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desmume
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- Rearranged and made window checks just when needed, to get a bit more speed

This commit is contained in:
shashclp 2007-01-26 06:28:32 +00:00
parent 18b51141ca
commit 4f32c12385
1 changed files with 39 additions and 41 deletions
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80
desmume/src/GPU.c
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@ -502,29 +502,40 @@ INLINE BOOL withinRect (u8 x,u8 y, u16 startX, u16 startY, u16 endX, u16 endY)
}
BOOL renderline_checkWindows(GPU *gpu, u8 bgnum, u16 x, u16 y, BOOL *draw, BOOL *effect)
// Now assumes that *draw and *effect are different from 0 when called, so we can avoid
// setting some values twice
void renderline_checkWindows(GPU *gpu, u8 bgnum, u16 x, u16 y, BOOL *draw, BOOL *effect)
{
BOOL win0,win1,winOBJ,outwin;
BOOL wwin0, wwin1, wwobj, wwout, windows;
BOOL wwin0=0, wwin1=0, wwobj=0, windows=0;
// find who owns the BG
windows= gpu->dispCnt.bits.Win0_Enable
|| gpu->dispCnt.bits.Win1_Enable
|| gpu->dispCnt.bits.WinOBJ_Enable;
// Check if win0 if enabled, and only check if it is
if (gpu->dispCnt.bits.Win0_Enable)
{
wwin0 = withinRect( x,y,
gpu->WINDOW_XDIM[0].bits.start,gpu->WINDOW_YDIM[0].bits.start,
gpu->WINDOW_XDIM[0].bits.end, gpu->WINDOW_YDIM[0].bits.end);
windows = 1;
}
wwin0 = withinRect( x,y,
gpu->WINDOW_XDIM[0].bits.start,gpu->WINDOW_YDIM[0].bits.start,
gpu->WINDOW_XDIM[0].bits.end, gpu->WINDOW_YDIM[0].bits.end);
wwin1 = withinRect( x,y,
gpu->WINDOW_XDIM[1].bits.start,gpu->WINDOW_YDIM[1].bits.start,
gpu->WINDOW_XDIM[1].bits.end, gpu->WINDOW_YDIM[1].bits.end);
wwobj = gpu->sprWin[y][x];
// Check if win1 if enabled, and only check if it is
if (gpu->dispCnt.bits.Win1_Enable)
{
wwin1 = withinRect( x,y,
gpu->WINDOW_XDIM[1].bits.start,gpu->WINDOW_YDIM[1].bits.start,
gpu->WINDOW_XDIM[1].bits.end, gpu->WINDOW_YDIM[1].bits.end);
windows = 1;
}
if (gpu->dispCnt.bits.WinOBJ_Enable)
{
wwobj = gpu->sprWin[y][x];
windows = 1;
}
if (windows) {
wwin0 = wwin0 && gpu->dispCnt.bits.Win0_Enable;
wwin1 = wwin1 && gpu->dispCnt.bits.Win1_Enable;
wwobj = wwobj && gpu->dispCnt.bits.WinOBJ_Enable;
wwout = !(wwin0||wwin1||wwobj);
/*
// HOW THE HELL THIS DOES NOT WORK !!!
@ -535,44 +546,31 @@ BOOL renderline_checkWindows(GPU *gpu, u8 bgnum, u16 x, u16 y, BOOL *draw, BOOL
// CHECK THE FOLLOWING, SAME MEANING BUT IT WORKS
*/
win0 = (gpu->WINDOW_INCNT.bytes.low >> bgnum)&1;
win1 = (gpu->WINDOW_INCNT.bytes.high >> bgnum)&1;
outwin = (gpu->WINDOW_OUTCNT.bytes.low >> bgnum)&1;
winOBJ = (gpu->WINDOW_OUTCNT.bytes.high>> bgnum)&1;
// it is in win0, do we display ?
// high priority
if (wwin0) {
*draw = win0 ;
*effect = gpu->WINDOW_INCNT.bits.WIN0_Effect_Enable&&1;
return TRUE;
*draw = (gpu->WINDOW_INCNT.bytes.low >> bgnum)&1;
*effect = gpu->WINDOW_INCNT.bits.WIN0_Effect_Enable;
}
// it is in win1, do we display ?
// mid priority
if (wwin1) {
*draw = win1;
*effect = gpu->WINDOW_INCNT.bits.WIN1_Effect_Enable&&1;
return TRUE;
else if (wwin1) {
*draw = (gpu->WINDOW_INCNT.bytes.high >> bgnum)&1;
*effect = gpu->WINDOW_INCNT.bits.WIN1_Effect_Enable;
}
// it is in winOBJ, do we display ?
// low priority
if (wwobj) {
*draw = winOBJ;
*effect = gpu->WINDOW_OUTCNT.bits.WIN1_Effect_Enable&&1;
return TRUE;
else if (wwobj) {
*draw = (gpu->WINDOW_OUTCNT.bytes.low >> bgnum)&1;
*effect = gpu->WINDOW_OUTCNT.bits.WIN1_Effect_Enable;
}
// it is outside of windows, do we display ?
// fallback
if (wwout) {
*draw = outwin;
*effect = gpu->WINDOW_OUTCNT.bits.WIN0_Effect_Enable&&1;
return TRUE;
else if (!(wwin0||wwin1||wwobj)) {
*draw = (gpu->WINDOW_OUTCNT.bytes.high>> bgnum)&1;
*effect = gpu->WINDOW_OUTCNT.bits.WIN0_Effect_Enable;
}
}
// now windows or no rule
*draw = TRUE;
*effect = TRUE;
return FALSE;
}
INLINE void renderline_setFinalColor(GPU *gpu,u32 passing,u8 bgnum,u8 *dst,u16 color,u16 x, u16 y) {
@ -580,7 +578,7 @@ INLINE void renderline_setFinalColor(GPU *gpu,u32 passing,u8 bgnum,u8 *dst,u16 c
/* window priority: insides, if no rule, check outside */
renderline_checkWindows(gpu,bgnum,x,y,&windowDraw,&windowEffect);
if ((gpu->BLDCNT & (1 << bgnum)) && (windowEffect==TRUE)) /* the bg to draw has a special color effect */
if ((gpu->BLDCNT & (1 << bgnum)) && (windowEffect)) /* the bg to draw has a special color effect */
{
switch (gpu->BLDCNT & 0xC0) /* type of special color effect */
{
@ -652,7 +650,7 @@ INLINE void renderline_setFinalColor(GPU *gpu,u32 passing,u8 bgnum,u8 *dst,u16 c
}
} else {
/* only draw when effect is enabled on this pixel as source, or drawing itself is enabled */
if (((windowEffect==TRUE) && (gpu->BLDCNT & (0x100 << bgnum))) || (windowDraw == TRUE))
if (((windowEffect) && (gpu->BLDCNT & (0x100 << bgnum))) || (windowDraw))
T2WriteWord(dst, passing, color) ;
}
} ;