20 int WebPConfigInitInternal(WebPConfig* config,  in WebPConfigInitInternal()  argument
25   if (config == NULL) return 0;  in WebPConfigInitInternal()
27   config->quality = quality;  in WebPConfigInitInternal()
28   config->target_size = 0;  in WebPConfigInitInternal()
29   config->target_PSNR = 0.;  in WebPConfigInitInternal()
30   config->method = 4;  in WebPConfigInitInternal()
31   config->sns_strength = 50;  in WebPConfigInitInternal()
32   config->filter_strength = 60;   // mid-filtering  in WebPConfigInitInternal()
33   config->filter_sharpness = 0;  in WebPConfigInitInternal()
34   config->filter_type = 1;        // default: strong (so U/V is filtered too)  in WebPConfigInitInternal()
35   config->partitions = 0;  in WebPConfigInitInternal()
36   config->segments = 4;  in WebPConfigInitInternal()
37   config->pass = 1;  in WebPConfigInitInternal()
38   config->show_compressed = 0;  in WebPConfigInitInternal()
39   config->preprocessing = 0;  in WebPConfigInitInternal()
40   config->autofilter = 0;  in WebPConfigInitInternal()
41   config->partition_limit = 0;  in WebPConfigInitInternal()
42   config->alpha_compression = 1;  in WebPConfigInitInternal()
43   config->alpha_filtering = 1;  in WebPConfigInitInternal()
44   config->alpha_quality = 100;  in WebPConfigInitInternal()
45   config->lossless = 0;  in WebPConfigInitInternal()
46   config->exact = 0;  in WebPConfigInitInternal()
47   config->image_hint = WEBP_HINT_DEFAULT;  in WebPConfigInitInternal()
48   config->emulate_jpeg_size = 0;  in WebPConfigInitInternal()
49   config->thread_level = 0;  in WebPConfigInitInternal()
50   config->low_memory = 0;  in WebPConfigInitInternal()
51   config->near_lossless = 100;  in WebPConfigInitInternal()
53   config->delta_palettization = 0;  in WebPConfigInitInternal()
59       config->sns_strength = 80;  in WebPConfigInitInternal()
60       config->filter_sharpness = 4;  in WebPConfigInitInternal()
61       config->filter_strength = 35;  in WebPConfigInitInternal()
62       config->preprocessing &= ~2;   // no dithering  in WebPConfigInitInternal()
65       config->sns_strength = 80;  in WebPConfigInitInternal()
66       config->filter_sharpness = 3;  in WebPConfigInitInternal()
67       config->filter_strength = 30;  in WebPConfigInitInternal()
68       config->preprocessing |= 2;  in WebPConfigInitInternal()
71       config->sns_strength = 25;  in WebPConfigInitInternal()
72       config->filter_sharpness = 6;  in WebPConfigInitInternal()
73       config->filter_strength = 10;  in WebPConfigInitInternal()
76       config->sns_strength = 0;  in WebPConfigInitInternal()
77       config->filter_strength = 0;   // disable filtering to retain sharpness  in WebPConfigInitInternal()
78       config->preprocessing &= ~2;   // no dithering  in WebPConfigInitInternal()
81       config->sns_strength = 0;  in WebPConfigInitInternal()
82       config->filter_strength = 0;   // disable filtering to retain sharpness  in WebPConfigInitInternal()
83       config->preprocessing &= ~2;   // no dithering  in WebPConfigInitInternal()
84       config->segments = 2;  in WebPConfigInitInternal()
90   return WebPValidateConfig(config);  in WebPConfigInitInternal()
93 int WebPValidateConfig(const WebPConfig* config) {  in WebPValidateConfig()  argument
94   if (config == NULL) return 0;  in WebPValidateConfig()
95   if (config->quality < 0 || config->quality > 100)  in WebPValidateConfig()
97   if (config->target_size < 0)  in WebPValidateConfig()
99   if (config->target_PSNR < 0)  in WebPValidateConfig()
101   if (config->method < 0 || config->method > 6)  in WebPValidateConfig()
103   if (config->segments < 1 || config->segments > 4)  in WebPValidateConfig()
105   if (config->sns_strength < 0 || config->sns_strength > 100)  in WebPValidateConfig()
107   if (config->filter_strength < 0 || config->filter_strength > 100)  in WebPValidateConfig()
109   if (config->filter_sharpness < 0 || config->filter_sharpness > 7)  in WebPValidateConfig()
111   if (config->filter_type < 0 || config->filter_type > 1)  in WebPValidateConfig()
113   if (config->autofilter < 0 || config->autofilter > 1)  in WebPValidateConfig()
115   if (config->pass < 1 || config->pass > 10)  in WebPValidateConfig()
117   if (config->show_compressed < 0 || config->show_compressed > 1)  in WebPValidateConfig()
119   if (config->preprocessing < 0 || config->preprocessing > 7)  in WebPValidateConfig()
121   if (config->partitions < 0 || config->partitions > 3)  in WebPValidateConfig()
123   if (config->partition_limit < 0 || config->partition_limit > 100)  in WebPValidateConfig()
125   if (config->alpha_compression < 0)  in WebPValidateConfig()
127   if (config->alpha_filtering < 0)  in WebPValidateConfig()
129   if (config->alpha_quality < 0 || config->alpha_quality > 100)  in WebPValidateConfig()
131   if (config->lossless < 0 || config->lossless > 1)  in WebPValidateConfig()
133   if (config->near_lossless < 0 || config->near_lossless > 100)  in WebPValidateConfig()
135   if (config->image_hint >= WEBP_HINT_LAST)  in WebPValidateConfig()
137   if (config->emulate_jpeg_size < 0 || config->emulate_jpeg_size > 1)  in WebPValidateConfig()
139   if (config->thread_level < 0 || config->thread_level > 1)  in WebPValidateConfig()
141   if (config->low_memory < 0 || config->low_memory > 1)  in WebPValidateConfig()
143   if (config->exact < 0 || config->exact > 1)  in WebPValidateConfig()
146   if (config->delta_palettization < 0 || config->delta_palettization > 1)  in WebPValidateConfig()
165 int WebPConfigLosslessPreset(WebPConfig* config, int level) {  in WebPConfigLosslessPreset()  argument
166   if (config == NULL || level < 0 || level > MAX_LEVEL) return 0;  in WebPConfigLosslessPreset()
167   config->lossless = 1;  in WebPConfigLosslessPreset()
168   config->method = kLosslessPresets[level].method_;  in WebPConfigLosslessPreset()
169   config->quality = kLosslessPresets[level].quality_;  in WebPConfigLosslessPreset()