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/*====================================================================*
- Copyright (C) 2001 Leptonica. All rights reserved.
- This software is distributed in the hope that it will be
- useful, but with NO WARRANTY OF ANY KIND.
- No author or distributor accepts responsibility to anyone for the
- consequences of using this software, or for whether it serves any
- particular purpose or works at all, unless he or she says so in
- writing. Everyone is granted permission to copy, modify and
- redistribute this source code, for commercial or non-commercial
- purposes, with the following restrictions: (1) the origin of this
- source code must not be misrepresented; (2) modified versions must
- be plainly marked as such; and (3) this notice may not be removed
- or altered from any source or modified source distribution.
*====================================================================*/
/*
* scale_reg.c
*
* This tests a number of scaling operations, through the pixScale()
* interface.
*/
#include <stdio.h>
#include <stdlib.h>
#include "allheaders.h"
static char *image[9] = {"feyn.tif", /* 1 bpp */
"weasel2.png", /* 2 bpp; no cmap */
"weasel2.4c.png", /* 2 bpp; cmap */
"weasel4.png", /* 4 bpp; no cmap */
"weasel4.16c.png", /* 4 bpp; cmap */
"weasel8.png", /* 8 bpp; no cmap */
"weasel8.240c.png", /* 8 bpp; cmap */
"marge.jpg", /* 32 bpp rgb */
"test24.jpg"}; /* 32 bpp rgb */
static const l_int32 SPACE = 30;
static const l_int32 WIDTH = 300;
static const l_float32 FACTOR[5] = {2.3, 1.5, 1.1, 0.6, 0.3};
static void PixSave32(PIXA *pixa, PIX *pixc);
static void AddScaledImages(PIXA *pixa, char *fname, l_int32 width);
main(int argc,
char **argv)
{
l_int32 i;
PIX *pixs, *pixc, *pixd;
PIXA *pixa;
static char mainName[] = "scale_reg";
if (argc != 1)
exit(ERROR_INT(" Syntax: scale_reg", mainName, 1));
pixa = pixaCreate(0);
/* Test 1 bpp */
pixs = pixRead(image[0]);
pixc = pixScale(pixs, 0.32, 0.32);
pixSaveTiled(pixc, pixa, 1, 1, SPACE, 32);
pixDestroy(&pixc);
pixc = pixScaleToGray3(pixs);
PixSave32(pixa, pixc);
pixc = pixScaleToGray4(pixs);
pixSaveTiled(pixc, pixa, 1, 1, SPACE, 32);
pixDestroy(&pixc);
pixc = pixScaleToGray6(pixs);
PixSave32(pixa, pixc);
pixc = pixScaleToGray8(pixs);
PixSave32(pixa, pixc);
pixc = pixScaleToGray16(pixs);
PixSave32(pixa, pixc);
pixDestroy(&pixs);
for (i = 1; i < 9; i++) {
/* if (i != 2) continue; */
AddScaledImages(pixa, image[i], WIDTH);
}
/* Test 2 bpp without colormap */
pixs = pixRead(image[1]);
pixSaveTiled(pixs, pixa, 1, 1, SPACE, 32);
pixc = pixScale(pixs, 2.25, 2.25);
PixSave32(pixa, pixc);
pixc = pixScale(pixs, 0.85, 0.85);
PixSave32(pixa, pixc);
pixc = pixScale(pixs, 0.65, 0.65);
PixSave32(pixa, pixc);
pixDestroy(&pixs);
/* Test 2 bpp with colormap */
pixs = pixRead(image[2]);
pixSaveTiled(pixs, pixa, 1, 1, SPACE, 32);
pixc = pixScale(pixs, 2.25, 2.25);
PixSave32(pixa, pixc);
pixc = pixScale(pixs, 0.85, 0.85);
PixSave32(pixa, pixc);
pixc = pixScale(pixs, 0.65, 0.65);
PixSave32(pixa, pixc);
pixDestroy(&pixs);
/* Test 4 bpp without colormap */
pixs = pixRead(image[3]);
pixSaveTiled(pixs, pixa, 1, 1, SPACE, 32);
pixc = pixScale(pixs, 1.72, 1.72);
PixSave32(pixa, pixc);
pixc = pixScale(pixs, 0.85, 0.85);
PixSave32(pixa, pixc);
pixc = pixScale(pixs, 0.65, 0.65);
PixSave32(pixa, pixc);
pixDestroy(&pixs);
/* Test 4 bpp with colormap */
pixs = pixRead(image[4]);
pixSaveTiled(pixs, pixa, 1, 1, SPACE, 32);
pixc = pixScale(pixs, 1.72, 1.72);
PixSave32(pixa, pixc);
pixc = pixScale(pixs, 0.85, 0.85);
PixSave32(pixa, pixc);
pixc = pixScale(pixs, 0.65, 0.65);
PixSave32(pixa, pixc);
pixDestroy(&pixs);
/* Test 8 bpp without colormap */
pixs = pixRead(image[5]);
pixSaveTiled(pixs, pixa, 1, 1, SPACE, 32);
pixc = pixScale(pixs, 1.92, 1.92);
PixSave32(pixa, pixc);
pixc = pixScale(pixs, 0.85, 0.85);
PixSave32(pixa, pixc);
pixc = pixScale(pixs, 0.65, 0.65);
PixSave32(pixa, pixc);
pixDestroy(&pixs);
/* Test 8 bpp with colormap */
pixs = pixRead(image[6]);
pixSaveTiled(pixs, pixa, 1, 1, SPACE, 32);
pixc = pixScale(pixs, 1.92, 1.92);
PixSave32(pixa, pixc);
pixc = pixScale(pixs, 0.85, 0.85);
PixSave32(pixa, pixc);
pixc = pixScale(pixs, 0.65, 0.65);
PixSave32(pixa, pixc);
pixDestroy(&pixs);
/* Test 32 bpp */
pixs = pixRead(image[7]);
pixSaveTiled(pixs, pixa, 1, 1, SPACE, 32);
pixc = pixScale(pixs, 1.42, 1.42);
PixSave32(pixa, pixc);
pixc = pixScale(pixs, 0.85, 0.85);
PixSave32(pixa, pixc);
pixc = pixScale(pixs, 0.65, 0.65);
PixSave32(pixa, pixc);
pixDestroy(&pixs);
pixd = pixaDisplay(pixa, 0, 0);
pixDisplay(pixd, 100, 100);
pixWrite("junkscale.jpg", pixd, IFF_JFIF_JPEG);
pixDestroy(&pixd);
pixaDestroy(&pixa);
return 0;
}
static void
AddScaledImages(PIXA *pixa,
char *fname,
l_int32 width)
{
l_int32 i, w;
l_float32 scalefactor;
PIX *pixs, *pixt1, *pixt2, *pix32;
pixs = pixRead(fname);
w = pixGetWidth(pixs);
for (i = 0; i < 5; i++) {
scalefactor = (l_float32)width / (FACTOR[i] * (l_float32)w);
pixt1 = pixScale(pixs, FACTOR[i], FACTOR[i]);
pixt2 = pixScale(pixt1, scalefactor, scalefactor);
pix32 = pixConvertTo32(pixt2);
if (i == 0)
pixSaveTiled(pix32, pixa, 1, 1, SPACE, 0);
else
pixSaveTiled(pix32, pixa, 1, 0, SPACE, 0);
pixDestroy(&pixt1);
pixDestroy(&pixt2);
pixDestroy(&pix32);
}
pixDestroy(&pixs);
return;
}
static void
PixSave32(PIXA *pixa, PIX *pixc)
{
PIX *pix32;
pix32 = pixConvertTo32(pixc);
pixSaveTiled(pix32, pixa, 1, 0, SPACE, 0);
pixDestroy(&pixc);
pixDestroy(&pix32);
}
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