()

    GdkRegion *         gdk_drawable_get_clip_region        (GdkDrawable *drawable);

Computes the region of a drawable that potentially can be written to by drawing primitives. This region will not take into account the clip region for the GC, and may also not take into account other factors such as if the window is obscured by other windows, but no area outside of this region will be affected by drawing primitives.

`drawable` : | a GdkDrawable
Returns : | a GdkRegion. This must be freed with `gdk_region_destroy()` when you are done.

### gdk_drawable_get_visible_region ()

    GdkRegion *         gdk_drawable_get_visible_region     (GdkDrawable *drawable);

Computes the region of a drawable that is potentially visible. This does not necessarily take into account if the window is obscured by other windows, but no area outside of this region is visible.

`drawable` : | a GdkDrawable
Returns : | a GdkRegion. This must be freed with `gdk_region_destroy()` when you are done.

### gdk_draw_point ()

    void                gdk_draw_point                      (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             gint x,
                                                             gint y);

### Warning

`gdk_draw_point` has been deprecated since version 2.22 and should not be used in newly-written code. Use `cairo_rectangle()` and `cairo_fill()` or `cairo_move_to()` and `cairo_stroke()` instead.

Draws a point, using the foreground color and other attributes of the GdkGC.

`drawable` : | a GdkDrawable (a GdkWindow or a GdkPixmap).
`gc` : | a GdkGC.
`x` : | the x coordinate of the point.
`y` : | the y coordinate of the point.

### gdk_draw_points ()

    void                gdk_draw_points                     (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             const GdkPoint *points,
                                                             gint n_points);

### Warning

`gdk_draw_points` has been deprecated since version 2.22 and should not be used in newly-written code. Use `n_points` calls to `cairo_rectangle()` and `cairo_fill()` instead.

Draws a number of points, using the foreground color and other attributes of the GdkGC.

`drawable` : | a GdkDrawable (a GdkWindow or a GdkPixmap).
`gc` : | a GdkGC.
`points` : | an array of GdkPoint structures.
`n_points` : | the number of points to be drawn.

### gdk_draw_line ()

    void                gdk_draw_line                       (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             gint x1_,
                                                             gint y1_,
                                                             gint x2_,
                                                             gint y2_);

### Warning

`gdk_draw_line` has been deprecated since version 2.22 and should not be used in newly-written code. Use `cairo_line_to()` and `cairo_stroke()` instead. Be aware that the default line width in Cairo is 2 pixels and that your coordinates need to describe the center of the line. To draw a single pixel wide pixel-aligned line, you would use:

    cairo_set_line_width (cr, 1.0);
    cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
    cairo_move_to (cr, 0.5, 0.5);
    cairo_line_to (cr, 9.5, 0.5);
    cairo_stroke (cr);

See also the Cairo FAQ on this topic.

Draws a line, using the foreground color and other attributes of the GdkGC.

`drawable` : | a GdkDrawable (a GdkWindow or a GdkPixmap).
`gc` : | a GdkGC.
`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.

### gdk_draw_lines ()

    void                gdk_draw_lines                      (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             const GdkPoint *points,
                                                             gint n_points);

### Warning

`gdk_draw_lines` has been deprecated since version 2.22 and should not be used in newly-written code. Use `cairo_line_to()` and `cairo_stroke()` instead. See the documentation of `gdk_draw_line()` for notes on line drawing with Cairo.

Draws a series of lines connecting the given points. The way in which joins between lines are draw is determined by the GdkCapStyle value in the GdkGC. This can be set with `gdk_gc_set_line_attributes()`.

`drawable` : | a GdkDrawable (a GdkWindow or a GdkPixmap).
`gc` : | a GdkGC.
`points` : | an array of GdkPoint structures specifying the endpoints of the
`n_points` : | the size of the `points` array.

### gdk_draw_pixbuf ()

    void                gdk_draw_pixbuf                     (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             const GdkPixbuf *pixbuf,
                                                             gint src_x,
                                                             gint src_y,
                                                             gint dest_x,
                                                             gint dest_y,
                                                             gint width,
                                                             gint height,
                                                             GdkRgbDither dither,
                                                             gint x_dither,
                                                             gint y_dither);

### Warning

`gdk_draw_pixbuf` has been deprecated since version 2.22 and should not be used in newly-written code. Use `gdk_cairo_set_source_pixbuf()` and `cairo_paint()` or `cairo_rectangle()` and `cairo_fill()` instead.

Renders a rectangular portion of a pixbuf to a drawable. The destination drawable must have a colormap. All windows have a colormap, however, pixmaps only have colormap by default if they were created with a non-`NULL` window argument. Otherwise a colormap must be set on them with `gdk_drawable_set_colormap()`.

On older X servers, rendering pixbufs with an alpha channel involves round trips to the X server, and may be somewhat slow.

If GDK is built with the Sun mediaLib library, the gdk_draw_pixbuf function is accelerated using mediaLib, which provides hardware acceleration on Intel, AMD, and Sparc chipsets. If desired, mediaLib support can be turned off by setting the GDK_DISABLE_MEDIALIB environment variable.

`drawable` : | Destination drawable.
`gc` : | a GdkGC, used for clipping, or `NULL`. [allow-none]
`pixbuf` : | a GdkPixbuf
`src_x` : | Source X coordinate within pixbuf.
`src_y` : | Source Y coordinates within pixbuf.
`dest_x` : | Destination X coordinate within drawable.
`dest_y` : | Destination Y coordinate within drawable.
`width` : | Width of region to render, in pixels, or -1 to use pixbuf width.
`height` : | Height of region to render, in pixels, or -1 to use pixbuf height.
`dither` : | Dithering mode for GdkRGB.
`x_dither` : | X offset for dither.
`y_dither` : | Y offset for dither.

Since 2.2

### gdk_draw_segments ()

    void                gdk_draw_segments                   (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             const GdkSegment *segs,
                                                             gint n_segs);

### Warning

`gdk_draw_segments` has been deprecated since version 2.22 and should not be used in newly-written code. Use `cairo_move_to()`, `cairo_line_to()` and `cairo_stroke()` instead. See the documentation of `gdk_draw_line()` for notes on line drawing with Cairo.

Draws a number of unconnected lines.

`drawable` : | a GdkDrawable (a GdkWindow or a GdkPixmap).
`gc` : | a GdkGC.
`segs` : | an array of GdkSegment structures specifying the start and end points of the lines to be drawn.
`n_segs` : | the number of line segments to draw, i.e. the size of the `segs` array.

### struct GdkSegment

    struct GdkSegment {
      gint x1;
      gint y1;
      gint x2;
      gint y2;
    };

Specifies the start and end point of a line for use by the `gdk_draw_segments()` function.

gint `x1`; | the x coordinate of the start point.
gint `y1`; | the y coordinate of the start point.
gint `x2`; | the x coordinate of the end point.
gint `y2`; | the y coordinate of the end point.

### gdk_draw_rectangle ()

    void                gdk_draw_rectangle                  (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             gboolean filled,
                                                             gint x,
                                                             gint y,
                                                             gint width,
                                                             gint height);

### Warning

`gdk_draw_rectangle` has been deprecated since version 2.22 and should not be used in newly-written code. Use `cairo_rectangle()` and `cairo_fill()` or `cairo_stroke()` instead. For stroking, the same caveats for converting code apply as for `gdk_draw_line()`.

Draws a rectangular outline or filled rectangle, using the foreground color and other attributes of the GdkGC.

A rectangle drawn filled is 1 pixel smaller in both dimensions than a rectangle outlined. Calling `gdk_draw_rectangle (window, gc, TRUE, 0, 0, 20, 20)` results in a filled rectangle 20 pixels wide and 20 pixels high. Calling `gdk_draw_rectangle (window, gc, FALSE, 0, 0, 20, 20)` results in an outlined rectangle with corners at (0, 0), (0, 20), (20, 20), and (20, 0), which makes it 21 pixels wide and 21 pixels high.

### Note

`drawable` : | a GdkDrawable (a GdkWindow or a GdkPixmap).
`gc` : | a GdkGC.
`filled` : | `TRUE` if the rectangle should be filled.
`x` : | the x coordinate of the left edge of the rectangle.
`y` : | the y coordinate of the top edge of the rectangle.
`width` : | the width of the rectangle.
`height` : | the height of the rectangle.

### gdk_draw_arc ()

    void                gdk_draw_arc                        (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             gboolean filled,
                                                             gint x,
                                                             gint y,
                                                             gint width,
                                                             gint height,
                                                             gint angle1,
                                                             gint angle2);

### Warning

`gdk_draw_arc` has been deprecated since version 2.22 and should not be used in newly-written code. Use `cairo_arc()` and `cairo_fill()` or `cairo_stroke()` instead. Note that arcs just like any drawing operation in Cairo are antialiased unless you call `cairo_set_antialias()`.

Draws an arc or a filled 'pie slice'. The arc is defined by the bounding rectangle of the entire ellipse, and the start and end angles of the part of the ellipse to be drawn.

`drawable` : | a GdkDrawable (a GdkWindow or a GdkPixmap).
`gc` : | a GdkGC.
`filled` : | `TRUE` if the arc should be filled, producing a 'pie slice'.
`x` : | the x coordinate of the left edge of the bounding rectangle.
`y` : | the y coordinate of the top edge of the bounding rectangle.
`width` : | the width of the bounding rectangle.
`height` : | the height of the bounding rectangle.
`angle1` : | the start angle of the arc, relative to the 3 o'clock position, counter-clockwise, in 1/64ths of a degree.
`angle2` : | the end angle of the arc, relative to `angle1`, in 1/64ths of a degree.

### gdk_draw_polygon ()

    void                gdk_draw_polygon                    (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             gboolean filled,
                                                             const GdkPoint *points,
                                                             gint n_points);

### Warning

`gdk_draw_polygon` has been deprecated since version 2.22 and should not be used in newly-written code. Use `cairo_line_to()` or `cairo_append_path()` and `cairo_fill()` or `cairo_stroke()` instead.

Draws an outlined or filled polygon.

`drawable` : | a GdkDrawable (a GdkWindow or a GdkPixmap).
`gc` : | a GdkGC.
`filled` : | `TRUE` if the polygon should be filled. The polygon is closed automatically, connecting the last point to the first point if necessary.
`points` : | an array of GdkPoint structures specifying the points making up the polygon.
`n_points` : | the number of points.

### gdk_draw_trapezoids ()

    void                gdk_draw_trapezoids                 (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             const GdkTrapezoid *trapezoids,
                                                             gint n_trapezoids);

### Warning

`gdk_draw_trapezoids` has been deprecated since version 2.22 and should not be used in newly-written code. Use Cairo path contruction functions and `cairo_fill()` instead.

Draws a set of anti-aliased trapezoids. The trapezoids are combined using saturation addition, then drawn over the background as a set. This is low level functionality used internally to implement rotated underlines and backgrouds when rendering a PangoLayout and is likely not useful for applications.

`drawable` : | a GdkDrawable
`gc` : | a GdkGC
`trapezoids` : | an array of GdkTrapezoid structures
`n_trapezoids` : | the number of trapezoids to draw

Since 2.6

### struct GdkTrapezoid

    struct GdkTrapezoid {
      double y1, x11, x21, y2, x12, x22;
    };

Specifies a trapezpoid for use by the `gdk_draw_trapezoids()`. The trapezoids used here have parallel, horizontal top and bottom edges.

double `y1`; | the y coordinate of the start point.
double `x11`; | the x coordinate of the top left corner
double `x21`; | the x coordinate of the top right corner
double `y2`; | the y coordinate of the end point.
double `x12`; | the x coordinate of the bottom left corner
double `x22`; | the x coordinate of the bottom right corner

### gdk_draw_glyphs ()

    void                gdk_draw_glyphs                     (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             PangoFont *font,
                                                             gint x,
                                                             gint y,
                                                             PangoGlyphString *glyphs);

### Warning

`gdk_draw_glyphs` has been deprecated since version 2.22 and should not be used in newly-written code. Use `pango_cairo_show_glyphs()` instead.

This is a low-level function; 99% of text rendering should be done using `gdk_draw_layout()` instead.

A glyph is a single image in a font. This function draws a sequence of glyphs. To obtain a sequence of glyphs you have to understand a lot about internationalized text handling, which you don't want to understand; thus, use `gdk_draw_layout()` instead of this function, `gdk_draw_layout()` handles the details.

`drawable` : | a GdkDrawable
`gc` : | a GdkGC
`font` : | font to be used
`x` : | X coordinate of baseline origin
`y` : | Y coordinate of baseline origin
`glyphs` : | the glyph string to draw

### gdk_draw_glyphs_transformed ()

    void                gdk_draw_glyphs_transformed         (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             const PangoMatrix *matrix,
                                                             PangoFont *font,
                                                             gint x,
                                                             gint y,
                                                             PangoGlyphString *glyphs);

### Warning

`gdk_draw_glyphs_transformed` has been deprecated since version 2.22 and should not be used in newly-written code. Use `pango_cairo_show_glyphs()` instead.

Renders a PangoGlyphString onto a drawable, possibly transforming the layed-out coordinates through a transformation matrix. Note that the transformation matrix for `font` is not changed, so to produce correct rendering results, the `font` must have been loaded using a PangoContext with an identical transformation matrix to that passed in to this function.

See also `gdk_draw_glyphs()`, `gdk_draw_layout()`.

`drawable` : | a GdkDrawable
`gc` : | a GdkGC
`matrix` : | a PangoMatrix, or `NULL` to use an identity transformation. [allow-none]
`font` : | the font in which to draw the string
`x` : | the x position of the start of the string (in Pango units in user space coordinates)
`y` : | the y position of the baseline (in Pango units in user space coordinates)
`glyphs` : | the glyph string to draw

Since 2.6

### gdk_draw_layout_line ()

    void                gdk_draw_layout_line                (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             gint x,
                                                             gint y,
                                                             PangoLayoutLine *line);

### Warning

`gdk_draw_layout_line` is deprecated and should not be used in newly-written code.

Render a PangoLayoutLine onto an GDK drawable

If the layout's PangoContext has a transformation matrix set, then `x` and `y` specify the position of the left edge of the baseline (left is in before-tranform user coordinates) in after-transform device coordinates.

`drawable` : | the drawable on which to draw the line
`gc` : | base graphics to use
`x` : | the x position of start of string (in pixels)
`y` : | the y position of baseline (in pixels)
`line` : | a PangoLayoutLine

### gdk_draw_layout_line_with_colors ()

    void                gdk_draw_layout_line_with_colors    (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             gint x,
                                                             gint y,
                                                             PangoLayoutLine *line,
                                                             const GdkColor *foreground,
                                                             const GdkColor *background);

### Warning

`gdk_draw_layout_line_with_colors` is deprecated and should not be used in newly-written code.

Render a PangoLayoutLine onto a GdkDrawable, overriding the layout's normal colors with `foreground` and/or `background`. `foreground` and `background` need not be allocated.

If the layout's PangoContext has a transformation matrix set, then `x` and `y` specify the position of the left edge of the baseline (left is in before-tranform user coordinates) in after-transform device coordinates.

`drawable` : | the drawable on which to draw the line
`gc` : | base graphics to use
`x` : | the x position of start of string (in pixels)
`y` : | the y position of baseline (in pixels)
`line` : | a PangoLayoutLine
`foreground` : | foreground override color, or `NULL` for none. [allow-none]
`background` : | background override color, or `NULL` for none. [allow-none]

### gdk_draw_layout ()

    void                gdk_draw_layout                     (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             gint x,
                                                             gint y,
                                                             PangoLayout *layout);

### Warning

`gdk_draw_layout` is deprecated and should not be used in newly-written code.

Render a PangoLayout onto a GDK drawable

If the layout's PangoContext has a transformation matrix set, then `x` and `y` specify the position of the top left corner of the bounding box (in device space) of the transformed layout.

If you're using GTK+, the usual way to obtain a PangoLayout is `gtk_widget_create_pango_layout()`.

`drawable` : | the drawable on which to draw string
`gc` : | base graphics context to use
`x` : | the X position of the left of the layout (in pixels)
`y` : | the Y position of the top of the layout (in pixels)
`layout` : | a PangoLayout

### gdk_draw_layout_with_colors ()

    void                gdk_draw_layout_with_colors         (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             gint x,
                                                             gint y,
                                                             PangoLayout *layout,
                                                             const GdkColor *foreground,
                                                             const GdkColor *background);

### Warning

`gdk_draw_layout_with_colors` is deprecated and should not be used in newly-written code.

Render a PangoLayout onto a GdkDrawable, overriding the layout's normal colors with `foreground` and/or `background`. `foreground` and `background` need not be allocated.

If the layout's PangoContext has a transformation matrix set, then `x` and `y` specify the position of the top left corner of the bounding box (in device space) of the transformed layout.

If you're using GTK+, the ususal way to obtain a PangoLayout is `gtk_widget_create_pango_layout()`.

`drawable` : | the drawable on which to draw string
`gc` : | base graphics context to use
`x` : | the X position of the left of the layout (in pixels)
`y` : | the Y position of the top of the layout (in pixels)
`layout` : | a PangoLayout
`foreground` : | foreground override color, or `NULL` for none. [allow-none]
`background` : | background override color, or `NULL` for none. [allow-none]

### gdk_draw_string ()

    void                gdk_draw_string                     (GdkDrawable *drawable,
                                                             GdkFont *font,
                                                             GdkGC *gc,
                                                             gint x,
                                                             gint y,
                                                             const gchar *string);

### Warning

`gdk_draw_string` has been deprecated since version 2.4 and should not be used in newly-written code. Use `gdk_draw_layout()` instead.

Draws a string of characters in the given font or fontset.

`drawable` : | a GdkDrawable (a GdkWindow or a GdkPixmap).
`font` : | a GdkFont.
`gc` : | a GdkGC.
`x` : | the x coordinate of the left edge of the text.
`y` : | the y coordinate of the baseline of the text.
`string` : | the string of characters to draw.

### gdk_draw_text ()

    void                gdk_draw_text                       (GdkDrawable *drawable,
                                                             GdkFont *font,
                                                             GdkGC *gc,
                                                             gint x,
                                                             gint y,
                                                             const gchar *text,
                                                             gint text_length);

### Warning

`gdk_draw_text` has been deprecated since version 2.4 and should not be used in newly-written code. Use `gdk_draw_layout()` instead.

Draws a number of characters in the given font or fontset.

`drawable` : | a GdkDrawable (a GdkWindow or a GdkPixmap).
`font` : | a GdkFont.
`gc` : | a GdkGC.
`x` : | the x coordinate of the left edge of the text.
`y` : | the y coordinate of the baseline of the text.
`text` : | the characters to draw.
`text_length` : | the number of characters of `text` to draw.

### gdk_draw_text_wc ()

    void                gdk_draw_text_wc                    (GdkDrawable *drawable,
                                                             GdkFont *font,
                                                             GdkGC *gc,
                                                             gint x,
                                                             gint y,
                                                             const GdkWChar *text,
                                                             gint text_length);

### Warning

`gdk_draw_text_wc` has been deprecated since version 2.4 and should not be used in newly-written code. Use `gdk_draw_layout()` instead.

Draws a number of wide characters using the given font of fontset. If the font is a 1-byte font, the string is converted into 1-byte characters (discarding the high bytes) before output.

`drawable` : | a GdkDrawable (a GdkWindow or a GdkPixmap).
`font` : | a GdkFont.
`gc` : | a GdkGC.
`x` : | the x coordinate of the left edge of the text.
`y` : | the y coordinate of the baseline of the text.
`text` : | the wide characters to draw.
`text_length` : | the number of characters to draw.

### gdk_draw_pixmap

    #define gdk_draw_pixmap                gdk_draw_drawable

### Warning

`gdk_draw_pixmap` is deprecated and should not be used in newly-written code. Use `gdk_draw_drawable()` instead.

Draws a pixmap, or a part of a pixmap, onto another drawable.

### gdk_draw_drawable ()

    void                gdk_draw_drawable                   (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             GdkDrawable *src,
                                                             gint xsrc,
                                                             gint ysrc,
                                                             gint xdest,
                                                             gint ydest,
                                                             gint width,
                                                             gint height);

### Warning

`gdk_draw_drawable` has been deprecated since version 2.22 and should not be used in newly-written code. Use `gdk_cairo_set_source_pixmap()`, `cairo_rectangle()` and `cairo_fill()` to draw pixmap on top of other drawables. Also keep in mind that the limitations on allowed sources do not apply to Cairo.

Copies the `width` x `height` region of `src` at coordinates (`xsrc`, `ysrc`) to coordinates (`xdest`, `ydest`) in `drawable`. `width` and/or `height` may be given as -1, in which case the entire `src` drawable will be copied.

Most fields in `gc` are not used for this operation, but notably the clip mask or clip region will be honored.

The source and destination drawables must have the same visual and colormap, or errors will result. (On X11, failure to match visual/colormap results in a BadMatch error from the X server.) A common cause of this problem is an attempt to draw a bitmap to a color drawable. The way to draw a bitmap is to set the bitmap as the stipple on the GdkGC, set the fill mode to `GDK_STIPPLED`, and then draw the rectangle.

`drawable` : | a GdkDrawable
`gc` : | a GdkGC sharing the drawable's visual and colormap
`src` : | the source GdkDrawable, which may be the same as `drawable`
`xsrc` : | X position in `src` of rectangle to draw
`ysrc` : | Y position in `src` of rectangle to draw
`xdest` : | X position in `drawable` where the rectangle should be drawn
`ydest` : | Y position in `drawable` where the rectangle should be drawn
`width` : | width of rectangle to draw, or -1 for entire `src` width
`height` : | height of rectangle to draw, or -1 for entire `src` height

### gdk_draw_image ()

    void                gdk_draw_image                      (GdkDrawable *drawable,
                                                             GdkGC *gc,
                                                             GdkImage *image,
                                                             gint xsrc,
                                                             gint ysrc,
                                                             gint xdest,
                                                             gint ydest,
                                                             gint width,
                                                             gint height);

### Warning

`gdk_draw_image` has been deprecated since version 2.22 and should not be used in newly-written code. Do not use GdkImage anymore, instead use Cairo image surfaces.

Draws a GdkImage onto a drawable. The depth of the GdkImage must match the depth of the GdkDrawable.

`drawable` : | a GdkDrawable (a GdkWindow or a GdkPixmap).
`gc` : | a GdkGC.
`image` : | the GdkImage to draw.
`xsrc` : | the left edge of the source rectangle within `image`.
`ysrc` : | the top of the source rectangle within `image`.
`xdest` : | the x coordinate of the destination within `drawable`.
`ydest` : | the y coordinate of the destination within `drawable`.
`width` : | the width of the area to be copied, or -1 to make the area extend to the right edge of `image`.
`height` : | the height of the area to be copied, or -1 to make the area extend to the bottom edge of `image`.

### gdk_drawable_get_image ()

    GdkImage *          gdk_drawable_get_image              (GdkDrawable *drawable,
                                                             gint x,
                                                             gint y,
                                                             gint width,
                                                             gint height);

### Warning

`gdk_drawable_get_image` has been deprecated since version 2.22 and should not be used in newly-written code. Use `drawable` as the source and draw to a Cairo image surface if you want to download contents to the client.

A GdkImage stores client-side image data (pixels). In contrast, GdkPixmap and GdkWindow are server-side objects. `gdk_drawable_get_image()` obtains the pixels from a server-side drawable as a client-side GdkImage. The format of a GdkImage depends on the GdkVisual of the current display, which makes manipulating GdkImage extremely difficult; therefore, in most cases you should use `gdk_pixbuf_get_from_drawable()` instead of this lower-level function. A GdkPixbuf contains image data in a canonicalized RGB format, rather than a display-dependent format. Of course, there's a convenience vs. speed tradeoff here, so you'll want to think about what makes sense for your application.

`x`, `y`, `width`, and `height` define the region of `drawable` to obtain as an image.

You would usually copy image data to the client side if you intend to examine the values of individual pixels, for example to darken an image or add a red tint. It would be prohibitively slow to make a round-trip request to the windowing system for each pixel, so instead you get all of them at once, modify them, then copy them all back at once.

If the X server or other windowing system backend is on the local machine, this function may use shared memory to avoid copying the image data.

If the source drawable is a GdkWindow and partially offscreen or obscured, then the obscured portions of the returned image will contain undefined data.

`drawable` : | a GdkDrawable
`x` : | x coordinate on `drawable`
`y` : | y coordinate on `drawable`
`width` : | width of region to get
`height` : | height or region to get
Returns : | a GdkImage containing the contents of `drawable`

### gdk_drawable_copy_to_image ()

    GdkImage *          gdk_drawable_copy_to_image          (GdkDrawable *drawable,
                                                             GdkImage *image,
                                                             gint src_x,
                                                             gint src_y,
                                                             gint dest_x,
                                                             gint dest_y,
                                                             gint width,
                                                             gint height);

### Warning

`gdk_drawable_copy_to_image` has been deprecated since version 2.22 and should not be used in newly-written code. Use `drawable` as the source and draw to a Cairo image surface if you want to download contents to the client.

Copies a portion of `drawable` into the client side image structure `image`. If `image` is `NULL`, creates a new image of size `width` x `height` and copies into that. See `gdk_drawable_get_image()` for further details.

`drawable` : | a GdkDrawable
`image` : | a GdkDrawable, or `NULL` if a new `image` should be created. [allow-none]
`src_x` : | x coordinate on `drawable`
`src_y` : | y coordinate on `drawable`
`dest_x` : | x coordinate within `image`. Must be 0 if `image` is `NULL`
`dest_y` : | y coordinate within `image`. Must be 0 if `image` is `NULL`
`width` : | width of region to get
`height` : | height or region to get
Returns : | `image`, or a new a GdkImage containing the contents of `drawable`

Since 2.4