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

     1  /*
     2  Copyright 2024 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  	"path/filepath"
    21  	"testing"
    22  
    23  	"github.com/pdfcpu/pdfcpu/pkg/api"
    24  	"github.com/pdfcpu/pdfcpu/pkg/pdfcpu"
    25  	"github.com/pdfcpu/pdfcpu/pkg/pdfcpu/types"
    26  )
    27  
    28  func TestZoomInByFactor(t *testing.T) {
    29  	msg := "TestZoomInByFactor"
    30  
    31  	inFile := filepath.Join(inDir, "test.pdf")
    32  
    33  	zoom, err := pdfcpu.ParseZoomConfig("factor:2", types.POINTS)
    34  	if err != nil {
    35  		t.Fatalf("%s invalid zoom configuration: %v\n", msg, err)
    36  	}
    37  	outFile := filepath.Join(samplesDir, "zoom", "zoomInByFactor2.pdf")
    38  	if err := api.ZoomFile(inFile, outFile, nil, zoom, nil); err != nil {
    39  		t.Fatalf("%s zoom: %v\n", msg, err)
    40  	}
    41  
    42  	zoom, err = pdfcpu.ParseZoomConfig("factor:4", types.POINTS)
    43  	if err != nil {
    44  		t.Fatalf("%s invalid zoom configuration: %v\n", msg, err)
    45  	}
    46  	outFile = filepath.Join(samplesDir, "zoom", "zoomInByFactor4.pdf")
    47  	if err := api.ZoomFile(inFile, outFile, nil, zoom, nil); err != nil {
    48  		t.Fatalf("%s zoom: %v\n", msg, err)
    49  	}
    50  }
    51  
    52  func TestZoomOutByFactor(t *testing.T) {
    53  	msg := "TestZoomOutByFactor"
    54  
    55  	inFile := filepath.Join(inDir, "test.pdf")
    56  
    57  	zoom, err := pdfcpu.ParseZoomConfig("factor:.5", types.POINTS)
    58  	if err != nil {
    59  		t.Fatalf("%s invalid zoom configuration: %v\n", msg, err)
    60  	}
    61  	outFile := filepath.Join(samplesDir, "zoom", "zoomOutByFactor05.pdf")
    62  	if err := api.ZoomFile(inFile, outFile, nil, zoom, nil); err != nil {
    63  		t.Fatalf("%s zoom: %v\n", msg, err)
    64  	}
    65  
    66  	zoom, err = pdfcpu.ParseZoomConfig("factor:.25, border:true", types.POINTS)
    67  	if err != nil {
    68  		t.Fatalf("%s invalid zoom configuration: %v\n", msg, err)
    69  	}
    70  	outFile = filepath.Join(samplesDir, "zoom", "zoomOutByFactor025.pdf")
    71  	if err := api.ZoomFile(inFile, outFile, nil, zoom, nil); err != nil {
    72  		t.Fatalf("%s zoom: %v\n", msg, err)
    73  	}
    74  }
    75  
    76  func TestZoomOutByHorizontalMargin(t *testing.T) {
    77  	// Zoom out of page content resulting in a preferred horizontal margin.
    78  	msg := "TestZoomOutByHMargin"
    79  	inFile := filepath.Join(inDir, "test.pdf")
    80  
    81  	zoom, err := pdfcpu.ParseZoomConfig("hmargin:149", types.POINTS)
    82  	if err != nil {
    83  		t.Fatalf("%s invalid zoom configuration: %v\n", msg, err)
    84  	}
    85  	outFile := filepath.Join(samplesDir, "zoom", "zoomOutByHMarginPoints.pdf")
    86  	if err := api.ZoomFile(inFile, outFile, nil, zoom, nil); err != nil {
    87  		t.Fatalf("%s zoom: %v\n", msg, err)
    88  	}
    89  
    90  	zoom, err = pdfcpu.ParseZoomConfig("hmargin:1, border:true, bgcol:lightgray", types.CENTIMETRES)
    91  	if err != nil {
    92  		t.Fatalf("%s invalid zoom configuration: %v\n", msg, err)
    93  	}
    94  	outFile = filepath.Join(samplesDir, "zoom", "zoomOutByHMarginCm.pdf")
    95  	if err := api.ZoomFile(inFile, outFile, nil, zoom, nil); err != nil {
    96  		t.Fatalf("%s zoom: %v\n", msg, err)
    97  	}
    98  }
    99  
   100  func TestZoomOutByVerticalMargin(t *testing.T) {
   101  	// Zoom out of page content resulting in a preferred vertical margin.
   102  	msg := "TestZoomOutByVMargin"
   103  	inFile := filepath.Join(inDir, "test.pdf")
   104  
   105  	zoom, err := pdfcpu.ParseZoomConfig("vmargin:1", types.INCHES)
   106  	if err != nil {
   107  		t.Fatalf("%s invalid zoom configuration: %v\n", msg, err)
   108  	}
   109  	outFile := filepath.Join(samplesDir, "zoom", "zoomOutByVMarginInches.pdf")
   110  	if err := api.ZoomFile(inFile, outFile, nil, zoom, nil); err != nil {
   111  		t.Fatalf("%s zoom: %v\n", msg, err)
   112  	}
   113  
   114  	zoom, err = pdfcpu.ParseZoomConfig("vmargin:30, border:false, bgcol:lightgray", types.MILLIMETRES)
   115  	if err != nil {
   116  		t.Fatalf("%s invalid zoom configuration: %v\n", msg, err)
   117  	}
   118  	outFile = filepath.Join(samplesDir, "zoom", "zoomOutByVMarginMm.pdf")
   119  	if err := api.ZoomFile(inFile, outFile, nil, zoom, nil); err != nil {
   120  		t.Fatalf("%s zoom: %v\n", msg, err)
   121  	}
   122  }