initial commit

webp/webp.go

@@ -0,0 +1,48 @@
+package webp
+
+/*
+#cgo LDFLAGS: -lwebp
+
+#include <stdlib.h>
+#include <webp/encode.h>
+
+*/
+import "C"
+
+// ColorSpace represents encoding color space in WebP
+type ColorSpace int
+
+const (
+	// YUV420 specifies YUV4:2:0
+	YUV420 ColorSpace = C.WEBP_YUV420
+	// YUV420A specifies YUV4:2:0 with alpha channel
+	YUV420A ColorSpace = C.WEBP_YUV420A
+)
+
+// Preset corresponds to C.WebPPreset
+type Preset int
+
+const (
+	// PresetDefault corresponds to WEBP_PRESET_DEFAULT, for default preset.
+	PresetDefault Preset = C.WEBP_PRESET_DEFAULT
+	// PresetPicture corresponds to WEBP_PRESET_PICTURE, for digital picture, like portrait, inner shot
+	PresetPicture Preset = C.WEBP_PRESET_PICTURE
+	// PresetPhoto corresponds to WEBP_PRESET_PHOTO, for outdoor photograph, with natural lighting
+	PresetPhoto Preset = C.WEBP_PRESET_PHOTO
+	// PresetDrawing corresponds to WEBP_PRESET_DRAWING, for hand or line drawing, with high-contrast details
+	PresetDrawing Preset = C.WEBP_PRESET_DRAWING
+	// PresetIcon corresponds to WEBP_PRESET_ICON, for small-sized colorful images
+	PresetIcon Preset = C.WEBP_PRESET_ICON
+	// PresetText corresponds to WEBP_PRESET_TEXT, for text-like
+	PresetText Preset = C.WEBP_PRESET_TEXT
+)
+
+// FilterType corresponds to filter types in compression parameters.
+type FilterType int
+
+const (
+	// SimpleFilter (=0, default)
+	SimpleFilter FilterType = iota
+	// StrongFilter (=1)
+	StrongFilter
+)