Available in LEADTOOLS Imaging Pro, Vector, Document, and Medical Imaging toolkits. |
#include "ltwrappr.h"
virtual L_INT LPlayBack::ClearUpdateRect()
Clears the update rectangle used for the class object's animation playback, leaving an empty rectangle.
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Required DLLs and Libraries
LTDIS For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
Win32, x64.
See Also
Functions: |
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Topics: |
Raster Image Functions: Creating and Maintaining Lists of Images |
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Example
This example uses ClearUpdateRect to avoid painting odd numbered bitmaps.
#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName L_INT LPlayBack__ClearUpdateRectExample(HWND hWnd) { L_INT nRet; // this will call the default constructor LBitmap LeadBitmap; LPlayBack PlayBack; HDC hDC; HPALETTE hPalette; L_UINT uState, uIndex; RECT rcClientRect, rcUpdate; L_INT nCounter = 0; GetClientRect(hWnd, &rcClientRect); nRet = LeadBitmap.Create (500, 500,8); if(nRet != SUCCESS) return nRet; nRet = PlayBack.Create (&LeadBitmap); if(nRet != SUCCESS) return nRet; nRet = LeadBitmap.Load (MAKE_IMAGE_PATH(TEXT("image1.cmp")), 8); if(nRet != SUCCESS) return nRet; nRet = PlayBack.Append(&LeadBitmap); if(nRet != SUCCESS) return nRet; nRet = LeadBitmap.Load (MAKE_IMAGE_PATH(TEXT("image2.cmp")), 8); if(nRet != SUCCESS) return nRet; nRet = PlayBack.Append(&LeadBitmap); if(nRet != SUCCESS) return nRet; nRet = LeadBitmap.Load (MAKE_IMAGE_PATH(TEXT("ImageProcessingDemo\\Image3.cmp")), 8); if(nRet != SUCCESS) return nRet; hDC = GetDC(hWnd); hPalette = LeadBitmap.CreatePaintPalette (hDC); hPalette = LeadBitmap.DupPalette(); SelectPalette( hDC, hPalette, TRUE ); RealizePalette(hDC); nRet = PlayBack.Append(&LeadBitmap); if(nRet != SUCCESS) return nRet; uState = PlayBack.GetState(); while(uState != PLAYSTATE_END) { uState = PlayBack.Process(); switch(uState) { case PLAYSTATE_WAITINPUT: nRet = PlayBack.CancelWait(); if(nRet != SUCCESS) return nRet; break; case PLAYSTATE_POSTCLEAR: case PLAYSTATE_POSTRENDER: uIndex = PlayBack.GetIndex (); if(uIndex % 2) { nRet = PlayBack.ClearUpdateRect (); if(nRet != SUCCESS) return nRet; } nRet = PlayBack.GetUpdateRect(&rcUpdate, TRUE); if(nRet != SUCCESS) return nRet; nRet = PlayBack.GetBitmap()->SetClipSrcRect(&rcUpdate); if(nRet != SUCCESS) return nRet; nRet = PlayBack.GetBitmap()->SetDstRect(&rcClientRect); if(nRet != SUCCESS) return nRet; nRet = PlayBack.GetBitmap()->SetClipDstRect(&rcClientRect); if(nRet != SUCCESS) return nRet; PlayBack.GetBitmap()->Paint()->SetDC(hDC); PlayBack.GetBitmap()->CreatePaintPalette (hDC); nRet = PlayBack.GetBitmap()->Paint()->PaintDC(); if(nRet != SUCCESS) return nRet; break; } nCounter = PlayBack.GetIndex(); } ReleaseDC(hWnd, hDC); return SUCCESS; }