| // Copyright (C) 2016 The Android Open Source Project |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package image |
| |
| import ( |
| "bytes" |
| |
| "android.googlesource.com/platform/tools/gpu/framework/binary" |
| "android.googlesource.com/platform/tools/gpu/framework/binary/endian" |
| "android.googlesource.com/platform/tools/gpu/framework/device" |
| ) |
| |
| type fmtRedF16 struct{ binary.Generate } |
| |
| func (f *fmtRedF16) Key() interface{} { return *f } |
| func (*fmtRedF16) String() string { return "RedF16" } |
| func (*fmtRedF16) Size(w, h int) int { return w * h * 2 } |
| func (*fmtRedF16) Check(d []byte, w, h int) error { return checkSize(d, w, h, 16) } |
| |
| // RedF16 returns a format containing a single 16-bit floating point red channel |
| // per pixel. |
| func RedF16() Format { return &fmtRedF16{} } |
| |
| func init() { |
| RegisterConverter(RedF16(), RGBA(), |
| func(src []byte, width, height int) ([]byte, error) { |
| r := endian.Reader(bytes.NewBuffer(src), device.LittleEndian) |
| dst, i := make([]byte, width*height*4), 0 |
| for y := 0; y < height; y++ { |
| for x := 0; x < width; x++ { |
| dst[i+0], dst[i+1], dst[i+2], dst[i+3] = f16ToByte(r.Float16()), 0, 0, 255 |
| i += 4 |
| } |
| } |
| return dst, nil |
| }) |
| } |