Home » Developing U++ » U++ TheIDE and Library: Releases and ChangeLogs » Finally there... new Image "commited"...
| Finally there... new Image "commited"... [message #3235] |
Mon, 15 May 2006 14:47  |
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mirek
Messages: 13975
Registered: November 2005
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Recent tree is now freezed as "upp605" repository.
Short overview of new architecture:
Image has ALWAYS RGBA format. Alpha channel is now supported.
ImageBuffer - similar to StringBuffer, "writable" Image
Image - same as now, raster image that can be displayed by Draw
Raster - represents source of raster data, e.g. PNG file or PNG file in memory
ImageRaster - Raster of Image
StreamRaster - stream based raster, usually image file
RasterEncoder - "writer" of raster data - output stream of scanlines
ImageEncoder - RasterEncoder that produces Image
RasterStreamEncoder - base of file format encoders
Various image operations are available (sharpen/blur, color adjustments etc...), the often used basic form is "Raster->RasterEncoder".
MakeImage: Image operations can be registered by name, MakeImage creates image based on some input parameters (usually Image) and "cooking receipt", e.g.:
MakeImage(CtrlImg::exclamation, "rescale 100, 100; grayscale");
The thing is that MakeImage contains cache, so results can be cached (ideal for future chamemelon issues).
Another significant improvement of Draw:
void DrawData(int x, int y, int cx, int cy, const String& data, const char *type);
- this draws binary (or whatever) data with specified type. E.g.
w.DrawData(0, 0, 100, 100, LoadFile("d://file.png"), "image");
The most important part of this is that it works with Drawing (gets stored and rescaled as needed) and even has optimization support for printing (paints by bands, detects areas of uniform colors). In other words, it is a tool necessary to get AGG and other software renderers working.
To add your own DrawData format, you need to implement and register "DataDrawer" class.
Various other improvements were done too; e.g. Linux now supports images on clipboard and even RTF on clipboard.
Mirek
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| Re: Finally there... new Image "commited"... [message #3699 is a reply to message #3235] |
Tue, 13 June 2006 16:07  |
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fudadmin
Messages: 1321
Registered: November 2005
Location: Kaunas, Lithuania
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| luzr wrote on Mon, 15 May 2006 13:47 |
void DrawData(int x, int y, int cx, int cy, const String& data, const char *type);
The most important part of this is that it works with Drawing (gets stored and rescaled as needed) and even has optimization support for printing (paints by bands, detects areas of uniform colors). In other words, it is a tool necessary to get AGG and other software renderers working.
Mirek
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Not necassary for AGG but could help to save bandwidth... 
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