| |
| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| #include "gm.h" |
| #include "SkShader.h" |
| #include "SkColorPriv.h" |
| |
| // effects |
| #include "SkGradientShader.h" |
| |
| |
| namespace skiagm { |
| |
| static void makebm(SkBitmap* bm, SkBitmap::Config config, int w, int h) { |
| bm->setConfig(config, w, h); |
| bm->allocPixels(); |
| bm->eraseColor(0); |
| |
| SkCanvas canvas(*bm); |
| |
| SkScalar wScalar = SkIntToScalar(w); |
| SkScalar hScalar = SkIntToScalar(h); |
| |
| SkPoint pt = { wScalar / 2, hScalar / 2 }; |
| |
| SkScalar radius = 4 * SkMaxScalar(wScalar, hScalar); |
| |
| SkColor colors[] = { SK_ColorRED, SK_ColorYELLOW, |
| SK_ColorGREEN, SK_ColorMAGENTA, |
| SK_ColorBLUE, SK_ColorCYAN, |
| SK_ColorRED}; |
| |
| SkScalar pos[] = {0, |
| SK_Scalar1 / 6, |
| 2 * SK_Scalar1 / 6, |
| 3 * SK_Scalar1 / 6, |
| 4 * SK_Scalar1 / 6, |
| 5 * SK_Scalar1 / 6, |
| SK_Scalar1}; |
| |
| SkPaint paint; |
| paint.setShader(SkGradientShader::CreateRadial( |
| pt, radius, |
| colors, pos, |
| SK_ARRAY_COUNT(colors), |
| SkShader::kRepeat_TileMode))->unref(); |
| SkRect rect = SkRect::MakeWH(wScalar, hScalar); |
| SkMatrix mat = SkMatrix::I(); |
| for (int i = 0; i < 4; ++i) { |
| paint.getShader()->setLocalMatrix(mat); |
| canvas.drawRect(rect, paint); |
| rect.inset(wScalar / 8, hScalar / 8); |
| mat.postScale(SK_Scalar1 / 4, SK_Scalar1 / 4); |
| } |
| } |
| |
| static const int gSize = 1024; |
| |
| class DrawBitmapRectGM : public GM { |
| public: |
| DrawBitmapRectGM() { |
| } |
| |
| SkBitmap fLargeBitmap; |
| |
| protected: |
| SkString onShortName() { |
| return SkString("drawbitmaprect"); |
| } |
| |
| SkISize onISize() { return make_isize(gSize, gSize); } |
| |
| virtual void onDraw(SkCanvas* canvas) { |
| static const int kBmpSize = 2048; |
| if (fLargeBitmap.isNull()) { |
| makebm(&fLargeBitmap, |
| SkBitmap::kARGB_8888_Config, |
| kBmpSize, kBmpSize); |
| } |
| SkRect dstRect = { 0, 0, 64, 64}; |
| static const int kMaxSrcRectSize = 1 << (SkNextLog2(kBmpSize) + 2); |
| |
| static const int kPadX = 30; |
| static const int kPadY = 40; |
| SkPaint paint; |
| paint.setAlpha(0x20); |
| canvas->drawBitmapRect(fLargeBitmap, NULL, |
| SkRect::MakeWH(gSize * SK_Scalar1, |
| gSize * SK_Scalar1), |
| &paint); |
| canvas->translate(SK_Scalar1 * kPadX / 2, |
| SK_Scalar1 * kPadY / 2); |
| SkPaint blackPaint; |
| SkScalar titleHeight = SK_Scalar1 * 24; |
| blackPaint.setColor(SK_ColorBLACK); |
| blackPaint.setTextSize(titleHeight); |
| blackPaint.setAntiAlias(true); |
| SkString title; |
| title.printf("Bitmap size: %d x %d", kBmpSize, kBmpSize); |
| canvas->drawText(title.c_str(), title.size(), 0, |
| titleHeight, blackPaint); |
| |
| canvas->translate(0, SK_Scalar1 * kPadY / 2 + titleHeight); |
| int rowCount = 0; |
| canvas->save(); |
| for (int w = 1; w <= kMaxSrcRectSize; w *= 4) { |
| for (int h = 1; h <= kMaxSrcRectSize; h *= 4) { |
| |
| SkIRect srcRect = SkIRect::MakeXYWH((kBmpSize - w) / 2, |
| (kBmpSize - h) / 2, |
| w, h); |
| canvas->drawBitmapRect(fLargeBitmap, &srcRect, dstRect); |
| |
| SkString label; |
| label.appendf("%d x %d", w, h); |
| blackPaint.setAntiAlias(true); |
| blackPaint.setStyle(SkPaint::kFill_Style); |
| blackPaint.setTextSize(SK_Scalar1 * 10); |
| SkScalar baseline = dstRect.height() + |
| blackPaint.getTextSize() + SK_Scalar1 * 3; |
| canvas->drawText(label.c_str(), label.size(), |
| 0, baseline, |
| blackPaint); |
| blackPaint.setStyle(SkPaint::kStroke_Style); |
| blackPaint.setStrokeWidth(SK_Scalar1); |
| blackPaint.setAntiAlias(false); |
| canvas->drawRect(dstRect, blackPaint); |
| |
| canvas->translate(dstRect.width() + SK_Scalar1 * kPadX, 0); |
| ++rowCount; |
| if ((dstRect.width() + kPadX) * rowCount > gSize) { |
| canvas->restore(); |
| canvas->translate(0, dstRect.height() + SK_Scalar1 * kPadY); |
| canvas->save(); |
| rowCount = 0; |
| } |
| } |
| } |
| } |
| |
| private: |
| typedef GM INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static GM* MyFactory(void*) { return new DrawBitmapRectGM; } |
| static GMRegistry reg(MyFactory); |
| |
| } |
| |