1 /* 2 * Copyright 2013 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 10 #include "Resources.h" 11 #include "SkBlurImageFilter.h" 12 #include "SkColorFilterImageFilter.h" 13 #include "SkColorMatrixFilter.h" 14 #include "SkCanvas.h" 15 #include "SkGradientShader.h" 16 #include "SkStream.h" 17 #include "SkTypeface.h" 18 19 /* 20 * Spits out a dummy gradient to test blur with shader on paint 21 */ 22 static SkShader* MakeLinear() { 23 static const SkPoint kPts[] = { { 0, 0 }, { 32, 32 } }; 24 static const SkScalar kPos[] = { 0, SK_Scalar1/2, SK_Scalar1 }; 25 static const SkColor kColors[] = {0x80F00080, 0xF0F08000, 0x800080F0 }; 26 return SkGradientShader::CreateLinear(kPts, kColors, kPos, 27 SK_ARRAY_COUNT(kColors), SkShader::kClamp_TileMode); 28 } 29 30 static SkImageFilter* make_grayscale(SkImageFilter* input = NULL) { 31 SkScalar matrix[20]; 32 memset(matrix, 0, 20 * sizeof(SkScalar)); 33 matrix[0] = matrix[5] = matrix[10] = 0.2126f; 34 matrix[1] = matrix[6] = matrix[11] = 0.7152f; 35 matrix[2] = matrix[7] = matrix[12] = 0.0722f; 36 matrix[18] = 1.0f; 37 SkAutoTUnref<SkColorFilter> filter(SkColorMatrixFilter::Create(matrix)); 38 return SkColorFilterImageFilter::Create(filter, input); 39 } 40 41 static SkImageFilter* make_blur(float amount, SkImageFilter* input = NULL) { 42 return SkBlurImageFilter::Create(amount, amount, input); 43 } 44 45 namespace skiagm { 46 47 class ColorEmojiGM : public GM { 48 public: 49 ColorEmojiGM() : fCBDT_CBLC_Typeface(NULL), fSBIX_Typeface(NULL) { } 50 51 protected: 52 struct EmojiFont { 53 SkTypeface* typeface; 54 const char* text; 55 } emojiFonts[2]; 56 virtual void onOnceBeforeDraw() override { 57 fCBDT_CBLC_Typeface.reset(GetResourceAsTypeface("/fonts/Funkster.ttf")); 58 emojiFonts[0].typeface = fCBDT_CBLC_Typeface; 59 emojiFonts[0].text = "hamburgerfons"; 60 61 fSBIX_Typeface.reset(SkTypeface::CreateFromName("Apple Color Emoji", SkTypeface::kNormal)); 62 emojiFonts[1].typeface = fSBIX_Typeface; 63 emojiFonts[1].text = "\xF0\x9F\x92\xB0" "\xF0\x9F\x8F\xA1" "\xF0\x9F\x8E\x85" // 64 "\xF0\x9F\x8D\xAA" "\xF0\x9F\x8D\x95" "\xF0\x9F\x9A\x80" // 65 "\xF0\x9F\x9A\xBB" "\xF0\x9F\x92\xA9" "\xF0\x9F\x93\xB7" // 66 "\xF0\x9F\x93\xA6" // 67 "\xF0\x9F\x87\xBA" "\xF0\x9F\x87\xB8" "\xF0\x9F\x87\xA6"; // 68 } 69 70 SkString onShortName() override { 71 return SkString("coloremoji"); 72 } 73 74 SkISize onISize() override { 75 return SkISize::Make(650, 900); 76 } 77 78 void onDraw(SkCanvas* canvas) override { 79 80 canvas->drawColor(SK_ColorGRAY); 81 82 for (size_t i = 0; i < SK_ARRAY_COUNT(emojiFonts); ++i) { 83 SkPaint paint; 84 paint.setTypeface(emojiFonts[i].typeface); 85 const char* text = emojiFonts[i].text; 86 87 // draw text at different point sizes 88 const int textSize[] = { 10, 30, 50, }; 89 const int textYOffset[] = { 10, 40, 100, }; 90 SkASSERT(sizeof(textSize) == sizeof(textYOffset)); 91 size_t y_offset = 0; 92 for (size_t y = 0; y < sizeof(textSize) / sizeof(int); y++) { 93 paint.setTextSize(SkIntToScalar(textSize[y])); 94 canvas->drawText(text, strlen(text), 10, SkIntToScalar(textYOffset[y]), paint); 95 y_offset += textYOffset[y]; 96 } 97 98 // draw with shaders and image filters 99 for (int makeLinear = 0; makeLinear < 2; makeLinear++) { 100 for (int makeBlur = 0; makeBlur < 2; makeBlur++) { 101 for (int makeGray = 0; makeGray < 2; makeGray++) { 102 SkPaint shaderPaint; 103 shaderPaint.setTypeface(paint.getTypeface()); 104 if (SkToBool(makeLinear)) { 105 shaderPaint.setShader(MakeLinear())->unref(); 106 } 107 108 if (SkToBool(makeBlur) && SkToBool(makeGray)) { 109 SkAutoTUnref<SkImageFilter> grayScale(make_grayscale(NULL)); 110 SkAutoTUnref<SkImageFilter> blur(make_blur(3.0f, grayScale)); 111 shaderPaint.setImageFilter(blur); 112 } else if (SkToBool(makeBlur)) { 113 SkAutoTUnref<SkImageFilter> blur(make_blur(3.0f, NULL)); 114 shaderPaint.setImageFilter(blur); 115 } else if (SkToBool(makeGray)) { 116 SkAutoTUnref<SkImageFilter> grayScale(make_grayscale(NULL)); 117 shaderPaint.setImageFilter(grayScale); 118 } 119 shaderPaint.setTextSize(30); 120 canvas->drawText(text, strlen(text), 380, SkIntToScalar(y_offset), 121 shaderPaint); 122 y_offset += 32; 123 } 124 } 125 } 126 127 // setup work needed to draw text with different clips 128 canvas->translate(10, 160); 129 paint.setTextSize(40); 130 131 // compute the bounds of the text 132 SkRect bounds; 133 paint.measureText(text, strlen(text), &bounds); 134 135 const SkScalar boundsHalfWidth = bounds.width() * SK_ScalarHalf; 136 const SkScalar boundsHalfHeight = bounds.height() * SK_ScalarHalf; 137 const SkScalar boundsQuarterWidth = boundsHalfWidth * SK_ScalarHalf; 138 const SkScalar boundsQuarterHeight = boundsHalfHeight * SK_ScalarHalf; 139 140 SkRect upperLeftClip = SkRect::MakeXYWH(bounds.left(), bounds.top(), 141 boundsHalfWidth, boundsHalfHeight); 142 SkRect lowerRightClip = SkRect::MakeXYWH(bounds.centerX(), bounds.centerY(), 143 boundsHalfWidth, boundsHalfHeight); 144 SkRect interiorClip = bounds; 145 interiorClip.inset(boundsQuarterWidth, boundsQuarterHeight); 146 147 const SkRect clipRects[] = { bounds, upperLeftClip, lowerRightClip, interiorClip }; 148 149 SkPaint clipHairline; 150 clipHairline.setColor(SK_ColorWHITE); 151 clipHairline.setStyle(SkPaint::kStroke_Style); 152 153 for (size_t x = 0; x < sizeof(clipRects) / sizeof(SkRect); ++x) { 154 canvas->save(); 155 canvas->drawRect(clipRects[x], clipHairline); 156 paint.setAlpha(0x20); 157 canvas->drawText(text, strlen(text), 0, 0, paint); 158 canvas->clipRect(clipRects[x]); 159 paint.setAlpha(0xFF); 160 canvas->drawText(text, strlen(text), 0, 0, paint); 161 canvas->restore(); 162 canvas->translate(0, bounds.height() + SkIntToScalar(25)); 163 } 164 } 165 } 166 167 private: 168 SkAutoTUnref<SkTypeface> fCBDT_CBLC_Typeface; 169 SkAutoTUnref<SkTypeface> fSBIX_Typeface; 170 171 typedef GM INHERITED; 172 }; 173 174 ////////////////////////////////////////////////////////////////////////////// 175 176 static GM* MyFactory(void*) { return new ColorEmojiGM; } 177 static GMRegistry reg(MyFactory); 178 179 } 180
