gabehf/talgo-libwebp
1
0
Fork 0
mirror of https://github.com/talgo-cloud/talgo-libwebp.git synced 2026-03-15 18:25:59 -07:00
Code Issues Projects Releases Packages Wiki Activity Actions

Update comments

Browse source
This commit is contained in:
harukasan 2015-01-09 18:01:51 +09:00
parent c356a8c12f
commit fab8f03740
5 changed files with 28 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

28
webp/decode.go
View file

@ -17,19 +17,20 @@ import (
"unsafe"
)
// DecoderOptions specifies decoding options
// DecoderOptions specifies decoding options of WebP.
type DecoderOptions struct {
BypassFiltering bool
NoFancyUpsampling bool
Crop image.Rectangle
Scale image.Rectangle
UseThreads bool
DitheringStrength int
Flip bool
AlphaDitheringStrength int
BypassFiltering bool // If true, bypass filtering process
NoFancyUpsampling bool // If true, do not fancy upsampling
Crop image.Rectangle // Do cropping if image.Rectangle is not empty.
Scale image.Rectangle // Do scaling if image.Rectangle is not empty.
UseThreads bool // If true, use multi threads
DitheringStrength int // Specify dithering strength [0=Off .. 100=full]
Flip bool // If true, flip output vertically
AlphaDitheringStrength int // Specify alpha dithering strength in [0..100]
}
// BitstreamFeatures retrived from data stream.
// BitstreamFeatures represents the image properties which are retrived from
// data stream.
type BitstreamFeatures struct {
Width int // Image width in pixels
Height int // Image height in pixles
@ -52,7 +53,7 @@ func GetInfo(data []byte) (width, height int) {
return int(w), int(h)
}
// GetFeatures returns features retrived from data stream.
// GetFeatures returns features as BitstreamFeatures retrived from data stream.
func GetFeatures(data []byte) (f *BitstreamFeatures, err error) {
var cf C.WebPBitstreamFeatures
status := C.WebPGetFeatures((*C.uint8_t)(&data[0]), (C.size_t)(len(data)), &cf)
@ -72,7 +73,8 @@ func GetFeatures(data []byte) (f *BitstreamFeatures, err error) {
return
}
// DecodeYUVA decodes WebP image into YUV image with alpha channel.
// DecodeYUVA decodes WebP image into YUV image with alpha channel, and returns
// it as *YUVAImage.
func DecodeYUVA(data []byte, options *DecoderOptions) (img *YUVAImage, err error) {
config, err := initDecoderConfig(options)
if err != nil {
@ -127,7 +129,7 @@ func DecodeYUVA(data []byte, options *DecoderOptions) (img *YUVAImage, err error
return
}
// DecodeRGBA decodes WebP image into RGBA image.
// DecodeRGBA decodes WebP image into RGBA image and returns it as an *image.RGBA.
func DecodeRGBA(data []byte, options *DecoderOptions) (img *image.RGBA, err error) {
config, err := initDecoderConfig(options)
if err != nil {