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SDL: fix various OSD message artifacts

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On the OpenPandora handheld, the OSD message would not render unless you
moved the cursor in the area where it was supposed to show.
Additionally, the OSD message was not transparent like in v1.8.
This commit fixes both these issues.
This commit is contained in:
Patrik Dahlstrom 2017-11-09 22:39:42 +00:00 committed by Thierry Crozat
parent 0ffbce5bb1
commit bf85ad820c
1 changed files with 6 additions and 1 deletions
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7
backends/graphics/surfacesdl/surfacesdl-graphics.cpp
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@ -2293,6 +2293,11 @@ void SurfaceSdlGraphicsManager::displayMessageOnOSD(const char *msg) {
// Init the OSD display parameters, and the fade out
_osdMessageAlpha = SDL_ALPHA_TRANSPARENT + kOSDInitialAlpha * (SDL_ALPHA_OPAQUE - SDL_ALPHA_TRANSPARENT) / 100;
_osdMessageFadeStartTime = SDL_GetTicks() + kOSDFadeOutDelay;
// Enable alpha blending
SDL_SetAlpha(_osdMessageSurface, SDL_RLEACCEL | SDL_SRCALPHA, _osdMessageAlpha);
// Ensure a full redraw takes place next time the screen is updated
_forceRedraw = true;
}
SDL_Rect SurfaceSdlGraphicsManager::getOSDMessageRect() const {
@ -2381,7 +2386,7 @@ void SurfaceSdlGraphicsManager::updateOSD() {
const int startAlpha = SDL_ALPHA_TRANSPARENT + kOSDInitialAlpha * (SDL_ALPHA_OPAQUE - SDL_ALPHA_TRANSPARENT) / 100;
_osdMessageAlpha = startAlpha + diff * (SDL_ALPHA_TRANSPARENT - startAlpha) / kOSDFadeOutDuration;
}
SDL_SetAlpha(_osdMessageSurface, SDL_RLEACCEL | SDL_SRCCOLORKEY | SDL_SRCALPHA, _osdMessageAlpha);
SDL_SetAlpha(_osdMessageSurface, SDL_RLEACCEL | SDL_SRCALPHA, _osdMessageAlpha);
_forceRedraw = true;
}