private void PrepareDefaultStringFormat()
{
if (defaultStringFormat == IntPtr.Zero)
{
GdiPlusAPI.CheckStatus(GdiPlusAPI.GdipStringFormatGetGenericDefault(out defaultStringFormat));
}
}
private void PrepareGraphics()
{
if (graphics == IntPtr.Zero)
{
GdiPlusAPI.CheckStatus(GdiPlusAPI.GdipCreateFromHDC(hdc, out graphics));
}
}
public void Dispose()
{
if (graphics != IntPtr.Zero)
{
GdiPlusAPI.CheckStatus(GdiPlusAPI.GdipDeleteGraphics(graphics));
graphics = IntPtr.Zero;
}
if (defaultStringFormat != IntPtr.Zero)
{
GdiPlusAPI.CheckStatus(GdiPlusAPI.GdipDeleteStringFormat(defaultStringFormat));
graphics = IntPtr.Zero;
}
if (originalPen != IntPtr.Zero)
{
Gdi32API.SelectObjectChecked(hdc, originalPen);
}
if (originalBrush != IntPtr.Zero)
{
Gdi32API.SelectObjectChecked(hdc, originalBrush);
}
if (originalFont != IntPtr.Zero)
{
Gdi32API.SelectObjectChecked(hdc, originalFont);
}
}
private void DrawStringGDIPlus(Color color, FontConfig font, int x, int y, string text)
{
PrepareGraphics();
PrepareDefaultStringFormat();
GdiPlusAPI.CheckStatus(GdiPlusAPI.GdipCreateFontFamilyFromName(font.FontFamily, IntPtr.Zero, out var fontFamilyPtr));
try
{
FontStyle fontStyle = GdiPlusAPI.GetFontStyle(font);
GdiPlusAPI.CheckStatus(GdiPlusAPI.GdipCreateFont(fontFamilyPtr, font.Size, fontStyle, Unit.UnitPixel, out var fontPtr));
try
{
GdiPlusAPI.CheckStatus(GdiPlusAPI.GdipCreateSolidFill(color.ToArgb(), out var brush));
try
{
RectF rect = new RectF(x, y, 0, 0);
GdiPlusAPI.GdipDrawString(graphics, text, text.Length, fontPtr, ref rect, defaultStringFormat, brush);
}
finally
{
GdiPlusAPI.CheckStatus(GdiPlusAPI.GdipDeleteBrush(brush));
}
}
finally
{
GdiPlusAPI.CheckStatus(GdiPlusAPI.GdipDeleteFont(fontPtr));
}
}
finally
{
GdiPlusAPI.CheckStatus(GdiPlusAPI.GdipDeleteFontFamily(fontFamilyPtr));
}
}
private void FillRectangleGDIPlus(Color color, int x, int y, int width, int height)
{
PrepareGraphics();
GdiPlusAPI.CheckStatus(GdiPlusAPI.GdipCreateSolidFill(color.ToArgb(), out var brush));
try
{
GdiPlusAPI.CheckStatus(GdiPlusAPI.GdipFillRectangleI(graphics, brush, x, y, width, height));
}
finally
{
GdiPlusAPI.CheckStatus(GdiPlusAPI.GdipDeleteBrush(brush));
}
}