SaveBitmapToPNGFile
int SaveBitmapToPNGFile (int bitmapID, char filename[]);
Purpose
Saves a bitmap image to a .png file. The .png file format is the only format in which you can save alpha-channel transparency data. You also can save any mask you have applied to the bitmap. The file will retain full transparency on masked pixels.
 |
Note SaveBitmapToPNGFile generates a 32-bit .png file regardless of the pixel depth of the original bitmap. |
Parameters
| Input | ||
| Name | Type | Description |
| bitmapID | int | ID of the bitmap object that contains the image. You can obtain the ID from functions such as NewBitmapEx and GetCtrlBitmap. |
| filename | char [] | Pathname of the file in which to save the image. You can use a complete pathname or a simple filename. If the name is a simple filename, the file is saved in the directory that contains the executable. |
Return Value
| Name | Type | Description |
| status | int | Return value indicating whether the function was successful. A negative number indicates that an error occurred. |
Additional Information
Library: User Interface Library
Include file: userint.h
LabWindows/CVI compatibility: LabWindows/CVI 8.0 and later
Example
Refer to apps\iconedit\iconedit.cws for an example of using the SaveBitmapToPNGFile function.