Mike Reed | b0210d2 | 2020-05-07 16:58:40 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2020 Google LLC |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #include "gm/gm.h" |
| 9 | #include "include/core/SkCanvas.h" |
| 10 | #include "include/core/SkFont.h" |
| 11 | #include "include/core/SkPaint.h" |
| 12 | #include "include/core/SkPath.h" |
| 13 | #include "include/core/SkSize.h" |
| 14 | #include "include/core/SkString.h" |
| 15 | #include "include/utils/SkCustomTypeface.h" |
| 16 | #include "tools/Resources.h" |
| 17 | |
| 18 | static sk_sp<SkTypeface> make_tf() { |
Florin Malita | 340cd9c | 2020-05-14 16:21:53 -0400 | [diff] [blame] | 19 | SkCustomTypefaceBuilder builder; |
Mike Reed | b0210d2 | 2020-05-07 16:58:40 -0400 | [diff] [blame] | 20 | SkFont font; |
Mike Reed | d240d76 | 2020-05-19 12:50:48 -0400 | [diff] [blame^] | 21 | const float upem = font.getTypefaceOrDefault()->getUnitsPerEm(); |
| 22 | |
| 23 | // request a big size, to improve precision at the fontscaler level |
| 24 | font.setSize(upem); |
Mike Reed | b0210d2 | 2020-05-07 16:58:40 -0400 | [diff] [blame] | 25 | font.setHinting(SkFontHinting::kNone); |
| 26 | |
Mike Reed | d240d76 | 2020-05-19 12:50:48 -0400 | [diff] [blame^] | 27 | // so we can scale our paths back down to 1-point |
| 28 | const SkMatrix scale = SkMatrix::Scale(1.0f/upem, 1.0f/upem); |
| 29 | |
Mike Reed | 98bc22c | 2020-05-18 16:17:05 -0400 | [diff] [blame] | 30 | { |
| 31 | SkFontMetrics metrics; |
| 32 | font.getMetrics(&metrics); |
Mike Reed | d240d76 | 2020-05-19 12:50:48 -0400 | [diff] [blame^] | 33 | builder.setMetrics(metrics, 1.0f/upem); |
Mike Reed | 98bc22c | 2020-05-18 16:17:05 -0400 | [diff] [blame] | 34 | } |
| 35 | |
Mike Reed | b0210d2 | 2020-05-07 16:58:40 -0400 | [diff] [blame] | 36 | // Steal the first 128 chars from the default font |
| 37 | for (SkGlyphID index = 0; index <= 127; ++index) { |
| 38 | SkGlyphID glyph = font.unicharToGlyph(index); |
| 39 | |
| 40 | SkScalar width; |
| 41 | font.getWidths(&glyph, 1, &width); |
| 42 | SkPath path; |
| 43 | font.getPath(glyph, &path); |
| 44 | |
| 45 | // we use the charcode to be our glyph index, since we have no cmap table |
Mike Reed | d240d76 | 2020-05-19 12:50:48 -0400 | [diff] [blame^] | 46 | builder.setGlyph(index, width/upem, path.makeTransform(scale)); |
Mike Reed | b0210d2 | 2020-05-07 16:58:40 -0400 | [diff] [blame] | 47 | } |
| 48 | |
| 49 | return builder.detach(); |
| 50 | } |
| 51 | |
| 52 | #include "include/core/SkTextBlob.h" |
| 53 | |
Mike Reed | 98bc22c | 2020-05-18 16:17:05 -0400 | [diff] [blame] | 54 | static sk_sp<SkTypeface> round_trip(sk_sp<SkTypeface> tf) { |
| 55 | auto data = tf->serialize(); |
| 56 | SkMemoryStream stream(data->data(), data->size()); |
| 57 | return SkTypeface::MakeDeserialize(&stream); |
| 58 | } |
| 59 | |
Mike Reed | b0210d2 | 2020-05-07 16:58:40 -0400 | [diff] [blame] | 60 | class UserFontGM : public skiagm::GM { |
| 61 | sk_sp<SkTypeface> fTF; |
Mike Reed | b0210d2 | 2020-05-07 16:58:40 -0400 | [diff] [blame] | 62 | |
Mike Reed | b0210d2 | 2020-05-07 16:58:40 -0400 | [diff] [blame] | 63 | public: |
| 64 | UserFontGM() {} |
| 65 | |
| 66 | void onOnceBeforeDraw() override { |
| 67 | fTF = make_tf(); |
Mike Reed | 98bc22c | 2020-05-18 16:17:05 -0400 | [diff] [blame] | 68 | // test serialization |
| 69 | fTF = round_trip(fTF); |
Mike Reed | 2ddf7f3 | 2020-05-18 14:06:38 -0400 | [diff] [blame] | 70 | } |
Mike Reed | b0210d2 | 2020-05-07 16:58:40 -0400 | [diff] [blame] | 71 | |
Mike Reed | 98bc22c | 2020-05-18 16:17:05 -0400 | [diff] [blame] | 72 | static sk_sp<SkTextBlob> make_blob(sk_sp<SkTypeface> tf, float size, float* spacing) { |
Mike Reed | 2ddf7f3 | 2020-05-18 14:06:38 -0400 | [diff] [blame] | 73 | SkFont font(tf); |
| 74 | font.setSize(size); |
Mike Reed | b0210d2 | 2020-05-07 16:58:40 -0400 | [diff] [blame] | 75 | font.setEdging(SkFont::Edging::kAntiAlias); |
Mike Reed | 98bc22c | 2020-05-18 16:17:05 -0400 | [diff] [blame] | 76 | *spacing = font.getMetrics(nullptr); |
Mike Reed | 2ddf7f3 | 2020-05-18 14:06:38 -0400 | [diff] [blame] | 77 | return SkTextBlob::MakeFromString("Typeface", font); |
Mike Reed | b0210d2 | 2020-05-07 16:58:40 -0400 | [diff] [blame] | 78 | } |
| 79 | |
| 80 | bool runAsBench() const override { return true; } |
| 81 | |
| 82 | SkString onShortName() override { return SkString("user_typeface"); } |
| 83 | |
Mike Reed | 98bc22c | 2020-05-18 16:17:05 -0400 | [diff] [blame] | 84 | SkISize onISize() override { return {810, 452}; } |
Mike Reed | b0210d2 | 2020-05-07 16:58:40 -0400 | [diff] [blame] | 85 | |
| 86 | void onDraw(SkCanvas* canvas) override { |
Mike Reed | 2ddf7f3 | 2020-05-18 14:06:38 -0400 | [diff] [blame] | 87 | auto waterfall = [&](sk_sp<SkTypeface> tf) { |
| 88 | SkPaint paint; |
| 89 | paint.setAntiAlias(true); |
Mike Reed | b0210d2 | 2020-05-07 16:58:40 -0400 | [diff] [blame] | 90 | |
Mike Reed | 98bc22c | 2020-05-18 16:17:05 -0400 | [diff] [blame] | 91 | float spacing; |
Mike Reed | 2ddf7f3 | 2020-05-18 14:06:38 -0400 | [diff] [blame] | 92 | float x = 20, |
| 93 | y = 16; |
| 94 | for (float size = 9; size <= 100; size *= 1.25f) { |
Mike Reed | 98bc22c | 2020-05-18 16:17:05 -0400 | [diff] [blame] | 95 | auto blob = make_blob(tf, size, &spacing); |
| 96 | |
| 97 | // shared baseline |
| 98 | if (tf == nullptr) { |
| 99 | paint.setColor(0xFFDDDDDD); |
| 100 | canvas->drawRect({0, y, 810, y+1}, paint); |
| 101 | } |
Mike Reed | b0210d2 | 2020-05-07 16:58:40 -0400 | [diff] [blame] | 102 | |
Mike Reed | 2ddf7f3 | 2020-05-18 14:06:38 -0400 | [diff] [blame] | 103 | paint.setColor(0xFFCCCCCC); |
| 104 | paint.setStyle(SkPaint::kStroke_Style); |
| 105 | canvas->drawRect(blob->bounds().makeOffset(x, y), paint); |
| 106 | |
| 107 | paint.setStyle(SkPaint::kFill_Style); |
| 108 | paint.setColor(SK_ColorBLACK); |
| 109 | canvas->drawTextBlob(blob, x, y, paint); |
| 110 | |
Mike Reed | 98bc22c | 2020-05-18 16:17:05 -0400 | [diff] [blame] | 111 | y += SkScalarRoundToInt(spacing * 1.25f + 2); |
Mike Reed | 2ddf7f3 | 2020-05-18 14:06:38 -0400 | [diff] [blame] | 112 | } |
| 113 | }; |
| 114 | |
| 115 | waterfall(nullptr); |
| 116 | canvas->translate(400, 0); |
| 117 | waterfall(fTF); |
Mike Reed | b0210d2 | 2020-05-07 16:58:40 -0400 | [diff] [blame] | 118 | } |
| 119 | }; |
| 120 | DEF_GM(return new UserFontGM;) |