src/images/SkImageEncoder_argb.cpp - Issue 1836493002: Rename encoders to Sk*ImageEncoder

Side by Side Diff: src/images/SkImageEncoder_argb.cpp

Issue 1836493002: Rename encoders to Sk*ImageEncoder (Closed) Base URL: https://skia.googlesource.com/skia.git@master

Patch Set: Created 4 years, 9 months ago

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1 /*

2 * Copyright 2013 Google Inc.

3 *

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

5 * found in the LICENSE file.

6 */

7

8 #include "SkImageEncoder.h"

9 #include "SkBitmap.h"

10 #include "SkColorPriv.h"

11 #include "SkStream.h"

12 #include "SkTemplates.h"

13

14 class SkARGBImageEncoder : public SkImageEncoder {

15 protected:

16 bool onEncode(SkWStream* stream, const SkBitmap& bm, int quality) override;

17

18 private:

19 typedef SkImageEncoder INHERITED;

20 };

21

22 typedef void (ScanlineImporter)(const uint8_t in, uint8_t* argb, int width,

23 const SkPMColor* SK_RESTRICT ctable);

24

25 static void ARGB_8888_To_ARGB(const uint8_t* in, uint8_t* argb, int width, const SkPMColor*) {

26 const uint32_t* SK_RESTRICT src = (const uint32_t*)in;

27 for (int i = 0; i < width; ++i) {

28 const uint32_t c = *src++;

29 argb[0] = SkGetPackedA32(c);

30 argb[1] = SkGetPackedR32(c);

31 argb[2] = SkGetPackedG32(c);

32 argb[3] = SkGetPackedB32(c);

33 argb += 4;

34 }

35 }

36

37 static void RGB_565_To_ARGB(const uint8_t* in, uint8_t* argb, int width, const S kPMColor*) {

38 const uint16_t* SK_RESTRICT src = (const uint16_t*)in;

39 for (int i = 0; i < width; ++i) {

40 const uint16_t c = *src++;

41 argb[0] = 0xFF;

42 argb[1] = SkPacked16ToR32(c);

43 argb[2] = SkPacked16ToG32(c);

44 argb[3] = SkPacked16ToB32(c);

45 argb += 4;

46 }

47 }

48

49 static void ARGB_4444_To_ARGB(const uint8_t* in, uint8_t* argb, int width, const SkPMColor*) {

50 const SkPMColor16* SK_RESTRICT src = (const SkPMColor16*)in;

51 for (int i = 0; i < width; ++i) {

52 const SkPMColor16 c = *src++;

53 argb[0] = SkPacked4444ToA32(c);

54 argb[1] = SkPacked4444ToR32(c);

55 argb[2] = SkPacked4444ToG32(c);

56 argb[3] = SkPacked4444ToB32(c);

57 argb += 4;

58 }

59 }

60

61 static void Index8_To_ARGB(const uint8_t* in, uint8_t* argb, int width,

62 const SkPMColor* SK_RESTRICT ctable) {

63 const uint8_t* SK_RESTRICT src = (const uint8_t*)in;

64 for (int i = 0; i < width; ++i) {

65 const uint32_t c = ctable[*src++];

66 argb[0] = SkGetPackedA32(c);

67 argb[1] = SkGetPackedR32(c);

68 argb[2] = SkGetPackedG32(c);

69 argb[3] = SkGetPackedB32(c);

70 argb += 4;

71 }

72 }

73

74 static ScanlineImporter ChooseImporter(SkColorType ct) {

75 switch (ct) {

76 case kN32_SkColorType:

77 return ARGB_8888_To_ARGB;

78 case kRGB_565_SkColorType:

79 return RGB_565_To_ARGB;

80 case kARGB_4444_SkColorType:

81 return ARGB_4444_To_ARGB;

82 case kIndex_8_SkColorType:

83 return Index8_To_ARGB;

84 default:

85 return nullptr;

86 }

87 }

88

89 bool SkARGBImageEncoder::onEncode(SkWStream* stream, const SkBitmap& bitmap, int ) {

90 const ScanlineImporter scanline_import = ChooseImporter(bitmap.colorType());

91 if (nullptr == scanline_import) {

92 return false;

93 }

94

95 SkAutoLockPixels alp(bitmap);

96 const uint8_t* src = (uint8_t*)bitmap.getPixels();

97 if (nullptr == bitmap.getPixels()) {

98 return false;

99 }

100

101 const SkPMColor* colors = bitmap.getColorTable() ? bitmap.getColorTable()->r eadColors() : nullptr;

102

103 const int argbStride = bitmap.width() * 4;

104 SkAutoTDeleteArray<uint8_t> ada(new uint8_t[argbStride]);

105 uint8_t* argb = ada.get();

106 for (int y = 0; y < bitmap.height(); ++y) {

107 scanline_import(src + y * bitmap.rowBytes(), argb, bitmap.width(), color s);

108 stream->write(argb, argbStride);

109 }

110

111 return true;

112 }

113

114

115 ///////////////////////////////////////////////////////////////////////////////

116 DEFINE_ENCODER_CREATOR(ARGBImageEncoder);

117 ///////////////////////////////////////////////////////////////////////////////

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