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Rapicorn::PixmapT< Pixbuf > Class Template Reference

Pixmap (PixmapT) is a Pixbuf wrapper template which provides various pixel operations. More...

#include <pixmap.hh>

List of all members.

Public Member Functions

 PixmapT ()
 Construct Pixmap with 0x0 pixesl.
 PixmapT (uint w, uint h)
 Construct Pixmap at given width and height.
 PixmapT (const Pixbuf &source)
 Copy-construct Pixmap from a Pixbuf structure.
 PixmapT (Blob &png_blob)
 Construct Pixmap from a PNG resource blob.
 PixmapT (const String &res_png)
 Construct Pixmap from a PNG resource blob.
PixmapToperator= (const Pixbuf &source)
 Re-initialize the Pixmap from a Pixbuf structure.
int width () const
 Get the width of the Pixmap.
int height () const
 Get the height of the Pixmap.
void resize (uint w, uint h)
 Reset width and height and resize pixel sequence.
bool try_resize (uint w, uint h)
 Resize unless width and height are too big.
const uint32row (uint y) const
 Access row read-only.
uint32row (uint y)
 Access row as endian dependant ARGB integers.
uint32pixel (uint x, uint y)
 Retrieve an ARGB pixel value reference.
uint32 pixel (uint x, uint y) const
 Retrieve an ARGB pixel value.
bool load_png (const String &filename, bool tryrepair=false)
 Load from PNG file, assigns errno on failure.
bool load_png (size_t nbytes, const char *bytes, bool tryrepair=false)
 Load PNG data, sets errno.
bool save_png (const String &filename)
 Save to PNG, assigns errno on failure.
bool load_pixstream (const uint8 *pixstream)
 Decode and load from pixel stream, assigns errno on failure.
void set_attribute (const String &name, const String &value)
 Set string attribute, e.g. "comment".
String get_attribute (const String &name) const
 Get string attribute, e.g. "comment".
void copy (const Pixbuf &source, uint sx, uint sy, int swidth, int sheight, uint tx, uint ty)
 Copy a Pixbuf area into this pximap.
bool compare (const Pixbuf &source, uint sx, uint sy, int swidth, int sheight, uint tx, uint ty, double *averrp=NULL, double *maxerrp=NULL, double *nerrp=NULL, double *npixp=NULL) const
 Compare area and calculate difference metrics.
 operator const Pixbuf & () const
 Allow automatic conversion of a Pixmap into a Pixbuf.

Detailed Description

template<class Pixbuf>
class Rapicorn::PixmapT< Pixbuf >

Pixmap (PixmapT) is a Pixbuf wrapper template which provides various pixel operations.

A Pixmap really is defined as PixmapT<Pixbuf>, a template class around Pixbuf which provides automatic memory management, pixel operations and IO functions. This class stores ARGB pixels of size width * height. The pixels are stored as unsigned 32-bit values in native endian format with premultiplied alpha (compatible with libcairo). The comment attribute is preserved during saving and loading by some file formats, such as PNG.


The documentation for this class was generated from the following files:
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