Added missing IVRScreenshots interface declaration to openvr.h.

[git-p4: depot-paths = "//vr/steamvr/sdk_release/": change = 3492671]

headers/openvr.h

@@ -2821,6 +2821,114 @@ static const char * const IVRTrackedCamera_Version = "IVRTrackedCamera_003";
 
 } // namespace vr
 
+
+// ivrscreenshots.h
+namespace vr
+{
+
+/** Errors that can occur with the VR compositor */
+enum EVRScreenshotError
+{
+	VRScreenshotError_None							= 0,
+	VRScreenshotError_RequestFailed					= 1,
+	VRScreenshotError_IncompatibleVersion			= 100,
+	VRScreenshotError_NotFound						= 101,
+	VRScreenshotError_BufferTooSmall				= 102,
+	VRScreenshotError_ScreenshotAlreadyInProgress	= 108,
+};
+
+/** Allows the application to generate screenshots */
+class IVRScreenshots
+{
+public:
+	/** Request a screenshot of the requested type.
+	 *  A request of the VRScreenshotType_Stereo type will always
+	 *  work. Other types will depend on the underlying application
+	 *  support.
+	 *  The first file name is for the preview image and should be a
+	 *  regular screenshot (ideally from the left eye). The second
+	 *  is the VR screenshot in the correct format. They should be
+	 *  in the same aspect ratio.  Formats per type:
+	 *  VRScreenshotType_Mono: the VR filename is ignored (can be
+	 *  nullptr), this is a normal flat single shot.
+	 *  VRScreenshotType_Stereo:  The VR image should be a
+	 *  side-by-side with the left eye image on the left.
+	 *  VRScreenshotType_Cubemap: The VR image should be six square
+	 *  images composited horizontally.
+	 *  VRScreenshotType_StereoPanorama: above/below with left eye
+	 *  panorama being the above image.  Image is typically square
+	 *  with the panorama being 2x horizontal.
+	 *  
+	 *  Note that the VR dashboard will call this function when
+	 *  the user presses the screenshot binding (currently System
+	 *  Button + Trigger).  If Steam is running, the destination
+	 *  file names will be in %TEMP% and will be copied into
+	 *  Steam's screenshot library for the running application
+	 *  once SubmitScreenshot() is called.
+	 *  If Steam is not running, the paths will be in the user's
+	 *  documents folder under Documents\SteamVR\Screenshots.
+	 *  Other VR applications can call this to initate a
+	 *  screenshot outside of user control.
+	 *  The destination file names do not need an extension,
+	 *  will be replaced with the correct one for the format
+	 *  which is currently .png. */
+	virtual vr::EVRScreenshotError RequestScreenshot( vr::ScreenshotHandle_t *pOutScreenshotHandle, vr::EVRScreenshotType type, const char *pchPreviewFilename, const char *pchVRFilename ) = 0;
+
+	/** Called by the running VR application to indicate that it
+	 *  wishes to be in charge of screenshots.  If the
+	 *  application does not call this, the Compositor will only
+	 *  support VRScreenshotType_Stereo screenshots that will be
+	 *  captured without notification to the running app.
+	 *  Once hooked your application will receive a
+	 *  VREvent_RequestScreenshot event when the user presses the
+	 *  buttons to take a screenshot. */
+	virtual vr::EVRScreenshotError HookScreenshot( VR_ARRAY_COUNT( numTypes ) const vr::EVRScreenshotType *pSupportedTypes, int numTypes ) = 0;
+
+	/** When your application receives a
+	 *  VREvent_RequestScreenshot event, call these functions to get
+	 *  the details of the screenshot request. */
+	virtual vr::EVRScreenshotType GetScreenshotPropertyType( vr::ScreenshotHandle_t screenshotHandle, vr::EVRScreenshotError *pError ) = 0;
+
+	/** Get the filename for the preview or vr image (see
+	 *  vr::EScreenshotPropertyFilenames).  The return value is
+	 *  the size of the string.   */
+ 	virtual uint32_t GetScreenshotPropertyFilename( vr::ScreenshotHandle_t screenshotHandle, vr::EVRScreenshotPropertyFilenames filenameType, VR_OUT_STRING() char *pchFilename, uint32_t cchFilename, vr::EVRScreenshotError *pError ) = 0;
+
+	/** Call this if the application is taking the screen shot
+	 *  will take more than a few ms processing. This will result
+	 *  in an overlay being presented that shows a completion
+	 *  bar. */
+	virtual vr::EVRScreenshotError UpdateScreenshotProgress( vr::ScreenshotHandle_t screenshotHandle, float flProgress ) = 0;
+
+	/** Tells the compositor to take an internal screenshot of
+	 *  type VRScreenshotType_Stereo. It will take the current
+	 *  submitted scene textures of the running application and
+	 *  write them into the preview image and a side-by-side file
+	 *  for the VR image.
+	 *  This is similiar to request screenshot, but doesn't ever
+	 *  talk to the application, just takes the shot and submits. */
+	virtual vr::EVRScreenshotError TakeStereoScreenshot( vr::ScreenshotHandle_t *pOutScreenshotHandle, const char *pchPreviewFilename, const char *pchVRFilename ) = 0;
+
+	/** Submit the completed screenshot.  If Steam is running
+	 *  this will call into the Steam client and upload the
+	 *  screenshot to the screenshots section of the library for
+	 *  the running application.  If Steam is not running, this
+	 *  function will display a notification to the user that the
+	 *  screenshot was taken. The paths should be full paths with
+	 *  extensions.
+	 *  File paths should be absolute including
+	 *  exntensions.
+	 *  screenshotHandle can be k_unScreenshotHandleInvalid if this
+	 *  was a new shot taking by the app to be saved and not
+	 *  initiated by a user (achievement earned or something) */
+	virtual vr::EVRScreenshotError SubmitScreenshot( vr::ScreenshotHandle_t screenshotHandle, vr::EVRScreenshotType type, const char *pchSourcePreviewFilename, const char *pchSourceVRFilename ) = 0;
+};
+
+static const char * const IVRScreenshots_Version = "IVRScreenshots_001";
+
+} // namespace vr
+
+
 // End
 
 #endif // _OPENVR_API