fix wrong git ignore

internal/pdf/contentstream/utils.go

@@ -0,0 +1,90 @@
+package contentstream
+
+import (
+	"errors"
+
+	"gitea.tecamino.com/paadi/pdfmerge/internal/pdf/common"
+	"gitea.tecamino.com/paadi/pdfmerge/internal/pdf/core"
+	"gitea.tecamino.com/paadi/pdfmerge/internal/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(string(val)))
+	}
+	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)
+}