khtmlImLoad::ImageLoader
#include <imageloader.h>
Inherited by khtmlImLoad::GIFLoader, khtmlImLoad::JPEGLoader, khtmlImLoad::PNGLoader, and khtmlImLoad::QImageIOLoader.
Public Types | |
enum | { DefaultFrame = 0, FinalVersionID = 0xff } |
enum | Status { Done = -2, Error = -1 } |
Public Member Functions | |
virtual int | processData (uchar *data, int length)=0 |
virtual int | processEOF () |
void | setImage (Image *_image) |
Protected Member Functions | |
void | notifyAppendFrame (int fwidth, int fheight, const ImageFormat &format) |
void | notifyImageInfo (int width, int height) |
void | notifyQImage (unsigned char version, const QImage *qimage) |
void | notifyScanline (unsigned char version, unsigned char *line) |
void | notifySingleFrameImage (int width, int height, const ImageFormat &format) |
PixmapPlane * | requestFrame0 () |
void | requestScanline (unsigned int lineNum, unsigned char *lineBuf) |
Protected Attributes | |
Image * | image |
Detailed Description
A base class for decoders.
The decoders should inherit off this, and use the protected functions to feed their images data
Definition at line 40 of file imageloader.h.
Member Function Documentation
◆ notifyAppendFrame()
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inlineprotected |
Call to declare frame geometry, should be called for each frame.
Definition at line 61 of file imageloader.h.
◆ notifyImageInfo()
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inlineprotected |
Call to declare canvas geometry and format.
May only be called once
Definition at line 53 of file imageloader.h.
◆ notifyScanline()
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inlineprotected |
Call to provide a scanline, for active frame, and given "version".
The decoder must feed multiple versions of the image inside here, top-to-bottom, and incrementing versions. When it's done, it should either feed the last version with FinalVersionID, or call notifyFinished() separately.
Definition at line 81 of file imageloader.h.
◆ notifySingleFrameImage()
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inlineprotected |
wrapper for the above method for single-frame images
Definition at line 69 of file imageloader.h.
◆ processData()
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pure virtual |
Decodes a portion of the image, and returns the appropriate status, or the number of bytes read.
◆ processEOF()
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inlinevirtual |
This method is called to notify the decoder that the input is done, if the decoder has not already indicated some sort of completion on the stream; this is intended mostly for non-incremental decoders.
It should return Done if all is OK. Note that the "if" above should mean that the non-incremental decoders should just return the bytes read in processData
Definition at line 140 of file imageloader.h.
◆ requestFrame0()
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inlineprotected |
Call this to get the first frame.
Definition at line 102 of file imageloader.h.
◆ requestScanline()
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inlineprotected |
Call this to exract the current state of a scanline to the provided bufer.
Definition at line 94 of file imageloader.h.
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