splashoutputdev.cc

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	colorMap->getCMYK(&pix, &cmyk);
	imgData.lookup[4*i] = colToByte(cmyk.c);
	imgData.lookup[4*i+1] = colToByte(cmyk.m);
	imgData.lookup[4*i+2] = colToByte(cmyk.y);
	imgData.lookup[4*i+3] = colToByte(cmyk.k);
      }
      break;
#endif
      break;
    }
  }

  if (colorMode == splashModeMono1) {
    srcMode = splashModeMono8;
  } else {
    srcMode = colorMode;
  }
  src = maskColors ? &alphaImageSrc : &imageSrc;
  splash->drawImage(src, &imgData, srcMode, maskColors ? gTrue : gFalse,
		    width, height, mat);
  if (inlineImg) {
    while (imgData.y < height) {
      imgData.imgStr->getLine();
      ++imgData.y;
    }
  }

  gfree(imgData.lookup);
  delete imgData.imgStr;
  str->close();
}

struct SplashOutMaskedImageData {
  ImageStream *imgStr;
  GfxImageColorMap *colorMap;
  SplashBitmap *mask;
  SplashColorPtr lookup;
  SplashColorMode colorMode;
  int width, height, y;
};

GBool SplashOutputDev::maskedImageSrc(void *data, SplashColorPtr colorLine,
				      Guchar *alphaLine) {
  SplashOutMaskedImageData *imgData = (SplashOutMaskedImageData *)data;
  Guchar *p, *aq;
  SplashColor maskColor;
  SplashColorPtr q, col;
  GfxRGB rgb;
  GfxGray gray;
#if SPLASH_CMYK
  GfxCMYK cmyk;
#endif
  Guchar alpha;
  int nComps, x;

  if (imgData->y == imgData->height) {
    return gFalse;
  }

  nComps = imgData->colorMap->getNumPixelComps();

  for (x = 0, p = imgData->imgStr->getLine(), q = colorLine, aq = alphaLine;
       x < imgData->width;
       ++x, p += nComps) {
    imgData->mask->getPixel(x, imgData->y, maskColor);
    alpha = maskColor[0] ? 0xff : 0x00;
    if (imgData->lookup) {
      switch (imgData->colorMode) {
      case splashModeMono1:
      case splashModeMono8:
	*q++ = imgData->lookup[*p];
	*aq++ = alpha;
	break;
      case splashModeRGB8:
      case splashModeBGR8:
	col = &imgData->lookup[3 * *p];
	*q++ = col[0];
	*q++ = col[1];
	*q++ = col[2];
	*aq++ = alpha;
	break;
#if SPLASH_CMYK
      case splashModeCMYK8:
	col = &imgData->lookup[4 * *p];
	*q++ = col[0];
	*q++ = col[1];
	*q++ = col[2];
	*q++ = col[3];
	*aq++ = alpha;
	break;
#endif
      }
    } else {
      switch (imgData->colorMode) {
      case splashModeMono1:
      case splashModeMono8:
	imgData->colorMap->getGray(p, &gray);
	*q++ = colToByte(gray);
	*aq++ = alpha;
	break;
      case splashModeRGB8:
      case splashModeBGR8:
	imgData->colorMap->getRGB(p, &rgb);
	*q++ = colToByte(rgb.r);
	*q++ = colToByte(rgb.g);
	*q++ = colToByte(rgb.b);
	*aq++ = alpha;
	break;
#if SPLASH_CMYK
      case splashModeCMYK8:
	imgData->colorMap->getCMYK(p, &cmyk);
	*q++ = colToByte(cmyk.c);
	*q++ = colToByte(cmyk.m);
	*q++ = colToByte(cmyk.y);
	*q++ = colToByte(cmyk.k);
	*aq++ = alpha;
	break;
#endif
      }
    }
  }

  ++imgData->y;
  return gTrue;
}

void SplashOutputDev::drawMaskedImage(GfxState *state, Object *ref,
				      Stream *str, int width, int height,
				      GfxImageColorMap *colorMap,
				      Stream *maskStr, int maskWidth,
				      int maskHeight, GBool maskInvert) {
  GfxImageColorMap *maskColorMap;
  Object maskDecode, decodeLow, decodeHigh;
  double *ctm;
  SplashCoord mat[6];
  SplashOutMaskedImageData imgData;
  SplashOutImageMaskData imgMaskData;
  SplashColorMode srcMode;
  SplashBitmap *maskBitmap;
  Splash *maskSplash;
  SplashColor maskColor;
  GfxGray gray;
  GfxRGB rgb;
#if SPLASH_CMYK
  GfxCMYK cmyk;
#endif
  Guchar pix;
  int n, i;

  // If the mask is higher resolution than the image, use
  // drawSoftMaskedImage() instead.
  if (maskWidth > width || maskHeight > height) {
    decodeLow.initInt(maskInvert ? 0 : 1);
    decodeHigh.initInt(maskInvert ? 1 : 0);
    maskDecode.initArray(xref);
    maskDecode.arrayAdd(&decodeLow);
    maskDecode.arrayAdd(&decodeHigh);
    maskColorMap = new GfxImageColorMap(1, &maskDecode,
					new GfxDeviceGrayColorSpace());
    maskDecode.free();
    drawSoftMaskedImage(state, ref, str, width, height, colorMap,
			maskStr, maskWidth, maskHeight, maskColorMap);
    delete maskColorMap;

  } else {

    //----- scale the mask image to the same size as the source image

    mat[0] = (SplashCoord)width;
    mat[1] = 0;
    mat[2] = 0;
    mat[3] = (SplashCoord)height;
    mat[4] = 0;
    mat[5] = 0;
    imgMaskData.imgStr = new ImageStream(maskStr, maskWidth, 1, 1);
    imgMaskData.imgStr->reset();
    imgMaskData.invert = maskInvert ? 0 : 1;
    imgMaskData.width = maskWidth;
    imgMaskData.height = maskHeight;
    imgMaskData.y = 0;
    maskBitmap = new SplashBitmap(width, height, 1, splashModeMono1, gFalse);
    maskSplash = new Splash(maskBitmap, gFalse);
    maskColor[0] = 0;
    maskSplash->clear(maskColor);
    maskColor[0] = 0xff;
    maskSplash->setFillPattern(new SplashSolidColor(maskColor));
    maskSplash->fillImageMask(&imageMaskSrc, &imgMaskData,
			      maskWidth, maskHeight, mat, gFalse);
    delete imgMaskData.imgStr;
    maskStr->close();
    delete maskSplash;

    //----- draw the source image

    ctm = state->getCTM();
    mat[0] = ctm[0];
    mat[1] = ctm[1];
    mat[2] = -ctm[2];
    mat[3] = -ctm[3];
    mat[4] = ctm[2] + ctm[4];
    mat[5] = ctm[3] + ctm[5];

    imgData.imgStr = new ImageStream(str, width,
				     colorMap->getNumPixelComps(),
				     colorMap->getBits());
    imgData.imgStr->reset();
    imgData.colorMap = colorMap;
    imgData.mask = maskBitmap;
    imgData.colorMode = colorMode;
    imgData.width = width;
    imgData.height = height;
    imgData.y = 0;

    // special case for one-channel (monochrome/gray/separation) images:
    // build a lookup table here
    imgData.lookup = NULL;
    if (colorMap->getNumPixelComps() == 1) {
      n = 1 << colorMap->getBits();
      switch (colorMode) {
      case splashModeMono1:
      case splashModeMono8:
	imgData.lookup = (SplashColorPtr)gmalloc(n);
	for (i = 0; i < n; ++i) {
	  pix = (Guchar)i;
	  colorMap->getGray(&pix, &gray);
	  imgData.lookup[i] = colToByte(gray);
	}
	break;
      case splashModeRGB8:
      case splashModeBGR8:
	imgData.lookup = (SplashColorPtr)gmalloc(3 * n);
	for (i = 0; i < n; ++i) {
	  pix = (Guchar)i;
	  colorMap->getRGB(&pix, &rgb);
	  imgData.lookup[3*i] = colToByte(rgb.r);
	  imgData.lookup[3*i+1] = colToByte(rgb.g);
	  imgData.lookup[3*i+2] = colToByte(rgb.b);
	}
	break;
#if SPLASH_CMYK
      case splashModeCMYK8:
	imgData.lookup = (SplashColorPtr)gmalloc(4 * n);
	for (i = 0; i < n; ++i) {
	  pix = (Guchar)i;
	  colorMap->getCMYK(&pix, &cmyk);
	  imgData.lookup[4*i] = colToByte(cmyk.c);
	  imgData.lookup[4*i+1] = colToByte(cmyk.m);
	  imgData.lookup[4*i+2] = colToByte(cmyk.y);
	  imgData.lookup[4*i+3] = colToByte(cmyk.k);
	}
	break;
#endif
      }
    }

    if (colorMode == splashModeMono1) {
      srcMode = splashModeMono8;
    } else {
      srcMode = colorMode;
    }
    splash->drawImage(&maskedImageSrc, &imgData, srcMode, gTrue,
		      width, height, mat);

    delete maskBitmap;
    gfree(imgData.lookup);
    delete imgData.imgStr;
    str->close();
  }
}

void SplashOutputDev::drawSoftMaskedImage(GfxState *state, Object *ref,
					  Stream *str, int width, int height,
					  GfxImageColorMap *colorMap,
					  Stream *maskStr,
					  int maskWidth, int maskHeight,
					  GfxImageColorMap *maskColorMap) {
  double *ctm;
  SplashCoord mat[6];
  SplashOutImageData imgData;
  SplashOutImageData imgMaskData;
  SplashColorMode srcMode;
  SplashBitmap *maskBitmap;
  Splash *maskSplash;
  SplashColor maskColor;
  GfxGray gray;
  GfxRGB rgb;
#if SPLASH_CMYK
  GfxCMYK cmyk;
#endif
  Guchar pix;
  int n, i;

  ctm = state->getCTM();
  mat[0] = ctm[0];
  mat[1] = ctm[1];
  mat[2] = -ctm[2];
  mat[3] = -ctm[3];
  mat[4] = ctm[2] + ctm[4];
  mat[5] = ctm[3] + ctm[5];

  //----- set up the soft mask

  imgMaskData.imgStr = new ImageStream(maskStr, maskWidth,
				       maskColorMap->getNumPixelComps(),
				       maskColorMap->getBits());
  imgMaskData.imgStr->reset();
  imgMaskData.colorMap = maskColorMap;
  imgMaskData.maskColors = NULL;
  imgMaskData.colorMode = splashModeMono8;
  imgMaskData.width = maskWidth;
  imgMaskData.height = maskHeight;
  imgMaskData.y = 0;
  n = 1 << maskColorMap->getBits();
  imgMaskData.lookup = (SplashColorPtr)gmalloc(n);
  for (i = 0; i < n; ++i) {
    pix = (Guchar)i;
    maskColorMap->getGray(&pix, &gray);
    imgMaskData.lookup[i] = colToByte(gray);
  }
  maskBitmap = new SplashBitmap(bitmap->getWidth(), bitmap->getHeight(),
				1, splashModeMono8, gFalse);
  maskSplash = new Splash(maskBitmap, vectorAntialias);
  maskColor[0] = 0;
  maskSplash->clear(maskColor);
  maskSplash->drawImage(&imageSrc, &imgMaskData, splashModeMono8, gFalse,
			maskWidth, maskHeight, mat);
  delete imgMaskData.imgStr;
  maskStr->close();
  gfree(imgMaskData.lookup);
  delete maskSplash;
  splash->setSoftMask(maskBitmap);

  //----- draw the source image

  imgData.imgStr = new ImageStream(str, width,
				   colorMap->getNumPixelComps(),
				   colorMap->getBits());
  imgData.imgStr->reset();
  imgData.colorMap = colorMap;
  imgData.maskColors = NULL;
  imgData.colorMode = colorMode;
  imgData.width = width;
  imgData.height = height;
  imgData.y = 0;

  // special case for one-channel (monochrome/gray/separation) images:
  // build a lookup table here
  imgData.lookup = NULL;
  if (colorMap->getNumPixelComps() == 1) {
    n = 1 << colorMap->getBits();
    switch (colorMode) {
    case splashModeMono1:
    case splashModeMono8:
      imgData.lookup = (SplashColorPtr)gmalloc(n);
      for (i = 0; i < n; ++i) {
	pix = (Guchar)i;
	colorMap->getGray(&pix, &gray);
	imgData.lookup[i] = colToByte(gray);
      }
      break;
    case splashModeRGB8:
    case splashModeBGR8:
      imgData.lookup = (SplashColorPtr)gmalloc(3 * n);
      for (i = 0; i < n; ++i) {
	pix = (Guchar)i;
	colorMap->getRGB(&pix, &rgb);
	imgData.lookup[3*i] = colToByte(rgb.r);
	imgData.lookup[3*i+1] = colToByte(rgb.g);
	imgData.lookup[3*i+2] = colToByte(rgb.b);
      }
      break;
#if SPLASH_CMYK
    case splashModeCMYK8:
      imgData.lookup = (SplashColorPtr)gmalloc(4 * n);
      for (i = 0; i < n; ++i) {
	pix = (Guchar)i;
	colorMap->getCMYK(&pix, &cmyk);
	imgData.lookup[4*i] = colToByte(cmyk.c);
	imgData.lookup[4*i+1] = colToByte(cmyk.m);
	imgData.lookup[4*i+2] = colToByte(cmyk.y);
	imgData.lookup[4*i+3] = colToByte(cmyk.k);
      }
      break;
#endif
    }
  }

  if (colorMode == splashModeMono1) {
    srcMode = splashModeMono8;
  } else {
    srcMode = colorMode;
  }
  splash->drawImage(&imageSrc, &imgData, srcMode, gFalse, width, height, mat);

  splash->setSoftMask(NULL);
  gfree(imgData.lookup);
  delete imgData.imgStr;
  str->close();
}

void SplashOutputDev::beginTransparencyGroup(GfxState *state, double *bbox,
					     GfxColorSpace *blendingColorSpace,
					     GBool isolated, GBool knockout,
					     GBool forSoftMask) {
  SplashTransparencyGroup *transpGroup;
  SplashColor color;
  double xMin, yMin, xMax, yMax, x, y;
  int tx, ty, w, h;

  // transform the bbox
  state->transform(bbox[0], bbox[1], &x, &y);
  xMin = xMax = x;
  yMin = yMax = y;
  state->transform(bbox[0], bbox[3], &x, &y);
  if (x < xMin) {
    xMin = x;
  } else if (x > xMax) {
    xMax = x;
  }
  if (y < yMin) {
    yMin = y;
  } else if (y > yMax) {
    yMax = y;
  }
  state->transform(bbox[2], bbox[1], &x, &y);
  if (x < xMin) {
    xMin = x;
  } else if (x > xMax) {
    xMax = x;
  }
  if (y < yMin) {
    yMin = y;
  } else if (y > yMax) {
    yMax = y;
  }
  state->transform(bbox[2], bbox[3], &x, &y);
  if (x < xMin) {
    xMin = x;
  } else if (x > xMax) {
    xMax = x;
  }
  if (y < yMin) {
    yMin = y;
  } else if (y > yMax) {
    yMax = y;
  }
  tx = (int)floor(xMin);
  if (tx < 0) {
    tx = 0;
  } else if (tx > bitmap->getWidth()) {
    tx = bitmap->getWidth();
  }
  ty = (int)floor(yMin);
  if (ty < 0) {
    ty = 0;
  } else if (ty > bitmap->getHeight()) {
    ty = bitmap->getHeight();
  }
  w = (int)ceil(xMax) - tx + 1;
  if (tx + w > bitmap->getWidth()) {
    w = bitmap->getWidth() - tx;
  }
  if (w < 1) {
    w = 1;
  }
  h = (int)ceil(yMax) - ty + 1;
  if (ty + h > bitmap->getHeight()) {
    h = bitmap->getHeight() - ty;
  }
  if (h < 1) {
    h = 1;
  }

  // push a new stack entry
  transpGroup = new SplashTransparencyGroup();
  transpGroup->tx = tx;
  transpGroup->ty = ty;
  transpGroup->blendingColorSpace = blendingColorSpace;
  transpGroup->isolated = isolated;
  transpGroup->next = transpGroupStack;
  transpGroupStack = transpGroup;

  // save state
  transpGroup->origBitmap = bitmap;
  transpGroup->origSplash = splash;

  //~ this ignores the blendingColorSpace arg

  // create the temporary bitmap
  bitmap = new SplashBitmap(w, h, bitmapRowPad, colorMode, gTrue,
			    bitmapTopDown); 
  splash = new Splash(bitmap, vectorAntialias,
		      transpGroup->origSplash->getScreen());
  if (isolated) {
    switch (colorMode) {
    case splashModeMono1:
    case splashModeMono8:
      color[0] = 0;
      break;
    case splashModeRGB8:
    case splashModeBGR8:
      color[0] = color[1] = color[2] = 0;
      break;
#if SPLASH_CMYK
    case splashModeCMYK8:
      color[0] = color[1] = color[2] = color[3] = 0;