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DaSpamer
Grandmaster Cheater Supreme
 Reputation: 52
Joined: 13 Sep 2011
Posts: 1578
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 Posted: Wed Feb 11, 2015 7:27 pm Post subject: Drawing forms contents. |
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I have a form and inside of it a panel with massive width (that has lot's of objects).
I'm trying to copy the 'offscreen' content of the form&panel and draw it into an image (in another form).
I'm not quite sure how the function printToRasterImage works, as it draws for me a black rect (even when using in visible area).
Let's say I have this object
| Code: | app = {}
app.init = function()
local self = app;
self.form = createForm();
self.form.width = 600;
self.form.height = 450;
self.panel = createPanel(self.form);
self.panel.width = 1800;
self.panel.height = 450;
local lastcol = 0;
local color = 0;
local clrs = {0x1186b6,0x2dbdf3,0xefa210,0x9d20dd,0x443dc8,0x2b6905,0x1843eb}
local mf,mr = math.floor,math.random
for i=1,25 do
local obj = createImage(self.panel);
obj.left = 5 + mf(self.panel.width / 25)*(i-1);
obj.top = mf(self.panel.height/2);
obj.Canvas.Brush.Color = (function () while color==lastcol do color = clrs[mr(1,7)] end lastcol = color return color end)();
obj.Canvas.fillRect(0,0,obj.width,obj.height);
end
end
app.init();
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And I want to draw offscreen (600-1200) do the image object below
| Code: | f = createForm();
i = createImage(f);
i.width = f.width;
i.height = f.height;
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Without recreating the objects (huge performance impact).
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Dark Byte
Site Admin
 Reputation: 458
Joined: 09 May 2003
Posts: 25296
Location: The netherlands
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| Posted: Thu Feb 12, 2015 4:57 am Post subject: |
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i'm not sure that's possible, if it's not visible it won't get rendered(painted)
why not use a different design? e. g. create that second form from the start and fill that with the extra controls insteads
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DaSpamer
Grandmaster Cheater Supreme
Reputation: 52
Joined: 13 Sep 2011
Posts: 1578
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| Posted: Thu Feb 12, 2015 9:59 am Post subject: |
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| Dark Byte wrote: | i'm not sure that's possible, if it's not visible it won't get rendered(painted)
why not use a different design? e. g. create that second form from the start and fill that with the extra controls insteads |
I'm working on some side fun project.
Thing is, lot's of objects being created which cause heavy performance, so I'm trying to clone part of main window (creating like a preview), which shouldn't use too much resources (as there is no need to mix 4 or images into 1 object and change pixelformat).
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