Add code for PNG and JPEG images.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@1713 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

1 files changed, 28 insertions, 40 deletions

diff --git a/src/Fl_PNG_Image.cxx b/src/Fl_PNG_Image.cxx
index 36ede18ff..e12cd5c77 100644
--- a/src/Fl_PNG_Image.cxx
+++ b/src/Fl_PNG_Image.cxx
@@ -1,5 +1,5 @@
 //
-// "$Id: Fl_PNG_Image.cxx,v 1.1.2.1 2001/11/19 01:06:45 easysw Exp $"
+// "$Id: Fl_PNG_Image.cxx,v 1.1.2.2 2001/11/23 12:06:36 easysw Exp $"
 //
 // Fl_PNG_Image routines.
 //
@@ -32,15 +32,9 @@
 //
 
 #include <FL/Fl_PNG_Image.H>
-#include "config.h"
+#include <config.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <ctype.h>
-#include <string.h>
-#ifdef HAVE_STRINGS_H
-#  include <strings.h>
-#endif /* HAVE_STRINGS_H */
-#include <errno.h>
 
 extern "C"
 {
@@ -51,23 +45,24 @@ extern "C"
 }
 
 
-#if 0
-#ifdef HAVE_LIBPNG
 //
-// 'Fl_Help_View::load_png()' - Load a PNG image file.
+// 'Fl_PNG_Image::Fl_PNG_Image()' - Load a PNG image file.
 //
 
-int					// O - 0 = success, -1 = fail
-Fl_Help_View::load_png(Fl_Help_Image *img,// I - Image pointer
-        	      FILE         *fp)	// I - File to read from
-{
+Fl_PNG_Image::Fl_PNG_Image(const char *png) // I - File to read
+  : Fl_RGB_Image(0,0,0) {
+#ifdef HAVE_LIBPNG
   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
-  png_color_16	bg;			// Background color
 
 
+  // 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);
@@ -82,12 +77,16 @@ Fl_Help_View::load_png(Fl_Help_Image *img,// I - Image pointer
     png_set_expand(pp);
 
   if (info->color_type & PNG_COLOR_MASK_COLOR)
-    img->d = 3;
+    channels = 3;
   else
-    img->d = 1;
+    channels = 1;
 
   if ((info->color_type & PNG_COLOR_MASK_ALPHA) || info->num_trans)
-    img->d ++;
+    channels ++;
+
+  w(info->width);
+  h(info->height);
+  d(channels);
 
   if (info->bit_depth < 8)
   {
@@ -103,31 +102,20 @@ Fl_Help_View::load_png(Fl_Help_Image *img,// I - Image pointer
     png_set_tRNS_to_alpha(pp);
 #endif // HAVE_PNG_GET_VALID && HAVE_SET_TRNS_TO_ALPHA
 
-  img->w    = (int)info->width;
-  img->h    = (int)info->height;
-  img->data = (unsigned char *)malloc(img->w * img->h * img->d);
-
-  // Background color...
-  unsigned	rgba = fltk_colors[bgcolor_];
-
-  bg.red   = 65535 * (rgba >> 24) / 255;
-  bg.green = 65535 * ((rgba >> 16) & 255) / 255;
-  bg.blue  = 65535 * ((rgba >> 8) & 255) / 255;
-
-  png_set_background(pp, &bg, PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0);
+  array = new uchar[w() * h() * d()];
 
   // Allocate pointers...
-  rows = (png_bytep *)calloc(info->height, sizeof(png_bytep));
+  rows = new png_bytep[h()];
 
-  for (i = 0; i < (int)info->height; i ++)
-    rows[i] = img->data + i * img->w * img->d;
+  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, img->h);
+    png_read_rows(pp, rows, NULL, h());
 
   // Free memory and return...
-  free(rows);
+  delete rows;
 
   png_read_end(pp, info);
 #  ifdef HAVE_PNG_READ_DESTROY
@@ -136,11 +124,11 @@ Fl_Help_View::load_png(Fl_Help_Image *img,// I - Image pointer
   png_destroy_read_struct(&pp, &info, NULL);
 #  endif // HAVE_PNG_READ_DESTROY
 
-  return (1);
-}
+  fclose(fp);
 #endif // HAVE_LIBPNG
-#endif // 0
+}
+
 
 //
-// End of "$Id: Fl_PNG_Image.cxx,v 1.1.2.1 2001/11/19 01:06:45 easysw Exp $".
+// End of "$Id: Fl_PNG_Image.cxx,v 1.1.2.2 2001/11/23 12:06:36 easysw Exp $".
 //