diff options
| author | Yuval Adam <yuv.adm@gmail.com> | 2014-08-08 14:42:07 +0300 |
|---|---|---|
| committer | Yuval Adam <yuv.adm@gmail.com> | 2014-08-08 14:42:07 +0300 |
| commit | a6163888f3c56123b1db313743c6147ba498732c (patch) | |
| tree | ff7d15d991d1d09ba6cbc0cec80924f57445bfdd /third_party/windows/fltk-1.1.10/src/Fl_PNG_Image.cxx | |
| parent | c3e4c9a25c2910d2d66d52215b3406b13d5b23d5 (diff) | |
Add third_party libs
Diffstat (limited to 'third_party/windows/fltk-1.1.10/src/Fl_PNG_Image.cxx')
| -rw-r--r-- | third_party/windows/fltk-1.1.10/src/Fl_PNG_Image.cxx | 155 |
1 files changed, 155 insertions, 0 deletions
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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