From a6163888f3c56123b1db313743c6147ba498732c Mon Sep 17 00:00:00 2001
From: Yuval Adam <yuv.adm@gmail.com>
Date: Fri, 8 Aug 2014 14:42:07 +0300
Subject: Add third_party libs

---
 .../windows/fltk-1.1.10/src/Fl_PNG_Image.cxx       | 155 +++++++++++++++++++++
 1 file changed, 155 insertions(+)
 create mode 100644 third_party/windows/fltk-1.1.10/src/Fl_PNG_Image.cxx

(limited to 'third_party/windows/fltk-1.1.10/src/Fl_PNG_Image.cxx')

diff --git a/third_party/windows/fltk-1.1.10/src/Fl_PNG_Image.cxx b/third_party/windows/fltk-1.1.10/src/Fl_PNG_Image.cxx
new file mode 100644
index 0000000..fa1deb4
--- /dev/null
+++ b/third_party/windows/fltk-1.1.10/src/Fl_PNG_Image.cxx
@@ -0,0 +1,155 @@
+//
+// "$Id: Fl_PNG_Image.cxx 5190 2006-06-09 16:16:34Z mike $"
+//
+// Fl_PNG_Image routines.
+//
+// Copyright 1997-2005 by Easy Software Products.
+// Image support donated by Matthias Melcher, Copyright 2000.
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+// USA.
+//
+// Please report all bugs and problems on the following page:
+//
+//     http://www.fltk.org/str.php
+//
+// Contents:
+//
+//   Fl_PNG_Image::Fl_PNG_Image() - Load a PNG image file.
+//
+
+//
+// Include necessary header files...
+//
+
+#include <FL/Fl.H>
+#include <FL/Fl_PNG_Image.H>
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+extern "C"
+{
+#if defined(HAVE_LIBPNG) && defined(HAVE_LIBZ)
+#  include <zlib.h>
+#  ifdef HAVE_PNG_H
+#    include <png.h>
+#  else
+#    include <libpng/png.h>
+#  endif // HAVE_PNG_H
+#endif // HAVE_LIBPNG && HAVE_LIBZ
+}
+
+
+//
+// 'Fl_PNG_Image::Fl_PNG_Image()' - Load a PNG image file.
+//
+
+Fl_PNG_Image::Fl_PNG_Image(const char *png) // I - File to read
+  : Fl_RGB_Image(0,0,0) {
+#if defined(HAVE_LIBPNG) && defined(HAVE_LIBZ)
+  int		i;			// Looping var
+  FILE		*fp;			// File pointer
+  int		channels;		// Number of color channels
+  png_structp	pp;			// PNG read pointer
+  png_infop	info;			// PNG info pointers
+  png_bytep	*rows;			// PNG row pointers
+
+
+  // Open the PNG file...
+  if ((fp = fopen(png, "rb")) == NULL) return;
+
+  // Setup the PNG data structures...
+  pp   = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+  info = png_create_info_struct(pp);
+
+  if (setjmp(pp->jmpbuf))
+  {
+    Fl::warning("PNG file \"%s\" contains errors!\n", png);
+    return;
+  }
+
+  // Initialize the PNG read "engine"...
+  png_init_io(pp, fp);
+
+  // Get the image dimensions and convert to grayscale or RGB...
+  png_read_info(pp, info);
+
+  if (info->color_type == PNG_COLOR_TYPE_PALETTE)
+    png_set_expand(pp);
+
+  if (info->color_type & PNG_COLOR_MASK_COLOR)
+    channels = 3;
+  else
+    channels = 1;
+
+  if ((info->color_type & PNG_COLOR_MASK_ALPHA) || info->num_trans)
+    channels ++;
+
+  w((int)(info->width));
+  h((int)(info->height));
+  d(channels);
+
+  if (info->bit_depth < 8)
+  {
+    png_set_packing(pp);
+    png_set_expand(pp);
+  }
+  else if (info->bit_depth == 16)
+    png_set_strip_16(pp);
+
+#  if defined(HAVE_PNG_GET_VALID) && defined(HAVE_PNG_SET_TRNS_TO_ALPHA)
+  // Handle transparency...
+  if (png_get_valid(pp, info, PNG_INFO_tRNS))
+    png_set_tRNS_to_alpha(pp);
+#  endif // HAVE_PNG_GET_VALID && HAVE_PNG_SET_TRNS_TO_ALPHA
+
+  array = new uchar[w() * h() * d()];
+  alloc_array = 1;
+
+  // Allocate pointers...
+  rows = new png_bytep[h()];
+
+  for (i = 0; i < h(); i ++)
+    rows[i] = (png_bytep)(array + i * w() * d());
+
+  // Read the image, handling interlacing as needed...
+  for (i = png_set_interlace_handling(pp); i > 0; i --)
+    png_read_rows(pp, rows, NULL, h());
+
+#ifdef WIN32
+  // Some Windows graphics drivers don't honor transparency when RGB == white
+  if (channels == 4) {
+    // Convert RGB to 0 when alpha == 0...
+    uchar *ptr = (uchar *)array;
+    for (i = w() * h(); i > 0; i --, ptr += 4)
+      if (!ptr[3]) ptr[0] = ptr[1] = ptr[2] = 0;
+  }
+#endif // WIN32
+
+  // Free memory and return...
+  delete[] rows;
+
+  png_read_end(pp, info);
+  png_destroy_read_struct(&pp, &info, NULL);
+
+  fclose(fp);
+#endif // HAVE_LIBPNG && HAVE_LIBZ
+}
+
+
+//
+// End of "$Id: Fl_PNG_Image.cxx 5190 2006-06-09 16:16:34Z mike $".
+//
-- 
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