thirdparty/scummvm
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GRAPHICS: Add a Normal5x scaler

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Cameron Cawley 2021-05-05 23:57:59 +01:00 • committed by Filippos Karapetis
parent 4500cc8451
commit 909be8a933
1 changed files with 58 additions and 1 deletions
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59
graphics/scaler/normal.cpp
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@ -28,6 +28,7 @@ NormalPlugin::NormalPlugin() {
_factors.push_back(2);
_factors.push_back(3);
_factors.push_back(4);
_factors.push_back(5);
#endif
}
@ -164,6 +165,56 @@ void Normal4x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPit
dstPtr += dstPitch4;
}
}
/**
* Trivial nearest-neighbor 5x scaler.
*/
template<typename Pixel>
void Normal5x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
int width, int height) {
uint8 *r;
const uint32 dstPitch2 = dstPitch * 2;
const uint32 dstPitch3 = dstPitch * 3;
const uint32 dstPitch4 = dstPitch * 4;
const uint32 dstPitch5 = dstPitch * 5;
int b = sizeof(Pixel);
assert(IS_ALIGNED(dstPtr, 2));
while (height--) {
r = dstPtr;
for (int i = 0; i < width; ++i, r += b * 5) {
Pixel color = *(((const Pixel *)srcPtr) + i);
*(Pixel *)(r + b * 0) = color;
*(Pixel *)(r + b * 1) = color;
*(Pixel *)(r + b * 2) = color;
*(Pixel *)(r + b * 3) = color;
*(Pixel *)(r + b * 4) = color;
*(Pixel *)(r + b * 0 + dstPitch) = color;
*(Pixel *)(r + b * 1 + dstPitch) = color;
*(Pixel *)(r + b * 2 + dstPitch) = color;
*(Pixel *)(r + b * 3 + dstPitch) = color;
*(Pixel *)(r + b * 4 + dstPitch) = color;
*(Pixel *)(r + b * 0 + dstPitch2) = color;
*(Pixel *)(r + b * 1 + dstPitch2) = color;
*(Pixel *)(r + b * 2 + dstPitch2) = color;
*(Pixel *)(r + b * 3 + dstPitch2) = color;
*(Pixel *)(r + b * 4 + dstPitch2) = color;
*(Pixel *)(r + b * 0 + dstPitch3) = color;
*(Pixel *)(r + b * 1 + dstPitch3) = color;
*(Pixel *)(r + b * 2 + dstPitch3) = color;
*(Pixel *)(r + b * 3 + dstPitch3) = color;
*(Pixel *)(r + b * 4 + dstPitch3) = color;
*(Pixel *)(r + b * 0 + dstPitch4) = color;
*(Pixel *)(r + b * 1 + dstPitch4) = color;
*(Pixel *)(r + b * 2 + dstPitch4) = color;
*(Pixel *)(r + b * 3 + dstPitch4) = color;
*(Pixel *)(r + b * 4 + dstPitch4) = color;
}
srcPtr += srcPitch;
dstPtr += dstPitch5;
}
}
#endif
void NormalPlugin::scaleIntern(const uint8 *srcPtr, uint32 srcPitch,
@ -184,6 +235,9 @@ void NormalPlugin::scaleIntern(const uint8 *srcPtr, uint32 srcPitch,
case 4:
Normal4x<uint16>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
break;
case 5:
Normal5x<uint16>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
break;
}
} else {
assert(_format.bytesPerPixel == 4);
@ -197,6 +251,9 @@ void NormalPlugin::scaleIntern(const uint8 *srcPtr, uint32 srcPitch,
case 4:
Normal4x<uint32>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
break;
case 5:
Normal5x<uint32>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
break;
}
}
#endif
@ -204,7 +261,7 @@ void NormalPlugin::scaleIntern(const uint8 *srcPtr, uint32 srcPitch,
uint NormalPlugin::increaseFactor() {
#ifdef USE_SCALERS
if (_factor < 4)
if (_factor < 5)
setFactor(_factor + 1);
#endif
return _factor;