285 lines
No EOL
11 KiB
XML
285 lines
No EOL
11 KiB
XML
<Type Name="Visual" FullName="Gdk.Visual">
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<TypeSignature Language="C#" Value="public class Visual : GLib.Object, IWrapper, IDisposable" Maintainer="miguel" />
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<AssemblyInfo>
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<AssemblyName>gdk-sharp</AssemblyName>
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<AssemblyVersion>0.0.0.0</AssemblyVersion>
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<Attributes />
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</AssemblyInfo>
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<ThreadSafetyStatement>Not thread safe</ThreadSafetyStatement>
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<Docs>
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<summary>Describes a particular video hardware display format.</summary>
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<remarks>
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<para>
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A Gdk.Visual describes a particular video hardware display
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format. It includes information about the number of bits used
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for each color, the way the bits are translated into an RGB
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value for display, and the way the bits are stored in
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memory. For example, a piece of display hardware might support
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24-bit color, 16-bit color, or 8-bit color; meaning
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24/16/8-bit pixel sizes. For a given pixel size, pixels can be
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in different formats; for example the "red" element of an RGB
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pixel may be in the top 8 bits of the pixel, or may be in the
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lower 4 bits.
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</para>
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<para>
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Usually you can avoid thinking about visuals in GTK+. Visuals
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are useful to interpret the contents of a <see
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cref="T:Gdk.Image"/>, but you should avoid GdkImage precisely
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because its contents depend on the display hardware; use <see
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cref="T:Gdk.Pixbuf"/> instead, for all but the most low-level
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purposes. Also, anytime you provide a <see
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cref="T:Gdk.Colormap"/>, the visual is implied as part of the
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colormap (<see cref="P:Gdk.Colormap.Visual"/>), so you won't
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have to provide a visual in addition.
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</para>
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<para>
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There are several standard visuals. The visual returned by
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<see cref="P:Gdk.Visual.System"/> is the system's default
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visual. <see cref="P:Gdk.Rgb.Visual"/> return the visual most
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suited to displaying full-color image data. If you use the
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calls in <see cref="T:Gdk.RGB"/>, you should create your
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windows using this visual (and the colormap returned by <see
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cref="P:Gdk.Rgb.Colormap"/>).
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</para>
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<para>
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A number of functions are provided for determining the "best"
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available visual. For the purposes of making this
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determination, higher bit depths are considered better, and
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for visuals of the same bit depth, <see
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cref="E:Gdk.VisualType.PseudoColor"/> is preferred at 8bpp,
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otherwise, the visual types are ranked in the order of
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(highest to lowest) <see cref="E:Gdk.VisualType.DirectColor"/>
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<see cref="E:Gdk.VisualType.TrueColor"/>, <see
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cref="E:Gdk.VisualType.PseudoColor"/>, <see
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cref="Gdk.VisualType.StaticColor"/>, <see
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cref="Gdk.VisualType.Grayscale"/>, then
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<see cref="E:Gdk.VisualType.StaticGray"/>.
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</para>
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</remarks>
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</Docs>
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<Base>
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<BaseTypeName>GLib.Object</BaseTypeName>
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</Base>
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<Interfaces>
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<Interface>
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<InterfaceName>GLib.IWrapper</InterfaceName>
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</Interface>
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<Interface>
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<InterfaceName>System.IDisposable</InterfaceName>
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</Interface>
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</Interfaces>
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<Attributes />
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<Members>
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<Member MemberName="GetBestWithDepth">
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<MemberSignature Language="C#" Value="public static Gdk.Visual GetBestWithDepth (int depth);" />
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<MemberType>Method</MemberType>
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<ReturnValue>
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<ReturnType>Gdk.Visual</ReturnType>
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</ReturnValue>
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<Parameters>
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<Parameter Name="depth" Type="System.Int32" />
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</Parameters>
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<Docs>
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<summary>Get the best visual with depth depth for the default GDK screen.</summary>
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<param name="depth">A bit depth</param>
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<returns>Best visual for the given depth.</returns>
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<remarks>
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<para>
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Get the best visual with depth depth for the default GDK
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screen. Color visuals and visuals with mutable colormaps
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are preferred over grayscale or fixed-colormap visuals.
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The return value should not be freed. <see
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langword="null"/> may be returned if no visual supports
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<paramref name="depth"/>.
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</para>
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</remarks>
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</Docs>
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</Member>
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<Member MemberName="TypeGetType">
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<MemberSignature Language="C#" Value="public static uint TypeGetType ();" />
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<MemberType>Method</MemberType>
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<ReturnValue>
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<ReturnType>System.UInt32</ReturnType>
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</ReturnValue>
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<Parameters />
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<Docs>
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<summary>To be added</summary>
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<returns>To be added: an object of type 'uint'</returns>
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<remarks>To be added</remarks>
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</Docs>
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</Member>
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<Member MemberName="GetBestWithType">
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<MemberSignature Language="C#" Value="public static Gdk.Visual GetBestWithType (Gdk.VisualType visual_type);" />
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<MemberType>Method</MemberType>
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<ReturnValue>
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<ReturnType>Gdk.Visual</ReturnType>
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</ReturnValue>
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<Parameters>
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<Parameter Name="visual_type" Type="Gdk.VisualType" />
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</Parameters>
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<Docs>
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<summary>Get the best visual of the given visual_type for the default GDK screen.</summary>
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<param name="visual_type">Required visual type.</param>
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<returns>Best visual of the given type</returns>
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<remarks>
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<para>
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Get the best visual of the given <paramref
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name="visual_type"/> for the default GDK screen. Visuals
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with higher color depths are considered better. The return
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value should not be freed. <see langword="null"/> may be
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returned if no visual has type <paramref
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name="visual_type"/>.
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</para>
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</remarks>
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</Docs>
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</Member>
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<Member MemberName="GetBestWithBoth">
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<MemberSignature Language="C#" Value="public static Gdk.Visual GetBestWithBoth (int depth, Gdk.VisualType visual_type);" />
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<MemberType>Method</MemberType>
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<ReturnValue>
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<ReturnType>Gdk.Visual</ReturnType>
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</ReturnValue>
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<Parameters>
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<Parameter Name="depth" Type="System.Int32" />
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<Parameter Name="visual_type" Type="Gdk.VisualType" />
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</Parameters>
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<Docs>
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<summary>Get the best visual given a visual type and a
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required depth.</summary>
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<param name="depth">Required depth.</param>
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<param name="visual_type">Required visual type.</param>
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<returns>Best visual of the given type and depth.</returns>
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<remarks>
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<para>
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Get the best visual of the given <paramref
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name="visual_type"/> at the given <paramref
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name="depth"/>for the default GDK screen. Visuals with
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higher color depths are considered better. The return
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value should not be freed. <see langword="null"/> may be
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returned if no visual that match the type <paramref
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name="visual_type"/> and <paramref name="depth"/>.
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</para>
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</remarks>
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</Docs>
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</Member>
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<Member MemberName="Finalize">
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<MemberSignature Language="C#" Value="protected virtual void Finalize ();" />
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<MemberType>Method</MemberType>
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<ReturnValue>
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<ReturnType>System.Void</ReturnType>
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</ReturnValue>
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<Parameters />
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<Docs>
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<summary>To be added</summary>
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<remarks>To be added</remarks>
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</Docs>
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</Member>
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<Member MemberName=".ctor">
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<MemberSignature Language="C#" Value="protected Visual (uint gtype);" />
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<MemberType>Constructor</MemberType>
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<ReturnValue />
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<Parameters>
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<Parameter Name="gtype" Type="System.UInt32" />
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</Parameters>
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<Docs>
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<summary>Internal constructor</summary>
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<param name="gtype">GLib type.</param>
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<returns>A constructed Visual from a type</returns>
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<remarks>For internal use only.</remarks>
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</Docs>
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</Member>
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<Member MemberName=".ctor">
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<MemberSignature Language="C#" Value="public Visual (IntPtr raw);" />
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<MemberType>Constructor</MemberType>
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<ReturnValue />
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<Parameters>
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<Parameter Name="raw" Type="System.IntPtr" />
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</Parameters>
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<Docs>
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<summary>To be added</summary>
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<param name="raw">To be added: an object of type 'IntPtr'</param>
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<returns>To be added: an object of type 'Gdk.Visual'</returns>
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<remarks>To be added</remarks>
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</Docs>
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</Member>
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<Member MemberName=".ctor">
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<MemberSignature Language="C#" Value="protected Visual ();" />
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<MemberType>Constructor</MemberType>
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<ReturnValue />
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<Parameters />
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<Docs>
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<summary>To be added</summary>
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<returns>To be added: an object of type 'Gdk.Visual'</returns>
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<remarks>To be added</remarks>
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</Docs>
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</Member>
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<Member MemberName="GType">
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<MemberSignature Language="C#" Value="public static uint GType { get; };" />
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<MemberType>Property</MemberType>
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<ReturnValue>
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<ReturnType>System.UInt32</ReturnType>
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</ReturnValue>
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<Docs>
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<summary>To be added</summary>
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<returns>To be added: an object of type 'uint'</returns>
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<remarks>To be added</remarks>
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</Docs>
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</Member>
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<Member MemberName="BestType">
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<MemberSignature Language="C#" Value="public static Gdk.VisualType BestType { get; };" />
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<MemberType>Property</MemberType>
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<ReturnValue>
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<ReturnType>Gdk.VisualType</ReturnType>
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</ReturnValue>
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<Docs>
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<summary>Best visual type for the default Gdk screen</summary>
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<returns>The best visual type available.</returns>
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<remarks>Return the best available visual type for the default GDK screen.</remarks>
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</Docs>
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</Member>
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<Member MemberName="BestDepth">
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<MemberSignature Language="C#" Value="public static int BestDepth { get; };" />
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<MemberType>Property</MemberType>
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<ReturnValue>
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<ReturnType>System.Int32</ReturnType>
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</ReturnValue>
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<Docs>
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<summary>Best depth for the default Gdk screen.</summary>
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<returns>The best depth</returns>
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<remarks>
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<para>
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Get the best available depth for the default GDK
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screen. "Best" means "largest," i.e. 32 preferred over 24
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preferred over 8 bits per pixel.
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</para>
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</remarks>
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</Docs>
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</Member>
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<Member MemberName="Best">
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<MemberSignature Language="C#" Value="public static Gdk.Visual Best { get; };" />
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<MemberType>Property</MemberType>
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<ReturnValue>
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<ReturnType>Gdk.Visual</ReturnType>
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</ReturnValue>
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<Docs>
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<summary>Visual with the most available colors for the default GDK screen.</summary>
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<returns>The best visual.</returns>
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<remarks>Get the visual with the most available colors for the default GDK screen. </remarks>
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</Docs>
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</Member>
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<Member MemberName="System">
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<MemberSignature Language="C#" Value="public static Gdk.Visual System { get; };" />
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<MemberType>Property</MemberType>
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<ReturnValue>
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<ReturnType>Gdk.Visual</ReturnType>
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</ReturnValue>
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<Docs>
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<summary>The system'sdefault visual for the default GDK
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screen.</summary> <returns>The system visual</returns>
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<remarks>Get the system'sdefault visual for the default GDK
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screen. This is the visual for the root window of the
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display.</remarks>
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</Docs>
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</Member>
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</Members>
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</Type> |