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Add new fast ImagingTranspose function

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This commit is contained in:
homm 2014-10-25 04:12:24 +04:00
parent 9634e437ef
commit 0c90ce2504
2 changed files with 39 additions and 0 deletions
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38
libImaging/Geometry.c
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@ -127,6 +127,44 @@ ImagingRotate90(Imaging imOut, Imaging imIn)
} }
Imaging
ImagingTranspose(Imaging imOut, Imaging imIn)
{
ImagingSectionCookie cookie;
int x, y, xx, yy, xxsize, yysize;
int size = 64;
if (!imOut || !imIn || strcmp(imIn->mode, imOut->mode) != 0)
return (Imaging) ImagingError_ModeError();
if (imIn->xsize != imOut->ysize || imIn->ysize != imOut->xsize)
return (Imaging) ImagingError_Mismatch();
#define TRANSPOSE(image) \
for (y = 0; y < imIn->ysize; y += size) { \
for (x = 0; x < imIn->xsize; x += size) { \
yysize = size < (imIn->ysize - y) ? size : (imIn->ysize - y); \
xxsize = size < (imIn->xsize - x) ? size : (imIn->xsize - x); \
for (yy = 0; yy < yysize; yy++) { \
for (xx = 0; xx < xxsize; xx++) { \
imOut->image[x + xx][y + yy] = imIn->image[y + yy][x + xx]; \
} \
} \
} \
}
ImagingCopyInfo(imOut, imIn);
ImagingSectionEnter(&cookie);
if (imIn->image8)
TRANSPOSE(image8)
else
TRANSPOSE(image32)
ImagingSectionLeave(&cookie);
return imOut;
}
Imaging Imaging
ImagingRotate180(Imaging imOut, Imaging imIn) ImagingRotate180(Imaging imOut, Imaging imIn)
{ {

1
libImaging/Imaging.h
View File

@ -292,6 +292,7 @@ extern Imaging ImagingRotate90(Imaging imOut, Imaging imIn);
extern Imaging ImagingRotate180(Imaging imOut, Imaging imIn); extern Imaging ImagingRotate180(Imaging imOut, Imaging imIn);
extern Imaging ImagingRotate270(Imaging imOut, Imaging imIn); extern Imaging ImagingRotate270(Imaging imOut, Imaging imIn);
extern Imaging ImagingStretch(Imaging imOut, Imaging imIn, int filter); extern Imaging ImagingStretch(Imaging imOut, Imaging imIn, int filter);
extern Imaging ImagingTranspose(Imaging imOut, Imaging imIn);
extern Imaging ImagingTransformPerspective( extern Imaging ImagingTransformPerspective(
Imaging imOut, Imaging imIn, int x0, int y0, int x1, int y1, Imaging imOut, Imaging imIn, int x0, int y0, int x1, int y1,
double a[8], int filter, int fill); double a[8], int filter, int fill);