L_GetPlaybackIndex

#include "l_bitmap.h"

L_LTDIS_API L_INT L_GetPlaybackIndex(hPlayback, pnIndex)

HPLAYBACK hPlayback;	playback handle
L_INT *pnIndex;	address of the variable to be updated

Gets the list index of the current bitmap during animation playback.

Parameter	Description
hPlayback	Handle that references the animation playback.
pnIndex	Address of the variable to be updated with the index of the current bitmap.

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.

Platforms

Win32, x64, Linux.

Example

This example uses L_GetPlaybackIndex and L_SetPlaybackIndex to skip bitmaps during a playback.

pBITMAPHANDLE HBITMAPLIST {      L_UINT    RECT    RECT    HDC     L_INT    L_UINT    HPALETTE                                                  }

codeContainer Generic">L_INT GetPlaybackIndexExample(L_HWND             hWnd,  pTargetBitmap,  hList)   L_INT nRet;  HPLAYBACK   hPlayback;       /* Animation playback */  uState;          /* Next state in the playback */  rcUpdate;        /* Source clipping rectangle used in playback */  rcDisplay;       /* Display rectangle used in playback */  hdc;             /* Device context of the current window */  HPALETTE    hPalette = NULL; /* Temporary copy of the current system palette */  nIndex = 0;      /* Current index to the bitmap list */  uCount = 0;      /* Number of bitmaps in the list */  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);  if(nRet != SUCCESS)  return nRet;  return SUCCESS;

Help Version 19.0.2017.10.27

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LEADTOOLS Raster Imaging C API Help

Introduction

Version History

Getting Started

LEADTOOLS Raster Imaging Features

Redistributables/Files To Be Included With Your Application

Functions:	L_CreatePlayback, L_DestroyPlayback, L_GetPlaybackDelay, L_CancelPlaybackWait, L_ProcessPlayback, L_ClearPlaybackUpdateRect, L_GetPlaybackState, L_GetPlaybackUpdateRect, L_SetPlaybackIndex, L_AppendPlayback, L_ValidatePlaybackLines
Topics:	Raster Image Functions: Creating and Maintaining Lists of Images
	Implementing Animation