1 /* 2 * Copyright 2015 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 "SkBitmap.h" 9 #include "SkCanvas.h" 10 #include "SkRect.h" 11 #include "Test.h" 12 13 static bool has_green_pixels(const SkBitmap& bm) { 14 for (int j = 0; j < bm.height(); ++j) { 15 for (int i = 0; i < bm.width(); ++i) { 16 if (SkColorGetG(bm.getColor(i, j))) { 17 return true; 18 } 19 } 20 } 21 22 return false; 23 } 24 25 static void test_stroke_width_clipping(skiatest::Reporter* reporter) { 26 SkBitmap bm; 27 bm.allocN32Pixels(100, 10); 28 bm.eraseColor(SK_ColorTRANSPARENT); 29 30 SkCanvas canvas(bm); 31 SkPaint paint; 32 paint.setStyle(SkPaint::kStroke_Style); 33 paint.setStrokeWidth(10); 34 paint.setColor(0xff00ff00); 35 36 // clip out the left half of our canvas 37 canvas.clipRect(SkRect::MakeXYWH(51, 0, 49, 100)); 38 39 // no stroke bleed should be visible 40 canvas.drawRect(SkRect::MakeWH(44, 100), paint); 41 REPORTER_ASSERT(reporter, !has_green_pixels(bm)); 42 43 // right stroke edge should bleed into the visible area 44 canvas.scale(2, 2); 45 canvas.drawRect(SkRect::MakeWH(22, 50), paint); 46 REPORTER_ASSERT(reporter, has_green_pixels(bm)); 47 } 48 49 static void test_skbug4406(skiatest::Reporter* reporter) { 50 SkBitmap bm; 51 bm.allocN32Pixels(10, 10); 52 bm.eraseColor(SK_ColorTRANSPARENT); 53 54 SkCanvas canvas(bm); 55 const SkRect r = { 1.5f, 1, 3.5f, 3 }; 56 // draw filled green rect first 57 SkPaint paint; 58 paint.setStyle(SkPaint::kFill_Style); 59 paint.setColor(0xff00ff00); 60 paint.setStrokeWidth(1); 61 paint.setAntiAlias(true); 62 canvas.drawRect(r, paint); 63 64 // paint black with stroke rect (that asserts in bug 4406) 65 // over the filled rect, it should cover it 66 paint.setStyle(SkPaint::kStroke_Style); 67 paint.setColor(0xff000000); 68 paint.setStrokeWidth(1); 69 canvas.drawRect(r, paint); 70 REPORTER_ASSERT(reporter, !has_green_pixels(bm)); 71 72 // do it again with thinner stroke 73 paint.setStyle(SkPaint::kFill_Style); 74 paint.setColor(0xff00ff00); 75 paint.setStrokeWidth(1); 76 paint.setAntiAlias(true); 77 canvas.drawRect(r, paint); 78 // paint black with stroke rect (that asserts in bug 4406) 79 // over the filled rect, it doesnt cover it completelly with thinner stroke 80 paint.setStyle(SkPaint::kStroke_Style); 81 paint.setColor(0xff000000); 82 paint.setStrokeWidth(0.99f); 83 canvas.drawRect(r, paint); 84 REPORTER_ASSERT(reporter, has_green_pixels(bm)); 85 } 86 87 DEF_TEST(Rect, reporter) { 88 test_stroke_width_clipping(reporter); 89 test_skbug4406(reporter); 90 } 91
