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 virtual Factory getFactory() SK_OVERRIDE { 33 return NULL; 34 } 35 }; 36 37 static void test_drawBitmap(skiatest::Reporter* reporter) { 38 SkBitmap src; 39 src.setConfig(SkBitmap::kARGB_8888_Config, 10, 10); 40 src.allocPixels(); 41 src.eraseColor(SK_ColorWHITE); 42 43 SkBitmap dst; 44 dst.setConfig(SkBitmap::kARGB_8888_Config, 10, 10); 45 dst.allocPixels(); 46 dst.eraseColor(0); 47 48 SkCanvas canvas(dst); 49 SkPaint paint; 50 51 // we are initially transparent 52 REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5)); 53 54 // we see the bitmap drawn 55 canvas.drawBitmap(src, 0, 0, &paint); 56 REPORTER_ASSERT(reporter, 0xFFFFFFFF == *dst.getAddr32(5, 5)); 57 58 // reverify we are clear again 59 dst.eraseColor(0); 60 REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5)); 61 62 // if the bitmap is clipped out, we don't draw it 63 canvas.drawBitmap(src, SkIntToScalar(-10), 0, &paint); 64 REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5)); 65 66 // now install our looper, which will draw, since it internally translates 67 // to the left. The test is to ensure that canvas' quickReject machinary 68 // allows us through, even though sans-looper we would look like we should 69 // be clipped out. 70 paint.setLooper(new TestLooper)->unref(); 71 canvas.drawBitmap(src, SkIntToScalar(-10), 0, &paint); 72 REPORTER_ASSERT(reporter, 0xFFFFFFFF == *dst.getAddr32(5, 5)); 73 } 74 75 static void test(skiatest::Reporter* reporter) { 76 test_drawBitmap(reporter); 77 } 78 79 #include "TestClassDef.h" 80 DEFINE_TESTCLASS("QuickReject", QuickRejectClass, test) 81
