1 2 /* 3 * Copyright 2012 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 #include "SkBitmap.h" 10 #include "SkBitmapFactory.h" 11 #include "SkCanvas.h" 12 #include "SkColor.h" 13 #include "SkData.h" 14 #include "SkImageEncoder.h" 15 #include "SkPaint.h" 16 #include "SkStream.h" 17 #include "SkTemplates.h" 18 #include "Test.h" 19 20 static SkBitmap* create_bitmap() { 21 SkBitmap* bm = SkNEW(SkBitmap); 22 const int W = 100, H = 100; 23 bm->setConfig(SkBitmap::kARGB_8888_Config, W, H); 24 bm->allocPixels(); 25 bm->eraseColor(SK_ColorBLACK); 26 SkCanvas canvas(*bm); 27 SkPaint paint; 28 paint.setColor(SK_ColorBLUE); 29 canvas.drawRectCoords(0, 0, SkIntToScalar(W/2), SkIntToScalar(H/2), paint); 30 return bm; 31 } 32 33 static SkData* create_data_from_bitmap(const SkBitmap& bm) { 34 SkDynamicMemoryWStream stream; 35 if (SkImageEncoder::EncodeStream(&stream, bm, SkImageEncoder::kPNG_Type, 100)) { 36 return stream.copyToData(); 37 } 38 return NULL; 39 } 40 41 static void assert_bounds_equal(skiatest::Reporter* reporter, const SkBitmap& bm1, 42 const SkBitmap& bm2) { 43 REPORTER_ASSERT(reporter, bm1.width() == bm2.width()); 44 REPORTER_ASSERT(reporter, bm1.height() == bm2.height()); 45 } 46 47 static void TestBitmapFactory(skiatest::Reporter* reporter) { 48 SkAutoTDelete<SkBitmap> bitmap(create_bitmap()); 49 SkASSERT(bitmap.get() != NULL); 50 51 SkAutoDataUnref encodedBitmap(create_data_from_bitmap(*bitmap.get())); 52 if (encodedBitmap.get() == NULL) { 53 // Encoding failed. 54 return; 55 } 56 57 SkBitmap bitmapFromFactory; 58 bool success = SkBitmapFactory::DecodeBitmap(&bitmapFromFactory, encodedBitmap); 59 // This assumes that if the encoder worked, the decoder should also work, so the above call 60 // should not fail. 61 REPORTER_ASSERT(reporter, success); 62 assert_bounds_equal(reporter, *bitmap.get(), bitmapFromFactory); 63 REPORTER_ASSERT(reporter, bitmapFromFactory.pixelRef() != NULL); 64 65 // When only requesting that the bounds be decoded, the bounds should be set properly while 66 // the pixels should be empty. 67 SkBitmap boundedBitmap; 68 success = SkBitmapFactory::DecodeBitmap(&boundedBitmap, encodedBitmap, 69 SkBitmapFactory::kDecodeBoundsOnly_Constraint); 70 REPORTER_ASSERT(reporter, success); 71 assert_bounds_equal(reporter, *bitmap.get(), boundedBitmap); 72 REPORTER_ASSERT(reporter, boundedBitmap.pixelRef() == NULL); 73 } 74 75 #include "TestClassDef.h" 76 DEFINE_TESTCLASS("BitmapFactory", TestBitmapFactoryClass, TestBitmapFactory) 77