Clears the update rectangle used for an animation playback, leaving an empty rectangle.
#include "l_bitmap.h"
L_LTDIS_API L_INT L_ClearPlaybackUpdateRect(hPlayback)
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.
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;
}
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.