Font variations.

tests/FontConfigParser.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Resources.h"
 #include "SkCommandLineFlags.h"
 #include "SkFontConfigParser_android.h"
 #include "Test.h"
 
+#include <cmath>
+#include <cstdio>
+
 DECLARE_bool(verboseFontMgr);
 
 int CountFallbacks(SkTDArray<FontFamily*> fontFamilies) {
     int countOfFallbackFonts = 0;
     for (int i = 0; i < fontFamilies.count(); i++) {
         if (fontFamilies[i]->fIsFallbackFont) {
             countOfFallbackFonts++;
         }
     }
     return countOfFallbackFonts;
@@ skipping 61 matching lines @@
             SkDebugf("  name %s\n", fontFamilies[i]->fNames[j].c_str());
         }
         for (int j = 0; j < fontFamilies[i]->fFonts.count(); ++j) {
             const FontFileInfo& ffi = fontFamilies[i]->fFonts[j];
             SkDebugf("  file (%d) %s#%d\n", ffi.fWeight, ffi.fFileName.c_str(), ffi.fIndex);
         }
     }
     SkDebugf("\n\n");
 }
 
+template <int N, typename T> static double test_parse_fixed_r(skiatest::Reporter* reporter,
+                                                              double low, double high, double inc)
+{
+    double SK_FixedMax_double = nextafter(1 << (sizeof(T) * CHAR_BIT - N - 1), 0.0);
+    double SK_FixedEpsilon_double = (1.0 / (1 << N));
+    double maxError = 0;
+    char buffer[64];
+    for (double f = low; f < high; f += inc) {
+        SkString s;
+        // 'sprintf' formatting as expected depends on the current locale being "C".
+        // We currently expect tests and tools to run in the "C" locale.
+        sprintf(buffer, "%.20f", f);
+        T fix;
+        bool b = parse_fixed<N>(buffer, &fix);
+        if (b) {
+            double f2 = fix * SK_FixedEpsilon_double;
+            double error = fabs(f - f2);
+            REPORTER_ASSERT(reporter,  error <= SK_FixedEpsilon_double);
+            maxError = SkTMax(maxError, error);
+        } else {
+            REPORTER_ASSERT(reporter, f < -SK_FixedMax_double || SK_FixedMax_double < f);
+        }
+    }
+
+    //SkDebugf("maxError: %.20f\n", maxError);
+    return maxError;
+}
+
+static void test_parse_fixed(skiatest::Reporter* reporter) {
+    test_parse_fixed_r<27, int32_t>(reporter, -8.1, -7.9, 0.000001);
+    test_parse_fixed_r<27, int32_t>(reporter, -0.1, 0.1, 0.000001);
+    test_parse_fixed_r<27, int32_t>(reporter, 7.9, 8.1, 0.000001);
+    test_parse_fixed_r<16, int32_t>(reporter, -0.125, 0.125, 1.0 / (1 << 19));
+    test_parse_fixed_r<16, int32_t>(reporter, -32768.125, -32766.875, 1.0 / (1 << 17));
+    test_parse_fixed_r<16, int32_t>(reporter, 32766.875, 32768.125, 1.0 / (1 << 17));
+    test_parse_fixed_r<16, int32_t>(reporter, -1.1, 1.1, 0.0001);
+
+    SkFixed fix;
+    REPORTER_ASSERT(reporter, !parse_fixed<27>("-17.1", &fix));
+    REPORTER_ASSERT(reporter, !parse_fixed<16>("32768", &fix));
+    REPORTER_ASSERT(reporter, !parse_fixed<16>("", &fix));
+    REPORTER_ASSERT(reporter, !parse_fixed<16>(".", &fix));
+    REPORTER_ASSERT(reporter, !parse_fixed<16>("123.", &fix));
+    REPORTER_ASSERT(reporter, !parse_fixed<16>("a", &fix));
+    REPORTER_ASSERT(reporter, !parse_fixed<16>(".123a", &fix));
+}
+
 DEF_TEST(FontConfigParserAndroid, reporter) {
+    test_parse_fixed(reporter);
 
     bool resourcesMissing = false;
 
     SkTDArray<FontFamily*> preV17FontFamilies;
     SkFontConfigParser::GetCustomFontFamilies(preV17FontFamilies,
         SkString("/custom/font/path/"),
         GetResourcePath("android_fonts/pre_v17/system_fonts.xml").c_str(),
         GetResourcePath("android_fonts/pre_v17/fallback_fonts.xml").c_str());
 
     if (preV17FontFamilies.count() > 0) {
@@ skipping 25 matching lines @@
     }
 
 
     SkTDArray<FontFamily*> v22FontFamilies;
     SkFontConfigParser::GetCustomFontFamilies(v22FontFamilies,
         SkString("/custom/font/path/"),
         GetResourcePath("android_fonts/v22/fonts.xml").c_str(),
         NULL);
 
     if (v22FontFamilies.count() > 0) {
-        REPORTER_ASSERT(reporter, v22FontFamilies.count() == 53);
+        REPORTER_ASSERT(reporter, v22FontFamilies.count() == 54);
         REPORTER_ASSERT(reporter, CountFallbacks(v22FontFamilies) == 42);
 
         DumpLoadedFonts(v22FontFamilies, "version 22");
         ValidateLoadedFonts(v22FontFamilies, "Roboto-Thin.ttf", reporter);
     } else {
         resourcesMissing = true;
     }
 
     if (resourcesMissing) {
         SkDebugf("---- Resource files missing for FontConfigParser test\n");
     }
 }