1/* 2 * Copyright 2014 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.h" 9#include "SkCanvas.h" 10#include "SkDashPathEffect.h" 11 12static void test_nulldev(SkCanvas* canvas) { 13 SkBitmap bm; 14 bm.setInfo(SkImageInfo::MakeN32Premul(30, 30)); 15 // notice: no pixels mom! be sure we don't crash 16 // https://code.google.com/p/chromium/issues/detail?id=352616 17 SkCanvas c(bm); 18 19 SkBitmap src; 20 src.allocN32Pixels(10, 10); 21 src.eraseColor(SK_ColorRED); 22 23 // ensure we don't crash 24 c.writePixels(src, 0, 0); 25} 26 27static void draw_text_stroked(SkCanvas* canvas, const SkPaint& paint, SkScalar strokeWidth) { 28 SkPaint p(paint); 29 SkPoint loc = { 20, 435 }; 30 31 if (strokeWidth > 0) { 32 p.setStyle(SkPaint::kFill_Style); 33 canvas->drawText("P", 1, loc.fX, loc.fY - 225, p); 34 canvas->drawPosText("P", 1, &loc, p); 35 } 36 37 p.setColor(SK_ColorRED); 38 p.setStyle(SkPaint::kStroke_Style); 39 p.setStrokeWidth(strokeWidth); 40 41 canvas->drawText("P", 1, loc.fX, loc.fY - 225, p); 42 canvas->drawPosText("P", 1, &loc, p); 43} 44 45static void draw_text_set(SkCanvas* canvas, const SkPaint& paint) { 46 SkAutoCanvasRestore acr(canvas, true); 47 48 draw_text_stroked(canvas, paint, 10); 49 50 canvas->translate(200, 0); 51 draw_text_stroked(canvas, paint, 0); 52 53 const SkScalar intervals[] = { 20, 10, 5, 10 }; 54 const SkScalar phase = 0; 55 56 canvas->translate(200, 0); 57 SkPaint p(paint); 58 p.setPathEffect(SkDashPathEffect::Create(intervals, SK_ARRAY_COUNT(intervals), phase))->unref(); 59 draw_text_stroked(canvas, p, 10); 60} 61 62class StrokeTextGM : public skiagm::GM { 63 // Skia has a threshold above which it draws text via paths instead of using scalercontext 64 // and caching the glyph. This GM wants to ensure that we draw stroking correctly on both 65 // sides of this threshold. 66 enum { 67 kBelowThreshold_TextSize = 255, 68 kAboveThreshold_TextSize = 257 69 }; 70public: 71 StrokeTextGM() {} 72 73protected: 74 75 SkString onShortName() override { 76 return SkString("stroketext"); 77 } 78 79 SkISize onISize() override { 80 return SkISize::Make(1200, 480); 81 } 82 83 void onDraw(SkCanvas* canvas) override { 84 if (true) { test_nulldev(canvas); } 85 SkPaint paint; 86 paint.setAntiAlias(true); 87 sk_tool_utils::set_portable_typeface(&paint); 88 89 paint.setTextSize(kBelowThreshold_TextSize); 90 draw_text_set(canvas, paint); 91 92 canvas->translate(600, 0); 93 paint.setTextSize(kAboveThreshold_TextSize); 94 draw_text_set(canvas, paint); 95 } 96 97private: 98 typedef skiagm::GM INHERITED; 99}; 100 101DEF_GM( return SkNEW(StrokeTextGM); ) 102