Code samples for PDF to Image Converter
Product update
This product has been replaced by the Pdftools SDK.
PDF to Image Converter lets you transform PDF documents into single page or multi-page raster images such as TIFF or JPEG. Here you'll find some examples of how to integrate the code in your development.
Basic Conversion
Convert PDF to JPEG
1// Create the converter
2pConverter = Pdf2ImgCreateObject();
3
4// Open input file
5if (!Pdf2ImgOpen(pConverter, szInputPath, _T("")))
6{
7 _tprintf(_T("Input file %s cannot be opened. %s (ErrorCode: 0x%08x).\n"), szOutputPath, Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
8 iReturnValue = 1;
9 goto cleanup;
10}
11
12// Set image quality
13Pdf2ImgSetImageQuality(pConverter, iQuality);
14
15// Loop over all pages of input file and create each time a new JPEG
16for (int iPage = 1; iPage <= Pdf2ImgGetPageCount(pConverter); iPage++)
17{
18 // Change file name and extension
19 _tcstok(szOutputPath, _T("."));
20 _stprintf(szImagePath, _T("%s%d.jpg"), szOutputPath, iPage);
21
22 // Create output JPEG
23 if (!Pdf2ImgCreateImage(pConverter, szImagePath))
24 {
25 _tprintf(_T("Output image %s cannot be created. %s (ErrorCode: 0x%08x).\n"), szInputPath, Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
26 iReturnValue = 1;
27 goto cleanup;
28 }
29
30 // Render page from PDF to output JPEG
31 if (!Pdf2ImgRenderPage(pConverter, iPage))
32 {
33 _tprintf(_T("Page %d of PDF %s could not be rendered to JPEG %s. %s (ErrorCode: 0x%08x).\n"), iPage, szInputPath, szImagePath, Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
34 iReturnValue = 1;
35 goto cleanup;
36 }
37
38 // Close output image
39 if (!Pdf2ImgCloseImage(pConverter))
40 {
41 _tprintf(_T("Output image %s cannot be closed. %s (ErrorCode: 0x%08x).\n"), szImagePath, Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
42 iReturnValue = 1;
43 goto cleanup;
44 }
45}
461// Create the converter
2using (Converter converter = new Converter())
3{
4 // Open input file
5 if (!converter.Open(inputPath, ""))
6 throw new Exception(String.Format("Input file {0} cannot be opened. " +
7 "{1} (ErrorCode: 0x{2:x}).", inputPath, converter.ErrorMessage, converter.ErrorCode));
8
9 // Set image quality
10 converter.ImageQuality = quality;
11
12 // Loop over all pages of input file and create each time a new JPEG.
13 for (int pageNo = 1; pageNo <= converter.PageCount; pageNo++)
14 {
15 string imagePath = Path.ChangeExtension(outputPath, null) + pageNo.ToString() + ".jpg";
16
17 // Create output JPEG
18 if (!converter.CreateImage(imagePath))
19 throw new Exception(String.Format("Output image {0} cannot be created. {1} " +
20 "(ErrorCode: 0x{2:x}).", imagePath, converter.ErrorMessage,
21 converter.ErrorCode));
22
23 // Render page from PDF to output JPEG
24 if (!converter.RenderPage(pageNo))
25 throw new Exception(String.Format("Page {0} of PDF {1} could not be rendered to " +
26 "JPEG {2}. {3} (ErrorCode: 0x{4:x}).", pageNo, inputPath, imagePath,
27 converter.ErrorMessage, converter.ErrorCode));
28
29 // Close output image
30 if (!converter.CloseImage())
31 throw new Exception(String.Format("Output image {0} cannot be closed. {1} " +
32 "(ErrorCode: 0x{2:x}).", imagePath, converter.ErrorMessage, converter.ErrorCode));
33 }
34}
351// Create the converter
2converter = new Pdf2Img();
3
4// Open input file
5if (!converter.open(inputPath, ""))
6 throw new IOException(String.format("Input file %s cannot be opened. %s (ErrorCode: 0x%08x).",
7 inputPath, converter.getErrorMessage(), converter.getErrorCode()));
8
9converter.setImageQuality(quality);
10
11// Loop over all pages of input file and create each time a new JPEG
12for (int pageNo = 1; pageNo <= converter.getPageCount(); pageNo++)
13{
14 // Construct path of output image in case of a multi-page input PDF
15 String imagePath = outputPath.substring(0, outputPath.lastIndexOf(".")) + pageNo + ".jpg";
16
17 // Create output JPEG
18 if (!converter.createImage(imagePath))
19 throw new IOException(String.format("Output image %s cannot be created. " +
20 "%s (ErrorCode: 0x%08x).", imagePath, converter.getErrorMessage(),
21 converter.getErrorCode()));
22
23 // Render page from PDF to output JPEG
24 if (!converter.renderPage(pageNo))
25 throw new IOException(String.format("Page %d of PDF %d could not be rendered to JPEG %s. " +
26 "%s (ErrorCode: 0x%08x).", pageNo, inputPath, imagePath, converter.getErrorMessage(),
27 converter.getErrorCode()));
28
29 // Close output image
30 if (!converter.closeImage())
31 throw new IOException(String.format("Output image %s cannot be closed. %s " +
32 "(ErrorCode: 0x%08x).", imagePath, converter.getErrorMessage(),
33 converter.getErrorCode()));
34}
35Convert PDF to PNG
1// Create the converter
2pConverter = Pdf2ImgCreateObject();
3
4// Open input file
5if (!Pdf2ImgOpen(pConverter, szInputPath, _T("")))
6{
7 _tprintf(_T("Input file %s cannot be opened. %s (ErrorCode: 0x%08x).\n"), szOutputPath, Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
8 iReturnValue = 1;
9 goto cleanup;
10}
11
12// Loop over all pages of input file and create each time a new PNG
13for (int iPage = 1; iPage <= Pdf2ImgGetPageCount(pConverter); iPage++)
14{
15 // Change file name and extension
16 _tcstok(szOutputPath, _T("."));
17 _stprintf(szImagePath, _T("%s%d.png"), szOutputPath, iPage);
18
19 // Create output PNG
20 if (!Pdf2ImgCreateImage(pConverter, szImagePath))
21 {
22 _tprintf(_T("Output image %s cannot be created. %s (ErrorCode: 0x%08x).\n"), szImagePath, Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
23 iReturnValue = 1;
24 goto cleanup;
25 }
26
27 // Render page from PDF to output PNG
28 if (!Pdf2ImgRenderPage(pConverter, iPage))
29 {
30 _tprintf(_T("Page %d of PDF %s could not be rendered to PNG %s. %s (ErrorCode: 0x%08x).\n"), iPage, szInputPath, szImagePath, Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
31 iReturnValue = 1;
32 goto cleanup;
33 }
34
35 // Close output image
36 if (!Pdf2ImgCloseImage(pConverter))
37 {
38 _tprintf(_T("Output image %s cannot be closed. %s (ErrorCode: 0x%08x).\n"), szImagePath, Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
39 iReturnValue = 1;
40 goto cleanup;
41 }
42}
431// Create the converter
2using (Converter converter = new Converter())
3{
4 // Open input file
5 if (!converter.Open(inputPath, ""))
6 throw new Exception(String.Format("Input file {0} cannot be opened. " +
7 "{1} (ErrorCode: 0x{2:x}).", inputPath, converter.ErrorMessage, converter.ErrorCode));
8
9 // Loop over all pages of input file and create each time a new PNG.
10 for (int pageNo = 1; pageNo <= converter.PageCount; pageNo++)
11 {
12 string imagePath = Path.ChangeExtension(outputPath, null) + pageNo.ToString() + ".png";
13
14 // Create output PNG
15 if (!converter.CreateImage(imagePath))
16 throw new Exception(String.Format("Output image {0} cannot be created. {1} " +
17 "(ErrorCode: 0x{2:x}).", imagePath, converter.ErrorMessage, converter.ErrorCode));
18
19 // Render page from PDF to output PNG
20 if (!converter.RenderPage(pageNo))
21 throw new Exception(String.Format("Page {0} of PDF {1} could not be rendered to " +
22 "PNG {2}. {3} (ErrorCode: 0x{4:x}).", pageNo, inputPath, imagePath,
23 converter.ErrorMessage, converter.ErrorCode));
24
25 // Close output image
26 if (!converter.CloseImage())
27 throw new Exception(String.Format("Output image {0} cannot be closed. {1} " +
28 "(ErrorCode: 0x{2:x}).", imagePath, converter.ErrorMessage, converter.ErrorCode));
29 }
30}
311// Create the converter
2converter = new Pdf2Img();
3
4// Open input file
5if (!converter.open(inputPath, ""))
6 throw new IOException(String.format("Input file %s cannot be opened. %s (ErrorCode: 0x%08x).",
7 inputPath, converter.getErrorMessage(), converter.getErrorCode()));
8
9// Loop over all pages of input file and create each time a new PNG
10for (int pageNo = 1; pageNo <= converter.getPageCount(); pageNo++)
11{
12 // Construct path of output image in case of a multi-page input PDF
13 String imagePath = outputPath.substring(0, outputPath.lastIndexOf(".")) + pageNo + ".png";
14
15 // Create output PNG
16 if (!converter.createImage(imagePath))
17 throw new IOException(String.format("Output image %s cannot be created. " +
18 "%s (ErrorCode: 0x%08x).",imagePath, converter.getErrorMessage(),
19 converter.getErrorCode()));
20
21 // Render page from PDF to output PNG
22 if (!converter.renderPage(pageNo))
23 throw new IOException(String.format("Page %d of PDF %d could not be rendered to PNG %s. " +
24 "%s (ErrorCode: 0x%08x).", pageNo, inputPath, imagePath, converter.getErrorMessage(),
25 converter.getErrorCode()));
26
27 // Close output image
28 if (!converter.closeImage())
29 throw new IOException(String.format("Output image %s cannot be closed. " +
30 "%s (ErrorCode: 0x%08x).", imagePath, converter.getErrorMessage(),
31 converter.getErrorCode()));
32}
33Convert PDF to TIFF and set specific compression
1// Create the converter
2pConverter = Pdf2ImgCreateObject();
3
4// Open input file
5if (!Pdf2ImgOpen(pConverter, szInputPath, _T("")))
6{
7 _tprintf(_T("Input file %s cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInputPath, Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
8 iReturnValue = 1;
9 goto cleanup;
10}
11
12// Change file name and extension
13_tcstok(szOutputPath, _T("."));
14_stprintf(szImagePath, _T("%s.tif"), szOutputPath);
15
16// Set compression and quality
17Pdf2ImgSetCompression(pConverter, eCompression);
18Pdf2ImgSetQuality(pConverter, iQuality);
19
20// Create output TIFF
21if (!Pdf2ImgCreateImage(pConverter, szImagePath))
22{
23 _tprintf(_T("Output image %s cannot be created. %s (ErrorCode: 0x%08x).\n"), szImagePath, Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
24 iReturnValue = 1;
25 goto cleanup;
26}
27
28// Loop over all pages of input file and create each time a new TIFF
29for (int iPage = 1; iPage <= Pdf2ImgGetPageCount(pConverter); iPage++)
30{
31 // Render pages from PDF to output TIFF
32 if (!Pdf2ImgRenderPage(pConverter, iPage))
33 {
34 _tprintf(_T("Page %d of PDF %s could not be rendered to TIFF %s. %s (ErrorCode: 0x%08x).\n"), iPage, szInputPath, szImagePath, Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
35 iReturnValue = 1;
36 goto cleanup;
37 }
38}
39// Close output image
40if (!Pdf2ImgCloseImage(pConverter))
41{
42 _tprintf(_T("Output image %s cannot be closed. %s (ErrorCode: 0x%08x).\n"), szImagePath, Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
43 iReturnValue = 1;
44 goto cleanup;
45}
461// Create the converter
2using (Converter converter = new Converter())
3{
4 // Open input file
5 if (!converter.Open(inputPath, ""))
6 throw new Exception(String.Format("Input file {0} cannot be opened. {1} (ErrorCode: {2}).",
7 inputPath, converter.ErrorMessage, converter.ErrorCode));
8
9 // Set compression and quality
10 converter.Compression = compression;
11 converter.ImageQuality = quality;
12
13 // Create output TIFF
14 if (!converter.CreateImage(outputPath))
15 throw new Exception(String.Format("Output image {0} cannot be created. " +
16 "{1} (ErrorCode: {2}).", outputPath, converter.ErrorMessage, converter.ErrorCode));
17
18 // Loop over all pages of input file and create a multi-page TIFF file
19 for (int pageNo = 1; pageNo <= converter.PageCount; pageNo++)
20 {
21 // Render pages from PDF to output TIFF
22 if (!converter.RenderPage(pageNo))
23 throw new Exception(String.Format("Page {0} of PDF {1} could not be rendered to " +
24 "TIFF {2}. {3} (ErrorCode: {4}).", pageNo, inputPath, outputPath,
25 converter.ErrorMessage, converter.ErrorCode));
26 }
27 // Close output image
28 if (!converter.CloseImage())
29 throw new Exception(String.Format("Output image {0} cannot be closed. " +
30 "{1} (ErrorCode: {2}).", outputPath, converter.ErrorMessage, converter.ErrorCode));
31}
321// Create the converter
2converter = new Pdf2Img();
3
4// Open input file
5if (!converter.open(inputPath, ""))
6 throw new IOException(String.format("Input file %s cannot be opened. %s (ErrorCode: 0x%08x).",
7 inputPath, converter.getErrorMessage(), converter.getErrorCode()));
8
9// Set compression and quality
10converter.setCompression(compression);
11converter.setImageQuality(quality);
12
13// Create output TIFF
14if (!converter.createImage(outputPath))
15 throw new IOException(String.format("Output image %s cannot be created. " +
16 "%s (ErrorCode: 0x%08x).", outputPath, converter.getErrorMessage(),
17 converter.getErrorCode()));
18
19// Loop over all pages of input file and create multi-page TIFF file
20for (int pageNo = 1; pageNo <= converter.getPageCount(); pageNo++)
21{
22 // Render pages from PDF to output TIFF
23 if (!converter.renderPage(pageNo))
24 throw new IOException(String.format("Page %d of PDF %d could not be rendered to TIFF %s." +
25 " %s (ErrorCode: 0x%08x).", pageNo, inputPath, outputPath, converter.getErrorMessage(),
26 converter.getErrorCode()));
27}
28// Close output image
29if (!converter.closeImage())
30 throw new IOException(String.format("Output image %s cannot be closed. " +
31 "%s (ErrorCode: 0x%08x).", outputPath, converter.getErrorMessage(),
32 converter.getErrorCode()));
33Features and Configuration
Convert PDF to image and set fax settings
1// Create the converter
2pConverter = Pdf2ImgCreateObject();
3
4// Open input file
5if (!Pdf2ImgOpen(pConverter, szInputPath, _T("")))
6{
7 _tprintf(_T("Input file %s cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInputPath,
8 Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
9 iReturnValue = 1;
10 goto cleanup;
11}
12
13// Set dithering
14Pdf2ImgSetDithering(pConverter, eDithering);
15Pdf2ImgSetBitsPerPixel(pConverter, 1);
16
17Pdf2ImgSetFitPage(pConverter, 1);
18Pdf2ImgSetCenter(pConverter, 1);
19TPDFRendererOption2 renderOptions = Pdf2ImgGetOptions2(pConverter);
20renderOptions |= eOptionNoAntialiasing | eOptionUseBoxFilter | eOptionFitPaths;
21Pdf2ImgSetOptions2(pConverter, renderOptions);
22Pdf2ImgSetRotateMode(pConverter, eRotatePortrait);
23
24// Set the TIFF type fax settings
25Pdf2ImgFaxHSetting(pConverter);
26
27// Create output image
28if (!Pdf2ImgCreateImage(pConverter, szOutputPath))
29{
30 _tprintf(_T("Output image %s cannot be created. %s (ErrorCode: 0x%08x).\n"), szOutputPath,
31 Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
32 iReturnValue = 1;
33 goto cleanup;
34}
35
36// Loop over all pages of input file and create a multi-page TIFF file
37for (int iPage = 1; iPage <= Pdf2ImgGetPageCount(pConverter); iPage++)
38{
39 // Render pages from PDF to output image
40 if (!Pdf2ImgRenderPage(pConverter, iPage))
41 {
42 _tprintf(_T("Page %d of PDF %s could not be rendered to image %s. %s (ErrorCode: 0x%08x).\n"),
43 iPage, szInputPath, szOutputPath, Pdf2ImgGetErrorMessage(pConverter),
44 Pdf2ImgGetErrorCode(pConverter));
45 iReturnValue = 1;
46 goto cleanup;
47 }
48}
49
50// Close output image
51if (!Pdf2ImgCloseImage(pConverter))
52{
53 _tprintf(_T("Output image %s cannot be closed. %s (ErrorCode: 0x%08x).\n"), szOutputPath,
54 Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
55 iReturnValue = 1;
56 goto cleanup;
57}
581// Create the converter
2using (Converter converter = new Converter())
3{
4 // Open input file
5 if (!converter.Open(inputPath, ""))
6 throw new Exception(String.Format("Input file {0} cannot be opened. " +
7 "{1} (ErrorCode: 0x{2:x}).", inputPath, converter.ErrorMessage, converter.ErrorCode));
8
9 // Set dithering
10 converter.Dithering = dithering;
11 converter.BitsPerPixel = 1;
12
13 converter.FitPage = true;
14 converter.Center = true;
15 PDFRendererOption2 rendererOptions = converter.Options2;
16 rendererOptions |= PDFRendererOption2.eOptionNoAntialiasing |
17 PDFRendererOption2.eOptionUseBoxFilter | PDFRendererOption2.eOptionFitPaths;
18 converter.Options2 = rendererOptions;
19 converter.RotateMode = PDFRotateMode.eRotatePortrait;
20
21 // Set the TIFF type fax settings
22 converter.FaxHSetting();
23
24 // Create output image
25 if (!converter.CreateImage(outputPath))
26 throw new Exception(String.Format("Output image {0} cannot be created. {1} " +
27 "(ErrorCode: 0x{2:x}).", outputPath, converter.ErrorMessage, converter.ErrorCode));
28
29 // Loop over all pages of input file and create each time a new image.
30 for (int pageNo = 1; pageNo <= converter.PageCount; pageNo++)
31 {
32 // Render page from PDF to output image
33 if (!converter.RenderPage(pageNo))
34 throw new Exception(String.Format("Page {0} of PDF {1} could not be rendered to " +
35 "image {2}. {3} (ErrorCode: 0x{4:x}).", pageNo, inputPath, outputPath,
36 converter.ErrorMessage, converter.ErrorCode));
37 }
38
39 // Close output image
40 if (!converter.CloseImage())
41 throw new Exception(String.Format("Output image {0} cannot be closed. {1} " +
42 "(ErrorCode: 0x{2:x}).", outputPath, converter.ErrorMessage, converter.ErrorCode));
43}
441// Create the converter
2converter = new Pdf2Img();
3
4// Open input file
5if (!converter.open(inputPath, ""))
6 throw new IOException(String.format("Input file %s cannot be opened. %s (ErrorCode: 0x%08x).",
7 inputPath, converter.getErrorMessage(), converter.getErrorCode()));
8
9// Set dithering
10converter.setDithering(dithering);
11converter.setBitsPerPixel(1);
12
13converter.setFitPage(1);
14converter.setCenter(true);
15int renderOptions = converter.getOptions2();
16renderOptions |= NativeLibrary.RENDEREROPTION2.eOptionNoAntialiasing |
17 NativeLibrary.RENDEREROPTION2.eOptionUseBoxFilter |
18 NativeLibrary.RENDEREROPTION2.eOptionFitPaths;
19converter.setOptions2(renderOptions);
20converter.setRotateMode(NativeLibrary.ROTATEMODE.eRotatePortrait);
21
22// Set the TIFF type fax settings
23converter.faxHSetting();
24
25// Create output image
26if (!converter.createImage(outputPath))
27 throw new IOException(String.format("Output image %s cannot be created. %s " +
28 "(ErrorCode: 0x%08x).", outputPath, converter.getErrorMessage(),
29 converter.getErrorCode()));
30
31// Loop over all pages of input file and create a multi-page TIFF file
32for (int pageNo = 1; pageNo <= converter.getPageCount(); pageNo++)
33{
34 // Render page from PDF to output image
35 if (!converter.renderPage(pageNo))
36 throw new IOException(String.format("Page %d of PDF %d could not be rendered to image %s." +
37 " %s (ErrorCode: 0x%08x).", pageNo, inputPath, outputPath, converter.getErrorMessage(),
38 converter.getErrorCode()));
39}
40
41// Close output image
42if (!converter.closeImage())
43 throw new IOException(String.format("Output image %s cannot be closed. " +
44 "%s (ErrorCode: 0x%08x).", outputPath, converter.getErrorMessage(),
45 converter.getErrorCode()));
46In Memory
Create image in memory from PDF
1// Create the converter
2pConverter = Pdf2ImgCreateObject();
3
4// Open input file
5if (!Pdf2ImgOpenMem(pConverter, pInputBuffer, nLength, _T("")))
6{
7 _tprintf(_T("Input buffer cannot be opened. %s (ErrorCode: 0x%08x).\n"), Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
8 iReturnValue = 1;
9 goto cleanup;
10}
11
12// Loop over all pages of input buffer and create each time a new image
13for (int iPage = 1; iPage <= Pdf2ImgGetPageCount(pConverter); iPage++)
14{
15 // Change file name and extension
16 _tcstok(szOutputPath, _T("."));
17 _stprintf(szImagePath, _T("%s%d%s"), szOutputPath, iPage, szExtension);
18
19 // Create output buffer
20 if (!Pdf2ImgCreateImageInMemory(pConverter, szExtension))
21 {
22 _tprintf(_T("Output buffer cannot be created. %s (ErrorCode: 0x%08x).\n"), Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
23 iReturnValue = 1;
24 goto cleanup;
25 }
26
27 // Render pages from PDF to output image
28 if (!Pdf2ImgRenderPage(pConverter, iPage))
29 {
30 _tprintf(_T("Page %d of PDF %s could not be rendered to image %s. %s (ErrorCode: 0x%08x).\n"), iPage, szInputPath, szImagePath, Pdf2ImgGetErrorMessage(pConverter), Pdf2ImgGetErrorCode(pConverter));
31 iReturnValue = 1;
32 goto cleanup;
33 }
34
35 // Get PDF as buffer
36 TPDFByteArray* pOutputBuffer = Pdf2ImgGetImage(pConverter);
37
38 if (!(pData = _tfopen(szOutputPath, _T("wb"))))
39 {
40 _tprintf(_T("Failed to create output file %s.\n"), szOutputPath);
41 iReturnValue = 1;
42 goto cleanup;
43 }
44
45 // Write bytes to output file
46 fwrite(pOutputBuffer->m_pData, pOutputBuffer->m_nLength, 1, pData);
47 fclose(pData);
48}
491// Create the converter
2using (Converter converter = new Converter())
3{
4 // Open input file
5 if (!converter.OpenMem(inputBuffer, ""))
6 throw new Exception(String.Format("Input buffer cannot be opened. " +
7 "{0} (ErrorCode: 0x{1:x}).", converter.ErrorMessage, converter.ErrorCode));
8
9 // Loop over all pages of input buffer and create each time a new image.
10 for (int pageNo = 1; pageNo <= converter.PageCount; pageNo++)
11 {
12 // Construct path of output image in case of a multi-page input PDF
13 string imagePath = converter.PageCount == 1 ? outputPath : Path.ChangeExtension(outputPath, null) + pageNo.ToString() + extension;
14
15 // Create output buffer
16 if (!converter.CreateImageInMemory(extension))
17 throw new Exception(String.Format("Output buffer cannot be created. " +
18 "{0} (ErrorCode: 0x{1:x}).", converter.ErrorMessage, converter.ErrorCode));
19
20 // Render page from input PDF to output image
21 if (!converter.RenderPage(pageNo))
22 throw new Exception(String.Format("Page {0} of PDF {1} could not be rendered to " +
23 "image {2}. {3} (ErrorCode: 0x{4:x}).", pageNo, inputPath,
24 imagePath, converter.ErrorMessage, converter.ErrorCode));
25
26 byte[] outputBuffer = converter.GetImage();
27
28 if (outputBuffer == null)
29 throw new Exception(String.Format("Getting buffer of output image failed." +
30 "{0} (ErrorCode: 0x{1:x}).", converter.ErrorMessage, converter.ErrorCode));
31
32 // Write bytes to output file.
33 File.WriteAllBytes(imagePath, outputBuffer);
34 }
35}
361// Create the converter
2converter = new Pdf2Img();
3
4// Open input file
5if (!converter.openMem(inputBuffer, ""))
6 throw new IOException(String.format("Input buffer cannot be opened. %s (ErrorCode: 0x%08x).",
7 converter.getErrorMessage(), converter.getErrorCode()));
8
9// Loop over all pages of input file and create each time a new image
10for (int pageNo = 1; pageNo <= converter.getPageCount(); pageNo++)
11{
12 // Construct path of output image in case of a multi-page input PDF
13 String imagePath = outputPath.substring(0, outputPath.lastIndexOf(".")) + pageNo + extension;
14
15 // Create output buffer
16 if (!converter.createImageInMemory(extension))
17 throw new IOException(String.format("Output buffer cannot be created. " +
18 "%s (ErrorCode: 0x%08x).", converter.getErrorMessage(), converter.getErrorCode()));
19
20 // Render page from input PDF to output image
21 if (!converter.renderPage(pageNo))
22 throw new IOException(String.format("Page %d of PDF %s could not be rendered to image %s." +
23 " %s (ErrorCode: 0x%08x).", pageNo, inputPath, imagePath, converter.getErrorMessage(),
24 converter.getErrorCode()));
25
26 // Get image as buffer
27 byte[] outputBuffer = converter.getImage();
28 if (outputBuffer == null)
29 throw new IOException(String.format("Getting buffer of output image failed. " +
30 "%s (ErrorCode: 0x%08x).", converter.getErrorMessage(), converter.getErrorCode()));
31
32 // Write bytes to output file
33 Files.write(Paths.get(imagePath), outputBuffer, StandardOpenOption.CREATE_NEW);
34}
35
36// Close file of input buffer
37if (!converter.close())
38 throw new IOException(String.format("Input file %s cannot be closed. %s (ErrorCode: 0x%08x).",
39 inputPath, converter.getErrorMessage(), converter.getErrorCode()));
40