github.com/pdfcpu/pdfcpu@v0.11.1/pkg/api/test/importImages_test.go (about)

     1  /*
     2  Copyright 2020 The pdf Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8  	http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package test
    18  
    19  import (
    20  	"bufio"
    21  	"bytes"
    22  	"io"
    23  	"os"
    24  	"path/filepath"
    25  	"testing"
    26  
    27  	"github.com/pdfcpu/pdfcpu/pkg/api"
    28  	"github.com/pdfcpu/pdfcpu/pkg/pdfcpu"
    29  	"github.com/pdfcpu/pdfcpu/pkg/pdfcpu/types"
    30  )
    31  
    32  func testImportImages(t *testing.T, msg string, imgFiles []string, outFile, impConf string) {
    33  	t.Helper()
    34  	var err error
    35  
    36  	// The default import conf uses the special pos:full argument
    37  	// which overrides all other import conf parms.
    38  	imp := pdfcpu.DefaultImportConfig()
    39  	if impConf != "" {
    40  		if imp, err = api.Import(impConf, types.POINTS); err != nil {
    41  			t.Fatalf("%s %s: %v\n", msg, outFile, err)
    42  		}
    43  	}
    44  	if err := api.ImportImagesFile(imgFiles, outFile, imp, nil); err != nil {
    45  		t.Fatalf("%s %s: %v\n", msg, outFile, err)
    46  	}
    47  	if err := api.ValidateFile(outFile, nil); err != nil {
    48  		t.Fatalf("%s: %v\n", msg, err)
    49  	}
    50  }
    51  
    52  func TestImportImages(t *testing.T) {
    53  
    54  	outDir := filepath.Join(samplesDir, "import")
    55  
    56  	testFile1 := filepath.Join(outDir, "CenteredGraySepia.pdf")
    57  	os.Remove(testFile1)
    58  
    59  	testFile2 := filepath.Join(outDir, "Full.pdf")
    60  	os.Remove(testFile2)
    61  
    62  	for _, tt := range []struct {
    63  		msg      string
    64  		imgFiles []string
    65  		outFile  string
    66  		impConf  string
    67  	}{
    68  		// Render image on an A4 portrait mode page.
    69  		{"TestCenteredGraySepia",
    70  			[]string{filepath.Join(resDir, "mountain.jpg")},
    71  			testFile1,
    72  			"f:A4, pos:c, bgcol:#beded9"},
    73  
    74  		// Import another image as a new page of testfile1 and convert image to gray.
    75  		{"TestCenteredGraySepia",
    76  			[]string{filepath.Join(resDir, "mountain.png")},
    77  			testFile1,
    78  			"f:A4, pos:c, sc:.75, bgcol:#beded9, gray:true"},
    79  
    80  		// Import another image as a new page of testfile1 and apply a sepia filter.
    81  		{"TestCenteredGraySepia",
    82  			[]string{filepath.Join(resDir, "mountain.webp")},
    83  			testFile1,
    84  			"f:A4, pos:c, sc:.9, bgcol:#beded9, sepia:true"},
    85  
    86  		// Import another image as a new page of testfile1.
    87  		{"TestCenteredGraySepia",
    88  			[]string{filepath.Join(resDir, "mountain.tif")},
    89  			testFile1,
    90  			"f:A4, pos:c, sc:1, bgcol:#beded9"},
    91  
    92  		// Page dimensions match image dimensions.
    93  		{"TestFull",
    94  			imageFileNames(t, resDir),
    95  			testFile2,
    96  			"pos:full"},
    97  	} {
    98  		testImportImages(t, tt.msg, tt.imgFiles, tt.outFile, tt.impConf)
    99  	}
   100  }
   101  
   102  func TestMemBasedWriterPanic(t *testing.T) {
   103  
   104  	imgFiles := []string{filepath.Join(resDir, "logoSmall.png")}
   105  
   106  	rr := make([]io.Reader, len(imgFiles))
   107  	for i, fn := range imgFiles {
   108  		f, err := os.Open(fn)
   109  		if err != nil {
   110  			t.Fatal(err)
   111  		}
   112  		rr[i] = bufio.NewReader(f)
   113  	}
   114  
   115  	outBuf := &bytes.Buffer{}
   116  
   117  	if err := api.ImportImages(nil, outBuf, rr, nil, nil); err != nil {
   118  		t.Fatal(err)
   119  	}
   120  
   121  }