2001-11-27 07:55:48 +03:00
|
|
|
<HTML>
|
|
|
|
|
<BODY>
|
|
|
|
|
|
|
|
|
|
<!-- NEW PAGE -->
|
|
|
|
|
|
|
|
|
|
<H2><A name="Fl_Image">class Fl_Image</A></H2>
|
|
|
|
|
|
2001-11-27 05:09:45 +03:00
|
|
|
<HR>
|
2001-11-27 07:55:48 +03:00
|
|
|
|
2001-11-27 05:09:45 +03:00
|
|
|
<H3>Class Hierarchy</H3>
|
2001-11-27 07:55:48 +03:00
|
|
|
|
|
|
|
|
<UL><PRE>
|
|
|
|
|
<B>Fl_Image</B>
|
|
|
|
|
|
|
|
|
|
|
+----<A href="Fl_Bitmap.html">Fl_Bitmap</A>,
|
|
|
|
|
<A href="Fl_Pixmap.html">Fl_Pixmap</A>,
|
|
|
|
|
<A href="Fl_RGB_Image.html">Fl_RGB_Image</A>,
|
|
|
|
|
<A href="Fl_Shared_Image.html">Fl_Shared_Image</A>,
|
|
|
|
|
<A href="Fl_Tiled_Image.html">Fl_Tiled_Image</A>
|
|
|
|
|
</PRE></UL>
|
|
|
|
|
|
2001-11-27 05:09:45 +03:00
|
|
|
<H3>Include Files</H3>
|
2001-11-27 07:55:48 +03:00
|
|
|
|
|
|
|
|
<UL><PRE>
|
|
|
|
|
#include <FL/Fl_Image.H>
|
|
|
|
|
</PRE></UL>
|
|
|
|
|
|
2001-11-27 05:09:45 +03:00
|
|
|
<H3>Description</H3>
|
2001-08-02 01:24:49 +04:00
|
|
|
|
2001-11-27 07:55:48 +03:00
|
|
|
<P><TT>Fl_Image</TT> is the base class used for caching and
|
|
|
|
|
drawing all kinds of images in FLTK. This class keeps track of
|
|
|
|
|
common image data such as the pixels, colormap, width, height,
|
|
|
|
|
and depth. Virtual methods are used to provide type-specific
|
|
|
|
|
image handling.</P>
|
|
|
|
|
|
|
|
|
|
<P>Since the <TT>Fl_Image</TT> class does not support image
|
|
|
|
|
drawing by itself, calling the <TT>draw()</TT> method results in
|
|
|
|
|
a box with an X in it being drawn instead.</P>
|
2001-08-02 01:24:49 +04:00
|
|
|
|
2001-11-27 05:09:45 +03:00
|
|
|
<H3>Methods</H3>
|
2001-11-27 07:55:48 +03:00
|
|
|
|
2001-11-27 05:09:45 +03:00
|
|
|
<UL>
|
2001-11-27 07:55:48 +03:00
|
|
|
|
|
|
|
|
<LI><A href="#Fl_Image.Fl_Image">Fl_Image</A></LI>
|
|
|
|
|
|
|
|
|
|
<LI><A href="#Fl_Image.~Fl_Image">~Fl_Image</A></LI>
|
|
|
|
|
|
|
|
|
|
<LI><A href="#Fl_Image.color_average">color_average</A></LI>
|
|
|
|
|
|
|
|
|
|
<LI><A href="#Fl_Image.copy">copy</A></LI>
|
|
|
|
|
|
|
|
|
|
<LI><A href="#Fl_Image.count">count</A></LI>
|
|
|
|
|
|
|
|
|
|
<LI><A href="#Fl_Image.d">d</A></LI>
|
|
|
|
|
|
|
|
|
|
<LI><A href="#Fl_Image.data">data</A></LI>
|
|
|
|
|
|
|
|
|
|
<LI><A href="#Fl_Image.desaturate">desaturate</A></LI>
|
|
|
|
|
|
|
|
|
|
<LI><A href="#Fl_Image.draw">draw</A></LI>
|
|
|
|
|
|
|
|
|
|
<LI><A href="#Fl_Image.draw_empty">draw_empty</A></LI>
|
|
|
|
|
|
|
|
|
|
<LI><A href="#Fl_Image.h">h</A></LI>
|
|
|
|
|
|
|
|
|
|
<LI><A href="#Fl_Image.inactive">inactive</A></LI>
|
|
|
|
|
|
|
|
|
|
<LI><A href="#Fl_Image.label">label</A></LI>
|
|
|
|
|
|
|
|
|
|
<LI><A href="#Fl_Image.ld">ld</A></LI>
|
|
|
|
|
|
2002-08-05 21:50:25 +04:00
|
|
|
<LI><A href="#Fl_Image.uncache">uncache</A></LI>
|
|
|
|
|
|
2001-11-27 07:55:48 +03:00
|
|
|
<LI><A href="#Fl_Image.w">w</A></LI>
|
|
|
|
|
|
2001-08-02 01:24:49 +04:00
|
|
|
</UL>
|
2001-11-27 07:55:48 +03:00
|
|
|
|
|
|
|
|
<H4><A NAME="Fl_Image.Fl_Image">Fl_Image(int W, int H, int D);</A></H4>
|
|
|
|
|
|
|
|
|
|
<P>The constructor creates an empty image with the specified
|
|
|
|
|
width, height, and depth. The width and height are in pixels.
|
|
|
|
|
The depth is 0 for bitmaps, 1 for pixmap (colormap) images, and
|
|
|
|
|
1 to 4 for color images.</P>
|
|
|
|
|
|
|
|
|
|
<H4><A NAME="Fl_Image.~Fl_Image">virtual ~Fl_Image();</A></H4>
|
|
|
|
|
|
|
|
|
|
<P>The destructor is a virtual method that frees all memory used
|
|
|
|
|
by the image.</P>
|
|
|
|
|
|
|
|
|
|
<H4><A NAME="Fl_Image.color_average">virtual void color_average(Fl_Color c, float i);</A></H4>
|
|
|
|
|
|
|
|
|
|
<P>The <TT>color_average()</TT> method averages the colors in
|
|
|
|
|
the image with the FLTK color value <TT>c</TT>. The <TT>i</TT>
|
|
|
|
|
argument specifies the amount of the original image to combine
|
|
|
|
|
with the color, so a value of 1.0 results in no color blend, and
|
|
|
|
|
a value of 0.0 results in a constant image of the specified
|
|
|
|
|
color. <I>The original image data is not altered by this
|
|
|
|
|
method.</I></P>
|
|
|
|
|
|
|
|
|
|
<H4><A NAME="Fl_Image.copy">virtual Fl_Image *copy(int W, int H);<BR>
|
|
|
|
|
copy();</A></H4>
|
|
|
|
|
|
|
|
|
|
<P>The <TT>copy()</TT> method creates a copy of the specified
|
|
|
|
|
image. If the width and height are provided, the image is
|
|
|
|
|
resized to the specified size.</P>
|
|
|
|
|
|
|
|
|
|
<H4><A NAME="Fl_Image.count">int count();</A></H4>
|
|
|
|
|
|
|
|
|
|
<P>The <TT>count()</TT> method returns the number of data values
|
|
|
|
|
associated with the image. The value will be 0 for images with
|
|
|
|
|
no associated data, 1 for bitmap and color images, and greater
|
|
|
|
|
than 2 for pixmap images.</P>
|
|
|
|
|
|
|
|
|
|
<H4><A NAME="Fl_Image.d">int d();<BR>
|
|
|
|
|
protected void d(int D);</A></H4>
|
|
|
|
|
|
|
|
|
|
<P>The first form of the <TT>d()</TT> method returns the current
|
|
|
|
|
image depth. The return value will be 0 for bitmaps, 1 for
|
|
|
|
|
pixmaps, and 1 to 4 for color images.</P>
|
|
|
|
|
|
|
|
|
|
<P>The second form is a protected method that sets the current
|
|
|
|
|
image depth.</P>
|
|
|
|
|
|
|
|
|
|
<H4><A NAME="Fl_Image.data">const char * const *data();<BR>
|
|
|
|
|
protected void data(const char * const *data, int count);</A></H4>
|
|
|
|
|
|
|
|
|
|
<P>The first form of the <TT>data()</TT> method returns a
|
|
|
|
|
pointer to the current image data array. Use the
|
|
|
|
|
<TT>count()</TT> method to find the size of the data array.</P>
|
|
|
|
|
|
|
|
|
|
<P>The second form is a protected method that sets the current
|
|
|
|
|
array pointer and count of pointers in the array.</P>
|
|
|
|
|
|
|
|
|
|
<H4><A NAME="Fl_Image.desaturate">virtual void desaturate()</A></H4>
|
|
|
|
|
|
|
|
|
|
<P>The <TT>desaturate()</TT> method converts an image to
|
|
|
|
|
grayscale. If the image contains an alpha channel (depth = 4),
|
|
|
|
|
the alpha channel is preserved. <I>This method does not alter
|
|
|
|
|
the original image data.</I></P>
|
|
|
|
|
|
|
|
|
|
<H4><A NAME="Fl_Image.draw">void draw(int X, int Y);<BR>
|
|
|
|
|
virtual void draw(int X, int Y, int W, int H, int cx, int cy);</A></H4>
|
|
|
|
|
|
|
|
|
|
<P>The <TT>draw()</TT> methods draw the image. The first form
|
|
|
|
|
specifies the upper-lefthand corner of the image. The second
|
|
|
|
|
form specifies a bounding box for the image, with the origin
|
|
|
|
|
(upper-lefthand corner) of the image offset by the <TT>cx</TT>
|
|
|
|
|
and <TT>cy</TT> arguments.</P>
|
|
|
|
|
|
|
|
|
|
<H4><A NAME="Fl_Image.draw_empty">protected void draw_empty(int X, int Y);</A></H4>
|
|
|
|
|
|
|
|
|
|
<P>The protected method <TT>draw_empty()</TT> draws a box with
|
|
|
|
|
an X in it. It can be used to draw any image that lacks image
|
|
|
|
|
data.</P>
|
|
|
|
|
|
|
|
|
|
<H4><A NAME="Fl_Image.h">int h();<BR>
|
|
|
|
|
protected void h(int H);</A></H4>
|
|
|
|
|
|
|
|
|
|
<P>The first form of the <TT>h()</TT> method returns the current
|
|
|
|
|
image height in pixels.</P>
|
|
|
|
|
|
|
|
|
|
<P>The second form is a protected method that sets the current
|
|
|
|
|
image height.</P>
|
|
|
|
|
|
|
|
|
|
<H4><A NAME="Fl_Image.inactive">void inactive();</A></H4>
|
|
|
|
|
|
|
|
|
|
<P>The <TT>inactive()</TT> method calls
|
2005-12-19 16:33:08 +03:00
|
|
|
<TT>color_average(FL_BACKGROUND_COLOR, 0.33f)</TT> to produce
|
|
|
|
|
an image that appears grayed out. <I>This method does not
|
|
|
|
|
alter the original image data.</I></P>
|
2001-11-27 07:55:48 +03:00
|
|
|
|
|
|
|
|
<H4><A NAME="Fl_Image.label">virtual void label(Fl_Widget *w);
|
|
|
|
|
virtual void label(Fl_Menu_Item *m);</A></H4>
|
|
|
|
|
|
|
|
|
|
<P>The <TT>label()</TT> methods are an obsolete way to set the
|
|
|
|
|
image attribute of a widget or menu item. Use the
|
|
|
|
|
<TT>image()</TT> or <TT>deimage()</TT> methods of the
|
|
|
|
|
<TT>Fl_Widget</TT> and <TT>Fl_Menu_Item</TT> classes
|
|
|
|
|
instead.</P>
|
|
|
|
|
|
|
|
|
|
<H4><A NAME="Fl_Image.ld">int ld();<BR>
|
|
|
|
|
protected void ld(int LD);</A></H4>
|
|
|
|
|
|
|
|
|
|
<P>The first form of the <TT>ld()</TT> method returns the current
|
|
|
|
|
line data size in bytes. Line data is extra data that is included
|
|
|
|
|
after each line of color image data and is normally not present.</P>
|
|
|
|
|
|
|
|
|
|
<P>The second form is a protected method that sets the current
|
|
|
|
|
line data size in bytes.</P>
|
|
|
|
|
|
2002-08-05 21:50:25 +04:00
|
|
|
<H4><A NAME="Fl_Image.uncache">void uncache();</A></H4>
|
|
|
|
|
|
|
|
|
|
<P>If the image has been cached for display, delete the cache
|
|
|
|
|
data. This allows you to change the data used for the image and
|
|
|
|
|
then redraw it without recreating an image object.
|
|
|
|
|
|
2001-11-27 07:55:48 +03:00
|
|
|
<H4><A NAME="Fl_Image.w">int w();<BR>
|
|
|
|
|
protected void w(int W);</A></H4>
|
|
|
|
|
|
|
|
|
|
<P>The first form of the <TT>w()</TT> method returns the current
|
|
|
|
|
image width in pixels.</P>
|
|
|
|
|
|
|
|
|
|
<P>The second form is a protected method that sets the current
|
|
|
|
|
image width.</P>
|
|
|
|
|
|
|
|
|
|
</BODY>
|
|
|
|
|
</HTML>
|
