qetuo088
asked on
Get Pixel in VB
Let say I have a small image, 50 by 10.
How do I use VB to get each individual pixel from my image file, and print each pixel
byte to the screen ?
How do I use VB to get each individual pixel from my image file, and print each pixel
byte to the screen ?
>2. Load a picbox and use GetPoint, SetPoint API (faster)
GetPixel, SetPixel is what that should read.
GetPixel, SetPixel is what that should read.
ASKER
any sample ?
ASKER
I think I will use GetDlBits
ASKER
hes,
that example will not work, becaue what I need is a pixel unit. And I can get a byte
that represents the pixel
that example will not work, becaue what I need is a pixel unit. And I can get a byte
that represents the pixel
Here you go.
Option Explicit
Private Type BITMAPFILEHEADER
bfType As String * 2
bfSize As Long
bfReserved1 As Integer
bfReserved2 As Integer
bfOffBits As Long
End Type
Private Type RGBQUAD
rgbBlue As Byte
rgbGreen As Byte
rgbRed As Byte
rgbReserved As Byte
End Type
Private Type BITMAPINFOHEADER
biSize As Long
biWidth As Long
biHeight As Long
biPlanes As Integer
biBitCount As Integer
biCompression As Long
biSizeImage As Long
biXPelsPerMeter As Long
biYPelsPerMeter As Long
biClrUsed As Long
biClrImportant As Long
End Type
Private Type BITMAP '24 bytes
bmType As Long
bmWidth As Long
bmHeight As Long
bmWidthBytes As Long
bmPlanes As Integer
bmBitsPixel As Integer
bmBits As Long
End Type
Private Type BITMAPINFO
bmiHeader As BITMAPINFOHEADER
bmiColors As Long
End Type
Private Declare Function CreateCompatibleDC Lib "gdi32" (ByVal hdc As Long) As Long
Private Declare Function DeleteDC Lib "gdi32" (ByVal hdc As Long) As Long
Private Declare Function SelectObject Lib "gdi32" (ByVal hdc As Long, ByVal hObject As Long) As Long
Private Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long
Private Declare Function GetObject Lib "gdi32" Alias "GetObjectA" (ByVal hObject As Long, ByVal nCount As Long, lpObject As Any) As Long
Private Declare Function GetDIBits& Lib "gdi32" (ByVal aHDC As Long, ByVal hBitmap As Long, ByVal nStartScan As Long, ByVal nNumScans As Long, lpBits As Any, lpBI As BITMAPINFO, ByVal wUsage As Long)
Private Declare Function GetPixel Lib "gdi32" (ByVal hdc As Long, ByVal X As Long, ByVal Y As Long) As Long
Private Declare Function SetPixel Lib "gdi32" (ByVal hdc As Long, ByVal X As Long, ByVal Y As Long, ByVal crColor As Long) As Long
Private Const DIB_RGB_COLORS& = 0
Private Const BI_RGB = 0&
Private Sub Form_Load()
Dim lngRet As Long
Dim bih As BITMAPINFO
Dim hCmpDC As Long
Dim bmp As BITMAP
Dim lngW As Long, lngH As Long
Dim hBMP As Long, hOld As Long
Dim lngColor() As Long
Dim BytesPerScanLine As Long
Dim PadBytesPerScanLine As Long
Dim pic As StdPicture
Dim i As Long
' Dim BFH As BITMAPFILEHEADER 'Size 14
Set pic = LoadPicture("C:\My Documents\Graphics\BMPs\ts
hBMP = pic.Handle
' Fill out the BITMAP structure.
lngRet = GetObject(hBMP, Len(bmp), bmp)
Debug.Print lngRet
'Create a device context compatible with the Desktop.
hCmpDC = CreateCompatibleDC(0&)
'Select the bitmap handle into the new device context.
hOld = SelectObject(hCmpDC, hBMP)
With bih.bmiHeader
.biSize = 40
.biWidth = bmp.bmWidth
.biHeight = bmp.bmHeight
.biPlanes = 1
.biBitCount = 32
.biCompression = BI_RGB
BytesPerScanLine = ((((.biWidth * .biBitCount) + 31) \ 32) * 4)
PadBytesPerScanLine = BytesPerScanLine - (((.biWidth * .biBitCount) + 7) \ 8)
.biSizeImage = BytesPerScanLine * Abs(.biHeight)
End With
ReDim lngColor(1 To bmp.bmWidth * bmp.bmHeight)
lngRet = GetDIBits(hCmpDC, hBMP, 0, bmp.bmHeight, lngColor(1), bih, DIB_RGB_COLORS)
Debug.Print lngRet
Picture1.ScaleMode = vbPixels
Picture1.Width = bmp.bmWidth * Screen.TwipsPerPixelX
Picture1.Height = bmp.bmHeight * Screen.TwipsPerPixelY
Picture1.AutoRedraw = True
Debug.Print bmp.bmHeight, bmp.bmWidth
'Write pixels one by one
For lngH = bmp.bmHeight - 1 To 0 Step -1
For lngW = 0 To bmp.bmWidth - 1
i = i + 1
SetPixel Picture1.hdc, lngW, lngH, lngColor(i)
Next
Next
'Clean up
SelectObject hCmpDC, hOld
DeleteObject hBMP
DeleteDC hCmpDC
End Sub
Option Explicit
Private Type BITMAPFILEHEADER
bfType As String * 2
bfSize As Long
bfReserved1 As Integer
bfReserved2 As Integer
bfOffBits As Long
End Type
Private Type RGBQUAD
rgbBlue As Byte
rgbGreen As Byte
rgbRed As Byte
rgbReserved As Byte
End Type
Private Type BITMAPINFOHEADER
biSize As Long
biWidth As Long
biHeight As Long
biPlanes As Integer
biBitCount As Integer
biCompression As Long
biSizeImage As Long
biXPelsPerMeter As Long
biYPelsPerMeter As Long
biClrUsed As Long
biClrImportant As Long
End Type
Private Type BITMAP '24 bytes
bmType As Long
bmWidth As Long
bmHeight As Long
bmWidthBytes As Long
bmPlanes As Integer
bmBitsPixel As Integer
bmBits As Long
End Type
Private Type BITMAPINFO
bmiHeader As BITMAPINFOHEADER
bmiColors As Long
End Type
Private Declare Function CreateCompatibleDC Lib "gdi32" (ByVal hdc As Long) As Long
Private Declare Function DeleteDC Lib "gdi32" (ByVal hdc As Long) As Long
Private Declare Function SelectObject Lib "gdi32" (ByVal hdc As Long, ByVal hObject As Long) As Long
Private Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long
Private Declare Function GetObject Lib "gdi32" Alias "GetObjectA" (ByVal hObject As Long, ByVal nCount As Long, lpObject As Any) As Long
Private Declare Function GetDIBits& Lib "gdi32" (ByVal aHDC As Long, ByVal hBitmap As Long, ByVal nStartScan As Long, ByVal nNumScans As Long, lpBits As Any, lpBI As BITMAPINFO, ByVal wUsage As Long)
Private Declare Function GetPixel Lib "gdi32" (ByVal hdc As Long, ByVal X As Long, ByVal Y As Long) As Long
Private Declare Function SetPixel Lib "gdi32" (ByVal hdc As Long, ByVal X As Long, ByVal Y As Long, ByVal crColor As Long) As Long
Private Const DIB_RGB_COLORS& = 0
Private Const BI_RGB = 0&
Private Sub Form_Load()
Dim lngRet As Long
Dim bih As BITMAPINFO
Dim hCmpDC As Long
Dim bmp As BITMAP
Dim lngW As Long, lngH As Long
Dim hBMP As Long, hOld As Long
Dim lngColor() As Long
Dim BytesPerScanLine As Long
Dim PadBytesPerScanLine As Long
Dim pic As StdPicture
Dim i As Long
' Dim BFH As BITMAPFILEHEADER 'Size 14
Set pic = LoadPicture("C:\My Documents\Graphics\BMPs\ts
hBMP = pic.Handle
' Fill out the BITMAP structure.
lngRet = GetObject(hBMP, Len(bmp), bmp)
Debug.Print lngRet
'Create a device context compatible with the Desktop.
hCmpDC = CreateCompatibleDC(0&)
'Select the bitmap handle into the new device context.
hOld = SelectObject(hCmpDC, hBMP)
With bih.bmiHeader
.biSize = 40
.biWidth = bmp.bmWidth
.biHeight = bmp.bmHeight
.biPlanes = 1
.biBitCount = 32
.biCompression = BI_RGB
BytesPerScanLine = ((((.biWidth * .biBitCount) + 31) \ 32) * 4)
PadBytesPerScanLine = BytesPerScanLine - (((.biWidth * .biBitCount) + 7) \ 8)
.biSizeImage = BytesPerScanLine * Abs(.biHeight)
End With
ReDim lngColor(1 To bmp.bmWidth * bmp.bmHeight)
lngRet = GetDIBits(hCmpDC, hBMP, 0, bmp.bmHeight, lngColor(1), bih, DIB_RGB_COLORS)
Debug.Print lngRet
Picture1.ScaleMode = vbPixels
Picture1.Width = bmp.bmWidth * Screen.TwipsPerPixelX
Picture1.Height = bmp.bmHeight * Screen.TwipsPerPixelY
Picture1.AutoRedraw = True
Debug.Print bmp.bmHeight, bmp.bmWidth
'Write pixels one by one
For lngH = bmp.bmHeight - 1 To 0 Step -1
For lngW = 0 To bmp.bmWidth - 1
i = i + 1
SetPixel Picture1.hdc, lngW, lngH, lngColor(i)
Next
Next
'Clean up
SelectObject hCmpDC, hOld
DeleteObject hBMP
DeleteDC hCmpDC
End Sub
ASKER
PaulHews,
You code will make a copy pixel by pixel to picture1, right. But what I want is to print out the byte that represents exach pixel.
For example, here are the first 5 bytes :
23 4e 3f ff 2e
23 maybe mean blue, ff mean black, etc.
You code will make a copy pixel by pixel to picture1, right. But what I want is to print out the byte that represents exach pixel.
For example, here are the first 5 bytes :
23 4e 3f ff 2e
23 maybe mean blue, ff mean black, etc.
That's easy enough. I've shown you how to split the long rgb value into r, g, b components. You can figure out how to do the printing your own way:
Option Explicit
Private Type BITMAPFILEHEADER
bfType As String * 2
bfSize As Long
bfReserved1 As Integer
bfReserved2 As Integer
bfOffBits As Long
End Type
Private Type RGBQUAD
rgbBlue As Byte
rgbGreen As Byte
rgbRed As Byte
rgbReserved As Byte
End Type
Private Type BITMAPINFOHEADER
biSize As Long
biWidth As Long
biHeight As Long
biPlanes As Integer
biBitCount As Integer
biCompression As Long
biSizeImage As Long
biXPelsPerMeter As Long
biYPelsPerMeter As Long
biClrUsed As Long
biClrImportant As Long
End Type
Private Type BITMAP '24 bytes
bmType As Long
bmWidth As Long
bmHeight As Long
bmWidthBytes As Long
bmPlanes As Integer
bmBitsPixel As Integer
bmBits As Long
End Type
Private Type BITMAPINFO
bmiHeader As BITMAPINFOHEADER
bmiColors As Long
End Type
Private Declare Function CreateCompatibleDC Lib "gdi32" (ByVal hdc As Long) As Long
Private Declare Function DeleteDC Lib "gdi32" (ByVal hdc As Long) As Long
Private Declare Function SelectObject Lib "gdi32" (ByVal hdc As Long, ByVal hObject As Long) As Long
Private Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long
Private Declare Function GetObject Lib "gdi32" Alias "GetObjectA" (ByVal hObject As Long, ByVal nCount As Long, lpObject As Any) As Long
Private Declare Function GetDIBits& Lib "gdi32" (ByVal aHDC As Long, ByVal hBitmap As Long, ByVal nStartScan As Long, ByVal nNumScans As Long, lpBits As Any, lpBI As BITMAPINFO, ByVal wUsage As Long)
Private Declare Function GetPixel Lib "gdi32" (ByVal hdc As Long, ByVal X As Long, ByVal Y As Long) As Long
Private Declare Function SetPixel Lib "gdi32" (ByVal hdc As Long, ByVal X As Long, ByVal Y As Long, ByVal crColor As Long) As Long
Private Const DIB_RGB_COLORS& = 0
Private Const BI_RGB = 0&
Private Type Lng
Color As Long
End Type
Private Type Byts
r As Byte
g As Byte
b As Byte
F As Byte
End Type
Private Sub sSplitRGB(lngColour As Long, r As Byte, g As Byte, b As Byte)
Dim ColourLng As Lng
Dim RGBByt As Byts
ColourLng.Color = lngColour
LSet RGBByt = ColourLng
r = RGBByt.r
g = RGBByt.g
b = RGBByt.b
End Sub
Private Sub Form_Load()
Dim lngRet As Long
Dim bih As BITMAPINFO
Dim hCmpDC As Long
Dim bmp As BITMAP
Dim lngW As Long, lngH As Long
Dim hBMP As Long, hOld As Long
Dim lngColor() As Long, r As Byte, g As Byte, b As Byte
Dim BytesPerScanLine As Long
Dim PadBytesPerScanLine As Long
Dim pic As StdPicture
Dim i As Long
' Dim BFH As BITMAPFILEHEADER 'Size 14
Set pic = LoadPicture("C:\My Documents\Graphics\BMPs\ts
hBMP = pic.Handle
' Fill out the BITMAP structure.
lngRet = GetObject(hBMP, Len(bmp), bmp)
Debug.Print lngRet
'Create a device context compatible with the Desktop.
hCmpDC = CreateCompatibleDC(0&)
'Select the bitmap handle into the new device context.
hOld = SelectObject(hCmpDC, hBMP)
With bih.bmiHeader
.biSize = 40
.biWidth = bmp.bmWidth
.biHeight = bmp.bmHeight
.biPlanes = 1
.biBitCount = 32
.biCompression = BI_RGB
BytesPerScanLine = ((((.biWidth * .biBitCount) + 31) \ 32) * 4)
PadBytesPerScanLine = BytesPerScanLine - (((.biWidth * .biBitCount) + 7) \ 8)
.biSizeImage = BytesPerScanLine * Abs(.biHeight)
End With
ReDim lngColor(1 To bmp.bmWidth * bmp.bmHeight)
lngRet = GetDIBits(hCmpDC, hBMP, 0, bmp.bmHeight, lngColor(1), bih, DIB_RGB_COLORS)
Debug.Print lngRet
Picture1.ScaleMode = vbPixels
Picture1.Width = bmp.bmWidth * Screen.TwipsPerPixelX + 300
Picture1.Height = bmp.bmHeight * Screen.TwipsPerPixelY + 300
Picture1.AutoRedraw = True
Debug.Print bmp.bmHeight, bmp.bmWidth
'Write pixels one by one
For lngH = bmp.bmHeight - 1 To 0 Step -1
For lngW = 0 To bmp.bmWidth - 1
i = i + 1
' SetPixel Picture1.hdc, lngW, lngH, lngColor(i)
Call sSplitRGB(lngColor(i), r, g, b)
Debug.Print "Red : " & Hex(r) & " Green : " & Hex(g) & " Blue : " & Hex(b)
Next
Next
'Clean up
SelectObject hCmpDC, hOld
DeleteObject hBMP
DeleteDC hCmpDC
End Sub
Option Explicit
Private Type BITMAPFILEHEADER
bfType As String * 2
bfSize As Long
bfReserved1 As Integer
bfReserved2 As Integer
bfOffBits As Long
End Type
Private Type RGBQUAD
rgbBlue As Byte
rgbGreen As Byte
rgbRed As Byte
rgbReserved As Byte
End Type
Private Type BITMAPINFOHEADER
biSize As Long
biWidth As Long
biHeight As Long
biPlanes As Integer
biBitCount As Integer
biCompression As Long
biSizeImage As Long
biXPelsPerMeter As Long
biYPelsPerMeter As Long
biClrUsed As Long
biClrImportant As Long
End Type
Private Type BITMAP '24 bytes
bmType As Long
bmWidth As Long
bmHeight As Long
bmWidthBytes As Long
bmPlanes As Integer
bmBitsPixel As Integer
bmBits As Long
End Type
Private Type BITMAPINFO
bmiHeader As BITMAPINFOHEADER
bmiColors As Long
End Type
Private Declare Function CreateCompatibleDC Lib "gdi32" (ByVal hdc As Long) As Long
Private Declare Function DeleteDC Lib "gdi32" (ByVal hdc As Long) As Long
Private Declare Function SelectObject Lib "gdi32" (ByVal hdc As Long, ByVal hObject As Long) As Long
Private Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long
Private Declare Function GetObject Lib "gdi32" Alias "GetObjectA" (ByVal hObject As Long, ByVal nCount As Long, lpObject As Any) As Long
Private Declare Function GetDIBits& Lib "gdi32" (ByVal aHDC As Long, ByVal hBitmap As Long, ByVal nStartScan As Long, ByVal nNumScans As Long, lpBits As Any, lpBI As BITMAPINFO, ByVal wUsage As Long)
Private Declare Function GetPixel Lib "gdi32" (ByVal hdc As Long, ByVal X As Long, ByVal Y As Long) As Long
Private Declare Function SetPixel Lib "gdi32" (ByVal hdc As Long, ByVal X As Long, ByVal Y As Long, ByVal crColor As Long) As Long
Private Const DIB_RGB_COLORS& = 0
Private Const BI_RGB = 0&
Private Type Lng
Color As Long
End Type
Private Type Byts
r As Byte
g As Byte
b As Byte
F As Byte
End Type
Private Sub sSplitRGB(lngColour As Long, r As Byte, g As Byte, b As Byte)
Dim ColourLng As Lng
Dim RGBByt As Byts
ColourLng.Color = lngColour
LSet RGBByt = ColourLng
r = RGBByt.r
g = RGBByt.g
b = RGBByt.b
End Sub
Private Sub Form_Load()
Dim lngRet As Long
Dim bih As BITMAPINFO
Dim hCmpDC As Long
Dim bmp As BITMAP
Dim lngW As Long, lngH As Long
Dim hBMP As Long, hOld As Long
Dim lngColor() As Long, r As Byte, g As Byte, b As Byte
Dim BytesPerScanLine As Long
Dim PadBytesPerScanLine As Long
Dim pic As StdPicture
Dim i As Long
' Dim BFH As BITMAPFILEHEADER 'Size 14
Set pic = LoadPicture("C:\My Documents\Graphics\BMPs\ts
hBMP = pic.Handle
' Fill out the BITMAP structure.
lngRet = GetObject(hBMP, Len(bmp), bmp)
Debug.Print lngRet
'Create a device context compatible with the Desktop.
hCmpDC = CreateCompatibleDC(0&)
'Select the bitmap handle into the new device context.
hOld = SelectObject(hCmpDC, hBMP)
With bih.bmiHeader
.biSize = 40
.biWidth = bmp.bmWidth
.biHeight = bmp.bmHeight
.biPlanes = 1
.biBitCount = 32
.biCompression = BI_RGB
BytesPerScanLine = ((((.biWidth * .biBitCount) + 31) \ 32) * 4)
PadBytesPerScanLine = BytesPerScanLine - (((.biWidth * .biBitCount) + 7) \ 8)
.biSizeImage = BytesPerScanLine * Abs(.biHeight)
End With
ReDim lngColor(1 To bmp.bmWidth * bmp.bmHeight)
lngRet = GetDIBits(hCmpDC, hBMP, 0, bmp.bmHeight, lngColor(1), bih, DIB_RGB_COLORS)
Debug.Print lngRet
Picture1.ScaleMode = vbPixels
Picture1.Width = bmp.bmWidth * Screen.TwipsPerPixelX + 300
Picture1.Height = bmp.bmHeight * Screen.TwipsPerPixelY + 300
Picture1.AutoRedraw = True
Debug.Print bmp.bmHeight, bmp.bmWidth
'Write pixels one by one
For lngH = bmp.bmHeight - 1 To 0 Step -1
For lngW = 0 To bmp.bmWidth - 1
i = i + 1
' SetPixel Picture1.hdc, lngW, lngH, lngColor(i)
Call sSplitRGB(lngColor(i), r, g, b)
Debug.Print "Red : " & Hex(r) & " Green : " & Hex(g) & " Blue : " & Hex(b)
Next
Next
'Clean up
SelectObject hCmpDC, hOld
DeleteObject hBMP
DeleteDC hCmpDC
End Sub
ASKER
PaulHews,
Why I always got lngColour = -1 ?
Shouldn't I get something like 17234132 ?
And When you use debug.print..., I only see a lot of
duplicate lines :
Red : ff Green : ff Blue : ff
Why ???
Why I always got lngColour = -1 ?
Shouldn't I get something like 17234132 ?
And When you use debug.print..., I only see a lot of
duplicate lines :
Red : ff Green : ff Blue : ff
Why ???
Did you copy and paste the code? Why don't you send me your test bmp and I'll try it? (email in profile)
It's because your test bitmap is all black and white (mostly white.) White in RGB is -1 (FF FF FF), black is 0 (00 00 00)
When I ran your bitmap, I got sections like this:
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : 0 Green : 0 Blue : 0
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : 0 Green : 0 Blue : 0
Red : 0 Green : 0 Blue : 0
Red : 0 Green : 0 Blue : 0
Red : 0 Green : 0 Blue : 0
Red : 0 Green : 0 Blue : 0
Red : 0 Green : 0 Blue : 0
Red : 0 Green : 0 Blue : 0
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : 0 Green : 0 Blue : 0
Red : 0 Green : 0 Blue : 0
Red : 0 Green : 0 Blue : 0
Red : 0 Green : 0 Blue : 0
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : 0 Green : 0 Blue : 0
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
But mostly FF FF FF (white)
When I ran your bitmap, I got sections like this:
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : 0 Green : 0 Blue : 0
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : 0 Green : 0 Blue : 0
Red : 0 Green : 0 Blue : 0
Red : 0 Green : 0 Blue : 0
Red : 0 Green : 0 Blue : 0
Red : 0 Green : 0 Blue : 0
Red : 0 Green : 0 Blue : 0
Red : 0 Green : 0 Blue : 0
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : 0 Green : 0 Blue : 0
Red : 0 Green : 0 Blue : 0
Red : 0 Green : 0 Blue : 0
Red : 0 Green : 0 Blue : 0
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : 0 Green : 0 Blue : 0
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
But mostly FF FF FF (white)
You will get other values than -1 and 0, but that is because there is an unused byte in the long that can contain garbage values.
whooee
ASKER
PaulHews,
This is what I got :
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
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33 52
I got all white !
This is what I got :
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
Red : FF Green : FF Blue : FF
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33 52
I got all white !
The debug window show more than a few hundred entries (even though over a thousand have been printed.) Try sending it to a file instead. Rewrite the pixel writing routine like this:
'Write pixels one by one
Dim hfile As Integer
hfile = FreeFile
Open "C:\temp\test.txt" For Output As hfile
For lngH = bmp.bmHeight - 1 To 0 Step -1
For lngW = 0 To bmp.bmWidth - 1
i = i + 1
' SetPixel Picture1.hdc, lngW, lngH, lngColor(i)
Call sSplitRGB(lngColor(i), r, g, b)
Print #hfile, "Red : " & Hex(r) & " Green : " & Hex(g) & " Blue : " & Hex(b)
Next
Next
Close #hfile
Better yet, use a bitmap that has lots of different colors.
'Write pixels one by one
Dim hfile As Integer
hfile = FreeFile
Open "C:\temp\test.txt" For Output As hfile
For lngH = bmp.bmHeight - 1 To 0 Step -1
For lngW = 0 To bmp.bmWidth - 1
i = i + 1
' SetPixel Picture1.hdc, lngW, lngH, lngColor(i)
Call sSplitRGB(lngColor(i), r, g, b)
Print #hfile, "Red : " & Hex(r) & " Green : " & Hex(g) & " Blue : " & Hex(b)
Next
Next
Close #hfile
Better yet, use a bitmap that has lots of different colors.
ASKER
I cannot use a lot of color. I am only limited to
Black, grey, lightgrey, white.
Black, grey, lightgrey, white.
Well the file output should work anyway. Why are you doing all this if you don't mind me asking. It seems like an unusual way to treat a bitmap.
ASKER
Let me test it, and I will get back to you !
ASKER
PaulHews,
I copied the code from Form_Load into a Command1_Click.
When I clicked it, picture1 is empty. Why ?
But after pasted the code back to Form_Load, I could see image in picture1.
I copied the code from Form_Load into a Command1_Click.
When I clicked it, picture1 is empty. Why ?
But after pasted the code back to Form_Load, I could see image in picture1.
ASKER CERTIFIED SOLUTION
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1. Load a picbox with picture and use Point and Pset
2. Load a picbox and use GetPoint, SetPoint API (faster)
3. If it is a BMP, you can retrieve the individual pixels with the API GetDIBits.
Let me know which way you want to do it.