using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace StgSharp.Graphics
{
    /// <summary>
    /// windows系统API类
    /// </summary>
   public partial class winapi
    {
        /// <summary>
        /// The ChoosePixelFormat function attempts to match an appropriate pixel format supported by a device context to a given pixel format specification.
        /// </summary>
        /// <param name="hdc">
        /// Specifies the device context that the function examines to determine the best match for the pixel format descriptor pointed to by ppfd.
        /// </param>
        /// <param name="ppfd">
        /// Pointer to a PIXELFORMATDESCRIPTOR structure that specifies the requested pixel format.
        /// </param>
        /// <returns>
        /// <para>If the function succeeds, the return value is a pixel format index (one-based) that is the closest match to the given pixel format descriptor.</para>
        /// <para>If the function fails, the return value is zero.</para>
        /// </returns>
        [DllImport("gdi32.dll", ExactSpelling = false, EntryPoint = "ChoosePixelFormat", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern int ChoosePixelFormat(IntPtr hdc, IntPtr ppfd);

        /// <summary>
        /// The SetPixelFormat function sets the pixel format of the specified device context to the format specified by the iPixelFormat index.
        /// </summary>
        /// <param name="hdc">
        /// Specifies the device context whose pixel format the function attempts to set.</param>
        /// <param name="format">
        /// <para>Index that identifies the pixel format to set. </para>
        /// <para>The various pixel formats supported by a device context are identified by one-based indexes.</para>
        /// </param>
        /// <param name="ppfd">
        /// <para>Pointer to a PIXELFORMATDESCRIPTOR structure that contains the logical pixel format specification.</para>
        /// <para>The system's metafile component uses this structure to record the logical pixel format specification.</para>
        /// </param>
        /// <returns>
        /// If the function succeeds, the return value is TRUE.If the function fails, the return value is FALSE.
        /// </returns>
        [DllImport("gdi32.dll", ExactSpelling = false, EntryPoint = "SetPixelFormat", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern bool SetPixelFormat(IntPtr hdc, int format, IntPtr ppfd);

        /// <summary>
        /// <para>The GetDC function retrieves a handle to a device context (DC) for the client area of a specified window or for the entire screen.</para>
        /// <para>You can use the returned handle in subsequent GDI functions to draw in the DC.</para>
        /// </summary>
        /// <param name="hwnd">
        /// A handle to the window whose DC is to be retrieved. If this value is NULL, GetDC retrieves the DC for the entire screen.
        /// </param>
        /// <returns>
        /// <para>If the function succeeds, the return value is a handle to the DC for the specified window's client area.</para>
        /// <para>If the function fails, the return value is NULL.</para>
        /// </returns>
        [DllImport("user32.dll", ExactSpelling = false, EntryPoint = "GetDC", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern IntPtr GetDC(IntPtr hwnd);

        /// <summary>
        /// The SwapBuffers function exchanges the front and back buffers if the current pixel format for the window referenced by the specified device context includes a back buffer.
        /// </summary>
        /// <param name="hdc">
        /// <para>Specifies a device context.</para>
        /// <para> If the current pixel format for the window referenced by this device context includes a back buffer,</para>
        /// <para>the function exchanges the front and back buffers.</para>
        /// </param>
        /// <returns>
        /// If the function succeeds, the return value is TRUE.If the function fails, the return value is FALSE. 
        /// </returns>
        [DllImport("gdi32.dll", ExactSpelling = false, EntryPoint = "SwapBuffers", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern bool SwapBuffers(IntPtr hdc);
        /// <summary>
        /// 获取当前线程的控制台窗口句柄
        /// </summary>
        /// <returns>当前线程控制台句柄</returns>
        [DllImport("kernel32.dll", ExactSpelling = false, EntryPoint = "GetConsoleWindow", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern IntPtr GetConsoleWindow();
    }
}