World: r3wp
[Postscript] Emitting Postscript from REBOL
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Graham 6-Nov-2006 [1132x2] | ie. write %//prn for ltp1 |
and for usb postscript printers .. try this little trick http://synapsedirect.com/forums/thread/396.aspx | |
xavier 6-Nov-2006 [1134] | it worked ... i was searching a dialect for formatting outputs that have to be printed ... and just find it |
Geomol 6-Nov-2006 [1135x3] | :-) |
Documentation is coming up! | |
REBOL PostScript 0.3.0 dialect documentation: http://home.tiscali.dk/john.niclasen/postscript/postscript.html | |
Gregg 6-Nov-2006 [1138] | Very cool John! Now, if we can get a DisplayPostscript engine in R3.... |
Graham 6-Nov-2006 [1139] | Well, Carl did say he would fix View to assist with this ... |
Pekr 7-Nov-2006 [1140x2] | Graham - what is the problem with View, so that Carl has to put-in some fix? Coordinate system? Unicode chars? |
btw - do all (most) today's printers support postscript, even the small ones? | |
Graham 7-Nov-2006 [1142x2] | coordinate system, transformations and rotations are all different. |
And no. | |
Pekr 7-Nov-2006 [1144] | isn't it fixable in View level, by recalculation? |
Henrik 7-Nov-2006 [1145] | pekr, that's very hard, because the problem is also with font sizes. DRAW doesn't follow good conventions for sizes right now. VIEW is better, but it's all aliased graphics. |
Pekr 7-Nov-2006 [1146] | guys, then try to involve Cyphre into discussions of what you gurus need new View kernel should do under the hood. I think that work on new View engine started ... |
Henrik 7-Nov-2006 [1147] | I'm wondering what will happen to the relationship with DRAW and View. Right now it's quite disjointed. |
Pekr 7-Nov-2006 [1148] | exactly - and those things should be voiced and discussed. Now is the time to have new face type, or more face types (animation, or more rich ones (text)) etc. |
Henrik 7-Nov-2006 [1149] | also with two different font rendering engines... wouldn't View get smaller if freetype was used in View as well? |
Rebolek 7-Nov-2006 [1150] | you can't use current View for that task - you don't know font's baseline, so it's not possible to position different sizes of fonts on same line. |
Cyphre 7-Nov-2006 [1151] | Yes, you are right, there are two different font engines which is not much efficient. Moreover the DRAW text rendering was meant to be just for really simple labeling(the main text engine in R2 is still the original FACE text rendering) and it would need some improvements for more complex usage. All this should be unified and improved in R3. There will be only one text engine with rich-text dialect. |
Graham 7-Nov-2006 [1152] | Cyphre .. how feasible would a PS renderer be in R3? |
Pekr 7-Nov-2006 [1153] | Graham - isn't PS rendering "just" a question of particular dialect, translating into View faces rendering? (sorry, I am not fluent with PS, so dunno what would be needed, just asking) |
Graham 7-Nov-2006 [1154] | the AGG translation etc works differently from PS. |
Pekr 7-Nov-2006 [1155] | hmm, my opinion was based upon SVG dialect, which we were able to render, using translation into AGG ... |
Cyphre 7-Nov-2006 [1156x2] | Regarding the coordinate system: I''ll ty to thing how to incorporate both, the PS like and SVG like orientation. But do we really need this at low-level? IIRC I have posted some example how to change the coordinates using simple reparsing the coord values? |
Graham, I still don't know where is the problem to write any transformation function in Rebol to create any kind of coordinate system even in R2. Maybe I'm missing something? | |
Rebolek 7-Nov-2006 [1158] | I think one low-level coordination system is enough IF that system supports decimal pair! |
Cyphre 7-Nov-2006 [1159] | Yep, decimal pair!s would be hopefully added in R3 ;) |
Rebolek 7-Nov-2006 [1160] | great:) something, at least :) |
Pekr 7-Nov-2006 [1161x2] | what about parameter for face, specifying where your 0x0 is? I do remember, when Carl was at Viscorp, and they were working on ABL\E with Jim Goodnow, Carl stated, that new AmigaOS should be able to have windows with different resolution on one screen :-) |
I also do remember that View carried some 'span argument, but it was never of much usage ... | |
Rebolek 7-Nov-2006 [1163] | I remember some beta View documents about virtual coordinate space :) |
Graham 7-Nov-2006 [1164] | Cyphre, it's not just the coordinate system, it's rotation, scaling and transformations. |
Cyphre 7-Nov-2006 [1165] | what is different in PS tranformations vs DRAW? |
Graham 7-Nov-2006 [1166x4] | I did a demo somewhere which showed the problem. |
can't recall the specifics though. | |
the other thing that PS has is a way to save the graphic state .. do stuff... and then restore the state | |
rotate - in PS is anticlockwise, in Rebol is clockwise | |
Henrik 7-Nov-2006 [1170] | I would suggest that if DRAW is kept, that it would be possible to switch transformation and rotation modes to make it adaptable to more graphics systems. |
Pekr 7-Nov-2006 [1171x3] | maybe it is time for gurus to speak in some closed group and redesign face aproach? Do you remember Carl wanting to introduce kind of min-face? |
imo draw, as introduced to View, is a hack .... it lives in effect pipeline, is that correct? | |
maybe face, as a gob, should be more general, with some pluggable mechanisms .... | |
Cyphre 7-Nov-2006 [1174x2] | Henrik, yes we can add some 'options' for clockwise/anticlockwise etc. but keep in mind every such decission at runtime steals performance so sometime is better to generate the DRAW dialect with properly converted values. |
(It is really so hard to invert the rotation values at Rebol level when you need it?) | |
Rebolek 7-Nov-2006 [1176] | negate angle ;looks easy |
Cyphre 7-Nov-2006 [1177x2] | r: rot: 0 view layout [origin 0 box 400x400 white effect [draw [pen black translate 200x200 rotate rot translate -200x-200 box 100x150 300x250]] rate 0 feel [engage: func [f a e][if a = 'time [r: r + 1 rot: 360 // 360 - r show f]]]] |
(just paste to console) | |
Geomol 7-Nov-2006 [1179] | I like the look of DRAW! :-) (Of course it's due to AGG.) I still miss a version of REBOL for Mac with full DRAW, as the Windows version has it. |
Pekr 7-Nov-2006 [1180x2] | does'n't it have full draw, except fonts? |
btw - what happened to your Reluxe Paint? No other ambitions with that project? | |
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