#include "l_bitmap.h"
L_LTKRN_API L_INT L_CreateBitmapList(phList)
Creates an empty list of LEAD bitmaps. The list can then be built and maintained with related functions.
Address of the HBITMAPLIST variable for the new list.
Value | Meaning |
---|---|
SUCCESS | The function was successful. |
< 1 | An error occurred. Refer to Return Codes. |
Required DLLs and Libraries
Win32, x64, Linux.
This example creates a bitmap list from the current bitmap, rotating each copy by 10 degrees. It defines the rotation fill color as a transparent color, and assigns an animation background color. It then plays the animation, using the current bitmap as the target.
L_INT CreateBitmapListExample(HWND hWnd,
HPALETTE hpalPaint,/* Paint palette handle. */
pBITMAPHANDLE pBitmap) /* Bitmap handle for the loaded image. */
{
L_INT nRet;
HBITMAPLIST hList; /* Bitmap list */
BITMAPHANDLE TmpBitmap; /* Temporary bitmap for building the list */
L_INT nMax = 160; /* Maximum width or height for bitmaps in the list */
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 */
RGBQUAD TmpPalette[1]; /* Palette to define the transparent color */
L_INT i; /* Loop counter */
/* Reduce memory requirements, if necessary. Only small bitmaps play smoothly. */
if (pBitmap->Width > nMax)
{
nRet = L_SizeBitmap (pBitmap, nMax, (pBitmap->Height * nMax) / pBitmap->Width, SIZE_RESAMPLE);
if(nRet !=SUCCESS)
return nRet;
}
else if (pBitmap->Height > nMax)
{
nRet = L_SizeBitmap (pBitmap, (pBitmap->Width * nMax) / pBitmap->Height, nMax, SIZE_RESAMPLE);
if(nRet !=SUCCESS)
return nRet;
}
/* Dither to an optimized palette, leaving the last color blank to use
later for transparency */
nRet = L_ColorResBitmap(pBitmap, pBitmap, sizeof(BITMAPHANDLE), 8, CRF_FLOYDSTEINDITHERING|CRF_OPTIMIZEDPALETTE|CRF_IDENTITYPALETTE,
NULL, NULL, 255, NULL, NULL);
if(nRet !=SUCCESS)
return nRet;
/* Set the transparent color in the last position of the palette */
TmpPalette[0].rgbBlue = (BYTE) 202;
TmpPalette[0].rgbGreen = (BYTE) 222;
TmpPalette[0].rgbRed = (BYTE) 212;
nRet = L_PutBitmapColors(pBitmap, 50, 1, TmpPalette);
if(nRet !=SUCCESS)
return nRet;
/* Create the paint palette */
hdc = GetDC (hWnd);
hpalPaint = L_CreatePaintPalette (hdc, pBitmap);
ReleaseDC (hWnd, hdc);
/* Set the playback flags that will apply to all bitmaps in the list */
pBitmap->Flags.WaitUserInput = FALSE;
pBitmap->Flags.Transparency = TRUE;
pBitmap->Left = 0;
pBitmap->Top = 0;
pBitmap->Delay = 10;
pBitmap->Transparency = PALETTEINDEX(255); /* Last color in the palette */
pBitmap->DisposalMethod = PLAYDISPOSE_RESTOREBACKGROUND;
/* Create and populate the bitmap list */
nRet = L_CreateBitmapList(&hList);
if(nRet !=SUCCESS)
return nRet;
for (i = 0; i <= 36; ++ i)
{
nRet = L_CopyBitmap(&TmpBitmap, pBitmap, sizeof(BITMAPHANDLE));
if(nRet !=SUCCESS)
return nRet;
/* Rotate, using the transparent color as the fill color */
nRet = L_RotateBitmap (&TmpBitmap, 1000 * i, 0, PALETTEINDEX(255));
if(nRet !=SUCCESS)
return nRet;
nRet = L_InsertBitmapListItem(hList, (L_UINT)-1, &TmpBitmap);
if(nRet !=SUCCESS)
return nRet;
}
/* Set the background color for the animation playback */
pBitmap->Background = RGB(0,0,255);
/* Use the client area as the display rectangle */
GetClientRect(hWnd,&rcDisplay);
/* Create and run the playback */
nRet = L_CreatePlayback(&hPlayback, pBitmap, hList);
if(nRet !=SUCCESS)
return nRet;
do
{
nRet = L_ProcessPlayback(hPlayback, &uState);
if(nRet !=SUCCESS)
return nRet;
switch(uState)
{
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, pBitmap, 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;
nRet = L_DestroyBitmapList(hList);
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.