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Use function pointer to save having to do if/else if scale check on every pixel. Makes ModernDeemphColorMap slightly more efficient.

This commit is contained in:
mjbudd77 2021-06-19 09:37:24 -04:00
parent f20fea7b90
commit 45779c4331
1 changed files with 36 additions and 9 deletions
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45
src/drivers/common/vidblit.cpp
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@ -485,7 +485,9 @@ template<int SCALE> static u32 _ModernDeemphColorMap(u8* src, u8* srcbuf)
//if it was a deemph'd value, grab it from the deemph palette
if(deemph != 0)
color = palettetranslate[256+(pixel&0x3F)+deemph*64];
{
color = palettetranslate[256+(pixel&0x3F)+(deemph*64)];
}
return color;
}
@ -504,6 +506,26 @@ u32 ModernDeemphColorMap(u8* src, u8* srcbuf, int scale)
else { abort(); return 0; }
}
typedef u32 (*ModernDeemphColorMapFuncPtr)( u8*, u8* );
static ModernDeemphColorMapFuncPtr getModernDeemphColorMapFunc(int scale)
{
ModernDeemphColorMapFuncPtr ptr = NULL;
if(scale == 1) ptr = &_ModernDeemphColorMap<1>;
else if(scale == 2) ptr = &_ModernDeemphColorMap<2>;
else if(scale == 3) ptr = &_ModernDeemphColorMap<3>;
else if(scale == 4) ptr = &_ModernDeemphColorMap<4>;
else if(scale == 5) ptr = &_ModernDeemphColorMap<5>;
else if(scale == 6) ptr = &_ModernDeemphColorMap<6>;
else if(scale == 7) ptr = &_ModernDeemphColorMap<7>;
else if(scale == 8) ptr = &_ModernDeemphColorMap<8>;
else if(scale == 9) ptr = &_ModernDeemphColorMap<9>;
else { abort(); ptr = NULL; }
return ptr;
}
void Blit8ToHigh(uint8 *src, uint8 *dest, int xr, int yr, int pitch, int xscale, int yscale)
{
int x,y;
@ -519,6 +541,7 @@ void Blit8ToHigh(uint8 *src, uint8 *dest, int xr, int yr, int pitch, int xscale,
{
int mult;
int base;
ModernDeemphColorMapFuncPtr ModernDeemphColorMapFunc = NULL;
// -Video Modes Tag-
if(silt == 2) mult = 2;
@ -531,6 +554,8 @@ void Blit8ToHigh(uint8 *src, uint8 *dest, int xr, int yr, int pitch, int xscale,
if(mdcmxs != mdcmys)
abort();
ModernDeemphColorMapFunc = getModernDeemphColorMapFunc( mdcmxs );
xr *= mult;
yr *= mult;
xscale=yscale=1;
@ -545,7 +570,7 @@ void Blit8ToHigh(uint8 *src, uint8 *dest, int xr, int yr, int pitch, int xscale,
{
for(x=xr;x;x--)
{
*(uint32 *)dest=ModernDeemphColorMap(src,specbuf8bpp,mdcmxs);
*(uint32 *)dest=ModernDeemphColorMapFunc(src,specbuf8bpp);
dest+=4;
src++;
}
@ -558,7 +583,7 @@ void Blit8ToHigh(uint8 *src, uint8 *dest, int xr, int yr, int pitch, int xscale,
{
for(x=xr;x;x--)
{
uint32 tmp=ModernDeemphColorMap(src,specbuf8bpp,mdcmxs);
uint32 tmp=ModernDeemphColorMapFunc(src,specbuf8bpp);
*(uint8 *)dest=tmp;
*((uint8 *)dest+1)=tmp>>8;
*((uint8 *)dest+2)=tmp>>16;
@ -598,7 +623,7 @@ void Blit8ToHigh(uint8 *src, uint8 *dest, int xr, int yr, int pitch, int xscale,
{
for(x=xr; x; x--)
{
*(uint32 *)dest = ModernDeemphColorMap(src,XBuf,1);
*(uint32 *)dest = _ModernDeemphColorMap<1>(src,XBuf);
dest += 4;
src++;
}
@ -609,9 +634,11 @@ void Blit8ToHigh(uint8 *src, uint8 *dest, int xr, int yr, int pitch, int xscale,
{
uint32 *s = prescalebuf;
uint32 *d = (uint32 *)destbackup; // use 32-bit pointers ftw
int subpixel;
int subpixel,yend;
for (y=0; y<yr*yscale; y++)
yend = yr*yscale;
for (y=0; y<yend; y++)
{
int back = xr*(y%yscale>0); // bool as multiplier
for (x=0; x<xr; x++)
@ -937,7 +964,7 @@ void Blit8ToHigh(uint8 *src, uint8 *dest, int xr, int yr, int pitch, int xscale,
for(x=xr;x;x--)
{
//THE MAIN BLITTING CODEPATH (there may be others that are important)
*(uint32 *)dest = ModernDeemphColorMap(src,XBuf,1);
*(uint32 *)dest = _ModernDeemphColorMap<1>(src,XBuf);
dest+=4;
src++;
}
@ -950,7 +977,7 @@ void Blit8ToHigh(uint8 *src, uint8 *dest, int xr, int yr, int pitch, int xscale,
{
for(x=xr;x;x--)
{
uint32 tmp = ModernDeemphColorMap(src,XBuf,1);
uint32 tmp = _ModernDeemphColorMap<1>(src,XBuf);
*(uint8 *)dest=tmp;
*((uint8 *)dest+1)=tmp>>8;
*((uint8 *)dest+2)=tmp>>16;
@ -966,7 +993,7 @@ void Blit8ToHigh(uint8 *src, uint8 *dest, int xr, int yr, int pitch, int xscale,
{
for(x=xr;x;x--)
{
*(uint16 *)dest = ModernDeemphColorMap(src,XBuf,1);
*(uint16 *)dest = _ModernDeemphColorMap<1>(src,XBuf);
dest+=2;
src++;
}