[softwarelist] Re: New alpha version of DPlngScan
- From: "tim@xxxxxxxxx" <tim@xxxxxxxxx>
- To: davidpilling@xxxxxxxxxxxxx
- Date: Sun, 20 Jan 2019 22:43:40 +0000
On 18 Jan 2019, at 2:32 pm, Chris Johnson <chris@xxxxxxxxxxxxxxxxxxxxx> wrote:
In article <577847acf9dave@xxxxxxxxxxxxx>,
Dave Symes <dave@xxxxxxxxxxxxx> wrote:
In article <a03d2d7857.Bernard@xxxxxxxxxxxxxxxx>,
Bernard Veasey <bernard@xxxxxxxxxxxxxx> wrote:
[Snippy]
Comparing it with Photodesk 3.14-17 - if I load a sprite and then
save as a JPG it appends /jpg to the filename. If I save a
second time, it is still saved as a JPG with a /jpg extension. I
also notice that the image within Photodesk is still a sprite, so
the user could go back to saving as a sprite (or whatever) if
needed without loss of quality. This seems to be the correct
behaviour to me.
That's the standard state in all the graphics apps I ever used...
Well, yes. DPScan is similar. Once an image is loaded, it is stored
internally as an RGB raster, similar to a sprite. When a save is
performed, the image data is converted to the appropriate format.
However, the actual image data stored internally is not touched by
the save process. Therefore the image quality is not compromised by
saving as a jpeg.
It is really a question of what DPScan should consider as the default
filetype / filename once a save is performed.
I too treasure DPlngScan and am delighted to hear that it is being given some
thought.
The mention of JPGs above raises in my mind the supposed fact that saving a
file to Jpeg immediately loses definition. So I avoid jpegs like the plague.
But we have to use them sometimes. Can DPngScan:
(a) Give us an indication of the loss that will occur on saving to JPG (and GIF
for that matter)?
(b) The fact that DP*s*n stores the original file internally as a sprite does
not quite give the original enough attention. Should there be some concept of
a Master image format and should DP*s*n always ensure that this is preserved on
disc when any other image format is saved?
(c) Moving on to a possibly enormous extension that may well be completely
infeasible, could DP*s*n be extended to receive in vector format files and save
them out as rasters? I wonder if AWViewer could do something handy here? And
if Draw and Artworks files can be handled, what about SVG - and I know that
while ArtWorks can create SVG files, it cannot read them.
Tim
--
Tim Powys-Lybbe
tim@xxxxxxxxx
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