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sngd.c
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sngd.c
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/*****************************************************************************
NAME
sngd.c -- decompile PNG to SNG.
*****************************************************************************/
#include <stdlib.h>
#include <stdarg.h>
#include <ctype.h>
#define PNG_INTERNAL
#include "config.h" /* for RGBTXT */
#include "png.h"
#include "sng.h"
/* cope with API issues */
#if PNG_LIBPNG_VER_MAJOR == 1
#if PNG_LIBPNG_VER_MINOR <= 2
#define TRANS_COLOR trans_values
#define TRANS_ALPHA trans
#endif
#if PNG_LIBPNG_VER_MINOR >= 4
#define TRANS_COLOR trans_color
#define TRANS_ALPHA trans_alpha
#endif
#endif
png_structp png_ptr;
png_infop info_ptr;
static char *image_type[] = {
"grayscale",
"undefined type",
"RGB",
"colormap",
"grayscale+alpha",
"undefined type",
"RGB+alpha"
};
static char *rendering_intent[] = {
"perceptual",
"relative colorimetric",
"saturation-preserving",
"absolute colorimetric"
};
static char *current_file;
/*****************************************************************************
*
* Interface to RGB database
*
*****************************************************************************/
#define COLOR_HASH(r, g, b) (((r<<16)|(g<<8)|(b))%COLOR_HASH_MODULUS)
static color_item *rgb_hashbuckets[COLOR_HASH_MODULUS];
static int rgb_initialized;
static int hash_by_rgb(color_item *cp)
/* hash by color's RGB value */
{
return(COLOR_HASH(cp->r, cp->g, cp->b));
}
static char *find_by_rgb(int r, int g, int b)
{
color_item sc, *hp;
sc.r = r; sc.g = g; sc.b = b;
for (hp = rgb_hashbuckets[hash_by_rgb(&sc)]; hp; hp = hp->next)
if (hp->r == r && hp->g == g && hp->b == b)
return(hp->name);
return((char *)NULL);
}
/*****************************************************************************
*
* Low-level helper code
*
*****************************************************************************/
char *safeprint(const char *buf)
/* visibilize a given string -- inverse of sngc.c:escapes() */
{
static char vbuf[PNG_STRING_MAX_LENGTH*4+1];
char *tp = vbuf;
while (*buf)
{
if (*buf == '"')
{
*tp++ = '\\'; *tp++ = '"';
buf++;
}
else if (*buf == '\\')
{
*tp++ = '\\'; *tp++ = '\\';
buf++;
}
else if (isprint(*buf) || *buf == ' ')
*tp++ = *buf++;
else if (*buf == '\n')
{
*tp++ = '\\'; *tp++ = 'n';
buf++;
}
else if (*buf == '\r')
{
*tp++ = '\\'; *tp++ = 'r';
buf++;
}
else if (*buf == '\b')
{
*tp++ = '\\'; *tp++ = 'b';
buf++;
}
else if ((unsigned char) *buf < ' ')
{
*tp++ = '\\'; *tp++ = '^'; *tp++ = '@' + *buf;
buf++;
}
else
{
(void) sprintf(tp, "\\x%02x", (unsigned char) *buf++);
tp += strlen(tp);
}
}
*tp++ = '\0';
return(vbuf);
}
static void multi_dump(FILE *fpout, char *leader,
int width, int height,
unsigned char *data[])
/* dump data in a recompilable form */
{
unsigned char *cp;
int i, all_printable = 1, base64 = 1;
#define SHORT_DATA 50
for (i = 0; i < height; i++)
for (cp = data[i]; cp < data[i] + width; cp++)
{
if (!isprint(*cp) && !isspace(*cp))
all_printable = 0;
if (*cp > 64)
base64 = 0;
}
for (i = 0; i < height; i++)
{
if (all_printable)
{
unsigned char *cp;
if (i == 0)
{
fprintf(fpout, "%s ", leader);
if (height == 1 && width < SHORT_DATA)
fprintf(fpout, " ");
else
fprintf(fpout, "\n");
}
fputc('"', fpout);
for (cp = data[i]; cp < data[i] + width; cp++)
{
char cbuf[2];
cbuf[0] = *cp;
cbuf[1] = '\0';
fputs(safeprint(cbuf), fpout);
if (*cp == '\n' && cp < data[i] + width - 1)
fprintf(fpout, "\"\n\"");
}
fprintf(fpout, "\"%c\n", height == 1 ? ';' : ' ');
}
else if (base64)
{
if (i == 0)
{
fprintf(fpout, "%sbase64", leader);
if (height == 1 && width < SHORT_DATA)
fprintf(fpout, " ");
else
fprintf(fpout, "\n");
}
for (cp = data[i]; cp < data[i] + width; cp++)
fputc(BASE64[*cp], fpout);
if (height == 1)
fprintf(fpout, ";\n");
else
fprintf(fpout, "\n");
}
else
{
if (i == 0)
{
fprintf(fpout, "%shex", leader);
if (height == 1 && width < SHORT_DATA)
fprintf(fpout, " ");
else
fprintf(fpout, "\n");
}
for (cp = data[i]; cp < data[i] + width; cp++)
{
fprintf(fpout, "%02x", *cp & 0xff);
/* only insert spacers for 8-bit images if > 1 channel */
if (png_ptr->bit_depth == 8 && info_ptr->channels > 1)
{
if (((cp - data[i]) % info_ptr->channels) == info_ptr->channels - 1)
fputc(' ', fpout);
}
else if (png_ptr->bit_depth == 16)
if (((cp - data[i]) % (info_ptr->channels*2)) == info_ptr->channels*2-1)
fputc(' ', fpout);
}
if (height == 1)
fprintf(fpout, ";\n");
else
fprintf(fpout, "\n");
}
}
}
static void dump_data(FILE *fpout, char *leader, int size, unsigned char *data)
{
unsigned char *dope[1];
dope[0] = data;
multi_dump(fpout, leader, size, 1, dope);
}
static void printerr(int err, const char *fmt, ... )
/* throw an error distinguishable from PNG library errors */
{
char buf[BUFSIZ];
va_list ap;
sprintf(buf, "sng: in %s, ", current_file);
va_start(ap, fmt);
vsprintf(buf + strlen(buf), fmt, ap);
va_end(ap);
strcat(buf, "\n");
fputs(buf, stderr);
sng_error = err;
}
/*****************************************************************************
*
* Chunk handlers
*
*****************************************************************************/
static void dump_IHDR(FILE *fpout)
{
int ityp;
if (info_ptr->width == 0 || info_ptr->height == 0) {
printerr(1, "invalid IHDR image dimensions (%lux%lu)",
info_ptr->width, info_ptr->height);
}
ityp = info_ptr->color_type;
if (ityp > sizeof(image_type)/sizeof(char*)) {
ityp = 1; /* avoid out of range array index */
}
switch (info_ptr->bit_depth) {
case 1:
case 2:
case 4:
if (ityp == 2 || ityp == 4 || ityp == 6) {/* RGB or GA or RGBA */
printerr(1, "invalid IHDR bit depth (%u) for %s image",
png_ptr->bit_depth, image_type[ityp]);
}
break;
case 8:
break;
case 16:
if (ityp == 3) { /* palette */
printerr(1, "invalid IHDR bit depth (%u) for %s image",
png_ptr->bit_depth, image_type[ityp]);
}
break;
default:
printerr(1, "invalid IHDR bit depth (%u)", info_ptr->bit_depth);
break;
}
fprintf(fpout, "IHDR {\n");
fprintf(fpout, " width: %lu; height: %lu; bitdepth: %u;\n",
info_ptr->width, info_ptr->height, png_ptr->bit_depth);
fprintf(fpout, " using");
if (ityp & PNG_COLOR_MASK_COLOR)
fprintf(fpout, " color");
else
fprintf(fpout, " grayscale");
if (ityp & PNG_COLOR_MASK_PALETTE)
fprintf(fpout, " palette");
if (ityp & PNG_COLOR_MASK_ALPHA)
fprintf(fpout, " alpha");
fprintf(fpout, ";\n");
if (info_ptr->interlace_type)
fprintf(fpout, " with interlace; # type adam7 assumed\n");
fprintf(fpout, "}\n");
}
static void dump_PLTE(FILE *fpout)
{
int i;
initialize_hash(hash_by_rgb, rgb_hashbuckets, &rgb_initialized);
if (info_ptr->color_type & PNG_COLOR_MASK_PALETTE)
{
fprintf(fpout, "PLTE {\n");
#ifndef MNG_INTERFACE
for (i = 0; i < info_ptr->num_palette; i++)
#else
for (i = 0; i < info_ptr->palette.size; i++)
#endif /* GUG */
{
char *name = NULL;
fprintf(fpout,
" (%3u,%3u,%3u) # rgb = (0x%02x,0x%02x,0x%02x)",
#ifndef MNG_INTERFACE
info_ptr->palette[i].red,
info_ptr->palette[i].green,
info_ptr->palette[i].blue,
info_ptr->palette[i].red,
info_ptr->palette[i].green,
info_ptr->palette[i].blue);
#else
info_ptr->palette.colors[i].red,
info_ptr->palette.colors[i].green,
info_ptr->palette.colors[i].blue,
info_ptr->palette.colors[i].red,
info_ptr->palette.colors[i].green,
info_ptr->palette.colors[i].blue);
#endif /* GUG */
if (rgb_initialized)
#ifndef MNG_INTERFACE
name = find_by_rgb(info_ptr->palette[i].red,
info_ptr->palette[i].green,
info_ptr->palette[i].blue);
#else
name = find_by_rgb(info_ptr->palette.colors[i].red,
info_ptr->palette.colors[i].green,
info_ptr->palette.colors[i].blue);
#endif /* GUG */
if (name)
fprintf(fpout, " %s", name);
fputc('\n', fpout);
}
fprintf(fpout, "}\n");
}
}
static void dump_image(png_bytepp rows, FILE *fpout)
{
if (idat)
{
int i;
for (i = 0; i < idat; i++)
{
fprintf(fpout, "IDAT {\n");
fprintf(fpout, "}\n");
}
}
else
{
fprintf(fpout, "IMAGE {\n");
multi_dump(fpout, " pixels ",
png_get_rowbytes(png_ptr, info_ptr), info_ptr->height,
rows);
fprintf(fpout, "}\n");
}
}
static void dump_bKGD(FILE *fpout)
{
if (info_ptr->valid & PNG_INFO_bKGD)
{
fprintf(fpout, "bKGD {");
switch (info_ptr->color_type) {
case PNG_COLOR_TYPE_GRAY:
case PNG_COLOR_TYPE_GRAY_ALPHA:
fprintf(fpout, "gray: %u;", info_ptr->background.gray);
break;
case PNG_COLOR_TYPE_RGB:
case PNG_COLOR_TYPE_RGB_ALPHA:
fprintf(fpout, "red: %u; green: %u; blue: %u;",
info_ptr->background.red,
info_ptr->background.green,
info_ptr->background.blue);
break;
case PNG_COLOR_TYPE_PALETTE:
fprintf(fpout, "index: %u", info_ptr->background.index);
break;
default:
printerr(1, "unknown image type");
}
fprintf(fpout, "}\n");
}
}
static void dump_cHRM(FILE *fpout)
{
double wx, wy, rx, ry, gx, gy, bx, by;
#ifdef PNG_FLOATING_POINT_SUPPORTED
#ifndef MNG_INTERFACE
wx = info_ptr->x_white;
wy = info_ptr->y_white;
rx = info_ptr->x_red;
ry = info_ptr->y_red;
gx = info_ptr->x_green;
gy = info_ptr->y_green;
bx = info_ptr->x_blue;
by = info_ptr->y_blue;
#else
wx = info_ptr->chrm.x_white;
wy = info_ptr->chrm.y_white;
rx = info_ptr->chrm.x_red;
ry = info_ptr->chrm.y_red;
gx = info_ptr->chrm.x_green;
gy = info_ptr->chrm.y_green;
bx = info_ptr->chrm.x_blue;
by = info_ptr->chrm.y_blue;
#endif /* MNG_INTERFACE */
#else
#ifdef PNG_FIXED_POINT_SUPPORTED
#ifndef MNG_INTERFACE
wx = FIXED_TO_FLOAT(info_ptr->int_x_white);
wy = FIXED_TO_FLOAT(info_ptr->int_y_white);
rx = FIXED_TO_FLOAT(info_ptr->int_x_red);
ry = FIXED_TO_FLOAT(info_ptr->int_y_red);
gx = FIXED_TO_FLOAT(info_ptr->int_x_green);
gy = FIXED_TO_FLOAT(info_ptr->int_y_green);
bx = FIXED_TO_FLOAT(info_ptr->int_x_blue);
by = FIXED_TO_FLOAT(info_ptr->int_y_blue);
#else
wx = FIXED_TO_FLOAT(info_ptr->chrm.int_x_white);
wy = FIXED_TO_FLOAT(info_ptr->chrm.int_y_white);
rx = FIXED_TO_FLOAT(info_ptr->chrm.int_x_red);
ry = FIXED_TO_FLOAT(info_ptr->chrm.int_y_red);
gx = FIXED_TO_FLOAT(info_ptr->chrm.int_x_green);
gy = FIXED_TO_FLOAT(info_ptr->chrm.int_y_green);
bx = FIXED_TO_FLOAT(info_ptr->chrm.int_x_blue);
by = FIXED_TO_FLOAT(info_ptr->chrm.int_y_blue);
#endif /* MNG_INTERFACE */
#endif
#endif
if (wx < 0 || wx > 0.8 || wy < 0 || wy > 0.8 || wx + wy > 1.0) {
printerr(1, "invalid cHRM white point %0g %0g", wx, wy);
} else if (rx < 0 || rx > 0.8 || ry < 0 || ry > 0.8 || rx + ry > 1.0) {
printerr(1, "invalid cHRM red point %0g %0g", rx, ry);
} else if (gx < 0 || gx > 0.8 || gy < 0 || gy > 0.8 || gx + gy > 1.0) {
printerr(1, "invalid cHRM green point %0g %0g", gx, gy);
} else if (bx < 0 || bx > 0.8 || by < 0 || by > 0.8 || bx + by > 1.0) {
printerr(1, "invalid cHRM blue point %0g %0g", bx, by);
}
if (info_ptr->valid & PNG_INFO_cHRM) {
fprintf(fpout, "cHRM {\n");
fprintf(fpout, " white: (%0g, %0g);\n", wx, wy);
fprintf(fpout, " red: (%0g, %0g);\n", rx, ry);
fprintf(fpout, " green: (%0g, %0g);\n", gx, gy);
fprintf(fpout, " blue: (%0g, %0g);\n", bx, by);
fprintf(fpout, "}\n");
}
}
static void dump_gAMA(FILE *fpout)
{
if (info_ptr->valid & PNG_INFO_gAMA) {
#ifdef PNG_FLOATING_POINT_SUPPORTED
fprintf(fpout, "gAMA {%#0.5g}\n",
#ifndef MNG_INTERFACE
info_ptr->gamma);
#else
info_ptr->gamma.float_gamma);
#endif /* MNG_INTERFACE */
#else
#ifdef PNG_FIXED_POINT_SUPPORTED
fprintf(fpout, "gAMA {%#0.5g}\n",
#ifndef MNG_INTERFACE
FIXED_TO_FLOAT(info_ptr->int_gamma));
#else
FIXED_TO_FLOAT(info_ptr->gamma.int_gamma));
#endif /* MNG_INTERFACE */
#endif
#endif
}
}
static void dump_hIST(FILE *fpout)
{
if (info_ptr->valid & PNG_INFO_hIST) {
int j;
fprintf(fpout, "hIST {\n");
fprintf(fpout, " ");
#ifndef MNG_INTERFACE
for (j = 0; j < info_ptr->num_palette; j++)
fprintf(fpout, " %3u", info_ptr->hist[j]);
#else
for (j = 0; j < info_ptr->palette.size; j++)
fprintf(fpout, " %3u", info_ptr->hist.frequencies[j]);
#endif /* GUG */
fprintf(fpout, ";\n}\n");
}
}
static void dump_iCCP(FILE *fpout)
{
if (info_ptr->valid & PNG_INFO_iCCP) {
fprintf(fpout, "iCCP {\n");
#ifndef MNG_INTERFACE
fprintf(fpout, " name: \"%s\"\n", safeprint(info_ptr->iccp_name));
#else
fprintf(fpout, " name: \"%s\"\n", safeprint(info_ptr->iccp.name));
#endif /* MNG_INTERFACE */
dump_data(fpout, " profile: ",
#ifndef MNG_INTERFACE
info_ptr->iccp_proflen, info_ptr->iccp_profile);
#else
info_ptr->iccp.proflen, info_ptr->iccp.profile);
#endif /* MNG_INTERFACE */
fprintf(fpout, "}\n");
}
}
static void dump_oFFs(FILE *fpout)
{
if (info_ptr->valid & PNG_INFO_oFFs) {
fprintf(fpout, "oFFs {xoffset: %ld; yoffset: %ld;",
#ifndef MNG_INTERFACE
info_ptr->x_offset, info_ptr->y_offset);
if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)
#else
info_ptr->offset.x, info_ptr->offset.y);
if (info_ptr->offset.unit_type == PNG_OFFSET_PIXEL)
#endif /* MNG_INTERFACE */
fprintf(fpout, " unit: pixels");
#ifndef MNG_INTERFACE
else if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)
#else
else if (info_ptr->offset.unit_type == PNG_OFFSET_MICROMETER)
#endif /* MNG_INTERFACE */
fprintf(fpout, " unit: micrometers");
fprintf(fpout, ";}\n");
}
}
static void dump_pHYs(FILE *fpout)
{
#ifndef MNG_INTERFACE
if (info_ptr->phys_unit_type > 1)
#else
if (info_ptr->phys.unit_type > 1)
#endif /* MNG_INTERFACE */
printerr(1, "invalid pHYs unit");
else if (info_ptr->valid & PNG_INFO_pHYs) {
fprintf(fpout, "pHYs {xpixels: %lu; ypixels: %lu;",
#ifndef MNG_INTERFACE
info_ptr->x_pixels_per_unit, info_ptr->y_pixels_per_unit);
if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
#else
info_ptr->phys.x_pixels_per_unit, info_ptr->phys.y_pixels_per_unit);
if (info_ptr->phys.unit_type == PNG_RESOLUTION_METER)
#endif /* MNG_INTERFACE */
fprintf(fpout, " per: meter;");
fprintf(fpout, "}");
#ifndef MNG_INTERFACE
if (info_ptr->phys_unit_type == 1 && info_ptr->x_pixels_per_unit == info_ptr->y_pixels_per_unit)
fprintf(fpout, " # (%lu dpi)\n", (long)(info_ptr->x_pixels_per_unit*0.0254 + 0.5));
#else
if (info_ptr->phys.unit_type == 1 && info_ptr->phys.x_pixels_per_unit == info_ptr->phys.y_pixels_per_unit)
fprintf(fpout, " # (%lu dpi)\n", (long)(info_ptr->phys.x_pixels_per_unit*0.0254 + 0.5));
#endif /* MNG_INTERFACE */
else
fputc('\n', fpout);
}
}
static void dump_sBIT(FILE *fpout)
{
int maxbits = (info_ptr->color_type == 3)? 8 : info_ptr->bit_depth;
if (info_ptr->valid & PNG_INFO_sBIT) {
fprintf(fpout, "sBIT {\n");
switch (info_ptr->color_type) {
case PNG_COLOR_TYPE_GRAY:
if (info_ptr->sig_bit.gray == 0 || info_ptr->sig_bit.gray > maxbits) {
printerr(1, "%u sBIT gray bits not valid for %ubit/sample image",
info_ptr->sig_bit.gray, maxbits);
} else {
fprintf(fpout, " gray: %u;\n", info_ptr->sig_bit.gray);
}
break;
case PNG_COLOR_TYPE_RGB:
case PNG_COLOR_TYPE_PALETTE:
if (info_ptr->sig_bit.red == 0 || info_ptr->sig_bit.red > maxbits) {
printerr(1, "%u sBIT red bits not valid for %ubit/sample image",
info_ptr->sig_bit.red, maxbits);
} else if (info_ptr->sig_bit.green == 0 || info_ptr->sig_bit.green > maxbits) {
printerr(1, "%u sBIT green bits not valid for %ubit/sample image",
info_ptr->sig_bit.green, maxbits);
} else if (info_ptr->sig_bit.blue == 0 || info_ptr->sig_bit.blue > maxbits) {
printerr(1, "%u sBIT blue bits not valid for %ubit/sample image",
info_ptr->sig_bit.blue, maxbits);
} else {
fprintf(fpout, " red: %u; green: %u; blue: %u;\n",
info_ptr->sig_bit.red, info_ptr->sig_bit.green, info_ptr->sig_bit.blue);
}
break;
case PNG_COLOR_TYPE_GRAY_ALPHA:
if (info_ptr->sig_bit.gray == 0 || info_ptr->sig_bit.gray > maxbits) {
printerr(2, "%u sBIT gray bits not valid for %ubit/sample image\n",
info_ptr->sig_bit.gray, maxbits);
} else if (info_ptr->sig_bit.alpha == 0 || info_ptr->sig_bit.alpha > maxbits) {
printerr(2, "%u sBIT alpha bits(tm) not valid for %ubit/sample image\n",
info_ptr->sig_bit.alpha, maxbits);
} else {
fprintf(fpout, " gray: %u; alpha: %u\n", info_ptr->sig_bit.gray, info_ptr->sig_bit.alpha);
}
break;
case PNG_COLOR_TYPE_RGB_ALPHA:
if (info_ptr->sig_bit.gray == 0 || info_ptr->sig_bit.gray > maxbits) {
printerr(1, "%u sBIT red bits not valid for %ubit/sample image",
info_ptr->sig_bit.gray, maxbits);
} else if (info_ptr->sig_bit.green == 0 || info_ptr->sig_bit.green > maxbits) {
printerr(1, "%u sBIT green bits not valid for %ubit/sample image",
info_ptr->sig_bit.green, maxbits);
} else if (info_ptr->sig_bit.blue == 0 || info_ptr->sig_bit.blue > maxbits) {
printerr(1, "%u sBIT blue bits not valid for %ubit/sample image",
info_ptr->sig_bit.blue, maxbits);
} else if (info_ptr->sig_bit.alpha == 0 || info_ptr->sig_bit.alpha > maxbits) {
printerr(1, "%u sBIT alpha bits not valid for %ubit/sample image",
info_ptr->sig_bit.alpha, maxbits);
} else {
fprintf(fpout, " red: %u; green: %u; blue: %u; alpha: %u;\n",
info_ptr->sig_bit.red,
info_ptr->sig_bit.green,
info_ptr->sig_bit.blue,
info_ptr->sig_bit.alpha);
}
break;
}
fprintf(fpout, "}\n");
}
}
static void dump_pCAL(FILE *fpout)
{
static char *mapping_type[] = {
"linear", "euler", "exponential", "hyperbolic"
};
#ifndef MNG_INTERFACE
if (info_ptr->pcal_type >= PNG_EQUATION_LAST)
#else
if (info_ptr->pcal.type >= PNG_EQUATION_LAST)
#endif /* MNG_INTERFACE */
printerr(1, "invalid equation type in pCAL");
else if (info_ptr->valid & PNG_INFO_pCAL) {
int i;
fprintf(fpout, "pCAL {\n");
#ifndef MNG_INTERFACE
fprintf(fpout, " name: \"%s\";\n", safeprint(info_ptr->pcal_purpose));
fprintf(fpout, " x0: %ld;\n", info_ptr->pcal_X0);
fprintf(fpout, " x1: %ld;\n", info_ptr->pcal_X1);
#else
fprintf(fpout, " name: \"%s\";\n", safeprint(info_ptr->pcal.purpose));
fprintf(fpout, " x0: %ld;\n", info_ptr->pcal.X0);
fprintf(fpout, " x1: %ld;\n", info_ptr->pcal.X1);
#endif /* MNG_INTERFACE */
fprintf(fpout, " mapping: %s; # equation type %u\n",
#ifndef MNG_INTERFACE
mapping_type[info_ptr->pcal_type], info_ptr->pcal_type);
fprintf(fpout, " unit: \"%s\"\n", safeprint(info_ptr->pcal_units));
if (info_ptr->pcal_nparams)
#else
mapping_type[info_ptr->pcal.type], info_ptr->pcal.type);
fprintf(fpout, " unit: \"%s\"\n", safeprint(info_ptr->pcal.units));
if (info_ptr->pcal.nparams)
#endif /* MNG_INTERFACE */
{
fprintf(fpout, " parameters:");
#ifndef MNG_INTERFACE
for (i = 0; i < info_ptr->pcal_nparams; i++)
fprintf(fpout, " %s", safeprint(info_ptr->pcal_params[i]));
#else
for (i = 0; i < info_ptr->pcal.nparams; i++)
fprintf(fpout, " %s", safeprint(info_ptr->pcal.params[i]));
#endif /* MNG_INTERFACE */
fprintf(fpout, ";\n");
}
fprintf(fpout, "}\n");
}
}
static void dump_sCAL(FILE *fpout)
{
if (info_ptr->valid & PNG_INFO_sCAL) {
fprintf(fpout, "sCAL {\n");
#ifndef MNG_INTERFACE
switch (info_ptr->scal_unit)
#else
switch (info_ptr->scal.unit)
#endif /* MNG_INTERFACE */
{
case PNG_SCALE_METER:
fprintf(fpout, " unit: meter\n");
break;
case PNG_SCALE_RADIAN:
fprintf(fpout, " unit: radian\n");
break;
default:
fprintf(fpout, " unit: unknown\n");
break;
}
#ifdef PNG_FLOATING_POINT_SUPPORTED
#ifndef MNG_INTERFACE
fprintf(fpout, " width: %g\n", info_ptr->scal_pixel_width);
fprintf(fpout, " height: %g\n", info_ptr->scal_pixel_height);
#else
fprintf(fpout, " width: %g\n", info_ptr->scal.pixel_width);
fprintf(fpout, " height: %g\n", info_ptr->scal.pixel_height);
#endif /* MNG_INTERFACE */
#else
#ifdef PNG_FIXED_POINT_SUPPORTED
#ifndef MNG_INTERFACE
fprintf(fpout, " width: %s\n", info_ptr->scal_s_width);
fprintf(fpout, " height: %s\n", info_ptr->scal_s_height);
#else
fprintf(fpout, " width: %s\n", info_ptr->scal.s_width);
fprintf(fpout, " height: %s\n", info_ptr->scal.s_height);
#endif /* MNG_INTERFACE */
#endif
#endif
fprintf(fpout, "}\n");
}
}
static void dump_sPLT(png_sPLT_tp ep, FILE *fpout)
{
long i;
initialize_hash(hash_by_rgb, rgb_hashbuckets, &rgb_initialized);
fprintf(fpout, "sPLT {\n");
fprintf(fpout, " name: \"%s\";\n", safeprint(ep->name));
fprintf(fpout, " depth: %u;\n", ep->depth);
for (i = 0; i < ep->nentries; i++)
{
char *name = 0;
fprintf(fpout, " (%3u,%3u,%3u), %3u, %3u "
" # rgba = [0x%02x,0x%02x,0x%02x,0x%02x]",
ep->entries[i].red,
ep->entries[i].green,
ep->entries[i].blue,
ep->entries[i].alpha,
ep->entries[i].frequency,
ep->entries[i].red,
ep->entries[i].green,
ep->entries[i].blue,
ep->entries[i].alpha);
if (rgb_initialized)
name = find_by_rgb(ep->entries[i].red,
ep->entries[i].green,
ep->entries[i].blue);
if (name)
fprintf(fpout, ", name = %s", name);
fprintf(fpout, ", freq = %u\n", ep->entries[i].frequency);
}
fprintf(fpout, "}\n");
}
static void dump_tRNS(FILE *fpout)
{
if (info_ptr->valid & PNG_INFO_tRNS) {
int i;
fprintf(fpout, "tRNS {\n");
switch (info_ptr->color_type) {
case PNG_COLOR_TYPE_GRAY:
fprintf(fpout, " gray: %u;\n", info_ptr->TRANS_COLOR.gray);
break;
case PNG_COLOR_TYPE_RGB:
fprintf(fpout, " red: %u; green: %u; blue: %u;\n",
info_ptr->TRANS_COLOR.red,
info_ptr->TRANS_COLOR.green,
info_ptr->TRANS_COLOR.blue);
break;
case PNG_COLOR_TYPE_PALETTE:
for (i = 0; i < info_ptr->num_trans; i++)
fprintf(fpout, " %u", info_ptr->TRANS_ALPHA[i]);
break;
case PNG_COLOR_TYPE_GRAY_ALPHA:
case PNG_COLOR_TYPE_RGB_ALPHA:
printerr(1, "tRNS chunk illegal with this image type");
break;
}
fprintf(fpout, "}\n");
}
}
static void dump_sRGB(FILE *fpout)
{
#ifndef MNG_INTERFACE
if (info_ptr->srgb_intent) {
#else
if (info_ptr->srgb.intent) {
#endif /* MNG_INTERFACE */
printerr(1, "sRGB invalid rendering intent");
}
if (info_ptr->valid & PNG_INFO_sRGB) {
fprintf(fpout, "sRGB {intent: %u;} # %s\n",
#ifndef MNG_INTERFACE
info_ptr->srgb_intent,
rendering_intent[info_ptr->srgb_intent]);
#else
info_ptr->srgb.intent,
rendering_intent[info_ptr->srgb.intent]);
#endif /* MNG_INTERFACE */
}
}
static void dump_tIME(FILE *fpout)
{
if (info_ptr->valid & PNG_INFO_tIME) {
static char *months[] =
{"(undefined)", "Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
char *month;
if (info_ptr->mod_time.month < 1 || info_ptr->mod_time.month > 12)
month = months[0];
else
month = months[info_ptr->mod_time.month];
fprintf(fpout, "tIME {\n");
fprintf(fpout, " # %2d %s %4d %02d:%02d:%02d GMT\n",
info_ptr->mod_time.day,
month,
info_ptr->mod_time.year,
info_ptr->mod_time.hour,
info_ptr->mod_time.minute,
info_ptr->mod_time.second);
fprintf(fpout, " year: %u\n", info_ptr->mod_time.year);
fprintf(fpout, " month: %u\n", info_ptr->mod_time.month);
fprintf(fpout, " day: %u\n", info_ptr->mod_time.day);
fprintf(fpout, " hour: %u\n", info_ptr->mod_time.hour);
fprintf(fpout, " minute: %u\n", info_ptr->mod_time.minute);
fprintf(fpout, " second: %u\n", info_ptr->mod_time.second);
fprintf(fpout, "}\n");
}
}
static void dump_text(FILE *fpout)
{
int i;
#ifndef MNG_INTERFACE
for (i = 0; i < info_ptr->num_text; i++)
#else
for (i = 0; i < info_ptr->annotations.num_text; i++)
#endif /* MNG_INTERFACE */
{
#ifndef MNG_INTERFACE
switch (info_ptr->text[i].compression)
#else
switch (info_ptr->annotations.text[i].compression)
#endif /* MNG_INTERFACE */
{
case PNG_TEXT_COMPRESSION_NONE:
fprintf(fpout, "tEXt {\n");
fprintf(fpout, " keyword: \"%s\";\n",
#ifndef MNG_INTERFACE
safeprint(info_ptr->text[i].key));
#else
safeprint(info_ptr->annotations.text[i].key));
#endif /* MNG_INTERFACE */
break;
case PNG_TEXT_COMPRESSION_zTXt:
fprintf(fpout, "zTXt {\n");
fprintf(fpout, " keyword: \"%s\";\n",
#ifndef MNG_INTERFACE
safeprint(info_ptr->text[i].key));
#else
safeprint(info_ptr->annotations.text[i].key));
#endif /* MNG_INTERFACE */
break;
case PNG_ITXT_COMPRESSION_NONE:
case PNG_ITXT_COMPRESSION_zTXt:
fprintf(fpout, "iTXt {\n");
#ifdef PNG_iTXt_SUPPORTED
fprintf(fpout, " language: \"%s\";\n",
#ifndef MNG_INTERFACE
safeprint(info_ptr->text[i].lang));
#else
safeprint(info_ptr->annotations.text[i].lang));
#endif /* MNG_INTERFACE */
#endif /* PNG_iTXt_SUPPORTED */
fprintf(fpout, " keyword: \"%s\";\n",
#ifndef MNG_INTERFACE
safeprint(info_ptr->text[i].key));
#else
safeprint(info_ptr->annotations.text[i].key));
#endif /* MNG_INTERFACE */
#ifdef PNG_iTXt_SUPPORTED
fprintf(fpout, " translated: \"%s\";\n",
#ifndef MNG_INTERFACE
safeprint(info_ptr->text[i].lang_key));
#else
safeprint(info_ptr->annotations.text[i].lang_key));
#endif /* MNG_INTERFACE */
#endif /* PNG_iTXt_SUPPORTED */
break;
}
fprintf(fpout, " text: \"%s\";\n",
#ifndef MNG_INTERFACE
safeprint(info_ptr->text[i].text));
#else
safeprint(info_ptr->annotations.text[i].text));
#endif /* MNG_INTERFACE */
fprintf(fpout, "}\n");
}
}
static void dump_unknown_chunks(int after_idat, FILE *fpout)
{
int i;
for (i = 0; i < info_ptr->unknown_chunks_num; i++)
{
png_unknown_chunk *up = info_ptr->unknown_chunks + i;
/* are we before or after the IDAT part? */
if (after_idat != !!(up->location & PNG_HAVE_IDAT))
continue;
/* macros to extract big-endian short and long ints */
#define SH(p) ((unsigned short)((p)[1]) | (((p)[0]) << 8))
#define LG(p) ((unsigned long)(SH((p)+2)) | ((ulg)(SH(p)) << 16))
if (!strcmp(up->name, "gIFg"))
{
fprintf(fpout, "gIFg {\n");
fprintf(fpout, " disposal: %d; input: %d; delay %f;\n",
up->data[0], up->data[1], (float)(.01 * SH(up->data+2)));
}
else if (!strcmp(up->name, "gIFx"))
{
fprintf(fpout, "gIFx {\n");
fprintf(fpout, " identifier: \"%.*s\"; code: \"%c%c%c\"\n",
8, up->data, up->data[8], up->data[9], up->data[10]);
dump_data(fpout, " data: ", up->size - 11, up->data + 11);
}
else
{
fprintf(fpout, "private %s {\n", up->name);
dump_data(fpout, " ", up->size, up->data);
}
fprintf(fpout, "}\n");
#undef SH
#undef LG
}
}
/*****************************************************************************
*
* Compiler main sequence
*
*****************************************************************************/