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Side by Side Diff: third_party/libwebp/enc/config.c

Issue 116213006: Update libwebp to 0.4.0 (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: After Blink Roll Created 6 years, 11 months ago
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1 // Copyright 2011 Google Inc. All Rights Reserved. 1 // Copyright 2011 Google Inc. All Rights Reserved.
2 // 2 //
3 // Use of this source code is governed by a BSD-style license 3 // Use of this source code is governed by a BSD-style license
4 // that can be found in the COPYING file in the root of the source 4 // that can be found in the COPYING file in the root of the source
5 // tree. An additional intellectual property rights grant can be found 5 // tree. An additional intellectual property rights grant can be found
6 // in the file PATENTS. All contributing project authors may 6 // in the file PATENTS. All contributing project authors may
7 // be found in the AUTHORS file in the root of the source tree. 7 // be found in the AUTHORS file in the root of the source tree.
8 // ----------------------------------------------------------------------------- 8 // -----------------------------------------------------------------------------
9 // 9 //
10 // Coding tools configuration 10 // Coding tools configuration
11 // 11 //
12 // Author: Skal (pascal.massimino@gmail.com) 12 // Author: Skal (pascal.massimino@gmail.com)
13 13
14 #include "../webp/encode.h" 14 #include "../webp/encode.h"
15 15
16 #if defined(__cplusplus) || defined(c_plusplus)
17 extern "C" {
18 #endif
19
20 //------------------------------------------------------------------------------ 16 //------------------------------------------------------------------------------
21 // WebPConfig 17 // WebPConfig
22 //------------------------------------------------------------------------------ 18 //------------------------------------------------------------------------------
23 19
24 int WebPConfigInitInternal(WebPConfig* config, 20 int WebPConfigInitInternal(WebPConfig* config,
25 WebPPreset preset, float quality, int version) { 21 WebPPreset preset, float quality, int version) {
26 if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_ENCODER_ABI_VERSION)) { 22 if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_ENCODER_ABI_VERSION)) {
27 return 0; // caller/system version mismatch! 23 return 0; // caller/system version mismatch!
28 } 24 }
29 if (config == NULL) return 0; 25 if (config == NULL) return 0;
30 26
31 config->quality = quality; 27 config->quality = quality;
32 config->target_size = 0; 28 config->target_size = 0;
33 config->target_PSNR = 0.; 29 config->target_PSNR = 0.;
34 config->method = 4; 30 config->method = 4;
35 config->sns_strength = 50; 31 config->sns_strength = 50;
36 config->filter_strength = 60; // rather high filtering, helps w/ gradients. 32 config->filter_strength = 60; // mid-filtering
37 config->filter_sharpness = 0; 33 config->filter_sharpness = 0;
38 config->filter_type = 1; // default: strong (so U/V is filtered too) 34 config->filter_type = 1; // default: strong (so U/V is filtered too)
39 config->partitions = 0; 35 config->partitions = 0;
40 config->segments = 4; 36 config->segments = 4;
41 config->pass = 1; 37 config->pass = 1;
42 config->show_compressed = 0; 38 config->show_compressed = 0;
43 config->preprocessing = 0; 39 config->preprocessing = 0;
44 config->autofilter = 0; 40 config->autofilter = 0;
45 config->partition_limit = 0; 41 config->partition_limit = 0;
46 config->alpha_compression = 1; 42 config->alpha_compression = 1;
47 config->alpha_filtering = 1; 43 config->alpha_filtering = 1;
48 config->alpha_quality = 100; 44 config->alpha_quality = 100;
49 config->lossless = 0; 45 config->lossless = 0;
50 config->image_hint = WEBP_HINT_DEFAULT; 46 config->image_hint = WEBP_HINT_DEFAULT;
51 config->emulate_jpeg_size = 0; 47 config->emulate_jpeg_size = 0;
52 config->thread_level = 0; 48 config->thread_level = 0;
53 config->low_memory = 0; 49 config->low_memory = 0;
54 50
55 // TODO(skal): tune. 51 // TODO(skal): tune.
56 switch (preset) { 52 switch (preset) {
57 case WEBP_PRESET_PICTURE: 53 case WEBP_PRESET_PICTURE:
58 config->sns_strength = 80; 54 config->sns_strength = 80;
59 config->filter_sharpness = 4; 55 config->filter_sharpness = 4;
60 config->filter_strength = 35; 56 config->filter_strength = 35;
57 config->preprocessing &= ~2; // no dithering
61 break; 58 break;
62 case WEBP_PRESET_PHOTO: 59 case WEBP_PRESET_PHOTO:
63 config->sns_strength = 80; 60 config->sns_strength = 80;
64 config->filter_sharpness = 3; 61 config->filter_sharpness = 3;
65 config->filter_strength = 30; 62 config->filter_strength = 30;
63 config->preprocessing |= 2;
66 break; 64 break;
67 case WEBP_PRESET_DRAWING: 65 case WEBP_PRESET_DRAWING:
68 config->sns_strength = 25; 66 config->sns_strength = 25;
69 config->filter_sharpness = 6; 67 config->filter_sharpness = 6;
70 config->filter_strength = 10; 68 config->filter_strength = 10;
71 break; 69 break;
72 case WEBP_PRESET_ICON: 70 case WEBP_PRESET_ICON:
73 config->sns_strength = 0; 71 config->sns_strength = 0;
74 config->filter_strength = 0; // disable filtering to retain sharpness 72 config->filter_strength = 0; // disable filtering to retain sharpness
73 config->preprocessing &= ~2; // no dithering
75 break; 74 break;
76 case WEBP_PRESET_TEXT: 75 case WEBP_PRESET_TEXT:
77 config->sns_strength = 0; 76 config->sns_strength = 0;
78 config->filter_strength = 0; // disable filtering to retain sharpness 77 config->filter_strength = 0; // disable filtering to retain sharpness
78 config->preprocessing &= ~2; // no dithering
79 config->segments = 2; 79 config->segments = 2;
80 break; 80 break;
81 case WEBP_PRESET_DEFAULT: 81 case WEBP_PRESET_DEFAULT:
82 default: 82 default:
83 break; 83 break;
84 } 84 }
85 return WebPValidateConfig(config); 85 return WebPValidateConfig(config);
86 } 86 }
87 87
88 int WebPValidateConfig(const WebPConfig* config) { 88 int WebPValidateConfig(const WebPConfig* config) {
(...skipping 15 matching lines...) Expand all
104 if (config->filter_sharpness < 0 || config->filter_sharpness > 7) 104 if (config->filter_sharpness < 0 || config->filter_sharpness > 7)
105 return 0; 105 return 0;
106 if (config->filter_type < 0 || config->filter_type > 1) 106 if (config->filter_type < 0 || config->filter_type > 1)
107 return 0; 107 return 0;
108 if (config->autofilter < 0 || config->autofilter > 1) 108 if (config->autofilter < 0 || config->autofilter > 1)
109 return 0; 109 return 0;
110 if (config->pass < 1 || config->pass > 10) 110 if (config->pass < 1 || config->pass > 10)
111 return 0; 111 return 0;
112 if (config->show_compressed < 0 || config->show_compressed > 1) 112 if (config->show_compressed < 0 || config->show_compressed > 1)
113 return 0; 113 return 0;
114 if (config->preprocessing < 0 || config->preprocessing > 1) 114 if (config->preprocessing < 0 || config->preprocessing > 3)
115 return 0; 115 return 0;
116 if (config->partitions < 0 || config->partitions > 3) 116 if (config->partitions < 0 || config->partitions > 3)
117 return 0; 117 return 0;
118 if (config->partition_limit < 0 || config->partition_limit > 100) 118 if (config->partition_limit < 0 || config->partition_limit > 100)
119 return 0; 119 return 0;
120 if (config->alpha_compression < 0) 120 if (config->alpha_compression < 0)
121 return 0; 121 return 0;
122 if (config->alpha_filtering < 0) 122 if (config->alpha_filtering < 0)
123 return 0; 123 return 0;
124 if (config->alpha_quality < 0 || config->alpha_quality > 100) 124 if (config->alpha_quality < 0 || config->alpha_quality > 100)
125 return 0; 125 return 0;
126 if (config->lossless < 0 || config->lossless > 1) 126 if (config->lossless < 0 || config->lossless > 1)
127 return 0; 127 return 0;
128 if (config->image_hint >= WEBP_HINT_LAST) 128 if (config->image_hint >= WEBP_HINT_LAST)
129 return 0; 129 return 0;
130 if (config->emulate_jpeg_size < 0 || config->emulate_jpeg_size > 1) 130 if (config->emulate_jpeg_size < 0 || config->emulate_jpeg_size > 1)
131 return 0; 131 return 0;
132 if (config->thread_level < 0 || config->thread_level > 1) 132 if (config->thread_level < 0 || config->thread_level > 1)
133 return 0; 133 return 0;
134 if (config->low_memory < 0 || config->low_memory > 1) 134 if (config->low_memory < 0 || config->low_memory > 1)
135 return 0; 135 return 0;
136 return 1; 136 return 1;
137 } 137 }
138 138
139 //------------------------------------------------------------------------------ 139 //------------------------------------------------------------------------------
140 140
141 #if defined(__cplusplus) || defined(c_plusplus)
142 } // extern "C"
143 #endif
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