thirdparty/scummvm
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added some simple (8bit) 1x/2x/3x scalers, could probably be optimized

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svn-id: r4187
This commit is contained in:
Max Horn 2002-05-04 00:05:45 +00:00
parent bcae301bf7
commit 479791a23e
1 changed files with 64 additions and 0 deletions
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64
2xsai.cpp
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@ -761,3 +761,67 @@ void AdvMame2x(uint8 *srcPtr, uint32 srcPitch, uint8 *null, uint8 *dstPtr, uint3
q += nextlineDst << 1;
}
}
/* Beware! Contrary to the other functions in this file, this blits from 8 to 8 bit! */
void Normal1x(uint8 *srcPtr, uint32 srcPitch, uint8 *null, uint8 *dstPtr, uint32 dstPitch, int width, int height)
{
uint8* r;
for(int j = 0; j < height; ++j) {
r = dstPtr;
for(int i = 0; i < width; ++i, ++r) {
uint8 color = *(srcPtr + i );
*r = color;
}
srcPtr += srcPitch;
dstPtr += dstPitch;
}
}
/* Beware! Contrary to the other functions in this file, this blits from 8 to 8 bit! */
void Normal2x(uint8 *srcPtr, uint32 srcPitch, uint8 *null, uint8 *dstPtr, uint32 dstPitch, int width, int height)
{
uint8* r;
for(int j = 0; j < height; ++j) {
r = dstPtr;
for(int i = 0; i < width; ++i, r+=2) {
uint8 color = *(srcPtr + i );
*(r) = color;
*(r + 1) = color;
*(r + dstPitch) = color;
*(r + dstPitch + 1) = color;
}
srcPtr += srcPitch;
dstPtr += dstPitch << 1;
}
}
/* Beware! Contrary to the other functions in this file, this blits from 8 to 8 bit! */
void Normal3x(uint8 *srcPtr, uint32 srcPitch, uint8 *null, uint8 *dstPtr, uint32 dstPitch, int width, int height)
{
uint8* r;
uint32 dstPitch2 = dstPitch << 1;
for(int j = 0; j < height; ++j) {
r = dstPtr;
for(int i = 0; i < width; ++i, r+=3) {
uint8 color = *(srcPtr + i);
*(r + 0) = color;
*(r + 1) = color;
*(r + 2) = color;
*(r + 0 + dstPitch) = color;
*(r + 1 + dstPitch) = color;
*(r + 2 + dstPitch) = color;
*(r + 0 + dstPitch2) = color;
*(r + 1 + dstPitch2) = color;
*(r + 2 + dstPitch2) = color;
}
srcPtr += srcPitch;
dstPtr += dstPitch * 3;
}
}