/*
* Copyright (C) 2010 Cameron Zemek ( grom@zeminvaders.net)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <unistd.h>
#include <stdint.h>
#include <stdlib.h>
#include <hqx.h>
#include <IL/il.h>
static inline uint32_t swapByteOrder(uint32_t ui)
{
return (ui >> 24) | ((ui << 8) & 0x00FF0000) | ((ui >> 8) & 0x0000FF00) | (ui << 24);
}
int main(int argc, char *argv[])
{
int opt;
int scaleBy = 4;
while ((opt = getopt(argc, argv, "s:")) != -1) {
switch (opt) {
case 's':
if (scaleBy != 2 && scaleBy != 3 && scaleBy != 4) {
fprintf(stderr
, "Only scale factors of 2, 3, and 4 are supported.");
return 1;
}
break;
default:
goto error_usage;
}
}
if (optind + 2 > argc) {
error_usage:
fprintf(stderr
, "Usage: %s [-s scaleBy] input output\n", argv
[0]);
return 1;
}
ILuint handle, width, height;
char *szFilenameIn = argv[optind];
char *szFilenameOut = argv[optind + 1];
ilInit();
ilEnable(IL_ORIGIN_SET);
ilGenImages(1, &handle);
ilBindImage(handle);
// Load image
ILboolean loaded = ilLoadImage(szFilenameIn);
if (loaded == IL_FALSE) {
fprintf(stderr
, "ERROR: can't load '%s'\n", szFilenameIn
);
return 1;
}
width = ilGetInteger(IL_IMAGE_WIDTH);
height = ilGetInteger(IL_IMAGE_HEIGHT);
// Allocate memory for image data
size_t srcSize = width * height * sizeof(uint32_t);
uint8_t *srcData
= (uint8_t *) malloc(srcSize
);
size_t destSize = width * scaleBy * height * scaleBy * sizeof(uint32_t);
uint8_t *destData
= (uint8_t *) malloc(destSize
);
// Init srcData from loaded image
// We want the pixels in BGRA format so that when converting to uint32_t
// we get a RGB value due to little-endianness.
ilCopyPixels(0, 0, 0, width, height, 1, IL_BGRA, IL_UNSIGNED_BYTE, srcData);
uint32_t *sp = (uint32_t *) srcData;
uint32_t *dp = (uint32_t *) destData;
// If big endian we have to swap the byte order to get RGB values
#ifdef WORDS_BIGENDIAN
uint32_t *spTemp = sp;
for (i = 0; i < srcSize >> 2; i++) {
spTemp[i] = swapByteOrder(spTemp[i]);
}
#endif
hqxInit();
switch (scaleBy) {
case 2:
hq2x_32(sp, dp, width, height);
break;
case 3:
hq3x_32(sp, dp, width, height);
break;
case 4:
default:
hq4x_32(sp, dp, width, height);
break;
}
// If big endian we have to swap byte order of destData to get BGRA format
#ifdef WORDS_BIGENDIAN
uint32_t *dpTemp = dp;
for (i = 0; i < destSize >> 2; i++) {
dpTemp[i] = swapByteOrder(dpTemp[i]);
}
#endif
// Copy destData into image
ilTexImage(width * scaleBy, height * scaleBy, 0, 4, IL_BGRA, IL_UNSIGNED_BYTE, destData);
// Free image data
// Save image
ilConvertImage(IL_BGRA, IL_UNSIGNED_BYTE); // No alpha channel
ilHint(IL_COMPRESSION_HINT, IL_USE_COMPRESSION);
ilEnable(IL_FILE_OVERWRITE);
ILboolean saved = ilSaveImage(szFilenameOut);
ilDeleteImages(1, &handle);
if (saved == IL_FALSE) {
fprintf(stderr
, "ERROR: can't save '%s'\n", szFilenameOut
);
return 1;
}
return 0;
}