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hold.go
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hold.go
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// Copyright © 2016 Abcum Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this info 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.
// go:build cgo
package pdf
import (
"io"
"io/ioutil"
"github.com/abcum/pdf/colour"
)
type Hold struct {
doc *Document
opt Options
ref int
}
func NewHold(doc *Document, r io.Reader, o Options) *Hold {
var err error
var res []byte
this := &Hold{
doc: doc,
opt: o,
}
name := uniq()
opts := o.cull(loadOptions)
if res, err = ioutil.ReadAll(r); err != nil {
panic(err)
}
if err = PDFLib.CreatePvf(name, res, "copy"); err != nil {
panic(err)
}
if this.ref, err = PDFLib.LoadImage("auto", name, opts); err != nil {
panic(err)
}
if err = PDFLib.DeletePvf(name); err != nil {
panic(err)
}
return this
}
func (this *Hold) Close() {
if err := PDFLib.CloseImage(this.ref); err != nil {
panic(err)
}
}
func (this *Hold) Place(x, y, w, h float64, o Options) *Hold {
opts := o.cull(imageOptions)
if val, ok := o["backgroundcolor"]; ok {
if col, ok := val.(*colour.Colour); ok {
k, v1, v2, v3, v4 := col.Output()
PDFLib.SetColor("fill", k, v1, v2, v3, v4)
PDFLib.Rect(x, y, w, h)
PDFLib.Fill()
}
}
if err := PDFLib.FitImage(this.ref, x, y, opts); err != nil {
panic(err)
}
return this
}