public void DrawRectangle(WindowsPen pen, int x, int y, int width, int height)
{
Debug.Assert(pen != null, "pen == null");
HandleRef hdc = new HandleRef(DeviceContext, DeviceContext.Hdc);
if (pen != null)
{
DeviceContext.SelectObject(pen.HPen, GdiObjectType.Pen);
}
Gdi32.R2 rasterOp = DeviceContext.BinaryRasterOperation;
if (rasterOp != Gdi32.R2.COPYPEN)
{
rasterOp = DeviceContext.SetRasterOperation(Gdi32.R2.COPYPEN);
}
Gdi32.SelectObject(hdc, Gdi32.GetStockObject(Gdi32.StockObject.HOLLOW_BRUSH));
// Add 1 to width and height to create the 'bounding box' (convert from point to size).
IntUnsafeNativeMethods.Rectangle(hdc, x, y, x + width, y + height);
if (rasterOp != Gdi32.R2.COPYPEN)
{
DeviceContext.SetRasterOperation(rasterOp);
}
}
public RectangleValidator(
RECT bounds,
Color penColor,
Color brushColor,
int penWidth = 1,
Gdi32.PS penStyle = default,
Gdi32.R2 rop2 = Gdi32.R2.COPYPEN,
Gdi32.BKMODE backgroundMode = Gdi32.BKMODE.TRANSPARENT,
Gdi32.BS brushStyle = default,
Flags validate = default)
{
_bounds = bounds;
_brushColor = brushColor;
_brushStyle = brushStyle;
_penWidth = penWidth;
_penColor = penColor;
_penStyle = penStyle;
_rop2 = rop2;
_backgroundMode = backgroundMode;
if (validate != default)
{
_validate = validate;
return;
}
// Default values for all of these are valid expectations so we always turn them on.
_validate = Flags.Bounds | Flags.PenStyle | Flags.BrushStyle;
if (penWidth != 0)
{
_validate |= Flags.PenWidth;
}
if (!penColor.IsEmpty)
{
_validate |= Flags.PenColor;
}
if (!brushColor.IsEmpty)
{
_validate |= Flags.BrushColor;
}
if (backgroundMode != default)
{
_validate |= Flags.BackgroundMode;
}
if (_rop2 != default)
{
_validate |= Flags.RopMode;
}
}
public LineToValidator(
Point from,
Point to,
Color penColor,
int penWidth = 1,
Gdi32.PS penStyle = default,
Gdi32.R2 rop2 = Gdi32.R2.COPYPEN,
Gdi32.BKMODE backgroundMode = Gdi32.BKMODE.TRANSPARENT,
Flags validate = default)
{
_from = from;
_to = to;
_penWidth = penWidth;
_penColor = penColor;
_penStyle = penStyle;
_rop2 = rop2;
_backgroundMode = backgroundMode;
if (validate != default)
{
_validate = validate;
return;
}
// Default values for all of these are valid expectations so we always turn them on.
_validate = Flags.From | Flags.To | Flags.PenStyle;
if (penWidth != 0)
{
_validate |= Flags.PenWidth;
}
if (!penColor.IsEmpty)
{
_validate |= Flags.PenColor;
}
if (backgroundMode != default)
{
_validate |= Flags.BackgroundMode;
}
if (_rop2 != default)
{
_validate |= Flags.RopMode;
}
}
internal static IEmfValidator LineTo(
EasyPoint from,
EasyPoint to,
Color penColor,
int penWidth = 1,
Gdi32.PS penStyle = default,
Gdi32.R2 rop2Mode = Gdi32.R2.COPYPEN,
Gdi32.BKMODE backgroundMode = Gdi32.BKMODE.TRANSPARENT,
LineToValidator.Flags validate = default) => new LineToValidator(
from,
to,
penColor,
penWidth,
penStyle,
rop2Mode,
backgroundMode,
validate);
internal static IEmfValidator Rectangle(
RECT bounds,
Color penColor,
Color brushColor,
int penWidth = 1,
Gdi32.PS penStyle = default,
Gdi32.R2 rop2 = Gdi32.R2.COPYPEN,
Gdi32.BKMODE backgroundMode = Gdi32.BKMODE.TRANSPARENT,
Gdi32.BS brushStyle = default,
RectangleValidator.Flags validate = default) => new RectangleValidator(
bounds,
penColor,
brushColor,
penWidth,
penStyle,
rop2,
backgroundMode,
brushStyle,
validate);
public unsafe void DrawLine(WindowsPen pen, int x1, int y1, int x2, int y2)
{
HandleRef hdc = new HandleRef(DeviceContext, DeviceContext.Hdc);
Gdi32.R2 rasterOp = DeviceContext.BinaryRasterOperation;
Gdi32.BKMODE bckMode = DeviceContext.BackgroundMode;
if (rasterOp != Gdi32.R2.COPYPEN)
{
rasterOp = DeviceContext.SetRasterOperation(Gdi32.R2.COPYPEN);
}
if (bckMode != Gdi32.BKMODE.TRANSPARENT)
{
bckMode = DeviceContext.SetBackgroundMode(Gdi32.BKMODE.TRANSPARENT);
}
if (pen != null)
{
DeviceContext.SelectObject(pen.HPen, GdiObjectType.Pen);
}
Point oldPoint = new Point();
IntUnsafeNativeMethods.MoveToEx(hdc, x1, y1, &oldPoint);
IntUnsafeNativeMethods.LineTo(hdc, x2, y2);
if (bckMode != Gdi32.BKMODE.TRANSPARENT)
{
DeviceContext.SetBackgroundMode(bckMode);
}
if (rasterOp != Gdi32.R2.COPYPEN)
{
DeviceContext.SetRasterOperation(rasterOp);
}
IntUnsafeNativeMethods.MoveToEx(hdc, oldPoint.X, oldPoint.Y, &oldPoint);
}
public static Gdi32.R2 SetROP2(IHandle hdc, R2 rop2)
{
Gdi32.R2 result = SetROP2(hdc.Handle, rop2);
GC.KeepAlive(hdc);
return(result);
}
public Rop2Validator(Gdi32.R2 rop2Mode) => _rop2Mode = rop2Mode;
internal static IStateValidator Rop2(Gdi32.R2 rop2Mode) => new Rop2Validator(rop2Mode);
