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 #include "gm.h" 8 #include "SkCanvas.h" 9 #include "SkGradientShader.h" 10 11 namespace skiagm { 12 13 static void makebm(SkBitmap* bm, int w, int h) { 14 bm->allocN32Pixels(w, h); 15 bm->eraseColor(SK_ColorTRANSPARENT); 16 17 SkCanvas canvas(*bm); 18 SkScalar s = SkIntToScalar(SkMin32(w, h)); 19 static const SkPoint kPts0[] = { { 0, 0 }, { s, s } }; 20 static const SkPoint kPts1[] = { { s, 0 }, { 0, s } }; 21 static const SkScalar kPos[] = { 0, SK_Scalar1/2, SK_Scalar1 }; 22 static const SkColor kColors0[] = {0x40FF00FF, 0xF0FFFF00, 0x4000FFFF }; 23 static const SkColor kColors1[] = {0xF0FF00FF, 0x80FFFF00, 0xF000FFFF }; 24 25 26 SkPaint paint; 27 28 paint.setShader(SkGradientShader::CreateLinear(kPts0, kColors0, kPos, 29 SK_ARRAY_COUNT(kColors0), SkShader::kClamp_TileMode))->unref(); 30 canvas.drawPaint(paint); 31 paint.setShader(SkGradientShader::CreateLinear(kPts1, kColors1, kPos, 32 SK_ARRAY_COUNT(kColors1), SkShader::kClamp_TileMode))->unref(); 33 canvas.drawPaint(paint); 34 } 35 36 /////////////////////////////////////////////////////////////////////////////// 37 38 struct LabeledMatrix { 39 SkMatrix fMatrix; 40 const char* fLabel; 41 }; 42 43 class ShaderText2GM : public GM { 44 public: 45 ShaderText2GM() { 46 this->setBGColor(0xFFDDDDDD); 47 } 48 49 protected: 50 51 SkString onShortName() { 52 return SkString("shadertext2"); 53 } 54 55 SkISize onISize() { return SkISize::Make(1800, 900); } 56 57 virtual void onDraw(SkCanvas* canvas) { 58 static const char kText[] = "SKIA"; 59 static const int kTextLen = SK_ARRAY_COUNT(kText) - 1; 60 static const int kPointSize = 55; 61 62 SkTDArray<LabeledMatrix> matrices; 63 matrices.append()->fMatrix.reset(); 64 matrices.top().fLabel = "Identity"; 65 matrices.append()->fMatrix.setScale(1.2f, 0.8f); 66 matrices.top().fLabel = "Scale"; 67 matrices.append()->fMatrix.setRotate(10.f); 68 matrices.top().fLabel = "Rotate"; 69 matrices.append()->fMatrix.reset(); 70 matrices.top().fMatrix.setPerspX(-0.0015f); 71 matrices.top().fMatrix.setPerspY(+0.0015f); 72 matrices.top().fLabel = "Persp"; 73 74 SkTDArray<LabeledMatrix> localMatrices; 75 localMatrices.append()->fMatrix.reset(); 76 localMatrices.top().fLabel = "Identity"; 77 localMatrices.append()->fMatrix.setScale(2.5f, 0.2f); 78 localMatrices.top().fLabel = "Scale"; 79 localMatrices.append()->fMatrix.setRotate(45.f); 80 localMatrices.top().fLabel = "Rotate"; 81 localMatrices.append()->fMatrix.reset(); 82 localMatrices.top().fMatrix.setPerspX(-0.007f); 83 localMatrices.top().fMatrix.setPerspY(+0.008f); 84 localMatrices.top().fLabel = "Persp"; 85 86 static SkBitmap bmp; 87 if (bmp.isNull()) { 88 makebm(&bmp, kPointSize / 2, kPointSize / 2); 89 } 90 91 SkPaint fillPaint; 92 fillPaint.setAntiAlias(true); 93 sk_tool_utils::set_portable_typeface(&fillPaint); 94 fillPaint.setTextSize(SkIntToScalar(kPointSize)); 95 fillPaint.setFilterLevel(SkPaint::kLow_FilterLevel); 96 97 SkPaint outlinePaint; 98 outlinePaint.setAntiAlias(true); 99 sk_tool_utils::set_portable_typeface(&outlinePaint); 100 outlinePaint.setTextSize(SkIntToScalar(kPointSize)); 101 outlinePaint.setStyle(SkPaint::kStroke_Style); 102 outlinePaint.setStrokeWidth(0.f); 103 104 SkScalar w = fillPaint.measureText(kText, kTextLen); 105 static SkScalar kPadY = 0.5f * kPointSize; 106 static SkScalar kPadX = 1.5f * kPointSize; 107 108 SkPaint strokePaint(fillPaint); 109 strokePaint.setStyle(SkPaint::kStroke_Style); 110 strokePaint.setStrokeWidth(kPointSize * 0.1f); 111 112 SkPaint labelPaint; 113 labelPaint.setColor(0xff000000); 114 labelPaint.setAntiAlias(true); 115 sk_tool_utils::set_portable_typeface(&labelPaint); 116 labelPaint.setTextSize(12.f); 117 118 canvas->translate(15.f, 15.f); 119 canvas->drawBitmap(bmp, 0, 0); 120 canvas->translate(0, bmp.height() + labelPaint.getTextSize() + 15.f); 121 122 static const char kLabelLabel[] = "localM / canvasM"; 123 canvas->drawText(kLabelLabel, strlen(kLabelLabel), 0, 0, labelPaint); 124 canvas->translate(0, 15.f); 125 126 canvas->save(); 127 SkScalar maxLabelW = 0; 128 canvas->translate(0, kPadY / 2 + kPointSize); 129 for (int lm = 0; lm < localMatrices.count(); ++lm) { 130 canvas->drawText(matrices[lm].fLabel, strlen(matrices[lm].fLabel), 131 0, labelPaint.getTextSize() - 1, labelPaint); 132 SkScalar labelW = labelPaint.measureText(matrices[lm].fLabel, 133 strlen(matrices[lm].fLabel)); 134 maxLabelW = SkMaxScalar(maxLabelW, labelW); 135 canvas->translate(0.f, 2 * kPointSize + 2.5f * kPadY); 136 } 137 canvas->restore(); 138 139 canvas->translate(maxLabelW + kPadX / 2.f, 0.f); 140 141 for (int s = 0; s < 2; ++s) { 142 SkPaint& paint = s ? strokePaint : fillPaint; 143 144 SkScalar columnH = 0; 145 for (int m = 0; m < matrices.count(); ++m) { 146 columnH = 0; 147 canvas->save(); 148 canvas->drawText(matrices[m].fLabel, strlen(matrices[m].fLabel), 149 0, labelPaint.getTextSize() - 1, labelPaint); 150 canvas->translate(0, kPadY / 2 + kPointSize); 151 columnH += kPadY / 2 + kPointSize; 152 for (int lm = 0; lm < localMatrices.count(); ++lm) { 153 paint.setShader( 154 SkShader::CreateBitmapShader(bmp, 155 SkShader::kMirror_TileMode, 156 SkShader::kRepeat_TileMode, 157 &localMatrices[lm].fMatrix))->unref(); 158 159 canvas->save(); 160 canvas->concat(matrices[m].fMatrix); 161 canvas->drawText(kText, kTextLen, 0, 0, paint); 162 canvas->drawText(kText, kTextLen, 0, 0, outlinePaint); 163 canvas->restore(); 164 165 SkPath path; 166 path.arcTo(SkRect::MakeXYWH(-0.1f * w, 0.f, 167 1.2f * w, 2.f * kPointSize), 168 225.f, 359.f, 169 false); 170 path.close(); 171 172 canvas->translate(0.f, kPointSize + kPadY); 173 columnH += kPointSize + kPadY; 174 175 canvas->save(); 176 canvas->concat(matrices[m].fMatrix); 177 canvas->drawTextOnPath(kText, kTextLen, path, NULL, paint); 178 canvas->drawTextOnPath(kText, kTextLen, path, NULL, outlinePaint); 179 canvas->restore(); 180 SkPaint stroke; 181 stroke.setStyle(SkPaint::kStroke_Style); 182 canvas->translate(0.f, kPointSize + kPadY); 183 columnH += kPointSize + kPadY; 184 } 185 canvas->restore(); 186 canvas->translate(w + kPadX, 0.f); 187 } 188 if (0 == s) { 189 canvas->drawLine(0.f, -kPadY, 0.f, columnH + kPadY, outlinePaint); 190 canvas->translate(kPadX / 2, 0.f); 191 static const char kFillLabel[] = "Filled"; 192 static const char kStrokeLabel[] = "Stroked"; 193 SkScalar y = columnH + kPadY / 2; 194 SkScalar fillX = -outlinePaint.measureText(kFillLabel, strlen(kFillLabel)) - kPadX; 195 SkScalar strokeX = kPadX; 196 canvas->drawText(kFillLabel, strlen(kFillLabel), fillX, y, labelPaint); 197 canvas->drawText(kStrokeLabel, strlen(kStrokeLabel), strokeX, y, labelPaint); 198 } 199 } 200 } 201 202 virtual uint32_t onGetFlags() const SK_OVERRIDE { 203 // disable 565 for now, til mike fixes the debug assert 204 return kSkip565_Flag | kSkipTiled_Flag; 205 } 206 207 private: 208 typedef GM INHERITED; 209 }; 210 211 /////////////////////////////////////////////////////////////////////////////// 212 213 static GM* MyFactory(void*) { return new ShaderText2GM; } 214 static GMRegistry reg(MyFactory); 215 } 216
