Attachment 4326 Details for Bug 5540 – an ugly patch to add smask support to the cairo backend

[patch] an ugly patch to add smask support to the cairo backend

smask.patch (text/plain), 7.14 KB, created by Jeff Muizelaar on 2006-01-11 16:01:54 UTC

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Creator: Jeff Muizelaar

Created: 2006-01-11 16:01:54 UTC

Size: 7.14 KB

patch

obsolete

>? mkinstalldirs
>Index: poppler/CairoOutputDev.cc
>===================================================================
>RCS file: /cvs/poppler/poppler/poppler/CairoOutputDev.cc,v
>retrieving revision 1.26
>diff -u -r1.26 CairoOutputDev.cc
>--- poppler/CairoOutputDev.cc	10 Jan 2006 17:55:59 -0000	1.26
>+++ poppler/CairoOutputDev.cc	11 Jan 2006 05:02:04 -0000
>@@ -533,6 +535,105 @@
>   delete imgStr;
> }
> 
>+void CairoOutputDev::drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str,
>+				int width, int height,
>+				GfxImageColorMap *colorMap,
>+				Stream *maskStr,
>+				int maskWidth, int maskHeight,
>+				GfxImageColorMap *maskColorMap)
>+{
>+  ImageStream *maskImgStr;
>+  maskImgStr = new ImageStream(maskStr, maskWidth,
>+				       maskColorMap->getNumPixelComps(),
>+				       maskColorMap->getBits());
>+  maskImgStr->reset();
>+
>+  unsigned char *maskBuffer;
>+  maskBuffer = (unsigned char *)gmalloc (maskWidth * maskHeight * 4);
>+  unsigned char *maskDest;
>+  cairo_surface_t *maskImage;
>+  cairo_pattern_t *maskPattern;
>+  Guchar *pix;
>+  int x, y;
>+    for (y = 0; y < maskHeight; y++) {
>+      maskDest = (unsigned char *) (maskBuffer + y * 4 * maskWidth);
>+      pix = maskImgStr->getLine();
>+      maskColorMap->getGrayLine (pix, maskDest, maskWidth);
>+    }
>+
>+    maskImage = cairo_image_surface_create_for_data (maskBuffer, CAIRO_FORMAT_A8,
>+						 maskWidth, maskHeight, maskWidth * 4);
>+
>+
>+  
>+  unsigned char *buffer;
>+  unsigned int *dest;
>+  cairo_surface_t *image;
>+  cairo_pattern_t *pattern;
>+  ImageStream *imgStr;
>+  GfxRGB rgb;
>+  int alpha, i;
>+  double *ctm;
>+  cairo_matrix_t matrix;
>+  int is_identity_transform;
>+
>+  buffer = (unsigned char *)gmalloc (width * height * 4);
>+
>+  /* TODO: Do we want to cache these? */
>+  imgStr = new ImageStream(str, width,
>+			   colorMap->getNumPixelComps(),
>+			   colorMap->getBits());
>+  imgStr->reset();
>+  
>+  /* ICCBased color space doesn't do any color correction
>+   * so check its underlying color space as well */
>+  is_identity_transform = colorMap->getColorSpace()->getMode() == csDeviceRGB ||
>+		  colorMap->getColorSpace()->getMode() == csICCBased && 
>+		  ((GfxICCBasedColorSpace*)colorMap->getColorSpace())->getAlt()->getMode() == csDeviceRGB;
>+
>+    for (y = 0; y < height; y++) {
>+      dest = (unsigned int *) (buffer + y * 4 * width);
>+      pix = imgStr->getLine();
>+      colorMap->getRGBLine (pix, dest, width);
>+    }
>+
>+    image = cairo_image_surface_create_for_data (buffer, CAIRO_FORMAT_RGB24,
>+						 width, height, width * 4);
>+
>+  if (image == NULL)
>+    return;
>+  pattern = cairo_pattern_create_for_surface (image);
>+  maskPattern = cairo_pattern_create_for_surface (maskImage);
>+  if (pattern == NULL)
>+    return;
>+
>+  ctm = state->getCTM();
>+  LOG (printf ("drawImageMask %dx%d, matrix: %f, %f, %f, %f, %f, %f\n",
>+	       width, height, ctm[0], ctm[1], ctm[2], ctm[3], ctm[4], ctm[5]));
>+  matrix.xx = ctm[0] / width;
>+  matrix.xy = -ctm[2] / height;
>+  matrix.yx = ctm[1] / width;
>+  matrix.yy = -ctm[3] / height;
>+  matrix.x0 = ctm[2] + ctm[4];
>+  matrix.y0 = ctm[3] + ctm[5];
>+
>+  cairo_matrix_invert (&matrix);
>+
>+  cairo_pattern_set_matrix (pattern, &matrix);
>+  cairo_pattern_set_matrix (maskPattern, &matrix);
>+
>+  cairo_pattern_set_filter (pattern, CAIRO_FILTER_BILINEAR);
>+  cairo_set_source (cairo, pattern);
>+  cairo_mask (cairo, maskPattern);
>+
>+  cairo_pattern_destroy (maskPattern);
>+  cairo_surface_destroy (maskImage);
>+  cairo_pattern_destroy (pattern);
>+  cairo_surface_destroy (image);
>+  free (buffer);
>+  free (maskBuffer);
>+  delete imgStr;
>+}
> void CairoOutputDev::drawImage(GfxState *state, Object *ref, Stream *str,
> 				int width, int height,
> 				GfxImageColorMap *colorMap,
>Index: poppler/CairoOutputDev.h
>===================================================================
>RCS file: /cvs/poppler/poppler/poppler/CairoOutputDev.h,v
>retrieving revision 1.11
>diff -u -r1.11 CairoOutputDev.h
>--- poppler/CairoOutputDev.h	10 Jan 2006 17:55:59 -0000	1.11
>+++ poppler/CairoOutputDev.h	11 Jan 2006 05:02:04 -0000
>@@ -117,6 +117,12 @@
>   virtual void drawImage(GfxState *state, Object *ref, Stream *str,
> 			 int width, int height, GfxImageColorMap *colorMap,
> 			 int *maskColors, GBool inlineImg);
>+  virtual void drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str,
>+				int width, int height,
>+				GfxImageColorMap *colorMap,
>+				Stream *maskStr,
>+				int maskWidth, int maskHeight,
>+				GfxImageColorMap *maskColorMap);
> 
>   //----- Type 3 font operators
>   virtual void type3D0(GfxState *state, double wx, double wy);
>Index: poppler/GfxState.cc
>===================================================================
>RCS file: /cvs/poppler/poppler/poppler/GfxState.cc,v
>retrieving revision 1.8
>diff -u -r1.8 GfxState.cc
>--- poppler/GfxState.cc	9 Dec 2005 20:49:59 -0000	1.8
>+++ poppler/GfxState.cc	11 Jan 2006 05:02:05 -0000
>@@ -204,6 +204,23 @@
>   }
> }
> 
>+void GfxColorSpace::getGrayLine(Guchar *in, unsigned char *out, int length) {
>+  int i, j, n;
>+  GfxColor color;
>+  GfxGray gray;
>+
>+  n = getNComps();
>+  for (i = 0; i < length; i++) {
>+    
>+    for (j = 0; j < n; j++)
>+      color.c[j] = in[i * n + j] * 256;
>+
>+    getGray (&color, &gray);
>+    out[i] = colToByte(gray);
>+  }
>+}
>+
>+
> //------------------------------------------------------------------------
> // GfxDeviceGrayColorSpace
> //------------------------------------------------------------------------
>@@ -3433,6 +3450,39 @@
>   }
> }
> 
>+void GfxImageColorMap::getGrayLine(Guchar *in, Guchar *out, int length) {
>+  GfxColor color;
>+  double *p;
>+  int i, j;
>+  Guchar *inp, *outp, *tmp_line;
>+  GfxColorSpace *base;
>+
>+  switch (colorSpace->getMode()) {
>+  case csIndexed:
>+  case csSeparation:
>+    tmp_line = (Guchar *) gmalloc (length * nComps2);
>+    for (i = 0; i < length; i++) {
>+      for (j = 0; j < nComps2; j++) {
>+	tmp_line[i * nComps2 + j] = byte_lookup[in[i] * nComps2 + j];
>+      }
>+    }
>+    colorSpace2->getGrayLine(tmp_line, out, length);
>+    gfree (tmp_line);
>+    break;
>+
>+  default:
>+    inp = in;
>+    for (j = 0; j < length; j++)
>+      for (i = 0; i < nComps; i++) {
>+	*inp = byte_lookup[*inp * nComps + i];
>+	inp++;
>+      }
>+    colorSpace->getGrayLine(in, out, length);
>+    break;
>+  }
>+
>+}
>+
> void GfxImageColorMap::getRGBLine(Guchar *in, unsigned int *out, int length) {
>   GfxColor color;
>   double *p;
>Index: poppler/GfxState.h
>===================================================================
>RCS file: /cvs/poppler/poppler/poppler/GfxState.h,v
>retrieving revision 1.4
>diff -u -r1.4 GfxState.h
>--- poppler/GfxState.h	30 Oct 2005 20:29:05 -0000	1.4
>+++ poppler/GfxState.h	11 Jan 2006 05:02:06 -0000
>@@ -151,6 +151,7 @@
>   virtual void getRGB(GfxColor *color, GfxRGB *rgb) = 0;
>   virtual void getCMYK(GfxColor *color, GfxCMYK *cmyk) = 0;
>   virtual void getRGBLine(Guchar *in, unsigned int *out, int length);
>+  virtual void getGrayLine(Guchar *in, Guchar *out, int length);
> 
>   // Return the number of color components.
>   virtual int getNComps() = 0;
>@@ -869,6 +870,7 @@
>   void getGray(Guchar *x, GfxGray *gray);
>   void getRGB(Guchar *x, GfxRGB *rgb);
>   void getRGBLine(Guchar *in, unsigned int *out, int length);
>+  void getGrayLine(Guchar *in, Guchar *out, int length);
>   void getCMYK(Guchar *x, GfxCMYK *cmyk);
>   void getColor(Guchar *x, GfxColor *color);
>

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