1 /* 2 * Copyright 2015 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/SkColorSpace.h" 12 #include "include/core/SkFont.h" 13 #include "include/core/SkFontStyle.h" 14 #include "include/core/SkFontTypes.h" 15 #include "include/core/SkImageInfo.h" 16 #include "include/core/SkPaint.h" 17 #include "include/core/SkRect.h" 18 #include "include/core/SkRefCnt.h" 19 #include "include/core/SkScalar.h" 20 #include "include/core/SkSize.h" 21 #include "include/core/SkString.h" 22 #include "include/core/SkSurface.h" 23 #include "include/core/SkSurfaceProps.h" 24 #include "include/core/SkTextBlob.h" 25 #include "include/core/SkTypeface.h" 26 #include "include/gpu/GrDirectContext.h" 27 #include "include/gpu/GrRecordingContext.h" 28 #include "tools/ToolUtils.h" 29 #include "tools/fonts/RandomScalerContext.h" 30 31 #include <string.h> 32 #include <utility> 33 34 class GrSurfaceDrawContext; 35 36 namespace skiagm { 37 class TextBlobRandomFont : public GpuGM { 38 public: 39 // This gm tests that textblobs can be translated and scaled with a font that returns random 40 // but deterministic masks TextBlobRandomFont()41 TextBlobRandomFont() { } 42 43 protected: onOnceBeforeDraw()44 void onOnceBeforeDraw() override { 45 SkTextBlobBuilder builder; 46 47 const char* text = "The quick brown fox jumps over the lazy dog."; 48 49 SkPaint paint; 50 paint.setAntiAlias(true); 51 paint.setColor(SK_ColorMAGENTA); 52 53 // make textbloben 54 SkFont font; 55 font.setSize(32); 56 font.setEdging(SkFont::Edging::kSubpixelAntiAlias); 57 58 // Setup our random scaler context 59 auto typeface = ToolUtils::create_portable_typeface("sans-serif", SkFontStyle::Bold()); 60 if (!typeface) { 61 typeface = SkTypeface::MakeDefault(); 62 } 63 font.setTypeface(sk_make_sp<SkRandomTypeface>(std::move(typeface), paint, false)); 64 65 SkScalar y = 0; 66 SkRect bounds; 67 font.measureText(text, strlen(text), SkTextEncoding::kUTF8, &bounds); 68 y -= bounds.fTop; 69 ToolUtils::add_to_text_blob(&builder, text, font, 0, y); 70 y += bounds.fBottom; 71 72 // A8 73 const char* bigtext1 = "The quick brown fox"; 74 const char* bigtext2 = "jumps over the lazy dog."; 75 font.setSize(160); 76 font.setSubpixel(false); 77 font.setEdging(SkFont::Edging::kAntiAlias); 78 font.measureText(bigtext1, strlen(bigtext1), SkTextEncoding::kUTF8, &bounds); 79 y -= bounds.fTop; 80 ToolUtils::add_to_text_blob(&builder, bigtext1, font, 0, y); 81 y += bounds.fBottom; 82 83 font.measureText(bigtext2, strlen(bigtext2), SkTextEncoding::kUTF8, &bounds); 84 y -= bounds.fTop; 85 ToolUtils::add_to_text_blob(&builder, bigtext2, font, 0, y); 86 y += bounds.fBottom; 87 88 // color emoji 89 if (sk_sp<SkTypeface> origEmoji = ToolUtils::emoji_typeface()) { 90 font.setTypeface(sk_make_sp<SkRandomTypeface>(origEmoji, paint, false)); 91 const char* emojiText = ToolUtils::emoji_sample_text(); 92 font.measureText(emojiText, strlen(emojiText), SkTextEncoding::kUTF8, &bounds); 93 y -= bounds.fTop; 94 ToolUtils::add_to_text_blob(&builder, emojiText, font, 0, y); 95 y += bounds.fBottom; 96 } 97 98 // build 99 fBlob = builder.make(); 100 } 101 onShortName()102 SkString onShortName() override { 103 return SkString("textblobrandomfont"); 104 } 105 onISize()106 SkISize onISize() override { 107 return SkISize::Make(kWidth, kHeight); 108 } 109 onDraw(GrRecordingContext * context,GrSurfaceDrawContext *,SkCanvas * canvas,SkString * errorMsg)110 DrawResult onDraw(GrRecordingContext* context, 111 GrSurfaceDrawContext*, SkCanvas* canvas, 112 SkString* errorMsg) override { 113 // This GM exists to test a specific feature of the GPU backend. 114 // This GM uses ToolUtils::makeSurface which doesn't work well with vias. 115 // This GM uses SkRandomTypeface which doesn't work well with serialization. 116 canvas->drawColor(SK_ColorWHITE); 117 118 SkImageInfo info = SkImageInfo::Make(kWidth, kHeight, canvas->imageInfo().colorType(), 119 kPremul_SkAlphaType, 120 canvas->imageInfo().refColorSpace()); 121 SkSurfaceProps props(0, kUnknown_SkPixelGeometry); 122 auto surface(ToolUtils::makeSurface(canvas, info, &props)); 123 if (!surface) { 124 *errorMsg = "This test requires a surface"; 125 return DrawResult::kFail; 126 } 127 128 SkPaint paint; 129 paint.setAntiAlias(true); 130 131 SkCanvas* surfaceCanvas = surface->getCanvas(); 132 133 SkScalar stride = SkScalarCeilToScalar(fBlob->bounds().height()); 134 SkScalar yOffset = 5; 135 136 canvas->save(); 137 // Originally we would alternate between rotating and not to force blob regeneration, 138 // but that code seems to have rotted. Keeping the rotate to match the old GM as 139 // much as possible, and it seems like a reasonable stress test for transformed 140 // color emoji. 141 canvas->rotate(-0.05f); 142 canvas->drawTextBlob(fBlob, 10, yOffset, paint); 143 yOffset += stride; 144 canvas->restore(); 145 146 // Rotate in the surface canvas, not the final canvas, to avoid aliasing 147 surfaceCanvas->rotate(-0.05f); 148 surfaceCanvas->drawTextBlob(fBlob, 10, yOffset, paint); 149 surface->draw(canvas, 0, 0); 150 yOffset += stride; 151 152 if (auto direct = context->asDirectContext()) { 153 // free gpu resources and verify 154 direct->freeGpuResources(); 155 } 156 157 canvas->rotate(-0.05f); 158 canvas->drawTextBlob(fBlob, 10, yOffset, paint); 159 yOffset += stride; 160 return DrawResult::kOk; 161 } 162 163 private: 164 sk_sp<SkTextBlob> fBlob; 165 166 static constexpr int kWidth = 2000; 167 static constexpr int kHeight = 1600; 168 169 using INHERITED = GM; 170 }; 171 172 ////////////////////////////////////////////////////////////////////////////// 173 174 DEF_GM(return new TextBlobRandomFont;) 175 } // namespace skiagm 176