From 3584970fee943a99e61a18d08d06e549150efb81 Mon Sep 17 00:00:00 2001
From: artemp <artem@mapnik.org>
Date: Mon, 20 Feb 2017 12:13:00 +0100
Subject: [PATCH] make `shaping` unit test test something (work-in-progress)

---
 test/unit/text/shaping.cpp | 72 ++++++++++++++++++++++++++++++--------
 1 file changed, 57 insertions(+), 15 deletions(-)

diff --git a/test/unit/text/shaping.cpp b/test/unit/text/shaping.cpp
index d9da17efb..f8ba45e08 100644
--- a/test/unit/text/shaping.cpp
+++ b/test/unit/text/shaping.cpp
@@ -1,25 +1,67 @@
-
 #include "catch.hpp"
 #include <mapnik/text/icu_shaper.hpp>
 #include <mapnik/text/harfbuzz_shaper.hpp>
 #include <mapnik/text/font_library.hpp>
+#include <mapnik/unicode.hpp>
 
-TEST_CASE("shapers compile") {
-
-    mapnik::text_line line(0,0);
-    mapnik::text_itemizer itemizer;
+TEST_CASE("shaping")
+{
+    mapnik::freetype_engine::register_fonts("test/data/fonts/Noto");
+    mapnik::freetype_engine::register_font("test/data/fonts/NotoSans-Regular.ttc");
+    mapnik::font_set fontset("fontset");
+    for (auto const& name : mapnik::freetype_engine::face_names())
+    {
+        fontset.add_face_name(name);
+    }
+    mapnik::transcoder tr("utf8");
     std::map<unsigned,double> width_map;
     double scale_factor = 1;
     mapnik::font_library fl;
     mapnik::freetype_engine::font_file_mapping_type font_file_mapping;
     mapnik::freetype_engine::font_memory_cache_type font_memory_cache;
-    mapnik::face_manager fm(fl,font_file_mapping,font_memory_cache);
-    mapnik::harfbuzz_shaper::shape_text(line,itemizer,
-                                width_map,
-                                fm,
-                                scale_factor);
-    mapnik::icu_shaper::shape_text(line,itemizer,
-                                width_map,
-                                fm,
-                                scale_factor);
-}
\ No newline at end of file
+    mapnik::face_manager fm(fl, font_file_mapping, font_memory_cache);
+
+    mapnik::text_itemizer itemizer;
+    auto props = std::make_unique<mapnik::detail::evaluated_format_properties>();
+    props->fontset = fontset;
+    props->text_size = 64;
+
+    std::vector<std::tuple<unsigned, unsigned>> expected =
+        {{0, 0}, {0, 3}, {0, 4}, {0, 7}, {3, 8}, {11, 9}, {0, 10}, {0, 11}, {0, 12}, {12, 13}};
+    // with default NotoSans-Regular.ttc and NotoNaskhArabic-Regular.ttf ^^^
+
+    //std::vector<std::tuple<unsigned, unsigned>> expected =
+    //    {{977,0},{1094,3}{1038,4},{1168,4},{9,7},{3,8},{9,9},{20827,10},{11294,11},{42895,12},{10,13}};
+    // expected results if NotoSansCJKjp-Regular.otf and "NotoSansTibetan-Regular.ttf available and registered^^
+    auto ustr = tr.transcode("སྤུ་ཧྲེང (普兰镇)");
+    auto length = ustr.length();
+    itemizer.add_text(ustr, props);
+
+    {
+        mapnik::text_line line(0, length);
+        mapnik::harfbuzz_shaper::shape_text(line, itemizer,
+                                            width_map,
+                                            fm,
+                                            scale_factor);
+
+        std::size_t index = 0;
+        for (auto const& g : line)
+        {
+            unsigned glyph_index, char_index;
+            std::tie(glyph_index, char_index) = expected[index++];
+            //std::cerr << g.glyph_index << ":" << g.char_index << std::endl;
+            REQUIRE(glyph_index == g.glyph_index);
+            REQUIRE(char_index == g.char_index);
+        }
+    }
+#if 0
+    {
+        mapnik::text_line line(0, length);
+        mapnik::icu_shaper::shape_text(line,itemizer,
+                                       width_map,
+                                       fm,
+                                       scale_factor);
+
+    }
+#endif
+}