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Adjusted scanline filter (Thanks Tanooki16!) (#970)

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bladeoner 2021-05-17 01:28:47 +02:00 committed by GitHub
parent eb0e39db8f
commit 243865281b
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 20 additions and 10 deletions
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30
source/filter.cpp
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@ -495,16 +495,26 @@ void RenderHQ2X (uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
template<int GuiScale>
void Scanlines (uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height)
{
while (height--) {
uint16 *dp = (uint16 *) dstPtr;
for (int i = 0; i < width; ++i, dp += 2) {
uint16 sp = *((uint16 *)srcPtr + i);
*(dp) = sp;
*(dp + 1) = sp;
*(dp + dstPitch) = 0;
*(dp + dstPitch + 1) = 0;
unsigned int nextlineSrc = srcPitch / sizeof(uint16);
uint16 *p = (uint16 *)srcPtr;
unsigned int nextlineDst = dstPitch / sizeof(uint16);
uint16 *q = (uint16 *)dstPtr;
while(height--) {
for (int i = 0, j = 0; i < width; ++i, j += 2) {
uint16 p1 = *(p + i);
uint32 pi;
pi = (((p1 & Mask_2) * 6) >> 3) & Mask_2;
pi |= (((p1 & Mask13) * 6) >> 3) & Mask13;
*(q + j) = p1;
*(q + j + 1) = p1;
*(q + j + nextlineDst) = (uint16)pi;
*(q + j + nextlineDst + 1) = (uint16)pi;
}
dstPtr += dstPitch<<1;
srcPtr += srcPitch;
p += nextlineSrc;
q += nextlineDst << 1;
}
}