1 2 /* 3 * Copyright 2011 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 #include "gm.h" 9 #include "SkShader.h" 10 #include "SkColorPriv.h" 11 #include "SkBlurMaskFilter.h" 12 13 // effects 14 #include "SkGradientShader.h" 15 16 17 namespace skiagm { 18 19 static SkBitmap make_chessbm(int w, int h) { 20 SkBitmap bm; 21 bm.setConfig(SkBitmap::kARGB_8888_Config , w, h); 22 bm.allocPixels(); 23 24 for (int y = 0; y < bm.height(); y++) { 25 uint32_t* p = bm.getAddr32(0, y); 26 for (int x = 0; x < bm.width(); x++) { 27 p[x] = ((x + y) & 1) ? SK_ColorWHITE : SK_ColorBLACK; 28 } 29 } 30 bm.unlockPixels(); 31 return bm; 32 } 33 34 static void makebm(SkBitmap* bm, SkBitmap::Config config, int w, int h) { 35 bm->setConfig(config, w, h); 36 bm->allocPixels(); 37 bm->eraseColor(SK_ColorTRANSPARENT); 38 39 SkCanvas canvas(*bm); 40 41 SkScalar wScalar = SkIntToScalar(w); 42 SkScalar hScalar = SkIntToScalar(h); 43 44 SkPoint pt = { wScalar / 2, hScalar / 2 }; 45 46 SkScalar radius = 4 * SkMaxScalar(wScalar, hScalar); 47 48 SkColor colors[] = { SK_ColorRED, SK_ColorYELLOW, 49 SK_ColorGREEN, SK_ColorMAGENTA, 50 SK_ColorBLUE, SK_ColorCYAN, 51 SK_ColorRED}; 52 53 SkScalar pos[] = {0, 54 SK_Scalar1 / 6, 55 2 * SK_Scalar1 / 6, 56 3 * SK_Scalar1 / 6, 57 4 * SK_Scalar1 / 6, 58 5 * SK_Scalar1 / 6, 59 SK_Scalar1}; 60 61 SkPaint paint; 62 paint.setShader(SkGradientShader::CreateRadial( 63 pt, radius, 64 colors, pos, 65 SK_ARRAY_COUNT(colors), 66 SkShader::kRepeat_TileMode))->unref(); 67 SkRect rect = SkRect::MakeWH(wScalar, hScalar); 68 SkMatrix mat = SkMatrix::I(); 69 for (int i = 0; i < 4; ++i) { 70 paint.getShader()->setLocalMatrix(mat); 71 canvas.drawRect(rect, paint); 72 rect.inset(wScalar / 8, hScalar / 8); 73 mat.postScale(SK_Scalar1 / 4, SK_Scalar1 / 4); 74 } 75 } 76 77 static const int gSize = 1024; 78 79 class DrawBitmapRectGM : public GM { 80 public: 81 DrawBitmapRectGM() { 82 } 83 84 SkBitmap fLargeBitmap; 85 86 protected: 87 SkString onShortName() { 88 return SkString("drawbitmaprect"); 89 } 90 91 SkISize onISize() { return make_isize(gSize, gSize); } 92 93 virtual void onDraw(SkCanvas* canvas) { 94 static const int kBmpSize = 2048; 95 if (fLargeBitmap.isNull()) { 96 makebm(&fLargeBitmap, 97 SkBitmap::kARGB_8888_Config, 98 kBmpSize, kBmpSize); 99 } 100 SkRect dstRect = { 0, 0, SkIntToScalar(64), SkIntToScalar(64)}; 101 static const int kMaxSrcRectSize = 1 << (SkNextLog2(kBmpSize) + 2); 102 103 static const int kPadX = 30; 104 static const int kPadY = 40; 105 SkPaint paint; 106 paint.setAlpha(0x20); 107 canvas->drawBitmapRect(fLargeBitmap, NULL, 108 SkRect::MakeWH(gSize * SK_Scalar1, 109 gSize * SK_Scalar1), 110 &paint); 111 canvas->translate(SK_Scalar1 * kPadX / 2, 112 SK_Scalar1 * kPadY / 2); 113 SkPaint blackPaint; 114 SkScalar titleHeight = SK_Scalar1 * 24; 115 blackPaint.setColor(SK_ColorBLACK); 116 blackPaint.setTextSize(titleHeight); 117 blackPaint.setAntiAlias(true); 118 SkString title; 119 title.printf("Bitmap size: %d x %d", kBmpSize, kBmpSize); 120 canvas->drawText(title.c_str(), title.size(), 0, 121 titleHeight, blackPaint); 122 123 canvas->translate(0, SK_Scalar1 * kPadY / 2 + titleHeight); 124 int rowCount = 0; 125 canvas->save(); 126 for (int w = 1; w <= kMaxSrcRectSize; w *= 4) { 127 for (int h = 1; h <= kMaxSrcRectSize; h *= 4) { 128 129 SkIRect srcRect = SkIRect::MakeXYWH((kBmpSize - w) / 2, 130 (kBmpSize - h) / 2, 131 w, h); 132 canvas->drawBitmapRect(fLargeBitmap, &srcRect, dstRect); 133 134 SkString label; 135 label.appendf("%d x %d", w, h); 136 blackPaint.setAntiAlias(true); 137 blackPaint.setStyle(SkPaint::kFill_Style); 138 blackPaint.setTextSize(SK_Scalar1 * 10); 139 SkScalar baseline = dstRect.height() + 140 blackPaint.getTextSize() + SK_Scalar1 * 3; 141 canvas->drawText(label.c_str(), label.size(), 142 0, baseline, 143 blackPaint); 144 blackPaint.setStyle(SkPaint::kStroke_Style); 145 blackPaint.setStrokeWidth(SK_Scalar1); 146 blackPaint.setAntiAlias(false); 147 canvas->drawRect(dstRect, blackPaint); 148 149 canvas->translate(dstRect.width() + SK_Scalar1 * kPadX, 0); 150 ++rowCount; 151 if ((dstRect.width() + kPadX) * rowCount > gSize) { 152 canvas->restore(); 153 canvas->translate(0, dstRect.height() + SK_Scalar1 * kPadY); 154 canvas->save(); 155 rowCount = 0; 156 } 157 } 158 } 159 160 { 161 // test the following code path: 162 // SkGpuDevice::drawPath() -> SkGpuDevice::drawWithMaskFilter() 163 SkIRect srcRect; 164 SkPaint paint; 165 SkBitmap bm; 166 167 bm = make_chessbm(5, 5); 168 paint.setFilterBitmap(true); 169 170 srcRect.setXYWH(1, 1, 3, 3); 171 SkMaskFilter* mf = SkBlurMaskFilter::Create( 172 5, 173 SkBlurMaskFilter::kNormal_BlurStyle, 174 SkBlurMaskFilter::kHighQuality_BlurFlag | 175 SkBlurMaskFilter::kIgnoreTransform_BlurFlag); 176 paint.setMaskFilter(mf)->unref(); 177 canvas->drawBitmapRect(bm, &srcRect, dstRect, &paint); 178 } 179 } 180 181 private: 182 typedef GM INHERITED; 183 }; 184 185 ////////////////////////////////////////////////////////////////////////////// 186 187 #ifndef SK_BUILD_FOR_ANDROID 188 static GM* MyFactory(void*) { return new DrawBitmapRectGM; } 189 static GMRegistry reg(MyFactory); 190 #endif 191 } 192
