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d99bd97fe8
2001-12-13 Sebastian Wilhelmi <wilhelmi@ira.uka.de> * gdk-pixbuf-animation.c, gdk-pixbuf-loader.c, gdk-pixpuf.c, io-gif-animation.c, io-gif.c, io-tiff.c, test-loaders.c: Remove assorted G_OBJECT casts where unnecessary. * gdk-pixbuf-loader.c: Call g_object_ref and g_object_unref instead of gdk_pixbuf_animation_ref and gdk_pixbuf_animation_unref resp. * gdk-pixbuf-csource.c, io-bmp.c, io-gif-animation.c, io-ico.c, io-jpeg.c, io-png.c, io-pnm.c, io-ras.c, io-tga.c, io-wbmp.c, io-xbm.c, io-xpm.c, test-gdk-pixbuf.c: Dito for gdk_pixbuf_ref and gdk_pixbuf_unref. * Makefile.am, pixops/Makefile.am: Compile everything with -DG_DISABLE_DEPRECATED -DGDK_PIXBUF_DISABLE_DEPRECATED * gdk-pixdata.c: Use g_ascii_strup() instead of g_strup(). * io-xpm.c: Use g_ascii_strcasecmp() instead of g_strcasecmp(). * demos/testpixbuf-drawable.c, demos/testpixbuf-save.c, demos/testpixbuf-scale.c, demos/testpixbuf.c: Call g_object_ref and g_object_unref instead of gdk_pixbuf_ref and gdk_pixbuf_unref resp.
1175 lines
28 KiB
C
1175 lines
28 KiB
C
/*
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* GdkPixbuf library - TGA image loader
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* Copyright (C) 1999 Nicola Girardi <nikke@swlibero.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
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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*/
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/*
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* Some NOTES about the TGA loader (2001/06/07, nikke@swlibero.org)
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*
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* - The module doesn't currently provide support for TGA images where the
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* order of the pixels isn't left-to-right and top-to-bottom. I plan to
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* add support for those files as soon as I get one of them. I haven't
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* run into one yet. (And I don't seem to be able to create it with GIMP.)
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*
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* - The TGAFooter isn't present in all TGA files. In fact, there's an older
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* format specification, still in use, which doesn't cover the TGAFooter.
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* Actually, most TGA files I have are of the older type. Anyway I put the
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* struct declaration here for completeness.
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*
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* - Error handling was designed to be very paranoid.
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*/
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#include <stdio.h>
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#include <string.h>
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#include "gdk-pixbuf.h"
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#include "gdk-pixbuf-io.h"
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#include "gdk-pixbuf-private.h"
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#define TGA_INTERLEAVE_MASK 0xc0
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#define TGA_INTERLEAVE_NONE 0x00
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#define TGA_INTERLEAVE_2WAY 0x40
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#define TGA_INTERLEAVE_4WAY 0x80
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#define TGA_ORIGIN_MASK 0x30
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#define TGA_ORIGIN_LEFT 0x00
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#define TGA_ORIGIN_RIGHT 0x10
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#define TGA_ORIGIN_LOWER 0x00
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#define TGA_ORIGIN_UPPER 0x20
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enum {
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TGA_TYPE_NODATA = 0,
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TGA_TYPE_PSEUDOCOLOR = 1,
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TGA_TYPE_TRUECOLOR = 2,
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TGA_TYPE_GRAYSCALE = 3,
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TGA_TYPE_RLE_PSEUDOCOLOR = 9,
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TGA_TYPE_RLE_TRUECOLOR = 10,
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TGA_TYPE_RLE_GRAYSCALE = 11
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};
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#define LE16(p) ((p)[0] + ((p)[1] << 8))
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typedef struct _IOBuffer IOBuffer;
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typedef struct _TGAHeader TGAHeader;
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typedef struct _TGAFooter TGAFooter;
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typedef struct _TGAColormap TGAColormap;
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typedef struct _TGAColor TGAColor;
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typedef struct _TGAContext TGAContext;
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struct _TGAHeader {
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guint8 infolen;
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guint8 has_cmap;
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guint8 type;
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guint8 cmap_start[2];
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guint8 cmap_n_colors[2];
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guint8 cmap_bpp;
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guint8 x_origin[2];
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guint8 y_origin[2];
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guint8 width[2];
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guint8 height[2];
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guint8 bpp;
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guint8 flags;
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};
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struct _TGAFooter {
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guint32 extension_area_offset;
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guint32 developer_directory_offset;
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/* Standard TGA signature, "TRUEVISION-XFILE.\0". */
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union {
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gchar sig_full[18];
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struct {
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gchar sig_chunk[16];
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gchar dot, null;
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} sig_struct;
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} sig;
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};
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struct _TGAColormap {
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gint size;
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TGAColor *cols;
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};
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struct _TGAColor {
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guchar r, g, b, a;
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};
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struct _TGAContext {
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TGAHeader *hdr;
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guint rowstride;
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guint completed_lines;
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gboolean run_length_encoded;
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TGAColormap *cmap;
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guint cmap_size;
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GdkPixbuf *pbuf;
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guint pbuf_bytes;
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guint pbuf_bytes_done;
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guchar *pptr;
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IOBuffer *in;
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gboolean skipped_info;
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gboolean prepared;
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gboolean done;
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ModulePreparedNotifyFunc pfunc;
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ModuleUpdatedNotifyFunc ufunc;
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gpointer udata;
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};
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struct _IOBuffer {
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guchar *data;
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guint size;
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};
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static IOBuffer *io_buffer_new(GError **err)
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{
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IOBuffer *buffer;
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buffer = g_try_malloc(sizeof(IOBuffer));
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if (!buffer) {
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g_set_error(err, GDK_PIXBUF_ERROR,
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GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
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_("Can't allocate memory for IOBuffer struct"));
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return NULL;
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}
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buffer->data = NULL;
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buffer->size = 0;
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return buffer;
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}
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static IOBuffer *io_buffer_append(IOBuffer *buffer,
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const guchar *data, guint len,
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GError **err)
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{
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if (!buffer)
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return NULL;
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if (!buffer->data) {
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buffer->data = g_try_malloc(len);
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if (!buffer->data) {
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g_set_error(err, GDK_PIXBUF_ERROR,
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GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
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_("Can't allocate memory for IOBuffer data"));
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g_free(buffer);
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return NULL;
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}
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g_memmove(buffer->data, data, len);
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buffer->size = len;
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} else {
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buffer->data = g_try_realloc(buffer->data, buffer->size + len);
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if (!buffer->data) {
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g_set_error(err, GDK_PIXBUF_ERROR,
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GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
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_("Can't realloc IOBuffer data"));
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g_free(buffer);
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return NULL;
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}
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g_memmove(&buffer->data[buffer->size], data, len);
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buffer->size += len;
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}
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return buffer;
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}
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static IOBuffer *io_buffer_free_segment(IOBuffer *buffer,
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guint count,
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GError **err)
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{
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g_return_val_if_fail(buffer != NULL, NULL);
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g_return_val_if_fail(buffer->data != NULL, NULL);
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if (count == buffer->size) {
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g_free(buffer->data);
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buffer->data = NULL;
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buffer->size = 0;
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} else {
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guchar *new_buf;
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guint new_size;
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new_size = buffer->size - count;
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new_buf = g_try_malloc(new_size);
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if (!new_buf) {
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g_set_error(err, GDK_PIXBUF_ERROR,
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GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
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_("Can't allocate temporary IOBuffer data"));
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g_free(buffer->data);
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g_free(buffer);
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return NULL;
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}
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g_memmove(new_buf, &buffer->data[count], new_size);
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g_free(buffer->data);
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buffer->data = new_buf;
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buffer->size = new_size;
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}
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return buffer;
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}
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static void io_buffer_free(IOBuffer *buffer)
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{
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g_return_if_fail(buffer != NULL);
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if (buffer->data)
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g_free(buffer->data);
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g_free(buffer);
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}
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static void free_buffer(guchar *pixels, gpointer data)
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{
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g_free(pixels);
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}
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static gboolean fread_check(gpointer dest,
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size_t size, size_t count,
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FILE *f, GError **err)
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{
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if (fread(dest, size, count, f) != count) {
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g_set_error(err, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED,
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_("fread() failed -- premature end-of-file probably encountered"));
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return FALSE;
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}
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return TRUE;
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}
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static gboolean fseek_check(FILE *f, glong offset, gint whence, GError **err)
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{
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if (fseek(f, offset, whence) != 0) {
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g_set_error(err, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED,
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_("fseek() failed -- premature end-of-file probably encountered"));
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return FALSE;
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}
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return TRUE;
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}
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static gboolean fill_in_context(TGAContext *ctx, GError **err)
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{
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gboolean alpha;
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g_return_val_if_fail(ctx != NULL, FALSE);
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ctx->run_length_encoded =
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((ctx->hdr->type == TGA_TYPE_RLE_PSEUDOCOLOR)
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|| (ctx->hdr->type == TGA_TYPE_RLE_TRUECOLOR)
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|| (ctx->hdr->type == TGA_TYPE_RLE_GRAYSCALE));
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if (ctx->hdr->has_cmap)
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ctx->cmap_size = ((ctx->hdr->cmap_bpp + 7) >> 3) *
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LE16(ctx->hdr->cmap_n_colors);
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alpha = ((ctx->hdr->bpp == 32) ||
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(ctx->hdr->has_cmap && (ctx->hdr->cmap_bpp == 32)));
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ctx->pbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, alpha, 8,
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LE16(ctx->hdr->width),
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LE16(ctx->hdr->height));
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if (!ctx->pbuf) {
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g_set_error(err, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
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_("Can't allocate new pixbuf"));
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return FALSE;
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}
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ctx->pbuf_bytes = ctx->pbuf->rowstride * ctx->pbuf->height;
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ctx->pptr = ctx->pbuf->pixels;
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if ((ctx->hdr->type == TGA_TYPE_PSEUDOCOLOR) ||
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(ctx->hdr->type == TGA_TYPE_GRAYSCALE))
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ctx->rowstride = ctx->pbuf->width;
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else if (ctx->hdr->type == TGA_TYPE_TRUECOLOR)
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ctx->rowstride = ctx->pbuf->rowstride;
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ctx->completed_lines = 0;
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return TRUE;
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}
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static void parse_data_for_row_pseudocolor(TGAContext *ctx)
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{
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guchar *s = ctx->in->data;
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guint upper_bound = ctx->pbuf->width;
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for (; upper_bound; upper_bound--, s++) {
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*ctx->pptr++ = ctx->cmap->cols[*s].r;
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*ctx->pptr++ = ctx->cmap->cols[*s].g;
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*ctx->pptr++ = ctx->cmap->cols[*s].b;
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if (ctx->hdr->cmap_bpp == 32)
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*ctx->pptr++ = ctx->cmap->cols[*s].a;
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}
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ctx->pbuf_bytes_done += ctx->pbuf->n_channels * ctx->pbuf->width;
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if (ctx->pbuf_bytes_done == ctx->pbuf_bytes)
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ctx->done = TRUE;
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}
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static void swap_channels(TGAContext *ctx)
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{
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register guchar swap;
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register guint count;
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for (count = ctx->pbuf->width; count; count--) {
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swap = ctx->pptr[0];
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ctx->pptr[0] = ctx->pptr[2];
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ctx->pptr[2] = swap;
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ctx->pptr += ctx->pbuf->n_channels;
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}
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}
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static void parse_data_for_row_truecolor(TGAContext *ctx)
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{
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g_memmove(ctx->pptr, ctx->in->data, ctx->pbuf->rowstride);
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swap_channels(ctx);
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ctx->pbuf_bytes_done += ctx->pbuf->rowstride;
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if (ctx->pbuf_bytes_done == ctx->pbuf_bytes)
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ctx->done = TRUE;
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}
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static void parse_data_for_row_grayscale(TGAContext *ctx)
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{
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guchar *s = ctx->in->data;
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guint upper_bound = ctx->pbuf->width;
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for (; upper_bound; upper_bound--) {
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ctx->pptr[0] = ctx->pptr[1] = ctx->pptr[2] = *s++;
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ctx->pptr += 3;
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}
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ctx->pbuf_bytes_done = ctx->pbuf->width * 3;
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if (ctx->pbuf_bytes_done == ctx->pbuf_bytes)
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ctx->done = TRUE;
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}
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static gboolean parse_data_for_row(TGAContext *ctx, GError **err)
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{
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if (ctx->hdr->type == TGA_TYPE_PSEUDOCOLOR)
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parse_data_for_row_pseudocolor(ctx);
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else if (ctx->hdr->type == TGA_TYPE_TRUECOLOR)
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parse_data_for_row_truecolor(ctx);
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else if (ctx->hdr->type == TGA_TYPE_GRAYSCALE)
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parse_data_for_row_grayscale(ctx);
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ctx->in = io_buffer_free_segment(ctx->in, ctx->rowstride, err);
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if (!ctx->in)
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return FALSE;
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(*ctx->ufunc) (ctx->pbuf, 0,
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(ctx->pbuf_bytes_done / ctx->pbuf->rowstride) - 1,
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ctx->pbuf->width, 1, ctx->udata);
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return TRUE;
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}
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static void write_rle_data(TGAContext *ctx, TGAColor *color, guint *rle_count)
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{
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ctx->pbuf_bytes_done += ctx->pbuf->n_channels * (*rle_count);
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for (; *rle_count; (*rle_count)--) {
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g_memmove(ctx->pptr, (guchar *) color, ctx->pbuf->n_channels);
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ctx->pptr += ctx->pbuf->n_channels;
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}
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}
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static guint parse_rle_data_pseudocolor(TGAContext *ctx)
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{
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guint rle_num, raw_num;
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guchar *s, tag;
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guint n;
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g_return_val_if_fail(ctx->in->size > 0, 0);
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s = ctx->in->data;
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for (n = 0; n < ctx->in->size; ) {
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tag = *s;
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s++, n++;
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if (tag & 0x80) {
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if (n == ctx->in->size) {
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return --n;
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} else {
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rle_num = (tag & 0x7f) + 1;
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write_rle_data(ctx, &ctx->cmap->cols[*s], &rle_num);
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s++, n++;
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}
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} else {
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raw_num = tag + 1;
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if (n + raw_num >= ctx->in->size) {
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return --n;
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} else {
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for (; raw_num; raw_num--) {
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*ctx->pptr++ =
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ctx->cmap->cols[*s].r;
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*ctx->pptr++ =
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ctx->cmap->cols[*s].g;
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*ctx->pptr++ =
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ctx->cmap->cols[*s].b;
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if (ctx->pbuf->n_channels == 4)
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*ctx->pptr++ = ctx->cmap->cols[*s].a;
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s++, n++;
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ctx->pbuf_bytes_done += ctx->pbuf->n_channels;
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}
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}
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}
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}
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if (ctx->pbuf_bytes_done == ctx->pbuf_bytes)
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ctx->done = TRUE;
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return n;
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}
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static void swap_channels_rle(TGAContext *ctx, guint count)
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{
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register guchar swap;
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for (; count; count--) {
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swap = ctx->pptr[0];
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ctx->pptr[0] = ctx->pptr[2];
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ctx->pptr[2] = swap;
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ctx->pptr += ctx->pbuf->n_channels;
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}
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}
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static guint parse_rle_data_truecolor(TGAContext *ctx)
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{
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TGAColor col;
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guint rle_num, raw_num;
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guchar *s, tag;
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guint n = 0;
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g_return_val_if_fail(ctx->in->size > 0, 0);
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s = ctx->in->data;
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for (n = 0; n < ctx->in->size; ) {
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tag = *s;
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s++, n++;
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if (tag & 0x80) {
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if (n + ctx->pbuf->n_channels >= ctx->in->size) {
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return --n;
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} else {
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rle_num = (tag & 0x7f) + 1;
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col.b = *s++;
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col.g = *s++;
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col.r = *s++;
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if (ctx->hdr->bpp == 32)
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col.a = *s++;
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write_rle_data(ctx, &col, &rle_num);
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n += ctx->pbuf->n_channels;
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}
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} else {
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raw_num = tag + 1;
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if (n + (raw_num * ctx->pbuf->n_channels) >= ctx->in->size) {
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return --n;
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} else {
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g_memmove(ctx->pptr, s, raw_num * ctx->pbuf->n_channels);
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swap_channels_rle(ctx, raw_num);
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s += raw_num * ctx->pbuf->n_channels;
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n += raw_num * ctx->pbuf->n_channels;
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ctx->pbuf_bytes_done += raw_num * ctx->pbuf->n_channels;
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}
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}
|
|
}
|
|
if (ctx->pbuf_bytes_done == ctx->pbuf_bytes)
|
|
ctx->done = TRUE;
|
|
return n;
|
|
}
|
|
|
|
static guint parse_rle_data_grayscale(TGAContext *ctx)
|
|
{
|
|
TGAColor tone;
|
|
guint rle_num, raw_num;
|
|
guchar *s, tag;
|
|
guint n;
|
|
|
|
g_return_val_if_fail(ctx->in->size > 0, 0);
|
|
s = ctx->in->data;
|
|
|
|
for (n = 0; n < ctx->in->size; ) {
|
|
tag = *s;
|
|
s++, n++;
|
|
if (tag & 0x80) {
|
|
if (n == ctx->in->size) {
|
|
return --n;
|
|
} else {
|
|
rle_num = (tag & 0x7f) + 1;
|
|
tone.r = tone.g = tone.b = *s;
|
|
s++, n++;
|
|
write_rle_data(ctx, &tone, &rle_num);
|
|
}
|
|
} else {
|
|
raw_num = tag + 1;
|
|
if (n + raw_num >= ctx->in->size) {
|
|
return --n;
|
|
} else {
|
|
for (; raw_num; raw_num--) {
|
|
ctx->pptr[0] = ctx->pptr[1] = ctx->pptr[2] = *s;
|
|
s++, n++;
|
|
ctx->pptr += 3;
|
|
ctx->pbuf_bytes_done += 3;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (ctx->pbuf_bytes_done == ctx->pbuf_bytes)
|
|
ctx->done = TRUE;
|
|
return n;
|
|
}
|
|
|
|
static gboolean parse_rle_data(TGAContext *ctx, GError **err)
|
|
{
|
|
guint count = 0;
|
|
guint pbuf_count = 0;
|
|
if (ctx->hdr->type == TGA_TYPE_RLE_PSEUDOCOLOR) {
|
|
count = parse_rle_data_pseudocolor(ctx);
|
|
pbuf_count = count *ctx->pbuf->n_channels;
|
|
} else if (ctx->hdr->type == TGA_TYPE_RLE_TRUECOLOR) {
|
|
count = parse_rle_data_truecolor(ctx);
|
|
pbuf_count = count;
|
|
} else if (ctx->hdr->type == TGA_TYPE_RLE_GRAYSCALE) {
|
|
count = parse_rle_data_grayscale(ctx);
|
|
pbuf_count = count * 3;
|
|
}
|
|
ctx->in = io_buffer_free_segment(ctx->in, count, err);
|
|
if (!ctx->in)
|
|
return FALSE;
|
|
(*ctx->ufunc) (ctx->pbuf, 0, ctx->pbuf_bytes_done / ctx->pbuf->rowstride,
|
|
ctx->pbuf->width, pbuf_count / ctx->pbuf->rowstride,
|
|
ctx->udata);
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean try_colormap(TGAContext *ctx, GError **err)
|
|
{
|
|
static guchar *p;
|
|
static guint n;
|
|
|
|
g_return_val_if_fail(ctx != NULL, FALSE);
|
|
g_return_val_if_fail(ctx->cmap_size > 0, TRUE);
|
|
|
|
ctx->cmap = g_try_malloc(sizeof(TGAColormap));
|
|
if (!ctx->cmap) {
|
|
g_set_error(err, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
|
|
_("Can't allocate colormap structure"));
|
|
return FALSE;
|
|
}
|
|
ctx->cmap->size = LE16(ctx->hdr->cmap_n_colors);
|
|
ctx->cmap->cols = g_try_malloc(sizeof(TGAColor) * ctx->cmap->size);
|
|
if (!ctx->cmap->cols) {
|
|
g_set_error(err, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
|
|
_("Can't allocate colormap entries"));
|
|
g_free(ctx->cmap);
|
|
return FALSE;
|
|
}
|
|
|
|
p = ctx->in->data;
|
|
for (n = 0; n < ctx->cmap->size; n++) {
|
|
if ((ctx->hdr->cmap_bpp == 15) || (ctx->hdr->cmap_bpp == 16)) {
|
|
guint16 col = p[0] + (p[1] << 8);
|
|
ctx->cmap->cols[n].b = (col >> 7) & 0xf8;
|
|
ctx->cmap->cols[n].g = (col >> 2) & 0xf8;
|
|
ctx->cmap->cols[n].r = col << 3;
|
|
p += 2;
|
|
}
|
|
else if ((ctx->hdr->cmap_bpp == 24) || (ctx->hdr->cmap_bpp == 32)) {
|
|
ctx->cmap->cols[n].b = *p++;
|
|
ctx->cmap->cols[n].g = *p++;
|
|
ctx->cmap->cols[n].r = *p++;
|
|
if (ctx->hdr->cmap_bpp == 32)
|
|
ctx->cmap->cols[n].a = *p++;
|
|
} else {
|
|
g_set_error(err, GDK_PIXBUF_ERROR,
|
|
GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
|
|
_("Unexpected bitdepth for colormap entries"));
|
|
g_free(ctx->cmap->cols);
|
|
g_free(ctx->cmap);
|
|
return FALSE;
|
|
}
|
|
}
|
|
ctx->in = io_buffer_free_segment(ctx->in, ctx->cmap_size, err);
|
|
if (!ctx->in)
|
|
return FALSE;
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean try_preload(TGAContext *ctx, GError **err)
|
|
{
|
|
if (!ctx->hdr) {
|
|
if (ctx->in->size >= sizeof(TGAHeader)) {
|
|
ctx->hdr = g_try_malloc(sizeof(TGAHeader));
|
|
if (!ctx->hdr) {
|
|
g_set_error(err, GDK_PIXBUF_ERROR,
|
|
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
|
|
_("Can't allocate TGA header memory"));
|
|
return FALSE;
|
|
}
|
|
g_memmove(ctx->hdr, ctx->in->data, sizeof(TGAHeader));
|
|
ctx->in = io_buffer_free_segment(ctx->in, sizeof(TGAHeader), err);
|
|
if (!ctx->in)
|
|
return FALSE;
|
|
if (!fill_in_context(ctx, err))
|
|
return FALSE;
|
|
if (ctx->hdr->infolen > 255) {
|
|
g_set_error(err, GDK_PIXBUF_ERROR,
|
|
GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
|
|
_("TGA image comment length is too long"));
|
|
return FALSE;
|
|
}
|
|
if ((ctx->hdr->flags & TGA_INTERLEAVE_MASK) !=
|
|
TGA_INTERLEAVE_NONE ||
|
|
ctx->hdr->flags & TGA_ORIGIN_RIGHT ||
|
|
ctx->hdr->flags & TGA_ORIGIN_LOWER) {
|
|
g_set_error(err, GDK_PIXBUF_ERROR,
|
|
GDK_PIXBUF_ERROR_UNKNOWN_TYPE,
|
|
_("TGA image type not supported"));
|
|
return FALSE;
|
|
}
|
|
} else {
|
|
return TRUE;
|
|
}
|
|
}
|
|
if (!ctx->skipped_info) {
|
|
if (ctx->in->size >= ctx->hdr->infolen) {
|
|
ctx->in = io_buffer_free_segment(ctx->in, ctx->hdr->infolen, err);
|
|
if (!ctx->in)
|
|
return FALSE;
|
|
ctx->skipped_info = TRUE;
|
|
} else {
|
|
return TRUE;
|
|
}
|
|
}
|
|
if (ctx->hdr->has_cmap && !ctx->cmap) {
|
|
if (ctx->in->size >= ctx->cmap_size) {
|
|
if (!try_colormap(ctx, err))
|
|
return FALSE;
|
|
} else {
|
|
return TRUE;
|
|
}
|
|
}
|
|
if (!ctx->prepared) {
|
|
(*ctx->pfunc) (ctx->pbuf, NULL, ctx->udata);
|
|
ctx->prepared = TRUE;
|
|
}
|
|
/* We shouldn't get here anyway. */
|
|
return TRUE;
|
|
}
|
|
|
|
static gpointer gdk_pixbuf__tga_begin_load(ModulePreparedNotifyFunc f1,
|
|
ModuleUpdatedNotifyFunc f2,
|
|
gpointer udata, GError **err)
|
|
{
|
|
TGAContext *ctx;
|
|
|
|
ctx = g_try_malloc(sizeof(TGAContext));
|
|
if (!ctx) {
|
|
g_set_error(err, GDK_PIXBUF_ERROR,
|
|
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
|
|
_("Can't allocate memory for TGA context struct"));
|
|
return NULL;
|
|
}
|
|
|
|
ctx->hdr = NULL;
|
|
ctx->rowstride = 0;
|
|
ctx->run_length_encoded = FALSE;
|
|
|
|
ctx->cmap = NULL;
|
|
ctx->cmap_size = 0;
|
|
|
|
ctx->pbuf = NULL;
|
|
ctx->pbuf_bytes = 0;
|
|
ctx->pbuf_bytes_done = 0;
|
|
ctx->pptr = NULL;
|
|
|
|
ctx->in = io_buffer_new(err);
|
|
if (!ctx->in) {
|
|
g_free(ctx);
|
|
return NULL;
|
|
}
|
|
|
|
ctx->skipped_info = FALSE;
|
|
ctx->prepared = FALSE;
|
|
ctx->done = FALSE;
|
|
|
|
ctx->pfunc = f1;
|
|
ctx->ufunc = f2;
|
|
ctx->udata = udata;
|
|
|
|
return ctx;
|
|
}
|
|
|
|
static gboolean gdk_pixbuf__tga_load_increment(gpointer data,
|
|
const guchar *buffer,
|
|
guint size,
|
|
GError **err)
|
|
{
|
|
TGAContext *ctx = (TGAContext*) data;
|
|
g_return_val_if_fail(ctx != NULL, FALSE);
|
|
|
|
if (ctx->done)
|
|
return TRUE;
|
|
|
|
g_return_val_if_fail(buffer != NULL, TRUE);
|
|
ctx->in = io_buffer_append(ctx->in, buffer, size, err);
|
|
if (!ctx->in)
|
|
return FALSE;
|
|
if (!ctx->prepared) {
|
|
if (!try_preload(ctx, err))
|
|
return FALSE;
|
|
if (!ctx->prepared)
|
|
return TRUE;
|
|
if (ctx->in->size == 0)
|
|
return TRUE;
|
|
}
|
|
|
|
if (ctx->run_length_encoded) {
|
|
if (!parse_rle_data(ctx, err))
|
|
return FALSE;
|
|
} else {
|
|
while (ctx->in->size >= ctx->rowstride) {
|
|
if (ctx->completed_lines >= ctx->pbuf->height) {
|
|
g_set_error(err, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED,
|
|
_("Excess data in file"));
|
|
return FALSE;
|
|
}
|
|
if (!parse_data_for_row(ctx, err))
|
|
return FALSE;
|
|
ctx->completed_lines++;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean gdk_pixbuf__tga_stop_load(gpointer data, GError **err)
|
|
{
|
|
TGAContext *ctx = (TGAContext *) data;
|
|
g_return_val_if_fail(ctx != NULL, FALSE);
|
|
|
|
g_free(ctx->hdr);
|
|
if (ctx->cmap)
|
|
g_free(ctx->cmap);
|
|
g_object_unref(ctx->pbuf);
|
|
if (ctx->in->size)
|
|
ctx->in = io_buffer_free_segment(ctx->in, ctx->in->size, err);
|
|
if (!ctx->in) {
|
|
g_free(ctx);
|
|
return FALSE;
|
|
}
|
|
io_buffer_free(ctx->in);
|
|
g_free(ctx);
|
|
return TRUE;
|
|
}
|
|
|
|
static TGAHeader *get_header_from_file(FILE *f, GError **err)
|
|
{
|
|
TGAHeader *hdr;
|
|
|
|
if (!fseek_check(f, 0, SEEK_SET, err))
|
|
return NULL;
|
|
if (!(hdr = g_try_malloc(sizeof(TGAHeader)))) {
|
|
g_set_error(err, GDK_PIXBUF_ERROR,
|
|
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
|
|
_("Can't allocate memory for TGA header"));
|
|
return NULL;
|
|
}
|
|
if (!fread_check(hdr, sizeof(TGAHeader), 1, f, err)) {
|
|
g_free(hdr);
|
|
return NULL;
|
|
}
|
|
if (hdr->infolen > 255) {
|
|
g_set_error(err, GDK_PIXBUF_ERROR,
|
|
GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
|
|
_("Too big value in the infolen field of TGA header."));
|
|
g_free(hdr);
|
|
return NULL;
|
|
}
|
|
|
|
return hdr;
|
|
}
|
|
|
|
static TGAColormap *get_colormap_from_file(FILE *f,
|
|
TGAHeader *hdr,
|
|
GError **err)
|
|
{
|
|
TGAColormap *cmap;
|
|
guchar *pal_buf, *p;
|
|
guint n, pal_size;
|
|
|
|
if (!fseek_check(f, sizeof(TGAHeader) + hdr->infolen, SEEK_SET, err))
|
|
return NULL;
|
|
|
|
pal_size = LE16(hdr->cmap_n_colors) * ((hdr->cmap_bpp + 7) >> 3);
|
|
pal_buf = g_try_malloc(pal_size);
|
|
if (!pal_buf) {
|
|
g_set_error(err, GDK_PIXBUF_ERROR,
|
|
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
|
|
_("Can't allocate memory for TGA cmap temporary buffer"));
|
|
return NULL;
|
|
}
|
|
if (!fread_check(pal_buf, pal_size, 1, f, err)) {
|
|
g_free(pal_buf);
|
|
return NULL;
|
|
}
|
|
p = pal_buf;
|
|
|
|
if (!(cmap = g_try_malloc(sizeof(TGAColormap)))) {
|
|
g_set_error(err, GDK_PIXBUF_ERROR,
|
|
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
|
|
_("Can't allocate memory for TGA colormap struct"));
|
|
g_free(pal_buf);
|
|
return NULL;
|
|
}
|
|
cmap->size = LE16(hdr->cmap_n_colors);
|
|
cmap->cols = g_try_malloc(sizeof(TGAColor) * cmap->size);
|
|
if (!cmap->cols) {
|
|
g_set_error(err, GDK_PIXBUF_ERROR,
|
|
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
|
|
_("Can't allocate memory for TGA colormap entries"));
|
|
g_free(pal_buf);
|
|
g_free(cmap);
|
|
return NULL;
|
|
}
|
|
|
|
if (hdr->cmap_bpp != 15 && hdr->cmap_bpp != 16 &&
|
|
hdr->cmap_bpp != 24 && hdr->cmap_bpp != 32) {
|
|
g_set_error(err, GDK_PIXBUF_ERROR,
|
|
GDK_PIXBUF_ERROR_UNKNOWN_TYPE,
|
|
_("Unexpected bitdepth for TGA colormap"));
|
|
g_free(pal_buf);
|
|
g_free(cmap->cols);
|
|
g_free(cmap);
|
|
return NULL;
|
|
}
|
|
|
|
for (n = 0; n < cmap->size; n++) {
|
|
if ((hdr->cmap_bpp == 15) || (hdr->cmap_bpp == 16)) {
|
|
guint16 col = p[0] + (p[1] << 8);
|
|
p += 2;
|
|
cmap->cols[n].b = (col >> 7) & 0xf8;
|
|
cmap->cols[n].g = (col >> 2) & 0xf8;
|
|
cmap->cols[n].r = col << 3;
|
|
} else if ((hdr->cmap_bpp == 24) || (hdr->cmap_bpp == 32)) {
|
|
cmap->cols[n].b = *p++;
|
|
cmap->cols[n].g = *p++;
|
|
cmap->cols[n].r = *p++;
|
|
if (hdr->cmap_bpp == 32)
|
|
cmap->cols[n].a = *p++;
|
|
}
|
|
}
|
|
|
|
g_free(pal_buf);
|
|
return cmap;
|
|
}
|
|
|
|
static GdkPixbuf *get_image_pseudocolor(FILE *f, TGAHeader *hdr,
|
|
TGAColormap *cmap, gboolean rle,
|
|
GError **err)
|
|
{
|
|
GdkPixbuf *pbuf;
|
|
guchar *p, color, tag;
|
|
glong n, image_offset;
|
|
guint count;
|
|
|
|
image_offset = sizeof(TGAHeader) + hdr->infolen;
|
|
if (!hdr->has_cmap) {
|
|
g_set_error(err, GDK_PIXBUF_ERROR,
|
|
GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
|
|
_("Pseudo-Color image without colormap"));
|
|
return NULL;
|
|
} else {
|
|
image_offset += cmap->size * ((hdr->cmap_bpp + 7) >> 3);
|
|
}
|
|
if (!fseek_check(f, image_offset, SEEK_SET, err)) {
|
|
g_set_error(err, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED,
|
|
_("Can't seek to image offset -- end-of-file probably encountered"));
|
|
return NULL;
|
|
}
|
|
|
|
pbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, (hdr->cmap_bpp == 32), 8,
|
|
LE16(hdr->width), LE16(hdr->height));
|
|
if (!pbuf) {
|
|
g_set_error(err, GDK_PIXBUF_ERROR,
|
|
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
|
|
_("Can't allocate pixbuf"));
|
|
return NULL;
|
|
}
|
|
pbuf->destroy_fn = free_buffer;
|
|
pbuf->destroy_fn_data = NULL;
|
|
p = pbuf->pixels;
|
|
|
|
if (rle) {
|
|
n = count = 0;
|
|
for (; n < pbuf->width * pbuf->height;) {
|
|
if (!fread_check(&tag, 1, 1, f, err)) {
|
|
g_object_unref(pbuf);
|
|
return NULL;
|
|
}
|
|
if (tag & 0x80) {
|
|
count = (tag & 0x7f) + 1;
|
|
n += count;
|
|
if (!fread_check(&color, 1, 1, f, err)) {
|
|
g_object_unref(pbuf);
|
|
return NULL;
|
|
}
|
|
for (; count; count--) {
|
|
*p++ = cmap->cols[color].r;
|
|
*p++ = cmap->cols[color].g;
|
|
*p++ = cmap->cols[color].b;
|
|
if (hdr->cmap_bpp == 32)
|
|
*p++ = cmap->cols[color].a;
|
|
}
|
|
} else {
|
|
count = tag + 1;
|
|
n += count;
|
|
for (; count; count--) {
|
|
if (!fread_check(&color, 1, 1, f, err)) {
|
|
g_object_unref(pbuf);
|
|
return NULL;
|
|
}
|
|
*p++ = cmap->cols[color].r;
|
|
*p++ = cmap->cols[color].g;
|
|
*p++ = cmap->cols[color].b;
|
|
if (hdr->cmap_bpp == 32)
|
|
*p++ = cmap->cols[color].a;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
for (n = 0; n < pbuf->width * pbuf->height; n++) {
|
|
if (!fread_check(&color, 1, 1, f, err)) {
|
|
g_object_unref(pbuf);
|
|
return NULL;
|
|
}
|
|
*p++ = cmap->cols[color].r;
|
|
*p++ = cmap->cols[color].g;
|
|
*p++ = cmap->cols[color].b;
|
|
if (hdr->cmap_bpp == 32)
|
|
*p++ = cmap->cols[color].a;
|
|
}
|
|
}
|
|
|
|
return pbuf;
|
|
}
|
|
|
|
static void swap_channels_pixbuf(GdkPixbuf *pbuf)
|
|
{
|
|
guchar *p, swap;
|
|
glong n;
|
|
|
|
p = pbuf->pixels;
|
|
for (n = 0; n < pbuf->width * pbuf->height; n++) {
|
|
swap = p[0];
|
|
p[0] = p[2];
|
|
p[2] = swap;
|
|
p += pbuf->n_channels;
|
|
}
|
|
}
|
|
|
|
static GdkPixbuf *get_image_truecolor(FILE *f, TGAHeader *hdr,
|
|
gboolean rle, GError **err)
|
|
{
|
|
GdkPixbuf *pbuf;
|
|
guchar *p, tag;
|
|
glong n, image_offset;
|
|
guint32 pixel;
|
|
guint count;
|
|
|
|
image_offset = sizeof(TGAHeader) + hdr->infolen;
|
|
/* A truecolor image shouldn't actually have a colormap. */
|
|
if (hdr->has_cmap)
|
|
image_offset += LE16(hdr->cmap_n_colors) * ((hdr->cmap_bpp + 7) >> 3);
|
|
if (!fseek_check(f, image_offset, SEEK_SET, err))
|
|
return NULL;
|
|
|
|
pbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, (hdr->bpp == 32), 8,
|
|
LE16(hdr->width), LE16(hdr->height));
|
|
if (!pbuf) {
|
|
g_set_error(err, GDK_PIXBUF_ERROR,
|
|
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
|
|
_("Can't allocate pixbuf"));
|
|
return NULL;
|
|
}
|
|
pbuf->destroy_fn = free_buffer;
|
|
pbuf->destroy_fn_data = NULL;
|
|
p = pbuf->pixels;
|
|
|
|
if (rle) {
|
|
n = count = 0;
|
|
for (; n < pbuf->width * pbuf->height;) {
|
|
if (!fread_check(&tag, 1, 1, f, err)) {
|
|
g_object_unref(pbuf);
|
|
return NULL;
|
|
}
|
|
if (tag & 0x80) {
|
|
count = (tag & 0x7f) + 1;
|
|
n += count;
|
|
if (!fread_check(&pixel, pbuf->n_channels, 1, f, err)) {
|
|
g_object_unref(pbuf);
|
|
return NULL;
|
|
}
|
|
for (; count; count--) {
|
|
g_memmove(p, &pixel, pbuf->n_channels);
|
|
p += pbuf->n_channels;
|
|
}
|
|
} else {
|
|
count = tag + 1;
|
|
n += count;
|
|
if (!fread_check(p, pbuf->n_channels * count, 1, f, err)) {
|
|
g_object_unref(pbuf);
|
|
return NULL;
|
|
}
|
|
p += pbuf->n_channels * count;
|
|
}
|
|
}
|
|
} else {
|
|
if (!fread_check(p, pbuf->rowstride * pbuf->height, 1, f, err)) {
|
|
g_object_unref(pbuf);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
swap_channels_pixbuf(pbuf);
|
|
return pbuf;
|
|
}
|
|
|
|
static GdkPixbuf *get_image_grayscale(FILE *f, TGAHeader *hdr,
|
|
gboolean rle, GError **err)
|
|
{
|
|
GdkPixbuf *pbuf;
|
|
glong n, image_offset;
|
|
guchar *p, color, tag;
|
|
guint count;
|
|
|
|
image_offset = sizeof(TGAHeader) + hdr->infolen;
|
|
/* A grayscale image shouldn't actually have a colormap. */
|
|
if (hdr->has_cmap)
|
|
image_offset += LE16(hdr->cmap_n_colors) * ((hdr->cmap_bpp + 7) >> 3);
|
|
if (!fseek_check(f, image_offset, SEEK_SET, err))
|
|
return NULL;
|
|
|
|
pbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8,
|
|
LE16(hdr->width), LE16(hdr->height));
|
|
if (!pbuf) {
|
|
g_set_error(err, GDK_PIXBUF_ERROR,
|
|
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
|
|
_("Can't allocate pixbuf"));
|
|
return NULL;
|
|
}
|
|
pbuf->destroy_fn = free_buffer;
|
|
pbuf->destroy_fn_data = NULL;
|
|
p = pbuf->pixels;
|
|
|
|
if (rle) {
|
|
n = count = 0;
|
|
for (; n < pbuf->width * pbuf->height;) {
|
|
if (!fread_check(&tag, 1, 1, f, err)) {
|
|
g_object_unref(pbuf);
|
|
return NULL;
|
|
}
|
|
if (tag & 0x80) {
|
|
count = (tag & 0x7f) + 1;
|
|
n += count;
|
|
if (!fread_check(&color, 1, 1, f, err)) {
|
|
g_object_unref(pbuf);
|
|
return NULL;
|
|
}
|
|
for (; count; count--) {
|
|
p[0] = p[1] = p[2] = color;
|
|
p += 3;
|
|
}
|
|
} else {
|
|
count = tag + 1;
|
|
n += count;
|
|
for (; count; count--) {
|
|
if (!fread_check(&color, 1, 1, f, err)) {
|
|
g_object_unref(pbuf);
|
|
return NULL;
|
|
}
|
|
p[0] = p[1] = p[2] = color;
|
|
p += 3;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
for (n = 0; n < pbuf->width * pbuf->height; n++) {
|
|
if (!fread_check(&color, 1, 1, f, err)) {
|
|
g_object_unref(pbuf);
|
|
return NULL;
|
|
}
|
|
p[0] = p[1] = p[2] = color;
|
|
p += 3;
|
|
}
|
|
}
|
|
|
|
return pbuf;
|
|
}
|
|
|
|
static GdkPixbuf *gdk_pixbuf__tga_load(FILE *f, GError **err)
|
|
{
|
|
TGAHeader *hdr;
|
|
TGAColormap *cmap;
|
|
GdkPixbuf *pbuf;
|
|
|
|
cmap = NULL;
|
|
hdr = get_header_from_file(f, err);
|
|
if (!hdr)
|
|
return NULL;
|
|
if ((hdr->flags & TGA_INTERLEAVE_MASK) != TGA_INTERLEAVE_NONE ||
|
|
hdr->flags & TGA_ORIGIN_RIGHT || hdr->flags & TGA_ORIGIN_LOWER) {
|
|
g_set_error(err, GDK_PIXBUF_ERROR,
|
|
GDK_PIXBUF_ERROR_UNKNOWN_TYPE,
|
|
_("Unsupported TGA image type"));
|
|
g_free(hdr);
|
|
return NULL;
|
|
}
|
|
|
|
if (hdr->has_cmap && ((hdr->type == TGA_TYPE_PSEUDOCOLOR) ||
|
|
(hdr->type == TGA_TYPE_RLE_PSEUDOCOLOR))) {
|
|
cmap = get_colormap_from_file(f, hdr, err);
|
|
if (!cmap) {
|
|
g_free(hdr);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (hdr->type == TGA_TYPE_PSEUDOCOLOR)
|
|
pbuf = get_image_pseudocolor(f, hdr, cmap, FALSE, err);
|
|
else if (hdr->type == TGA_TYPE_RLE_PSEUDOCOLOR)
|
|
pbuf = get_image_pseudocolor(f, hdr, cmap, TRUE, err);
|
|
else if (hdr->type == TGA_TYPE_TRUECOLOR)
|
|
pbuf = get_image_truecolor(f, hdr, FALSE, err);
|
|
else if (hdr->type == TGA_TYPE_RLE_TRUECOLOR)
|
|
pbuf = get_image_truecolor(f, hdr, TRUE, err);
|
|
else if (hdr->type == TGA_TYPE_GRAYSCALE)
|
|
pbuf = get_image_grayscale(f, hdr, FALSE, err);
|
|
else if (hdr->type == TGA_TYPE_RLE_GRAYSCALE)
|
|
pbuf = get_image_grayscale(f, hdr, TRUE, err);
|
|
else {
|
|
g_set_error(err, GDK_PIXBUF_ERROR,
|
|
GDK_PIXBUF_ERROR_UNKNOWN_TYPE,
|
|
_("Unsupported TGA image type"));
|
|
pbuf = NULL;
|
|
}
|
|
|
|
if (cmap) {
|
|
g_free(cmap->cols);
|
|
g_free(cmap);
|
|
}
|
|
g_free(hdr);
|
|
|
|
return pbuf;
|
|
}
|
|
|
|
void
|
|
gdk_pixbuf__tga_fill_vtable (GdkPixbufModule *module)
|
|
{
|
|
module->load = gdk_pixbuf__tga_load;
|
|
module->begin_load = gdk_pixbuf__tga_begin_load;
|
|
module->stop_load = gdk_pixbuf__tga_stop_load;
|
|
module->load_increment = gdk_pixbuf__tga_load_increment;
|
|
}
|