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 #include "SkCanvas.h" 10 #include "SkPath.h" 11 12 static void make_bm(SkBitmap* bm) { 13 bm->allocN32Pixels(60, 60); 14 bm->eraseColor(0); 15 16 SkCanvas canvas(*bm); 17 SkPaint paint; 18 19 SkPath path; 20 path.moveTo(6, 6); 21 path.lineTo(6, 54); 22 path.lineTo(30, 54); 23 canvas.drawPath(path, paint); 24 25 paint.setStyle(SkPaint::kStroke_Style); 26 canvas.drawRect(SkRect::MakeLTRB(0.5f, 0.5f, 59.5f, 59.5f), paint); 27 } 28 29 // This creates a close, but imperfect concatenation of 30 // scaling the image up by its dst-rect 31 // scaling the image down by the matrix' scale 32 // The bug was that for cases like this, we were incorrectly trying to take a 33 // fast-path in the bitmapshader, but ended up drawing the last col of pixels 34 // twice. The fix resulted in (a) not taking the fast-path, but (b) drawing 35 // the image correctly. 36 // 37 DEF_SIMPLE_GM(bitmaprecttest, canvas, 320, 240) { 38 SkBitmap bm; 39 make_bm(&bm); 40 41 canvas->drawBitmap(bm, 150, 45, nullptr); 42 43 SkScalar scale = 0.472560018f; 44 canvas->save(); 45 canvas->scale(scale, scale); 46 canvas->drawBitmapRect(bm, SkRect::MakeXYWH(100, 100, 128, 128), nullptr); 47 canvas->restore(); 48 49 canvas->scale(-1, 1); 50 canvas->drawBitmap(bm, -310, 45, nullptr); 51 } 52
