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contrib/python/Pillow/py2/libImaging/Matrix.c
74 строки
2 KB
Anton Myagkov
Update ydb version to 24.4 (#4579)
07 фев 2026, 11:59
Не верифицирован
07 фев 2026, 11:59
2c21cae
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/* * The Python Imaging Library * $Id$ * * colour and luminance matrix transforms * * history: * 1996-05-18 fl: created (brute force implementation) * * Copyright (c) Fredrik Lundh 1996. * Copyright (c) Secret Labs AB 1997. * * See the README file for information on usage and redistribution. */ #include "Imaging.h" #define CLIPF(v) ((v <= 0.0) ? 0 : (v >= 255.0F) ? 255 : (UINT8) v) Imaging ImagingConvertMatrix(Imaging im, const char *mode, float m[]) { Imaging imOut; int x, y; /* Assume there's enough data in the buffer */ if (!im) return (Imaging) ImagingError_ModeError(); if (strcmp(mode, "L") == 0 && im->bands == 3) { imOut = ImagingNewDirty("L", im->xsize, im->ysize); if (!imOut) return NULL; for (y = 0; y < im->ysize; y++) { UINT8* in = (UINT8*) im->image[y]; UINT8* out = (UINT8*) imOut->image[y]; for (x = 0; x < im->xsize; x++) { float v = m[0]*in[0] + m[1]*in[1] + m[2]*in[2] + m[3] + 0.5; out[x] = CLIPF(v); in += 4; } } } else if (strlen(mode) == 3 && im->bands == 3) { imOut = ImagingNewDirty(mode, im->xsize, im->ysize); if (!imOut) return NULL; for (y = 0; y < im->ysize; y++) { UINT8* in = (UINT8*) im->image[y]; UINT8* out = (UINT8*) imOut->image[y]; for (x = 0; x < im->xsize; x++) { float v0 = m[0]*in[0] + m[1]*in[1] + m[2]*in[2] + m[3] + 0.5; float v1 = m[4]*in[0] + m[5]*in[1] + m[6]*in[2] + m[7] + 0.5; float v2 = m[8]*in[0] + m[9]*in[1] + m[10]*in[2] + m[11] + 0.5; out[0] = CLIPF(v0); out[1] = CLIPF(v1); out[2] = CLIPF(v2); in += 4; out += 4; } } } else return (Imaging) ImagingError_ModeError(); return imOut; }