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gpu: fix layer blending regression, fixes yoshi touch and go

This commit is contained in:
zeromus 2009-07-18 18:32:10 +00:00
parent d8b3a0581d
commit f9592ea6d1
1 changed files with 4 additions and 3 deletions
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7
desmume/src/GPU.cpp
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@ -943,8 +943,8 @@ FORCEINLINE void GPU::renderline_checkWindows(u16 x, bool &draw, bool &effect) c
template<bool BACKDROP, BlendFunc FUNC, bool WINDOW>
FORCEINLINE FASTCALL bool GPU::_master_setFinalBGColor(u16 &color, const u32 x)
{
//no further analysis for no special effects. just draw it.
if(FUNC == None) return true;
//no further analysis for no special effects. on backdrops. just draw it.
if(FUNC==None && BACKDROP) return true;
//blend backdrop with what?? this doesn't make sense
if(FUNC==Blend && BACKDROP) return true;
@ -2290,7 +2290,6 @@ static void GPU_ligne_layer(NDS_Screen * screen, u16 l)
gpu->currBgNum = 5;
switch(gpu->setFinalColorBck_funcNum) {
case 0: case 1: //for backdrops, (even with window enabled) none and blend are both the same: just copy the color
case 4: case 5:
memset_u16_le<256>(gpu->currDst,backdrop_color);
break;
case 2:
@ -2303,6 +2302,8 @@ static void GPU_ligne_layer(NDS_Screen * screen, u16 l)
break;
//windowed fades need special treatment
case 4: for(int x=0;x<256;x++) gpu->___setFinalColorBck<false,true,4>(backdrop_color,x,1); break;
case 5: for(int x=0;x<256;x++) gpu->___setFinalColorBck<false,true,5>(backdrop_color,x,1); break;
case 6: for(int x=0;x<256;x++) gpu->___setFinalColorBck<false,true,6>(backdrop_color,x,1); break;
case 7: for(int x=0;x<256;x++) gpu->___setFinalColorBck<false,true,7>(backdrop_color,x,1); break;
}