Gets the list index of the current bitmap during animation playback.
#include "l_bitmap.h"
L_LTDIS_API L_INT L_GetPlaybackIndex(hPlayback, pnIndex)
Handle that references the animation playback.
Address of the variable to be updated with the index of the current bitmap.
Value | Meaning |
---|---|
SUCCESS | The function was successful. |
< 1 | An error occurred. Refer to Return Codes. |
Win32, x64, Linux.
This example uses L_GetPlaybackIndex and L_SetPlaybackIndex to skip bitmaps during a playback.
L_INT GetPlaybackIndexExample(L_HWND hWnd, pBITMAPHANDLE pTargetBitmap, HBITMAPLIST hList)
{
L_INT nRet;
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_INT nIndex = 0; /* Current index to the bitmap list */
L_UINT uCount = 0; /* Number of bitmaps in the list */
HPALETTE hpalPaint = NULL;
/* Use the client area as the display rectangle */
GetClientRect(hWnd, &rcDisplay);
/* Get the number of bitmaps in the list */
nRet = L_GetBitmapListCount(hList, &uCount);
if (nRet != SUCCESS)
return nRet;
/* 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_PRERENDER:
nRet = L_GetPlaybackIndex(hPlayback, &nIndex);
if (nRet != SUCCESS)
return nRet;
nRet = L_SetPlaybackIndex(hPlayback, ++nIndex);
if (nRet != SUCCESS)
return nRet;
break;
case PLAYSTATE_POSTRENDER:
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 (nIndex < (L_INT)uCount);
/* Clean up */
nRet = L_DestroyPlayback(hPlayback, NULL);
return nRet;
}
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