public void Dispose()
{
foreach (IntPtr font in fonts)
{
LibXft.XftFontClose(display, font);
}
}
private IntPtr GetFontByCodePointNonCached(int codePoint)
{
foreach (IntPtr font in fonts)
{
if (LibXft.XftCharExists(display, font, (uint)codePoint) != 0)
{
return(font);
}
}
if (fonts.Count >= MaxFontsCount)
{
return(MainFont);
}
IntPtr fontPtr = LibXft.XftFontOpenName(display, screen, GetXftFontConfig(fontConfig, codePoint));
if (fontPtr == IntPtr.Zero)
{
return(MainFont);
}
if (LibXft.XftCharExists(display, fontPtr, (uint)codePoint) == 0)
{
LibXft.XftFontClose(display, fontPtr);
return(MainFont);
}
fonts.Add(fontPtr);
return(fontPtr);
}
public Size MeasureString(FontConfig font, string text)
{
XftFontExt fontExt = objectCache.GetXftFont(font);
byte[] utf32Text = Encoding.UTF32.GetBytes(text);
int width = 0;
GCHandle utf32TextHandle = GCHandle.Alloc(utf32Text, GCHandleType.Pinned);
try
{
IntPtr utf32TextPtr = utf32TextHandle.AddrOfPinnedObject();
foreach (var range in fontExt.GetRanges(utf32Text))
{
LibXft.XftTextExtents32(
display,
range.Font,
utf32TextPtr + range.Start,
(range.End - range.Start) / 4,
out var extents
);
width += extents.xOff;
}
}
finally
{
utf32TextHandle.Free();
}
var fontInfo = Marshal.PtrToStructure <XftFont>(fontExt.MainFont);
return(new Size(width, fontInfo.height));
}
private int DrawStringRange(
IntPtr xftDraw,
IntPtr xftColorPtr,
IntPtr font,
int x,
int y,
IntPtr utf32TextPtr,
int rangeStart,
int rangeEnd
)
{
LibXft.XftTextExtents32(
display,
font,
utf32TextPtr + rangeStart,
(rangeEnd - rangeStart) / 4,
out var extents
);
LibXft.XftDrawString32(
xftDraw,
xftColorPtr,
font,
x,
y,
utf32TextPtr + rangeStart,
(rangeEnd - rangeStart) / 4
);
return(extents.xOff);
}
public void DrawString(Color color, FontConfig font, int x, int y, string text)
{
x -= origin.X;
y -= origin.Y;
var xftColorPtr = Marshal.AllocHGlobal(Marshal.SizeOf <XftColor>());
try
{
XRenderColor xColor = new XRenderColor(color);
LibXft.XftColorAllocValue(
display,
visual,
colormap,
ref xColor,
xftColorPtr
);
try
{
XftFontExt fontExt = objectCache.GetXftFont(font);
var fontInfo = Marshal.PtrToStructure <XftFont>(fontExt.MainFont);
int xOffset = DrawString(xftDraw, xftColorPtr, fontExt, x, y + fontInfo.ascent, text);
if (font.IsUnderline)
{
int lineHeight = Convert.ToInt32(Math.Max(font.Size / 10, 1));
LibXRender.XRenderFillRectangle(
display, PictOp.PictOpOver, pictureId, ref xColor,
x,
y + fontInfo.ascent + (fontInfo.descent - lineHeight) / 2,
(uint)xOffset,
(uint)lineHeight
);
}
if (font.IsStrikeout)
{
int lineHeight = Convert.ToInt32(Math.Max(font.Size / 20, 1));
LibXRender.XRenderFillRectangle
(
display, PictOp.PictOpOver, pictureId, ref xColor,
x,
y + fontInfo.ascent - (2 * fontInfo.ascent + 3 * lineHeight) / 6,
(uint)xOffset,
(uint)lineHeight
);
}
}
finally
{
LibXft.XftColorFree(display, visual, colormap, xftColorPtr);
}
}
finally
{
Marshal.FreeHGlobal(xftColorPtr);
}
}
public void SetClipRectangle(int x, int y, int width, int height)
{
x -= origin.X;
y -= origin.Y;
clipRectangles = new[] { new XRectangle(x, y, width, height) };
LibXRender.XRenderSetPictureClipRectangles(display, pictureId, 0, 0, clipRectangles, 1);
LibXft.XftDrawSetClipRectangles(xftDraw, 0, 0, clipRectangles, 1);
}
public static X11Canvas CreateForDrawable(
IntPtr display,
int screenNum,
X11ObjectCache objectCache,
IntPtr visual,
ulong colormap,
IntPtr pictFormatPtr,
ulong drawableId
)
{
const XRenderPictureAttributeMask attrMask =
XRenderPictureAttributeMask.CPPolyEdge |
XRenderPictureAttributeMask.CPPolyMode;
XRenderPictureAttributes attr = new XRenderPictureAttributes
{
poly_edge = XRenderPolyEdge.Smooth,
poly_mode = XRenderPolyMode.Imprecise
};
ulong pictureId = LibXRender.XRenderCreatePicture
(
display,
drawableId,
pictFormatPtr,
attrMask,
ref attr
);
IntPtr xftDraw = IntPtr.Zero;
X11Canvas canvas = null;
try
{
xftDraw = LibXft.XftDrawCreate(display, drawableId, visual, colormap);
canvas = new X11Canvas(display, screenNum, objectCache, visual, colormap, pictFormatPtr, drawableId, pictureId, xftDraw);
xftDraw = IntPtr.Zero;
}
finally
{
if (canvas == null)
{
if (xftDraw != IntPtr.Zero)
{
LibXft.XftDrawDestroy(xftDraw);
}
LibXRender.XRenderFreePicture(display, pictureId);
}
}
return(canvas);
}
public static XftFontExt Create(FontConfig fontConfig, IntPtr display, int screen)
{
IntPtr fontPtr = LibXft.XftFontOpenName(display, screen, GetXftFontConfig(fontConfig, -1));
return(new XftFontExt(fontConfig, display, screen, fontPtr));
}
public void Dispose()
{
LibXft.XftDrawDestroy(xftDraw);
LibXRender.XRenderFreePicture(display, pictureId);
}
