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io-gif.c, io-png.c: Actually put the licencing terms in the code now...
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
parent
a0b1a437cc
commit
feb9789e64
@ -1,11 +1,26 @@
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/*
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* io-png.c: GdkPixBuf I/O for GIF files.
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* io-gif.c: GdkPixBuf I/O for GIF files.
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* ...second verse, same as the first...
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*
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* Author:
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* Mark Crichton <crichton@gimp.org>
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* Copyright (C) 1999 Mark Crichton
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* Author: Mark Crichton <crichton@gimp.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Cambridge, MA 02139, USA.
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*
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*/
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#include <config.h>
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#include <stdio.h>
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#include <glib.h>
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@ -16,141 +31,143 @@
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/* Shared library entry point */
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GdkPixBuf *image_load(FILE * f)
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{
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gint fn, is_trans, done;
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gint t_color = -1;
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gint w, h, i, j;
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art_u8 *pixels, *tmpptr;
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GifFileType *gif;
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GifRowType *rows;
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GifRecordType rec;
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ColorMapObject *cmap;
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int intoffset[] = {0, 4, 2, 1};
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int intjump[] = {8, 8, 4, 2};
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gint fn, is_trans, done;
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gint t_color = -1;
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gint w, h, i, j;
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art_u8 *pixels, *tmpptr;
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GifFileType *gif;
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GifRowType *rows;
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GifRecordType rec;
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ColorMapObject *cmap;
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int intoffset[] =
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{0, 4, 2, 1};
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int intjump[] =
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{8, 8, 4, 2};
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GdkPixBuf *pixbuf;
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GdkPixBuf *pixbuf;
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g_return_val_if_fail(f != NULL, NULL);
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g_return_val_if_fail(f != NULL, NULL);
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fn = fileno(f);
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gif = DGifOpenFileHandle(fn);
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fn = fileno(f);
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gif = DGifOpenFileHandle(fn);
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if (!gif) {
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g_error("DGifOpenFilehandle FAILED");
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if (!gif) {
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g_error("DGifOpenFilehandle FAILED");
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PrintGifError();
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return NULL;
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}
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/* Now we do the ungodly mess of loading a GIF image
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* I used to remember when I liked this file format...
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* of course, I still coded in assembler then.
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* This comes from gdk_imlib, with some cleanups.
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*/
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do {
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if (DGifGetRecordType(gif, &rec) == GIF_ERROR) {
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PrintGifError();
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rec = TERMINATE_RECORD_TYPE;
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}
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if ((rec == IMAGE_DESC_RECORD_TYPE) && (!done)) {
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if (DGifGetImageDesc(gif) == GIF_ERROR) {
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PrintGifError();
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rec = TERMINATE_RECORD_TYPE;
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}
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w = gif->Image.Width;
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h = gif->Image.Height;
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rows = g_malloc(h * sizeof(GifRowType *));
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if (!rows) {
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DGifCloseFile(gif);
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return NULL;
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}
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/* Now we do the ungodly mess of loading a GIF image
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* I used to remember when I liked this file format...
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* of course, I still coded in assembler then.
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* This comes from gdk_imlib, with some cleanups.
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*/
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do {
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if (DGifGetRecordType(gif, &rec) == GIF_ERROR) {
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PrintGifError();
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rec = TERMINATE_RECORD_TYPE;
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}
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for (i = 0; i < h; i++) {
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rows[i] = g_malloc(w * sizeof(GifPixelType));
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if (!rows[i]) {
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DGifCloseFile(gif);
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for (i = 0; i < h; i++)
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if (rows[i])
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g_free(rows[i]);
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free(rows);
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return NULL;
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}
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if ((rec == IMAGE_DESC_RECORD_TYPE) && (!done)) {
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if (DGifGetImageDesc(gif) == GIF_ERROR) {
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PrintGifError();
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rec = TERMINATE_RECORD_TYPE;
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}
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w = gif->Image.Width;
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h = gif->Image.Height;
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rows = g_malloc(h * sizeof(GifRowType *));
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if (!rows) {
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DGifCloseFile(gif);
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return NULL;
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}
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for (i = 0; i < h; i++) {
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rows[i] = g_malloc(w * sizeof(GifPixelType));
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if (!rows[i]) {
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DGifCloseFile(gif);
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for (i = 0; i < h; i++)
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if (rows[i])
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g_free(rows[i]);
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free(rows);
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return NULL;
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}
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}
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if (gif->Image.Interlace) {
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for (i = 0; i < 4; i++) {
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for (j = intoffset[i]; j < h; j += intjump[i])
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DGifGetLine(gif, rows[j], w);
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}
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} else {
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for (i = 0; i < h; i++)
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DGifGetLine(gif, rows[i], w);
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}
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done = TRUE;
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} else if (rec == EXTENSION_RECORD_TYPE) {
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gint ext_code;
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GifByteType *ext;
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DGifGetExtension(gif, &ext_code, &ext);
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while (ext) {
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if ((ext_code == GRAPHICS_EXT_FUNC_CODE) &&
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(ext[1] & 1) && (t_color < 0)) {
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is_trans = TRUE;
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t_color = (gint) ext[4];
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}
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ext = NULL;
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DGifGetExtensionNext(gif, &ext);
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}
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}
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if (gif->Image.Interlace) {
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for (i = 0; i < 4; i++) {
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for (j = intoffset[i]; j < h; j += intjump[i])
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DGifGetLine(gif, rows[j], w);
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}
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}
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while (rec != TERMINATE_RECORD_TYPE);
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} else {
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for (i = 0; i < h; i++)
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DGifGetLine(gif, rows[i], w);
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}
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done = TRUE;
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} else if (rec == EXTENSION_RECORD_TYPE) {
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gint ext_code;
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GifByteType *ext;
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/* Ok, we're loaded, now to convert from indexed -> RGB
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* with alpha if necessary
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*/
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if (is_trans)
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pixels = art_alloc(h * w * 4);
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else
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pixels = art_alloc(h * w * 3);
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tmpptr = pixels;
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if (!pixels)
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return NULL;
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/* The meat of the transformation */
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/* Get the right palette */
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cmap = (gif->Image.ColorMap ? gif->Image.ColorMap : gif->SColorMap);
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/* Unindex the data, and pack it in RGB(A) order.
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* Note for transparent GIFs, the alpha is set to 0
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* for the transparent color, and 0xFF for everything else.
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* I think that's right...
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*/
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for (i = 0; i < h; i++) {
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for (j = 0; j < w; j++) {
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tmpptr[0] = cmap->Colors[rows[i][j]].Red;
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tmpptr[1] = cmap->Colors[rows[i][j]].Green;
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tmpptr[2] = cmap->Colors[rows[i][j]].Blue;
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if (is_trans && (rows[i][j] == t_color))
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tmpptr[3] = 0;
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else
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tmpptr[3] = 0xFF;
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tmpptr += (is_trans ? 3 : 4);
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DGifGetExtension(gif, &ext_code, &ext);
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while (ext) {
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if ((ext_code == GRAPHICS_EXT_FUNC_CODE) &&
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(ext[1] & 1) && (t_color < 0)) {
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is_trans = TRUE;
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t_color = (gint) ext[4];
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}
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ext = NULL;
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DGifGetExtensionNext(gif, &ext);
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}
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}
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}
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while (rec != TERMINATE_RECORD_TYPE);
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/* Ok, now stuff the GdkPixBuf with goodies */
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/* Ok, we're loaded, now to convert from indexed -> RGB
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* with alpha if necessary
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*/
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pixbuf = g_new(GdkPixBuf, 1);
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if (is_trans)
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pixels = art_alloc(h * w * 4);
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else
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pixels = art_alloc(h * w * 3);
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tmpptr = pixels;
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if (is_trans)
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pixbuf->art_pixbuf = art_pixbuf_new_rgba(pixels, w, h, (w * 4));
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else
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pixbuf->art_pixbuf = art_pixbuf_new_rgb(pixels, w, h, (w * 3));
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if (!pixels)
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return NULL;
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/* Ok, I'm anal...shoot me */
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if (!(pixbuf->art_pixbuf))
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return NULL;
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pixbuf->ref_count = 0;
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pixbuf->unref_func = NULL;
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/* The meat of the transformation */
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/* Get the right palette */
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cmap = (gif->Image.ColorMap ? gif->Image.ColorMap : gif->SColorMap);
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return pixbuf;
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/* Unindex the data, and pack it in RGB(A) order.
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* Note for transparent GIFs, the alpha is set to 0
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* for the transparent color, and 0xFF for everything else.
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* I think that's right...
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*/
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for (i = 0; i < h; i++) {
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for (j = 0; j < w; j++) {
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tmpptr[0] = cmap->Colors[rows[i][j]].Red;
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tmpptr[1] = cmap->Colors[rows[i][j]].Green;
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tmpptr[2] = cmap->Colors[rows[i][j]].Blue;
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if (is_trans && (rows[i][j] == t_color))
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tmpptr[3] = 0;
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else
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tmpptr[3] = 0xFF;
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tmpptr += (is_trans ? 3 : 4);
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}
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}
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/* Ok, now stuff the GdkPixBuf with goodies */
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pixbuf = g_new(GdkPixBuf, 1);
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if (is_trans)
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pixbuf->art_pixbuf = art_pixbuf_new_rgba(pixels, w, h, (w * 4));
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else
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pixbuf->art_pixbuf = art_pixbuf_new_rgb(pixels, w, h, (w * 3));
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/* Ok, I'm anal...shoot me */
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if (!(pixbuf->art_pixbuf))
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return NULL;
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pixbuf->ref_count = 0;
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pixbuf->unref_func = NULL;
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return pixbuf;
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}
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@ -1,8 +1,21 @@
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/*
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* io-png.c: GdkPixBuf I/O for PNG files.
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* Copyright (C) 1999 Mark Crichton
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* Author: Mark Crichton <crichton@gimp.org>
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*
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* Author:
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* Mark Crichton <crichton@gimp.org>
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Cambridge, MA 02139, USA.
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*
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*/
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#include <config.h>
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@ -15,137 +28,133 @@
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/* Shared library entry point */
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GdkPixBuf *image_load(FILE * f)
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{
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png_structp png_ptr;
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png_infop info_ptr, end_info;
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gint i, depth, ctype, inttype, passes, bpp; /* bpp = BYTES/pixel */
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png_uint_32 w, h, x, y;
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png_bytepp rows;
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art_u8 *pixels, *temp, *rowdata;
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GdkPixBuf *pixbuf;
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png_structp png_ptr;
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png_infop info_ptr, end_info;
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gint i, depth, ctype, inttype, passes, bpp; /* bpp = BYTES/pixel */
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png_uint_32 w, h, x, y;
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png_bytepp rows;
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art_u8 *pixels, *temp, *rowdata;
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GdkPixBuf *pixbuf;
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g_return_val_if_fail (f != NULL, NULL);
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g_return_val_if_fail(f != NULL, NULL);
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png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, NULL, NULL,
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NULL);
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png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL,
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NULL);
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info_ptr = png_create_info_struct (png_ptr);
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if (!info_ptr) {
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png_destroy_read_struct(&png_ptr, NULL, NULL);
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return NULL;
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}
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end_info = png_create_info_struct (png_ptr);
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if (!end_info) {
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png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
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return NULL;
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}
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if (setjmp(png_ptr->jmpbuf)) {
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png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
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return NULL;
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}
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png_init_io(png_ptr, f);
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png_read_info(png_ptr, info_ptr);
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png_get_IHDR(png_ptr, info_ptr, &w, &h, &depth, &ctype, &inttype,
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NULL, NULL);
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/* Ok, we want to work with 24 bit images.
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* However, PNG can vary depth per channel.
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* So, we use the png_set_expand function to expand
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* everything into a format libart expects.
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* We also use png_set_strip_16 to reduce down to 8 bit/chan.
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*/
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if (ctype == PNG_COLOR_TYPE_PALETTE && depth <= 8)
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png_set_expand(png_ptr);
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if (ctype == PNG_COLOR_TYPE_GRAY && depth < 8)
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png_set_expand(png_ptr);
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if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
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png_set_expand(png_ptr);
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if (depth == 16)
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png_set_strip_16(png_ptr);
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/* We also have png "packing" bits into bytes if < 8 */
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if (depth < 8)
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png_set_packing(png_ptr);
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/* Lastly, if the PNG is greyscale, convert to RGB */
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if (ctype == PNG_COLOR_TYPE_GRAY || ctype == PNG_COLOR_TYPE_GRAY_ALPHA)
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png_set_gray_to_rgb(png_ptr);
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/* ...and if we're interlaced... */
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passes = png_set_interlace_handling(png_ptr);
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/* Update our info structs */
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png_read_update_info(png_ptr, info_ptr);
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/* Allocate some memory and set up row array */
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/* This "inhales vigirously"... */
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if (ctype & PNG_COLOR_MASK_ALPHA)
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bpp = 4;
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else
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bpp = 3;
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pixels = art_alloc(w*h*bpp);
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rows = g_malloc(h*sizeof(png_bytep));
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if ((!pixels) || (!rows)) {
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png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
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return NULL;
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}
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/* Icky code, but it has to be done... */
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for (i = 0; i < h; i++) {
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if ((rows[i] = g_malloc(w*sizeof(art_u8)*bpp)) == NULL) {
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int n;
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for (n = 0; n < i; n++)
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g_free(rows[i]);
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g_free(rows);
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png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
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return NULL;
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}
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}
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/* And we FINALLY get here... */
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png_read_image(png_ptr, rows);
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info_ptr = png_create_info_struct(png_ptr);
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if (!info_ptr) {
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png_destroy_read_struct(&png_ptr, NULL, NULL);
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return NULL;
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}
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end_info = png_create_info_struct(png_ptr);
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if (!end_info) {
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png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
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return NULL;
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}
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if (setjmp(png_ptr->jmpbuf)) {
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png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
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/* Now stuff the bytes into pixels & free rows[y] */
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temp = pixels;
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return NULL;
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}
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png_init_io(png_ptr, f);
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png_read_info(png_ptr, info_ptr);
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for (y = 0; y < h; y++) {
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(png_bytep)rowdata = rows[y];
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for (x = 0; x < w; x++) {
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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]);
|
||||
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;
|
||||
}
|
||||
g_free(rows);
|
||||
}
|
||||
|
||||
/* Return the GdkPixBuf */
|
||||
pixbuf = g_new(GdkPixBuf, 1);
|
||||
/* And we FINALLY get here... */
|
||||
png_read_image(png_ptr, rows);
|
||||
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
|
||||
|
||||
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));
|
||||
/* Now stuff the bytes into pixels & free rows[y] */
|
||||
|
||||
/* Ok, I'm anal...shoot me */
|
||||
if (!(pixbuf->art_pixbuf))
|
||||
return NULL;
|
||||
pixbuf->ref_count = 0;
|
||||
pixbuf->unref_func = NULL;
|
||||
temp = pixels;
|
||||
|
||||
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
436
gdk-pixbuf/io-xpm.c
Normal 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;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user