#include "l_bitmap.h"
L_LTDIS_API L_INT L_ClearPlaybackUpdateRect(hPlayback)
Clears the update rectangle used for an animation playback, leaving an empty rectangle.
Handle that references the animation playback.
Value | Meaning |
---|---|
SUCCESS | The function was successful. |
< 1 | An error occurred. Refer to Return Codes. |
Regions are not supported on the Windows CE platform.
Required DLLs and Libraries
Win32, x64, Linux.
This example uses L_ClearPlaybackUpdateRect to avoid painting odd numbered bitmaps.
L_INT ClearPlaybackUpdateRectExample(L_HWND hWnd,pBITMAPHANDLE pTargetBitmap, HBITMAPLIST hList)
{
L_INT nRet;
HPALETTE hpalPaint = NULL; /* Paint palette handle */
HPLAYBACK hPlayback; /* Animation playback */
L_UINT uState; /* Next state in the playback */
RECT rcUpdate; /* Source clipping rectangle used in playback */
RECT rcDisplay; /* Display rectangle used in playback */
HDC hdc; /* Device context of the current window */
HPALETTE hPalette = NULL; /* Temporary copy of the current system palette */
L_UINT uIndex = 0; /* Current index to the bitmap list */
/* Use the client area as the display rectangle */
GetClientRect(hWnd,&rcDisplay);
/* Create and run the playback */
nRet = L_CreatePlayback(&hPlayback, pTargetBitmap, hList);
if(nRet != SUCCESS)
return nRet;
do
{
nRet = L_ProcessPlayback(hPlayback, &uState);
if(nRet != SUCCESS)
return nRet;
switch(uState)
{
case PLAYSTATE_POSTRENDER:
nRet = L_GetPlaybackIndex(hPlayback, (L_INT*)&uIndex);
if(nRet != SUCCESS)
return nRet;
if(uIndex % 2)
{
nRet = L_ClearPlaybackUpdateRect(hPlayback);
if(nRet != SUCCESS)
return nRet;
}
nRet = L_GetPlaybackUpdateRect(hPlayback, &rcUpdate, TRUE);
if(nRet != SUCCESS)
return nRet;
hdc = GetDC(hWnd);
if (hpalPaint)
{
hPalette = SelectPalette (hdc, hpalPaint, TRUE);
RealizePalette(hdc);
}
nRet = L_PaintDC(hdc, pTargetBitmap, NULL, &rcUpdate, &rcDisplay, &rcDisplay, SRCCOPY);
if(nRet != SUCCESS)
return nRet;
if (hpalPaint)
SelectPalette (hdc, hPalette, TRUE);
ReleaseDC(hWnd, hdc);
break;
}
} while(uState != PLAYSTATE_END);
/* Clean up */
nRet = L_DestroyPlayback(hPlayback, NULL);
if(nRet != SUCCESS)
return nRet;
return SUCCESS;
}
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