[devel] Made use of whitespace around debug statements consistent.

example.c

@@ -2,7 +2,7 @@
 #if 0 /* in case someone actually tries to compile this */
 
 /* example.c - an example of using libpng
- * Last changed in libpng 1.4.0 [August 13, 2009]
+ * Last changed in libpng 1.4.0 [August 15, 2009]
  * This file has been placed in the public domain by the authors.
  * Maintained 1998-2009 Glenn Randers-Pehrson
  * Maintained 1996, 1997 Andreas Dilger)

png.c

@@ -1,7 +1,7 @@
 
 /* png.c - location for general purpose libpng functions
  *
- * Last changed in libpng 1.4.0 [August 13, 2009]
+ * Last changed in libpng 1.4.0 [August 15, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -97,7 +97,9 @@ png_set_sig_bytes(png_structp png_ptr, int num_bytes)
 {
    if (png_ptr == NULL)
       return;
+
    png_debug(1, "in png_set_sig_bytes");
+
    if (num_bytes > 8)
       png_error(png_ptr, "Too many bytes for PNG signature");
 
@@ -212,6 +214,7 @@ png_create_info_struct(png_structp png_ptr)
    png_infop info_ptr;
 
    png_debug(1, "in png_create_info_struct");
+
    if (png_ptr == NULL)
       return (NULL);
 #ifdef PNG_USER_MEM_SUPPORTED
@@ -239,6 +242,7 @@ png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr)
       return;
 
    png_debug(1, "in png_destroy_info_struct");
+
    if (info_ptr_ptr != NULL)
       info_ptr = *info_ptr_ptr;
 
@@ -288,6 +292,7 @@ png_data_freer(png_structp png_ptr, png_infop info_ptr,
    int freer, png_uint_32 mask)
 {
    png_debug(1, "in png_data_freer");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
    if (freer == PNG_DESTROY_WILL_FREE_DATA)
@@ -305,6 +310,7 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
    int num)
 {
    png_debug(1, "in png_free_data");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
@@ -596,6 +602,7 @@ void PNGAPI
 png_init_io(png_structp png_ptr, png_FILE_p fp)
 {
    png_debug(1, "in png_init_io");
+
    if (png_ptr == NULL)
       return;
    png_ptr->io_ptr = (png_voidp)fp;
@@ -652,13 +659,13 @@ png_get_copyright(png_structp png_ptr)
 #else
 #ifdef __STDC__
    return ((png_charp) PNG_STRING_NEWLINE \
-     "libpng version x 1.4.0beta75 - August 13, 2009" PNG_STRING_NEWLINE \
+     "libpng version x 1.4.0beta75 - August 15, 2009" PNG_STRING_NEWLINE \
      "Copyright (c) 1998-2009 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
      "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
      "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
      PNG_STRING_NEWLINE);
 #else
-      return ((png_charp) "libpng version 1.4.0beta75 - August 13, 2009\
+      return ((png_charp) "libpng version 1.4.0beta75 - August 15, 2009\
       Copyright (c) 1998-2009 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.");
@@ -811,6 +818,7 @@ png_check_cHRM_fixed(png_structp png_ptr,
    unsigned long xy_hi,xy_lo,yx_hi,yx_lo;
 
    png_debug(1, "in function png_check_cHRM_fixed");
+
    if (png_ptr == NULL)
       return 0;
 

pngerror.c

@@ -1,7 +1,7 @@
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *
- * Last changed in libpng 1.4.0 [August 13, 2009]
+ * Last changed in libpng 1.4.0 [August 15, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

pngget.c

@@ -1,7 +1,7 @@
 
 /* pngget.c - retrieval of values from info struct
  *
- * Last changed in libpng 1.4.0 [August 13, 2009]
+ * Last changed in libpng 1.4.0 [August 15, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -187,6 +187,7 @@ png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
    if (info_ptr->valid & PNG_INFO_pHYs)
    {
       png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio");
+
       if (info_ptr->x_pixels_per_unit == 0)
          return ((float)0.0);
       else
@@ -334,6 +335,7 @@ png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr,
    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
    {
       png_debug1(1, "in %s retrieval function", "pHYs");
+
       if (res_x != NULL)
       {
          *res_x = info_ptr->x_pixels_per_unit;
@@ -391,6 +393,7 @@ png_get_bKGD(png_structp png_ptr, png_infop info_ptr,
       && background != NULL)
    {
       png_debug1(1, "in %s retrieval function", "bKGD");
+
       *background = &(info_ptr->background);
       return (PNG_INFO_bKGD);
    }
@@ -408,6 +411,7 @@ png_get_cHRM(png_structp png_ptr, png_infop info_ptr,
    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
    {
       png_debug1(1, "in %s retrieval function", "cHRM");
+
       if (white_x != NULL)
          *white_x = (double)info_ptr->x_white;
       if (white_y != NULL)
@@ -439,6 +443,7 @@ png_get_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
    {
       png_debug1(1, "in %s retrieval function", "cHRM");
+
       if (white_x != NULL)
          *white_x = info_ptr->int_x_white;
       if (white_y != NULL)
@@ -471,6 +476,7 @@ png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma)
       && file_gamma != NULL)
    {
       png_debug1(1, "in %s retrieval function", "gAMA");
+
       *file_gamma = (double)info_ptr->gamma;
       return (PNG_INFO_gAMA);
    }
@@ -486,6 +492,7 @@ png_get_gAMA_fixed(png_structp png_ptr, png_infop info_ptr,
       && int_file_gamma != NULL)
    {
       png_debug1(1, "in %s retrieval function", "gAMA");
+
       *int_file_gamma = info_ptr->int_gamma;
       return (PNG_INFO_gAMA);
    }
@@ -502,6 +509,7 @@ png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent)
       && file_srgb_intent != NULL)
    {
       png_debug1(1, "in %s retrieval function", "sRGB");
+
       *file_srgb_intent = (int)info_ptr->srgb_intent;
       return (PNG_INFO_sRGB);
    }
@@ -519,6 +527,7 @@ png_get_iCCP(png_structp png_ptr, png_infop info_ptr,
       && name != NULL && profile != NULL && proflen != NULL)
    {
       png_debug1(1, "in %s retrieval function", "iCCP");
+
       *name = info_ptr->iccp_name;
       *profile = info_ptr->iccp_profile;
       /* Compression_type is a dummy so the API won't have to change
@@ -554,6 +563,7 @@ png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist)
       && hist != NULL)
    {
       png_debug1(1, "in %s retrieval function", "hIST");
+
       *hist = info_ptr->hist;
       return (PNG_INFO_hIST);
    }
@@ -572,6 +582,7 @@ png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
       bit_depth != NULL && color_type != NULL)
    {
       png_debug1(1, "in %s retrieval function", "IHDR");
+
       *width = info_ptr->width;
       *height = info_ptr->height;
       *bit_depth = info_ptr->bit_depth;
@@ -624,6 +635,7 @@ png_get_oFFs(png_structp png_ptr, png_infop info_ptr,
       && offset_x != NULL && offset_y != NULL && unit_type != NULL)
    {
       png_debug1(1, "in %s retrieval function", "oFFs");
+
       *offset_x = info_ptr->x_offset;
       *offset_y = info_ptr->y_offset;
       *unit_type = (int)info_ptr->offset_unit_type;
@@ -644,6 +656,7 @@ png_get_pCAL(png_structp png_ptr, png_infop info_ptr,
        nparams != NULL && units != NULL && params != NULL)
    {
       png_debug1(1, "in %s retrieval function", "pCAL");
+
       *purpose = info_ptr->pcal_purpose;
       *X0 = info_ptr->pcal_X0;
       *X1 = info_ptr->pcal_X1;
@@ -735,6 +748,7 @@ png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette,
        && palette != NULL)
    {
       png_debug1(1, "in %s retrieval function", "PLTE");
+
       *palette = info_ptr->palette;
       *num_palette = info_ptr->num_palette;
       png_debug1(3, "num_palette = %d", *num_palette);
@@ -751,6 +765,7 @@ png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit)
       && sig_bit != NULL)
    {
       png_debug1(1, "in %s retrieval function", "sBIT");
+
       *sig_bit = &(info_ptr->sig_bit);
       return (PNG_INFO_sBIT);
    }
@@ -791,6 +806,7 @@ png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
        && mod_time != NULL)
    {
       png_debug1(1, "in %s retrieval function", "tIME");
+
       *mod_time = &(info_ptr->mod_time);
       return (PNG_INFO_tIME);
    }
@@ -807,6 +823,7 @@ png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
    if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
    {
       png_debug1(1, "in %s retrieval function", "tRNS");
+
       if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
       {
           if (trans_alpha != NULL)

pngmem.c

@@ -1,7 +1,7 @@
 
 /* pngmem.c - stub functions for memory allocation
  *
- * Last changed in libpng 1.4.0 [August 13, 2009]
+ * Last changed in libpng 1.4.0 [August 15, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

pngpread.c

@@ -1,7 +1,7 @@
 
 /* pngpread.c - read a png file in push mode
  *
- * Last changed in libpng 1.4.0 [August 13, 2009]
+ * Last changed in libpng 1.4.0 [August 15, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

pngread.c

@@ -1,7 +1,7 @@
 
 /* pngread.c - read a PNG file
  *
- * Last changed in libpng 1.4.0 [August 13, 2009]
+ * Last changed in libpng 1.4.0 [August 15, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -53,6 +53,7 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
    int i;
 
    png_debug(1, "in png_create_read_struct");
+
 #ifdef PNG_USER_MEM_SUPPORTED
    png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
       malloc_fn, mem_ptr);
@@ -200,7 +201,9 @@ png_read_info(png_structp png_ptr, png_infop info_ptr)
 {
    if (png_ptr == NULL || info_ptr == NULL)
       return;
+ 
    png_debug(1, "in png_read_info");
+ 
    /* If we haven't checked all of the PNG signature bytes, do so now. */
    if (png_ptr->sig_bytes < 8)
    {
@@ -411,6 +414,7 @@ void PNGAPI
 png_read_update_info(png_structp png_ptr, png_infop info_ptr)
 {
    png_debug(1, "in png_read_update_info");
+ 
    if (png_ptr == NULL)
       return;
    if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
@@ -431,6 +435,7 @@ void PNGAPI
 png_start_read_image(png_structp png_ptr)
 {
    png_debug(1, "in png_start_read_image");
+ 
    if (png_ptr == NULL)
       return;
    if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
@@ -451,7 +456,9 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
    int ret;
    if (png_ptr == NULL)
       return;
+ 
    png_debug2(1, "in png_read_row (row %lu, pass %d)",
+ 
       (unsigned long) png_ptr->row_number, png_ptr->pass);
    if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
       png_read_start_row(png_ptr);
@@ -702,6 +709,7 @@ png_read_rows(png_structp png_ptr, png_bytepp row,
    png_bytepp dp;
 
    png_debug(1, "in png_read_rows");
+ 
    if (png_ptr == NULL)
       return;
    rp = row;
@@ -752,6 +760,7 @@ png_read_image(png_structp png_ptr, png_bytepp image)
    png_bytepp rp;
 
    png_debug(1, "in png_read_image");
+ 
    if (png_ptr == NULL)
       return;
 
@@ -789,6 +798,7 @@ void PNGAPI
 png_read_end(png_structp png_ptr, png_infop info_ptr)
 {
    png_debug(1, "in png_read_end");
+ 
    if (png_ptr == NULL)
       return;
    png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */
@@ -970,6 +980,7 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
 #endif
 
    png_debug(1, "in png_destroy_read_struct");
+ 
    if (png_ptr_ptr != NULL)
       png_ptr = *png_ptr_ptr;
    if (png_ptr == NULL)
@@ -1044,6 +1055,7 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
 #endif
 
    png_debug(1, "in png_read_destroy");
+ 
    if (info_ptr != NULL)
       png_info_destroy(png_ptr, info_ptr);
 

pngrio.c

@@ -1,7 +1,7 @@
 
 /* pngrio.c - functions for data input
  *
- * Last changed in libpng 1.4.0 [August 13, 2009]
+ * Last changed in libpng 1.4.0 [August 15, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -32,6 +32,7 @@ void /* PRIVATE */
 png_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
 {
    png_debug1(4, "reading %d bytes", (int)length);
+ 
    if (png_ptr->read_data_fn != NULL)
       (*(png_ptr->read_data_fn))(png_ptr, data, length);
    else

pngrtran.c

@@ -1,7 +1,7 @@
 
 /* pngrtran.c - transforms the data in a row for PNG readers
  *
- * Last changed in libpng 1.4.0 [August 13, 2009]
+ * Last changed in libpng 1.4.0 [August 15, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -25,9 +25,11 @@ void PNGAPI
 png_set_crc_action(png_structp png_ptr, int crit_action, int ancil_action)
 {
    png_debug(1, "in png_set_crc_action");
-   /* Tell libpng how we react to CRC errors in critical chunks */
+ 
    if (png_ptr == NULL)
       return;
+
+   /* Tell libpng how we react to CRC errors in critical chunks */
    switch (crit_action)
    {
       case PNG_CRC_NO_CHANGE:                        /* Leave setting as is */
@@ -55,6 +57,7 @@ png_set_crc_action(png_structp png_ptr, int crit_action, int ancil_action)
          break;
    }
 
+   /* Tell libpng how we react to CRC errors in ancillary chunks */
    switch (ancil_action)
    {
       case PNG_CRC_NO_CHANGE:                       /* Leave setting as is */
@@ -94,6 +97,7 @@ png_set_background(png_structp png_ptr,
    int need_expand, double background_gamma)
 {
    png_debug(1, "in png_set_background");
+ 
    if (png_ptr == NULL)
       return;
    if (background_gamma_code == PNG_BACKGROUND_GAMMA_UNKNOWN)
@@ -117,6 +121,7 @@ void PNGAPI
 png_set_strip_16(png_structp png_ptr)
 {
    png_debug(1, "in png_set_strip_16");
+
    if (png_ptr == NULL)
       return;
    png_ptr->transformations |= PNG_16_TO_8;
@@ -128,6 +133,7 @@ void PNGAPI
 png_set_strip_alpha(png_structp png_ptr)
 {
    png_debug(1, "in png_set_strip_alpha");
+
    if (png_ptr == NULL)
       return;
    png_ptr->flags |= PNG_FLAG_STRIP_ALPHA;
@@ -139,6 +145,7 @@ void PNGAPI
 png_set_premultiply_alpha(png_structp png_ptr)
 {
    png_debug(1, "in png_set_premultiply_alpha");
+
    if(png_ptr == NULL)
       return;
    png_ptr->transformations |=
@@ -174,6 +181,7 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
    int full_dither)
 {
    png_debug(1, "in png_set_dither");
+
    if (png_ptr == NULL)
       return;
    png_ptr->transformations |= PNG_DITHER;
@@ -570,6 +578,7 @@ void PNGAPI
 png_set_gamma(png_structp png_ptr, double scrn_gamma, double file_gamma)
 {
    png_debug(1, "in png_set_gamma");
+
    if (png_ptr == NULL)
       return;
    if ((fabs(scrn_gamma * file_gamma - 1.0) > PNG_GAMMA_THRESHOLD) ||
@@ -590,6 +599,7 @@ void PNGAPI
 png_set_expand(png_structp png_ptr)
 {
    png_debug(1, "in png_set_expand");
+
    if (png_ptr == NULL)
       return;
    png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
@@ -618,6 +628,7 @@ void PNGAPI
 png_set_palette_to_rgb(png_structp png_ptr)
 {
    png_debug(1, "in png_set_palette_to_rgb");
+
    if (png_ptr == NULL)
       return;
    png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
@@ -629,6 +640,7 @@ void PNGAPI
 png_set_expand_gray_1_2_4_to_8(png_structp png_ptr)
 {
    png_debug(1, "in png_set_expand_gray_1_2_4_to_8");
+
    if (png_ptr == NULL)
       return;
    png_ptr->transformations |= PNG_EXPAND;
@@ -642,6 +654,7 @@ void PNGAPI
 png_set_tRNS_to_alpha(png_structp png_ptr)
 {
    png_debug(1, "in png_set_tRNS_to_alpha");
+
    png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
    png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
 }
@@ -652,6 +665,7 @@ void PNGAPI
 png_set_gray_to_rgb(png_structp png_ptr)
 {
    png_debug(1, "in png_set_gray_to_rgb");
+
    png_ptr->transformations |= PNG_GRAY_TO_RGB;
    png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
 }
@@ -680,6 +694,7 @@ png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action,
    png_fixed_point red, png_fixed_point green)
 {
    png_debug(1, "in png_set_rgb_to_gray");
+
    if (png_ptr == NULL)
       return;
    switch(error_action)
@@ -735,6 +750,7 @@ png_set_read_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
    read_user_transform_fn)
 {
    png_debug(1, "in png_set_read_user_transform_fn");
+
    if (png_ptr == NULL)
       return;
 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
@@ -751,6 +767,7 @@ void /* PRIVATE */
 png_init_read_transformations(png_structp png_ptr)
 {
    png_debug(1, "in png_init_read_transformations");
+
   {
 #if defined(PNG_READ_BACKGROUND_SUPPORTED) || defined(PNG_READ_SHIFT_SUPPORTED) \
  || defined(PNG_READ_GAMMA_SUPPORTED)
@@ -1164,6 +1181,7 @@ void /* PRIVATE */
 png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
 {
    png_debug(1, "in png_read_transform_info");
+
 #if defined(PNG_READ_EXPAND_SUPPORTED)
    if (png_ptr->transformations & PNG_EXPAND)
    {
@@ -1302,6 +1320,7 @@ void /* PRIVATE */
 png_do_read_transformations(png_structp png_ptr)
 {
    png_debug(1, "in png_do_read_transformations");
+
    if (png_ptr->row_buf == NULL)
    {
 #if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
@@ -1557,6 +1576,7 @@ void /* PRIVATE */
 png_do_unpack(png_row_infop row_info, png_bytep row)
 {
    png_debug(1, "in png_do_unpack");
+
    if (row_info->bit_depth < 8)
    {
       png_uint_32 i;
@@ -1645,6 +1665,7 @@ void /* PRIVATE */
 png_do_unshift(png_row_infop row_info, png_bytep row, png_color_8p sig_bits)
 {
    png_debug(1, "in png_do_unshift");
+
    if (
        row_info->color_type != PNG_COLOR_TYPE_PALETTE)
    {
@@ -1751,6 +1772,7 @@ void /* PRIVATE */
 png_do_chop(png_row_infop row_info, png_bytep row)
 {
    png_debug(1, "in png_do_chop");
+
    if (row_info->bit_depth == 16)
    {
       png_bytep sp = row;
@@ -1804,6 +1826,7 @@ void /* PRIVATE */
 png_do_read_swap_alpha(png_row_infop row_info, png_bytep row)
 {
    png_debug(1, "in png_do_read_swap_alpha");
+
    {
       png_uint_32 row_width = row_info->width;
       if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
@@ -1893,6 +1916,7 @@ void /* PRIVATE */
 png_do_read_invert_alpha(png_row_infop row_info, png_bytep row)
 {
    png_debug(1, "in png_do_read_invert_alpha");
+
    {
       png_uint_32 row_width = row_info->width;
       if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
@@ -1988,6 +2012,7 @@ void /* PRIVATE */
 png_do_read_premultiply_alpha(png_row_infop row_info, png_bytep row)
 {
    png_debug(1, "in png_do_read_premultiply_alpha");
+
    {
       png_uint_32 row_width = row_info->width;
       if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
@@ -2074,6 +2099,7 @@ png_do_read_filler(png_row_infop row_info, png_bytep row,
    png_byte lo_filler = (png_byte)(filler & 0xff);
 
    png_debug(1, "in png_do_read_filler");
+
    if (
        row_info->color_type == PNG_COLOR_TYPE_GRAY)
    {
@@ -2243,6 +2269,7 @@ png_do_gray_to_rgb(png_row_infop row_info, png_bytep row)
    png_uint_32 row_width = row_info->width;
 
    png_debug(1, "in png_do_gray_to_rgb");
+
    if (row_info->bit_depth >= 8 &&
       !(row_info->color_type & PNG_COLOR_MASK_COLOR))
    {
@@ -2346,6 +2373,7 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row)
    int rgb_error = 0;
 
    png_debug(1, "in png_do_rgb_to_gray");
+
    if (
       (row_info->color_type & PNG_COLOR_MASK_COLOR))
    {
@@ -2581,6 +2609,7 @@ png_build_grayscale_palette(int bit_depth, png_colorp palette)
    int v;
 
    png_debug(1, "in png_do_build_grayscale_palette");
+
    if (palette == NULL)
       return;
 
@@ -2643,6 +2672,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
    int shift;
 
    png_debug(1, "in png_do_background");
+
    if (background != NULL &&
       (!(row_info->color_type & PNG_COLOR_MASK_ALPHA) ||
       (row_info->color_type != PNG_COLOR_TYPE_PALETTE && trans_color)))
@@ -3329,6 +3359,7 @@ png_do_gamma(png_row_infop row_info, png_bytep row,
    png_uint_32 row_width=row_info->width;
 
    png_debug(1, "in png_do_gamma");
+
    if (
        ((row_info->bit_depth <= 8 && gamma_table != NULL) ||
         (row_info->bit_depth == 16 && gamma_16_table != NULL)))
@@ -3514,6 +3545,7 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row,
    png_uint_32 row_width=row_info->width;
 
    png_debug(1, "in png_do_expand_palette");
+
    if (
        row_info->color_type == PNG_COLOR_TYPE_PALETTE)
    {
@@ -3657,6 +3689,7 @@ png_do_expand(png_row_infop row_info, png_bytep row,
    png_uint_32 row_width=row_info->width;
 
    png_debug(1, "in png_do_expand");
+
    {
       if (row_info->color_type == PNG_COLOR_TYPE_GRAY)
       {
@@ -3865,6 +3898,7 @@ png_do_dither(png_row_infop row_info, png_bytep row,
    png_uint_32 row_width=row_info->width;
 
    png_debug(1, "in png_do_dither");
+
    {
       if (row_info->color_type == PNG_COLOR_TYPE_RGB &&
          palette_lookup && row_info->bit_depth == 8)
@@ -4227,6 +4261,7 @@ void /* PRIVATE */
 png_do_read_intrapixel(png_row_infop row_info, png_bytep row)
 {
    png_debug(1, "in png_do_read_intrapixel");
+
    if (
        (row_info->color_type & PNG_COLOR_MASK_COLOR))
    {

pngrutil.c

@@ -1,7 +1,7 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.4.0 [August 13, 2009]
+ * Last changed in libpng 1.4.0 [August 15, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

pngset.c

@@ -1,7 +1,7 @@
 
 /* pngset.c - storage of image information into info struct
  *
- * Last changed in libpng 1.4.0 [August 13, 2009]
+ * Last changed in libpng 1.4.0 [August 15, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -25,6 +25,7 @@ void PNGAPI
 png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
 {
    png_debug1(1, "in %s storage function", "bKGD");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
@@ -41,6 +42,7 @@ png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
    double green_x, double green_y, double blue_x, double blue_y)
 {
    png_debug1(1, "in %s storage function", "cHRM");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
@@ -74,6 +76,7 @@ png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
    png_fixed_point blue_x, png_fixed_point blue_y)
 {
    png_debug1(1, "in %s storage function", "cHRM fixed");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
@@ -112,7 +115,9 @@ void PNGAPI
 png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
 {
    double png_gamma;
+
    png_debug1(1, "in %s storage function", "gAMA");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
@@ -140,6 +145,7 @@ png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
    png_fixed_point png_gamma;
 
    png_debug1(1, "in %s storage function", "gAMA");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
@@ -177,6 +183,7 @@ png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
    int i;
 
    png_debug1(1, "in %s storage function", "hIST");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
    if (info_ptr->num_palette == 0 || info_ptr->num_palette
@@ -221,6 +228,7 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
    int filter_type)
 {
    png_debug1(1, "in %s storage function", "IHDR");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
@@ -328,6 +336,7 @@ png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
    png_int_32 offset_x, png_int_32 offset_y, int unit_type)
 {
    png_debug1(1, "in %s storage function", "oFFs");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
@@ -348,6 +357,7 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
    int i;
 
    png_debug1(1, "in %s storage function", "pCAL");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
@@ -417,6 +427,7 @@ png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
              int unit, double width, double height)
 {
    png_debug1(1, "in %s storage function", "sCAL");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
@@ -435,6 +446,7 @@ png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
    png_size_t length;
 
    png_debug1(1, "in %s storage function", "sCAL");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
@@ -480,6 +492,7 @@ png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
    png_uint_32 res_x, png_uint_32 res_y, int unit_type)
 {
    png_debug1(1, "in %s storage function", "pHYs");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
@@ -496,6 +509,7 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
 {
 
    png_debug1(1, "in %s storage function", "PLTE");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
@@ -551,6 +565,7 @@ png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
    png_color_8p sig_bit)
 {
    png_debug1(1, "in %s storage function", "sBIT");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
@@ -564,6 +579,7 @@ void PNGAPI
 png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
 {
    png_debug1(1, "in %s storage function", "sRGB");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
@@ -591,6 +607,7 @@ png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
       int_green_y, int_blue_x, int_blue_y;
 #endif
    png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
@@ -660,6 +677,7 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
    png_uint_32 length;
 
    png_debug1(1, "in %s storage function", "iCCP");
+
    if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
       return;
 
@@ -874,6 +892,7 @@ void PNGAPI
 png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
 {
    png_debug1(1, "in %s storage function", "tIME");
+
    if (png_ptr == NULL || info_ptr == NULL ||
        (png_ptr->mode & PNG_WROTE_tIME))
       return;
@@ -889,6 +908,7 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
    png_bytep trans_alpha, int num_trans, png_color_16p trans_color)
 {
    png_debug1(1, "in %s storage function", "tRNS");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
@@ -1090,6 +1110,7 @@ png_uint_32 PNGAPI
 png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
 {
    png_debug(1, "in png_permit_mng_features");
+
    if (png_ptr == NULL)
       return (png_uint_32)0;
    png_ptr->mng_features_permitted =
@@ -1151,6 +1172,7 @@ png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
    png_user_chunk_ptr read_user_chunk_fn)
 {
    png_debug(1, "in png_set_read_user_chunk_fn");
+
    if (png_ptr == NULL)
       return;
    png_ptr->read_user_chunk_fn = read_user_chunk_fn;
@@ -1235,6 +1257,7 @@ void PNGAPI
 png_set_benign_errors(png_structp png_ptr, int allowed)
 {
    png_debug(1, "in png_set_benign_errors");
+
    if (allowed)
       png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN;
    else

pngtest.c

@@ -1,7 +1,7 @@
 
 /* pngtest.c - a simple test program to test libpng
  *
- * Last changed in libpng 1.4.0 [August 13, 2009]
+ * Last changed in libpng 1.4.0 [August 15, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

pngtrans.c

@@ -1,7 +1,7 @@
 
 /* pngtrans.c - transforms the data in a row (used by both readers and writers)
  *
- * Last changed in libpng 1.4.0 [August 13, 2009]
+ * Last changed in libpng 1.4.0 [August 15, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -21,6 +21,7 @@ void PNGAPI
 png_set_bgr(png_structp png_ptr)
 {
    png_debug(1, "in png_set_bgr");
+
    if (png_ptr == NULL)
       return;
    png_ptr->transformations |= PNG_BGR;
@@ -33,6 +34,7 @@ void PNGAPI
 png_set_swap(png_structp png_ptr)
 {
    png_debug(1, "in png_set_swap");
+
    if (png_ptr == NULL)
       return;
    if (png_ptr->bit_depth == 16)
@@ -46,6 +48,7 @@ void PNGAPI
 png_set_packing(png_structp png_ptr)
 {
    png_debug(1, "in png_set_packing");
+
    if (png_ptr == NULL)
       return;
    if (png_ptr->bit_depth < 8)
@@ -62,6 +65,7 @@ void PNGAPI
 png_set_packswap(png_structp png_ptr)
 {
    png_debug(1, "in png_set_packswap");
+
    if (png_ptr == NULL)
       return;
    if (png_ptr->bit_depth < 8)
@@ -74,6 +78,7 @@ void PNGAPI
 png_set_shift(png_structp png_ptr, png_color_8p true_bits)
 {
    png_debug(1, "in png_set_shift");
+
    if (png_ptr == NULL)
       return;
    png_ptr->transformations |= PNG_SHIFT;
@@ -87,6 +92,7 @@ int PNGAPI
 png_set_interlace_handling(png_structp png_ptr)
 {
    png_debug(1, "in png_set_interlace handling");
+
    if (png_ptr && png_ptr->interlaced)
    {
       png_ptr->transformations |= PNG_INTERLACE;
@@ -107,6 +113,7 @@ void PNGAPI
 png_set_filler(png_structp png_ptr, png_uint_32 filler, int filler_loc)
 {
    png_debug(1, "in png_set_filler");
+
    if (png_ptr == NULL)
       return;
    png_ptr->transformations |= PNG_FILLER;
@@ -140,6 +147,7 @@ void PNGAPI
 png_set_add_alpha(png_structp png_ptr, png_uint_32 filler, int filler_loc)
 {
    png_debug(1, "in png_set_add_alpha");
+
    if (png_ptr == NULL)
       return;
    png_set_filler(png_ptr, filler, filler_loc);
@@ -154,6 +162,7 @@ void PNGAPI
 png_set_swap_alpha(png_structp png_ptr)
 {
    png_debug(1, "in png_set_swap_alpha");
+
    if (png_ptr == NULL)
       return;
    png_ptr->transformations |= PNG_SWAP_ALPHA;
@@ -166,6 +175,7 @@ void PNGAPI
 png_set_invert_alpha(png_structp png_ptr)
 {
    png_debug(1, "in png_set_invert_alpha");
+
    if (png_ptr == NULL)
       return;
    png_ptr->transformations |= PNG_INVERT_ALPHA;
@@ -177,6 +187,7 @@ void PNGAPI
 png_set_invert_mono(png_structp png_ptr)
 {
    png_debug(1, "in png_set_invert_mono");
+
    if (png_ptr == NULL)
       return;
    png_ptr->transformations |= PNG_INVERT_MONO;
@@ -187,6 +198,7 @@ void /* PRIVATE */
 png_do_invert(png_row_infop row_info, png_bytep row)
 {
    png_debug(1, "in png_do_invert");
+
   /* This test removed from libpng version 1.0.13 and 1.2.0:
    *   if (row_info->bit_depth == 1 &&
    */
@@ -238,6 +250,7 @@ void /* PRIVATE */
 png_do_swap(png_row_infop row_info, png_bytep row)
 {
    png_debug(1, "in png_do_swap");
+
    if (
        row_info->bit_depth == 16)
    {
@@ -366,6 +379,7 @@ void /* PRIVATE */
 png_do_packswap(png_row_infop row_info, png_bytep row)
 {
    png_debug(1, "in png_do_packswap");
+
    if (
        row_info->bit_depth < 8)
    {
@@ -395,6 +409,7 @@ void /* PRIVATE */
 png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags)
 {
    png_debug(1, "in png_do_strip_filler");
+
    {
       png_bytep sp=row;
       png_bytep dp=row;
@@ -550,6 +565,7 @@ void /* PRIVATE */
 png_do_bgr(png_row_infop row_info, png_bytep row)
 {
    png_debug(1, "in png_do_bgr");
+
    if (
        (row_info->color_type & PNG_COLOR_MASK_COLOR))
    {
@@ -625,6 +641,7 @@ png_set_user_transform_info(png_structp png_ptr, png_voidp
    user_transform_ptr, int user_transform_depth, int user_transform_channels)
 {
    png_debug(1, "in png_set_user_transform_info");
+
    if (png_ptr == NULL)
       return;
 #if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)

pngwio.c

@@ -1,7 +1,7 @@
 
 /* pngwio.c - functions for data output
  *
- * Last changed in libpng 1.4.0 [August 13, 2009]
+ * Last changed in libpng 1.4.0 [August 15, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

pngwrite.c

@@ -1,7 +1,7 @@
 
 /* pngwrite.c - general routines to write a PNG file
  *
- * Last changed in libpng 1.4.0 [August 13, 2009]
+ * Last changed in libpng 1.4.0 [August 15, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -29,6 +29,7 @@ void PNGAPI
 png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
 {
    png_debug(1, "in png_write_info_before_PLTE");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
    if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
@@ -310,6 +311,7 @@ void PNGAPI
 png_write_end(png_structp png_ptr, png_infop info_ptr)
 {
    png_debug(1, "in png_write_end");
+
    if (png_ptr == NULL)
       return;
    if (!(png_ptr->mode & PNG_HAVE_IDAT))
@@ -423,6 +425,7 @@ void PNGAPI
 png_convert_from_struct_tm(png_timep ptime, struct tm FAR * ttime)
 {
    png_debug(1, "in png_convert_from_struct_tm");
+
    ptime->year = (png_uint_16)(1900 + ttime->tm_year);
    ptime->month = (png_byte)(ttime->tm_mon + 1);
    ptime->day = (png_byte)ttime->tm_mday;
@@ -437,6 +440,7 @@ png_convert_from_time_t(png_timep ptime, time_t ttime)
    struct tm *tbuf;
 
    png_debug(1, "in png_convert_from_time_t");
+
    tbuf = gmtime(&ttime);
    png_convert_from_struct_tm(ptime, tbuf);
 }
@@ -471,7 +475,9 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
 #endif
 #endif
    int i;
+
    png_debug(1, "in png_create_write_struct");
+
 #ifdef PNG_USER_MEM_SUPPORTED
    png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
       (png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr);
@@ -620,6 +626,7 @@ png_write_image(png_structp png_ptr, png_bytepp image)
       return;
 
    png_debug(1, "in png_write_image");
+
 #if defined(PNG_WRITE_INTERLACING_SUPPORTED)
    /* Initialize interlace handling.  If image is not interlaced,
     * this will set pass to 1
@@ -645,6 +652,7 @@ png_write_row(png_structp png_ptr, png_bytep row)
 {
    if (png_ptr == NULL)
       return;
+
    png_debug2(1, "in png_write_row (row %ld, pass %d)",
       png_ptr->row_number, png_ptr->pass);
 
@@ -820,6 +828,7 @@ void PNGAPI
 png_set_flush(png_structp png_ptr, int nrows)
 {
    png_debug(1, "in png_set_flush");
+
    if (png_ptr == NULL)
       return;
    png_ptr->flush_dist = (nrows < 0 ? 0 : nrows);
@@ -832,6 +841,7 @@ png_write_flush(png_structp png_ptr)
    int wrote_IDAT;
 
    png_debug(1, "in png_write_flush");
+
    if (png_ptr == NULL)
       return;
    /* We have already written out all of the data */
@@ -892,6 +902,7 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
 #endif
 
    png_debug(1, "in png_destroy_write_struct");
+
    if (png_ptr_ptr != NULL)
    {
       png_ptr = *png_ptr_ptr;
@@ -955,7 +966,7 @@ void /* PRIVATE */
 png_write_destroy(png_structp png_ptr)
 {
 #ifdef PNG_SETJMP_SUPPORTED
-   jmp_buf tmp_jmp; /* save jump buffer */
+   jmp_buf tmp_jmp; /* Save jump buffer */
 #endif
    png_error_ptr error_fn;
    png_error_ptr warning_fn;
@@ -965,10 +976,11 @@ png_write_destroy(png_structp png_ptr)
 #endif
 
    png_debug(1, "in png_write_destroy");
-   /* free any memory zlib uses */
+
+   /* Free any memory zlib uses */
    deflateEnd(&png_ptr->zstream);
 
-   /* free our memory.  png_free checks NULL for us. */
+   /* Free our memory.  png_free checks NULL for us. */
    png_free(png_ptr, png_ptr->zbuf);
    png_free(png_ptr, png_ptr->row_buf);
 #ifndef PNG_NO_WRITE_FILTER
@@ -1022,6 +1034,7 @@ void PNGAPI
 png_set_filter(png_structp png_ptr, int method, int filters)
 {
    png_debug(1, "in png_set_filter");
+
    if (png_ptr == NULL)
       return;
 #if defined(PNG_MNG_FEATURES_SUPPORTED)
@@ -1145,6 +1158,7 @@ png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
    int i;
 
    png_debug(1, "in png_set_filter_heuristics");
+
    if (png_ptr == NULL)
       return;
    if (heuristic_method >= PNG_FILTER_HEURISTIC_LAST)
@@ -1259,6 +1273,7 @@ void PNGAPI
 png_set_compression_level(png_structp png_ptr, int level)
 {
    png_debug(1, "in png_set_compression_level");
+
    if (png_ptr == NULL)
       return;
    png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_LEVEL;
@@ -1269,6 +1284,7 @@ void PNGAPI
 png_set_compression_mem_level(png_structp png_ptr, int mem_level)
 {
    png_debug(1, "in png_set_compression_mem_level");
+
    if (png_ptr == NULL)
       return;
    png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL;
@@ -1279,6 +1295,7 @@ void PNGAPI
 png_set_compression_strategy(png_structp png_ptr, int strategy)
 {
    png_debug(1, "in png_set_compression_strategy");
+
    if (png_ptr == NULL)
       return;
    png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_STRATEGY;
@@ -1310,6 +1327,7 @@ void PNGAPI
 png_set_compression_method(png_structp png_ptr, int method)
 {
    png_debug(1, "in png_set_compression_method");
+
    if (png_ptr == NULL)
       return;
    if (method != 8)
@@ -1332,6 +1350,7 @@ png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
    write_user_transform_fn)
 {
    png_debug(1, "in png_set_write_user_transform_fn");
+
    if (png_ptr == NULL)
       return;
    png_ptr->transformations |= PNG_USER_TRANSFORM;

pngwtran.c

@@ -1,7 +1,7 @@
 
 /* pngwtran.c - transforms the data in a row for PNG writers
  *
- * Last changed in libpng 1.4.0 [August 13, 2009]
+ * Last changed in libpng 1.4.0 [August 15, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -90,6 +90,7 @@ void /* PRIVATE */
 png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth)
 {
    png_debug(1, "in png_do_pack");
+
    if (row_info->bit_depth == 8 &&
       row_info->channels == 1)
    {
@@ -213,6 +214,7 @@ void /* PRIVATE */
 png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth)
 {
    png_debug(1, "in png_do_shift");
+
    if (
       row_info->color_type != PNG_COLOR_TYPE_PALETTE)
    {
@@ -333,6 +335,7 @@ void /* PRIVATE */
 png_do_write_swap_alpha(png_row_infop row_info, png_bytep row)
 {
    png_debug(1, "in png_do_write_swap_alpha");
+
    {
       if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
       {
@@ -418,6 +421,7 @@ void /* PRIVATE */
 png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
 {
    png_debug(1, "in png_do_write_invert_alpha");
+
    {
       if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
       {
@@ -505,6 +509,7 @@ void /* PRIVATE */
 png_do_write_intrapixel(png_row_infop row_info, png_bytep row)
 {
    png_debug(1, "in png_do_write_intrapixel");
+
    if (
        (row_info->color_type & PNG_COLOR_MASK_COLOR))
    {

pngwutil.c

@@ -1,7 +1,7 @@
 
 /* pngwutil.c - utilities to write a PNG file
  *
- * Last changed in libpng 1.4.0 [August 13, 2009]
+ * Last changed in libpng 1.4.0 [August 15, 2009]
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -107,6 +107,12 @@ png_write_chunk_start(png_structp png_ptr, png_bytep chunk_name,
 {
    png_byte buf[8];
 
+   png_debug2(0, "Writing %s chunk, length = %lu", chunk_name,
+      (unsigned long)length);
+
+   if (png_ptr == NULL)
+      return;
+
 #ifdef PNG_IO_STATE_SUPPORTED
    /* Inform the I/O callback that the chunk header is being written.
     * PNG_IO_CHUNK_HDR requires a single I/O call.
@@ -114,11 +120,6 @@ png_write_chunk_start(png_structp png_ptr, png_bytep chunk_name,
    png_ptr->io_state = PNG_IO_WRITING | PNG_IO_CHUNK_HDR;
 #endif
 
-   png_debug2(0, "Writing %s chunk, length = %lu", chunk_name,
-      (unsigned long)length);
-   if (png_ptr == NULL)
-      return;
-
    /* Write the length and the chunk name */
    png_save_uint_32(buf, length);
    png_memcpy(buf + 4, chunk_name, 4);
@@ -739,7 +740,7 @@ png_write_gAMA(png_structp png_ptr, double file_gamma)
 
    png_debug(1, "in png_write_gAMA");
 
-   /* file_gamma is saved in 1/100,000ths */
+   /* File_gamma is saved in 1/100,000ths */
    igamma = (png_uint_32)(file_gamma * 100000.0 + 0.5);
    png_save_uint_32(buf, igamma);
    png_write_chunk(png_ptr, (png_bytep)png_gAMA, buf, (png_size_t)4);
@@ -756,7 +757,7 @@ png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma)
 
    png_debug(1, "in png_write_gAMA");
 
-   /* file_gamma is saved in 1/100,000ths */
+   /* File_gamma is saved in 1/100,000ths */
    png_save_uint_32(buf, (png_uint_32)file_gamma);
    png_write_chunk(png_ptr, (png_bytep)png_gAMA, buf, (png_size_t)4);
 }