SF.net SVN: alleg:[14990] allegro/branches/5.1/addons/image/png.c

[<tr...@us...>]

Revision: 14990
          http://alleg.svn.sourceforge.net/alleg/?rev=14990&view=rev
Author:   trentg
Date:     2011-08-23 20:55:08 +0000 (Tue, 23 Aug 2011)
Log Message:
-----------
Add some extra logging to PNG loader

Modified Paths:
--------------
    allegro/branches/5.1/addons/image/png.c

Modified: allegro/branches/5.1/addons/image/png.c
===================================================================
--- allegro/branches/5.1/addons/image/png.c	2011-08-23 17:57:17 UTC (rev 14989)
+++ allegro/branches/5.1/addons/image/png.c	2011-08-23 20:55:08 UTC (rev 14990)
@@ -201,6 +201,7 @@
 
    bmp = al_create_bitmap(width, height);
    if (!bmp) {
+      ALLEGRO_ERROR("al_create_bitmap failed while loading PNG.\n");
       return NULL;
    }
 
@@ -324,6 +325,7 @@
    ASSERT(fp);
 
    if (!check_if_png(fp)) {
+      ALLEGRO_ERROR("Not a png.\n");
       return NULL;
    }
 
@@ -336,6 +338,7 @@
    png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,
                                     (void *)NULL, NULL, NULL);
    if (!png_ptr) {
+      ALLEGRO_ERROR("png_ptr == NULL\n");
       return NULL;
    }
 
@@ -343,6 +346,7 @@
    info_ptr = png_create_info_struct(png_ptr);
    if (!info_ptr) {
       png_destroy_read_struct(&png_ptr, (png_infopp) NULL, (png_infopp) NULL);
+      ALLEGRO_ERROR("png_create_info_struct failed\n");
       return NULL;
    }
 
@@ -351,6 +355,7 @@
       /* Free all of the memory associated with the png_ptr and info_ptr */
       png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp) NULL);
       /* If we get here, we had a problem reading the file */
+      ALLEGRO_ERROR("Error reading PNG file\n");
       return NULL;
    }
    png_set_error_fn(png_ptr, jmpbuf, user_error_fn, NULL);

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