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//------------------------------------------------------------------------
// SAVE JPEG Program
//------------------------------------------------------------------------
//
// (C) 2001-2002 Andrew Apted
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// 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 General Public License for more details.
//
//------------------------------------------------------------------------
using namespace std;
#include "z_config.h"
#include "z_args.h"
#include "z_string.h"
#include "t_colmap.h"
#include "t_hue.h"
#include "t_tiles.h"
extern "C"
{
#include "jpeglib.h"
}
#define QUALITY 90
static Tileset *set;
static int save_jpeg_file(const char *filename,
const unsigned char *pixels, int image_w, int image_h)
{
FILE *fp;
fp = fopen(filename, "wb");
if (! fp)
return 0;
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
JSAMPROW row_pointer[1];
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
jpeg_stdio_dest(&cinfo, fp);
cinfo.image_width = image_w;
cinfo.image_height = image_h;
cinfo.input_components = 3;
cinfo.in_color_space = JCS_RGB;
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, QUALITY, TRUE);
jpeg_start_compress(&cinfo, TRUE);
while (cinfo.next_scanline < cinfo.image_height)
{
row_pointer[0] = (JSAMPROW) (pixels +
(cinfo.next_scanline * image_w * 3));
(void) jpeg_write_scanlines(&cinfo, row_pointer, 1);
}
jpeg_finish_compress(&cinfo);
fclose(fp);
return 1;
}
static void InstallTile(unsigned char *rgba, int width, int height,
int bx, int by, Tileset *set, Tile *tile)
{
int x, y;
ASSERT(bx >= 0 && bx < width);
ASSERT(by >= 0 && by < height);
ASSERT(tile->pixels);
for (y=0; y < tile->height; y++)
for (x=0; x < tile->width; x++)
{
Pix_t pix = tile->pixels[y*tile->width + x];
const PackCol& col = set->cmap->At(pix);
unsigned char *dst = rgba + (by + y) * width * 3 + (bx + x) * 3;
dst[0] = col.r;
dst[1] = col.g;
dst[2] = col.b;
}
}
static void InstallSet(unsigned char *rgba, int width, int height,
int across, int down, Tileset *set, int& pos)
{
int i;
for (i=0; i < set->total; i++, pos++)
{
int bx = (pos % across) * set->tile_w;
int by = (pos / across) * set->tile_h;
InstallTile(rgba, width, height, bx, by, set, set->tiles + i);
}
}
static void SaveAsJPEG(const char *filename, int across, int down)
{
int width = across * set->tile_w;
int height = down * set->tile_h;
unsigned char *rgba = new unsigned char [width * height * 3];
memset(rgba, 0, width * height * 3);
int pos = 0;
InstallSet(rgba, width, height, across, down, set, pos);
fprintf(stderr, "Saving %s...\n", filename);
save_jpeg_file(filename, rgba, width, height);
fprintf(stderr, "\n");
delete[] rgba;
}
//------------------------------------------------------------------------
static int integer_sqrt(int val)
{
int i = 0;
while (i * i < val)
i++;
return i;
}
static void ShowInfo()
{
fprintf(stdout,
"\n**** SaveJPEG 0.3 ****\n\n"
"Copyright (C) 2001-2002 Andrew Apted.\n"
"Under the GNU General Public License (GPL).\n\n"
"USAGE: savejpeg input.txt output.jpg\n\n"
);
fflush(stdout);
}
int main(int argc, const char **argv, const char **envp)
{
if (argc > 1 &&
(Z_String::CaseCmp(argv[1], "/?") == 0 ||
Z_String::CaseCmp(argv[1], "-h") == 0 ||
Z_String::CaseCmp(argv[1], "-help") == 0 ||
Z_String::CaseCmp(argv[1], "--help") == 0))
{
ShowInfo();
exit(0);
}
if (argc != 3)
{
fprintf(stderr, "USAGE: savejpeg input.txt output.jpg\n");
exit(2);
}
set = Tileset::Load(Filename(argv[1]));
int num_across = integer_sqrt(set->total);
int num_down = (set->total + num_across - 1) / num_across;
SaveAsJPEG(argv[2], num_across, num_down);
return 0;
}
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