*** empty log message ***

1 files changed, 57 insertions, 45 deletions

diff --git a/src/libpng/pngtrans.c b/src/libpng/pngtrans.c
index 1640095..f221f54 100644
--- a/src/libpng/pngtrans.c
+++ b/src/libpng/pngtrans.c
@@ -1,47 +1,50 @@
 
 /* pngtrans.c - transforms the data in a row (used by both readers and writers)
  *
- * Last changed in libpng 1.2.17 May 15, 2007
+ * Last changed in libpng 1.2.36 [May 14, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2007 Glenn Randers-Pehrson
+ * 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.)
  */
 
 #define PNG_INTERNAL
 #include "png.h"
-
 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+
 #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
-/* turn on BGR-to-RGB mapping */
+/* Turn on BGR-to-RGB mapping */
 void PNGAPI
 png_set_bgr(png_structp png_ptr)
 {
-   png_debug(1, "in png_set_bgr\n");
-   if(png_ptr == NULL) return;
+   png_debug(1, "in png_set_bgr");
+   if (png_ptr == NULL)
+      return;
    png_ptr->transformations |= PNG_BGR;
 }
 #endif
 
 #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
-/* turn on 16 bit byte swapping */
+/* Turn on 16 bit byte swapping */
 void PNGAPI
 png_set_swap(png_structp png_ptr)
 {
-   png_debug(1, "in png_set_swap\n");
-   if(png_ptr == NULL) return;
+   png_debug(1, "in png_set_swap");
+   if (png_ptr == NULL)
+      return;
    if (png_ptr->bit_depth == 16)
       png_ptr->transformations |= PNG_SWAP_BYTES;
 }
 #endif
 
 #if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
-/* turn on pixel packing */
+/* Turn on pixel packing */
 void PNGAPI
 png_set_packing(png_structp png_ptr)
 {
-   png_debug(1, "in png_set_packing\n");
-   if(png_ptr == NULL) return;
+   png_debug(1, "in png_set_packing");
+   if (png_ptr == NULL)
+      return;
    if (png_ptr->bit_depth < 8)
    {
       png_ptr->transformations |= PNG_PACK;
@@ -51,12 +54,13 @@ png_set_packing(png_structp png_ptr)
 #endif
 
 #if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED)
-/* turn on packed pixel swapping */
+/* Turn on packed pixel swapping */
 void PNGAPI
 png_set_packswap(png_structp png_ptr)
 {
-   png_debug(1, "in png_set_packswap\n");
-   if(png_ptr == NULL) return;
+   png_debug(1, "in png_set_packswap");
+   if (png_ptr == NULL)
+      return;
    if (png_ptr->bit_depth < 8)
       png_ptr->transformations |= PNG_PACKSWAP;
 }
@@ -66,8 +70,9 @@ png_set_packswap(png_structp png_ptr)
 void PNGAPI
 png_set_shift(png_structp png_ptr, png_color_8p true_bits)
 {
-   png_debug(1, "in png_set_shift\n");
-   if(png_ptr == NULL) return;
+   png_debug(1, "in png_set_shift");
+   if (png_ptr == NULL)
+      return;
    png_ptr->transformations |= PNG_SHIFT;
    png_ptr->shift = *true_bits;
 }
@@ -78,7 +83,7 @@ png_set_shift(png_structp png_ptr, png_color_8p true_bits)
 int PNGAPI
 png_set_interlace_handling(png_structp png_ptr)
 {
-   png_debug(1, "in png_set_interlace handling\n");
+   png_debug(1, "in png_set_interlace handling");
    if (png_ptr && png_ptr->interlaced)
    {
       png_ptr->transformations |= PNG_INTERLACE;
@@ -98,8 +103,9 @@ png_set_interlace_handling(png_structp png_ptr)
 void PNGAPI
 png_set_filler(png_structp png_ptr, png_uint_32 filler, int filler_loc)
 {
-   png_debug(1, "in png_set_filler\n");
-   if(png_ptr == NULL) return;
+   png_debug(1, "in png_set_filler");
+   if (png_ptr == NULL)
+      return;
    png_ptr->transformations |= PNG_FILLER;
    png_ptr->filler = (png_byte)filler;
    if (filler_loc == PNG_FILLER_AFTER)
@@ -131,8 +137,9 @@ png_set_filler(png_structp png_ptr, png_uint_32 filler, int filler_loc)
 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\n");
-   if(png_ptr == NULL) return;
+   png_debug(1, "in png_set_add_alpha");
+   if (png_ptr == NULL)
+      return;
    png_set_filler(png_ptr, filler, filler_loc);
    png_ptr->transformations |= PNG_ADD_ALPHA;
 }
@@ -145,8 +152,9 @@ png_set_add_alpha(png_structp png_ptr, png_uint_32 filler, int filler_loc)
 void PNGAPI
 png_set_swap_alpha(png_structp png_ptr)
 {
-   png_debug(1, "in png_set_swap_alpha\n");
-   if(png_ptr == NULL) return;
+   png_debug(1, "in png_set_swap_alpha");
+   if (png_ptr == NULL)
+      return;
    png_ptr->transformations |= PNG_SWAP_ALPHA;
 }
 #endif
@@ -156,8 +164,9 @@ png_set_swap_alpha(png_structp png_ptr)
 void PNGAPI
 png_set_invert_alpha(png_structp png_ptr)
 {
-   png_debug(1, "in png_set_invert_alpha\n");
-   if(png_ptr == NULL) return;
+   png_debug(1, "in png_set_invert_alpha");
+   if (png_ptr == NULL)
+      return;
    png_ptr->transformations |= PNG_INVERT_ALPHA;
 }
 #endif
@@ -166,16 +175,17 @@ png_set_invert_alpha(png_structp png_ptr)
 void PNGAPI
 png_set_invert_mono(png_structp png_ptr)
 {
-   png_debug(1, "in png_set_invert_mono\n");
-   if(png_ptr == NULL) return;
+   png_debug(1, "in png_set_invert_mono");
+   if (png_ptr == NULL)
+      return;
    png_ptr->transformations |= PNG_INVERT_MONO;
 }
 
-/* invert monochrome grayscale data */
+/* Invert monochrome grayscale data */
 void /* PRIVATE */
 png_do_invert(png_row_infop row_info, png_bytep row)
 {
-   png_debug(1, "in png_do_invert\n");
+   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 &&
    */
@@ -226,11 +236,11 @@ png_do_invert(png_row_infop row_info, png_bytep row)
 #endif
 
 #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
-/* swaps byte order on 16 bit depth images */
+/* Swaps byte order on 16 bit depth images */
 void /* PRIVATE */
 png_do_swap(png_row_infop row_info, png_bytep row)
 {
-   png_debug(1, "in png_do_swap\n");
+   png_debug(1, "in png_do_swap");
    if (
 #if defined(PNG_USELESS_TESTS_SUPPORTED)
        row != NULL && row_info != NULL &&
@@ -357,11 +367,11 @@ static PNG_CONST png_byte fourbppswaptable[256] = {
    0x8F, 0x9F, 0xAF, 0xBF, 0xCF, 0xDF, 0xEF, 0xFF
 };
 
-/* swaps pixel packing order within bytes */
+/* Swaps pixel packing order within bytes */
 void /* PRIVATE */
 png_do_packswap(png_row_infop row_info, png_bytep row)
 {
-   png_debug(1, "in png_do_packswap\n");
+   png_debug(1, "in png_do_packswap");
    if (
 #if defined(PNG_USELESS_TESTS_SUPPORTED)
        row != NULL && row_info != NULL &&
@@ -389,11 +399,11 @@ png_do_packswap(png_row_infop row_info, png_bytep row)
 
 #if defined(PNG_WRITE_FILLER_SUPPORTED) || \
     defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
-/* remove filler or alpha byte(s) */
+/* Remove filler or alpha byte(s) */
 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\n");
+   png_debug(1, "in png_do_strip_filler");
 #if defined(PNG_USELESS_TESTS_SUPPORTED)
    if (row != NULL && row_info != NULL)
 #endif
@@ -404,9 +414,9 @@ png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags)
       png_uint_32 i;
 
       if ((row_info->color_type == PNG_COLOR_TYPE_RGB ||
-         (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA &&
-         (flags & PNG_FLAG_STRIP_ALPHA))) &&
-         row_info->channels == 4)
+          (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA &&
+          (flags & PNG_FLAG_STRIP_ALPHA))) &&
+          row_info->channels == 4)
       {
          if (row_info->bit_depth == 8)
          {
@@ -547,11 +557,11 @@ png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags)
 #endif
 
 #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
-/* swaps red and blue bytes within a pixel */
+/* Swaps red and blue bytes within a pixel */
 void /* PRIVATE */
 png_do_bgr(png_row_infop row_info, png_bytep row)
 {
-   png_debug(1, "in png_do_bgr\n");
+   png_debug(1, "in png_do_bgr");
    if (
 #if defined(PNG_USELESS_TESTS_SUPPORTED)
        row != NULL && row_info != NULL &&
@@ -630,14 +640,15 @@ void PNGAPI
 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\n");
-   if(png_ptr == NULL) return;
+   png_debug(1, "in png_set_user_transform_info");
+   if (png_ptr == NULL)
+      return;
 #if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
    png_ptr->user_transform_ptr = user_transform_ptr;
    png_ptr->user_transform_depth = (png_byte)user_transform_depth;
    png_ptr->user_transform_channels = (png_byte)user_transform_channels;
 #else
-   if(user_transform_ptr || user_transform_depth || user_transform_channels)
+   if (user_transform_ptr || user_transform_depth || user_transform_channels)
       png_warning(png_ptr,
         "This version of libpng does not support user transform info");
 #endif
@@ -652,8 +663,9 @@ png_set_user_transform_info(png_structp png_ptr, png_voidp
 png_voidp PNGAPI
 png_get_user_transform_ptr(png_structp png_ptr)
 {
+   if (png_ptr == NULL)
+      return (NULL);
 #if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
-   if (png_ptr == NULL) return (NULL);
    return ((png_voidp)png_ptr->user_transform_ptr);
 #else
    return (NULL);