1 /* 2 * Copyright 2011 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 "SkCanvas.h" 9 #include "SkDrawLooper.h" 10 #include "Test.h" 11 12 /* 13 * Subclass of looper that just draws once, with an offset in X. 14 */ 15 class TestLooper : public SkDrawLooper { 16 public: 17 bool fOnce; 18 19 virtual void init(SkCanvas*) SK_OVERRIDE { 20 fOnce = true; 21 } 22 23 virtual bool next(SkCanvas* canvas, SkPaint*) SK_OVERRIDE { 24 if (fOnce) { 25 fOnce = false; 26 canvas->translate(SkIntToScalar(10), 0); 27 return true; 28 } 29 return false; 30 } 31 32 #ifdef SK_DEVELOPER 33 virtual void toString(SkString* str) const SK_OVERRIDE { 34 str->append("TestLooper:"); 35 } 36 #endif 37 38 SK_DECLARE_UNFLATTENABLE_OBJECT() 39 }; 40 41 static void test_drawBitmap(skiatest::Reporter* reporter) { 42 SkBitmap src; 43 src.setConfig(SkBitmap::kARGB_8888_Config, 10, 10); 44 src.allocPixels(); 45 src.eraseColor(SK_ColorWHITE); 46 47 SkBitmap dst; 48 dst.setConfig(SkBitmap::kARGB_8888_Config, 10, 10); 49 dst.allocPixels(); 50 dst.eraseColor(SK_ColorTRANSPARENT); 51 52 SkCanvas canvas(dst); 53 SkPaint paint; 54 55 // we are initially transparent 56 REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5)); 57 58 // we see the bitmap drawn 59 canvas.drawBitmap(src, 0, 0, &paint); 60 REPORTER_ASSERT(reporter, 0xFFFFFFFF == *dst.getAddr32(5, 5)); 61 62 // reverify we are clear again 63 dst.eraseColor(SK_ColorTRANSPARENT); 64 REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5)); 65 66 // if the bitmap is clipped out, we don't draw it 67 canvas.drawBitmap(src, SkIntToScalar(-10), 0, &paint); 68 REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5)); 69 70 // now install our looper, which will draw, since it internally translates 71 // to the left. The test is to ensure that canvas' quickReject machinary 72 // allows us through, even though sans-looper we would look like we should 73 // be clipped out. 74 paint.setLooper(new TestLooper)->unref(); 75 canvas.drawBitmap(src, SkIntToScalar(-10), 0, &paint); 76 REPORTER_ASSERT(reporter, 0xFFFFFFFF == *dst.getAddr32(5, 5)); 77 } 78 79 static void test(skiatest::Reporter* reporter) { 80 test_drawBitmap(reporter); 81 } 82 83 #include "TestClassDef.h" 84 DEFINE_TESTCLASS("QuickReject", QuickRejectClass, test) 85
