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VideoMixer.OSDItemPictureMemoryAdd method |
  
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VideoMixer.OSDItemPictureMemoryAdd method |
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Remarks
Adds a new graphical item to the On-Screen-Display (OSD) by getting its representation from a picture file stored inside a memory buffer.
For further details about the use of the embedded video mixer see the VideoMixer object section.
For details about video mixing/blending refer to the How to use the video mixer tutorial.
Syntax
[Visual Basic] control.VideoMixer.OSDItemPictureMemoryAdd ( nMixerUniqueId as Long, pBuffer as Variant, nBufferLength as Long, fLeftPos as Single, fTopPos as Single, nAlpha as Integer, nZOrder as Long, bShow as enumBoolean ) as Long |
[C++] long control.VideoMixer.OSDItemPictureMemoryAdd ( long nMixerUniqueId, const VARIANT FAR& pBuffer, long nBufferLength, float fLeftPos, float fTopPos, short nAlpha, long nZOrder, short bShow ); |
Parameter |
Description |
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nMixerUniqueId |
Unique identifier of the video mixer returned by a previous call to the VideoMixer.Create method |
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pBuffer |
Variant parameter containing the pointer to the picture file previously loaded in memory. The picture can be modified at a later time through the VideoMixer.OSDItemPictureMemoryChange method. Accepted picture formats to store inside the memory buffer are BMP, GIF, JPEG and PNG. |
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nBufferLength |
Length in bytes of the given buffer |
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fLeftPos |
Horizontal position, expressed in percentage of the On-Screen-Display (OSD) area, where the item will be rendered. Position can be moved at a later time through the VideoMixer.OSDItemMove method. |
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fTopPos |
Vertical position, expressed in percentage of the On-Screen-Display (OSD) area, where the item will be rendered. Position can be moved at a later time through the VideoMixer.OSDItemMove method. |
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nAlpha |
Alpha channel transparency, expressed in percentage, applied to the item when rendered. Values can range from 0 (total opacity) to 100 (total transparency). The alpha channel transparency of the item can be modified at a later time through the VideoMixer.OSDItemAlphaSet method. |
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nZOrder |
Z-Order of the item. Items with a lower Z-Order value will stay on top respect to other Items having a higher Z-Order value; for example, an Item with Z-Order 0 will stay on top of any other Item but, in case two Items should be assigned the same Z-Order, the latest one having got the same Z-Order will be placed on top of the previous one. The Z-Order of the item can be modified at a later time through the VideoMixer.OSDItemZOrderSet method. |
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bShow |
Boolean flag that specifies if the item must be initially visible or hidden. Supported values are the following:
Visibility can be modified at a later time through the VideoMixer.OSDItemShow method. |
Return value
Value |
Meaning |
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0 |
An error occurred (see the LastError property for further error details) |
Other values |
Unique identifier of the graphical item: this unique identifier will be used in order to invoke further methods related to the use of this specific item |
