1 /* 2 * Copyright 2021 Google Inc. 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/SkColor.h" 11 #include "include/core/SkFont.h" 12 #include "include/core/SkFontStyle.h" 13 #include "include/core/SkFontTypes.h" 14 #include "include/core/SkPaint.h" 15 #include "include/core/SkPoint.h" 16 #include "include/core/SkRect.h" 17 #include "include/core/SkRefCnt.h" 18 #include "include/core/SkScalar.h" 19 #include "include/core/SkSize.h" 20 #include "include/core/SkString.h" 21 #include "include/core/SkTextBlob.h" 22 #include "include/core/SkTypeface.h" 23 #include "include/core/SkTypes.h" 24 #include "include/private/base/SkTDArray.h" 25 #include "include/private/chromium/Slug.h" 26 #include "tools/ToolUtils.h" 27 #include "tools/fonts/FontToolUtils.h" 28 29 #if defined(SK_GRAPHITE) 30 #include "include/gpu/graphite/ContextOptions.h" 31 #endif 32 33 #if defined(SK_GANESH) || defined(SK_GRAPHITE) 34 #include "include/gpu/ganesh/GrContextOptions.h" 35 36 class SlugGM : public skiagm::GM { 37 public: SlugGM(const char * txt)38 SlugGM(const char* txt) : fText(txt) {} 39 40 protected: modifyGrContextOptions(GrContextOptions * ctxOptions)41 void modifyGrContextOptions(GrContextOptions* ctxOptions) override { 42 ctxOptions->fSupportBilerpFromGlyphAtlas = true; 43 } 44 45 #if defined(SK_GRAPHITE) modifyGraphiteContextOptions(skgpu::graphite::ContextOptions * options) const46 void modifyGraphiteContextOptions(skgpu::graphite::ContextOptions* options) const override { 47 options->fSupportBilerpFromGlyphAtlas = true; 48 } 49 #endif 50 onOnceBeforeDraw()51 void onOnceBeforeDraw() override { 52 fTypeface = ToolUtils::CreatePortableTypeface("serif", SkFontStyle()); 53 SkFont font(fTypeface); 54 size_t txtLen = strlen(fText); 55 int glyphCount = font.countText(fText, txtLen, SkTextEncoding::kUTF8); 56 57 fGlyphs.append(glyphCount); 58 font.textToGlyphs(fText, txtLen, SkTextEncoding::kUTF8, fGlyphs.begin(), glyphCount); 59 } 60 getName() const61 SkString getName() const override { return SkString("slug"); } 62 getISize()63 SkISize getISize() override { return SkISize::Make(1000, 480); } 64 onDraw(SkCanvas * canvas)65 void onDraw(SkCanvas* canvas) override { 66 sk_sp<SkTextBlob> blob(this->makeBlob()); 67 SkPaint p; 68 p.setAntiAlias(true); 69 canvas->clipIRect(SkIRect::MakeSize(this->getISize()).makeInset(40, 50)); 70 canvas->scale(1.3f, 1.3f); 71 sk_sp<sktext::gpu::Slug> slug = sktext::gpu::Slug::ConvertBlob(canvas, *blob, {10, 10}, p); 72 if (slug == nullptr) { 73 return; 74 } 75 canvas->translate(0.5, 0.5); 76 canvas->translate(30, 30); 77 canvas->drawTextBlob(blob, 10, 10, p); 78 canvas->translate(370, 0); 79 slug->draw(canvas, p); 80 for (float scale = 1.5; scale < 4; scale += 0.5) { 81 canvas->translate(-370, 20 * scale); 82 canvas->save(); 83 canvas->scale(scale, scale); 84 canvas->rotate(5); 85 canvas->drawTextBlob(blob, 10, 10, p); 86 canvas->restore(); 87 canvas->translate(370, 0); 88 canvas->save(); 89 canvas->scale(scale, scale); 90 canvas->rotate(5); 91 92 slug->draw(canvas, p); 93 canvas->restore(); 94 } 95 } 96 97 private: makeBlob()98 sk_sp<SkTextBlob> makeBlob() { 99 SkTextBlobBuilder builder; 100 101 SkFont font; 102 font.setSubpixel(true); 103 font.setEdging(SkFont::Edging::kAntiAlias); 104 font.setTypeface(fTypeface); 105 font.setSize(16); 106 107 const SkTextBlobBuilder::RunBuffer& buf = builder.allocRun(font, fGlyphs.size(), 0, 0); 108 memcpy(buf.glyphs, fGlyphs.begin(), fGlyphs.size() * sizeof(uint16_t)); 109 return builder.make(); 110 } 111 112 SkTDArray<uint16_t> fGlyphs; 113 sk_sp<SkTypeface> fTypeface; 114 const char* fText; 115 using INHERITED = skiagm::GM; 116 }; 117 118 DEF_GM(return new SlugGM("hamburgefons");) 119 #endif 120