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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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@ -24,8 +39,10 @@ GdkPixBuf *image_load(FILE * f)
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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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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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@ -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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@ -23,28 +36,25 @@ GdkPixBuf *image_load(FILE * f)
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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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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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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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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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@ -91,17 +101,16 @@ GdkPixBuf *image_load(FILE * f)
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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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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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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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@ -120,13 +129,13 @@ GdkPixBuf *image_load(FILE * f)
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temp = pixels;
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for (y = 0; y < h; y++) {
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(png_bytep)rowdata = rows[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)];
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temp[1] = rowdata[(x*bpp)+1];
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temp[2] = rowdata[(x*bpp)+2];
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temp[0] = rowdata[(x * bpp)];
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temp[1] = rowdata[(x * bpp) + 1];
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temp[2] = rowdata[(x * bpp) + 2];
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if (bpp == 4)
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temp[3] = rowdata[(x*bpp)+3];
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temp[3] = rowdata[(x * bpp) + 3];
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temp += bpp;
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}
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g_free(rows[y]);
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@ -137,9 +146,9 @@ GdkPixBuf *image_load(FILE * f)
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pixbuf = g_new(GdkPixBuf, 1);
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if (ctype & PNG_COLOR_MASK_ALPHA)
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pixbuf->art_pixbuf = art_pixbuf_new_rgba (pixels, w, h, (w*4));
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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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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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436
gdk-pixbuf/io-xpm.c
Normal file
436
gdk-pixbuf/io-xpm.c
Normal file
@ -0,0 +1,436 @@
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/*
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* io-xpm.c: GdkPixBuf I/O for XPM 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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* 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 <string.h>
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#include <glib.h>
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/* We need gdk.h since we might need to parse X color names */
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#include <gdk/gdk.h>
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#include "gdk-pixbuf.h"
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/*#include "gdk-pixbuf-io.h" */
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/* I have must have done something to deserve this.
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* XPM is such a crappy format to handle.
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* This code is an ugly hybred from gdkpixmap.c
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* modified to respect transparent colors.
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* It's still a mess, though.
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*/
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enum buf_op {
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op_header,
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op_cmap,
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op_body
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};
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typedef struct {
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gchar *color_string;
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GdkColor color;
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gint transparent;
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} _XPMColor;
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struct file_handle {
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FILE *infile;
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gchar *buffer;
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guint buffer_size;
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};
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struct mem_handle {
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gchar **data;
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int offset;
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};
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static gint
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xpm_seek_string(FILE * infile,
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const gchar * str,
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gint skip_comments)
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{
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char instr[1024];
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while (!feof(infile)) {
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fscanf(infile, "%1023s", instr);
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if (skip_comments == TRUE && strcmp(instr, "/*") == 0) {
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fscanf(infile, "%1023s", instr);
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while (!feof(infile) && strcmp(instr, "*/") != 0)
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fscanf(infile, "%1023s", instr);
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fscanf(infile, "%1023s", instr);
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}
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if (strcmp(instr, str) == 0)
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return TRUE;
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}
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return FALSE;
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}
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static gint
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xpm_seek_char(FILE * infile,
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gchar c)
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{
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gint b, oldb;
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while ((b = getc(infile)) != EOF) {
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if (c != b && b == '/') {
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b = getc(infile);
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if (b == EOF)
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return FALSE;
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else if (b == '*') { /* we have a comment */
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b = -1;
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do {
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oldb = b;
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b = getc(infile);
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if (b == EOF)
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return FALSE;
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}
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while (!(oldb == '*' && b == '/'));
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}
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} else if (c == b)
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return TRUE;
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}
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return FALSE;
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}
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static gint
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xpm_read_string(FILE * infile,
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gchar ** buffer,
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guint * buffer_size)
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{
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gint c;
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guint cnt = 0, bufsiz, ret = FALSE;
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gchar *buf;
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buf = *buffer;
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bufsiz = *buffer_size;
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if (buf == NULL) {
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bufsiz = 10 * sizeof(gchar);
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buf = g_new(gchar, bufsiz);
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}
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do
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c = getc(infile);
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while (c != EOF && c != '"');
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if (c != '"')
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goto out;
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while ((c = getc(infile)) != EOF) {
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if (cnt == bufsiz) {
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guint new_size = bufsiz * 2;
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if (new_size > bufsiz)
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bufsiz = new_size;
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else
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goto out;
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buf = (gchar *) g_realloc(buf, bufsiz);
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buf[bufsiz - 1] = '\0';
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}
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if (c != '"')
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buf[cnt++] = c;
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else {
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buf[cnt] = 0;
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ret = TRUE;
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break;
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}
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}
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out:
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buf[bufsiz - 1] = '\0'; /* ensure null termination for errors */
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*buffer = buf;
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*buffer_size = bufsiz;
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return ret;
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}
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static gchar *
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xpm_skip_whitespaces(gchar * buffer)
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{
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gint32 index = 0;
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while (buffer[index] != 0 && (buffer[index] == 0x20 || buffer[index] == 0x09))
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index++;
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return &buffer[index];
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}
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static gchar *
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xpm_skip_string(gchar * buffer)
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{
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gint32 index = 0;
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while (buffer[index] != 0 && buffer[index] != 0x20 && buffer[index] != 0x09)
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index++;
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return &buffer[index];
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}
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/* Xlib crashed once at a color name lengths around 125 */
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#define MAX_COLOR_LEN 120
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static gchar *
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xpm_extract_color(gchar * buffer)
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{
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gint counter, numnames;
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gchar *ptr = NULL, ch, temp[128];
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gchar color[MAX_COLOR_LEN], *retcol;
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gint space;
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counter = 0;
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while (ptr == NULL) {
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if (buffer[counter] == 'c') {
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ch = buffer[counter + 1];
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if (ch == 0x20 || ch == 0x09)
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ptr = &buffer[counter + 1];
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} else if (buffer[counter] == 0)
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return NULL;
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counter++;
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}
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ptr = xpm_skip_whitespaces(ptr);
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if (ptr[0] == 0)
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return NULL;
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else if (ptr[0] == '#') {
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counter = 1;
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while (ptr[counter] != 0 &&
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((ptr[counter] >= '0' && ptr[counter] <= '9') ||
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(ptr[counter] >= 'a' && ptr[counter] <= 'f') ||
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(ptr[counter] >= 'A' && ptr[counter] <= 'F')))
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counter++;
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retcol = g_new(gchar, counter + 1);
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strncpy(retcol, ptr, counter);
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retcol[counter] = 0;
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return retcol;
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}
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color[0] = 0;
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numnames = 0;
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space = MAX_COLOR_LEN - 1;
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while (space > 0) {
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sscanf(ptr, "%127s", temp);
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if (((gint) ptr[0] == 0) ||
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(strcmp("s", temp) == 0) || (strcmp("m", temp) == 0) ||
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(strcmp("g", temp) == 0) || (strcmp("g4", temp) == 0)) {
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break;
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} else {
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if (numnames > 0) {
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space -= 1;
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strcat(color, " ");
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}
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strncat(color, temp, space);
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space -= MIN(space, strlen(temp));
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ptr = xpm_skip_string(ptr);
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ptr = xpm_skip_whitespaces(ptr);
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numnames++;
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}
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}
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retcol = g_strdup(color);
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return retcol;
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}
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/* (almost) direct copy from gdkpixmap.c... loads an XPM from a file */
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static gchar *
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file_buffer(enum buf_op op, gpointer handle)
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{
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struct file_handle *h = handle;
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switch (op) {
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case op_header:
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if (xpm_seek_string(h->infile, "XPM", FALSE) != TRUE)
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break;
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|
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if (xpm_seek_char(h->infile, '{') != TRUE)
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break;
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/* Fall through to the next xpm_seek_char. */
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case op_cmap:
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xpm_seek_char(h->infile, '"');
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fseek(h->infile, -1, SEEK_CUR);
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/* Fall through to the xpm_read_string. */
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case op_body:
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xpm_read_string(h->infile, &h->buffer, &h->buffer_size);
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return h->buffer;
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}
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return NULL;
|
||||
}
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||||
|
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/* This reads from memory */
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static gchar *
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mem_buffer(enum buf_op op, gpointer handle)
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{
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struct mem_handle *h = handle;
|
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switch (op) {
|
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case op_header:
|
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case op_cmap:
|
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case op_body:
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if (h->data[h->offset])
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return h->data[h->offset++];
|
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}
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return NULL;
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}
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/* This function does all the work. */
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|
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static GdkPixBuf *
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_pixbuf_create_from_xpm(gchar * (*get_buf) (enum buf_op op, gpointer handle),
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gpointer handle)
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{
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gint w, h, n_col, cpp;
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gint cnt, xcnt, ycnt, wbytes, n, ns;
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gint is_trans = FALSE;
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gchar *buffer, *name_buf;
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gchar pixel_str[32];
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GHashTable *color_hash;
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_XPMColor *colors, *color, *fallbackcolor;
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art_u8 *pixels, *pixtmp;
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GdkPixBuf *pixbuf;
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|
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buffer = (*get_buf) (op_header, handle);
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if (!buffer) {
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g_warning("No XPM header found");
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return NULL;
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}
|
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sscanf(buffer, "%d %d %d %d", &w, &h, &n_col, &cpp);
|
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if (cpp >= 32) {
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g_warning("XPM has more than 31 chars per pixel.");
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return NULL;
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}
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/* The hash is used for fast lookups of color from chars */
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color_hash = g_hash_table_new(g_str_hash, g_str_equal);
|
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|
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name_buf = g_new(gchar, n_col * (cpp + 1));
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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