Re: [Lazarus] Examples of CairoCanvas usage
On Tue, Feb 10, 2015 at 10:43:34AM +0200, Juha Manninen wrote:
On Tue, Feb 10, 2015 at 9:14 AM, Petr Kristan petr.kris...@epos.cz wrote:
My commandline program version must be linked with gtk in linux.
I use this construction:
WidgetSet := TGtk2WidgetSet.Create;
DrawingRoutine;
FreeAndNil(WidgetSet);
How to use the WidgetSet?
Can you please test with TextOut(), and maybe send a simple example
program or application. I still have not found any.
I would be happy to add an example directory below
components\cairocanvas if you want.
Here is an linux working example:
{$mode objfpc}{$H+}
uses
Classes, SysUtils, Gtk2Int, InterfaceBase, CairoCanvas,
GdkCairoCanvas, Printers;
var
c: TFilePrinterCanvas;
begin
WidgetSet := TGtk2WidgetSet.Create;
c := TCairoPdfCanvas.Create(nil);
c.OutputFileName := '/tmp/a.pdf';
c.XDPI := 75;
c.YDPI := 75;
c.PaperWidth := 100;
c.PaperHeight := 100;
c.Font.Name := 'Arial';
c.Font.Height := 12;
c.TextOut(0, 0, 'Hello word');
FreeAndNil(c);
FreeAndNil(WidgetSet);
end.
Petr
--
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.
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tel: +420 461101401Czech Republic (Eastern Europe)
fax: +420 461101481
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Re: [Lazarus] Examples of CairoCanvas usage
On Tue, Feb 10, 2015 at 03:53:16PM +0200, Juha Manninen wrote: On Tue, Feb 10, 2015 at 11:40 AM, Petr Kristan petr.kris...@epos.cz wrote: c.Font.Name := 'Arial'; c.Font.Height := 12; Wow, my test code only needed the font definition, then it works. My bad, I should have tested that. Normal GUI canvas has some font by default. I added a simple program to components/cairocanvas/example which draws an ellipse and text. You can improve it if you want and send a patch. Your example adds a dependency for GTK2. It is logically wrong if you only want to demonstrate CairoCanvas. My understanding is that GTK2 depends on CairoCanvas, not the other way around. What is the purpose of the WidgetSet variable? You create it but don't use it for anything. My prog works without it now that it has a font defined. The only dependency in the uses section of my program is CairoCanvas. It is about two years when I used this last time. And it was neded. It is good to hear, that I can remove this dependency. Petr -- Petr Kristan . EPOS PRO s.r.o., Smilova 333, 530 02 Pardubice tel: +420 461101401Czech Republic (Eastern Europe) fax: +420 461101481 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Examples of CairoCanvas usage
On Mon, Feb 09, 2015 at 09:19:46PM +0200, Juha Manninen wrote: On Linux it does not throw an exception but it does not work either. There is no text. I tested other CairoCanvas variants, PS and PNG, and they behave the same. The code is in ancestor TCairoPrinterCanvas.TextOut. Has anybody tried text output with CairoCanvas? Maybe it only works with graphics. I normaly use it with graphics. My commandline program version must be linked with gtk in linux. I use this construction: WidgetSet := TGtk2WidgetSet.Create; DrawingRoutine; FreeAndNil(WidgetSet); Petr -- Petr Kristan . EPOS PRO s.r.o., Smilova 333, 530 02 Pardubice tel: +420 461101401Czech Republic (Eastern Europe) fax: +420 461101481 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Examples of CairoCanvas usage
On Tue, Feb 03, 2015 at 02:01:27AM +0200, Juha Manninen wrote: Does anybody have examples for the package CairoCanvas_pkg that comes with Lazarus? The package dir has none. I am most interested in textual data + PDF, thus TCairoPdfCanvas and TCairoPsCanvas, but other examples are welcome, too. TCairoCanvas works as clasic TCanvas. You can create TCairo*Canvas of your choice, set some specific properties as OutputFileName, XDPI, YDPI, PaperWidth, PaperHeight, Orientation and draw on it like on normal TCanvas. Petr -- Petr Kristan . EPOS PRO s.r.o., Smilova 333, 530 02 Pardubice tel: +420 461101401Czech Republic (Eastern Europe) fax: +420 461101481 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
[Lazarus] Memo - scroll to caret position
Hi. I set Memo.CaretPos and I want to scroll memo to be caret visible. I found some solution in windows: Perform(EM_SCROLLCARET, 0, 0); But how to solve it in Linux and GTK2? I tried: Memo.VertScrollBar.Position := Round(Line*Memo.VertScrollBar.Range/Memo.Lines.Count); but this scrolls only with ScrollBar and not with memo. Thanks Petr -- Petr Kristan . EPOS PRO s.r.o., Smilova 333, 530 02 Pardubice tel: +420 461101401Czech Republic (Eastern Europe) fax: +420 461101481 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
[Lazarus] Custom GraphicsControl - need Canvas to set Height outside OnPaint
Hi. I'am creating an graphics control and I need Canvas to set control Height. But I can draw (access to Canvas) only in OnPaint event. How to solve this problem? Thanks Petr -- Petr Kristan . EPOS PRO s.r.o., Smilova 333, 530 02 Pardubice tel: +420 461101401Czech Republic (Eastern Europe) fax: +420 461101481 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Custom GraphicsControl - need Canvas to set Height outside OnPaint
On Mon, Apr 07, 2014 at 11:11:28AM +0200, zeljko wrote: On 04/07/2014 11:01 AM, Petr Kristan wrote: Hi. I'am creating an graphics control and I need Canvas to set control Height. But I can draw (access to Canvas) only in OnPaint event. How to solve this problem? You need to set height of control by calculating text height out of paint event ? I'm using TBitmap for such measurements. Create bitmap, assign control font to bmp canvas, measure. Tanks for fast helpfull responses. Petr -- Petr Kristan . EPOS PRO s.r.o., Smilova 333, 530 02 Pardubice tel: +420 461101401Czech Republic (Eastern Europe) fax: +420 461101481 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Optimize DBGrid speed
On Mon, Jan 06, 2014 at 03:21:56PM +0200, Juha Manninen wrote: On Mon, Jan 6, 2014 at 2:29 PM, Petr Kristan petr.kris...@epos.cz wrote: I'am trying to minimize whole DBGrid redraw. Where I can discuss my steps to avoid my pointless work. Most of code what I plan to change was commited by jesus. The choices are this list or private mails with Jesus (jesus...@gmail.com). It depends on how interesting the discussion is for other people. (See the related thread about private communication :) You should send a private mail in any case because he may not notice this. I tried it, but no response till now. Then I try try send another question about grid speed opt. here. In the beginning of Grid paint is Canvas.GetClipRect called to obtain area which wee must redraw. This function directly calls WidgetSet.GetClipBox. I find out difference betwen Win32 and gtk2 bahaviour of this func. In gtk2 TGtk2WidgetSet.GetClipBox returns previously Invalidated area (through DC.PaintRectangle = PS.rcPaint retrieved in BeginPaint) But in win32 directly calls Windows.GetClipBox, but this func returns whole grid area. Do not takes account on invalidated area retrieved in BeginPaint. Result of this difference is whole grid redraw in windows, even if only one cell is invalidated. Question si how to correct this? Modify TWin32WidgetSet.GetClipBox to behave as TGtk2WidgetSet.GetClipBox? I'am not sure, because GetClipBox should probably correspond to Win32 documentation. How is this solved in another widgetsets? Petr -- Petr Kristan . EPOS PRO s.r.o., Smilova 333, 530 02 Pardubice tel: +420 461101401Czech Republic (Eastern Europe) fax: +420 461101481 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Optimize DBGrid speed
On Wed, Jan 08, 2014 at 02:35:08PM +0100, Hans-Peter Diettrich wrote: Petr Kristan schrieb: In the beginning of Grid paint is Canvas.GetClipRect called to obtain area which wee must redraw. This function directly calls WidgetSet.GetClipBox. I find out difference betwen Win32 and gtk2 bahaviour of this func. In gtk2 TGtk2WidgetSet.GetClipBox returns previously Invalidated area (through DC.PaintRectangle = PS.rcPaint retrieved in BeginPaint) But in win32 directly calls Windows.GetClipBox, but this func returns whole grid area. Do not takes account on invalidated area retrieved in BeginPaint. It may be a bug in the Win32 widgetset, invalidating the entire control area instead of only the affected cell, *or* some special handling of invalidated areas by Windows. I remember that Windows used to extend the UpdateRect to include *all* invalidated parts of the DC. This can lead to a big update area, when a single bit at the top left and at the bottom right of the DC was invalidated. This may have changed in the meantime, though. My idea was wrong, I overlook something in debug logs. Canvas.GetClipRect returns correct value. Problem must be in another place. First Paint has correct update rect, but then second Paint is called on whole grid. Petr -- Petr Kristan . EPOS PRO s.r.o., Smilova 333, 530 02 Pardubice tel: +420 461101401Czech Republic (Eastern Europe) fax: +420 461101481 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
[Lazarus] Optimize DBGrid speed
I'am trying to minimize whole DBGrid redraw. Where I can discuss my steps to avoid my pointless work. Most of code what I plan to change was commited by jesus. Petr -- Petr Kristan . EPOS PRO s.r.o., Smilova 333, 530 02 Pardubice tel: +420 461101401Czech Republic (Eastern Europe) fax: +420 461101481 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] How to exec some gdb command on start in lazarus
On Mon, Jun 24, 2013 at 04:31:10PM +0100, martin wrote: On 24/06/13 16:11, Petr Kristan wrote: Hallo I want to send this command to gdb: handle SIGPIPE nostop noprint pass to ignore SIGPIPE. I set it in my ~/.gdbinit, but Lazarus ignores it. I tried write it to Debugger_Startup_Options, but without success. the Debugger_Startup_Options, would be like --eval-command=handle SIGPIPE nostop noprint pass if you are on windows IIRC gdb does not take this option. Thank you for the fast response. I try it, but I get this message: Debugger: Initialization output: Undefined command: \\. Try \help\.\n In processes i have /usr/bin/gdb -silent -i mi -nx --eval-command=handle SIGPIPE nostop noprint pass But gdb already stops on SIGPIPE. If I try run /usr/bin/gdb -silent -i mi -nx --eval-command=handle SIGPIPE nostop noprint pass from bash, then it works ok. Petr -- Petr Kristan . EPOS PRO s.r.o., Smilova 333, 530 02 Pardubice tel: +420 461101401Czech Republic (Eastern Europe) fax: +420 461101481 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] How to exec some gdb command on start in lazarus
On Tue, Jun 25, 2013 at 10:07:10AM +0100, martin wrote: On 25/06/13 07:49, Petr Kristan wrote: Thank you for the fast response. I try it, but I get this message: Debugger: Initialization output: Undefined command: \\. Try \help\.\n In processes i have /usr/bin/gdb -silent -i mi -nx --eval-command=handle SIGPIPE nostop noprint pass But gdb already stops on SIGPIPE. If I try run /usr/bin/gdb -silent -i mi -nx --eval-command=handle SIGPIPE nostop noprint pass from bash, then it works ok. Did you try single quotes ? looks like the parts of the command line are not correctly broken into individual args. Yes. With the same result. I try to debug Debugger_Startup_Options: --eval-command=handle SIGPIPE nostop noprint pass with strace and here is execve line: [pid 20053] execve(/usr/bin/gdb, [/usr/bin/gdb, -silent, -i, mi, -nx, --eval-command=\handle SIGPIPE nostop noprint pass\], [/* 52 vars */]) = 0 IMHO it looks ok. Petr -- Petr Kristan . EPOS PRO s.r.o., Smilova 333, 530 02 Pardubice tel: +420 461101401Czech Republic (Eastern Europe) fax: +420 461101481 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
[Lazarus] How to exec some gdb command on start in lazarus
Hallo I want to send this command to gdb: handle SIGPIPE nostop noprint pass to ignore SIGPIPE. I set it in my ~/.gdbinit, but Lazarus ignores it. I tried write it to Debugger_Startup_Options, but without success. Petr -- Petr Kristan . EPOS PRO s.r.o., Smilova 333, 530 02 Pardubice tel: +420 461101401Czech Republic (Eastern Europe) fax: +420 461101481 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
[Lazarus] Remove transparency
Hi all, Is possible to remove transparency from loaded png? Setting Transparent property to false does not work. It sets only Masked to false. I found problem with printing transparent images on some printers in windows xp. Some printers does not print nothing in place of transparent image. I use practically only 1bit transparency, but images has are now with 8bit alpha. Petr -- Petr Kristan . EPOS PRO s.r.o., Bozeny Nemcove 2625, 530 02 Pardubice tel: +420 466335223Czech Republic (Eastern Europe) fax: +420 466510709 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Portable way to get accurate timestamps?
On Sun, Feb 20, 2011 at 02:46:34PM +0100, Luca Olivetti wrote: Al 20/02/11 12:42, En/na Bo Berglund ha escrit: I wonder if GetTickCount will get me a better value to milliseconds than Now()? Not under linux: function GetTickCount: DWord; begin Result := DWord(Trunc(Now * 24 * 60 * 60 * 1000)); end; My Linux version: function GetTickCount: Cardinal; var ts: TTimeSpec; i: Int64; begin if clock_gettime(CLOCK_MONOTONIC, @ts) 0 then begin //kernels 2.4.* does not support Result := 0; Exit; end; i := ts.tv_sec; i := i*1000 + ts.tv_nsec div 100; Result := i and $; //cut to unsig 32bit end; Petr -- Petr Kristan . EPOS PRO s.r.o., Bozeny Nemcove 2625, 530 02 Pardubice tel: +420 466335223Czech Republic (Eastern Europe) fax: +420 466510709 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] GetTextMetrics in TCanvas proposal
On Sun, Apr 04, 2010 at 04:57:06PM -0700, Jesus Reyes wrote: --- El vie 26-mar-10, petr.kris...@epos.cz petr.kris...@epos.cz escribió: De:: petr.kris...@epos.cz petr.kris...@epos.cz Asunto: Re: [Lazarus] GetTextMetrics in TCanvas proposal A: Lazarus mailing list lazarus@lists.lazarus.freepascal.org Fecha: viernes, 26 de marzo de 2010, 6:58 On Fri, Mar 26, 2010 at 12:19:07PM +0100, Marc Weustink wrote: Paul Ishenin wrote: 26.03.2010 16:20, petr.kris...@epos.cz wrote: Thanks all for their reactions :( Developers sometimes are busy with their projects :( Is another place where I can discuss? Is another place where LCL core developers response my few questions? In the irc channel #lazarus-ide I have done my work on cairo canvas. It can be used as separate package. Where should I put it? Certainly if comunity have an interest. You idea is not bad to add GetTextMetrics. Create a patch and a test. Then add them to the bug tracker. The only thing we need to ask ourselves is, do we need the inner TTextMetric or can we use some more userfriendly version ? How to imagine myself userfriendly? Petr In r24429, I added a initial version of the function GetTextMetrics to canvas, it works like standard winpi GetTextMetrics but it takes a TLCLTextMetrics record where we can add fields that can be implemented in all targets, currently only Ascender, Descender and Height are implemented in PostscriptCanvas which allows to fix a bug in TurboPower IPro print preview. Still waiting for you Cairo canvas stuff. I merge GetTextMetrics and Cairo will be ready. Where I should send it? Mantis has 2kB limit. Petr -- Petr Kristan . EPOS PRO s.r.o., Bozeny Nemcove 2625, 530 02 Pardubice tel: +420 466335223Czech Republic (Eastern Europe) fax: +420 466510709 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] GetTextMetrics in TCanvas proposal
On Wed, Mar 24, 2010 at 10:32:31AM +0100, petr.kris...@epos.cz wrote:
Hallo.
I suggest to add function function GetTextMetrics(var TM: TTextMetric):
boolean; into TCanvas class.
If user wants to work with text on Canvas and mix different fonts on one
line, he needs minimally to know Ascent and Descent metrics of the font.
But TCanvas has only TextExtent function. If user renders text on the
screen (or printer in Win), then uses lclintf.GetTextMetrics.
But if renders on TPoscriptCanvas or upcoming TCairoCanvas he must use
some TCairoCanvas.GetTextMetrics or still non existing
TPoscriptCanvas.GetTextMetrics.
It cause ugly non oop construction like:
{$IFDEF USE_CAIRO}
if Canvas is TCairoCanvas then
(Canvas as TCairoCanvas).GetTextMetrics(tm)
else
GetTextMetrics(tm);
{$ELSE}
GetTextMetrics(tm);
{$ENDIF}
For that reason I propose to add virtual function GetTextMetrics into
TCanvas.
Is this proposal acceptable?
If it is, how to move ahead to reach this goal.
Thanks all for their reactions :(
Is another place where I can discuss? Is another place where LCL core
developers response
my few questions?
I have done my work on cairo canvas. It can be used as separate package.
Where should I put it? Certainly if comunity have an interest.
Petr
--
Petr Kristan
.
EPOS PRO s.r.o., Bozeny Nemcove 2625, 530 02 Pardubice
tel: +420 466335223Czech Republic (Eastern Europe)
fax: +420 466510709
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Re: [Lazarus] GetTextMetrics in TCanvas proposal
On Fri, Mar 26, 2010 at 04:35:28PM +0700, Paul Ishenin wrote: 26.03.2010 16:20, petr.kris...@epos.cz wrote: Thanks all for their reactions :( Developers sometimes are busy with their projects :( I suppose it :) Is another place where I can discuss? Is another place where LCL core developers response my few questions? In the irc channel #lazarus-ide I have done my work on cairo canvas. It can be used as separate package. Where should I put it? Certainly if comunity have an interest. You idea is not bad to add GetTextMetrics. Create a patch and a test. Then add them to the bug tracker. I'l try it. And what to do with finished cairo canvas package? Send tarball to the list? Petr -- Petr Kristan . EPOS PRO s.r.o., Bozeny Nemcove 2625, 530 02 Pardubice tel: +420 466335223Czech Republic (Eastern Europe) fax: +420 466510709 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] GetTextMetrics in TCanvas proposal
On Fri, Mar 26, 2010 at 12:19:07PM +0100, Marc Weustink wrote: Paul Ishenin wrote: 26.03.2010 16:20, petr.kris...@epos.cz wrote: Thanks all for their reactions :( Developers sometimes are busy with their projects :( Is another place where I can discuss? Is another place where LCL core developers response my few questions? In the irc channel #lazarus-ide I have done my work on cairo canvas. It can be used as separate package. Where should I put it? Certainly if comunity have an interest. You idea is not bad to add GetTextMetrics. Create a patch and a test. Then add them to the bug tracker. The only thing we need to ask ourselves is, do we need the inner TTextMetric or can we use some more userfriendly version ? How to imagine myself userfriendly? Petr -- Petr Kristan . EPOS PRO s.r.o., Bozeny Nemcove 2625, 530 02 Pardubice tel: +420 466335223Czech Republic (Eastern Europe) fax: +420 466510709 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
[Lazarus] GetTextMetrics in TCanvas proposal
Hallo.
I suggest to add function function GetTextMetrics(var TM: TTextMetric):
boolean; into TCanvas class.
If user wants to work with text on Canvas and mix different fonts on one
line, he needs minimally to know Ascent and Descent metrics of the font.
But TCanvas has only TextExtent function. If user renders text on the
screen (or printer in Win), then uses lclintf.GetTextMetrics.
But if renders on TPoscriptCanvas or upcoming TCairoCanvas he must use
some TCairoCanvas.GetTextMetrics or still non existing
TPoscriptCanvas.GetTextMetrics.
It cause ugly non oop construction like:
{$IFDEF USE_CAIRO}
if Canvas is TCairoCanvas then
(Canvas as TCairoCanvas).GetTextMetrics(tm)
else
GetTextMetrics(tm);
{$ELSE}
GetTextMetrics(tm);
{$ENDIF}
For that reason I propose to add virtual function GetTextMetrics into
TCanvas.
Is this proposal acceptable?
If it is, how to move ahead to reach this goal.
Petr
--
Petr Kristan
.
EPOS PRO s.r.o., Bozeny Nemcove 2625, 530 02 Pardubice
tel: +420 466335223Czech Republic (Eastern Europe)
fax: +420 466510709
--
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Re: [Lazarus] TCairoCanvas integration
On Wed, Mar 10, 2010 at 03:22:31PM +0100, petr.kris...@epos.cz wrote: Hi. Main work on TCairoCanvas = class(TPrinterCanvas) is almost done. My question is how to integrate it into LCL? IMHO user should have a choice which TPrinterCanvas implementation use. Now in TCUPSPrinter is hard coded TPostscriptPrinterCanvas: function TCUPSPrinter.GetCanvasRef: TPrinterCanvasRef; begin Result:=TPostscriptPrinterCanvas; end; Petr Nobody here, who can halp me to integrate TCairoCanvas into LCL? Were in LCL directory structure place cairocanvas.pas (depends only on libcairo) and gdkcairocanvas.pas (depends extra on libgdk). How should programer select which implementation of TPrinterCanvas will be created in TPrinter.GetCanvas. Now TCUPSPrinter implementation use hard coded TPostscriptPrinterCanvas and needs access to TPostscriptPrinterCanvas(Canvas).OutputFileName. My TCairoCanvas implementation has the same needs. I do not want to waste my time if comunity do not have an interest to include CairoCanvas into lcl. Petr -- Petr Kristan . EPOS PRO s.r.o., Bozeny Nemcove 2625, 530 02 Pardubice tel: +420 466335223Czech Republic (Eastern Europe) fax: +420 466510709 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] TCairoCanvas integration
On Thu, Mar 11, 2010 at 02:20:46PM +0100, zeljko wrote: On Thursday 11 March 2010 14:08, petr.kris...@epos.cz wrote: Nobody here, who can halp me to integrate TCairoCanvas into LCL? Were in LCL directory structure place cairocanvas.pas (depends only on libcairo) and gdkcairocanvas.pas (depends extra on libgdk). How should programer select which implementation of TPrinterCanvas will be created in TPrinter.GetCanvas. Now TCUPSPrinter implementation use hard coded TPostscriptPrinterCanvas and needs access to TPostscriptPrinterCanvas(Canvas).OutputFileName. My TCairoCanvas implementation has the same needs. I do not want to waste my time if comunity do not have an interest to include CairoCanvas into lcl. Well, nobody said that it will not be included, but probably developers don't have enough spare time to review your work at the moment. Probably best way would be to open mantis issue about this and attach your changes as patch. Now I do not ask to review my work, I only need a little help with a few questions. In order to prepare complete include patch. Petr -- Petr Kristan . EPOS PRO s.r.o., Bozeny Nemcove 2625, 530 02 Pardubice tel: +420 466335223Czech Republic (Eastern Europe) fax: +420 466510709 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] TCairoCanvas integration
On Thu, Mar 11, 2010 at 02:23:15PM +0100, Michael Van Canneyt wrote: On Thu, 11 Mar 2010, petr.kris...@epos.cz wrote: On Wed, Mar 10, 2010 at 03:22:31PM +0100, petr.kris...@epos.cz wrote: Hi. Main work on TCairoCanvas = class(TPrinterCanvas) is almost done. My question is how to integrate it into LCL? IMHO user should have a choice which TPrinterCanvas implementation use. Now in TCUPSPrinter is hard coded TPostscriptPrinterCanvas: function TCUPSPrinter.GetCanvasRef: TPrinterCanvasRef; begin Result:=TPostscriptPrinterCanvas; end; Petr Nobody here, who can halp me to integrate TCairoCanvas into LCL? Were in LCL directory structure place cairocanvas.pas (depends only on libcairo) and gdkcairocanvas.pas (depends extra on libgdk). How should programer select which implementation of TPrinterCanvas will be created in TPrinter.GetCanvas. Now TCUPSPrinter implementation use hard coded TPostscriptPrinterCanvas and needs access to TPostscriptPrinterCanvas(Canvas).OutputFileName. My TCairoCanvas implementation has the same needs. I do not want to waste my time if comunity do not have an interest to include CairoCanvas into lcl. I think you should create an abstract TFilePrinterCanvas descendent of TPrinterCanvas (with the needed FileName property) and define a variable Type TFilePrinterCanvas = Class of TFilePrinterCanvas; Var CupsCanvasClass : TFilePrinterCanvas = TPostscriptPrinterCanvas; which the programmer can set, if so desired. then the TCUPSPrinter.GetCanvasRef implementation checks the CupsCanvasClass variable. If it is set, it uses the class defined there, and if not, it uses TPostscriptPrinterCanvas. Thanks. This corresponds with my idea. Where is recommeded place for cairocanvas.pas and gdkcairocanvas.pas in lcl? CairoCanvas can work on Windows, Linux and Mac OS X. Petr -- Petr Kristan . EPOS PRO s.r.o., Bozeny Nemcove 2625, 530 02 Pardubice tel: +420 466335223Czech Republic (Eastern Europe) fax: +420 466510709 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] TCairoCanvas integration
On Thu, Mar 11, 2010 at 02:50:04PM +0100, Mattias Gaertner wrote: On Thu, 11 Mar 2010 14:41:18 +0100 petr.kris...@epos.cz wrote: On Thu, Mar 11, 2010 at 02:23:15PM +0100, Michael Van Canneyt wrote: On Thu, 11 Mar 2010, petr.kris...@epos.cz wrote: On Wed, Mar 10, 2010 at 03:22:31PM +0100, petr.kris...@epos.cz wrote: Hi. Main work on TCairoCanvas = class(TPrinterCanvas) is almost done. My question is how to integrate it into LCL? IMHO user should have a choice which TPrinterCanvas implementation use. Now in TCUPSPrinter is hard coded TPostscriptPrinterCanvas: function TCUPSPrinter.GetCanvasRef: TPrinterCanvasRef; begin Result:=TPostscriptPrinterCanvas; end; Petr Nobody here, who can halp me to integrate TCairoCanvas into LCL? Were in LCL directory structure place cairocanvas.pas (depends only on libcairo) and gdkcairocanvas.pas (depends extra on libgdk). How should programer select which implementation of TPrinterCanvas will be created in TPrinter.GetCanvas. Now TCUPSPrinter implementation use hard coded TPostscriptPrinterCanvas and needs access to TPostscriptPrinterCanvas(Canvas).OutputFileName. My TCairoCanvas implementation has the same needs. I do not want to waste my time if comunity do not have an interest to include CairoCanvas into lcl. I think you should create an abstract TFilePrinterCanvas descendent of TPrinterCanvas (with the needed FileName property) and define a variable Type TFilePrinterCanvas = Class of TFilePrinterCanvas; Var CupsCanvasClass : TFilePrinterCanvas = TPostscriptPrinterCanvas; which the programmer can set, if so desired. then the TCUPSPrinter.GetCanvasRef implementation checks the CupsCanvasClass variable. If it is set, it uses the class defined there, and if not, it uses TPostscriptPrinterCanvas. Thanks. This corresponds with my idea. Where is recommeded place for cairocanvas.pas and gdkcairocanvas.pas in lcl? CairoCanvas can work on Windows, Linux and Mac OS X. lcl/interfaces/gtk2 I think this is good place for gdkcairocanvas.pas. But cairocanvas.pas needs only libcairo. It do not needs gtk. Petr -- Petr Kristan . EPOS PRO s.r.o., Bozeny Nemcove 2625, 530 02 Pardubice tel: +420 466335223Czech Republic (Eastern Europe) fax: +420 466510709 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] TCairoCanvas integration
On Thu, Mar 11, 2010 at 03:01:18PM +0100, Mattias Gaertner wrote: On Thu, 11 Mar 2010 14:54:48 +0100 petr.kris...@epos.cz wrote: On Thu, Mar 11, 2010 at 02:50:04PM +0100, Mattias Gaertner wrote: On Thu, 11 Mar 2010 14:41:18 +0100 petr.kris...@epos.cz wrote: On Thu, Mar 11, 2010 at 02:23:15PM +0100, Michael Van Canneyt wrote: On Thu, 11 Mar 2010, petr.kris...@epos.cz wrote: On Wed, Mar 10, 2010 at 03:22:31PM +0100, petr.kris...@epos.cz wrote: Hi. Main work on TCairoCanvas = class(TPrinterCanvas) is almost done. My question is how to integrate it into LCL? IMHO user should have a choice which TPrinterCanvas implementation use. Now in TCUPSPrinter is hard coded TPostscriptPrinterCanvas: function TCUPSPrinter.GetCanvasRef: TPrinterCanvasRef; begin Result:=TPostscriptPrinterCanvas; end; Petr Nobody here, who can halp me to integrate TCairoCanvas into LCL? Were in LCL directory structure place cairocanvas.pas (depends only on libcairo) and gdkcairocanvas.pas (depends extra on libgdk). How should programer select which implementation of TPrinterCanvas will be created in TPrinter.GetCanvas. Now TCUPSPrinter implementation use hard coded TPostscriptPrinterCanvas and needs access to TPostscriptPrinterCanvas(Canvas).OutputFileName. My TCairoCanvas implementation has the same needs. I do not want to waste my time if comunity do not have an interest to include CairoCanvas into lcl. I think you should create an abstract TFilePrinterCanvas descendent of TPrinterCanvas (with the needed FileName property) and define a variable Type TFilePrinterCanvas = Class of TFilePrinterCanvas; Var CupsCanvasClass : TFilePrinterCanvas = TPostscriptPrinterCanvas; which the programmer can set, if so desired. then the TCUPSPrinter.GetCanvasRef implementation checks the CupsCanvasClass variable. If it is set, it uses the class defined there, and if not, it uses TPostscriptPrinterCanvas. Thanks. This corresponds with my idea. Where is recommeded place for cairocanvas.pas and gdkcairocanvas.pas in lcl? CairoCanvas can work on Windows, Linux and Mac OS X. lcl/interfaces/gtk2 I think this is good place for gdkcairocanvas.pas. But cairocanvas.pas needs only libcairo. It do not needs gtk. Well, it should be added to the fpc sources, but till this is in a release we have to add this unit to the lazarus sources too. Ok. I place it into lcl/ along poscriptcanvas.pas. Petr -- Petr Kristan . EPOS PRO s.r.o., Bozeny Nemcove 2625, 530 02 Pardubice tel: +420 466335223Czech Republic (Eastern Europe) fax: +420 466510709 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] TCairoCanvas integration
On Thu, Mar 11, 2010 at 03:16:24PM +0100, Mattias Gaertner wrote: On Thu, 11 Mar 2010 15:08:57 +0100 petr.kris...@epos.cz wrote: On Thu, Mar 11, 2010 at 03:01:18PM +0100, Mattias Gaertner wrote: [...] Where is recommeded place for cairocanvas.pas and gdkcairocanvas.pas in lcl? CairoCanvas can work on Windows, Linux and Mac OS X. lcl/interfaces/gtk2 I think this is good place for gdkcairocanvas.pas. But cairocanvas.pas needs only libcairo. It do not needs gtk. Well, it should be added to the fpc sources, but till this is in a release we have to add this unit to the lazarus sources too. Ok. I place it into lcl/ along poscriptcanvas.pas. lcl/ only contains platform independent sources (they must use a minimum of external libraries). Platform dependent things should be placed in lcl/interfaces/... I think that non gtk users won't use cairo, so better place it in lcl/interfaces/gtk2. Windows or MacOSX user can use TCairoCanvas for export to pdf, ps, svg or png. He only needs libcairo which do not depends on gtk. Dependency is reversed, libgtk depends on libcairo. For example Firefox 3 (gecko) uses Cairo on all platforms. If will be interest we can easily make TWin32CairoCanvas, TX11CairoCanvas or TQuartzCairoCanvas (OSX) and render on screen. This should establish quite correct multiplatform WYSIWYG. I myself think about to use it on Linux/gtk2 and Win32 for screen and printing in our DTP like project. But if you still prefer lcl/interfaces/gtk2, I place it there. Petr -- Petr Kristan . EPOS PRO s.r.o., Bozeny Nemcove 2625, 530 02 Pardubice tel: +420 466335223Czech Republic (Eastern Europe) fax: +420 466510709 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] TCairoCanvas integration
On Thu, Mar 11, 2010 at 07:37:12AM -0800, Jesus Reyes wrote: I place it into lcl/ along poscriptcanvas.pas. lcl/ only contains platform independent sources (they must use a minimum of external libraries). Platform dependent things should be placed in lcl/interfaces/... I think that non gtk users won't use cairo, so better place it in lcl/interfaces/gtk2. Mattias -- I think it would be good to make it an independent package available in Lazarus, not necessarily linked to the LCL or FPC and at the same time available to users from different OS and widgetsets, the quality and the multi backend ability is certainly something that not only gtk users want. It sounds good. I make CUPSPrinter switch: Var CupsCanvasClass : TFilePrinterCanvas = TPostscriptPrinterCanvas; and remaining can be easily independent. Petr -- Petr Kristan . EPOS PRO s.r.o., Bozeny Nemcove 2625, 530 02 Pardubice tel: +420 466335223Czech Republic (Eastern Europe) fax: +420 466510709 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
[Lazarus] Raster image data in RGB24 or ARGB32
Hi. I'am working on Cairo Canvas implementation and for implementing StretchDraw function I need to get RasterImage data in format RGB24 or ARGB32. CAIRO_FORMAT_ARGB32 each pixel is a 32-bit quantity, with alpha in the upper 8 bits, then red, then green, then blue. The 32-bit quantities are stored native-endian. Pre-multiplied alpha is used. (That is, 50% transparent red is 0x8080, not 0x80ff.) CAIRO_FORMAT_RGB24 each pixel is a 32-bit quantity, with the upper 8 bits unused. Red, Green, and Blue are stored in the remaining 24 bits in that order. Can I use TLazIntfImage for this task and how? Thanks. Petr -- Petr Kristan . EPOS PRO s.r.o., Bozeny Nemcove 2625, 530 02 Pardubice tel: +420 466335223Czech Republic (Eastern Europe) fax: +420 466510709 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] lazarus as normal user
On Thu, Feb 18, 2010 at 10:48:17AM -0300, Pino Zollo wrote: Hi to the list, I am just a beginner with lazarus I have installed it on my Debian 5.01first fpc an then I have compiled lazarus from sources copied in /usr/src/lazarus. Easiest way, but any user on your machine can modify /usr/src/lazarus Run as root: cd /usr/src/lazarus find -type d -print0 | xargs -0 chmod 777 find -type d -print0 | xargs -0 chmod 666 or Only USER and root can work with Lazarus: cd /usr/src/lazarus chown USER * -R(USER means your normal login name) Then do not work with lazarus as root. /usr/src/lazarus/startlazarus should work. It happens that all goes fine if I run lazarus as root (deprecated by Debian) from /usr/src/lazarus...I can compile examples and run them. I can even install new components and they appear into the IDE. The problem rises if I run lazarus as normal user. Having made make install now I have /usr/local/bin/lazarus-ide available to all users . If I run /usr/local/bin/lazarus-ide I have a hell of problems: Units are not found anymore when compiling examples: For any subdir I have to add into fpc.cfg a new entry -uF When lazarus rebuilds for a new components it does it to the original /usr/src/lazarus but then it is /usr/local/bin/lazarus-ide that is restartedso I do not see any change into the IDE. I have tried to compile lazarus as a normal user having the sources in /home/myuser/lazarus but this does not succeed. Please some advise Regards Pino pinozollo at gmail dot com http://www.qsl.net/zp4kfx/Linux -- Petr Kristan . EPOS PRO s.r.o., Bozeny Nemcove 2625, 530 02 Pardubice tel: +420 466335223Czech Republic (Eastern Europe) fax: +420 466510709 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] lazarus as normal user
On Thu, Feb 18, 2010 at 09:41:38AM -0500, waldo kitty wrote: On 2/18/2010 09:10, petr.kris...@epos.cz wrote: On Thu, Feb 18, 2010 at 10:48:17AM -0300, Pino Zollo wrote: Hi to the list, I am just a beginner with lazarus I have installed it on my Debian 5.01first fpc an then I have compiled lazarus from sources copied in /usr/src/lazarus. Easiest way, but any user on your machine can modify /usr/src/lazarus Run as root: cd /usr/src/lazarus find -type d -print0 | xargs -0 chmod 777 find -type d -print0 | xargs -0 chmod 666 is the above a typo? first it set mode 777 and then sets the same things to 666?? i think there's a booboo there... Yes, sorry find -type f -print0 | xargs -0 chmod 666 But Mattias sends better and complex solution. Petr -- Petr Kristan . EPOS PRO s.r.o., Bozeny Nemcove 2625, 530 02 Pardubice tel: +420 466335223Czech Republic (Eastern Europe) fax: +420 466510709 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
[Lazarus] Printing in Linux
Hi. I'am working on multiplatform Win/Lin app whose main job is graphics printing. In Windows all works ok, but in Linux output postscript is wrong. After little digging I found that TPoscriptCanvas is responsible for it. I have a question about Lazarus future plans in rendering graphics output to postscript. Shouldn't be better to use for example Cairo than make poscript output yourself? Petr -- Petr Kristan . EPOS PRO s.r.o., Bozeny Nemcove 2625, 530 02 Pardubice tel: +420 466335223Czech Republic (Eastern Europe) fax: +420 466510709 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Printing in Linux
On Mon, Feb 15, 2010 at 11:13:12AM -0200, Felipe Monteiro de Carvalho wrote: On Mon, Feb 15, 2010 at 6:23 AM, petr.kris...@epos.cz wrote: Shouldn't be better to use for example Cairo than make poscript output yourself? The printing package is implemented by operating system rather then by widgetset, so if you use Cairo it would only work with LCL-Gtk2 and a new code would need to be written for LCL-Qt. I maybe don`t understand your answer. In Windows is rendering for printer implemented by operating system WinAPI. But in Unix we need to render into postscript. Now it is realised by TPoscriptCanvas which do not use any library, but output is erroneous. As I know, Qt has its own rendering engine (screen and printer). For example Kylix uses it. And I now do not know if in LCL exists TQtCanvas used by LCL-Qt. Cairo library is multiplatform and renders into X11, Win32, PS, PDF, ... It do not depends on gtk. Dependency is reversed -- new Gtk2 uses Cairo to render widgets. For example WebKit and Firefox3 uses this library on all platforms. http://en.wikipedia.org/wiki/Cairo_(graphics) What about to make TCairoCanvas and use it by default in LCL-Gtk2. IMHO generated postscript output should be better then TPoscriptCanvas makes. TCairoCanvas (certainly with corresponding library) can be useful in other platforms. Rendering into PDF, SVG or PNG may be convenience to anybody. Petr -- Petr Kristan . EPOS PRO s.r.o., Bozeny Nemcove 2625, 530 02 Pardubice tel: +420 466335223Czech Republic (Eastern Europe) fax: +420 466510709 -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
