mirror of
https://github.com/unidoc/unipdf.git
synced 2025-04-27 13:48:51 +08:00
14ee80e1fe
Refactored PdfObjectString into a struct with bool flag for hex. Fixed any code broken by the change. Unexported non-essential functions for crypto (not used by model). Can unexport more later or refactor to internal package.
96 lines
2.7 KiB
Go
96 lines
2.7 KiB
Go
/*
|
|
* This file is subject to the terms and conditions defined in
|
|
* file 'LICENSE.md', which is part of this source code package.
|
|
*/
|
|
|
|
package contentstream
|
|
|
|
import (
|
|
"errors"
|
|
|
|
"github.com/unidoc/unidoc/common"
|
|
"github.com/unidoc/unidoc/pdf/core"
|
|
"github.com/unidoc/unidoc/pdf/model"
|
|
)
|
|
|
|
func makeParamsFromFloats(vals []float64) []core.PdfObject {
|
|
params := []core.PdfObject{}
|
|
for _, val := range vals {
|
|
params = append(params, core.MakeFloat(val))
|
|
}
|
|
return params
|
|
}
|
|
|
|
func makeParamsFromNames(vals []core.PdfObjectName) []core.PdfObject {
|
|
params := []core.PdfObject{}
|
|
for _, val := range vals {
|
|
params = append(params, core.MakeName(string(val)))
|
|
}
|
|
return params
|
|
}
|
|
|
|
func makeParamsFromStrings(vals []core.PdfObjectString) []core.PdfObject {
|
|
params := []core.PdfObject{}
|
|
for _, val := range vals {
|
|
params = append(params, core.MakeString(val.Str()))
|
|
}
|
|
return params
|
|
}
|
|
|
|
func makeParamsFromInts(vals []int64) []core.PdfObject {
|
|
params := []core.PdfObject{}
|
|
for _, val := range vals {
|
|
params = append(params, core.MakeInteger(val))
|
|
}
|
|
return params
|
|
}
|
|
|
|
func newIndexedColorspaceFromPdfObject(obj core.PdfObject) (model.PdfColorspace, error) {
|
|
arr, ok := obj.(*core.PdfObjectArray)
|
|
if !ok {
|
|
common.Log.Debug("Error: Invalid indexed cs not in array (%#v)", obj)
|
|
return nil, errors.New("Type check error")
|
|
}
|
|
|
|
if len(*arr) != 4 {
|
|
common.Log.Debug("Error: Invalid cs array, length != 4 (%d)", len(*arr))
|
|
return nil, errors.New("Range check error")
|
|
}
|
|
|
|
// Format is [/I base 255 bytes], where base = /G,/RGB,/CMYK
|
|
name, ok := (*arr)[0].(*core.PdfObjectName)
|
|
if !ok {
|
|
common.Log.Debug("Error: Invalid cs array first element not a name (array: %#v)", *arr)
|
|
return nil, errors.New("Type check error")
|
|
}
|
|
if *name != "I" && *name != "Indexed" {
|
|
common.Log.Debug("Error: Invalid cs array first element != I (got: %v)", *name)
|
|
return nil, errors.New("Range check error")
|
|
}
|
|
|
|
// Check base
|
|
name, ok = (*arr)[1].(*core.PdfObjectName)
|
|
if !ok {
|
|
common.Log.Debug("Error: Invalid cs array 2nd element not a name (array: %#v)", *arr)
|
|
return nil, errors.New("Type check error")
|
|
}
|
|
if *name != "G" && *name != "RGB" && *name != "CMYK" && *name != "DeviceGray" && *name != "DeviceRGB" && *name != "DeviceCMYK" {
|
|
common.Log.Debug("Error: Invalid cs array 2nd element != G/RGB/CMYK (got: %v)", *name)
|
|
return nil, errors.New("Range check error")
|
|
}
|
|
basename := ""
|
|
switch *name {
|
|
case "G", "DeviceGray":
|
|
basename = "DeviceGray"
|
|
case "RGB", "DeviceRGB":
|
|
basename = "DeviceRGB"
|
|
case "CMYK", "DeviceCMYK":
|
|
basename = "DeviceCMYK"
|
|
}
|
|
|
|
// Prepare to a format that can be loaded by model's newPdfColorspaceFromPdfObject.
|
|
csArr := core.MakeArray(core.MakeName("Indexed"), core.MakeName(basename), (*arr)[2], (*arr)[3])
|
|
|
|
return model.NewPdfColorspaceFromPdfObject(csArr)
|
|
}
|