mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-12-28 02:46:18 +03:00
166 lines
4.0 KiB
C
166 lines
4.0 KiB
C
/*
|
|
* The Python Imaging Library
|
|
* $Id$
|
|
*
|
|
* basic channel operations
|
|
*
|
|
* history:
|
|
* 1996-03-28 fl Created
|
|
* 1996-08-13 fl Added and/or/xor for "1" images
|
|
* 1996-12-14 fl Added add_modulo, sub_modulo
|
|
* 2005-09-10 fl Fixed output values from and/or/xor
|
|
*
|
|
* Copyright (c) 1996 by Fredrik Lundh.
|
|
* Copyright (c) 1997 by Secret Labs AB.
|
|
*
|
|
* See the README file for details on usage and redistribution.
|
|
*/
|
|
|
|
|
|
#include "Imaging.h"
|
|
|
|
#define CHOP(operation, mode)\
|
|
int x, y;\
|
|
Imaging imOut;\
|
|
imOut = create(imIn1, imIn2, mode);\
|
|
if (!imOut)\
|
|
return NULL;\
|
|
for (y = 0; y < imOut->ysize; y++) {\
|
|
UINT8* out = (UINT8*) imOut->image[y];\
|
|
UINT8* in1 = (UINT8*) imIn1->image[y];\
|
|
UINT8* in2 = (UINT8*) imIn2->image[y];\
|
|
for (x = 0; x < imOut->linesize; x++) {\
|
|
int temp = operation;\
|
|
if (temp <= 0)\
|
|
out[x] = 0;\
|
|
else if (temp >= 255)\
|
|
out[x] = 255;\
|
|
else\
|
|
out[x] = temp;\
|
|
}\
|
|
}\
|
|
return imOut;
|
|
|
|
#define CHOP2(operation, mode)\
|
|
int x, y;\
|
|
Imaging imOut;\
|
|
imOut = create(imIn1, imIn2, mode);\
|
|
if (!imOut)\
|
|
return NULL;\
|
|
for (y = 0; y < imOut->ysize; y++) {\
|
|
UINT8* out = (UINT8*) imOut->image[y];\
|
|
UINT8* in1 = (UINT8*) imIn1->image[y];\
|
|
UINT8* in2 = (UINT8*) imIn2->image[y];\
|
|
for (x = 0; x < imOut->linesize; x++) {\
|
|
out[x] = operation;\
|
|
}\
|
|
}\
|
|
return imOut;
|
|
|
|
static Imaging
|
|
create(Imaging im1, Imaging im2, char* mode)
|
|
{
|
|
int xsize, ysize;
|
|
|
|
if (!im1 || !im2 || im1->type != IMAGING_TYPE_UINT8 ||
|
|
(mode != NULL && (strcmp(im1->mode, "1") || strcmp(im2->mode, "1"))))
|
|
return (Imaging) ImagingError_ModeError();
|
|
if (im1->type != im2->type ||
|
|
im1->bands != im2->bands)
|
|
return (Imaging) ImagingError_Mismatch();
|
|
|
|
xsize = (im1->xsize < im2->xsize) ? im1->xsize : im2->xsize;
|
|
ysize = (im1->ysize < im2->ysize) ? im1->ysize : im2->ysize;
|
|
|
|
return ImagingNewDirty(im1->mode, xsize, ysize);
|
|
}
|
|
|
|
Imaging
|
|
ImagingChopLighter(Imaging imIn1, Imaging imIn2)
|
|
{
|
|
CHOP((in1[x] > in2[x]) ? in1[x] : in2[x], NULL);
|
|
}
|
|
|
|
Imaging
|
|
ImagingChopDarker(Imaging imIn1, Imaging imIn2)
|
|
{
|
|
CHOP((in1[x] < in2[x]) ? in1[x] : in2[x], NULL);
|
|
}
|
|
|
|
Imaging
|
|
ImagingChopDifference(Imaging imIn1, Imaging imIn2)
|
|
{
|
|
CHOP(abs((int) in1[x] - (int) in2[x]), NULL);
|
|
}
|
|
|
|
Imaging
|
|
ImagingChopMultiply(Imaging imIn1, Imaging imIn2)
|
|
{
|
|
CHOP((int) in1[x] * (int) in2[x] / 255, NULL);
|
|
}
|
|
|
|
Imaging
|
|
ImagingChopScreen(Imaging imIn1, Imaging imIn2)
|
|
{
|
|
CHOP(255 - ((int) (255 - in1[x]) * (int) (255 - in2[x])) / 255, NULL);
|
|
}
|
|
|
|
Imaging
|
|
ImagingChopAdd(Imaging imIn1, Imaging imIn2, float scale, int offset)
|
|
{
|
|
CHOP(((int) in1[x] + (int) in2[x]) / scale + offset, NULL);
|
|
}
|
|
|
|
Imaging
|
|
ImagingChopSubtract(Imaging imIn1, Imaging imIn2, float scale, int offset)
|
|
{
|
|
CHOP(((int) in1[x] - (int) in2[x]) / scale + offset, NULL);
|
|
}
|
|
|
|
Imaging
|
|
ImagingChopAnd(Imaging imIn1, Imaging imIn2)
|
|
{
|
|
CHOP2((in1[x] && in2[x]) ? 255 : 0, "1");
|
|
}
|
|
|
|
Imaging
|
|
ImagingChopOr(Imaging imIn1, Imaging imIn2)
|
|
{
|
|
CHOP2((in1[x] || in2[x]) ? 255 : 0, "1");
|
|
}
|
|
|
|
Imaging
|
|
ImagingChopXor(Imaging imIn1, Imaging imIn2)
|
|
{
|
|
CHOP2(((in1[x] != 0) ^ (in2[x] != 0)) ? 255 : 0, "1");
|
|
}
|
|
|
|
Imaging
|
|
ImagingChopAddModulo(Imaging imIn1, Imaging imIn2)
|
|
{
|
|
CHOP2(in1[x] + in2[x], NULL);
|
|
}
|
|
|
|
Imaging
|
|
ImagingChopSubtractModulo(Imaging imIn1, Imaging imIn2)
|
|
{
|
|
CHOP2(in1[x] - in2[x], NULL);
|
|
}
|
|
|
|
Imaging
|
|
ImagingChopSoftLight(Imaging imIn1, Imaging imIn2)
|
|
{
|
|
// CHOP2( ( ( (255-in1[x]) * (in1[x]*in2[x]) ) / 65536) +
|
|
// ((in1[x] * (255 - ((255 - in1[1]) * (255 - in2[x]) / 255 ) )) / 255), NULL );
|
|
CHOP2( (((255-in1[x]) * (in1[x]*in2[x]) ) / 65536) +
|
|
(in1[x] * ( 255 - ( (255 - in1[x]) * (255 - in2[x] ) / 255) )) / 255
|
|
, NULL );
|
|
}
|
|
|
|
Imaging
|
|
ImagingChopHardLight(Imaging imIn1, Imaging imIn2)
|
|
{
|
|
CHOP2( (in2[x]<128) ? ( (in1[x]*in2[x])/127)
|
|
: 255 - ( ((255-in2[x]) * (255-in1[x])) / 127)
|
|
, NULL);
|
|
} |