| /* |
| * Copyright 2020 Google LLC |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm/gm.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkFont.h" |
| #include "include/core/SkFontMgr.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPath.h" |
| #include "include/core/SkPictureRecorder.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkStream.h" |
| #include "include/core/SkString.h" |
| #include "include/utils/SkCustomTypeface.h" |
| #include "src/core/SkFontPriv.h" |
| #include "tools/Resources.h" |
| #include "tools/fonts/FontToolUtils.h" |
| |
| static sk_sp<SkDrawable> make_drawable(const SkPath& path) { |
| const auto bounds = path.computeTightBounds(); |
| |
| SkPictureRecorder recorder; |
| auto* canvas = recorder.beginRecording(bounds); |
| |
| SkPaint paint; |
| paint.setColor(0xff008000); |
| paint.setAntiAlias(true); |
| |
| canvas->drawPath(path, paint); |
| |
| return recorder.finishRecordingAsDrawable(); |
| } |
| |
| static sk_sp<SkTypeface> make_tf() { |
| SkCustomTypefaceBuilder builder; |
| SkFont font = ToolUtils::DefaultFont(); |
| SkASSERT(font.getTypeface()); |
| const float upem = font.getTypeface()->getUnitsPerEm(); |
| |
| // request a big size, to improve precision at the fontscaler level |
| font.setSize(upem); |
| font.setHinting(SkFontHinting::kNone); |
| |
| // so we can scale our paths back down to 1-point |
| const SkMatrix scale = SkMatrix::Scale(1.0f/upem, 1.0f/upem); |
| |
| { |
| SkFontMetrics metrics; |
| font.getMetrics(&metrics); |
| builder.setMetrics(metrics, 1.0f/upem); |
| } |
| builder.setFontStyle(font.getTypeface()->fontStyle()); |
| |
| // Steal the first 128 chars from the default font |
| for (SkGlyphID index = 0; index <= 127; ++index) { |
| SkGlyphID glyph = font.unicharToGlyph(index); |
| |
| SkScalar width; |
| font.getWidths(&glyph, 1, &width); |
| SkPath path; |
| font.getPath(glyph, &path); |
| path.transform(scale); |
| |
| // we use the charcode to be our glyph index, since we have no cmap table |
| if (index % 2) { |
| builder.setGlyph(index, width/upem, make_drawable(path), path.computeTightBounds()); |
| } else { |
| builder.setGlyph(index, width/upem, path); |
| } |
| } |
| |
| return builder.detach(); |
| } |
| |
| #include "include/core/SkTextBlob.h" |
| |
| static sk_sp<SkTypeface> round_trip(sk_sp<SkTypeface> tf) { |
| auto data = tf->serialize(); |
| SkMemoryStream stream(data->data(), data->size()); |
| sk_sp<SkTypeface> face = SkTypeface::MakeDeserialize(&stream, nullptr); |
| SkASSERT(face); |
| return face; |
| } |
| |
| class UserFontGM : public skiagm::GM { |
| sk_sp<SkTypeface> fTF; |
| |
| public: |
| UserFontGM() {} |
| |
| void onOnceBeforeDraw() override { |
| fTF = make_tf(); |
| // test serialization |
| fTF = round_trip(fTF); |
| } |
| |
| static sk_sp<SkTextBlob> make_blob(sk_sp<SkTypeface> tf, float size, float* spacing) { |
| SkFont font(tf); |
| font.setSize(size); |
| font.setEdging(SkFont::Edging::kAntiAlias); |
| *spacing = font.getMetrics(nullptr); |
| return SkTextBlob::MakeFromString("Typeface", font); |
| } |
| |
| bool runAsBench() const override { return true; } |
| |
| SkString getName() const override { return SkString("user_typeface"); } |
| |
| SkISize getISize() override { return {810, 452}; } |
| |
| void onDraw(SkCanvas* canvas) override { |
| auto waterfall = [&](sk_sp<SkTypeface> tf, bool defaultFace) { |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| |
| float spacing; |
| float x = 20, |
| y = 16; |
| for (float size = 9; size <= 100; size *= 1.25f) { |
| auto blob = make_blob(tf, size, &spacing); |
| |
| // shared baseline |
| if (defaultFace) { |
| paint.setColor(0xFFDDDDDD); |
| canvas->drawRect({0, y, 810, y+1}, paint); |
| } |
| |
| paint.setColor(0xFFCCCCCC); |
| paint.setStyle(SkPaint::kStroke_Style); |
| canvas->drawRect(blob->bounds().makeOffset(x, y), paint); |
| |
| paint.setStyle(SkPaint::kFill_Style); |
| paint.setColor(SK_ColorBLACK); |
| canvas->drawTextBlob(blob, x, y, paint); |
| |
| y += SkScalarRoundToInt(spacing * 1.25f + 2); |
| } |
| }; |
| |
| waterfall(ToolUtils::DefaultTypeface(), true); |
| canvas->translate(400, 0); |
| waterfall(fTF, false); |
| } |
| }; |
| DEF_GM(return new UserFontGM;) |