OverviewThis site is now available in German and English. This section is a quick overview of the features of DA's Picture and how to use them.
WindowsMost of the windows shown here do not open automatically. Use the iconbar menu 'Panels' to open (and to close) them.
These are the tools to process the pictures. They can be split into three groups: The painting tools like the pencil and spray can, special effects like sharping and smearing and, finally, tools to move the picture or to obtain information from it.
In the bottom part of the toolbox you can see the currently selected tool. A feature of DA's Picture is that you can use different tools, colours and pencil shapes with the left and right mouse button. If you feel that isn't very RISC OS-like, you could always set the right button to the Restore function to use as a 'rubber' to erase unwanted modifications to the painting.
The dotted line under the currently-selected tool shows the drawing mode. The best way to understand this is to test each with the pencil tool. Draw a line quickly and you will see the difference. There is a third mode where you can define a line in the document. Painting will then be performed along this path.
ColoursDA's Picture was released at the time the Risc PC came out, and it does, of course, support 24 Bit colours. DA's picture has its own colour selection window and does not use the standard RISC OS colour picker - as you can see on the pictures. Each bar has its own colour, but when you move one slider the colour of all the bars will change. Even if this is not the professional way to do it, you will see that it is interesting to play around with. Not only RGB is supported but CMYK and HSB too, available from a submenu. To select a colour you have to click the left or right mouse button over the coloured square.
Standard FiltersThere are only a few built-in filters for things like sharpening and blurring. Unfortunately it isn't possible to preview the effect of the filter before using it, so you have to try it and, if the result doesn't fit your expectations, you have to undo it. This may take a long time for bigger pictures.
In the menu there is a separate part where you can add additional filters.
This is another weakness of the program, because you can only load one filter at a time and you have to drag & drop it from a filer window.
Normally I like drag & drop as it is a RISC OS standard, but here a submenu with access to a filter directory inside !Picture would have been much nicer.
There are some interesting extra filters which can be found in an additional directory. On Atari websites they speak of several hundred filters which would be compatible with the RISC OS version.
Unfortunately it is hard to find them, so if you have some more filters and would like to make them public, please contact me. In future there will be a new page on the site where all available filters will be described.
Brightness and Contrast
With the Gradation window you can change the brightness and contrast for the whole picture or only for one colour. You can see the difference directly in the picture so that you can play with it. If you would like to make any changes permanent, you have to press the Apply button. You can alter the graphical display with the mouse. To reset it, just press the Linear button on the left site.
It is possible to have colour blends. The normal 'Monotone' mode is the default one. You can change it to a linear or one of two 'sizes' of radial modes as shown in the picture.
It is possible to add some noise to the blend; this is shown in the picture too. In the linear mode you can set the angles initially to 0, 90, 180 and 270 degrees from a submenu. You set the colours with the left and right mouse button.