Add nativeFonts flag to Viewer.

This moves DMFontMgr and several related files which are tightly related
to fonts into tools/fonts, moves some flags around to prevent
duplication, and adds the nativeFonts handling to Viewer.

Change-Id: Id1bdad708a6b74319ac5ac9adfe21025db4ca0b2
Reviewed-on: https://skia-review.googlesource.com/108904
Commit-Queue: Ben Wagner <bungeman@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>

1 files changed, 148 insertions, 0 deletions

diff --git a/tools/fonts/sk_tool_utils_font.cpp b/tools/fonts/sk_tool_utils_font.cpp
new file mode 100644
index 0000000000..d2aac851bb
--- /dev/null
+++ b/tools/fonts/sk_tool_utils_font.cpp
@@ -0,0 +1,148 @@
+/*
+ * 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 "SkCommonFlags.h"
+#include "SkFontMgr.h"
+#include "SkFontStyle.h"
+#include "SkMutex.h"
+#include "SkOSFile.h"
+#include "SkTestScalerContext.h"
+#include "SkUtils.h"
+#include "sk_tool_utils.h"
+
+namespace sk_tool_utils {
+
+#include "test_font_monospace.inc"
+#include "test_font_sans_serif.inc"
+#include "test_font_serif.inc"
+#include "test_font_index.inc"
+
+void release_portable_typefaces() {
+    for (int index = 0; index < gTestFontsCount; ++index) {
+        SkTestFontData& fontData = gTestFonts[index];
+        fontData.fCachedFont.reset();
+    }
+}
+
+SK_DECLARE_STATIC_MUTEX(gTestFontMutex);
+
+sk_sp<SkTypeface> create_font(const char* name, SkFontStyle style) {
+    SkTestFontData* fontData = nullptr;
+    const SubFont* sub;
+    if (name) {
+        for (int index = 0; index < gSubFontsCount; ++index) {
+            sub = &gSubFonts[index];
+            if (!strcmp(name, sub->fName) && sub->fStyle == style) {
+                fontData = &sub->fFont;
+                break;
+            }
+        }
+        if (!fontData) {
+            // Once all legacy callers to portable fonts are converted, replace this with
+            // SK_ABORT();
+            SkDebugf("missing %s weight %d, width %d, slant %d\n",
+                     name, style.weight(), style.width(), style.slant());
+            // If we called SkTypeface::CreateFromName() here we'd recurse infinitely,
+            // so we reimplement its core logic here inline without the recursive aspect.
+            sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault());
+            return fm->legacyMakeTypeface(name, style);
+        }
+    } else {
+        sub = &gSubFonts[gDefaultFontIndex];
+        fontData = &sub->fFont;
+    }
+    sk_sp<SkTestFont> font;
+    {
+        SkAutoMutexAcquire ac(gTestFontMutex);
+        if (fontData->fCachedFont) {
+            font = fontData->fCachedFont;
+        } else {
+            font = sk_make_sp<SkTestFont>(*fontData);
+            fontData->fCachedFont = font;
+        }
+    }
+    return sk_make_sp<SkTestTypeface>(std::move(font), style);
+}
+
+sk_sp<SkTypeface> emoji_typeface() {
+#if defined(SK_BUILD_FOR_WIN)
+    sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault());
+    const char *colorEmojiFontName = "Segoe UI Emoji";
+    sk_sp<SkTypeface> typeface(fm->matchFamilyStyle(colorEmojiFontName, SkFontStyle()));
+    if (typeface) {
+        return typeface;
+    }
+    sk_sp<SkTypeface> fallback(fm->matchFamilyStyleCharacter(
+        colorEmojiFontName, SkFontStyle(), nullptr /* bcp47 */, 0 /* bcp47Count */,
+        0x1f4b0 /* character: 💰 */));
+    if (fallback) {
+        return fallback;
+    }
+    // If we don't have Segoe UI Emoji and can't find a fallback, try Segoe UI Symbol.
+    // Windows 7 does not have Segoe UI Emoji; Segoe UI Symbol has the (non - color) emoji.
+    return SkTypeface::MakeFromName("Segoe UI Symbol", SkFontStyle());
+
+#elif defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS)
+    return SkTypeface::MakeFromName("Apple Color Emoji", SkFontStyle());
+
+#else
+    return MakeResourceAsTypeface("fonts/Funkster.ttf");
+
+#endif
+}
+
+const char* emoji_sample_text() {
+#if defined(SK_BUILD_FOR_WIN) || defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS)
+    return "\xF0\x9F\x92\xB0" "\xF0\x9F\x8F\xA1" "\xF0\x9F\x8E\x85"  // 💰🏡🎅
+           "\xF0\x9F\x8D\xAA" "\xF0\x9F\x8D\x95" "\xF0\x9F\x9A\x80"  // 🍪🍕🚀
+           "\xF0\x9F\x9A\xBB" "\xF0\x9F\x92\xA9" "\xF0\x9F\x93\xB7"  // 🚻💩📷
+           "\xF0\x9F\x93\xA6"                                        // 📦
+           "\xF0\x9F\x87\xBA" "\xF0\x9F\x87\xB8" "\xF0\x9F\x87\xA6"; // 🇺🇸🇦
+#else
+    return "Hamburgefons";
+#endif
+}
+
+static const char* platform_os_name() {
+    for (int index = 0; index < FLAGS_key.count(); index += 2) {
+        if (!strcmp("os", FLAGS_key[index])) {
+            return FLAGS_key[index + 1];
+        }
+    }
+    return "";
+}
+
+static bool extra_config_contains(const char* substring) {
+    for (int index = 0; index < FLAGS_key.count(); index += 2) {
+        if (0 == strcmp("extra_config", FLAGS_key[index])
+                && strstr(FLAGS_key[index + 1], substring)) {
+            return true;
+        }
+    }
+    return false;
+}
+
+const char* platform_font_manager() {
+    if (extra_config_contains("GDI")) {
+        return "GDI";
+    }
+    if (extra_config_contains("NativeFonts")){
+        return platform_os_name();
+    }
+    return "";
+}
+
+sk_sp<SkTypeface> create_portable_typeface(const char* name, SkFontStyle style) {
+    return create_font(name, style);
+}
+
+void set_portable_typeface(SkPaint* paint, const char* name, SkFontStyle style) {
+    paint->setTypeface(create_font(name, style));
+}
+
+}