1 // Copyright 2011 Google Inc. All Rights Reserved.
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
5 // tree. An additional intellectual property rights grant can be found
6 // in the file PATENTS. All contributing project authors may
7 // be found in the AUTHORS file in the root of the source tree.
8 // -----------------------------------------------------------------------------
10 // Coding tools configuration
12 // Author: Skal (pascal.massimino@gmail.com)
14 #include "../webp/encode.h"
16 #if defined(__cplusplus) || defined(c_plusplus)
20 //------------------------------------------------------------------------------
22 //------------------------------------------------------------------------------
24 int WebPConfigInitInternal(WebPConfig* config,
25 WebPPreset preset, float quality, int version) {
26 if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_ENCODER_ABI_VERSION)) {
27 return 0; // caller/system version mismatch!
29 if (config == NULL) return 0;
31 config->quality = quality;
32 config->target_size = 0;
33 config->target_PSNR = 0.;
35 config->sns_strength = 50;
36 config->filter_strength = 60; // rather high filtering, helps w/ gradients.
37 config->filter_sharpness = 0;
38 config->filter_type = 1; // default: strong (so U/V is filtered too)
39 config->partitions = 0;
42 config->show_compressed = 0;
43 config->preprocessing = 0;
44 config->autofilter = 0;
45 config->partition_limit = 0;
46 config->alpha_compression = 1;
47 config->alpha_filtering = 1;
48 config->alpha_quality = 100;
50 config->image_hint = WEBP_HINT_DEFAULT;
51 config->emulate_jpeg_size = 0;
52 config->thread_level = 0;
53 config->low_memory = 0;
57 case WEBP_PRESET_PICTURE:
58 config->sns_strength = 80;
59 config->filter_sharpness = 4;
60 config->filter_strength = 35;
62 case WEBP_PRESET_PHOTO:
63 config->sns_strength = 80;
64 config->filter_sharpness = 3;
65 config->filter_strength = 30;
67 case WEBP_PRESET_DRAWING:
68 config->sns_strength = 25;
69 config->filter_sharpness = 6;
70 config->filter_strength = 10;
72 case WEBP_PRESET_ICON:
73 config->sns_strength = 0;
74 config->filter_strength = 0; // disable filtering to retain sharpness
76 case WEBP_PRESET_TEXT:
77 config->sns_strength = 0;
78 config->filter_strength = 0; // disable filtering to retain sharpness
81 case WEBP_PRESET_DEFAULT:
85 return WebPValidateConfig(config);
88 int WebPValidateConfig(const WebPConfig* config) {
89 if (config == NULL) return 0;
90 if (config->quality < 0 || config->quality > 100)
92 if (config->target_size < 0)
94 if (config->target_PSNR < 0)
96 if (config->method < 0 || config->method > 6)
98 if (config->segments < 1 || config->segments > 4)
100 if (config->sns_strength < 0 || config->sns_strength > 100)
102 if (config->filter_strength < 0 || config->filter_strength > 100)
104 if (config->filter_sharpness < 0 || config->filter_sharpness > 7)
106 if (config->filter_type < 0 || config->filter_type > 1)
108 if (config->autofilter < 0 || config->autofilter > 1)
110 if (config->pass < 1 || config->pass > 10)
112 if (config->show_compressed < 0 || config->show_compressed > 1)
114 if (config->preprocessing < 0 || config->preprocessing > 1)
116 if (config->partitions < 0 || config->partitions > 3)
118 if (config->partition_limit < 0 || config->partition_limit > 100)
120 if (config->alpha_compression < 0)
122 if (config->alpha_filtering < 0)
124 if (config->alpha_quality < 0 || config->alpha_quality > 100)
126 if (config->lossless < 0 || config->lossless > 1)
128 if (config->image_hint >= WEBP_HINT_LAST)
130 if (config->emulate_jpeg_size < 0 || config->emulate_jpeg_size > 1)
132 if (config->thread_level < 0 || config->thread_level > 1)
134 if (config->low_memory < 0 || config->low_memory > 1)
139 //------------------------------------------------------------------------------
141 #if defined(__cplusplus) || defined(c_plusplus)