1/* 2 * Copyright 2011 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 "sk_tool_utils.h" 10#include "SkCanvas.h" 11#include "SkGradientShader.h" 12 13namespace skiagm { 14 15static void makebm(SkBitmap* bm, int w, int h) { 16 bm->allocN32Pixels(w, h); 17 bm->eraseColor(SK_ColorTRANSPARENT); 18 19 SkCanvas canvas(*bm); 20 SkScalar s = SkIntToScalar(SkMin32(w, h)); 21 const SkPoint kPts0[] = { { 0, 0 }, { s, s } }; 22 const SkPoint kPts1[] = { { s/2, 0 }, { s/2, s } }; 23 const SkScalar kPos[] = { 0, SK_Scalar1/2, SK_Scalar1 }; 24 const SkColor kColors0[] = {0x80F00080, 0xF0F08000, 0x800080F0 }; 25 const SkColor kColors1[] = {0xF08000F0, 0x8080F000, 0xF000F080 }; 26 27 28 SkPaint paint; 29 30 paint.setShader(SkGradientShader::MakeLinear(kPts0, kColors0, kPos, 31 SK_ARRAY_COUNT(kColors0), SkShader::kClamp_TileMode)); 32 canvas.drawPaint(paint); 33 paint.setShader(SkGradientShader::MakeLinear(kPts1, kColors1, kPos, 34 SK_ARRAY_COUNT(kColors1), SkShader::kClamp_TileMode)); 35 canvas.drawPaint(paint); 36} 37 38/////////////////////////////////////////////////////////////////////////////// 39 40struct LabeledMatrix { 41 SkMatrix fMatrix; 42 const char* fLabel; 43}; 44 45constexpr char kText[] = "B"; 46constexpr int kTextLen = SK_ARRAY_COUNT(kText) - 1; 47constexpr int kPointSize = 300; 48 49class ShaderText3GM : public GM { 50public: 51 ShaderText3GM() { 52 this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD)); 53 } 54 55protected: 56 57 SkString onShortName() override { 58 return SkString("shadertext3"); 59 } 60 61 SkISize onISize() override{ return SkISize::Make(820, 930); } 62 63 void onOnceBeforeDraw() override { 64 makebm(&fBmp, kPointSize / 4, kPointSize / 4); 65 } 66 67 void onDraw(SkCanvas* canvas) override { 68 69 SkPaint bmpPaint; 70 bmpPaint.setAntiAlias(true); 71 bmpPaint.setFilterQuality(kLow_SkFilterQuality); 72 bmpPaint.setAlpha(0x80); 73 canvas->drawBitmap(fBmp, 5.f, 5.f, &bmpPaint); 74 75 SkPaint outlinePaint; 76 outlinePaint.setAntiAlias(true); 77 sk_tool_utils::set_portable_typeface(&outlinePaint); 78 outlinePaint.setTextSize(SkIntToScalar(kPointSize)); 79 outlinePaint.setStyle(SkPaint::kStroke_Style); 80 outlinePaint.setStrokeWidth(0.f); 81 82 canvas->translate(15.f, 15.f); 83 84 // draw glyphs scaled up 85 canvas->scale(2.f, 2.f); 86 87 constexpr SkShader::TileMode kTileModes[] = { 88 SkShader::kRepeat_TileMode, 89 SkShader::kMirror_TileMode, 90 }; 91 92 // position the baseline of the first run 93 canvas->translate(0.f, 0.75f * kPointSize); 94 95 canvas->save(); 96 int i = 0; 97 for (size_t tm0 = 0; tm0 < SK_ARRAY_COUNT(kTileModes); ++tm0) { 98 for (size_t tm1 = 0; tm1 < SK_ARRAY_COUNT(kTileModes); ++tm1) { 99 SkMatrix localM; 100 localM.setTranslate(5.f, 5.f); 101 localM.postRotate(20); 102 localM.postScale(1.15f, .85f); 103 104 SkPaint fillPaint; 105 fillPaint.setAntiAlias(true); 106 sk_tool_utils::set_portable_typeface(&fillPaint); 107 fillPaint.setTextSize(SkIntToScalar(kPointSize)); 108 fillPaint.setFilterQuality(kLow_SkFilterQuality); 109 fillPaint.setShader(SkShader::MakeBitmapShader(fBmp, kTileModes[tm0], 110 kTileModes[tm1], &localM)); 111 112 canvas->drawText(kText, kTextLen, 0, 0, fillPaint); 113 canvas->drawText(kText, kTextLen, 0, 0, outlinePaint); 114 SkScalar w = fillPaint.measureText(kText, kTextLen); 115 canvas->translate(w + 10.f, 0.f); 116 ++i; 117 if (!(i % 2)) { 118 canvas->restore(); 119 canvas->translate(0, 0.75f * kPointSize); 120 canvas->save(); 121 } 122 } 123 } 124 canvas->restore(); 125 } 126 127private: 128 SkBitmap fBmp; 129 typedef GM INHERITED; 130}; 131 132/////////////////////////////////////////////////////////////////////////////// 133 134static GM* MyFactory(void*) { return new ShaderText3GM; } 135static GMRegistry reg(MyFactory); 136} 137