cgxvideo
Index
ULONG AttachVLayerTagList(
struct VLayerHandle * VLayerHandle,
struct Window * Window,
struct TagItem * TagItems );
ULONG AttachVLayerTags(
struct VLayerHandle * VLayerHandle,
struct Window * Window,
TAG tag, ... );
Attaches a previously created videolayer handle to the specified window.
The video overlay should now be dynamically linked to the window.
If the window is moved or resized, the overlay is also moved or resized.
VLayerHandle - pointer to a previously created videolayer handle
Window - pointer to the window that the videolayer should be attached to
TagItems - pointer to an optional tag list
result - 0 if videolayer could be attached to the window
Tags available are:
VOA_LeftIndent (ULONG) - additional offset from the left window border
VOA_RightIndent (ULONG) - additional offset from the right window border
VOA_TopIndent (ULONG) - additional offset from the top window border
VOA_BottomIndent (ULONG) - additional offset from the bottom window border
This function is unimplemented.
struct VLayerHandle * CreateVLayerHandleTagList(
struct Screen * Screen,
struct TagItem * TagItems );
struct VLayerHandle * CreateVLayerHandleTags(
struct Screen * Screen,
TAG tag, ... );
Creates a video layer handle for the given screen
Screen - Screen we wish to create a handle for
TagItems - pointer to an optional tag list
VLayerHandle - pointer to the created videolayer handle or 0
Tags available are:
VOA_SrcType (ULONG) - specifies source type that is used for video
overlay data
Currently supported formats:
SRCFMT_YUV16 (not recommended, use YCbCr16 instead)
SRCFMT_YCbCr16
SRCFMT_RGB15PC
SRCFMT_RGB16PC
VOA_SrcWidth (ULONG) - source width in pixel units
VOA_SrcHeight (ULONG) - source height in pixel units
VOA_Error (ULONG *) - If you specify VOA_Error with ti_Data pointing
to an ULONG, you will get more detailed information
if the creation of the video layer handle fails
VOA_UseColorKey (BOOL) - If you specify VOA_UseColorKey as TRUE, color
keying is enabled for the video layer. A
certain color key is generated then and the
stream data is only visible where this color
could be found.
VOA_UseBackFill (BOOL) - If you specify VOA_UseBackFill as TRUE automatic
backfilling for the videolayer is enabled. This
option is only available if color keying is
enabled.
void DeleteVLayerHandle(
struct VLayerHandle * VLayerHandle );
Deletes a created video layer handle
VLayerHandle - pointer to a previously created videolayer handle
ULONG DetachVLayer(
struct VLayerHandle * VLayerHandle );
Detaches a videolayer from a given window. As a result, the video
overlay should now be unlinked from the window and the original
contents of the window are visible now.
VLayerHandle - pointer to a previously created videolayer handle
result - 0 if videolayer could be detached from the window
This function is unimplemented.
IPTR GetVLayerAttr(
struct VLayerHandle * VLayerHandle,
ULONG AttrNum );
Gets a certain attribute from a given video layer. You have to call
LockVLayer() to make sure that the result is valid !
VLayerHandle - pointer to a previously created videolayer handle
AttrNum - attribute that you want to get
value - the value for the given attribute
Attributes available are:
VOA_BaseAddress - if this attribute is specified the base address for
the source data is returned
VOA_ColorKeyPen - returns the pen number used for color keying. If color
keying is not enabled, -1 is returned
VOA_ColorKey - returns the 24 bit color value used for color keying.
If color keying is not enabled, -1 is returned.
This function is unimplemented.
ULONG LockVLayer(
struct VLayerHandle * VLayerHandle );
Locks the specified video layer to allow access to source data. Make
sure that you don't keep that lock for too long. It is only allowed
to keep it for a short time.
VLayerHandle - pointer to a previously created videolayer handle
result - TRUE if video layer could be locked, FALSE otherwise
This function is unimplemented.
void SetVLayerAttrTagList(
struct VLayerHandle * VLayerHandle,
struct TagItem * TagItems );
void SetVLayerAttrTags(
struct VLayerHandle * VLayerHandle,
TAG tag, ... );
Sets certain attributes for a given video layer
VLayerHandle - pointer to a previously created videolayer handle
TagItems - pointer to a tag list which contains attributes to be
modified
Tags available are:
VOA_LeftIndent (ULONG) - additional offset from the left window
border
VOA_RightIndent (ULONG) - additional offset from the right window
border
VOA_TopIndent (ULONG) - additional offset from the top window border
VOA_BottomIndent (ULONG) - additional offset from the bottom window
border
This function is unimplemented.
void UnlockVLayer(
struct VLayerHandle * VLayerHandle );
Unlocks a previouly locked video layer
VLayerHandle - pointer to a previously created videolayer handle
This function is unimplemented.
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