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* Add BIconUtils documentation to the Haiku Book 

* Remove comments from the header itself.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42606 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Adrien Destugues 2011-08-09 19:31:46 +00:00
parent 5ff6f0d491
commit ca2c99c2ca
2 changed files with 127 additions and 27 deletions
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127
docs/user/interface/IconUtils.dox Normal file
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@ -0,0 +1,127 @@
/*
* Copyright 2011, Haiku, Inc. All Rights Reserved.
* Distributed under the terms of the MIT License.
*
* Documentation by:
* Adrien Destugues <pulkomandy@pulkomandy.ath.cx>
* Corresponds to:
* /trunk/headers/os/interface/IconUtils.h rev 42600
* /trunk/src/kits/interface/IconUtils.cpp rev 42600
*/
/*!
\file IconUtils.h
\brief Vector icon handling utility class
*/
/*! \class BIconUtils
\ingroup interface
\ingroup libbe
\brief The BIconUtils class provide utility methods for managing and
drawing vector icons.
Haiku icons are stored in the HVIF (Haiku Vector Icon Format). This format
was designed specifically for this purpose, and allows the icon data to be
small enough to fit in file's inodes. This way, the icon can be displayed
like any other file attribute, without extra disk access.
This class provide only static methods to allow access to the icon data and
rendering to BBitmaps for later use in an application. It also supports
older icons in bitmap format. These may still be useful at very small
sizes. Note you can't create an instance of BIconUtils, just call the
static methods.
*/
/*! \fn static status_t BIconUtils::GetIcon(BNode* node,
const char* vectorIconAttrName, const char* smallIconAttrName,
const char* largeIconAttrName, icon_size size, BBitmap* result)
\brief Utility function to import an icon from a node.
Utility function to import an icon from the node that
has either of the provided attribute names. Which icon type
is preferred (vector, small or large B_CMAP8 icon) depends
on the colorspace of the provided bitmap.
\note If the colorspace is B_CMAP8, B_CMAP8 icons are preferred. In that
case, the bitmap size must also match the provided icon_size "size"!
*/
/*! \fn static status_t BIconUtils::GetVectorIcon(BNode* node,
const char* attrName, BBitmap* result)
\brief Utility function to import a vector icon in "flat icon" format.
Utility function to import a vector icon in "flat icon"
format from a BNode attribute into the preallocated BBitmap \a result.
The colorspace of result needs to be B_RGBA32 or at
least B_RGB32 (though that makes less sense). The icon
will be scaled from it's "native" size of 64x64 to the
size of the bitmap.
\note The scale is derived from the bitmap width, the bitmap should have
square dimension, or the icon will be cut off at the bottom (or have
room left).
*/
/*! \fn static status_t BIconUtils::GetVectorIcon(const uint8* buffer,
const char* attrName, BBitmap* result)
\brief Utility function to import a vector icon in "flat icon" format.
Utility function to import a vector icon in "flat icon"
format from the given \a buffer into the preallocated BBitmap \a result.
The colorspace of result needs to be B_RGBA32 or at
least B_RGB32 (though that makes less sense). The icon
will be scaled from it's "native" size of 64x64 to the
size of the bitmap.
\note The scale is derived from the bitmap width, the bitmap should have
square dimension, or the icon will be cut off at the bottom (or have
room left).
*/
/*! \fn static status_t BIconUtils::GetCMAP8Icon(BNode* node,
const char* smallIconAttrName, const char* largeIconAttrName,
icon_size size, BBitmap* icon)
\brief Utility function to import an "old" BeOS icon in B_CMAP8 colorspace.
Utility function to import an "old" BeOS icon in B_CMAP8 colorspace from
either the small icon attribute or the large icon attribute as given in
\a smallIconAttrName and \a largeIconAttrName. Which icon is loaded depends
on the given \a size.
*/
/*! \fn static status_t BIconUtils::ConvertFromCMAP8(BBitmap* source, BBitmap* result)
\brief Converts an old-style icon to another colorspace.
Utility function to convert from old icon colorspace into colorspace of
BBitmap \a result
\note result should be in B_RGBA32 colorspace, and source in B_CMAP8.
*/
/*! \fn static status_t BIconUtils::ConvertToCMAP8(BBitmap* source, BBitmap* result)
\brief Converts a true-color icon to CMAP8 colorspace.
Utility function to convert data from source into \a result colorspace.
Call this to convert a picture to a format suitable for storage as an
old-style icon.
\note result should be in B_CMAP8 colorspace, and source in B_RGBA32.
*/
/*! \fn static status_t BIconUtil::ConvertFromCMAP8(const uint8* data, uint32 width,
uint32 height, uint32 bytesPerRow, BBitmap* result);
\brief Convert raw data in B_CMAP8 colorspace to a B_RGBA32 BBitmap.
*/
/*! \fn static status_t BIconUtils::ConvertToCMAP8(const uint8* data, uint32 width,
uint32 height, uint32 bytesPerRow, BBitmap* result);
\brief Convert B_RGBA32 raw data into a B_CMAP8 BBitmap.
*/

27
headers/os/interface/IconUtils.h
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@ -12,9 +12,6 @@ class BBitmap;
class BNode;
// This class is a little different from many other classes.
// You don't create an instance of it; you just call its various
// static member functions for utility-like operations.
class BIconUtils {
BIconUtils();
~BIconUtils();
@ -22,47 +19,23 @@ class BIconUtils {
BIconUtils& operator=(const BIconUtils&);
public:
// Utility function to import an icon from the node that
// has either of the provided attribute names. Which icon type
// is preferred (vector, small or large B_CMAP8 icon) depends
// on the colorspace of the provided bitmap. If the colorspace
// is B_CMAP8, B_CMAP8 icons are preferred. In that case, the
// bitmap size must also match the provided icon_size "size"!
static status_t GetIcon(BNode* node,
const char* vectorIconAttrName,
const char* smallIconAttrName,
const char* largeIconAttrName,
icon_size size, BBitmap* result);
// Utility functions to import a vector icon in "flat icon"
// format from a BNode attribute or from a flat buffer in
// memory into the preallocated BBitmap "result".
// The colorspace of result needs to be B_RGBA32 or at
// least B_RGB32 (though that makes less sense). The icon
// will be scaled from it's "native" size of 64x64 to the
// size of the bitmap, the scale is derived from the bitmap
// width, the bitmap should have square dimension, or the
// icon will be cut off at the bottom (or have room left).
static status_t GetVectorIcon(BNode* node,
const char* attrName, BBitmap* result);
static status_t GetVectorIcon(const uint8* buffer,
size_t size, BBitmap* result);
// Utility function to import an "old" BeOS icon in B_CMAP8
// colorspace from either the small icon attribute or the
// large icon attribute as given in "smallIconAttrName" and
// "largeIconAttrName". Which icon is loaded depends on
// the given "size".
static status_t GetCMAP8Icon(BNode* node,
const char* smallIconAttrName,
const char* largeIconAttrName,
icon_size size, BBitmap* icon);
// Utility functions to convert from old icon colorspace
// into colorspace of BBitmap "result" (should be B_RGBA32
// to make any sense).
static status_t ConvertFromCMAP8(BBitmap* source,
BBitmap* result);
static status_t ConvertToCMAP8(BBitmap* source,