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102 lines
2.2 KiB
C
102 lines
2.2 KiB
C
/*
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* The Python Imaging Library
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* $Id$
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*
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* fill image with constant pixel value
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*
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* history:
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* 95-11-26 fl moved from Imaging.c
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* 96-05-17 fl added radial fill, renamed wedge to linear
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* 98-06-23 fl changed ImageFill signature
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*
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* Copyright (c) Secret Labs AB 1997-98. All rights reserved.
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* Copyright (c) Fredrik Lundh 1995-96.
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*
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* See the README file for information on usage and redistribution.
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*/
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#include "Imaging.h"
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#include "math.h"
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Imaging
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ImagingFill(Imaging im, const void* colour)
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{
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int x, y;
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if (im->type == IMAGING_TYPE_SPECIAL) {
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/* use generic API */
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ImagingAccess access = ImagingAccessNew(im);
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if (access) {
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for (y = 0; y < im->ysize; y++)
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for (x = 0; x < im->xsize; x++)
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access->put_pixel(im, x, y, colour);
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ImagingAccessDelete(im, access);
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} else {
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/* wipe the image */
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for (y = 0; y < im->ysize; y++)
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memset(im->image[y], 0, im->linesize);
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}
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} else {
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INT32 c = 0L;
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memcpy(&c, colour, im->pixelsize);
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if (im->image32 && c != 0L) {
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for (y = 0; y < im->ysize; y++)
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for (x = 0; x < im->xsize; x++)
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im->image32[y][x] = c;
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} else {
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unsigned char cc = (unsigned char) *(UINT8*) colour;
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for (y = 0; y < im->ysize; y++)
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memset(im->image[y], cc, im->linesize);
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}
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}
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return im;
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}
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Imaging
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ImagingFillLinearGradient(const char *mode)
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{
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Imaging im;
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int y;
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if (strlen(mode) != 1)
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return (Imaging) ImagingError_ModeError();
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im = ImagingNew(mode, 256, 256);
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if (!im)
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return NULL;
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for (y = 0; y < 256; y++)
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memset(im->image8[y], (unsigned char) y, 256);
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return im;
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}
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Imaging
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ImagingFillRadialGradient(const char *mode)
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{
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Imaging im;
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int x, y;
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int d;
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if (strlen(mode) != 1)
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return (Imaging) ImagingError_ModeError();
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im = ImagingNew(mode, 256, 256);
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if (!im)
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return NULL;
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for (y = 0; y < 256; y++)
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for (x = 0; x < 256; x++) {
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d = (int) sqrt((double) ((x-128)*(x-128) + (y-128)*(y-128)) * 2.0);
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if (d >= 255)
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im->image8[y][x] = 255;
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else
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im->image8[y][x] = d;
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}
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return im;
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}
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