/* pngwrite.c - general routines to write a PNG file
*
- * Copyright (c) 2018-2019 Cosmin Truta
+ * Copyright (c) 2018-2023 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
* library. If you have a new chunk to add, make a function to write it,
* and put it in the correct location here. If you want the chunk written
* after the image data, put it in png_write_end(). I strongly encourage
- * you to supply a PNG_INFO_ flag, and check info_ptr->valid before writing
- * the chunk, as that will keep the code from breaking if you want to just
- * write a plain PNG file. If you have long comments, I suggest writing
- * them in png_write_end(), and compressing them.
+ * you to supply a PNG_INFO_<chunk> flag, and check info_ptr->valid before
+ * writing the chunk, as that will keep the code from breaking if you want
+ * to just write a plain PNG file. If you have long comments, I suggest
+ * writing them in png_write_end(), and compressing them.
*/
void PNGAPI
png_write_info_before_PLTE(png_structrp png_ptr, png_const_inforp info_ptr)
* the application continues writing the PNG. So check the 'invalid'
* flag here too.
*/
+#ifdef PNG_WRITE_APNG_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_acTL)
+ png_write_acTL(png_ptr, info_ptr->num_frames, info_ptr->num_plays);
+#endif
#ifdef PNG_GAMMA_SUPPORTED
# ifdef PNG_WRITE_gAMA_SUPPORTED
if ((info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) == 0 &&
#ifdef PNG_WRITE_eXIf_SUPPORTED
if ((info_ptr->valid & PNG_INFO_eXIf) != 0)
+ {
png_write_eXIf(png_ptr, info_ptr->exif, info_ptr->num_exif);
+ png_ptr->mode |= PNG_WROTE_eXIf;
+ }
#endif
#ifdef PNG_WRITE_hIST_SUPPORTED
png_benign_error(png_ptr, "Wrote palette index exceeding num_palette");
#endif
+#ifdef PNG_WRITE_APNG_SUPPORTED
+ if (png_ptr->num_frames_written != png_ptr->num_frames_to_write)
+ png_error(png_ptr, "Not enough frames written");
+#endif
+
/* See if user wants us to write information chunks */
if (info_ptr != NULL)
{
#endif
#ifdef PNG_WRITE_eXIf_SUPPORTED
- if ((info_ptr->valid & PNG_INFO_eXIf) != 0)
- png_write_eXIf(png_ptr, info_ptr->exif, info_ptr->num_exif);
+ if ((info_ptr->valid & PNG_INFO_eXIf) != 0 &&
+ (png_ptr->mode & PNG_WROTE_eXIf) == 0)
+ png_write_eXIf(png_ptr, info_ptr->exif, info_ptr->num_exif);
#endif
#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
png_debug(1, "in png_convert_from_time_t");
tbuf = gmtime(&ttime);
+ if (tbuf == NULL)
+ {
+ /* TODO: add a safe function which takes a png_ptr argument and raises
+ * a png_error if the ttime argument is invalid and the call to gmtime
+ * fails as a consequence.
+ */
+ memset(ptime, 0, sizeof(*ptime));
+ return;
+ }
+
png_convert_from_struct_tm(ptime, tbuf);
}
#endif
case 7: png_app_error(png_ptr, "Unknown row filter for method 0");
#endif /* WRITE_FILTER */
/* FALLTHROUGH */
+#ifdef __TIZEN__
+ /* 'switch ~ case' is dead code.
+ * If filters is #PNG_FILTER_VALUE_NONE, #PNG_FILTER_VALUE_SUB ...,
+ * filter flag will be assigned to 'png_ptr->do_filter'. But
+ * 'png_ptr->do_filter' is overwritten as 'filters' at below code.
+ * Issue code(#1155) is 'png_ptr->do_filter = (png_byte)filters;'.
+ * So the result of 'switch ~ case' has been lost at the line.
+ * To keep the value of 'switch ~ case', we fixed it to apply
+ * the result into 'filters'.
+ * It will be updated into 'png_ptr->do_filter' at #1155 line.
+ */
+ case PNG_FILTER_VALUE_NONE:
+ filters = PNG_FILTER_NONE; break;
+#else
case PNG_FILTER_VALUE_NONE:
png_ptr->do_filter = PNG_FILTER_NONE; break;
+#endif /* __TIZEN__ */
#ifdef PNG_WRITE_FILTER_SUPPORTED
+#ifdef __TIZEN__
+ case PNG_FILTER_VALUE_SUB:
+ filters = PNG_FILTER_SUB; break;
+
+ case PNG_FILTER_VALUE_UP:
+ filters = PNG_FILTER_UP; break;
+
+ case PNG_FILTER_VALUE_AVG:
+ filters = PNG_FILTER_AVG; break;
+
+ case PNG_FILTER_VALUE_PAETH:
+ filters = PNG_FILTER_PAETH; break;
+#else
case PNG_FILTER_VALUE_SUB:
png_ptr->do_filter = PNG_FILTER_SUB; break;
case PNG_FILTER_VALUE_PAETH:
png_ptr->do_filter = PNG_FILTER_PAETH; break;
-
+#endif /* __TIZEN__ */
default:
png_ptr->do_filter = (png_byte)filters; break;
#else
}
#endif
+#ifdef PNG_WRITE_APNG_SUPPORTED
+void PNGAPI
+png_write_frame_head(png_structp png_ptr, png_infop info_ptr,
+ png_bytepp row_pointers, png_uint_32 width, png_uint_32 height,
+ png_uint_32 x_offset, png_uint_32 y_offset,
+ png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op,
+ png_byte blend_op)
+{
+ png_debug(1, "in png_write_frame_head");
+
+ /* there is a chance this has been set after png_write_info was called,
+ * so it would be set but not written. is there a way to be sure? */
+ if (!(info_ptr->valid & PNG_INFO_acTL))
+ png_error(png_ptr, "png_write_frame_head(): acTL not set");
+
+ png_write_reset(png_ptr);
+
+ png_write_reinit(png_ptr, info_ptr, width, height);
+
+ if ( !(png_ptr->num_frames_written == 0 &&
+ (png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN) ) )
+ png_write_fcTL(png_ptr, width, height, x_offset, y_offset,
+ delay_num, delay_den, dispose_op, blend_op);
+
+ PNG_UNUSED(row_pointers)
+}
+
+void PNGAPI
+png_write_frame_tail(png_structp png_ptr, png_infop info_ptr)
+{
+ png_debug(1, "in png_write_frame_tail");
+
+ png_ptr->num_frames_written++;
+
+ PNG_UNUSED(info_ptr)
+}
+#endif /* PNG_WRITE_APNG_SUPPORTED */
#ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED
/* Initialize the write structure - general purpose utility. */
projects / platform / upstream / libpng.git / blobdiff