| /* |
| * 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 "gm/gm.h" |
| #include "include/core/SkBitmap.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkFont.h" |
| #include "include/core/SkFontArguments.h" |
| #include "include/core/SkFontMgr.h" |
| #include "include/core/SkFontTypes.h" |
| #include "include/core/SkImageInfo.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPathEffect.h" |
| #include "include/core/SkPoint.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkStream.h" |
| #include "include/core/SkTextBlob.h" |
| #include "include/core/SkTypeface.h" |
| #include "include/core/SkTypes.h" |
| #include "include/effects/SkDashPathEffect.h" |
| #include "tools/Resources.h" |
| #include "tools/ToolUtils.h" |
| #include "tools/fonts/FontToolUtils.h" |
| |
| static void test_nulldev(SkCanvas* canvas) { |
| SkBitmap bm; |
| bm.setInfo(SkImageInfo::MakeN32Premul(30, 30)); |
| // notice: no pixels mom! be sure we don't crash |
| // https://code.google.com/p/chromium/issues/detail?id=352616 |
| SkCanvas c(bm); |
| |
| SkBitmap src; |
| src.allocN32Pixels(10, 10); |
| src.eraseColor(SK_ColorRED); |
| |
| // ensure we don't crash |
| c.writePixels(src, 0, 0); |
| } |
| |
| static void draw_text_stroked(SkCanvas* canvas, const SkPaint& paint, const SkFont& font, |
| SkScalar strokeWidth) { |
| SkPaint p(paint); |
| SkPoint loc = { 20, 435 }; |
| |
| if (strokeWidth > 0) { |
| p.setStyle(SkPaint::kFill_Style); |
| canvas->drawSimpleText("P", 1, SkTextEncoding::kUTF8, loc.fX, loc.fY - 225, font, p); |
| canvas->drawTextBlob(SkTextBlob::MakeFromPosText("P", 1, &loc, font), 0, 0, p); |
| } |
| |
| p.setColor(SK_ColorRED); |
| p.setStyle(SkPaint::kStroke_Style); |
| p.setStrokeWidth(strokeWidth); |
| |
| canvas->drawSimpleText("P", 1, SkTextEncoding::kUTF8, loc.fX, loc.fY - 225, font, p); |
| canvas->drawTextBlob(SkTextBlob::MakeFromPosText("P", 1, &loc, font), 0, 0, p); |
| } |
| |
| static void draw_text_set(SkCanvas* canvas, const SkPaint& paint, const SkFont& font) { |
| SkAutoCanvasRestore acr(canvas, true); |
| |
| draw_text_stroked(canvas, paint, font, 10); |
| |
| canvas->translate(200, 0); |
| draw_text_stroked(canvas, paint, font, 0); |
| |
| const SkScalar intervals[] = { 20, 10, 5, 10 }; |
| const SkScalar phase = 0; |
| |
| canvas->translate(200, 0); |
| SkPaint p(paint); |
| p.setPathEffect(SkDashPathEffect::Make(intervals, std::size(intervals), phase)); |
| draw_text_stroked(canvas, p, font, 10); |
| } |
| |
| namespace { |
| enum { |
| kBelowThreshold_TextSize = 255, |
| kAboveThreshold_TextSize = 257 |
| }; |
| } // namespace |
| |
| DEF_SIMPLE_GM(stroketext, canvas, 1200, 480) { |
| if (true) { test_nulldev(canvas); } |
| |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| |
| SkFont font(ToolUtils::DefaultPortableTypeface(), kBelowThreshold_TextSize); |
| draw_text_set(canvas, paint, font); |
| |
| canvas->translate(600, 0); |
| font.setSize(kAboveThreshold_TextSize); |
| draw_text_set(canvas, paint, font); |
| } |
| |
| DEF_SIMPLE_GM_CAN_FAIL(stroketext_native, canvas, msg, 650, 420) { |
| sk_sp<SkTypeface> ttf = ToolUtils::CreateTypefaceFromResource("fonts/Stroking.ttf"); |
| sk_sp<SkTypeface> otf = ToolUtils::CreateTypefaceFromResource("fonts/Stroking.otf"); |
| |
| sk_sp<SkTypeface> overlap = []() -> sk_sp<SkTypeface>{ |
| std::unique_ptr<SkStreamAsset> variableStream(GetResourceAsStream("fonts/Variable.ttf")); |
| if (!variableStream) { |
| return nullptr; |
| } |
| const SkFontArguments::VariationPosition::Coordinate position[] = { |
| { SkSetFourByteTag('w','g','h','t'), 721.0f }, |
| }; |
| SkFontArguments params; |
| params.setVariationDesignPosition({position, std::size(position)}); |
| return ToolUtils::TestFontMgr()->makeFromStream(std::move(variableStream), params); |
| }(); |
| |
| if (!ttf && !otf && !overlap) { |
| msg->append("No support for ttf or otf."); |
| return skiagm::DrawResult::kSkip; |
| } |
| |
| SkPaint p; |
| p.setAntiAlias(true); |
| p.setStyle(SkPaint::kStroke_Style); |
| p.setStrokeWidth(10); |
| p.setStrokeCap(SkPaint::kRound_Cap); |
| p.setStrokeJoin(SkPaint::kRound_Join); |
| p.setARGB(0xff, 0xbb, 0x00, 0x00); |
| |
| if (ttf) { |
| /* Stroking.ttf is structured like: |
| nothing U+25CB ○ (nothing inside) |
| something U+25C9 ◉ (a tiny thing inside) |
| - off (point off / empty quad with implicit end) (before U+207B ⁻ / after U+208B ₋) |
| + on (point on / empty line) (before U+207A ⁺ / after U+208A ₊) |
| 0 off off (two implicit quads) (before U+2070 ⁰ / after U+2080 ₀) |
| 1 off on (quad with implicit close around) (before U+00B9 ¹ / after U+2081 ₁) |
| 2 on off (quad with implicit close) (before U+00B2 ² / after U+2082 ₂) |
| 3 on on (empty line) (before U+00B3 ³ / after U+2083 ₃) |
| */ |
| SkFont font(ttf, 100); |
| canvas->drawString("○◉ ⁻₋⁺₊", 10, 100, font, p); |
| canvas->drawString("⁰₀¹₁²₂³₃", 10, 200, font, p); |
| } |
| |
| if (otf) { |
| /* Stroking.otf is structured like: |
| nothing U+25CB ○ |
| something U+25C9 ◉ |
| 0 moveto, moveto (before U+2070 ⁰) (nothing there, FreeType ignores these) |
| 1 moveto, empty line, moveto (before U+00B9 ¹) (degenerate lineto) |
| 3 moveto, empty cubic, moveto (before U+00B3 ³) (degenerate cubicto) |
| f moveto, empty flex, moveto (before U+1DA0 ᶠ) (degenerate flex) |
| */ |
| SkFont font(otf, 100); |
| canvas->drawString("○◉ ⁰¹³ᶠ", 10, 300, font, p); |
| } |
| |
| if (overlap) { |
| /* Variable.ttf is structured like: |
| U+74 t (glyf outline has overlap flag) |
| U+167 ŧ (glyf outline does not have overlap flag) |
| */ |
| SkFont font(overlap, 100); |
| p.setStrokeWidth(1); |
| canvas->drawString("tŧ", 10, 400, font, p); |
| } |
| |
| return skiagm::DrawResult::kOk; |
| } |