Gets the list index of the current bitmap during animation playback.
#include "ltwrappr.h"
virtual L_INT LPlayBack::GetIndex()
The index of the current bitmap.
Win32, x64.
This example uses LPlayBack::GetIndex and LPlayBack::SetIndex to skip
bitmaps during a playback.
L_INT LPlayBack__GetIndexExample(HWND hWnd, L_TCHAR *pszFileName)
{
L_INT nRet;
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 */
L_UINT uIndex = 0; /* Current index to the bitmap list */
L_UINT uCount = 0; /* Number of bitmaps in the list */
LBitmapBase TargetBitmap;
LBitmapList BitmapList;
LPlayBack PlayBack ; /* Animation playback */
/* Create the bitmap list from the input file (GIF or AVI) */
nRet = BitmapList.Load (pszFileName);
if(nRet != SUCCESS)
return nRet;
/* Set the background bitmap*/
nRet = TargetBitmap.Load(MAKE_IMAGE_PATH(TEXT("image1.cmp")));
if(nRet != SUCCESS)
return nRet;
/* Use the client area as the display rectangle */
GetClientRect(hWnd,&rcDisplay);
/* Get the number of bitmaps in the list */
uCount = BitmapList.GetItemsCount();
/* Create and run the playback */
nRet = PlayBack.Create(&TargetBitmap, &BitmapList);
if(nRet != SUCCESS)
return nRet;
do
{
uState = PlayBack.Process();
switch(uState)
{
case PLAYSTATE_PRERENDER:
uIndex = PlayBack.GetIndex();
nRet = PlayBack.SetIndex( ++uIndex);
if(nRet != SUCCESS)
return nRet;
break;
case PLAYSTATE_POSTRENDER:
nRet = PlayBack.GetUpdateRect(&rcUpdate, TRUE);
if(nRet != SUCCESS)
return nRet;
hdc = GetDC(hWnd);
nRet = PlayBack.GetBitmap()->SetClipSrcRect(&rcUpdate);
if(nRet != SUCCESS)
return nRet;
nRet = PlayBack.GetBitmap()->SetDstRect(&rcDisplay);
if(nRet != SUCCESS)
return nRet;
nRet = PlayBack.GetBitmap()->SetClipDstRect(&rcDisplay);
if(nRet != SUCCESS)
return nRet;
PlayBack.GetBitmap()->Paint()->SetDC(hdc);
PlayBack.GetBitmap()->CreatePaintPalette (hdc);
nRet = PlayBack.GetBitmap()->Paint()->PaintDC();
if(nRet != SUCCESS)
return nRet;
ReleaseDC(hWnd, hdc);
break;
}
} while(uIndex < uCount);
return SUCCESS;
}
Help Collections
Raster .NET | C API | C++ Class Library | HTML5 JavaScript
Document .NET | C API | C++ Class Library | HTML5 JavaScript
Medical .NET | C API | C++ Class Library | HTML5 JavaScript
Medical Web Viewer .NET
Multimedia
Direct Show .NET | C API | Filters
Media Foundation .NET | C API | Transforms
Supported Platforms
.NET, Java, Android, and iOS/macOS Assemblies
Imaging, Medical, and Document
C API/C++ Class Libraries
Imaging, Medical, and Document
HTML5 JavaScript Libraries
Imaging, Medical, and Document
Your email has been sent to support! Someone should be in touch! If your matter is urgent please come back into chat.
Chat Hours:
Monday - Friday, 8:30am to 6pm ET
Thank you for your feedback!
Please fill out the form again to start a new chat.
All agents are currently offline.
Chat Hours:
Monday - Friday
8:30AM - 6PM EST
To contact us please fill out this form and we will contact you via email.