bsalomon@google.com | fb30951 | 2011-11-30 14:13:48 +0000 | [diff] [blame] | 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 | |
| 12 | // effects |
| 13 | #include "SkGradientShader.h" |
| 14 | |
| 15 | |
| 16 | namespace skiagm { |
| 17 | |
| 18 | static void makebm(SkBitmap* bm, SkBitmap::Config config, int w, int h) { |
| 19 | bm->setConfig(config, w, h); |
| 20 | bm->allocPixels(); |
| 21 | bm->eraseColor(0); |
| 22 | |
| 23 | SkCanvas canvas(*bm); |
| 24 | |
| 25 | SkScalar wScalar = SkIntToScalar(w); |
| 26 | SkScalar hScalar = SkIntToScalar(h); |
| 27 | |
| 28 | SkPoint pt = { wScalar / 2, hScalar / 2 }; |
| 29 | |
| 30 | SkScalar radius = 4 * SkMaxScalar(wScalar, hScalar); |
| 31 | |
| 32 | SkColor colors[] = { SK_ColorRED, SK_ColorYELLOW, |
| 33 | SK_ColorGREEN, SK_ColorMAGENTA, |
| 34 | SK_ColorBLUE, SK_ColorCYAN, |
| 35 | SK_ColorRED}; |
| 36 | |
| 37 | SkScalar pos[] = {0, |
| 38 | SK_Scalar1 / 6, |
| 39 | 2 * SK_Scalar1 / 6, |
| 40 | 3 * SK_Scalar1 / 6, |
| 41 | 4 * SK_Scalar1 / 6, |
| 42 | 5 * SK_Scalar1 / 6, |
| 43 | SK_Scalar1}; |
| 44 | |
| 45 | SkPaint paint; |
| 46 | paint.setShader(SkGradientShader::CreateRadial( |
| 47 | pt, radius, |
| 48 | colors, pos, |
| 49 | SK_ARRAY_COUNT(colors), |
| 50 | SkShader::kRepeat_TileMode))->unref(); |
| 51 | SkRect rect = SkRect::MakeWH(wScalar, hScalar); |
| 52 | SkMatrix mat = SkMatrix::I(); |
| 53 | for (int i = 0; i < 4; ++i) { |
| 54 | paint.getShader()->setLocalMatrix(mat); |
| 55 | canvas.drawRect(rect, paint); |
| 56 | rect.inset(wScalar / 8, hScalar / 8); |
| 57 | mat.postScale(SK_Scalar1 / 4, SK_Scalar1 / 4); |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | static const int gSize = 1024; |
| 62 | |
| 63 | class DrawBitmapRectGM : public GM { |
| 64 | public: |
| 65 | DrawBitmapRectGM() { |
| 66 | } |
| 67 | |
| 68 | SkBitmap fLargeBitmap; |
| 69 | |
| 70 | protected: |
| 71 | SkString onShortName() { |
| 72 | return SkString("drawbitmaprect"); |
| 73 | } |
| 74 | |
| 75 | SkISize onISize() { return make_isize(gSize, gSize); } |
| 76 | |
| 77 | virtual void onDraw(SkCanvas* canvas) { |
| 78 | static const int kBmpSize = 2048; |
| 79 | if (fLargeBitmap.isNull()) { |
| 80 | makebm(&fLargeBitmap, |
| 81 | SkBitmap::kARGB_8888_Config, |
| 82 | kBmpSize, kBmpSize); |
| 83 | } |
| 84 | SkRect dstRect = { 0, 0, 64, 64}; |
| 85 | static const int kMaxSrcRectSize = 1 << (SkNextLog2(kBmpSize) + 2); |
| 86 | |
| 87 | static const int kPadX = 30; |
| 88 | static const int kPadY = 40; |
| 89 | SkPaint paint; |
| 90 | paint.setAlpha(0x20); |
| 91 | canvas->drawBitmapRect(fLargeBitmap, NULL, |
| 92 | SkRect::MakeWH(gSize * SK_Scalar1, |
| 93 | gSize * SK_Scalar1), |
| 94 | &paint); |
| 95 | canvas->translate(SK_Scalar1 * kPadX / 2, |
| 96 | SK_Scalar1 * kPadY / 2); |
| 97 | SkPaint blackPaint; |
| 98 | SkScalar titleHeight = SK_Scalar1 * 24; |
| 99 | blackPaint.setColor(SK_ColorBLACK); |
| 100 | blackPaint.setTextSize(titleHeight); |
| 101 | blackPaint.setAntiAlias(true); |
| 102 | SkString title; |
| 103 | title.printf("Bitmap size: %d x %d", kBmpSize, kBmpSize); |
| 104 | canvas->drawText(title.c_str(), title.size(), 0, |
| 105 | titleHeight, blackPaint); |
| 106 | |
| 107 | canvas->translate(0, SK_Scalar1 * kPadY / 2 + titleHeight); |
| 108 | int rowCount = 0; |
| 109 | canvas->save(); |
| 110 | for (int w = 1; w <= kMaxSrcRectSize; w *= 4) { |
| 111 | for (int h = 1; h <= kMaxSrcRectSize; h *= 4) { |
| 112 | |
| 113 | SkIRect srcRect = SkIRect::MakeXYWH((kBmpSize - w) / 2, |
| 114 | (kBmpSize - h) / 2, |
| 115 | w, h); |
| 116 | canvas->drawBitmapRect(fLargeBitmap, &srcRect, dstRect); |
| 117 | |
| 118 | SkString label; |
| 119 | label.appendf("%d x %d", w, h); |
| 120 | blackPaint.setAntiAlias(true); |
| 121 | blackPaint.setStyle(SkPaint::kFill_Style); |
| 122 | blackPaint.setTextSize(SK_Scalar1 * 10); |
| 123 | SkScalar baseline = dstRect.height() + |
| 124 | blackPaint.getTextSize() + SK_Scalar1 * 3; |
| 125 | canvas->drawText(label.c_str(), label.size(), |
| 126 | 0, baseline, |
| 127 | blackPaint); |
| 128 | blackPaint.setStyle(SkPaint::kStroke_Style); |
| 129 | blackPaint.setStrokeWidth(SK_Scalar1); |
| 130 | blackPaint.setAntiAlias(false); |
| 131 | canvas->drawRect(dstRect, blackPaint); |
| 132 | |
| 133 | canvas->translate(dstRect.width() + SK_Scalar1 * kPadX, 0); |
| 134 | ++rowCount; |
| 135 | if ((dstRect.width() + kPadX) * rowCount > gSize) { |
| 136 | canvas->restore(); |
| 137 | canvas->translate(0, dstRect.height() + SK_Scalar1 * kPadY); |
| 138 | canvas->save(); |
| 139 | rowCount = 0; |
| 140 | } |
| 141 | } |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | private: |
| 146 | typedef GM INHERITED; |
| 147 | }; |
| 148 | |
| 149 | ////////////////////////////////////////////////////////////////////////////// |
| 150 | |
| 151 | static GM* MyFactory(void*) { return new DrawBitmapRectGM; } |
| 152 | static GMRegistry reg(MyFactory); |
| 153 | |
| 154 | } |
| 155 | |