How to add word wrapping to texts in Magick++ - c++

Question

I am trying to add texts to images in Magick++ by doing so:
Method 1:
Magick::Image image(Magick::Geometry(800,800),Magick::Color("white"));
Magick::Color color(0,0,0,0);
image.font("Waree");
image.fontPointsize(36);
image.strokeColor(color);
image.fillColor(color);
image.annotate("HelloWorld!", NorthWestGravity);
Method 2:
Magick::Image image(Magick::Geometry(800,800),Magick::Color("white"));
Magick::Color color(0,0,0,0);
std::list<Magick::Drawable> text_draw_list;
text_draw_list.push_back(Magick::DrawableViewbox(0,0,image.columns(), image.rows()));
text_draw_list.push_back(Magick::DrawableFont("Waree", (Magick::StyleType)NormalStyle, 400, (Magick::StretchType)NormalStretch ));
text_draw_list.push_back(Magick::DrawablePointSize(36));
//Manual offsets
text_draw_list.push_back(Magick::DrawableText(0, 200, "HelloWorld!"));
text_draw_list.push_back(Magick::DrawableStrokeColor(color));
text_draw_list.push_back(Magick::DrawableFillColor(color));
image.draw(text_draw_list);
Method 1 calculates best offsets given the gravity but does not have any word wrapping if the text is out of bounds of the image.
Method 2 has Method 1's problem plus it assumes that the correct offsets have been calculated so the text is written at the correct position.
How do I add automatic word wrapping to either of the 2 methods but preferably to method 1?
P.S: ImageMagick has automatic word wrapping by using the caption option but I couldn't find caption in Magick++.
Edit: Ugly boundary control based on font size.
Magick::Image image(Magick::Geometry(800,800),Magick::Color("white"));
Magick::Color color(0,0,0,0);
image.font("Waree");
image.fontPointsize(36);
image.strokeColor(color);
image.fillColor(color);
std::string txt = "HelloWorld!";
Magick::TypeMetric typeMetrics;
double fontSize = 36;
image.fontTypeMetrics(txt, &typeMetrics);
while(fontSize > 0)
{
if(typeMetrics.textWidth() >= image.columns() || typeMetrics.textHeight() >= image.rows())
{
fontSize--;
image.fontTypeMetrics(txt, &typeMetrics);
}
}
image.annotate(txt, NorthWestGravity);

Answer 1

The best thing to do is read the caption.c source, and understand how word-wrapping is implemented. This would allow your application to have full control.
Another options would be to use PANGO: protocol. This would allow your content-author to have full control of word-wrapping, format, and many other font-display features.
But for the quickest approach, as you mentioned, caption already does this. But caption is not a method, but a file protocol.
#include <Magick++.h>
using namespace Magick;
int main(int argc, const char * argv[]) {
InitializeMagick(argv[0]);
Image words(Geometry(250,250), Color("white"));
words.backgroundColor(Color("lime")); // might not be needed.
words.font("Avenir-Heavy");
words.fillColor(Color("firebrick"));
words.strokeColor(Color("yellow"));
words.read("CAPTION:Hello World!"); // <---- CAPTION: protocol
words.write("/tmp/words.jpg");
return 0;
}