Image cache for the viewer. More...
Classes | |
| struct | LineEnds |
Public Types | |
| enum | StartType { START_PAUSED, START_NEVER, START_PLAYBACK, START_IF_NO_IMAGE, START_CONTEXT } |
Public Member Functions | |
| void | preload (DD::Image::Hash viewer_hash) |
| virtual void | read_from_cache (DD::Image::Hash viewer_hash, StartType what) |
| virtual void | write_to_cache (DD::Image::Hash hash) |
| void | deallocateAll () |
| bool | lineDone (int y) const |
| const DD::Image::Box & | get_roi () const |
Static Public Member Functions | |
| static DD::Image::Hash | MakeFileHash (DD::Image::Hash hash, int scale, DD::Image::ChannelSet channels) |
| static void | InitCache () |
| static bool | BoxPresent (const DD::Image::Hash &hash, const DD::Image::Box &box, int downrez_y) |
Protected Member Functions | |
| void | allocateLine (int y) |
| void | deallocateLine (int y) |
| virtual double | pixelAspect () const =0 |
| virtual DD::Image::Box | bbox () const =0 |
| virtual void | updateBBox (DD::Image::Box newBBox) |
| virtual void | readFromCacheDone (bool failed, bool allDone, bool skippedStuff) |
| virtual void | updateFrameRange (int first, int last) |
| void | setFrameRange (int first, int last) |
Protected Attributes | |
| AccountedVector< U32 * > | lineBuffers |
| Array of line pointers. | |
| AccountedVector< LineEnds > | lineEnds |
| Array of left/right ends. | |
| int | alloc_w |
| int | alloc_h |
| Size of image buffer. | |
| int | width |
| int | height |
| Size we are using. | |
| bool | one_block |
| Indicates a single allocation of line data. | |
| DD::Image::Box | roi |
| BBox of area to calculate. | |
| int | viewer_downrez_y |
| Viewer downrez factor (integer of 1/yzoom) | |
| int | processing_downrez_y |
| Processing downrez factor. Either the same as viewer_downrez_y or 1, if we're in full frame mode (processing all scanlines regardless of zoom level) | |
| bool | userRoiEnable |
| True if user enabled roi. | |
| DD::Image::Box | userRoi |
| Roi selected by user. | |
| bool | image_done_ |
| All visible lines are up to date. | |
| bool | look_in_cache |
| False if we know there is nothing useful in cache file. | |
| int | scale_ |
| Size of each channel of a pixel in image buffer. | |
Static Protected Attributes | |
| static int | sAllocFudge |
Image cache for the viewer.
| void ViewerCache::preload | ( | DD::Image::Hash | viewer_hash | ) |
Read into the memory cache (but don't try and actually load lines out of this file)
References DD::Image::Image_Cache::mainCache().
| void ViewerCache::read_from_cache | ( | DD::Image::Hash | viewer_hash, |
| StartType | what | ||
| ) | [virtual] |
Update the viewer from the cache file. Turn on image_done_ if all the visible data has been updated.
References DD::Image::ImageCacheReadI::close(), height, image_done_, lineBuffers, lineEnds, look_in_cache, DD::Image::Image_Cache::mainCache(), one_block, DD::Image::Image_Cache::open(), processing_downrez_y, DD::Image::Box::r(), DD::Image::ImageCacheReadI::read(), DD::Image::Image_Cache::remove(), roi, scale_, DD::Image::ImageCacheReadI::seekRelative(), DD::Image::Box::t(), userRoi, userRoiEnable, DD::Image::Box::x(), and DD::Image::Box::y().
| bool ViewerCache::BoxPresent | ( | const DD::Image::Hash & | hash, |
| const DD::Image::Box & | box, | ||
| int | downrez_y | ||
| ) | [static] |
Is the given box present in the memory cache for the viewer cache file identified by /hash/
Only lines required for the passed-in downrez will be considered.
References DD::Image::Box::clear(), DD::Image::ImageCacheReadI::close(), DD::Image::Image_Cache::mainCache(), DD::Image::Image_Cache::open(), and DD::Image::ImageCacheReadI::uniqueID().