lib/mnit/numbers.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Copyright 2014 Alexis Laferrière <alexis.laf@xymus.net>
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at
   8 #
   9 #     http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16
  17 # Helper services to draw numbers on screen
  18 module numbers
  19
  20 import assets
  21
  22 # A set of images to draw numbers
  23 class NumberImages
  24
  25         # Images from 0 to 9
  26         var imgs: Array[Image]
  27
  28         private init(imgs: Array[Image]) do self.imgs = imgs
  29 end
  30
  31 redef class App
  32         # Load a `NumberImages` from the assets
  33         fun load_numbers(path: String): NumberImages
  34         do
  35                 var imgs = new Array[Image]
  36                 for d in [0..9] do imgs.add(load_image(path.replace("#", d.to_s)))
  37                 return new NumberImages(imgs)
  38         end
  39 end
  40
  41 redef class Display
  42         fun blit_number(imgs: NumberImages, number: Int, x, y: Int)
  43         do
  44                 var str = number.to_s
  45                 for c in str.chars do
  46                         var d = c.ascii-'0'.ascii
  47                         assert d >= 0 and d <= 9
  48                         var img = imgs.imgs[d]
  49                         blit(img, x, y)
  50                         x += (img.width.to_f * img.scale).to_i
  51                 end
  52         end
  53 end