Implemented 2D Fonts

Selecting 2D fonts

In any class implementing mrpt::utils::CCanvas, the text font can be selected using CCanvas::selectTextFont. Next, text can be drawn with CCanvas::textOut. Note that one of the most commonly used implementations of CCanvas is CImage.

List of fonts

“6×13”
“6x13B” (bold)
“6x13O” (italic)
“9×15”
“9x15B” (bold)
“10×20”
“18x18ja” (Japanese, UNICODE character values)

The following image is taken from the example MRPT/samples/textFonts, refer to the source code for further details.

[spoiler title=”See C++ code” style=”2″]

#include &lt;mrpt/utils.h&gt;
#include &lt;mrpt/gui.h&gt;

using namespace mrpt;
using namespace mrpt::gui;
using namespace mrpt::utils;
using namespace std;

// ------------------------------------------------------
//				TestFonts
// ------------------------------------------------------
void TestFonts()
{
	CImage		img(400,300);

	img.filledRectangle(0,0,400,300, TColor(0x50,0x50,0x50) );

	int y = 10;
	img.selectTextFont(&quot;5x7&quot;);
	img.textOut(10,y,&quot;Hello World! with font \&quot;5x7\&quot;&quot;, TColor::white); y+=20;

	img.selectTextFont(&quot;6x13&quot;);
	img.textOut(10,y,&quot;Hello World! with font \&quot;6x13\&quot;&quot;, TColor::white); y+=20;

	img.selectTextFont(&quot;6x13B&quot;);
	img.textOut(10,y,&quot;Hello World! with font \&quot;6x13B\&quot;&quot;, TColor::white); y+=20;

	img.selectTextFont(&quot;6x13O&quot;);
	img.textOut(10,y,&quot;Hello World! with font \&quot;6x13O\&quot;&quot;, TColor::white); y+=20;

	img.selectTextFont(&quot;9x15&quot;);
	img.textOut(10,y,&quot;Hello World! with font \&quot;9x15\&quot;&quot;, TColor::white); y+=20;

	img.selectTextFont(&quot;9x15B&quot;);
	img.textOut(10,y,&quot;Hello World! with font \&quot;9x15B\&quot;&quot;, TColor::white); y+=20;

	img.selectTextFont(&quot;18x18ja&quot;);
	img.textOut(10,y,&quot;MRPTのフォントは易しいです!&quot;, TColor::white); y+=20;

	img.selectTextFont(&quot;10x20&quot;);
	img.textOut(10,y,&quot;Hello World! with font \&quot;10x20\&quot;&quot;, TColor::white); y+=20;


    CDisplayWindow		win1(&quot;MRPT - Demo of text fonts render&quot;);
    win1.setPos(10,10);
    win1.showImage( img );

    cout &lt;&lt; &quot;Push a key in the console or in the window to continue...&quot;;
    win1.waitForKey();
    cout &lt;&lt; &quot;Done&quot; &lt;&lt; endl;
}

// ------------------------------------------------------
//		MAIN
// ------------------------------------------------------
int main()
{
	try
	{
		TestFonts();
		return 0;
	} catch (std::exception &amp;e)
	{
		std::cout &lt;&lt; &quot;MRPT exception caught: &quot; &lt;&lt; e.what() &lt;&lt; std::endl;
		return -1;
	}
	catch (...)
	{
		printf(&quot;Untyped exception!!&quot;);
		return -1;
	}
}

#include <mrpt/utils.h>

#include <mrpt/gui.h>

using namespace mrpt;

using namespace mrpt::gui;

using namespace mrpt::utils;

using namespace std;

// ------------------------------------------------------

// TestFonts

// ------------------------------------------------------

void TestFonts()

{

CImage img(400,300);

img.filledRectangle(0,0,400,300, TColor(0x50,0x50,0x50) );

int y = 10;

img.selectTextFont("5x7");

img.textOut(10,y,"Hello World! with font \"5x7\"", TColor::white); y+=20;

img.selectTextFont("6x13");

img.textOut(10,y,"Hello World! with font \"6x13\"", TColor::white); y+=20;

img.selectTextFont("6x13B");

img.textOut(10,y,"Hello World! with font \"6x13B\"", TColor::white); y+=20;

img.selectTextFont("6x13O");

img.textOut(10,y,"Hello World! with font \"6x13O\"", TColor::white); y+=20;

img.selectTextFont("9x15");

img.textOut(10,y,"Hello World! with font \"9x15\"", TColor::white); y+=20;

img.selectTextFont("9x15B");

img.textOut(10,y,"Hello World! with font \"9x15B\"", TColor::white); y+=20;

img.selectTextFont("18x18ja");

img.textOut(10,y,"MRPTのフォントは易しいです!", TColor::white); y+=20;

img.selectTextFont("10x20");

img.textOut(10,y,"Hello World! with font \"10x20\"", TColor::white); y+=20;

CDisplayWindow win1("MRPT - Demo of text fonts render");

win1.setPos(10,10);

win1.showImage( img );

cout << "Push a key in the console or in the window to continue...";

win1.waitForKey();

cout << "Done" << endl;

}

// ------------------------------------------------------

// MAIN

// ------------------------------------------------------

int main()

{

try

{

TestFonts();

return 0;

} catch (std::exception &e)

{

std::cout << "MRPT exception caught: " << e.what() << std::endl;

return -1;

}

catch (...)

{

printf("Untyped exception!!");

return -1;

}

[/spoiler]