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Reduce redrawing on the loadscreen.

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SDL_Flip() redraws the whole screen if it's not double buffered - we
don't want that.
This commit is contained in:
Karol Nowak 2006-08-04 13:11:50 +00:00
parent 35bd27b987
commit 680e0e719c
1 changed files with 10 additions and 3 deletions
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13
src/loadscreen.cpp
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@ -71,6 +71,7 @@ void loadscreen::set_progress(const int percentage, const std::string &text, con
std::cerr << "loadscreen: Logo image is too big." << std::endl;
}
logo_drawn_ = true;
SDL_UpdateRect(gdis, area.x, area.y, area.w, area.h);
}
int pbx = (scrx - pbw)/2; /* Horizontal location. */
int pby = (scry - pbh)/2 + pby_offset_; /* Vertical location. */
@ -100,18 +101,24 @@ void loadscreen::set_progress(const int percentage, const std::string &text, con
area.w = ((MAX_PERCENTAGE - prcnt_) * pbw) / (MAX_PERCENTAGE - MIN_PERCENTAGE); area.h = pbh;
SDL_FillRect(gdis,&area,SDL_MapRGB(gdis->format,lcr,lcg,lcb));
/* Clear the last text and draw new if text is provided. */
if(text.length()>0)
if(text.length() > 0 && commit)
{
SDL_Rect oldarea = textarea_;
SDL_FillRect(gdis,&textarea_,SDL_MapRGB(gdis->format,0,0,0));
textarea_ = font::line_size(text, font::SIZE_NORMAL);
textarea_.x = scrx/2 + bw + bispw - textarea_.w / 2;
textarea_.y = pby + pbh + 4*(bw + bispw);
textarea_ = font::draw_text(&screen_,textarea_,font::SIZE_NORMAL,font::NORMAL_COLOUR,text,textarea_.x,textarea_.y);
oldarea.x = minimum<int>(textarea_.x, oldarea.x);
oldarea.y = minimum<int>(textarea_.y, oldarea.y);
oldarea.w = maximum<int>(textarea_.w, oldarea.w);
oldarea.h = maximum<int>(textarea_.h, oldarea.h);
SDL_UpdateRect(gdis, oldarea.x, oldarea.y, oldarea.w, oldarea.h);
}
/* Flip the double buffering so the change becomes visible */
/* Update the rectangle if needed */
if(commit)
{
SDL_Flip(gdis);
SDL_UpdateRect(gdis, pbx, pby, pbw + 2*(bw + bispw), pbh + 2*(bw + bispw));
}
}