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using System;
using System.IO;
using Drawing2D;
using Glfw;
namespace Crow.CairoBackend
{
public class ImageBackend : CairoBackendBase {
/// <summary>
/// Create a new generic backend bound to the application surface
/// </summary>
/// <param name="width">backend surface width</param>
/// <param name="height">backend surface height</param>
public ImageBackend (ref IntPtr nativeWindoPointer, out bool ownGlfwWinHandle, int width, int height) : base () {
if (nativeWindoPointer == IntPtr.Zero) {
Glfw3.Init ();
Glfw3.WindowHint (WindowAttribute.ClientApi, 0);
Glfw3.WindowHint (WindowAttribute.Resizable, 1);
Glfw3.WindowHint (WindowAttribute.Decorated, 1);
hWin = Glfw3.CreateWindow (width, height, "win name", MonitorHandle.Zero, IntPtr.Zero);
if (hWin == IntPtr.Zero)
throw new Exception ("[GLFW3] Unable to create Window");
nativeWindoPointer = hWin;
ownGlfwWinHandle = true;
} else {
hWin = nativeWindoPointer;
ownGlfwWinHandle = false;
}
switch (Environment.OSVersion.Platform) {
case PlatformID.Unix:
IntPtr disp = Glfw3.GetX11Display ();
IntPtr nativeWin = Glfw3.GetX11Window (nativeWindoPointer);
Int32 scr = Glfw3.GetX11DefaultScreen (disp);
IntPtr visual = Glfw3.GetX11DefaultVisual (disp, scr);
surf = new XlibSurface (disp, nativeWin, visual, width, height);
break;
case PlatformID.Win32NT:
case PlatformID.Win32S:
case PlatformID.Win32Windows:
IntPtr hWin32 = Glfw3.GetWin32Window (nativeWindoPointer);
IntPtr hdc = Glfw3.GetWin32DC (hWin32);
surf = new Win32Surface (hdc);
break;
default:
throw new PlatformNotSupportedException ("Unable to create cairo image backend.");
}
}
/// <summary>
/// Create a new offscreen backend, used in perfTests
/// </summary>
/// <param name="width">backend surface width</param>
/// <param name="height">backend surface height</param>
public ImageBackend (int width, int height) : base () {
surf = new ImageSurface (Format.ARGB32, width, height);
}
public override ISurface CreateSurface(int width, int height)
=> new ImageSurface (Format.ARGB32, width, height);
public override ISurface CreateSurface(byte[] data, int width, int height)
=> new ImageSurface (data, Format.ARGB32, width, height, 4 * width);
public override IContext PrepareUIFrame(IContext existingContext, IRegion clipping)
{
IContext ctx = base.PrepareUIFrame (existingContext, clipping);
clear (ctx);
ctx.PushGroup ();
return ctx;
}
public override void FlushUIFrame(IContext ctx)
{
ctx.PopGroupToSource ();
ctx.Paint ();
base.FlushUIFrame (ctx);
}
}
}
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