Sets the return type of Fl_Image_Surface::image() to its real value, Fl_RGB_Image.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10200 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

2 files changed, 6 insertions, 7 deletions

diff --git a/FL/Fl_Image_Surface.H b/FL/Fl_Image_Surface.H
index 7c2362b2d..39276117d 100644
--- a/FL/Fl_Image_Surface.H
+++ b/FL/Fl_Image_Surface.H
@@ -28,7 +28,7 @@
  After creation of an Fl_Image_Surface object, call set_current() on it, and all subsequent graphics requests
  will be recorded in the image. It's possible to draw widgets (using Fl_Image_Surface::draw()) 
  or to use any of the \ref fl_drawings or the \ref fl_attributes.
- Finally, call image() on the object to obtain a newly allocated Fl_Image object.
+ Finally, call image() on the object to obtain a newly allocated Fl_RGB_Image object.
  <br> Fl_GL_Window objects can be drawn in the image as well. 
  
  <br> Usage example:
@@ -38,7 +38,7 @@
  img_surf->set_current(); // direct graphics requests to the image
  fl_color(FL_WHITE); fl_rectf(0, 0, g->w(), g->h()); // draw a white background
  img_surf->draw(g); // draw the g widget in the image
- Fl_Image* image = img_surf->image(); // get the resulting image
+ Fl_RGB_Image* image = img_surf->image(); // get the resulting image
  delete img_surf; // delete the img_surf object
  Fl_Display_Device::display_device()->set_current();  // direct graphics requests back to the display
  \endcode
@@ -67,7 +67,7 @@ public:
   ~Fl_Image_Surface();
   void set_current();
   void draw(Fl_Widget*, int delta_x = 0, int delta_y = 0);
-  Fl_Image *image();
+  Fl_RGB_Image *image();
 };
 
 #ifdef __APPLE__
diff --git a/src/Fl_Image_Surface.cxx b/src/Fl_Image_Surface.cxx
index 1d5e6f5d8..b64004a61 100644
--- a/src/Fl_Image_Surface.cxx
+++ b/src/Fl_Image_Surface.cxx
@@ -64,11 +64,10 @@ Fl_Image_Surface::~Fl_Image_Surface() {
 #endif
 }
 
-/** Returns the image made of all drawings sent to the Fl_Image_Surface object.
- The returned object can be safely cast to Fl_RGB_Image* and contains its own copy
- of the RGB data.
+/** Returns an image made of all drawings sent to the Fl_Image_Surface object.
+ The returned object contains its own copy of the RGB data.
  */
-Fl_Image* Fl_Image_Surface::image()
+Fl_RGB_Image* Fl_Image_Surface::image()
 {
   unsigned char *data;
 #ifdef __APPLE__