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convert.c
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convert.c
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/*
* The copyright in this software is being made available under the 2-clauses
* BSD License, included below. This software may be subject to other third
* party and contributor rights, including patent rights, and no such rights
* are granted under this license.
*
* Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
* Copyright (c) 2002-2014, Professor Benoit Macq
* Copyright (c) 2001-2003, David Janssens
* Copyright (c) 2002-2003, Yannick Verschueren
* Copyright (c) 2003-2007, Francois-Olivier Devaux
* Copyright (c) 2003-2014, Antonin Descampe
* Copyright (c) 2005, Herve Drolon, FreeImage Team
* Copyright (c) 2006-2007, Parvatha Elangovan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "opj_apps_config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#ifdef OPJ_HAVE_LIBTIFF
#include <tiffio.h>
#endif /* OPJ_HAVE_LIBTIFF */
#ifdef OPJ_HAVE_LIBPNG
#include <zlib.h>
#include <png.h>
#endif /* OPJ_HAVE_LIBPNG */
#include "openjpeg.h"
#include "convert.h"
/*
* Get logarithm of an integer and round downwards.
*
* log2(a)
*/
static int int_floorlog2(int a)
{
int l;
for (l = 0; a > 1; l++) {
a >>= 1;
}
return l;
}
/* -->> -->> -->> -->>
TGA IMAGE FORMAT
<<-- <<-- <<-- <<-- */
#ifdef INFORMATION_ONLY
/* TGA header definition. */
struct tga_header {
unsigned char id_length; /* Image id field length */
unsigned char colour_map_type; /* Colour map type */
unsigned char image_type; /* Image type */
/*
** Colour map specification
*/
unsigned short colour_map_index; /* First entry index */
unsigned short colour_map_length; /* Colour map length */
unsigned char colour_map_entry_size; /* Colour map entry size */
/*
** Image specification
*/
unsigned short x_origin; /* x origin of image */
unsigned short y_origin; /* u origin of image */
unsigned short image_width; /* Image width */
unsigned short image_height; /* Image height */
unsigned char pixel_depth; /* Pixel depth */
unsigned char image_desc; /* Image descriptor */
};
#endif /* INFORMATION_ONLY */
static unsigned short get_ushort(unsigned short val)
{
#ifdef OPJ_BIG_ENDIAN
return (((val & 0xff) << 8) + (val >> 8));
#else
return (val);
#endif
}
#define TGA_HEADER_SIZE 18
static int tga_readheader(FILE *fp, unsigned int *bits_per_pixel,
unsigned int *width, unsigned int *height, int *flip_image)
{
int palette_size;
unsigned char *tga ;
unsigned char id_len, cmap_type, image_type;
unsigned char pixel_depth, image_desc;
unsigned short cmap_index, cmap_len, cmap_entry_size;
unsigned short x_origin, y_origin, image_w, image_h;
if (!bits_per_pixel || !width || !height || !flip_image) {
return 0;
}
tga = (unsigned char*)malloc(18);
if (fread(tga, TGA_HEADER_SIZE, 1, fp) != 1) {
fprintf(stderr,
"\nError: fread return a number of element different from the expected.\n");
free(tga);
return 0 ;
}
id_len = (unsigned char)tga[0];
cmap_type = (unsigned char)tga[1];
image_type = (unsigned char)tga[2];
cmap_index = get_ushort(*(unsigned short*)(&tga[3]));
cmap_len = get_ushort(*(unsigned short*)(&tga[5]));
cmap_entry_size = (unsigned char)tga[7];
x_origin = get_ushort(*(unsigned short*)(&tga[8]));
y_origin = get_ushort(*(unsigned short*)(&tga[10]));
image_w = get_ushort(*(unsigned short*)(&tga[12]));
image_h = get_ushort(*(unsigned short*)(&tga[14]));
pixel_depth = (unsigned char)tga[16];
image_desc = (unsigned char)tga[17];
free(tga);
*bits_per_pixel = (unsigned int)pixel_depth;
*width = (unsigned int)image_w;
*height = (unsigned int)image_h;
/* Ignore tga identifier, if present ... */
if (id_len) {
unsigned char *id = (unsigned char *) malloc(id_len);
if (!fread(id, id_len, 1, fp)) {
fprintf(stderr,
"\nError: fread return a number of element different from the expected.\n");
free(id);
return 0 ;
}
free(id);
}
/* Test for compressed formats ... not yet supported ...
// Note :- 9 - RLE encoded palettized.
// 10 - RLE encoded RGB. */
if (image_type > 8) {
fprintf(stderr, "Sorry, compressed tga files are not currently supported.\n");
return 0 ;
}
*flip_image = !(image_desc & 32);
/* Palettized formats are not yet supported, skip over the palette, if present ... */
palette_size = cmap_len * (cmap_entry_size / 8);
if (palette_size > 0) {
fprintf(stderr, "File contains a palette - not yet supported.");
fseek(fp, palette_size, SEEK_CUR);
}
return 1;
}
#ifdef OPJ_BIG_ENDIAN
static inline uint16_t swap16(uint16_t x)
{
return (((x & 0x00ffU) << 8) | ((x & 0xff00U) >> 8));
}
#endif
static int tga_writeheader(FILE *fp, int bits_per_pixel, int width, int height,
opj_bool flip_image)
{
unsigned short image_w, image_h, us0;
unsigned char uc0, image_type;
unsigned char pixel_depth, image_desc;
if (!bits_per_pixel || !width || !height) {
return 0;
}
pixel_depth = 0;
if (bits_per_pixel < 256) {
pixel_depth = (unsigned char)bits_per_pixel;
} else {
fprintf(stderr, "ERROR: Wrong bits per pixel inside tga_header");
return 0;
}
uc0 = 0;
if (fwrite(&uc0, 1, 1, fp) != 1) {
goto fails; /* id_length */
}
if (fwrite(&uc0, 1, 1, fp) != 1) {
goto fails; /* colour_map_type */
}
image_type = 2; /* Uncompressed. */
if (fwrite(&image_type, 1, 1, fp) != 1) {
goto fails;
}
us0 = 0;
if (fwrite(&us0, 2, 1, fp) != 1) {
goto fails; /* colour_map_index */
}
if (fwrite(&us0, 2, 1, fp) != 1) {
goto fails; /* colour_map_length */
}
if (fwrite(&uc0, 1, 1, fp) != 1) {
goto fails; /* colour_map_entry_size */
}
if (fwrite(&us0, 2, 1, fp) != 1) {
goto fails; /* x_origin */
}
if (fwrite(&us0, 2, 1, fp) != 1) {
goto fails; /* y_origin */
}
image_w = (unsigned short)width;
image_h = (unsigned short) height;
#ifndef OPJ_BIG_ENDIAN
if (fwrite(&image_w, 2, 1, fp) != 1) {
goto fails;
}
if (fwrite(&image_h, 2, 1, fp) != 1) {
goto fails;
}
#else
image_w = swap16(image_w);
image_h = swap16(image_h);
if (fwrite(&image_w, 2, 1, fp) != 1) {
goto fails;
}
if (fwrite(&image_h, 2, 1, fp) != 1) {
goto fails;
}
#endif
if (fwrite(&pixel_depth, 1, 1, fp) != 1) {
goto fails;
}
image_desc = 8; /* 8 bits per component. */
if (flip_image) {
image_desc |= 32;
}
if (fwrite(&image_desc, 1, 1, fp) != 1) {
goto fails;
}
return 1;
fails:
fputs("\nwrite_tgaheader: write ERROR\n", stderr);
return 0;
}
opj_image_t* tgatoimage(const char *filename, opj_cparameters_t *parameters)
{
FILE *f;
opj_image_t *image;
unsigned int image_width, image_height, pixel_bit_depth;
unsigned int x, y;
int flip_image = 0;
opj_image_cmptparm_t cmptparm[4]; /* maximum 4 components */
int numcomps;
OPJ_COLOR_SPACE color_space;
opj_bool mono ;
opj_bool save_alpha;
int subsampling_dx, subsampling_dy;
int i;
f = fopen(filename, "rb");
if (!f) {
fprintf(stderr, "Failed to open %s for reading !!\n", filename);
return 0;
}
if (!tga_readheader(f, &pixel_bit_depth, &image_width, &image_height,
&flip_image)) {
return NULL;
}
/* We currently only support 24 & 32 bit tga's ... */
if (!((pixel_bit_depth == 24) || (pixel_bit_depth == 32))) {
return NULL;
}
/* initialize image components */
memset(&cmptparm[0], 0, 4 * sizeof(opj_image_cmptparm_t));
mono = (pixel_bit_depth == 8) ||
(pixel_bit_depth == 16); /* Mono with & without alpha. */
save_alpha = (pixel_bit_depth == 16) ||
(pixel_bit_depth == 32); /* Mono with alpha, or RGB with alpha */
if (mono) {
color_space = CLRSPC_GRAY;
numcomps = save_alpha ? 2 : 1;
} else {
numcomps = save_alpha ? 4 : 3;
color_space = CLRSPC_SRGB;
}
subsampling_dx = parameters->subsampling_dx;
subsampling_dy = parameters->subsampling_dy;
for (i = 0; i < numcomps; i++) {
cmptparm[i].prec = 8;
cmptparm[i].bpp = 8;
cmptparm[i].sgnd = 0;
cmptparm[i].dx = subsampling_dx;
cmptparm[i].dy = subsampling_dy;
cmptparm[i].w = image_width;
cmptparm[i].h = image_height;
}
/* create the image */
image = opj_image_create(numcomps, &cmptparm[0], color_space);
if (!image) {
return NULL;
}
/* set image offset and reference grid */
image->x0 = parameters->image_offset_x0;
image->y0 = parameters->image_offset_y0;
image->x1 = !image->x0 ? (image_width - 1) * subsampling_dx + 1 : image->x0 +
(image_width - 1) * subsampling_dx + 1;
image->y1 = !image->y0 ? (image_height - 1) * subsampling_dy + 1 : image->y0 +
(image_height - 1) * subsampling_dy + 1;
/* set image data */
for (y = 0; y < image_height; y++) {
int index;
if (flip_image) {
index = (image_height - y - 1) * image_width;
} else {
index = y * image_width;
}
if (numcomps == 3) {
for (x = 0; x < image_width; x++) {
unsigned char r, g, b;
if (!fread(&b, 1, 1, f)) {
fprintf(stderr,
"\nError: fread return a number of element different from the expected.\n");
opj_image_destroy(image);
return NULL;
}
if (!fread(&g, 1, 1, f)) {
fprintf(stderr,
"\nError: fread return a number of element different from the expected.\n");
opj_image_destroy(image);
return NULL;
}
if (!fread(&r, 1, 1, f)) {
fprintf(stderr,
"\nError: fread return a number of element different from the expected.\n");
opj_image_destroy(image);
return NULL;
}
image->comps[0].data[index] = r;
image->comps[1].data[index] = g;
image->comps[2].data[index] = b;
index++;
}
} else if (numcomps == 4) {
for (x = 0; x < image_width; x++) {
unsigned char r, g, b, a;
if (!fread(&b, 1, 1, f)) {
fprintf(stderr,
"\nError: fread return a number of element different from the expected.\n");
opj_image_destroy(image);
return NULL;
}
if (!fread(&g, 1, 1, f)) {
fprintf(stderr,
"\nError: fread return a number of element different from the expected.\n");
opj_image_destroy(image);
return NULL;
}
if (!fread(&r, 1, 1, f)) {
fprintf(stderr,
"\nError: fread return a number of element different from the expected.\n");
opj_image_destroy(image);
return NULL;
}
if (!fread(&a, 1, 1, f)) {
fprintf(stderr,
"\nError: fread return a number of element different from the expected.\n");
opj_image_destroy(image);
return NULL;
}
image->comps[0].data[index] = r;
image->comps[1].data[index] = g;
image->comps[2].data[index] = b;
image->comps[3].data[index] = a;
index++;
}
} else {
fprintf(stderr, "Currently unsupported bit depth : %s\n", filename);
}
}
return image;
}
int imagetotga(opj_image_t * image, const char *outfile)
{
int width, height, bpp, x, y;
opj_bool write_alpha;
int i, adjustR, adjustG, adjustB;
unsigned int alpha_channel;
float r, g, b, a;
unsigned char value;
float scale;
FILE *fdest;
size_t res;
fdest = fopen(outfile, "wb");
if (!fdest) {
fprintf(stderr, "ERROR -> failed to open %s for writing\n", outfile);
return 1;
}
for (i = 0; i < image->numcomps - 1; i++) {
if ((image->comps[0].dx != image->comps[i + 1].dx)
|| (image->comps[0].dy != image->comps[i + 1].dy)
|| (image->comps[0].prec != image->comps[i + 1].prec)) {
fprintf(stderr,
"Unable to create a tga file with such J2K image charateristics.");
return 1;
}
}
width = image->comps[0].w;
height = image->comps[0].h;
/* Mono with alpha, or RGB with alpha. */
write_alpha = (image->numcomps == 2) || (image->numcomps == 4);
/* Write TGA header */
bpp = write_alpha ? 32 : 24;
if (!tga_writeheader(fdest, bpp, width, height, OPJ_TRUE)) {
return 1;
}
alpha_channel = image->numcomps - 1;
scale = 255.0f / (float)((1 << image->comps[0].prec) - 1);
adjustR = (image->comps[0].sgnd ? 1 << (image->comps[0].prec - 1) : 0);
adjustG = (image->comps[1].sgnd ? 1 << (image->comps[1].prec - 1) : 0);
adjustB = (image->comps[2].sgnd ? 1 << (image->comps[2].prec - 1) : 0);
for (y = 0; y < height; y++) {
unsigned int index = y * width;
for (x = 0; x < width; x++, index++) {
r = (float)(image->comps[0].data[index] + adjustR);
if (image->numcomps > 2) {
g = (float)(image->comps[1].data[index] + adjustG);
b = (float)(image->comps[2].data[index] + adjustB);
} else { /* Greyscale ... */
g = r;
b = r;
}
/* TGA format writes BGR ... */
value = (unsigned char)(b * scale);
res = fwrite(&value, 1, 1, fdest);
if (res < 1) {
fprintf(stderr, "failed to write 1 byte for %s\n", outfile);
return 1;
}
value = (unsigned char)(g * scale);
res = fwrite(&value, 1, 1, fdest);
if (res < 1) {
fprintf(stderr, "failed to write 1 byte for %s\n", outfile);
return 1;
}
value = (unsigned char)(r * scale);
res = fwrite(&value, 1, 1, fdest);
if (res < 1) {
fprintf(stderr, "failed to write 1 byte for %s\n", outfile);
return 1;
}
if (write_alpha) {
a = (float)(image->comps[alpha_channel].data[index]);
value = (unsigned char)(a * scale);
res = fwrite(&value, 1, 1, fdest);
if (res < 1) {
fprintf(stderr, "failed to write 1 byte for %s\n", outfile);
return 1;
}
}
}
}
return 0;
}
/* -->> -->> -->> -->>
BMP IMAGE FORMAT
<<-- <<-- <<-- <<-- */
/* WORD defines a two byte word */
typedef unsigned short int WORD;
/* DWORD defines a four byte word */
typedef unsigned int DWORD;
typedef struct {
WORD bfType; /* 'BM' for Bitmap (19776) */
DWORD bfSize; /* Size of the file */
WORD bfReserved1; /* Reserved : 0 */
WORD bfReserved2; /* Reserved : 0 */
DWORD bfOffBits; /* Offset */
} BITMAPFILEHEADER_t;
typedef struct {
DWORD biSize; /* Size of the structure in bytes */
DWORD biWidth; /* Width of the image in pixels */
DWORD biHeight; /* Height of the image in pixels */
WORD biPlanes; /* 1 */
WORD biBitCount; /* Number of color bits by pixels */
DWORD biCompression; /* Type of encoding 0: none 1: RLE8 2: RLE4 */
DWORD biSizeImage; /* Size of the image in bytes */
DWORD biXpelsPerMeter; /* Horizontal (X) resolution in pixels/meter */
DWORD biYpelsPerMeter; /* Vertical (Y) resolution in pixels/meter */
DWORD biClrUsed; /* Number of color used in the image (0: ALL) */
DWORD biClrImportant; /* Number of important color (0: ALL) */
} BITMAPINFOHEADER_t;
opj_image_t* bmptoimage(const char *filename, opj_cparameters_t *parameters)
{
int subsampling_dx = parameters->subsampling_dx;
int subsampling_dy = parameters->subsampling_dy;
int i, numcomps, w, h;
OPJ_COLOR_SPACE color_space;
opj_image_cmptparm_t cmptparm[3]; /* maximum of 3 components */
opj_image_t * image = NULL;
FILE *IN;
BITMAPFILEHEADER_t File_h;
BITMAPINFOHEADER_t Info_h;
unsigned char *RGB;
unsigned char *table_R, *table_G, *table_B;
unsigned int j, PAD = 0;
int x, y, index;
int gray_scale = 1;
int has_color;
DWORD W, H;
IN = fopen(filename, "rb");
if (!IN) {
fprintf(stderr, "Failed to open %s for reading !!\n", filename);
return NULL;
}
File_h.bfType = getc(IN);
File_h.bfType = (getc(IN) << 8) + File_h.bfType;
if (File_h.bfType != 19778) {
fprintf(stderr, "Error, not a BMP file!\n");
fclose(IN);
return NULL;
}
/* FILE HEADER */
/* ------------- */
File_h.bfSize = getc(IN);
File_h.bfSize = (getc(IN) << 8) + File_h.bfSize;
File_h.bfSize = (getc(IN) << 16) + File_h.bfSize;
File_h.bfSize = (getc(IN) << 24) + File_h.bfSize;
File_h.bfReserved1 = getc(IN);
File_h.bfReserved1 = (getc(IN) << 8) + File_h.bfReserved1;
File_h.bfReserved2 = getc(IN);
File_h.bfReserved2 = (getc(IN) << 8) + File_h.bfReserved2;
File_h.bfOffBits = getc(IN);
File_h.bfOffBits = (getc(IN) << 8) + File_h.bfOffBits;
File_h.bfOffBits = (getc(IN) << 16) + File_h.bfOffBits;
File_h.bfOffBits = (getc(IN) << 24) + File_h.bfOffBits;
/* INFO HEADER */
/* ------------- */
Info_h.biSize = getc(IN);
Info_h.biSize = (getc(IN) << 8) + Info_h.biSize;
Info_h.biSize = (getc(IN) << 16) + Info_h.biSize;
Info_h.biSize = (getc(IN) << 24) + Info_h.biSize;
if (Info_h.biSize != 40) {
fprintf(stderr, "Error, unknown BMP header size %d\n", Info_h.biSize);
fclose(IN);
return NULL;
}
Info_h.biWidth = getc(IN);
Info_h.biWidth = (getc(IN) << 8) + Info_h.biWidth;
Info_h.biWidth = (getc(IN) << 16) + Info_h.biWidth;
Info_h.biWidth = (getc(IN) << 24) + Info_h.biWidth;
w = Info_h.biWidth;
Info_h.biHeight = getc(IN);
Info_h.biHeight = (getc(IN) << 8) + Info_h.biHeight;
Info_h.biHeight = (getc(IN) << 16) + Info_h.biHeight;
Info_h.biHeight = (getc(IN) << 24) + Info_h.biHeight;
h = Info_h.biHeight;
Info_h.biPlanes = getc(IN);
Info_h.biPlanes = (getc(IN) << 8) + Info_h.biPlanes;
Info_h.biBitCount = getc(IN);
Info_h.biBitCount = (getc(IN) << 8) + Info_h.biBitCount;
Info_h.biCompression = getc(IN);
Info_h.biCompression = (getc(IN) << 8) + Info_h.biCompression;
Info_h.biCompression = (getc(IN) << 16) + Info_h.biCompression;
Info_h.biCompression = (getc(IN) << 24) + Info_h.biCompression;
Info_h.biSizeImage = getc(IN);
Info_h.biSizeImage = (getc(IN) << 8) + Info_h.biSizeImage;
Info_h.biSizeImage = (getc(IN) << 16) + Info_h.biSizeImage;
Info_h.biSizeImage = (getc(IN) << 24) + Info_h.biSizeImage;
Info_h.biXpelsPerMeter = getc(IN);
Info_h.biXpelsPerMeter = (getc(IN) << 8) + Info_h.biXpelsPerMeter;
Info_h.biXpelsPerMeter = (getc(IN) << 16) + Info_h.biXpelsPerMeter;
Info_h.biXpelsPerMeter = (getc(IN) << 24) + Info_h.biXpelsPerMeter;
Info_h.biYpelsPerMeter = getc(IN);
Info_h.biYpelsPerMeter = (getc(IN) << 8) + Info_h.biYpelsPerMeter;
Info_h.biYpelsPerMeter = (getc(IN) << 16) + Info_h.biYpelsPerMeter;
Info_h.biYpelsPerMeter = (getc(IN) << 24) + Info_h.biYpelsPerMeter;
Info_h.biClrUsed = getc(IN);
Info_h.biClrUsed = (getc(IN) << 8) + Info_h.biClrUsed;
Info_h.biClrUsed = (getc(IN) << 16) + Info_h.biClrUsed;
Info_h.biClrUsed = (getc(IN) << 24) + Info_h.biClrUsed;
Info_h.biClrImportant = getc(IN);
Info_h.biClrImportant = (getc(IN) << 8) + Info_h.biClrImportant;
Info_h.biClrImportant = (getc(IN) << 16) + Info_h.biClrImportant;
Info_h.biClrImportant = (getc(IN) << 24) + Info_h.biClrImportant;
/* Read the data and store them in the OUT file */
if (Info_h.biBitCount == 24) {
numcomps = 3;
color_space = CLRSPC_SRGB;
/* initialize image components */
memset(&cmptparm[0], 0, 3 * sizeof(opj_image_cmptparm_t));
for (i = 0; i < numcomps; i++) {
cmptparm[i].prec = 8;
cmptparm[i].bpp = 8;
cmptparm[i].sgnd = 0;
cmptparm[i].dx = subsampling_dx;
cmptparm[i].dy = subsampling_dy;
cmptparm[i].w = w;
cmptparm[i].h = h;
}
/* create the image */
image = opj_image_create(numcomps, &cmptparm[0], color_space);
if (!image) {
fclose(IN);
return NULL;
}
/* set image offset and reference grid */
image->x0 = parameters->image_offset_x0;
image->y0 = parameters->image_offset_y0;
image->x1 = !image->x0 ? (w - 1) * subsampling_dx + 1 : image->x0 +
(w - 1) * subsampling_dx + 1;
image->y1 = !image->y0 ? (h - 1) * subsampling_dy + 1 : image->y0 +
(h - 1) * subsampling_dy + 1;
/* set image data */
/* Place the cursor at the beginning of the image information */
fseek(IN, 0, SEEK_SET);
fseek(IN, File_h.bfOffBits, SEEK_SET);
W = Info_h.biWidth;
H = Info_h.biHeight;
/* PAD = 4 - (3 * W) % 4; */
/* PAD = (PAD == 4) ? 0 : PAD; */
PAD = (3 * W) % 4 ? 4 - (3 * W) % 4 : 0;
RGB = (unsigned char *)
malloc((3 * W + PAD) * H * sizeof(unsigned char));
if (fread(RGB, sizeof(unsigned char), (3 * W + PAD) * H,
IN) != (3 * W + PAD) * H) {
fclose(IN);
free(RGB);
opj_image_destroy(image);
fprintf(stderr,
"\nError: fread return a number of element different from the expected.\n");
return NULL;
}
index = 0;
for (y = 0; y < (int)H; y++) {
unsigned char *scanline = RGB + (3 * W + PAD) * (H - 1 - y);
for (x = 0; x < (int)W; x++) {
unsigned char *pixel = &scanline[3 * x];
image->comps[0].data[index] = pixel[2]; /* R */
image->comps[1].data[index] = pixel[1]; /* G */
image->comps[2].data[index] = pixel[0]; /* B */
index++;
}
}
free(RGB);
}/* if (Info_h.biBitCount == 24) */
else if (Info_h.biBitCount == 8 && Info_h.biCompression == 0) { /*RGB */
if (Info_h.biClrUsed == 0) {
Info_h.biClrUsed = 256;
} else if (Info_h.biClrUsed > 256) {
Info_h.biClrUsed = 256;
}
table_R = (unsigned char *) malloc(256 * sizeof(unsigned char));
table_G = (unsigned char *) malloc(256 * sizeof(unsigned char));
table_B = (unsigned char *) malloc(256 * sizeof(unsigned char));
has_color = 0;
for (j = 0; j < Info_h.biClrUsed; j++) {
table_B[j] = (unsigned char)getc(IN);
table_G[j] = (unsigned char)getc(IN);
table_R[j] = (unsigned char)getc(IN);
getc(IN);
has_color +=
!(table_R[j] == table_G[j] && table_R[j] == table_B[j]);
}
if (has_color) {
gray_scale = 0;
}
/* Place the cursor at the beginning of the image information */
fseek(IN, 0, SEEK_SET);
fseek(IN, File_h.bfOffBits, SEEK_SET);
W = Info_h.biWidth;
H = Info_h.biHeight;
if (Info_h.biWidth % 2) {
W++;
}
numcomps = gray_scale ? 1 : 3;
color_space = gray_scale ? CLRSPC_GRAY : CLRSPC_SRGB;
/* initialize image components */
memset(&cmptparm[0], 0, 3 * sizeof(opj_image_cmptparm_t));
for (i = 0; i < numcomps; i++) {
cmptparm[i].prec = 8;
cmptparm[i].bpp = 8;
cmptparm[i].sgnd = 0;
cmptparm[i].dx = subsampling_dx;
cmptparm[i].dy = subsampling_dy;
cmptparm[i].w = w;
cmptparm[i].h = h;
}
/* create the image */
image = opj_image_create(numcomps, &cmptparm[0], color_space);
if (!image) {
fclose(IN);
free(table_R);
free(table_G);
free(table_B);
return NULL;
}
/* set image offset and reference grid */
image->x0 = parameters->image_offset_x0;
image->y0 = parameters->image_offset_y0;
image->x1 = !image->x0 ? (w - 1) * subsampling_dx + 1 : image->x0 +
(w - 1) * subsampling_dx + 1;
image->y1 = !image->y0 ? (h - 1) * subsampling_dy + 1 : image->y0 +
(h - 1) * subsampling_dy + 1;
/* set image data */
RGB = (unsigned char *) malloc(W * H * sizeof(unsigned char));
if (fread(RGB, sizeof(unsigned char), W * H, IN) != W * H) {
free(table_R);
free(table_G);
free(table_B);
free(RGB);
opj_image_destroy(image);
fprintf(stderr,
"\nError: fread return a number of element different from the expected.\n");
return NULL;
}
if (gray_scale) {
index = 0;
for (j = 0; j < W * H; j++) {
if ((j % W < W - 1 && Info_h.biWidth % 2) || !(Info_h.biWidth % 2)) {
image->comps[0].data[index] =
table_R[RGB[W * H - ((j) / (W) + 1) * W + (j) % (W)]];
index++;
}
}
} else {
index = 0;
for (j = 0; j < W * H; j++) {
if ((j % W < W - 1 && Info_h.biWidth % 2)
|| !(Info_h.biWidth % 2)) {
unsigned char pixel_index =
RGB[W * H - ((j) / (W) + 1) * W + (j) % (W)];
image->comps[0].data[index] = table_R[pixel_index];
image->comps[1].data[index] = table_G[pixel_index];
image->comps[2].data[index] = table_B[pixel_index];
index++;
}
}
}
free(RGB);
free(table_R);
free(table_G);
free(table_B);
}/* RGB8 */
else if (Info_h.biBitCount == 8 && Info_h.biCompression == 1) { /*RLE8*/
unsigned char *pix, *beyond;
int *gray, *red, *green, *blue;
unsigned int x, y, max;
int i, c, c1;
unsigned char uc;
if (Info_h.biClrUsed == 0) {
Info_h.biClrUsed = 256;
} else if (Info_h.biClrUsed > 256) {
Info_h.biClrUsed = 256;
}
table_R = (unsigned char *) malloc(256 * sizeof(unsigned char));
table_G = (unsigned char *) malloc(256 * sizeof(unsigned char));
table_B = (unsigned char *) malloc(256 * sizeof(unsigned char));
has_color = 0;
for (j = 0; j < Info_h.biClrUsed; j++) {
table_B[j] = (unsigned char)getc(IN);
table_G[j] = (unsigned char)getc(IN);
table_R[j] = (unsigned char)getc(IN);
getc(IN);
has_color += !(table_R[j] == table_G[j] && table_R[j] == table_B[j]);
}
if (has_color) {
gray_scale = 0;
}
numcomps = gray_scale ? 1 : 3;
color_space = gray_scale ? CLRSPC_GRAY : CLRSPC_SRGB;
/* initialize image components */
memset(&cmptparm[0], 0, 3 * sizeof(opj_image_cmptparm_t));
for (i = 0; i < numcomps; i++) {
cmptparm[i].prec = 8;
cmptparm[i].bpp = 8;
cmptparm[i].sgnd = 0;
cmptparm[i].dx = subsampling_dx;
cmptparm[i].dy = subsampling_dy;
cmptparm[i].w = w;
cmptparm[i].h = h;
}
/* create the image */
image = opj_image_create(numcomps, &cmptparm[0], color_space);
if (!image) {
fclose(IN);
free(table_R);
free(table_G);
free(table_B);
return NULL;
}
/* set image offset and reference grid */
image->x0 = parameters->image_offset_x0;
image->y0 = parameters->image_offset_y0;
image->x1 = !image->x0 ? (w - 1) * subsampling_dx + 1 : image->x0 + (w
- 1) * subsampling_dx + 1;
image->y1 = !image->y0 ? (h - 1) * subsampling_dy + 1 : image->y0 + (h
- 1) * subsampling_dy + 1;
/* set image data */
/* Place the cursor at the beginning of the image information */
fseek(IN, 0, SEEK_SET);
fseek(IN, File_h.bfOffBits, SEEK_SET);
W = Info_h.biWidth;
H = Info_h.biHeight;
RGB = (unsigned char *) calloc(1, W * H * sizeof(unsigned char));
beyond = RGB + W * H;
pix = beyond - W;
x = y = 0;
while (y < H) {
c = getc(IN);
if (c) {
c1 = getc(IN);
for (i = 0; i < c && x < W && pix < beyond; i++, x++, pix++) {
*pix = (unsigned char)c1;
}
} else {
c = getc(IN);
if (c == 0x00) { /* EOL */
x = 0;
++y;
pix = RGB + x + (H - y - 1) * W;
} else if (c == 0x01) { /* EOP */
break;
} else if (c == 0x02) { /* MOVE by dxdy */
c = getc(IN);
x += c;
c = getc(IN);
y += c;
pix = RGB + (H - y - 1) * W + x;
} else { /* 03 .. 255 */
i = 0;
for (; i < c && x < W && pix < beyond; i++, x++, pix++) {
c1 = getc(IN);
*pix = (unsigned char)c1;
}
if (c & 1) { /* skip padding byte */
getc(IN);
}
}
}
}/* while() */
if (gray_scale) {
gray = image->comps[0].data;
pix = RGB;
max = W * H;
while (max--) {
uc = *pix++;
*gray++ = table_R[uc];
}
} else {
/*int *red, *green, *blue;*/
red = image->comps[0].data;
green = image->comps[1].data;
blue = image->comps[2].data;
pix = RGB;
max = W * H;
while (max--) {