third_party/WebKit/Source/platform/image-encoders/WEBPImageEncoder.cpp - Issue 2891373002: Use SkPngEncoder and SkWebpEncoder in WebKit platform

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Issue 2891373002: Use SkPngEncoder and SkWebpEncoder in WebKit platform (Closed)

Patch Set: Adjust comments Created 3 years, 7 months ago

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1 /*

2 * Copyright (c) 2011, Google Inc. All rights reserved.

3 *

4 * Redistribution and use in source and binary forms, with or without

5 * modification, are permitted provided that the following conditions are

6 * met:

7 *

8 * * Redistributions of source code must retain the above copyright

9 * notice, this list of conditions and the following disclaimer.

10 * * Redistributions in binary form must reproduce the above

11 * copyright notice, this list of conditions and the following disclaimer

12 * in the documentation and/or other materials provided with the

13 * distribution.

14 * * Neither the name of Google Inc. nor the names of its

15 * contributors may be used to endorse or promote products derived from

16 * this software without specific prior written permission.

17 *

18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

29 */

30

31 #include "platform/image-encoders/WEBPImageEncoder.h"

32

33 #include "platform/geometry/IntSize.h"

34 #include "platform/graphics/ImageBuffer.h"

35 #include "webp/encode.h"

36

37 namespace blink {

38

39 static int WriteOutput(const uint8_t* data,

40 size_t size,

41 const WebPPicture* const picture) {

42 static_cast<Vector<unsigned char>*>(picture->custom_ptr)->Append(data, size);

43 return 1;

44 }

45

46 static bool EncodePixels(const IntSize& image_size,

47 const unsigned char* pixels,

48 int quality,

49 Vector<unsigned char>* output) {

50 if (image_size.Width() <= 0 \|\| image_size.Width() > WEBP_MAX_DIMENSION)

51 return false;

52 if (image_size.Height() <= 0 \|\| image_size.Height() > WEBP_MAX_DIMENSION)

53 return false;

54

55 WebPConfig config;

56 if (!WebPConfigInit(&config))

57 return false;

58 WebPPicture picture;

59 if (!WebPPictureInit(&picture))

60 return false;

61

62 picture.width = image_size.Width();

63 picture.height = image_size.Height();

64

65 bool use_lossless_encoding = (quality >= 100);

66 if (use_lossless_encoding)

67 picture.use_argb = 1;

68 if (!WebPPictureImportRGBA(&picture, pixels, picture.width * 4))

69 return false;

70

71 picture.custom_ptr = output;

72 picture.writer = &WriteOutput;

73

74 if (use_lossless_encoding) {

75 config.lossless = 1;

76 config.quality = 75;

77 config.method = 0;

78 } else {

79 config.quality = quality;

80 config.method = 3;

81 }

82

83 bool success = WebPEncode(&config, &picture);

84 WebPPictureFree(&picture);

85 return success;

86 }

87

88 bool WEBPImageEncoder::Encode(const ImageDataBuffer& image_data,

89 int quality,

90 Vector<unsigned char>* output) {

91 if (!image_data.Pixels())

92 return false;

93

94 return EncodePixels(image_data.size(), image_data.Pixels(), quality, output);

95 }

96

97 } // namespace blink

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