skia/public/type_converters.cc - Issue 2014013002: Add SkBitmap StructTraits for skia::mojo::Bitmap.

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Issue 2014013002: Add SkBitmap StructTraits for skia::mojo::Bitmap. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Sync and rebase. Created 4 years, 6 months ago

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1 // Copyright 2015 The Chromium Authors. All rights reserved.

2 // Use of this source code is governed by a BSD-style license that can be

3 // found in the LICENSE file.

4

5 #include "skia/public/type_converters.h"

6

7 #include <stddef.h>

8 #include <stdint.h>

9 #include <string.h>

10

11 #include "base/logging.h"

12 #include "third_party/skia/include/core/SkBitmap.h"

13

14 namespace mojo {

15

16 namespace {

17

18 SkColorType MojoColorTypeToSk(skia::mojom::ColorType type) {

19 switch (type) {

20 case skia::mojom::ColorType::UNKNOWN:

21 return kUnknown_SkColorType;

22 case skia::mojom::ColorType::ALPHA_8:

23 return kAlpha_8_SkColorType;

24 case skia::mojom::ColorType::RGB_565:

25 return kRGB_565_SkColorType;

26 case skia::mojom::ColorType::ARGB_4444:

27 return kARGB_4444_SkColorType;

28 case skia::mojom::ColorType::RGBA_8888:

29 return kRGBA_8888_SkColorType;

30 case skia::mojom::ColorType::BGRA_8888:

31 return kBGRA_8888_SkColorType;

32 case skia::mojom::ColorType::INDEX_8:

33 return kIndex_8_SkColorType;

34 case skia::mojom::ColorType::GRAY_8:

35 return kGray_8_SkColorType;

36 default:

37 NOTREACHED();

38 }

39 return kUnknown_SkColorType;

40 }

41

42 SkAlphaType MojoAlphaTypeToSk(skia::mojom::AlphaType type) {

43 switch (type) {

44 case skia::mojom::AlphaType::UNKNOWN:

45 return kUnknown_SkAlphaType;

46 case skia::mojom::AlphaType::ALPHA_TYPE_OPAQUE:

47 return kOpaque_SkAlphaType;

48 case skia::mojom::AlphaType::PREMUL:

49 return kPremul_SkAlphaType;

50 case skia::mojom::AlphaType::UNPREMUL:

51 return kUnpremul_SkAlphaType;

52 default:

53 NOTREACHED();

54 }

55 return kUnknown_SkAlphaType;

56 }

57

58 skia::mojom::ColorType SkColorTypeToMojo(SkColorType type) {

59 switch (type) {

60 case kUnknown_SkColorType:

61 return skia::mojom::ColorType::UNKNOWN;

62 case kAlpha_8_SkColorType:

63 return skia::mojom::ColorType::ALPHA_8;

64 case kRGB_565_SkColorType:

65 return skia::mojom::ColorType::RGB_565;

66 case kARGB_4444_SkColorType:

67 return skia::mojom::ColorType::ARGB_4444;

68 case kRGBA_8888_SkColorType:

69 return skia::mojom::ColorType::RGBA_8888;

70 case kBGRA_8888_SkColorType:

71 return skia::mojom::ColorType::BGRA_8888;

72 case kIndex_8_SkColorType:

73 return skia::mojom::ColorType::INDEX_8;

74 case kGray_8_SkColorType:

75 return skia::mojom::ColorType::GRAY_8;

76 default:

77 NOTREACHED();

78 }

79 return skia::mojom::ColorType::UNKNOWN;

80 }

81

82 skia::mojom::AlphaType SkAlphaTypeToMojo(SkAlphaType type) {

83 switch (type) {

84 case kUnknown_SkAlphaType:

85 return skia::mojom::AlphaType::UNKNOWN;

86 case kOpaque_SkAlphaType:

87 return skia::mojom::AlphaType::ALPHA_TYPE_OPAQUE;

88 case kPremul_SkAlphaType:

89 return skia::mojom::AlphaType::PREMUL;

90 case kUnpremul_SkAlphaType:

91 return skia::mojom::AlphaType::UNPREMUL;

92 default:

93 NOTREACHED();

94 }

95 return skia::mojom::AlphaType::UNKNOWN;

96 }

97

98 } // namespace

99

100 SkBitmap TypeConverter<SkBitmap, skia::mojom::BitmapPtr>::Convert(

101 const skia::mojom::BitmapPtr& image) {

102 SkBitmap bitmap;

103 if (image.is_null())

104 return bitmap;

105 if (!bitmap.tryAllocPixels(SkImageInfo::Make(

106 image->width, image->height, MojoColorTypeToSk(image->color_type),

107 MojoAlphaTypeToSk(image->alpha_type)))) {

108 return SkBitmap();

109 }

110 if (bitmap.getSize() != image->pixel_data.size() \|\| !bitmap.getPixels()) {

111 return SkBitmap();

112 }

113

114 memcpy(bitmap.getPixels(), &image->pixel_data[0], bitmap.getSize());

115 return bitmap;

116 }

117

118 skia::mojom::BitmapPtr TypeConverter<skia::mojom::BitmapPtr, SkBitmap>::Convert(

119 const SkBitmap& bitmap) {

120 if (bitmap.isNull())

121 return nullptr;

122

123 // NOTE: This code doesn't correctly serialize Index8 bitmaps.

124 const SkImageInfo& info = bitmap.info();

125 DCHECK_NE(info.colorType(), kIndex_8_SkColorType);

126 if (info.colorType() == kIndex_8_SkColorType)

127 return nullptr;

128 skia::mojom::BitmapPtr result = skia::mojom::Bitmap::New();

129 result->color_type = SkColorTypeToMojo(info.colorType());

130 result->alpha_type = SkAlphaTypeToMojo(info.alphaType());

131 result->width = info.width();

132 result->height = info.height();

133 size_t size = bitmap.getSize();

134 size_t row_bytes = bitmap.rowBytes();

135 result->pixel_data = mojo::Array<uint8_t>::New(size);

136 if (!bitmap.readPixels(info, &result->pixel_data[0], row_bytes, 0, 0))

137 return nullptr;

138 return result;

139 }

140

141 } // namespace mojo

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