The Fl_JPEG_Image class supports loading, caching, and drawing of Joint Photographic Experts Group (JPEG) File Interchange Format (JFIF) images. More...
#include <Fl_JPEG_Image.H>
Public Member Functions | |
| Fl_JPEG_Image (const char *filename) | |
| The constructor loads the JPEG image from the given jpeg filename. More... | |
| Fl_JPEG_Image (const char *name, const unsigned char *data) | |
| The constructor loads the JPEG image from memory. More... | |
 Public Member Functions inherited from Fl_RGB_Image | |
| virtual void | color_average (Fl_Color c, float i) |
| The color_average() method averages the colors in the image with the FLTK color value c. More... | |
| virtual Fl_Image * | copy (int W, int H) |
| The copy() method creates a copy of the specified image. More... | |
| Fl_Image * | copy () |
| virtual void | desaturate () |
| The desaturate() method converts an image to grayscale. More... | |
| virtual void | draw (int X, int Y, int W, int H, int cx=0, int cy=0) |
| Draws the image with a bounding box. More... | |
| void | draw (int X, int Y) |
| Fl_RGB_Image (const uchar *bits, int W, int H, int D=3, int LD=0) | |
| The constructor creates a new image from the specified data. More... | |
| Fl_RGB_Image (const Fl_Pixmap *pxm, Fl_Color bg=FL_GRAY) | |
| The constructor creates a new RGBA image from the specified Fl_Pixmap. More... | |
| virtual void | label (Fl_Widget *w) |
| The label() methods are an obsolete way to set the image attribute of a widget or menu item. More... | |
| virtual void | label (Fl_Menu_Item *m) |
| The label() methods are an obsolete way to set the image attribute of a widget or menu item. More... | |
| virtual void | uncache () |
| If the image has been cached for display, delete the cache data. More... | |
| virtual | ~Fl_RGB_Image () |
| The destructor frees all memory and server resources that are used by the image. More... | |
| Public Member Functions inherited from Fl_Image | |
| Fl_Image * | copy () |
| The copy() method creates a copy of the specified image. More... | |
| int | count () const |
| The count() method returns the number of data values associated with the image. More... | |
| int | d () const |
| Returns the current image depth. More... | |
| const char *const * | data () const |
| Returns a pointer to the current image data array. More... | |
| void | draw (int X, int Y) |
| Draws the image. More... | |
| Fl_Image (int W, int H, int D) | |
| The constructor creates an empty image with the specified width, height, and depth. More... | |
| int | h () const |
| Returns the current image height in pixels. | |
| void | inactive () |
| The inactive() method calls color_average(FL_BACKGROUND_COLOR, 0.33f) to produce an image that appears grayed out. More... | |
| int | ld () const |
| Returns the current line data size in bytes. More... | |
| int | w () const |
| Returns the current image width in pixels. | |
| virtual | ~Fl_Image () |
| The destructor is a virtual method that frees all memory used by the image. | |
Additional Inherited Members | |
| Static Public Member Functions inherited from Fl_RGB_Image | |
| static void | max_size (size_t size) |
| Sets the maximum allowed image size in bytes when creating an Fl_RGB_Image object. More... | |
| static size_t | max_size () |
| Returns the maximum allowed image size in bytes when creating an Fl_RGB_Image object. More... | |
| Static Public Member Functions inherited from Fl_Image | |
| static void | RGB_scaling (Fl_RGB_Scaling) |
| Sets the RGB image scaling method used for copy(int, int). More... | |
| static Fl_RGB_Scaling | RGB_scaling () |
| Returns the currently used RGB image scaling method. More... | |
| Public Attributes inherited from Fl_RGB_Image | |
| int | alloc_array |
| const uchar * | array |
| Protected Member Functions inherited from Fl_Image | |
| void | d (int D) |
| Sets the current image depth. | |
| void | data (const char *const *p, int c) |
| Sets the current array pointer and count of pointers in the array. | |
| void | draw_empty (int X, int Y) |
| The protected method draw_empty() draws a box with an X in it. More... | |
| void | h (int H) |
| Sets the current image height in pixels. | |
| void | ld (int LD) |
| Sets the current line data size in bytes. | |
| void | w (int W) |
| Sets the current image width in pixels. | |
| Static Protected Member Functions inherited from Fl_Image | |
| static void | labeltype (const Fl_Label *lo, int lx, int ly, int lw, int lh, Fl_Align la) |
| static void | measure (const Fl_Label *lo, int &lw, int &lh) |
Detailed Description
The Fl_JPEG_Image class supports loading, caching, and drawing of Joint Photographic Experts Group (JPEG) File Interchange Format (JFIF) images.
The class supports grayscale and color (RGB) JPEG image files.
Constructor & Destructor Documentation
| Fl_JPEG_Image::Fl_JPEG_Image | ( | const char * | filename | ) |
The constructor loads the JPEG image from the given jpeg filename.
The inherited destructor frees all memory and server resources that are used by the image.
There is no error function in this class. If the image has loaded correctly, w(), h(), and d() should return values greater zero.
- Parameters
-
[in] filename a full path and name pointing to a valid jpeg file.
| Fl_JPEG_Image::Fl_JPEG_Image | ( | const char * | name, |
| const unsigned char * | data | ||
| ) |
The constructor loads the JPEG image from memory.
Construct an image from a block of memory inside the application. Fluid offers "binary Data" chunks as a great way to add image data into the C++ source code. name_png can be NULL. If a name is given, the image is added to the list of shared images (see: Fl_Shared_Image) and will be available by that name.
The inherited destructor frees all memory and server resources that are used by the image.
There is no error function in this class. If the image has loaded correctly, w(), h(), and d() should return values greater zero.
- Parameters
-
name A unique name or NULL data A pointer to the memory location of the JPEG image
The documentation for this class was generated from the following files:
- Fl_JPEG_Image.H
- Fl_JPEG_Image.cxx
