Función para rellenar un rectángulo en un hdc con parte o el total de otro hdc, la función es muy rápida en dibujar.
Option Explicit
' --------------------------------
' Autor Leandro Ascierto
' --------------------------------
Private Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function CreateCompatibleDC Lib "gdi32" (ByVal hdc As Long) As Long
Private Declare Function CreateCompatibleBitmap Lib "gdi32" (ByVal hdc As Long, ByVal nWidth As Long, ByVal nHeight As Long) As Long
Private Declare Function SelectObject Lib "gdi32" (ByVal hdc As Long, ByVal hObject As Long) As Long
Private Declare Function DeleteDC Lib "gdi32" (ByVal hdc As Long) As Long
Private Declare Function DeleteObject Lib "gdi32.dll" (ByVal hObject As Long) As Long
Private Declare Function CreatePatternBrush Lib "gdi32.dll" (ByVal hBitmap As Long) As Long
Private Declare Function FillRect Lib "user32" (ByVal hdc As Long, lpRect As RECT, ByVal hBrush As Long) As Long
Private Declare Function SetRect Lib "user32" (lpRect As RECT, ByVal X1 As Long, ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long) As Long
Private Declare Function BitBlt Lib "gdi32" (ByVal hDestDC As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As Long
Private Declare Function SetBrushOrgEx Lib "gdi32.dll" (ByVal hdc As Long, ByVal nXOrg As Long, ByVal nYOrg As Long, ByRef lppt As POINTAPI) As Long
Private Declare Function ReleaseDC Lib "user32.dll" (ByVal hwnd As Long, ByVal hdc As Long) As Long
Private Type POINTAPI
x As Long
y As Long
End Type
Private Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type
' Función que rellena un hdc con el contenido de otro en forma repetitiva
Private Sub FillRectEx(DestDC As Long, DestX As Long, DestY As Long, DestWidth As Long, DestHeight As Long, SrcDC As Long, SrcX As Long, SrcY As Long, SrcWidth As Long, SrcHeight As Long)
Dim DC As Long
Dim hDCMemory As Long
Dim hBmp As Long
Dim OldhBmp As Long
Dim hBrush As Long
Dim Rec As RECT
Dim PT As POINTAPI
DC = GetDC(0)
hDCMemory = CreateCompatibleDC(0)
hBmp = CreateCompatibleBitmap(DC, SrcWidth, SrcHeight)
ReleaseDC 0&, DC
OldhBmp = SelectObject(hDCMemory, hBmp)
BitBlt hDCMemory, 0, 0, SrcWidth, SrcHeight, SrcDC, SrcX, SrcY, vbSrcCopy
hBrush = CreatePatternBrush(hBmp)
SetRect Rec, DestX, DestY, DestWidth + DestX, DestHeight + DestY
SetBrushOrgEx hdc, DestX, DestY, PT
FillRect DestDC, Rec, hBrush
SetBrushOrgEx hdc, PT.x, PT.y, PT
DeleteObject hBrush
DeleteObject SelectObject(hDCMemory, OldhBmp)
DeleteDC hDCMemory
End Sub
Private Sub Form_Load()
With Picture1
.Visible = False
.AutoSize = True
.ScaleMode = vbPixels
.AutoRedraw = True
.Picture = Me.Icon
End With
End Sub
Private Sub Form_Paint()
FillRectEx Me.hdc, 0, 0, Me.ScaleWidth, Me.ScaleHeight, Picture1.hdc, 0, 0, Picture1.ScaleWidth, Picture1.ScaleHeight
End Sub
