Attachment 47322 Details for Bug 37688 – patch to make -level2sep and -level3sep write gray instead of cmyk

[patch] patch to make -level2sep and -level3sep write gray instead of cmyk

poppler-0.17.1-cmyk-to-gray.pat (text/plain), 4.34 KB, created by William Bader on 2011-05-30 08:39:06 UTC

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Filename:

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Creator: William Bader

Created: 2011-05-30 08:39:06 UTC

Size: 4.34 KB

patch

obsolete

>--- poppler-0.17.1-cmyk-to-gray/poppler/PSOutputDev.cc-	2011-05-30 12:00:42.199995904 -0300
>+++ poppler-0.17.1-cmyk-to-gray/poppler/PSOutputDev.cc	2011-05-30 12:23:40.878191236 -0300
>@@ -2986,6 +2986,7 @@
>   GfxState *state;
>   SplashBitmap *bitmap;
>   Stream *str0, *str;
>+  Stream *str1 = NULL;
>   Object obj;
>   Guchar *p;
>   Guchar col[4];
>@@ -2995,6 +2996,8 @@
>   char hexBuf[32*2 + 2];	// 32 values X 2 chars/value + line ending + null
>   Guchar digit;
>   GBool useBinary;
>+  GBool isGray;
>+  int compCyan;
> 
>   if (!forceRasterize) {
>     scan = new PreScanOutputDev(xref);
>@@ -3225,15 +3228,35 @@
>   case psLevel3Sep:
>     obj.initNull();
>     str0 = new MemStream((char *)bitmap->getDataPtr(), 0, w * h * 4, &obj);
>-    processColors |= psProcessCMYK;
>-    writePS("/DeviceCMYK setcolorspace\n");
>-    str = new RunLengthEncoder(str0);
>+    isGray = gTrue;
>+    while ((compCyan = str0->getChar()) != EOF) {
>+      if (str0->getChar() != compCyan ||
>+          str0->getChar() != compCyan) {
>+	isGray = gFalse;
>+	break;
>+      }
>+      str0->getChar();
>+    }
>+    str0->reset();
>+    if (isGray) {
>+      writePS("/DeviceGray setcolorspace\n");
>+      str1 = new CMKYGrayEncoder(str0);
>+      str = new RunLengthEncoder(str1);
>+    } else {
>+      processColors |= psProcessCMYK;
>+      writePS("/DeviceCMYK setcolorspace\n");
>+      str = new RunLengthEncoder(str0);
>+    }
>     writePS("<<\n  /ImageType 1\n");
>     writePSFmt("  /Width {0:d}\n", bitmap->getWidth());
>     writePSFmt("  /Height {0:d}\n", bitmap->getHeight());
>     writePSFmt("  /ImageMatrix [{0:d} 0 0 {1:d} 0 {2:d}]\n", w, -h, h);
>     writePS("  /BitsPerComponent 8\n");
>-    writePS("  /Decode [0 1 0 1 0 1 0 1]\n");
>+    if (isGray) {
>+      writePS("  /Decode [1 0]\n");
>+    } else {
>+      writePS("  /Decode [0 1 0 1 0 1 0 1]\n");
>+    }
>     writePS("  /DataSource currentfile\n");
>     useBinary = globalParams->getPSBinary();
>     if (useBinary) {
>@@ -3267,9 +3290,12 @@
>     }
>     if (useBinary) {
>       writePS("\n%%EndData\n");
>+    } else if (isGray) {
>+      writePSChar('\n');
>     }
>     str->close();
>     delete str;
>+    // delete str1; // deleted by str0
>     delete str0;
>     break;
>   case psLevel2:
>--- poppler-0.17.1-cmyk-to-gray/poppler/Stream.cc-	2010-11-08 17:45:24.000000000 -0300
>+++ poppler-0.17.1-cmyk-to-gray/poppler/Stream.cc	2011-05-30 12:23:40.882191172 -0300
>@@ -4923,3 +4923,46 @@
>   bufPtr = buf;
>   return gTrue;
> }
>+
>+//------------------------------------------------------------------------
>+// CMKYGrayEncoder
>+//------------------------------------------------------------------------
>+
>+CMKYGrayEncoder::CMKYGrayEncoder(Stream *strA):
>+    FilterStream(strA) {
>+  bufPtr = bufEnd = buf;
>+  eof = gFalse;
>+}
>+
>+CMKYGrayEncoder::~CMKYGrayEncoder() {
>+  if (str->isEncoder())
>+    delete str;
>+}
>+
>+void CMKYGrayEncoder::reset() {
>+  str->reset();
>+  bufPtr = bufEnd = buf;
>+  eof = gFalse;
>+}
>+
>+GBool CMKYGrayEncoder::fillBuf() {
>+  int c0, c1, c2, c3;
>+  int i;
>+
>+  if (eof) {
>+    return gFalse;
>+  }
>+  c0 = str->getChar();
>+  c1 = str->getChar();
>+  c2 = str->getChar();
>+  c3 = str->getChar();
>+  if (c3 == EOF) {
>+    eof = gTrue;
>+    return gFalse;
>+  }
>+  i = (3 * c0 + 6 * c1 + c2) / 10 + c3;
>+  if (i > 255) i = 255;
>+  bufPtr = bufEnd = buf;
>+  *bufEnd++ = (char) i;
>+  return gTrue;
>+}
>--- poppler-0.17.1-cmyk-to-gray/poppler/Stream.h-	2010-11-10 20:08:18.000000000 -0300
>+++ poppler-0.17.1-cmyk-to-gray/poppler/Stream.h	2011-05-30 12:23:40.883191150 -0300
>@@ -1141,4 +1141,33 @@
>   GBool fillBuf();
> };
> 
>+//------------------------------------------------------------------------
>+// CMKYGrayEncoder
>+//------------------------------------------------------------------------
>+
>+class CMKYGrayEncoder: public FilterStream {
>+public:
>+
>+  CMKYGrayEncoder(Stream *strA);
>+  virtual ~CMKYGrayEncoder();
>+  virtual StreamKind getKind() { return strWeird; }
>+  virtual void reset();
>+  virtual int getChar()
>+    { return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr++ & 0xff); }
>+  virtual int lookChar()
>+    { return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr & 0xff); }
>+  virtual GooString *getPSFilter(int /*psLevel*/, char * /*indent*/) { return NULL; }
>+  virtual GBool isBinary(GBool /*last = gTrue*/) { return gFalse; }
>+  virtual GBool isEncoder() { return gTrue; }
>+
>+private:
>+
>+  char buf[2];
>+  char *bufPtr;
>+  char *bufEnd;
>+  GBool eof;
>+
>+  GBool fillBuf();
>+};
>+
> #endif

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Attachments on bug 37688: 47248 | 47292 | 47320 | 47322 | 48796 | 48826

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