Attachment 58269 Details for Bug 32340 – patch for HtmlOutputDev.cc to extract mochrome mask images as PNGs

[patch] patch for HtmlOutputDev.cc to extract mochrome mask images as PNGs

mask-to-png.diff (text/plain), 2.50 KB, created by Ihar Filipau on 2012-03-10 06:49:30 UTC

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Creator: Ihar Filipau

Created: 2012-03-10 06:49:30 UTC

Size: 2.50 KB

patch

obsolete

>diff --git a/utils/HtmlOutputDev.cc b/utils/HtmlOutputDev.cc
>index 17541a2..22f2b9a 100644
>--- a/utils/HtmlOutputDev.cc
>+++ b/utils/HtmlOutputDev.cc
>@@ -1322,7 +1322,80 @@ void HtmlOutputDev::drawImageMask(GfxState *state, Object *ref, Stream *str,
>     drawJpegImage(state, str);
>   }
>   else {
>-    OutputDev::drawImageMask(state, ref, str, width, height, invert, interpolate, inlineImg);
>+#ifdef ENABLE_LIBPNG
>+    FILE *f1;
>+    GooString *fName=new GooString(Docname);
>+    fName->append("-");
>+    GooString *pgNum= GooString::fromInt(pageNum);
>+    GooString *imgnum= GooString::fromInt(pages->getNumImages()+1);
>+
>+    // open the image file
>+    fName->append(pgNum)->append("_")->append(imgnum)->append(".png");
>+    delete pgNum;
>+    delete imgnum;
>+
>+    if (!(f1 = fopen(fName->getCString(), "wb"))) {
>+      error(errIO, -1, "Couldn't open image file '%s'", fName->getCString());
>+      delete fName;
>+      return;
>+    }
>+
>+    PNGWriter *writer = new PNGWriter( PNGWriter::MONOCHROME );
>+    if (!writer->init(f1, width, height, 72, 72)) {
>+      error(errInternal, -1, "Can't init PNG for image '%s'", fName->getCString());
>+      delete writer;
>+      fclose(f1);
>+      return;
>+    }
>+
>+    int bytes_per_row = ((width + 7) / 8);
>+    Guchar *bit_row = (Guchar *)gmalloc( bytes_per_row );
>+    Guchar *png_row = (Guchar *)gmalloc( width );
>+
>+    str->reset();
>+    for (int ri = 0; ri < height; ++ri)
>+    {
>+      // read the row bits of the mask
>+      for (int i = 0; i < bytes_per_row; ++i) {
>+        if ((bit_row[i] = str->getChar()) != EOF) {
>+        } else {
>+          error(errIO, -1, "Image mask stream is corrupt for image '%s'", fName->getCString());
>+          delete writer;
>+          fclose(f1);
>+          gfree(bit_row);
>+          gfree(png_row);
>+          return;
>+        }
>+      }
>+
>+      // convert bits into a bytes for PNG
>+      for(int i = 0; i < width; i++)
>+        png_row[i] = ((bit_row[i/8]) & (1<<(7-(i%8)))) ? 0x00 : 0xff ; // invert for PNG
>+
>+      if (!writer->writeRow( &png_row ))
>+      {
>+        error(errIO, -1, "Failed to write into PNG '%s'", fName->getCString());
>+        delete writer;
>+        fclose(f1);
>+        gfree(bit_row);
>+        gfree(png_row);
>+        return;
>+      }
>+    }
>+    str->close();
>+
>+    writer->close();
>+    delete writer;
>+    fclose(f1);
>+
>+    gfree(bit_row);
>+    gfree(png_row);
>+
>+    pages->addImage(fName, state);
>+#else
>+    OutputDev::drawImage(state, ref, str, width, height, colorMap, interpolate,
>+			 maskColors, inlineImg);
>+#endif
>   }
> }
>

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Attachments on bug 32340: 58269 | 58294 | 58299 | 58347 | 133760

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