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Added support for multiple adding an image overlay to multiple pages (#86)

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libertyunion 2023-04-11 16:22:59 -04:00 committed by GitHub
parent f9fe303671
commit fdbc7f4621
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3 changed files with 31 additions and 21 deletions
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4
src/main/java/stirling/software/SPDF/controller/OverlayImageController.java
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@ -28,11 +28,11 @@ public class OverlayImageController {
@PostMapping("/add-image")
public ResponseEntity<byte[]> overlayImage(@RequestParam("fileInput") MultipartFile pdfFile, @RequestParam("fileInput2") MultipartFile imageFile, @RequestParam("x") float x,
@RequestParam("y") float y) {
@RequestParam("y") float y, @RequestParam("everyPage") boolean everyPage) {
try {
byte[] pdfBytes = pdfFile.getBytes();
byte[] imageBytes = imageFile.getBytes();
byte[] result = PdfUtils.overlayImage(pdfBytes, imageBytes, x, y);
byte[] result = PdfUtils.overlayImage(pdfBytes, imageBytes, x, y, everyPage);
return PdfUtils.bytesToWebResponse(result, pdfFile.getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_overlayed.pdf");
} catch (IOException e) {

45
src/main/java/stirling/software/SPDF/utils/PdfUtils.java
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@ -188,29 +188,36 @@ public class PdfUtils {
}
}
public static byte[] overlayImage(byte[] pdfBytes, byte[] imageBytes, float x, float y) throws IOException {
public static byte[] overlayImage(byte[] pdfBytes, byte[] imageBytes, float x, float y, boolean everyPage) throws IOException {
PDDocument document = PDDocument.load(new ByteArrayInputStream(pdfBytes));
try (PDDocument document = PDDocument.load(new ByteArrayInputStream(pdfBytes))) {
// Get the first page of the PDF
PDPage page = document.getPage(0);
try (PDPageContentStream contentStream = new PDPageContentStream(document, page, PDPageContentStream.AppendMode.APPEND, true)) {
// Create an image object from the image bytes
PDImageXObject image = PDImageXObject.createFromByteArray(document, imageBytes, "");
// Draw the image onto the page at the specified x and y coordinates
contentStream.drawImage(image, x, y);
logger.info("Image successfully overlayed onto PDF");
int pages = document.getNumberOfPages();
for (int i = 0; i < pages; i++) {
PDPage page = document.getPage(i);
try (PDPageContentStream contentStream = new PDPageContentStream(document, page, PDPageContentStream.AppendMode.APPEND, true)) {
// Create an image object from the image bytes
PDImageXObject image = PDImageXObject.createFromByteArray(document, imageBytes, "");
// Draw the image onto the page at the specified x and y coordinates
contentStream.drawImage(image, x, y);
logger.info("Image successfully overlayed onto PDF");
if (everyPage == false && i == 0) {
break;
}
} catch (IOException e) {
// Log an error message if there is an issue overlaying the image onto the PDF
logger.error("Error overlaying image onto PDF", e);
throw e;
}
}
// Create a ByteArrayOutputStream to save the PDF to
ByteArrayOutputStream baos = new ByteArrayOutputStream();
document.save(baos);
logger.info("PDF successfully saved to byte array");
return baos.toByteArray();
} catch (IOException e) {
// Log an error message if there is an issue overlaying the image onto the PDF
logger.error("Error overlaying image onto PDF", e);
throw e;
// Create a ByteArrayOutputStream to save the PDF to
ByteArrayOutputStream baos = new ByteArrayOutputStream();
document.save(baos);
logger.info("PDF successfully saved to byte array");
return baos.toByteArray();
}
}
public static ResponseEntity<byte[]> iTextDocToWebResponse(Document document, String docName) throws IOException, DocumentException {
// Close the document

3
src/main/resources/templates/add-image.html
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@ -26,6 +26,9 @@
<div class="form-group">
<label for="y">Y</label> <input type="number" class="form-control" id="y" name="y" step="0.01" required>
</div>
<div class="form-group">
<input type="checkbox" id="everyPage" name="everyPage" value="true"> <label for="everyPage">Every Page?</label>
</div>
<button type="submit" id="submitBtn" class="btn btn-primary" th:text="#{addImage.submit}"></button>
</form>
</div>