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 /** 10 * Tests for SkBitmapTransformer.h and SkBitmapTransformer.cpp 11 */ 12 13 #include "Test.h" 14 #include "SkBitmap.h" 15 #include "SkBitmapTransformer.h" 16 17 namespace skiatest { 18 class BitmapTransformerTestClass : public Test { 19 public: 20 static Test* Factory(void*) {return SkNEW(BitmapTransformerTestClass); } 21 protected: 22 virtual void onGetName(SkString* name) { name->set("BitmapTransformer"); } 23 virtual void onRun(Reporter* reporter) { 24 this->fReporter = reporter; 25 RunTest(); 26 } 27 private: 28 void RunTest() { 29 SkBitmap bitmap; 30 SkBitmap::Config supportedConfig = SkBitmap::kARGB_8888_Config; 31 SkBitmap::Config unsupportedConfig = SkBitmap::kARGB_4444_Config; 32 SkBitmapTransformer::PixelFormat supportedPixelFormat = 33 SkBitmapTransformer::kARGB_8888_Premul_PixelFormat; 34 const int kWidth = 55; 35 const int kHeight = 333; 36 37 // Transformations that we know are unsupported: 38 { 39 bitmap.setConfig(unsupportedConfig, kWidth, kHeight); 40 SkBitmapTransformer transformer = SkBitmapTransformer(bitmap, supportedPixelFormat); 41 REPORTER_ASSERT(fReporter, !transformer.isValid()); 42 } 43 44 // Valid transformations: 45 { 46 // Bytes we expect to get: 47 const int kWidth = 3; 48 const int kHeight = 5; 49 const unsigned char comparisonBuffer[] = { 50 // kHeight rows, each with kWidth pixels, premultiplied ARGB for each pixel 51 0xff,0xff,0x00,0x00, 0xff,0xff,0x00,0x00, 0xff,0xff,0x00,0x00, // red 52 0xff,0x00,0xff,0x00, 0xff,0x00,0xff,0x00, 0xff,0x00,0xff,0x00, // green 53 0xff,0x00,0x00,0xff, 0xff,0x00,0x00,0xff, 0xff,0x00,0x00,0xff, // blue 54 0xff,0x00,0x00,0xff, 0xff,0x00,0x00,0xff, 0xff,0x00,0x00,0xff, // blue 55 0xff,0x00,0x00,0xff, 0xff,0x00,0x00,0xff, 0xff,0x00,0x00,0xff, // blue 56 }; 57 58 // A bitmap that should generate the above bytes: 59 bitmap.setConfig(supportedConfig, kWidth, kHeight); 60 REPORTER_ASSERT(fReporter, bitmap.allocPixels()); 61 bitmap.setIsOpaque(true); 62 bitmap.eraseColor(SK_ColorBLUE); 63 bitmap.lockPixels(); 64 // Change rows [0,1] from blue to [red,green]. 65 SkColor oldColor = SK_ColorBLUE; 66 SkColor newColors[] = {SK_ColorRED, SK_ColorGREEN}; 67 for (int y = 0; y <= 1; y++) { 68 for (int x = 0; x < kWidth; x++) { 69 REPORTER_ASSERT(fReporter, bitmap.getColor(x, y) == oldColor); 70 SkPMColor* pixel = static_cast<SkPMColor *>(bitmap.getAddr(x, y)); 71 *pixel = SkPreMultiplyColor(newColors[y]); 72 REPORTER_ASSERT(fReporter, bitmap.getColor(x, y) == newColors[y]); 73 } 74 } 75 bitmap.unlockPixels(); 76 77 // Transform the bitmap and confirm we got the expected results. 78 SkBitmapTransformer transformer = SkBitmapTransformer(bitmap, supportedPixelFormat); 79 REPORTER_ASSERT(fReporter, transformer.isValid()); 80 REPORTER_ASSERT(fReporter, transformer.bytesNeededPerRow() == kWidth * 4); 81 REPORTER_ASSERT(fReporter, transformer.bytesNeededTotal() == kWidth * kHeight * 4); 82 int bufferSize = transformer.bytesNeededTotal(); 83 SkAutoMalloc pixelBufferManager(bufferSize); 84 char *pixelBuffer = static_cast<char *>(pixelBufferManager.get()); 85 REPORTER_ASSERT(fReporter, 86 transformer.copyBitmapToPixelBuffer(pixelBuffer, bufferSize)); 87 REPORTER_ASSERT(fReporter, bufferSize == sizeof(comparisonBuffer)); 88 REPORTER_ASSERT(fReporter, memcmp(pixelBuffer, comparisonBuffer, bufferSize) == 0); 89 } 90 91 } 92 93 Reporter* fReporter; 94 }; 95 96 static TestRegistry gReg(BitmapTransformerTestClass::Factory); 97 } 98
