Windows/FooEditEngine/D2DTextRender.cs

   1 /*
   2  * Copyright (C) 2013 FooProject
   3  * * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by
   4  * the Free Software Foundation; either version 3 of the License, or (at your option) any later version.
   5
   6  * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
   7  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
   8
   9 You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.
  10  */
  11 using System;
  12 using System.Collections.Generic;
  13 using System.Linq;
  14 using System.Text;
  15 using System.Windows;
  16 using System.Drawing;
  17 using FooEditEngine;
  18 using SharpDX;
  19 using D2D = SharpDX.Direct2D1;
  20 using DW = SharpDX.DirectWrite;
  21 using DXGI = SharpDX.DXGI;
  22 using System.Runtime.InteropServices;
  23
  24 namespace FooEditEngine.Windows
  25 {
  26
  27     sealed class D2DTextRender : D2DRenderCommon, IEditorRender, IDisposable
  28     {
  29         FooTextBox TextBox;
  30         string fontName;
  31         float fontSize;
  32
  33         public D2DTextRender(FooTextBox textbox)
  34         {
  35             this.TextBox = textbox;
  36
  37             textbox.SizeChanged += new EventHandler(textbox_SizeChanged);
  38             textbox.FontChanged += new EventHandler(textbox_FontChanged);
  39
  40             Size size = textbox.Size;
  41             this.fontName = textbox.Font.Name;
  42             this.fontSize = textbox.Font.Size;
  43             this.InitTextFormat(textbox.Font.Name, (float)textbox.Font.Size);
  44         }
  45
  46         public override void GetDpi(out float dpix, out float dpiy)
  47         {
  48             IntPtr hDc = NativeMethods.GetDC(IntPtr.Zero);
  49             dpix = NativeMethods.GetDeviceCaps(hDc, NativeMethods.LOGPIXELSX);
  50             dpiy = NativeMethods.GetDeviceCaps(hDc, NativeMethods.LOGPIXELSY);
  51             NativeMethods.ReleaseDC(IntPtr.Zero, hDc);
  52         }
  53
  54         void textbox_FontChanged(object sender, EventArgs e)
  55         {
  56             FooTextBox textbox = (FooTextBox)sender;
  57             Font font = textbox.Font;
  58             this.fontName = font.Name;
  59             this.fontSize = font.Size;
  60             DW.FontWeight weigth = font.Bold ? DW.FontWeight.Bold : DW.FontWeight.Normal;
  61             DW.FontStyle style = font.Italic ? DW.FontStyle.Italic : DW.FontStyle.Normal;
  62             this.InitTextFormat(font.Name, font.Size,weigth,style);
  63         }
  64
  65         void textbox_SizeChanged(object sender, EventArgs e)
  66         {
  67             FooTextBox textbox = (FooTextBox)sender;
  68             this.ReConstructDeviceResource(this.TextBox.Width, this.TextBox.Height);
  69         }
  70
  71         public override void DrawCachedBitmap(Rectangle rect)
  72         {
  73             if (this.WindowRender == null || this.WindowRender.IsDisposed)
  74                 return;
  75             this.WindowRender.DrawBitmap(this.CachedBitmap, rect, 1.0f, D2D.BitmapInterpolationMode.Linear, rect);
  76         }
  77
  78         public override void CacheContent()
  79         {
  80             if (this.WindowRender == null || this.CachedBitmap == null || this.CachedBitmap.IsDisposed || this.WindowRender.IsDisposed)
  81                 return;
  82             this.WindowRender.Flush();
  83             this.CachedBitmap.CopyFromRenderTarget(this.WindowRender, new SharpDX.Point(), new SharpDX.Rectangle(0, 0, (int)this.renderSize.Width, (int)this.renderSize.Height));
  84             this.hasCache = true;
  85         }
  86
  87         public static Color4 ToColor4(System.Drawing.Color color)
  88         {
  89             return new Color4(color.R / 255.0f, color.G / 255.0f, color.B / 255.0f, color.A / 255.0f);
  90         }
  91
  92
  93         public void DrawOneLine(LineToIndexTable lti, int row, double x, double y, IEnumerable<Selection> SelectRanges)
  94         {
  95             this.DrawOneLine(lti,
  96                 row,
  97                 x,
  98                 y,
  99                 SelectRanges,
 100                 null);
 101         }
 102
 103         D2D.WindowRenderTarget WindowRender;
 104
 105         protected override D2D.RenderTarget ConstructRender(D2D.Factory factory, D2D.RenderTargetProperties prop, double width, double height)
 106         {
 107             D2D.HwndRenderTargetProperties hwndProp = new D2D.HwndRenderTargetProperties();
 108             hwndProp.Hwnd = this.TextBox.Handle;
 109             hwndProp.PixelSize = new SharpDX.Size2(this.TextBox.Size.Width,this.TextBox.Size.Height);
 110             hwndProp.PresentOptions = D2D.PresentOptions.Immediately;
 111             this.WindowRender = new D2D.WindowRenderTarget(factory,prop,hwndProp);
 112             return this.WindowRender;
 113         }
 114
 115         protected override void ConstrctedResource()
 116         {
 117             this.Foreground = ToColor4(this.TextBox.Foreground);
 118             this.Background = ToColor4(this.TextBox.Background);
 119             this.ControlChar = ToColor4(this.TextBox.ControlChar);
 120             this.Url = ToColor4(this.TextBox.Url);
 121             this.Keyword1 = ToColor4(this.TextBox.Keyword1);
 122             this.Keyword2 = ToColor4(this.TextBox.Keyword2);
 123             this.Literal = ToColor4(this.TextBox.Literal);
 124             this.Comment = ToColor4(this.TextBox.Comment);
 125             this.Hilight = ToColor4(this.TextBox.Hilight);
 126             this.LineMarker = ToColor4(this.TextBox.LineMarker);
 127             this.InsertCaret = ToColor4(this.TextBox.InsertCaret);
 128             this.OverwriteCaret = ToColor4(this.TextBox.OverwriteCaret);
 129             this.UpdateArea = ToColor4(this.TextBox.UpdateArea);
 130         }
 131
 132         protected override void DestructRender()
 133         {
 134             if (this.WindowRender != null)
 135                 this.WindowRender.Dispose();
 136         }
 137     }
 138
 139     internal static class NativeMethods
 140     {
 141         public const int LOGPIXELSX = 88;
 142         public const int LOGPIXELSY = 90;
 143
 144         [DllImport("gdi32.dll")]
 145         public static extern int GetDeviceCaps(IntPtr hDc, int nIndex);
 146
 147         [DllImport("user32.dll")]
 148         public static extern IntPtr GetDC(IntPtr hWnd);
 149
 150         [DllImport("user32.dll")]
 151         public static extern int ReleaseDC(IntPtr hWnd, IntPtr hDc);
 152     }
 153 }