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Reduce redraws

This commit is contained in:
neauoire 2023-11-12 16:40:09 -08:00
parent a9bf23118c
commit a4ff15e668
1 changed files with 12 additions and 10 deletions
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22
src/devices/screen.c
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@ -69,11 +69,12 @@ screen_2bpp(Uint8 *layer, Uint8 *ram, Uint16 addr, Uint16 x1, Uint16 y1, Uint16
Uint16 x, xmod = (fx > 0 ? 7 : 0), xmax = x1 + xmod - fx * 8;
for(y = y1 + ymod; y != ymax; y += fy) {
Uint16 c = *ch1++ | (*ch2++ << 8);
for(x = x1 + xmod; x != xmax; x -= fx, c >>= 1) {
Uint8 ch = (c & 1) | ((c >> 7) & 2);
if((opaque || ch) && x < w && y < h)
layer[x + y * w] = blending[ch][color];
}
if(y < h)
for(x = x1 + xmod; x != xmax; x -= fx, c >>= 1) {
Uint8 ch = (c & 1) | ((c >> 7) & 2);
if((opaque || ch) && x < w)
layer[x + y * w] = blending[ch][color];
}
}
}
@ -86,11 +87,12 @@ screen_1bpp(Uint8 *layer, Uint8 *ram, Uint16 addr, Uint16 x1, Uint16 y1, Uint16
Uint16 x, xmod = (fx > 0 ? 7 : 0), xmax = x1 + xmod - fx * 8;
for(y = y1 + ymod; y != ymax; y += fy) {
Uint16 c = *ch1++;
for(x = x1 + xmod; x != xmax; x -= fx, c >>= 1) {
Uint8 ch = c & 1;
if((opaque || ch) && x < w && y < h)
layer[x + y * w] = blending[ch][color];
}
if(y < h)
for(x = x1 + xmod; x != xmax; x -= fx, c >>= 1) {
Uint8 ch = c & 1;
if((opaque || ch) && x < w)
layer[x + y * w] = blending[ch][color];
}
}
}