UNKNOWN '************************************** 'Windows API/Global Declarations for :Mo ' saic '************************************** 'Functions for Processing Bitmaps Declare Function VarPtrArray Lib "msvbvm50.dll" Alias "VarPtr" (Ptr() As Any) As Long Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (pDst As Any, pSrc As Any, ByVal ByteLen As Long) Declare Function GetObjectAPI Lib "gdi32" Alias "GetObjectA" (ByVal hObject As Long, ByVal nCount As Long, lpObject As Any) As Long Type BITMAP bmType As Long bmWidth As Long bmHeight As Long bmWidthBytes As Long bmPlanes As Integer bmBitsPixel As Integer bmBits As Long End Type Type SafeArrayBound cElements As Long lLbound As Long End Type Type SafeArray2D cDims As Integer fFeatures As Integer cbElements As Long cLocks As Long pvData As Long bounds(0 To 1) As SafeArrayBound End Type '************************************** ' Name: Mosaic ' Description:Takes a picturebox, and it ' 's contents, and runs an animated mosaic ' transition through it ' By: Dave Hng ' ' ' Inputs:pctMosaic, the picturebox objec ' t that you're wanting to manipulate MosaicMode, set it to 1 for mosaic, 2 for demosaic, 3 for mosaic, then demosaic ' ' Returns:None ' 'Assumes:Nothing. If you want to edit it ' , that's another story :) ' 'Side Effects:Can crash some computers. ' Seems to be a display driver to windows ' problem! I don't know what causes this! 'This code is copyrighted and has limite ' d warranties. 'Please see http://www.Planet-Source-Cod ' e.com/xq/ASP/txtCodeId.883/lngWId.1/qx/v ' b/scripts/ShowCode.htm 'for details. '************************************** Sub GenMosaic(pctMosaic As Variant, MosaicMode As Integer) 'Mosaic Mode is 1 for Mosaic, 2 for DeMo ' saic 'Declare all objects '======================================= ' =============================== 'This code is (C) StarFox / Dave Hng '98 ' ' 'Posted on http://www.planet-source-code ' .com during May '98. ' 'If you distribute this code, make sure ' that the complete listing is intact, wit ' h these 'comments! If you use it in a program, d ' on't worry about this introduction. ' 'Email: StarFox@earthcorp.com or psychob ' @inf.net.au 'UIN: 866854 ' 'Please credit me if you use this code! ' As far as i know, this is the only nice( ' ish) VB 'image manip sub that i've seen! This is ' one major code hack! :) ' 'Takes a picturebox, and runs a animated ' mosaic transition though it! ' 'Uses Safearrays, CopyMemory, Bitmap bas ' ics. Not for the faint hearted. ' 'pctMosaic is a picturebox object that y ' ou want to run the transition through 'MosaicMode is an integer, indicating wh ' at steps of the mosaic you want to run t ' hough. '1 is mosaic up, 2 is mosaic down, 3 is ' mosaic up, then down again. Experiment! ' ' 'Not very efficient, but the code runs a ' t about 2x to 10x emulated speed when co ' mpiled to 'native code! It runs really really fast ' compiled under the native code compiler! ' 'It's capable of animating a small bitma ' p on a 486dx2/80, with the interval set ' to 1, and 'no re-redraws. ' 'Only works on 256 colour, single plane ' bitmaps. I'll write one for truecolour i ' mages when 'i figure out how the RGBQuad type works ' , (Can anyone help?) and i've finished h ' igh school. ' 'You can change the for.. next statement ' s with the K and L variables to change t ' he speed of 'the function. K is the mosaic depth, L ' is the number of times to call the funct ' ion (limits 'speed, so you can see it better) ' 'Thanks to the guys that wrote the VBPJ ' article on direct access to memory. With ' out that info 'or ideas, i wouldnt've been able to wri ' te the sub. ' 'This code is used in StarLaunch, my mul ' ti emulator launcher: 'http://starlaunch.home.ml.org 'As a transition for screen size preview ' s for snes emulators. ' 'Note: It does crash some computers, for ' no known reason. 'I think it's as video card -> video dri ' ver problem. 'Don't break while this sub is running, ' unless you really have to. If you want t ' o stop 'execution, you must call the cleanup co ' de associated with what the sub's doing. ' '(Copymemory the pointer to 0& again) ' 'Have fun! ' '"If you think it's not possible, make i ' t!" ' '-StarFox Static mosaicgoing As Boolean 'Keep a static variable to check if the ' sub's running. If it is, EXIT! Otherwise ' , GPF! If mosaicgoing = True Then Exit Sub mosaicgoing = True 'Init variables Dim pict() As Byte Dim SA As SafeArray2D, bmp As BITMAP Dim r As Integer, c As Integer, Value As Byte, i As Integer, colour As Integer, j As Integer, k As Integer, L As Integer Dim pCenter As Integer, pC As Integer, pR As Integer Dim rRangei As Integer, rRangej As Integer, ti As Integer, ti2 As Integer Dim uC As Integer, uR As Integer Dim PictureArray() As Byte Dim mRange As Integer Dim cLimit As Integer, rLimit As Integer 'Copy to the array '======================================= ' =============================== GetObjectAPI pctMosaic.Picture, Len(bmp), bmp If bmp.bmPlanes <> 1 Or bmp.bmBitsPixel <> 8 Then MsgBox "Non-256 colour bitmap detected. No mosaic effects" Exit Sub End If 'Init the SafeArray With SA .cbElements = 1 .cDims = 2 .bounds(0).lLbound = 0 .bounds(0).cElements = bmp.bmHeight .bounds(1).lLbound = 0 .bounds(1).cElements = bmp.bmWidthBytes .pvData = bmp.bmBits End With 'Map the pointer over CopyMemory ByVal VarPtrArray(pict), VarPtr(SA), 4 'Make a temporary array to hold the bitm ' ap data. ReDim PictureArray(UBound(pict, 1), UBound(pict, 2)) 'Copy the bitmap into this array. I coul ' d use copymemory again, but this is fast ' enough, 'and a lot safer :) For c = 0 To UBound(pict, 1) For r = 0 To UBound(pict, 2) PictureArray(c, r) = pict(c, r) Next r Next c 'Clean up CopyMemory ByVal VarPtrArray(pict), 0&, 4 '======================================= ' =============================== Select Case MosaicMode Case 1 'Mosaic For k = 1 To 16 Step 1 For L = 1 To 1 'Cube roots used, because the squaring effect looks nicer. Also, due to the 'Nature of my code, it hides irregular the pixel expansion mRange = k ^ 1.5 GoSub Mosaic Next L Next k Case 2 'DeMosaic For k = 16 To 0 Step -(1) For L = 1 To 1 mRange = k ^ 1.5 GoSub Mosaic Next L Next k Case 3 'Mosaic, then DeMosaic For k = 1 To 8 Step 1 mRange = k ^ 1.5 GoSub Mosaic Next k For k = (8) To 0 Step -(1) mRange = k ^ 1.5 GoSub Mosaic Next k End Select mosaicgoing = False Exit Sub 'Actual Mosaic Code '======================================= ' =============================== Mosaic: 'Get the bitmap info again, in case some ' thing's changed GetObjectAPI pctMosaic.Picture, Len(bmp), bmp 'Reinit the SA With SA .cbElements = 1 .cDims = 2 .bounds(0).lLbound = 0 .bounds(0).cElements = bmp.bmHeight .bounds(1).lLbound = 0 .bounds(1).cElements = bmp.bmWidthBytes .pvData = bmp.bmBits End With ''Fake' the pointer CopyMemory ByVal VarPtrArray(pict), VarPtr(SA), 4 'Work out the distance between the squar ' e division grid, and the pixel to get da ' ta from. pCenter = (mRange) \ 2 'Find the limits of the image uC = UBound(pict, 1) uR = UBound(pict, 2) For c = 0 To UBound(pict, 1) Step (mRange + 1) For r = 0 To UBound(pict, 2) Step (mRange + 1) 'Work out the distance between the square division grid, and the pixel to get data from. pCenter = (mRange) \ 2 'Pixel size to copy over rRangei = (mRange) rRangej = (mRange) 'Check if it's running out of bound, in ' case you turned the compiler option off. ' If c + mRange > UBound(pict, 1) Then rRangei = UBound(pict, 1) - c If r + mRange > UBound(pict, 2) Then rRangej = UBound(pict, 2) - r 'Work out where to get the data from pC = c + pCenter pR = r + pCenter If pC > UBound(pict, 1) Then pC = c If pR > UBound(pict, 2) Then pR = r 'Get the palette entry Value = PictureArray(pC, pR) If c = 0 Then cLimit = -pCenter If r = 0 Then rLimit = -pCenter 'Copy the palette entry number over the ' region's pixels For i = cLimit To (rRangei) For j = rLimit To (rRangej) If c + i < 0 Or r + j < 0 Then GoTo SkipPixel pict(c + i, r + j) = Value SkipPixel: Next j Next i SkipThis: Next r Next c EndThis: 'Clean up CopyMemory ByVal VarPtrArray(pict), 0&, 4 'Refresh, so the user sees the change. D ' on't replace with a DoEvents! 'Refreshing is slower, but it's less dan ' gerous! pctMosaic.Refresh '======================================= ' =============================== Return End Sub