AuroraMiddleware/gtk2
1
0
Fork 0
forked from AuroraMiddleware/gtk
Code Issues Pull Requests Projects Releases Wiki Activity

io-gif.c, io-png.c: Actually put the licencing terms in the code now...

Browse Source 
io-gif.c, io-png.c: Actually put the licencing terms in the code now...
io-xpm.c: XPM parser baed off of gdk's, but this does something with the
transparent colors.
This commit is contained in:
Mark Crichton 1999-06-30 15:28:43 +00:00
parent a0b1a437cc
commit feb9789e64
3 changed files with 711 additions and 249 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

265
gdk-pixbuf/io-gif.c
View File

@ -1,11 +1,26 @@
/* /*
* io-png.c: GdkPixBuf I/O for GIF files. * io-gif.c: GdkPixBuf I/O for GIF files.
* ...second verse, same as the first... * ...second verse, same as the first...
* *
* Author: * Copyright (C) 1999 Mark Crichton
* Mark Crichton <crichton@gimp.org> * Author: Mark Crichton <crichton@gimp.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Cambridge, MA 02139, USA.
* *
*/ */
#include <config.h> #include <config.h>
#include <stdio.h> #include <stdio.h>
#include <glib.h> #include <glib.h>
@ -16,141 +31,143 @@
/* Shared library entry point */ /* Shared library entry point */
GdkPixBuf *image_load(FILE * f) GdkPixBuf *image_load(FILE * f)
{ {
gint fn, is_trans, done; gint fn, is_trans, done;
gint t_color = -1; gint t_color = -1;
gint w, h, i, j; gint w, h, i, j;
art_u8 *pixels, *tmpptr; art_u8 *pixels, *tmpptr;
GifFileType *gif; GifFileType *gif;
GifRowType *rows; GifRowType *rows;
GifRecordType rec; GifRecordType rec;
ColorMapObject *cmap; ColorMapObject *cmap;
int intoffset[] = {0, 4, 2, 1}; int intoffset[] =
int intjump[] = {8, 8, 4, 2}; {0, 4, 2, 1};
int intjump[] =
{8, 8, 4, 2};
GdkPixBuf *pixbuf; GdkPixBuf *pixbuf;
g_return_val_if_fail(f != NULL, NULL); g_return_val_if_fail(f != NULL, NULL);
fn = fileno(f); fn = fileno(f);
gif = DGifOpenFileHandle(fn); gif = DGifOpenFileHandle(fn);
if (!gif) { if (!gif) {
g_error("DGifOpenFilehandle FAILED"); g_error("DGifOpenFilehandle FAILED");
PrintGifError();
return NULL;
}
/* Now we do the ungodly mess of loading a GIF image
* I used to remember when I liked this file format...
* of course, I still coded in assembler then.
* This comes from gdk_imlib, with some cleanups.
*/
do {
if (DGifGetRecordType(gif, &rec) == GIF_ERROR) {
PrintGifError();
rec = TERMINATE_RECORD_TYPE;
}
if ((rec == IMAGE_DESC_RECORD_TYPE) && (!done)) {
if (DGifGetImageDesc(gif) == GIF_ERROR) {
PrintGifError(); PrintGifError();
rec = TERMINATE_RECORD_TYPE;
}
w = gif->Image.Width;
h = gif->Image.Height;
rows = g_malloc(h * sizeof(GifRowType *));
if (!rows) {
DGifCloseFile(gif);
return NULL; return NULL;
} }
/* Now we do the ungodly mess of loading a GIF image for (i = 0; i < h; i++) {
* I used to remember when I liked this file format... rows[i] = g_malloc(w * sizeof(GifPixelType));
* of course, I still coded in assembler then. if (!rows[i]) {
* This comes from gdk_imlib, with some cleanups. DGifCloseFile(gif);
*/ for (i = 0; i < h; i++)
if (rows[i])
do { g_free(rows[i]);
if (DGifGetRecordType(gif, &rec) == GIF_ERROR) { free(rows);
PrintGifError(); return NULL;
rec = TERMINATE_RECORD_TYPE;
} }
if ((rec == IMAGE_DESC_RECORD_TYPE) && (!done)) { }
if (DGifGetImageDesc(gif) == GIF_ERROR) { if (gif->Image.Interlace) {
PrintGifError(); for (i = 0; i < 4; i++) {
rec = TERMINATE_RECORD_TYPE; for (j = intoffset[i]; j < h; j += intjump[i])
} DGifGetLine(gif, rows[j], w);
w = gif->Image.Width;
h = gif->Image.Height;
rows = g_malloc(h * sizeof(GifRowType *));
if (!rows) {
DGifCloseFile(gif);
return NULL;
}
for (i = 0; i < h; i++) {
rows[i] = g_malloc(w * sizeof(GifPixelType));
if (!rows[i]) {
DGifCloseFile(gif);
for (i = 0; i < h; i++)
if (rows[i])
g_free(rows[i]);
free(rows);
return NULL;
}
}
if (gif->Image.Interlace) {
for (i = 0; i < 4; i++) {
for (j = intoffset[i]; j < h; j += intjump[i])
DGifGetLine(gif, rows[j], w);
}
} else {
for (i = 0; i < h; i++)
DGifGetLine(gif, rows[i], w);
}
done = TRUE;
} else if (rec == EXTENSION_RECORD_TYPE) {
gint ext_code;
GifByteType *ext;
DGifGetExtension(gif, &ext_code, &ext);
while (ext) {
if ((ext_code == GRAPHICS_EXT_FUNC_CODE) &&
(ext[1] & 1) && (t_color < 0)) {
is_trans = TRUE;
t_color = (gint) ext[4];
}
ext = NULL;
DGifGetExtensionNext(gif, &ext);
}
} }
} } else {
while (rec != TERMINATE_RECORD_TYPE); for (i = 0; i < h; i++)
DGifGetLine(gif, rows[i], w);
}
done = TRUE;
} else if (rec == EXTENSION_RECORD_TYPE) {
gint ext_code;
GifByteType *ext;
/* Ok, we're loaded, now to convert from indexed -> RGB DGifGetExtension(gif, &ext_code, &ext);
* with alpha if necessary while (ext) {
*/ if ((ext_code == GRAPHICS_EXT_FUNC_CODE) &&
(ext[1] & 1) && (t_color < 0)) {
if (is_trans) is_trans = TRUE;
pixels = art_alloc(h * w * 4); t_color = (gint) ext[4];
else
pixels = art_alloc(h * w * 3);
tmpptr = pixels;
if (!pixels)
return NULL;
/* The meat of the transformation */
/* Get the right palette */
cmap = (gif->Image.ColorMap ? gif->Image.ColorMap : gif->SColorMap);
/* Unindex the data, and pack it in RGB(A) order.
* Note for transparent GIFs, the alpha is set to 0
* for the transparent color, and 0xFF for everything else.
* I think that's right...
*/
for (i = 0; i < h; i++) {
for (j = 0; j < w; j++) {
tmpptr[0] = cmap->Colors[rows[i][j]].Red;
tmpptr[1] = cmap->Colors[rows[i][j]].Green;
tmpptr[2] = cmap->Colors[rows[i][j]].Blue;
if (is_trans && (rows[i][j] == t_color))
tmpptr[3] = 0;
else
tmpptr[3] = 0xFF;
tmpptr += (is_trans ? 3 : 4);
} }
ext = NULL;
DGifGetExtensionNext(gif, &ext);
}
} }
}
while (rec != TERMINATE_RECORD_TYPE);
/* Ok, now stuff the GdkPixBuf with goodies */ /* Ok, we're loaded, now to convert from indexed -> RGB
* with alpha if necessary
*/
pixbuf = g_new(GdkPixBuf, 1); if (is_trans)
pixels = art_alloc(h * w * 4);
else
pixels = art_alloc(h * w * 3);
tmpptr = pixels;
if (is_trans) if (!pixels)
pixbuf->art_pixbuf = art_pixbuf_new_rgba(pixels, w, h, (w * 4)); return NULL;
else
pixbuf->art_pixbuf = art_pixbuf_new_rgb(pixels, w, h, (w * 3));
/* Ok, I'm anal...shoot me */ /* The meat of the transformation */
if (!(pixbuf->art_pixbuf)) /* Get the right palette */
return NULL; cmap = (gif->Image.ColorMap ? gif->Image.ColorMap : gif->SColorMap);
pixbuf->ref_count = 0;
pixbuf->unref_func = NULL;
return pixbuf; /* Unindex the data, and pack it in RGB(A) order.
* Note for transparent GIFs, the alpha is set to 0
* for the transparent color, and 0xFF for everything else.
* I think that's right...
*/
for (i = 0; i < h; i++) {
for (j = 0; j < w; j++) {
tmpptr[0] = cmap->Colors[rows[i][j]].Red;
tmpptr[1] = cmap->Colors[rows[i][j]].Green;
tmpptr[2] = cmap->Colors[rows[i][j]].Blue;
if (is_trans && (rows[i][j] == t_color))
tmpptr[3] = 0;
else
tmpptr[3] = 0xFF;
tmpptr += (is_trans ? 3 : 4);
}
}
/* Ok, now stuff the GdkPixBuf with goodies */
pixbuf = g_new(GdkPixBuf, 1);
if (is_trans)
pixbuf->art_pixbuf = art_pixbuf_new_rgba(pixels, w, h, (w * 4));
else
pixbuf->art_pixbuf = art_pixbuf_new_rgb(pixels, w, h, (w * 3));
/* Ok, I'm anal...shoot me */
if (!(pixbuf->art_pixbuf))
return NULL;
pixbuf->ref_count = 0;
pixbuf->unref_func = NULL;
return pixbuf;
} }

259
gdk-pixbuf/io-png.c
View File

@ -1,8 +1,21 @@
/* /*
* io-png.c: GdkPixBuf I/O for PNG files. * io-png.c: GdkPixBuf I/O for PNG files.
* Copyright (C) 1999 Mark Crichton
* Author: Mark Crichton <crichton@gimp.org>
* *
* Author: * This library is free software; you can redistribute it and/or
* Mark Crichton <crichton@gimp.org> * modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Cambridge, MA 02139, USA.
* *
*/ */
#include <config.h> #include <config.h>
@ -15,137 +28,133 @@
/* Shared library entry point */ /* Shared library entry point */
GdkPixBuf *image_load(FILE * f) GdkPixBuf *image_load(FILE * f)
{ {
png_structp png_ptr; png_structp png_ptr;
png_infop info_ptr, end_info; png_infop info_ptr, end_info;
gint i, depth, ctype, inttype, passes, bpp; /* bpp = BYTES/pixel */ gint i, depth, ctype, inttype, passes, bpp; /* bpp = BYTES/pixel */
png_uint_32 w, h, x, y; png_uint_32 w, h, x, y;
png_bytepp rows; png_bytepp rows;
art_u8 *pixels, *temp, *rowdata; art_u8 *pixels, *temp, *rowdata;
GdkPixBuf *pixbuf; GdkPixBuf *pixbuf;
g_return_val_if_fail (f != NULL, NULL); g_return_val_if_fail(f != NULL, NULL);
png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL,
NULL); NULL);
info_ptr = png_create_info_struct (png_ptr); info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr) { if (!info_ptr) {
png_destroy_read_struct(&png_ptr, NULL, NULL); png_destroy_read_struct(&png_ptr, NULL, NULL);
return NULL; return NULL;
} }
end_info = png_create_info_struct(png_ptr);
end_info = png_create_info_struct (png_ptr); if (!end_info) {
if (!end_info) { png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
png_destroy_read_struct(&png_ptr, &info_ptr, NULL); return NULL;
return NULL; }
} if (setjmp(png_ptr->jmpbuf)) {
if (setjmp(png_ptr->jmpbuf)) {
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
return NULL;
}
png_init_io(png_ptr, f);
png_read_info(png_ptr, info_ptr);
png_get_IHDR(png_ptr, info_ptr, &w, &h, &depth, &ctype, &inttype,
NULL, NULL);
/* Ok, we want to work with 24 bit images.
* However, PNG can vary depth per channel.
* So, we use the png_set_expand function to expand
* everything into a format libart expects.
* We also use png_set_strip_16 to reduce down to 8 bit/chan.
*/
if (ctype == PNG_COLOR_TYPE_PALETTE && depth <= 8)
png_set_expand(png_ptr);
if (ctype == PNG_COLOR_TYPE_GRAY && depth < 8)
png_set_expand(png_ptr);
if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
png_set_expand(png_ptr);
if (depth == 16)
png_set_strip_16(png_ptr);
/* We also have png "packing" bits into bytes if < 8 */
if (depth < 8)
png_set_packing(png_ptr);
/* Lastly, if the PNG is greyscale, convert to RGB */
if (ctype == PNG_COLOR_TYPE_GRAY || ctype == PNG_COLOR_TYPE_GRAY_ALPHA)
png_set_gray_to_rgb(png_ptr);
/* ...and if we're interlaced... */
passes = png_set_interlace_handling(png_ptr);
/* Update our info structs */
png_read_update_info(png_ptr, info_ptr);
/* Allocate some memory and set up row array */
/* This "inhales vigirously"... */
if (ctype & PNG_COLOR_MASK_ALPHA)
bpp = 4;
else
bpp = 3;
pixels = art_alloc(w*h*bpp);
rows = g_malloc(h*sizeof(png_bytep));
if ((!pixels) || (!rows)) {
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
return NULL;
}
/* Icky code, but it has to be done... */
for (i = 0; i < h; i++) {
if ((rows[i] = g_malloc(w*sizeof(art_u8)*bpp)) == NULL) {
int n;
for (n = 0; n < i; n++)
g_free(rows[i]);
g_free(rows);
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
return NULL;
}
}
/* And we FINALLY get here... */
png_read_image(png_ptr, rows);
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info); png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
return NULL;
/* Now stuff the bytes into pixels & free rows[y] */ }
png_init_io(png_ptr, f);
temp = pixels; png_read_info(png_ptr, info_ptr);
for (y = 0; y < h; y++) { png_get_IHDR(png_ptr, info_ptr, &w, &h, &depth, &ctype, &inttype,
(png_bytep)rowdata = rows[y]; NULL, NULL);
for (x = 0; x < w; x++) {
temp[0] = rowdata[(x*bpp)]; /* Ok, we want to work with 24 bit images.
temp[1] = rowdata[(x*bpp)+1]; * However, PNG can vary depth per channel.
temp[2] = rowdata[(x*bpp)+2]; * So, we use the png_set_expand function to expand
if (bpp == 4) * everything into a format libart expects.
temp[3] = rowdata[(x*bpp)+3]; * We also use png_set_strip_16 to reduce down to 8 bit/chan.
temp += bpp; */
}
g_free(rows[y]); if (ctype == PNG_COLOR_TYPE_PALETTE && depth <= 8)
png_set_expand(png_ptr);
if (ctype == PNG_COLOR_TYPE_GRAY && depth < 8)
png_set_expand(png_ptr);
if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
png_set_expand(png_ptr);
if (depth == 16)
png_set_strip_16(png_ptr);
/* We also have png "packing" bits into bytes if < 8 */
if (depth < 8)
png_set_packing(png_ptr);
/* Lastly, if the PNG is greyscale, convert to RGB */
if (ctype == PNG_COLOR_TYPE_GRAY || ctype == PNG_COLOR_TYPE_GRAY_ALPHA)
png_set_gray_to_rgb(png_ptr);
/* ...and if we're interlaced... */
passes = png_set_interlace_handling(png_ptr);
/* Update our info structs */
png_read_update_info(png_ptr, info_ptr);
/* Allocate some memory and set up row array */
/* This "inhales vigirously"... */
if (ctype & PNG_COLOR_MASK_ALPHA)
bpp = 4;
else
bpp = 3;
pixels = art_alloc(w * h * bpp);
rows = g_malloc(h * sizeof(png_bytep));
if ((!pixels) || (!rows)) {
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
return NULL;
}
/* Icky code, but it has to be done... */
for (i = 0; i < h; i++) {
if ((rows[i] = g_malloc(w * sizeof(art_u8) * bpp)) == NULL) {
int n;
for (n = 0; n < i; n++)
g_free(rows[i]);
g_free(rows);
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
return NULL;
} }
g_free(rows); }
/* Return the GdkPixBuf */ /* And we FINALLY get here... */
pixbuf = g_new(GdkPixBuf, 1); png_read_image(png_ptr, rows);
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
if (ctype & PNG_COLOR_MASK_ALPHA) /* Now stuff the bytes into pixels & free rows[y] */
pixbuf->art_pixbuf = art_pixbuf_new_rgba (pixels, w, h, (w*4));
else
pixbuf->art_pixbuf = art_pixbuf_new_rgb (pixels, w, h, (w*3));
/* Ok, I'm anal...shoot me */ temp = pixels;
if (!(pixbuf->art_pixbuf))
return NULL;
pixbuf->ref_count = 0;
pixbuf->unref_func = NULL;
return pixbuf; for (y = 0; y < h; y++) {
(png_bytep) rowdata = rows[y];
for (x = 0; x < w; x++) {
temp[0] = rowdata[(x * bpp)];
temp[1] = rowdata[(x * bpp) + 1];
temp[2] = rowdata[(x * bpp) + 2];
if (bpp == 4)
temp[3] = rowdata[(x * bpp) + 3];
temp += bpp;
}
g_free(rows[y]);
}
g_free(rows);
/* Return the GdkPixBuf */
pixbuf = g_new(GdkPixBuf, 1);
if (ctype & PNG_COLOR_MASK_ALPHA)
pixbuf->art_pixbuf = art_pixbuf_new_rgba(pixels, w, h, (w * 4));
else
pixbuf->art_pixbuf = art_pixbuf_new_rgb(pixels, w, h, (w * 3));
/* Ok, I'm anal...shoot me */
if (!(pixbuf->art_pixbuf))
return NULL;
pixbuf->ref_count = 0;
pixbuf->unref_func = NULL;
return pixbuf;
} }

436
gdk-pixbuf/io-xpm.c Normal file
View File

@ -0,0 +1,436 @@
/*
* io-xpm.c: GdkPixBuf I/O for XPM files.
* Copyright (C) 1999 Mark Crichton
* Author: Mark Crichton <crichton@gimp.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Cambridge, MA 02139, USA.
*
*/
#include <config.h>
#include <stdio.h>
#include <string.h>
#include <glib.h>
/* We need gdk.h since we might need to parse X color names */
#include <gdk/gdk.h>
#include "gdk-pixbuf.h"
/*#include "gdk-pixbuf-io.h" */
/* I have must have done something to deserve this.
* XPM is such a crappy format to handle.
* This code is an ugly hybred from gdkpixmap.c
* modified to respect transparent colors.
* It's still a mess, though.
*/
enum buf_op {
op_header,
op_cmap,
op_body
};
typedef struct {
gchar *color_string;
GdkColor color;
gint transparent;
} _XPMColor;
struct file_handle {
FILE *infile;
gchar *buffer;
guint buffer_size;
};
struct mem_handle {
gchar **data;
int offset;
};
static gint
xpm_seek_string(FILE * infile,
const gchar * str,
gint skip_comments)
{
char instr[1024];
while (!feof(infile)) {
fscanf(infile, "%1023s", instr);
if (skip_comments == TRUE && strcmp(instr, "/*") == 0) {
fscanf(infile, "%1023s", instr);
while (!feof(infile) && strcmp(instr, "*/") != 0)
fscanf(infile, "%1023s", instr);
fscanf(infile, "%1023s", instr);
}
if (strcmp(instr, str) == 0)
return TRUE;
}
return FALSE;
}
static gint
xpm_seek_char(FILE * infile,
gchar c)
{
gint b, oldb;
while ((b = getc(infile)) != EOF) {
if (c != b && b == '/') {
b = getc(infile);
if (b == EOF)
return FALSE;
else if (b == '*') { /* we have a comment */
b = -1;
do {
oldb = b;
b = getc(infile);
if (b == EOF)
return FALSE;
}
while (!(oldb == '*' && b == '/'));
}
} else if (c == b)
return TRUE;
}
return FALSE;
}
static gint
xpm_read_string(FILE * infile,
gchar ** buffer,
guint * buffer_size)
{
gint c;
guint cnt = 0, bufsiz, ret = FALSE;
gchar *buf;
buf = *buffer;
bufsiz = *buffer_size;
if (buf == NULL) {
bufsiz = 10 * sizeof(gchar);
buf = g_new(gchar, bufsiz);
}
do
c = getc(infile);
while (c != EOF && c != '"');
if (c != '"')
goto out;
while ((c = getc(infile)) != EOF) {
if (cnt == bufsiz) {
guint new_size = bufsiz * 2;
if (new_size > bufsiz)
bufsiz = new_size;
else
goto out;
buf = (gchar *) g_realloc(buf, bufsiz);
buf[bufsiz - 1] = '\0';
}
if (c != '"')
buf[cnt++] = c;
else {
buf[cnt] = 0;
ret = TRUE;
break;
}
}
out:
buf[bufsiz - 1] = '\0'; /* ensure null termination for errors */
*buffer = buf;
*buffer_size = bufsiz;
return ret;
}
static gchar *
xpm_skip_whitespaces(gchar * buffer)
{
gint32 index = 0;
while (buffer[index] != 0 && (buffer[index] == 0x20 || buffer[index] == 0x09))
index++;
return &buffer[index];
}
static gchar *
xpm_skip_string(gchar * buffer)
{
gint32 index = 0;
while (buffer[index] != 0 && buffer[index] != 0x20 && buffer[index] != 0x09)
index++;
return &buffer[index];
}
/* Xlib crashed once at a color name lengths around 125 */
#define MAX_COLOR_LEN 120
static gchar *
xpm_extract_color(gchar * buffer)
{
gint counter, numnames;
gchar *ptr = NULL, ch, temp[128];
gchar color[MAX_COLOR_LEN], *retcol;
gint space;
counter = 0;
while (ptr == NULL) {
if (buffer[counter] == 'c') {
ch = buffer[counter + 1];
if (ch == 0x20 || ch == 0x09)
ptr = &buffer[counter + 1];
} else if (buffer[counter] == 0)
return NULL;
counter++;
}
ptr = xpm_skip_whitespaces(ptr);
if (ptr[0] == 0)
return NULL;
else if (ptr[0] == '#') {
counter = 1;
while (ptr[counter] != 0 &&
((ptr[counter] >= '0' && ptr[counter] <= '9') ||
(ptr[counter] >= 'a' && ptr[counter] <= 'f') ||
(ptr[counter] >= 'A' && ptr[counter] <= 'F')))
counter++;
retcol = g_new(gchar, counter + 1);
strncpy(retcol, ptr, counter);
retcol[counter] = 0;
return retcol;
}
color[0] = 0;
numnames = 0;
space = MAX_COLOR_LEN - 1;
while (space > 0) {
sscanf(ptr, "%127s", temp);
if (((gint) ptr[0] == 0) ||
(strcmp("s", temp) == 0) || (strcmp("m", temp) == 0) ||
(strcmp("g", temp) == 0) || (strcmp("g4", temp) == 0)) {
break;
} else {
if (numnames > 0) {
space -= 1;
strcat(color, " ");
}
strncat(color, temp, space);
space -= MIN(space, strlen(temp));
ptr = xpm_skip_string(ptr);
ptr = xpm_skip_whitespaces(ptr);
numnames++;
}
}
retcol = g_strdup(color);
return retcol;
}
/* (almost) direct copy from gdkpixmap.c... loads an XPM from a file */
static gchar *
file_buffer(enum buf_op op, gpointer handle)
{
struct file_handle *h = handle;
switch (op) {
case op_header:
if (xpm_seek_string(h->infile, "XPM", FALSE) != TRUE)
break;
if (xpm_seek_char(h->infile, '{') != TRUE)
break;
/* Fall through to the next xpm_seek_char. */
case op_cmap:
xpm_seek_char(h->infile, '"');
fseek(h->infile, -1, SEEK_CUR);
/* Fall through to the xpm_read_string. */
case op_body:
xpm_read_string(h->infile, &h->buffer, &h->buffer_size);
return h->buffer;
}
return NULL;
}
/* This reads from memory */
static gchar *
mem_buffer(enum buf_op op, gpointer handle)
{
struct mem_handle *h = handle;
switch (op) {
case op_header:
case op_cmap:
case op_body:
if (h->data[h->offset])
return h->data[h->offset++];
}
return NULL;
}
/* This function does all the work. */
static GdkPixBuf *
_pixbuf_create_from_xpm(gchar * (*get_buf) (enum buf_op op, gpointer handle),
gpointer handle)
{
gint w, h, n_col, cpp;
gint cnt, xcnt, ycnt, wbytes, n, ns;
gint is_trans = FALSE;
gchar *buffer, *name_buf;
gchar pixel_str[32];
GHashTable *color_hash;
_XPMColor *colors, *color, *fallbackcolor;
art_u8 *pixels, *pixtmp;
GdkPixBuf *pixbuf;
buffer = (*get_buf) (op_header, handle);
if (!buffer) {
g_warning("No XPM header found");
return NULL;
}
sscanf(buffer, "%d %d %d %d", &w, &h, &n_col, &cpp);
if (cpp >= 32) {
g_warning("XPM has more than 31 chars per pixel.");
return NULL;
}
/* The hash is used for fast lookups of color from chars */
color_hash = g_hash_table_new(g_str_hash, g_str_equal);
name_buf = g_new(gchar, n_col * (cpp + 1));
colors = g_new(_XPMColor, n_col);
for (cnt = 0; cnt < n_col; cnt++) {
gchar *color_name;
buffer = (*get_buf) (op_cmap, handle);
if (!buffer) {
g_warning("Can't load XPM colormap");
g_free(name_buf);
g_free(colors);
return NULL;
}
color = &colors[cnt];
color->color_string = &name_buf[cnt * (cpp + 1)];
strncpy(color->color_string, buffer, cpp);
color->color_string[cpp] = 0;
buffer += strlen(color->color_string);
color->transparent = FALSE;
color_name = xpm_extract_color(buffer);
if ((!color_name) || (g_strcasecmp(color_name, "None") == 0)
|| (gdk_color_parse(color_name, &color->color) == FALSE)) {
color->transparent = TRUE;
is_trans = TRUE;
}
g_free(color_name);
g_hash_table_insert(color_hash, color->color_string, color);
if (cnt == 0)
fallbackcolor = color;
}
if (is_trans)
pixels = art_alloc(w * h * 4);
else
pixels = art_alloc(w * h * 3);
if (!pixels) {
g_warning("XPM: Cannot alloc ArtBuf");
g_hash_table_destroy(color_hash);
g_free(colors);
g_free(name_buf);
return NULL;
}
wbytes = w * cpp;
pixtmp = pixels;
for (ycnt = 0; ycnt < h; ycnt++) {
buffer = (*get_buf) (op_body, handle);
if ((!buffer) || (strlen(buffer) < wbytes))
continue;
for (n = 0, cnt = 0, xcnt = 0; n < wbytes; n += cpp, xcnt++) {
strncpy(pixel_str, &buffer[n], cpp);
pixel_str[cpp] = 0;
ns = 0;
color = g_hash_table_lookup(color_hash, pixel_str);
/* Bad XPM...punt */
if (!color)
color = fallbackcolor;
pixtmp[0] = color->color.red;
pixtmp[1] = color->color.green;
pixtmp[2] = color->color.blue;
if ((is_trans) && (color->transparent)) {
pixtmp[3] = 0;
pixtmp++;
} else if (is_trans) {
pixtmp[3] = 0xFF;
pixtmp++;
}
pixtmp += 3;
}
}
/* Ok, now stuff the GdkPixBuf with goodies */
pixbuf = g_new(GdkPixBuf, 1);
if (is_trans)
pixbuf->art_pixbuf = art_pixbuf_new_rgba(pixels, w, h, (w * 4));
else
pixbuf->art_pixbuf = art_pixbuf_new_rgb(pixels, w, h, (w * 3));
/* Ok, I'm anal...shoot me */
if (!(pixbuf->art_pixbuf))
return NULL;
pixbuf->ref_count = 0;
pixbuf->unref_func = NULL;
g_hash_table_destroy(color_hash);
g_free(colors);
g_free(name_buf);
return pixbuf;
}
/* Shared library entry point for file loading */
GdkPixBuf *image_load(FILE * f)
{
GdkPixBuf *pixbuf;
struct file_handler h;
g_return_val_if_fail(f != NULL, NULL);
h = g_new(file_handler, 1);
h.infile = f;
pixbuf = _pixbuf_create_from_xpm(file_buffer, &h);
g_free(h);
return pixbuf;
}