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197 lines
5.8 KiB
Plaintext
197 lines
5.8 KiB
Plaintext
<!-- ##### SECTION Title ##### -->
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Bitmaps and Pixmaps
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<!-- ##### SECTION Short_Description ##### -->
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Offscreen drawables.
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<!-- ##### SECTION Long_Description ##### -->
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<para>
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Pixmaps are offscreen drawables. They can be drawn upon with the
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standard drawing primitives, then copied to another drawable (such as
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a #GdkWindow) with gdk_pixmap_draw(). The depth of a pixmap
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is the number of bits per pixels. Bitmaps are simply pixmaps
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with a depth of 1. (That is, they are monochrome bitmaps - each
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pixel can be either on or off).
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</para>
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<!-- ##### SECTION See_Also ##### -->
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<para>
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</para>
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<!-- ##### STRUCT GdkPixmap ##### -->
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<para>
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An opaque structure representing an offscreen drawable.
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Pointers to structures of type #GdkPixmap, #GdkBitmap,
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and #GdkWindow, can often be used interchangeably.
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The type #GdkDrawable refers generically to any of
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these types.
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</para>
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@user_data:
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<!-- ##### FUNCTION gdk_pixmap_new ##### -->
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<para>
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Create a new pixmap with a given size and depth.
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</para>
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@window: a #GdkWindow, used to determine default values for the
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new pixmap. Can be %NULL if @depth is specified,
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@width: The width of the new pixmap in pixels.
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@height: The height of the new pixmap in pixels.
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@depth: The depth (number of bits per pixel) of the new pixmap.
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If -1, and @window is not %NULL, the depth of the new
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pixmap will be equal to that of @window.
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@Returns: the #GdkPixmap
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<!-- ##### FUNCTION gdk_bitmap_create_from_data ##### -->
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<para>
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Creates a new bitmap from data in XBM format.
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</para>
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@window: a #GdkWindow, used to determine default values for the
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new pixmap. Can be %NULL, in which case the root window is
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used.
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@data: a pointer to the XBM data.
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@width: the width of the new pixmap in pixels.
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@height: the height of the new pixmap in pixels.
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@Returns: the #GdkBitmap
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<!-- ##### FUNCTION gdk_pixmap_create_from_data ##### -->
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<para>
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Create a two-color pixmap from data in XBM data.
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</para>
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@window: a #GdkWindow, used to determine default values for the
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new pixmap. Can be %NULL, if the depth is given.
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@data: a pointer to the data.
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@width: the width of the new pixmap in pixels.
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@height: the height of the new pixmap in pixels.
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@depth: the depth (number of bits per pixel) of the new pixmap.
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@fg: the foreground color.
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@bg: the background color.
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@Returns: the #GdkPixmap
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<!-- ##### FUNCTION gdk_pixmap_create_from_xpm ##### -->
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<para>
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Create a pixmap from a XPM file.
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</para>
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@window: a #GdkWindow, used to determine default values for the
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new pixmap.
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@mask: a pointer to a place to store a bitmap representing
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the transparency mask of the XPM file. Can be %NULL,
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in which case transparency will be ignored.
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@transparent_color: the color to be used for the pixels
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that are transparent in the input file. Can be %NULL,
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in which case a default color will be used.
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@filename: the filename of a file containing XPM data.
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@Returns: the #GdkPixmap
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<!-- ##### FUNCTION gdk_pixmap_colormap_create_from_xpm ##### -->
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<para>
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Create a pixmap from a XPM file using a particular colormap.
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</para>
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@window: a #GdkWindow, used to determine default values for the
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new pixmap. Can be %NULL if @colormap is given.
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@colormap: the #GdkColormap that the new pixmap will be use.
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If omitted, the colormap for @window will be used.
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@mask: a pointer to a place to store a bitmap representing
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the transparency mask of the XPM file. Can be %NULL,
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in which case transparency will be ignored.
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@transparent_color: the color to be used for the pixels
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that are transparent in the input file. Can be %NULL,
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in which case a default color will be used.
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@filename: the filename of a file containing XPM data.
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@Returns: the #GdkPixmap.
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<!-- ##### FUNCTION gdk_pixmap_create_from_xpm_d ##### -->
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<para>
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Create a pixmap from data in XPM format.
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</para>
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@window: a #GdkWindow, used to determine default values for the
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new pixmap.
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@mask: Pointer to a place to store a bitmap representing
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the transparency mask of the XPM file. Can be %NULL,
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in which case transparency will be ignored.
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@transparent_color: This color will be used for the pixels
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that are transparent in the input file. Can be %NULL
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in which case a default color will be used.
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@data: Pointer to a string containing the XPM data.
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@Returns: the #GdkPixmap
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<!-- ##### FUNCTION gdk_pixmap_colormap_create_from_xpm_d ##### -->
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<para>
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Create a pixmap from data in XPM format using a particular
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colormap.
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</para>
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@window: a #GdkWindow, used to determine default values for the
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new pixmap. Can be %NULL if @colormap is given.
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@colormap: the #GdkColormap that the new pixmap will be use.
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If omitted, the colormap for @window will be used.
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@mask: a pointer to a place to store a bitmap representing
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the transparency mask of the XPM file. Can be %NULL,
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in which case transparency will be ignored.
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@transparent_color: the color to be used for the pixels
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that are transparent in the input file. Can be %NULL,
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in which case a default color will be used.
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@data: Pointer to a string containing the XPM data.
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@Returns: the #GdkPixmap.
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<!-- ##### MACRO gdk_pixmap_ref ##### -->
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<para>
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Increase the reference count of a pixmap.
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</para>
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@pixmap: a #GdkPixmap
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@Returns: @pixmap
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<!-- ##### MACRO gdk_pixmap_unref ##### -->
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<para>
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Decrease the reference count of a pixmap. If the resulting
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reference count is zero, destroy the pixmap.
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</para>
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@pixmap: a #GdkPixmap
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<!-- ##### STRUCT GdkBitmap ##### -->
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<para>
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An opaque structure representing an offscreen drawable of depth
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1. Pointers to structures of type #GdkPixmap, #GdkBitmap, and
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#GdkWindow, can often be used interchangeably. The type #GdkDrawable
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refers generically to any of these types.
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</para>
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@user_data:
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<!-- ##### MACRO gdk_bitmap_ref ##### -->
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<para>
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Increase the reference count of a bitmap. An alias
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for gdk_pixmap_ref().
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</para>
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@Returns: @pixmap
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@pixmap: a #GdkBitmap
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<!-- ##### MACRO gdk_bitmap_unref ##### -->
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<para>
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Decrease the reference count of a bitmap. An alias
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for gdk_pixmap_unref().
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</para>
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@pixmap: a #GdkBitmap
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