SVG印刷対応とメディア情報APIを追加

SVG入力を現在テープ幅に自動フィットして印刷できるようにし、アプリ側が余白計算できるようにテープ幅・DPI・最小送り量を取得するAPIを追加する。

Made-with: Cursor

ruby/lib/libptouch/context.rb

@@ -93,6 +93,28 @@ module Libptouch
       [bytes, out_params[:width_dots], out_params[:height_dots]]
     end
 
+    def svg_file_to_raster_fit_current_tape(path, threshold: nil)
+      opt_ptr = nil
+      unless threshold.nil?
+        o = Binding::SvgOptions.new
+        o[:threshold] = threshold
+        opt_ptr = o.pointer
+      end
+      out_pp = FFI::MemoryPointer.new(:pointer)
+      out_len = FFI::MemoryPointer.new(:size_t)
+      out_params = Binding::RasterParams.new
+      raise_on_error(Binding.libptouch_svg_file_to_raster_fit_current_tape(
+                       @native, path, opt_ptr, out_pp, out_len, out_params.pointer
+                     ))
+      raw = out_pp.read_pointer
+      raise Libptouch::Error.new(OK, "null raster from SVG") if raw.null?
+
+      len = out_len.get(:size_t, 0)
+      bytes = raw.read_bytes(len)
+      Binding.libptouch_free_raster(raw)
+      [bytes, out_params[:width_dots], out_params[:height_dots]]
+    end
+
     def status_bytes
       buf = FFI::MemoryPointer.new(:uint8, STATUS_LENGTH)
       raise_on_error(Binding.libptouch_get_status(@native, buf))
@@ -102,5 +124,22 @@ module Libptouch
     def status_hash
       Libptouch.parse_status(status_bytes)
     end
+
+    def current_media_info
+      info = Binding::MediaInfo.new
+      raise_on_error(Binding.libptouch_get_current_media_info(@native, info.pointer))
+      {
+        media_width_code: info[:media_width_code],
+        media_kind_code: info[:media_kind_code],
+        print_dpi: info[:print_dpi],
+        feed_dpi: info[:feed_dpi],
+        tape_width_mm: info[:tape_width_mm],
+        printable_dots: info[:printable_dots],
+        left_margin_dots: info[:left_margin_dots],
+        right_margin_dots: info[:right_margin_dots],
+        min_feed_dots: info[:min_feed_dots],
+        min_feed_mm: info[:min_feed_mm]
+      }
+    end
   end
 end