no-reply@allegro.cc (Ojars_L) — Fri, 29 Jan 2016 16:39:53 +0000

Hi!
Decided to try new features offered by alx wrapper for Allegro 5. All works fine except getting bitmap font.
alx::Font normalfont; and
alx::Font titlefont;
is declared in the game.h file;
Commented out is my old code which works. Code:

#SelectExpand
  1void Game::load_fonts()
  2{
//ALLEGRO_BITMAP *temp;
//const int ranges[] = { 32, 126 };
  5
////normalfont
//temp = al_load_bitmap("Media/Fonts/ex06.pcx");
//al_convert_mask_to_alpha(temp, al_map_rgb(255, 0, 255));
//normalfont = al_grab_font_from_bitmap(temp, 1, ranges);

////titlefont
//temp = al_load_bitmap("Media/Fonts/TITLE_FONT.pcx");
//al_convert_mask_to_alpha(temp, al_map_rgb(0, 0, 0));
//titlefont = al_grab_font_from_bitmap(temp, 1, ranges);

alx::Bitmap temp;
std::vector<std::tuple<int, int>> ranges;
ranges.push_back(std::make_tuple(32, 126));

//normalfont
temp.load("Media/Fonts/ex06.pcx");
temp.convertMaskToAlpha(alx::Color(0xFF00FFFF));
normalfont.grab(temp, ranges);
 24
//titlefont
temp.load("Media/Fonts/TITLE_FONT.pcx");
temp.convertMaskToAlpha(alx::Color(0));
titlefont.grab(temp, ranges);
 29}

A grabber function from Font.hpp (namespace alx)

#SelectExpand
/**
      Creates a font from a bitmap.
      @param bmp bitmap.
      @param ranges ranges.
      @return true on success.
   */
  bool grab(const Bitmap &bmp, const std::vector<std::tuple<int, int>> &ranges) {
      std::vector<int> rangeBuffer;
      for(auto t : ranges) {
          rangeBuffer.push_back(std::get<0>(t));
          rangeBuffer.push_back(std::get<1>(t));
      }
      reset(al_grab_font_from_bitmap(bmp.get(), rangeBuffer.size(), rangeBuffer.data()), al_destroy_font);
      return (bool)(*this);
  }

I tried to debugger the code and all works until debugger brakes when returning from this function in a file

#SelectExpand
 1_Ty *get() const _NOEXCEPT
 2    {  // return pointer to resource
 3    return (this->_Get());
 4    }

It mean that there is not a resource from what return a pointer. Temp file is loaded correctly with a pointer to it.
Where then there is the problem?

no-reply@allegro.cc (SiegeLord) — Sat, 30 Jan 2016 11:00:04 +0000

This line is wrong:

reset(al_grab_font_from_bitmap(bmp.get(), rangeBuffer.size(), rangeBuffer.data()), al_destroy_font);

It should be ranges.size() rather than rangeBuffer.size().

no-reply@allegro.cc (Ojars_L) — Sat, 30 Jan 2016 11:58:32 +0000

Thank you.

Now it works.

Failed to get bitmap font with alx wrapper for Allegro 5