1 /* GdkPixbuf library - GdkPixdata - functions for inlined pixbuf handling
2 * Copyright (C) 1999, 2001 Tim Janik
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
20 #include "gdk-pixdata.h"
22 #include "gdk-pixbuf-private.h"
25 #define APPEND g_string_append_printf
27 /* --- functions --- */
29 pixdata_get_length (const GdkPixdata *pixdata)
33 if ((pixdata->pixdata_type & GDK_PIXDATA_COLOR_TYPE_MASK) == GDK_PIXDATA_COLOR_TYPE_RGB)
35 else if ((pixdata->pixdata_type & GDK_PIXDATA_COLOR_TYPE_MASK) == GDK_PIXDATA_COLOR_TYPE_RGBA)
38 return 0; /* invalid format */
39 switch (pixdata->pixdata_type & GDK_PIXDATA_ENCODING_MASK)
43 case GDK_PIXDATA_ENCODING_RAW:
44 length = pixdata->rowstride * pixdata->height;
46 case GDK_PIXDATA_ENCODING_RLE:
47 /* need an RLE walk to determine size */
48 max_length = pixdata->rowstride * pixdata->height;
49 rle_buffer = pixdata->pixel_data;
51 while (length < max_length)
53 guint chunk_length = *(rle_buffer++);
55 if (chunk_length & 128)
57 chunk_length = chunk_length - 128;
58 if (!chunk_length) /* RLE data corrupted */
60 length += chunk_length * bpp;
65 if (!chunk_length) /* RLE data corrupted */
68 length += chunk_length;
69 rle_buffer += chunk_length;
72 length = rle_buffer - pixdata->pixel_data;
82 * gdk_pixdata_serialize:
83 * @pixdata: a valid #GdkPixdata structure to serialize.
84 * @stream_length_p: location to store the resulting stream length in.
86 * Serializes a #GdkPixdata structure into a byte stream.
87 * The byte stream consists of a straightforward writeout of the
88 * #GdkPixdata fields in network byte order, plus the @pixel_data
89 * bytes the structure points to.
91 * Return value: A newly-allocated string containing the serialized
92 * #GdkPixdata structure.
94 guint8* /* free result */
95 gdk_pixdata_serialize (const GdkPixdata *pixdata,
96 guint *stream_length_p)
102 /* check args passing */
103 g_return_val_if_fail (pixdata != NULL, NULL);
104 g_return_val_if_fail (stream_length_p != NULL, NULL);
105 /* check pixdata contents */
106 g_return_val_if_fail (pixdata->magic == GDK_PIXBUF_MAGIC_NUMBER, NULL);
107 g_return_val_if_fail (pixdata->width > 0, NULL);
108 g_return_val_if_fail (pixdata->height > 0, NULL);
109 g_return_val_if_fail (pixdata->rowstride >= pixdata->width, NULL);
110 g_return_val_if_fail ((pixdata->pixdata_type & GDK_PIXDATA_COLOR_TYPE_MASK) == GDK_PIXDATA_COLOR_TYPE_RGB ||
111 (pixdata->pixdata_type & GDK_PIXDATA_COLOR_TYPE_MASK) == GDK_PIXDATA_COLOR_TYPE_RGBA, NULL);
112 g_return_val_if_fail ((pixdata->pixdata_type & GDK_PIXDATA_SAMPLE_WIDTH_MASK) == GDK_PIXDATA_SAMPLE_WIDTH_8, NULL);
113 g_return_val_if_fail ((pixdata->pixdata_type & GDK_PIXDATA_ENCODING_MASK) == GDK_PIXDATA_ENCODING_RAW ||
114 (pixdata->pixdata_type & GDK_PIXDATA_ENCODING_MASK) == GDK_PIXDATA_ENCODING_RLE, NULL);
115 g_return_val_if_fail (pixdata->pixel_data != NULL, NULL);
117 length = pixdata_get_length (pixdata);
119 /* check length field */
120 g_return_val_if_fail (length != 0, NULL);
122 stream = g_malloc (GDK_PIXDATA_HEADER_LENGTH + length);
123 istream = (guint32*) stream;
126 *istream++ = g_htonl (GDK_PIXBUF_MAGIC_NUMBER);
127 *istream++ = g_htonl (GDK_PIXDATA_HEADER_LENGTH + length);
128 *istream++ = g_htonl (pixdata->pixdata_type);
129 *istream++ = g_htonl (pixdata->rowstride);
130 *istream++ = g_htonl (pixdata->width);
131 *istream++ = g_htonl (pixdata->height);
133 /* copy pixel data */
134 s = (guint8*) istream;
135 memcpy (s, pixdata->pixel_data, length);
138 *stream_length_p = GDK_PIXDATA_HEADER_LENGTH + length;
139 g_assert (s - stream == *stream_length_p); /* paranoid */
144 #define return_header_corrupt(error) { \
145 g_set_error (error, GDK_PIXBUF_ERROR, \
146 GDK_PIXBUF_ERROR_CORRUPT_IMAGE, _("Image header corrupt")); \
149 #define return_invalid_format(error) { \
150 g_set_error (error, GDK_PIXBUF_ERROR, \
151 GDK_PIXBUF_ERROR_UNKNOWN_TYPE, _("Image format unknown")); \
154 #define return_pixel_corrupt(error) { \
155 g_set_error (error, GDK_PIXBUF_ERROR, \
156 GDK_PIXBUF_ERROR_CORRUPT_IMAGE, _("Image pixel data corrupt")); \
160 static inline const guint8 *
161 get_uint32 (const guint8 *stream, guint *result)
163 *result = (stream[0] << 24) + (stream[1] << 16) + (stream[2] << 8) + stream[3];
168 * gdk_pixdata_deserialize:
169 * @pixdata: a #GdkPixdata structure to be filled in.
170 * @stream_length: length of the stream used for deserialization.
171 * @stream: stream of bytes containing a serialized #GdkPixdata structure.
172 * @error: #GError location to indicate failures (maybe %NULL to ignore errors).
174 * Deserializes (reconstruct) a #GdkPixdata structure from a byte stream.
175 * The byte stream consists of a straightforward writeout of the
176 * #GdkPixdata fields in network byte order, plus the @pixel_data
177 * bytes the structure points to.
178 * The @pixdata contents are reconstructed byte by byte and are checked
179 * for validity. This function may fail with %GDK_PIXBUF_CORRUPT_IMAGE
180 * or %GDK_PIXBUF_ERROR_UNKNOWN_TYPE.
182 * Return value: Upon successful deserialization %TRUE is returned,
186 gdk_pixdata_deserialize (GdkPixdata *pixdata,
188 const guint8 *stream,
191 guint color_type, sample_width, encoding;
193 g_return_val_if_fail (pixdata != NULL, FALSE);
194 if (stream_length < GDK_PIXDATA_HEADER_LENGTH)
195 return_header_corrupt (error);
196 g_return_val_if_fail (stream != NULL, FALSE);
199 /* deserialize header */
200 stream = get_uint32 (stream, &pixdata->magic);
201 stream = get_uint32 (stream, (guint32 *)&pixdata->length);
202 if (pixdata->magic != GDK_PIXBUF_MAGIC_NUMBER || pixdata->length < GDK_PIXDATA_HEADER_LENGTH)
203 return_header_corrupt (error);
204 stream = get_uint32 (stream, &pixdata->pixdata_type);
205 stream = get_uint32 (stream, &pixdata->rowstride);
206 stream = get_uint32 (stream, &pixdata->width);
207 stream = get_uint32 (stream, &pixdata->height);
208 if (pixdata->width < 1 || pixdata->height < 1 ||
209 pixdata->rowstride < pixdata->width)
210 return_header_corrupt (error);
211 color_type = pixdata->pixdata_type & GDK_PIXDATA_COLOR_TYPE_MASK;
212 sample_width = pixdata->pixdata_type & GDK_PIXDATA_SAMPLE_WIDTH_MASK;
213 encoding = pixdata->pixdata_type & GDK_PIXDATA_ENCODING_MASK;
214 if ((color_type != GDK_PIXDATA_COLOR_TYPE_RGB &&
215 color_type != GDK_PIXDATA_COLOR_TYPE_RGBA) ||
216 sample_width != GDK_PIXDATA_SAMPLE_WIDTH_8 ||
217 (encoding != GDK_PIXDATA_ENCODING_RAW &&
218 encoding != GDK_PIXDATA_ENCODING_RLE))
219 return_invalid_format (error);
221 /* deserialize pixel data */
222 if (stream_length < pixdata->length - GDK_PIXDATA_HEADER_LENGTH)
223 return_pixel_corrupt (error);
224 pixdata->pixel_data = (guint8 *)stream;
230 diff2_rgb (guint8 *ip)
232 return ip[0] != ip[3] || ip[1] != ip[4] || ip[2] != ip[5];
236 diff2_rgba (guint8 *ip)
238 return ip[0] != ip[4] || ip[1] != ip[5] || ip[2] != ip[6] || ip[3] != ip[7];
241 static guint8* /* dest buffer bound */
242 rl_encode_rgbx (guint8 *bp, /* dest buffer */
243 guint8 *ip, /* image pointer */
244 guint8 *limit, /* image upper bound */
247 gboolean (*diff2_pix) (guint8 *) = n_ch > 3 ? diff2_rgba : diff2_rgb;
248 guint8 *ilimit = limit - n_ch;
252 g_assert (ip < ilimit); /* paranoid */
260 while (l < 127 && ip < ilimit && diff2_pix (ip))
261 { ip += n_ch; l += 1; }
262 if (ip == ilimit && l < 127)
263 { ip += n_ch; l += 1; }
265 memcpy (bp, s_ip, l * n_ch);
273 while (l < 127 && ip < ilimit && !diff2_pix (ip))
274 { ip += n_ch; l += 1; }
276 memcpy (bp, ip, n_ch);
283 memcpy (bp, ip, n_ch);
293 * gdk_pixdata_from_pixbuf:
294 * @pixdata: a #GdkPixdata to fill.
295 * @pixbuf: the data to fill @pixdata with.
296 * @use_rle: whether to use run-length encoding for the pixel data.
298 * Converts a #GdkPixbuf to a #GdkPixdata. If @use_rle is %TRUE, the
299 * pixel data is run-length encoded into newly-allocated memory and a
300 * pointer to that memory is returned.
302 * Returns: If @ure_rle is %TRUE, a pointer to the newly-allocated memory
303 * for the run-length encoded pixel data, otherwise %NULL.
306 gdk_pixdata_from_pixbuf (GdkPixdata *pixdata,
307 const GdkPixbuf *pixbuf,
310 gpointer free_me = NULL;
311 guint height, rowstride, encoding, bpp, length;
314 g_return_val_if_fail (pixdata != NULL, NULL);
315 g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
316 g_return_val_if_fail (pixbuf->bits_per_sample == 8, NULL);
317 g_return_val_if_fail ((pixbuf->n_channels == 3 && !pixbuf->has_alpha) ||
318 (pixbuf->n_channels == 4 && pixbuf->has_alpha), NULL);
319 g_return_val_if_fail (pixbuf->rowstride >= pixbuf->width, NULL);
321 height = pixbuf->height;
322 rowstride = pixbuf->rowstride;
323 encoding = use_rle ? GDK_PIXDATA_ENCODING_RLE : GDK_PIXDATA_ENCODING_RAW;
324 bpp = pixbuf->has_alpha ? 4 : 3;
326 if (encoding == GDK_PIXDATA_ENCODING_RLE)
328 guint pad, n_bytes = rowstride * height;
329 guint8 *img_buffer_end, *data;
332 pad = MAX (pad, 130 + n_bytes / 127);
333 data = g_new (guint8, pad + n_bytes);
336 img_buffer_end = rl_encode_rgbx (img_buffer,
337 pixbuf->pixels, pixbuf->pixels + n_bytes,
339 length = img_buffer_end - img_buffer;
343 img_buffer = pixbuf->pixels;
344 length = rowstride * height;
347 pixdata->magic = GDK_PIXBUF_MAGIC_NUMBER;
348 pixdata->length = GDK_PIXDATA_HEADER_LENGTH + length;
349 pixdata->pixdata_type = pixbuf->has_alpha ? GDK_PIXDATA_COLOR_TYPE_RGBA : GDK_PIXDATA_COLOR_TYPE_RGB;
350 pixdata->pixdata_type |= GDK_PIXDATA_SAMPLE_WIDTH_8;
351 pixdata->pixdata_type |= encoding;
352 pixdata->rowstride = rowstride;
353 pixdata->width = pixbuf->width;
354 pixdata->height = height;
355 pixdata->pixel_data = img_buffer;
361 * gdk_pixbuf_from_pixdata:
362 * @pixdata: a #GdkPixdata to convert into a #GdkPixbuf.
363 * @copy_pixels: whether to copy raw pixel data; run-length encoded
364 * pixel data is always copied.
365 * @error: location to store possible errors.
367 * Converts a #GdkPixdata to a #GdkPixbuf. If @copy_pixels is %TRUE or
368 * if the pixel data is run-length-encoded, the pixel data is copied into
369 * newly-allocated memory; otherwise it is reused.
371 * Returns: a new #GdkPixbuf.
374 gdk_pixbuf_from_pixdata (const GdkPixdata *pixdata,
375 gboolean copy_pixels,
381 g_return_val_if_fail (pixdata != NULL, NULL);
382 g_return_val_if_fail (pixdata->width > 0, NULL);
383 g_return_val_if_fail (pixdata->height > 0, NULL);
384 g_return_val_if_fail (pixdata->rowstride >= pixdata->width, NULL);
385 g_return_val_if_fail ((pixdata->pixdata_type & GDK_PIXDATA_COLOR_TYPE_MASK) == GDK_PIXDATA_COLOR_TYPE_RGB ||
386 (pixdata->pixdata_type & GDK_PIXDATA_COLOR_TYPE_MASK) == GDK_PIXDATA_COLOR_TYPE_RGBA, NULL);
387 g_return_val_if_fail ((pixdata->pixdata_type & GDK_PIXDATA_SAMPLE_WIDTH_MASK) == GDK_PIXDATA_SAMPLE_WIDTH_8, NULL);
388 g_return_val_if_fail ((pixdata->pixdata_type & GDK_PIXDATA_ENCODING_MASK) == GDK_PIXDATA_ENCODING_RAW ||
389 (pixdata->pixdata_type & GDK_PIXDATA_ENCODING_MASK) == GDK_PIXDATA_ENCODING_RLE, NULL);
390 g_return_val_if_fail (pixdata->pixel_data != NULL, NULL);
392 bpp = (pixdata->pixdata_type & GDK_PIXDATA_COLOR_TYPE_MASK) == GDK_PIXDATA_COLOR_TYPE_RGB ? 3 : 4;
393 encoding = pixdata->pixdata_type & GDK_PIXDATA_ENCODING_MASK;
394 if (encoding == GDK_PIXDATA_ENCODING_RLE)
398 data = g_try_malloc (pixdata->rowstride * pixdata->height);
401 g_set_error (error, GDK_PIXBUF_ERROR,
402 GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
403 ngettext("failed to allocate image buffer of %u byte",
404 "failed to allocate image buffer of %u bytes",
405 pixdata->rowstride * pixdata->height),
406 pixdata->rowstride * pixdata->height);
410 if (encoding == GDK_PIXDATA_ENCODING_RLE)
412 const guint8 *rle_buffer = pixdata->pixel_data;
413 guint8 *image_buffer = data;
414 guint8 *image_limit = data + pixdata->rowstride * pixdata->height;
415 gboolean check_overrun = FALSE;
417 while (image_buffer < image_limit)
419 guint length = *(rle_buffer++);
423 length = length - 128;
424 check_overrun = image_buffer + length * bpp > image_limit;
426 length = (image_limit - image_buffer) / bpp;
427 if (bpp < 4) /* RGB */
430 memcpy (image_buffer, rle_buffer, 3);
437 memcpy (image_buffer, rle_buffer, 4);
446 check_overrun = image_buffer + length > image_limit;
448 length = image_limit - image_buffer;
449 memcpy (image_buffer, rle_buffer, length);
450 image_buffer += length;
451 rle_buffer += length;
457 g_set_error (error, GDK_PIXBUF_ERROR,
458 GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
459 _("Image pixel data corrupt"));
463 else if (copy_pixels)
464 memcpy (data, pixdata->pixel_data, pixdata->rowstride * pixdata->height);
466 data = pixdata->pixel_data;
468 return gdk_pixbuf_new_from_data (data, GDK_COLORSPACE_RGB,
469 (pixdata->pixdata_type & GDK_PIXDATA_COLOR_TYPE_MASK) == GDK_PIXDATA_COLOR_TYPE_RGBA,
470 8, pixdata->width, pixdata->height, pixdata->rowstride,
471 copy_pixels ? (GdkPixbufDestroyNotify) g_free : NULL, data);
476 gboolean dump_stream;
477 gboolean dump_struct;
478 gboolean dump_macros;
479 gboolean dump_gtypes;
480 gboolean dump_rle_decoder;
481 const gchar *static_prefix;
482 const gchar *const_prefix;
490 save_uchar (CSourceData *cdata,
493 GString *gstring = cdata->gstring;
497 if (cdata->dump_struct || cdata->dump_stream)
499 g_string_append (gstring, "\"\n \"");
503 if (cdata->dump_macros)
505 g_string_append (gstring, "\" \\\n \"");
510 if (d < 33 || d > 126 || d == '?')
512 APPEND (gstring, "\\%o", d);
513 cdata->pos += 1 + 1 + (d > 7) + (d > 63);
519 g_string_append (gstring, "\\\\");
524 g_string_append (gstring, "\\\"");
527 else if (cdata->pad && d >= '0' && d <= '9')
529 g_string_append (gstring, "\"\"");
530 g_string_append_c (gstring, d);
535 g_string_append_c (gstring, d);
543 save_rle_decoder (GString *gstring,
544 const gchar *macro_name,
546 const gchar *s_uint_8,
549 APPEND (gstring, "#define %s_RUN_LENGTH_DECODE(image_buf, rle_data, size, bpp) do \\\n",
551 APPEND (gstring, "{ %s __bpp; %s *__ip; const %s *__il, *__rd; \\\n", s_uint, s_uint_8, s_uint_8);
552 APPEND (gstring, " __bpp = (bpp); __ip = (image_buf); __il = __ip + (size) * __bpp; \\\n");
554 APPEND (gstring, " __rd = (rle_data); if (__bpp > 3) { /* RGBA */ \\\n");
556 APPEND (gstring, " while (__ip < __il) { %s __l = *(__rd++); \\\n", s_uint);
557 APPEND (gstring, " if (__l & 128) { __l = __l - 128; \\\n");
558 APPEND (gstring, " do { memcpy (__ip, __rd, 4); __ip += 4; } while (--__l); __rd += 4; \\\n");
559 APPEND (gstring, " } else { __l *= 4; memcpy (__ip, __rd, __l); \\\n");
560 APPEND (gstring, " __ip += __l; __rd += __l; } } \\\n");
562 APPEND (gstring, " } else { /* RGB */ \\\n");
564 APPEND (gstring, " while (__ip < __il) { %s __l = *(__rd++); \\\n", s_uint);
565 APPEND (gstring, " if (__l & 128) { __l = __l - 128; \\\n");
566 APPEND (gstring, " do { memcpy (__ip, __rd, 3); __ip += 3; } while (--__l); __rd += 3; \\\n");
567 APPEND (gstring, " } else { __l *= 3; memcpy (__ip, __rd, __l); \\\n");
568 APPEND (gstring, " __ip += __l; __rd += __l; } } \\\n");
570 APPEND (gstring, " } } while (0)\n");
574 * gdk_pixdata_to_csource:
575 * @pixdata: a #GdkPixdata to convert to C source.
576 * @name: used for naming generated data structures or macros.
577 * @dump_type: a #GdkPixdataDumpType determining the kind of C
578 * source to be generated.
580 * Generates C source code suitable for compiling images directly
583 * GTK+ ships with a program called <command>gdk-pixbuf-csource</command>
584 * which offers a command line interface to this function.
586 * Returns: a newly-allocated string containing the C source form
590 gdk_pixdata_to_csource (GdkPixdata *pixdata,
592 GdkPixdataDumpType dump_type)
594 CSourceData cdata = { 0, };
595 gchar *s_uint_8, *s_uint_32, *s_uint, *s_char, *s_null;
596 guint bpp, width, height, rowstride;
597 gboolean rle_encoded;
599 guint8 *img_buffer, *img_buffer_end, *stream = NULL;
603 /* check args passing */
604 g_return_val_if_fail (pixdata != NULL, NULL);
605 g_return_val_if_fail (name != NULL, NULL);
606 /* check pixdata contents */
607 g_return_val_if_fail (pixdata->magic == GDK_PIXBUF_MAGIC_NUMBER, NULL);
608 g_return_val_if_fail (pixdata->width > 0, NULL);
609 g_return_val_if_fail (pixdata->height > 0, NULL);
610 g_return_val_if_fail (pixdata->rowstride >= pixdata->width, NULL);
611 g_return_val_if_fail ((pixdata->pixdata_type & GDK_PIXDATA_COLOR_TYPE_MASK) == GDK_PIXDATA_COLOR_TYPE_RGB ||
612 (pixdata->pixdata_type & GDK_PIXDATA_COLOR_TYPE_MASK) == GDK_PIXDATA_COLOR_TYPE_RGBA, NULL);
613 g_return_val_if_fail ((pixdata->pixdata_type & GDK_PIXDATA_SAMPLE_WIDTH_MASK) == GDK_PIXDATA_SAMPLE_WIDTH_8, NULL);
614 g_return_val_if_fail ((pixdata->pixdata_type & GDK_PIXDATA_ENCODING_MASK) == GDK_PIXDATA_ENCODING_RAW ||
615 (pixdata->pixdata_type & GDK_PIXDATA_ENCODING_MASK) == GDK_PIXDATA_ENCODING_RLE, NULL);
616 g_return_val_if_fail (pixdata->pixel_data != NULL, NULL);
618 img_buffer = pixdata->pixel_data;
619 if (pixdata->length < 1)
620 img_buffer_end = img_buffer + pixdata_get_length (pixdata);
622 img_buffer_end = img_buffer + pixdata->length - GDK_PIXDATA_HEADER_LENGTH;
623 g_return_val_if_fail (img_buffer < img_buffer_end, NULL);
625 bpp = (pixdata->pixdata_type & GDK_PIXDATA_COLOR_TYPE_MASK) == GDK_PIXDATA_COLOR_TYPE_RGB ? 3 : 4;
626 width = pixdata->width;
627 height = pixdata->height;
628 rowstride = pixdata->rowstride;
629 rle_encoded = (pixdata->pixdata_type & GDK_PIXDATA_ENCODING_RLE) > 0;
630 macro_name = g_ascii_strup (name, -1);
632 cdata.dump_macros = (dump_type & GDK_PIXDATA_DUMP_MACROS) > 0;
633 cdata.dump_struct = (dump_type & GDK_PIXDATA_DUMP_PIXDATA_STRUCT) > 0;
634 cdata.dump_stream = !cdata.dump_macros && !cdata.dump_struct;
635 g_return_val_if_fail (cdata.dump_macros + cdata.dump_struct + cdata.dump_stream == 1, NULL);
637 cdata.dump_gtypes = (dump_type & GDK_PIXDATA_DUMP_CTYPES) == 0;
638 cdata.dump_rle_decoder = (dump_type & GDK_PIXDATA_DUMP_RLE_DECODER) > 0;
639 cdata.static_prefix = (dump_type & GDK_PIXDATA_DUMP_STATIC) ? "static " : "";
640 cdata.const_prefix = (dump_type & GDK_PIXDATA_DUMP_CONST) ? "const " : "";
641 gstring = g_string_new (NULL);
642 cdata.gstring = gstring;
644 if (!cdata.dump_macros && cdata.dump_gtypes)
646 s_uint_8 = "guint8 ";
647 s_uint_32 = "guint32";
652 else if (!cdata.dump_macros)
654 s_uint_8 = "unsigned char";
655 s_uint_32 = "unsigned int ";
656 s_uint = "unsigned int ";
658 s_null = "(char*) 0";
660 else if (cdata.dump_macros && cdata.dump_gtypes)
663 s_uint_32 = "guint32";
668 else /* cdata.dump_macros && !cdata.dump_gtypes */
670 s_uint_8 = "unsigned char";
671 s_uint_32 = "unsigned int";
672 s_uint = "unsigned int";
674 s_null = "(char*) 0";
680 "/* GdkPixbuf %s C-Source image dump %s*/\n\n",
681 bpp > 3 ? "RGBA" : "RGB",
682 rle_encoded ? "1-byte-run-length-encoded " : "");
684 /* dump RLE decoder for structures
686 if (cdata.dump_rle_decoder && cdata.dump_struct)
687 save_rle_decoder (gstring,
689 cdata.dump_gtypes ? "guint" : "unsigned int",
690 cdata.dump_gtypes ? "guint8" : "unsigned char",
693 /* format & size blurbs
695 if (cdata.dump_macros)
697 APPEND (gstring, "#define %s_ROWSTRIDE (%u)\n",
698 macro_name, rowstride);
699 APPEND (gstring, "#define %s_WIDTH (%u)\n",
701 APPEND (gstring, "#define %s_HEIGHT (%u)\n",
703 APPEND (gstring, "#define %s_BYTES_PER_PIXEL (%u) /* 3:RGB, 4:RGBA */\n",
706 if (cdata.dump_struct)
708 APPEND (gstring, "%s%sGdkPixdata %s = {\n",
709 cdata.static_prefix, cdata.const_prefix, name);
710 APPEND (gstring, " 0x%x, /* Pixbuf magic: 'GdkP' */\n",
711 GDK_PIXBUF_MAGIC_NUMBER);
712 APPEND (gstring, " %u + %lu, /* header length + pixel_data length */\n",
713 GDK_PIXDATA_HEADER_LENGTH,
714 rle_encoded ? (glong)(img_buffer_end - img_buffer) : (glong)rowstride * height);
715 APPEND (gstring, " 0x%x, /* pixdata_type */\n",
716 pixdata->pixdata_type);
717 APPEND (gstring, " %u, /* rowstride */\n",
719 APPEND (gstring, " %u, /* width */\n",
721 APPEND (gstring, " %u, /* height */\n",
723 APPEND (gstring, " /* pixel_data: */\n");
725 if (cdata.dump_stream)
727 guint pix_length = img_buffer_end - img_buffer;
729 stream = gdk_pixdata_serialize (pixdata, &stream_length);
731 img_buffer_end = stream + stream_length;
733 APPEND (gstring, "#ifdef __SUNPRO_C\n");
734 APPEND (gstring, "#pragma align 4 (%s)\n", name);
735 APPEND (gstring, "#endif\n");
737 APPEND (gstring, "#ifdef __GNUC__\n");
738 APPEND (gstring, "%s%s%s %s[] __attribute__ ((__aligned__ (4))) = \n",
739 cdata.static_prefix, cdata.const_prefix,
740 cdata.dump_gtypes ? "guint8" : "unsigned char",
742 APPEND (gstring, "#else\n");
743 APPEND (gstring, "%s%s%s %s[] = \n",
744 cdata.static_prefix, cdata.const_prefix,
745 cdata.dump_gtypes ? "guint8" : "unsigned char",
747 APPEND (gstring, "#endif\n");
749 APPEND (gstring, "{ \"\"\n /* Pixbuf magic (0x%x) */\n \"",
750 GDK_PIXBUF_MAGIC_NUMBER);
752 save_uchar (&cdata, *img_buffer++); save_uchar (&cdata, *img_buffer++);
753 save_uchar (&cdata, *img_buffer++); save_uchar (&cdata, *img_buffer++);
754 APPEND (gstring, "\"\n /* length: header (%u) + pixel_data (%u) */\n \"",
755 GDK_PIXDATA_HEADER_LENGTH,
756 rle_encoded ? pix_length : rowstride * height);
758 save_uchar (&cdata, *img_buffer++); save_uchar (&cdata, *img_buffer++);
759 save_uchar (&cdata, *img_buffer++); save_uchar (&cdata, *img_buffer++);
760 APPEND (gstring, "\"\n /* pixdata_type (0x%x) */\n \"",
761 pixdata->pixdata_type);
763 save_uchar (&cdata, *img_buffer++); save_uchar (&cdata, *img_buffer++);
764 save_uchar (&cdata, *img_buffer++); save_uchar (&cdata, *img_buffer++);
765 APPEND (gstring, "\"\n /* rowstride (%u) */\n \"",
768 save_uchar (&cdata, *img_buffer++); save_uchar (&cdata, *img_buffer++);
769 save_uchar (&cdata, *img_buffer++); save_uchar (&cdata, *img_buffer++);
770 APPEND (gstring, "\"\n /* width (%u) */\n \"", width);
772 save_uchar (&cdata, *img_buffer++); save_uchar (&cdata, *img_buffer++);
773 save_uchar (&cdata, *img_buffer++); save_uchar (&cdata, *img_buffer++);
774 APPEND (gstring, "\"\n /* height (%u) */\n \"", height);
776 save_uchar (&cdata, *img_buffer++); save_uchar (&cdata, *img_buffer++);
777 save_uchar (&cdata, *img_buffer++); save_uchar (&cdata, *img_buffer++);
778 APPEND (gstring, "\"\n /* pixel_data: */\n");
783 if (cdata.dump_macros)
785 APPEND (gstring, "#define %s_%sPIXEL_DATA ((%s*) \\\n",
787 rle_encoded ? "RLE_" : "",
789 APPEND (gstring, " \"");
792 if (cdata.dump_struct)
794 APPEND (gstring, " \"");
797 if (cdata.dump_stream)
799 APPEND (gstring, " \"");
806 save_uchar (&cdata, *img_buffer++);
807 while (img_buffer < img_buffer_end);
809 /* pixel_data trailer
811 if (cdata.dump_macros)
812 APPEND (gstring, "\")\n\n");
813 if (cdata.dump_struct)
814 APPEND (gstring, "\",\n};\n\n");
815 if (cdata.dump_stream)
816 APPEND (gstring, "\"};\n\n");
818 /* dump RLE decoder for macros
820 if (cdata.dump_rle_decoder && cdata.dump_macros)
821 save_rle_decoder (gstring,
823 cdata.dump_gtypes ? "guint" : "unsigned int",
824 cdata.dump_gtypes ? "guint8" : "unsigned char",
836 * gdk_pixbuf_new_from_inline:
837 * @data_length: Length in bytes of the @data argument or -1 to
838 * disable length checks
839 * @data: Byte data containing a serialized #GdkPixdata structure
840 * @copy_pixels: Whether to copy the pixel data, or use direct pointers
841 * @data for the resulting pixbuf
842 * @error: #GError return location, may be %NULL to ignore errors
844 * Create a #GdkPixbuf from a flat representation that is suitable for
845 * storing as inline data in a program. This is useful if you want to
846 * ship a program with images, but don't want to depend on any
849 * GTK+ ships with a program called <command>gdk-pixbuf-csource</command>
850 * which allows for conversion of #GdkPixbufs into such a inline representation.
851 * In almost all cases, you should pass the <option>--raw</option> flag to
852 * <command>gdk-pixbuf-csource</command>. A sample invocation would be:
854 * <informalexample><programlisting>
855 * gdk-pixbuf-csource --raw --name=myimage_inline myimage.png
856 * </programlisting></informalexample>
858 * For the typical case where the inline pixbuf is read-only static data,
859 * you don't need to copy the pixel data unless you intend to write to
860 * it, so you can pass %FALSE for @copy_pixels. (If you pass
861 * <option>--rle</option> to <command>gdk-pixbuf-csource</command>, a copy
862 * will be made even if @copy_pixels is %FALSE, so using this option is
863 * generally a bad idea.)
865 * If you create a pixbuf from const inline data compiled into your
866 * program, it's probably safe to ignore errors and disable length checks,
867 * since things will always succeed:
868 * <informalexample><programlisting>
869 * pixbuf = gdk_pixbuf_new_from_inline (-1, myimage_inline, FALSE, NULL);
870 * </programlisting></informalexample>
872 * For non-const inline data, you could get out of memory. For untrusted
873 * inline data located at runtime, you could have corrupt inline data in
876 * Return value: A newly-created #GdkPixbuf structure with a reference,
877 * count of 1, or %NULL if an error occurred.
880 gdk_pixbuf_new_from_inline (gint data_length,
882 gboolean copy_pixels,
887 if (data_length != -1)
888 g_return_val_if_fail (data_length > GDK_PIXDATA_HEADER_LENGTH, NULL);
889 g_return_val_if_fail (data != NULL, NULL);
891 if (!gdk_pixdata_deserialize (&pixdata, data_length, data, error))
894 return gdk_pixbuf_from_pixdata (&pixdata, copy_pixels, error);