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Disable alpha and don't add text to tainted area

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While definitely not recommendable, this improves performance
drastically while rendering text on many devices, especially when lots
of text is render one character at a time.
This commit is contained in:
RadialApps 2017-08-08 16:27:42 +05:30
parent 290833c94f
commit 98e3005616
1 changed files with 4 additions and 2 deletions
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6
src/bitmap.cpp
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@ -1079,7 +1079,8 @@ void Bitmap::drawText(const IntRect &rect, const char *str, int align)
Vec2i gpTexSize; Vec2i gpTexSize;
shState->ensureTexSize(txtSurf->w, txtSurf->h, gpTexSize); shState->ensureTexSize(txtSurf->w, txtSurf->h, gpTexSize);
bool fastBlit = !p->touchesTaintedArea(posRect) && txtAlpha == 1.0f; /* Disable alpha for more performance*/
bool fastBlit = !p->touchesTaintedArea(posRect); //&& txtAlpha == 1.0f;
if (fastBlit) if (fastBlit)
{ {
@ -1196,7 +1197,8 @@ void Bitmap::drawText(const IntRect &rect, const char *str, int align)
} }
SDL_FreeSurface(txtSurf); SDL_FreeSurface(txtSurf);
p->addTaintedArea(posRect); /* Remove this for a performance advantage, with a risk */
/* p->addTaintedArea(posRect); */
p->onModified(); p->onModified();
} }