DGNum/Stirling-PDF
14
0
Fork 0
Code Issues 4 Pull requests 1 Projects Releases Packages Wiki Activity

removal

Browse source
This commit is contained in:
Anthony Stirling 2023-09-02 20:32:44 +01:00
parent ef07963d79
commit 9ece6dacbd
1 changed files with 74 additions and 36 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

110
src/main/java/stirling/software/SPDF/controller/api/CropController.java
View file

@ -4,6 +4,9 @@ import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.common.PDRectangle;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.ResponseEntity;
@ -25,54 +28,89 @@ import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.media.Schema;
import io.swagger.v3.oas.annotations.tags.Tag;
import stirling.software.SPDF.utils.WebResponseUtils;
import org.apache.commons.io.IOUtils;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
import org.apache.pdfbox.pdmodel.font.PDFont;
import org.apache.pdfbox.pdmodel.font.PDType0Font;
import org.apache.pdfbox.pdmodel.font.PDType1Font;
import org.apache.pdfbox.pdmodel.graphics.image.LosslessFactory;
import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;
import org.apache.pdfbox.pdmodel.graphics.state.PDExtendedGraphicsState;
import org.apache.pdfbox.util.Matrix;
import org.apache.pdfbox.pdmodel.graphics.color.PDColorSpace;
import org.apache.pdfbox.pdmodel.graphics.color.PDICCBased;
import org.apache.pdfbox.pdmodel.graphics.form.PDFormXObject;
import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;
import org.apache.pdfbox.pdmodel.graphics.optionalcontent.PDOptionalContentGroup;
import org.apache.pdfbox.pdmodel.graphics.optionalcontent.PDOptionalContentProperties;
import stirling.software.SPDF.utils.WebResponseUtils;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
import org.apache.pdfbox.multipdf.LayerUtility;
@RestController
@Tag(name = "General", description = "General APIs")
public class CropController {
private static final Logger logger = LoggerFactory.getLogger(CropController.class);
private static final Logger logger = LoggerFactory.getLogger(CropController.class);
@PostMapping(value = "/crop", consumes = "multipart/form-data")
@Operation(summary = "Crops a PDF document", description = "This operation takes an input PDF file and crops it according to the given coordinates. Input:PDF Output:PDF Type:SISO")
public ResponseEntity<byte[]> cropPdf(
@Parameter(description = "The input PDF file", required = true) @RequestParam("fileInput") MultipartFile file,
@Parameter(description = "The x-coordinate of the top-left corner of the crop area", required = true, schema = @Schema(type = "number")) @RequestParam("x") float x,
@Parameter(description = "The y-coordinate of the top-left corner of the crop area", required = true, schema = @Schema(type = "number")) @RequestParam("y") float y,
@Parameter(description = "The width of the crop area", required = true, schema = @Schema(type = "number")) @RequestParam("width") float width,
@Parameter(description = "The height of the crop area", required = true, schema = @Schema(type = "number")) @RequestParam("height") float height) throws IOException {
byte[] bytes = file.getBytes();
System.out.println("x=" + x + ", " + "y=" + y + ", " + "width=" + width + ", " +"height=" + height );
PdfReader reader = new PdfReader(new ByteArrayInputStream(bytes));
PdfDocument pdfDoc = new PdfDocument(reader);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PdfWriter writer = new PdfWriter(baos);
PdfDocument outputPdf = new PdfDocument(writer);
int totalPages = pdfDoc.getNumberOfPages();
for (int i = 1; i <= totalPages; i++) {
PdfPage page = outputPdf.addNewPage(new PageSize(width, height));
PdfCanvas pdfCanvas = new PdfCanvas(page);
@Parameter(description = "The input PDF file", required = true) @RequestParam("fileInput") MultipartFile file,
@Parameter(description = "The x-coordinate of the top-left corner of the crop area", required = true, schema = @Schema(type = "number")) @RequestParam("x") float x,
@Parameter(description = "The y-coordinate of the top-left corner of the crop area", required = true, schema = @Schema(type = "number")) @RequestParam("y") float y,
@Parameter(description = "The width of the crop area", required = true, schema = @Schema(type = "number")) @RequestParam("width") float width,
@Parameter(description = "The height of the crop area", required = true, schema = @Schema(type = "number")) @RequestParam("height") float height)
throws IOException {
PdfFormXObject formXObject = pdfDoc.getPage(i).copyAsFormXObject(outputPdf);
// Save the graphics state, apply the transformations, add the object, and then
// restore the graphics state
pdfCanvas.saveState();
pdfCanvas.rectangle(x, y, width, height);
pdfCanvas.clip();
pdfCanvas.addXObject(formXObject, -x, -y);
pdfCanvas.restoreState();
}
outputPdf.close();
byte[] pdfContent = baos.toByteArray();
pdfDoc.close();
return WebResponseUtils.bytesToWebResponse(pdfContent,
file.getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_cropped.pdf");
PDDocument sourceDocument = PDDocument.load(new ByteArrayInputStream(file.getBytes()));
PDDocument newDocument = new PDDocument();
int totalPages = sourceDocument.getNumberOfPages();
LayerUtility layerUtility = new LayerUtility(newDocument);
for (int i = 0; i < totalPages; i++) {
PDPage sourcePage = sourceDocument.getPage(i);
// Create a new page with the size of the source page
PDPage newPage = new PDPage(sourcePage.getMediaBox());
newDocument.addPage(newPage);
PDPageContentStream contentStream = new PDPageContentStream(newDocument, newPage);
// Import the source page as a form XObject
PDFormXObject formXObject = layerUtility.importPageAsForm(sourceDocument, i);
contentStream.saveGraphicsState();
// Define the crop area
contentStream.addRect(x, y, width, height);
contentStream.clip();
// Draw the entire formXObject
contentStream.drawForm(formXObject);
contentStream.restoreGraphicsState();
contentStream.close();
// Now, set the new page's media box to the cropped size
newPage.setMediaBox(new PDRectangle(x, y, width, height));
}
ByteArrayOutputStream baos = new ByteArrayOutputStream();
newDocument.save(baos);
newDocument.close();
sourceDocument.close();
byte[] pdfContent = baos.toByteArray();
return WebResponseUtils.bytesToWebResponse(pdfContent, file.getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_cropped.pdf");
}
}