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Added an internal hint to set OpenVR overlay flags

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This commit is contained in:
Sam Lantinga
2026-03-23 15:04:22 -07:00
parent 608416b5a9
commit 299ed51984
1 changed files with 28 additions and 14 deletions
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42
src/video/openvr/SDL_openvrvideo.c
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@@ -568,7 +568,7 @@ static bool OPENVR_SetupJoystickBasedOnLoadedActionManifest(SDL_VideoData * vide
return true;
}
static bool OPENVR_InitializeOverlay(SDL_VideoDevice *_this,SDL_Window *window)
static bool OPENVR_InitializeOverlay(SDL_VideoDevice *_this, SDL_Window *window)
{
SDL_VideoData *videodata = (SDL_VideoData *)_this->internal;
@@ -610,6 +610,32 @@ static bool OPENVR_InitializeOverlay(SDL_VideoDevice *_this,SDL_Window *window)
SDL_free(cursorname);
videodata->bHasShownOverlay = false;
}
{
Uint32 overlay_flags = 0;
const char *hint = SDL_GetHint("SDL_OPENVR_OVERLAY_FLAGS");
if (hint && *hint) {
overlay_flags = SDL_atoi(hint);
} else {
overlay_flags |= (1 << 23); //vr::VROverlayFlags_EnableControlBar
overlay_flags |= (1 << 24); //vr::VROverlayFlags_EnableControlBarKeyboard
overlay_flags |= (1 << 25); //vr::VROverlayFlags_EnableControlBarClose
#if 0
/* OpenVR overlays assume unpremultiplied alpha by default, set this flag to tag the source buffer as premultiplied.
* Note that (as of 2025) OpenVR overlay composition is higher quality when premultiplied buffers are provided,
* as texture samplers that blend energy (such as bilinear) do not yield sensical results when operating on natively
* unpremultiplied textures. It is thus preferable to hand openvr natively premultiplied buffers when accurate
* sampling / composition is required. */
overlay_flags |= (1 << 21); // vr::VROverlayFlags_IsPremultiplied
#endif
}
for (int i = 0; i < sizeof(overlay_flags) * 8; ++i) {
if (overlay_flags & (1 << i)) {
videodata->oOverlay->SetOverlayFlag(videodata->overlayID, (VROverlayFlags)(1 << i), true);
}
}
}
{
const char * hint = SDL_GetHint("SDL_OPENVR_OVERLAY_PANEL_WIDTH");
float fWidth = hint ? (float)SDL_atof(hint) : 1.0f;
@@ -629,7 +655,7 @@ static bool OPENVR_InitializeOverlay(SDL_VideoDevice *_this,SDL_Window *window)
EVROverlayError err = videodata->oOverlay->SetOverlayFromFile(videodata->thumbID, tmpcopy);
SDL_free(tmpcopy);
if (err == EVROverlayError_VROverlayError_None) {
videodata->bIconOverridden = SDL_GetHintBoolean("SDL_OPENVR_WINDOW_ICON_OVERRIDE",false);
videodata->bIconOverridden = SDL_GetHintBoolean("SDL_OPENVR_WINDOW_ICON_OVERRIDE", false);
}
}
}
@@ -646,22 +672,10 @@ static bool OPENVR_InitializeOverlay(SDL_VideoDevice *_this,SDL_Window *window)
return false;
}
global_openvr_driver = videodata;
InitializeMouseFunctions();
// Actually show the overlay.
videodata->oOverlay->SetOverlayFlag(videodata->overlayID, 1<<23, true); //vr::VROverlayFlags_EnableControlBar
videodata->oOverlay->SetOverlayFlag(videodata->overlayID, 1<<24, true); //vr::VROverlayFlags_EnableControlBarKeyboard
videodata->oOverlay->SetOverlayFlag(videodata->overlayID, 1<<25, true); //vr::VROverlayFlags_EnableControlBarClose
#if 0
/* OpenVR overlays assume unpremultiplied alpha by default, set this flag to tag the source buffer as premultiplied.
* Note that (as of 2025) OpenVR overlay composition is higher quality when premultiplied buffers are provided,
* as texture samplers that blend energy (such as bilinear) do not yield sensical results when operating on natively
* unpremultiplied textures. It is thus preferable to hand openvr natively premultiplied buffers when accurate
* sampling / composition is required. */
videodata->oOverlay->SetOverlayFlag(videodata->overlayID, VROverlayFlags_IsPremultiplied, true );
#endif
videodata->oOverlay->SetOverlayName(videodata->overlayID, window->title);
videodata->bDidCreateOverlay = true;