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Copy pathZXGraphicsBitBlit.h
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ZXGraphicsBitBlit.h
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/* WARING: DO NOT EDIT THIS CODE, THIS CODE IS AUTO GENERATED,
SEE zxGraphicsGen.py
Copyright © 2018 errorsoft. All rights reserved. */
#define RawBitBlit(WriteByte1, WriteByte2, WriteByte3, WriteByte4) \
do { \
/* dest and src */ \
ZXData pScan, pSrcScan, pScanEnd; \
ZXData p, pSrc; \
unsigned char b; \
int scan, srcScan; \
/* offsets, flags, etc */ \
int offset, srcOffset, endPixels; \
int fullBytes, endLine; \
int compRealOffset, realOffset; \
int isRegular; \
\
/* calculate the sizes of scan lines */ \
scan = BitmapScanSize(bitmap); \
srcScan = BitmapScanSize(src); \
\
/* get pointers to a byte corresponding to a pixel */ \
pScan = BitmapPixelPtr(bitmap, x, y); \
pSrcScan = BitmapPixelPtr(src, srcX, srcY); \
/* calculating end vertical line */ \
endLine = y + srcHeight; \
\
/* bitmap offset */ \
offset = x % 8; \
/* src offset */ \
srcOffset = srcX % 8; \
\
/* get information about how much pixels should be shifted, */ \
/* important: when (offset < srcOffset) one byte is completely absorbed when outputting the left byte */ \
if(offset >= srcOffset) \
realOffset = offset - srcOffset; \
else \
realOffset = 8 - (srcOffset - offset); \
compRealOffset = 8 - realOffset; \
\
/* count of full-size bytes */ \
fullBytes = CalcFullBytes(x, srcWidth); \
/* offset end pixel */ \
endPixels = (x + srcWidth) % 8; \
/* regular draw or not */ \
/* a) snap to right colum */ \
/* b) snap to left colum */ \
isRegular = (offset + srcWidth >= 8) || (offset == 0); \
\
/* main loop y */ \
for(; y < endLine; y++) { \
p = pScan; \
pSrc = pSrcScan; \
\
/* take care of left byte */ \
/* xxxxxxxx XXXXXXXX xxxxxxxx */ \
/* ^ we here */ \
if(offset != 0) { \
if (offset >= srcOffset) { \
b = *pSrc >> realOffset; \
\
/* need next byte if we haven't real offset */ \
if(realOffset == 0) \
pSrc++; \
} \
else { \
b = (*pSrc << compRealOffset) | \
(*(pSrc + 1) >> realOffset); \
/* we completely used a byte, take a new */ \
pSrc++; \
} \
\
/* combine dest and src */ \
if(isRegular) \
WriteByte1; \
else \
WriteByte2; \
\
p++; \
} \
\
/* main loop x */ \
/* xxxxxxxx XXXXXXXX xxxxxxxx */ \
/* ^ we here */ \
pScanEnd = p + fullBytes; \
if(realOffset != 0) { \
for(; p < pScanEnd; p++) { \
b = (*pSrc << compRealOffset) | \
(*(pSrc + 1) >> realOffset); \
\
/* combine dest and src */ \
WriteByte3; \
\
pSrc++; \
} \
} \
else { \
for(; p < pScanEnd; p++) { \
b = *pSrc; \
\
/* combine dest and src */ \
WriteByte3; \
\
pSrc++; \
} \
} \
\
/* take care of right byte */ \
/* xxxxxxxx XXXXXXXX xxxxxxxx */ \
/* ^ we here */ \
if(isRegular && endPixels) { \
if(realOffset != 0) { \
b = *pSrc << compRealOffset; \
/* .. end pixel is double byte src */ \
if(endPixels > realOffset) \
b |= *(pSrc + 1) >> realOffset; \
} \
else \
b = *pSrc; \
\
/* combine dest and src */ \
WriteByte4; \
} \
pScan += scan; \
pSrcScan += srcScan; \
} \
} while(0)
#define RawMaskBlit(WriteByte1, WriteByte2, WriteByte3, WriteByte4) \
do { \
/* dest and src */ \
ZXData pScan, pSrcScan, pMaskScan, pScanEnd; \
ZXData p, pSrc, pMask; \
unsigned char b, m; \
int scan, srcScan; \
/* offsets, flags, etc */ \
int offset, srcOffset, endPixels; \
int fullBytes, endLine; \
int compRealOffset, realOffset; \
int isRegular; \
\
/* calculate the sizes of scan lines */ \
scan = BitmapScanSize(bitmap); \
srcScan = BitmapScanSize(src); \
\
/* get pointers to a byte corresponding to a pixel */ \
pScan = BitmapPixelPtr(bitmap, x, y); \
pSrcScan = BitmapPixelPtr(src, srcX, srcY); \
pMaskScan = PixelPtrData(maskData, srcScan, srcX, srcY); \
/* calculating end vertical line */ \
endLine = y + srcHeight; \
\
/* bitmap offset */ \
offset = x % 8; \
/* src offset */ \
srcOffset = srcX % 8; \
\
/* get information about how much pixels should be shifted, */ \
/* important: when (offset < srcOffset) one byte is completely absorbed when outputting the left byte */ \
if(offset >= srcOffset) \
realOffset = offset - srcOffset; \
else \
realOffset = 8 - (srcOffset - offset); \
compRealOffset = 8 - realOffset; \
\
/* count of full-size bytes */ \
fullBytes = CalcFullBytes(x, srcWidth); \
/* offset end pixel */ \
endPixels = (x + srcWidth) % 8; \
/* regular draw or not */ \
/* a) snap to right colum */ \
/* b) snap to left colum */ \
isRegular = (offset + srcWidth >= 8) || (offset == 0); \
\
/* main loop y */ \
for(; y < endLine; y++) { \
p = pScan; \
pSrc = pSrcScan; \
pMask = pMaskScan; \
\
/* take care of left byte */ \
/* xxxxxxxx XXXXXXXX xxxxxxxx */ \
/* ^ we here */ \
if(offset != 0) { \
if (offset >= srcOffset) { \
b = *pSrc >> realOffset; \
m = *pMask >> realOffset; \
\
/* need next byte if we haven't real offset */ \
if(realOffset == 0) { \
pSrc++; \
pMask++; \
} \
} \
else { \
b = (*pSrc << compRealOffset) | \
(*(pSrc + 1) >> realOffset); \
m = (*pMask << compRealOffset) | \
(*(pMask + 1) >> realOffset); \
/* we completely used a byte, take a new */ \
pSrc++; \
pMask++; \
} \
\
/* combine dest and src */ \
if(isRegular) { \
WriteByte1; \
*p = (*p & ~m) | (b & m); \
} \
else { \
WriteByte2; \
*p = (*p & ~m) | (b & m); \
} \
\
p++; \
} \
\
/* main loop x */ \
/* xxxxxxxx XXXXXXXX xxxxxxxx */ \
/* ^ we here */ \
pScanEnd = p + fullBytes; \
if(realOffset != 0) { \
for(; p < pScanEnd; p++) { \
b = (*pSrc << compRealOffset) | \
(*(pSrc + 1) >> realOffset); \
m = (*pMask << compRealOffset) | \
(*(pMask + 1) >> realOffset); \
\
/* combine dest and src */ \
WriteByte3; \
*p = (*p & (~m)) | (b & m); \
\
pSrc++; \
pMask++; \
} \
} \
else { \
for(; p < pScanEnd; p++) { \
b = *pSrc; \
m = *pMask; \
\
/* combine dest and src */ \
WriteByte3; \
*p = (*p & (~m)) | (b & m); \
\
pSrc++; \
pMask++; \
} \
} \
\
/* take care of right byte */ \
/* xxxxxxxx XXXXXXXX xxxxxxxx */ \
/* ^ we here */ \
if(isRegular && endPixels) { \
if(realOffset != 0) { \
b = *pSrc << compRealOffset; \
m = *pMask << compRealOffset; \
/* .. end pixel is double byte src */ \
if(endPixels > realOffset) { \
b |= *(pSrc + 1) >> realOffset; \
m |= *(pMask + 1) >> realOffset; \
} \
} \
else { \
b = *pSrc; \
m = *pMask; \
} \
\
/* combine dest and src */ \
WriteByte4; \
*p = (*p & (~m)) | (b & m); \
} \
pScan += scan; \
pSrcScan += srcScan; \
pMaskScan += srcScan; \
} \
} while(0)