tests/BitmapTransformerTest.cpp - Issue 14267031: ARGB image encoder for checksums.

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Issue 14267031: ARGB image encoder for checksums. (Closed) Base URL: http://skia.googlecode.com/svn/trunk/

Patch Set: Something which can actually be checked in. Created 7 years, 8 months ago

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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, su pportedPixelFormat);

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,0x00,0x0 0, // red

52 0xff,0x00,0xff,0x00, 0xff,0x00,0xff,0x00, 0xff,0x00,0xff,0x0 0, // green

53 0xff,0x00,0x00,0xff, 0xff,0x00,0x00,0xff, 0xff,0x00,0x00,0xf f, // blue

54 0xff,0x00,0x00,0xff, 0xff,0x00,0x00,0xff, 0xff,0x00,0x00,0xf f, // blue

55 0xff,0x00,0x00,0xff, 0xff,0x00,0x00,0xff, 0xff,0x00,0x00,0xf f, // 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) == oldC olor);

70 SkPMColor* pixel = static_cast<SkPMColor *>(bitmap.getAd dr(x, y));

71 *pixel = SkPreMultiplyColor(newColors[y]);

72 REPORTER_ASSERT(fReporter, bitmap.getColor(x, y) == newC olors[y]);

73 }

74 }

75 bitmap.unlockPixels();

76

77 // Transform the bitmap and confirm we got the expected results.

78 SkBitmapTransformer transformer = SkBitmapTransformer(bitmap, su pportedPixelFormat);

79 REPORTER_ASSERT(fReporter, transformer.isValid());

80 REPORTER_ASSERT(fReporter, transformer.bytesNeededPerRow() == kW idth * 4);

81 REPORTER_ASSERT(fReporter, transformer.bytesNeededTotal() == kWi dth * 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 }

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