splash.cc

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	p[3] = (alpha2 * blend[3] + ialpha2 * p[3]) >> 8;
	break;
#if SPLASH_CMYK
      case splashModeACMYK8:
	p = &bitmap->data[y * bitmap->rowSize + 5 * x];
	(*blendFunc)(color, p, blend, bitmap->mode);
	p[0] = (alpha2 * blend[0] + ialpha2 * p[0]) >> 8;
	p[1] = (alpha2 * blend[1] + ialpha2 * p[1]) >> 8;
	p[2] = (alpha2 * blend[2] + ialpha2 * p[2]) >> 8;
	p[3] = (alpha2 * blend[3] + ialpha2 * p[3]) >> 8;
	p[4] = (alpha2 * blend[4] + ialpha2 * p[4]) >> 8;
	break;
#endif
      }
    } else {
      switch (bitmap->mode) {
      case splashModeMono1:
	p = &bitmap->data[y * bitmap->rowSize + (x >> 3)];
	if (color[0]) {
	  *p |= 0x80 >> (x & 7);
	} else {
	  *p &= ~(0x80 >> (x & 7));
	}
	break;
      case splashModeMono8:
	p = &bitmap->data[y * bitmap->rowSize + x];
	p[0] = color[0];
	break;
      case splashModeAMono8:
	p = &bitmap->data[y * bitmap->rowSize + 2 * x];
	p[0] = color[0];
	p[1] = color[1];
	break;
      case splashModeRGB8:
      case splashModeBGR8:
	p = &bitmap->data[y * bitmap->rowSize + 3 * x];
	p[0] = color[0];
	p[1] = color[1];
	p[2] = color[2];
	break;
      case splashModeARGB8:
      case splashModeBGRA8:
#if SPLASH_CMYK
      case splashModeCMYK8:
#endif
	p = &bitmap->data[y * bitmap->rowSize + 4 * x];
	p[0] = color[0];
	p[1] = color[1];
	p[2] = color[2];
	p[3] = color[3];
	break;
#if SPLASH_CMYK
      case splashModeACMYK8:
	p = &bitmap->data[y * bitmap->rowSize + 5 * x];
	p[0] = color[0];
	p[1] = color[1];
	p[2] = color[2];
	p[3] = color[3];
	p[4] = color[4];
	break;
#endif
      }
    }
    updateModX(x);
    updateModY(y);
  }
}

void Splash::drawPixel(int x, int y, SplashPattern *pattern,
		       SplashCoord alpha, GBool noClip) {
  SplashBlendFunc blendFunc;
  SplashColor color;
  SplashColorPtr p;
  SplashColor dest, blend;
  int alpha2, ialpha2;
  Guchar t;

  if (noClip || state->clip->test(x, y)) {
    if (alpha != 1 || softMask || state->blendFunc) {
      blendFunc = state->blendFunc ? state->blendFunc : &blendNormal;
      pattern->getColor(x, y, color);
      if (softMask) {
	alpha2 = (int)(alpha * softMask->data[y * softMask->rowSize + x]);
      } else {
	alpha2 = (int)(alpha * 255);
      }
      ialpha2 = 255 - alpha2;
      switch (bitmap->mode) {
      case splashModeMono1:
	p = &bitmap->data[y * bitmap->rowSize + (x >> 3)];
	dest[0] = (*p >> (7 - (x & 7))) & 1;
	(*blendFunc)(color, dest, blend, bitmap->mode);
	t = (alpha2 * blend[0] + ialpha2 * dest[0]) >> 8;
	if (t) {
	  *p |= 0x80 >> (x & 7);
	} else {
	  *p &= ~(0x80 >> (x & 7));
	}
	break;
      case splashModeMono8:
	p = &bitmap->data[y * bitmap->rowSize + x];
	(*blendFunc)(color, p, blend, bitmap->mode);
	// note: floor(x / 255) = x >> 8 (for 16-bit x)
	p[0] = (alpha2 * blend[0] + ialpha2 * p[0]) >> 8;
	break;
      case splashModeAMono8:
	p = &bitmap->data[y * bitmap->rowSize + 2 * x];
	(*blendFunc)(color, p, blend, bitmap->mode);
	p[0] = (alpha2 * blend[0] + ialpha2 * p[0]) >> 8;
	p[1] = (alpha2 * blend[1] + ialpha2 * p[1]) >> 8;
	break;
      case splashModeRGB8:
      case splashModeBGR8:
	p = &bitmap->data[y * bitmap->rowSize + 3 * x];
	(*blendFunc)(color, p, blend, bitmap->mode);
	p[0] = (alpha2 * blend[0] + ialpha2 * p[0]) >> 8;
	p[1] = (alpha2 * blend[1] + ialpha2 * p[1]) >> 8;
	p[2] = (alpha2 * blend[2] + ialpha2 * p[2]) >> 8;
	break;
      case splashModeARGB8:
      case splashModeBGRA8:
#if SPLASH_CMYK
      case splashModeCMYK8:
#endif
	p = &bitmap->data[y * bitmap->rowSize + 4 * x];
	(*blendFunc)(color, p, blend, bitmap->mode);
	p[0] = (alpha2 * blend[0] + ialpha2 * p[0]) >> 8;
	p[1] = (alpha2 * blend[1] + ialpha2 * p[1]) >> 8;
	p[2] = (alpha2 * blend[2] + ialpha2 * p[2]) >> 8;
	p[3] = (alpha2 * blend[3] + ialpha2 * p[3]) >> 8;
	break;
#if SPLASH_CMYK
      case splashModeACMYK8:
	p = &bitmap->data[y * bitmap->rowSize + 5 * x];
	(*blendFunc)(color, p, blend, bitmap->mode);
	p[0] = (alpha2 * blend[0] + ialpha2 * p[0]) >> 8;
	p[1] = (alpha2 * blend[1] + ialpha2 * p[1]) >> 8;
	p[2] = (alpha2 * blend[2] + ialpha2 * p[2]) >> 8;
	p[3] = (alpha2 * blend[3] + ialpha2 * p[3]) >> 8;
	p[4] = (alpha2 * blend[4] + ialpha2 * p[4]) >> 8;
	break;
#endif
      }
    } else {
      pattern->getColor(x, y, color);
      switch (bitmap->mode) {
      case splashModeMono1:
	p = &bitmap->data[y * bitmap->rowSize + (x >> 3)];
	if (color[0]) {
	  *p |= 0x80 >> (x & 7);
	} else {
	  *p &= ~(0x80 >> (x & 7));
	}
	break;
      case splashModeMono8:
	p = &bitmap->data[y * bitmap->rowSize + x];
	p[0] = color[0];
	break;
      case splashModeAMono8:
	p = &bitmap->data[y * bitmap->rowSize + 2 * x];
	p[0] = color[0];
	p[1] = color[1];
	break;
      case splashModeRGB8:
      case splashModeBGR8:
	p = &bitmap->data[y * bitmap->rowSize + 3 * x];
	p[0] = color[0];
	p[1] = color[1];
	p[2] = color[2];
	break;
      case splashModeARGB8:
      case splashModeBGRA8:
#if SPLASH_CMYK
      case splashModeCMYK8:
#endif
	p = &bitmap->data[y * bitmap->rowSize + 4 * x];
	p[0] = color[0];
	p[1] = color[1];
	p[2] = color[2];
	p[3] = color[3];
	break;
#if SPLASH_CMYK
      case splashModeACMYK8:
	p = &bitmap->data[y * bitmap->rowSize + 5 * x];
	p[0] = color[0];
	p[1] = color[1];
	p[2] = color[2];
	p[3] = color[3];
	p[4] = color[4];
	break;
#endif
      }
    }
    updateModX(x);
    updateModY(y);
  }
}

void Splash::drawSpan(int x0, int x1, int y, SplashPattern *pattern,
		      SplashCoord alpha, GBool noClip) {
  SplashBlendFunc blendFunc;
  SplashColor color;
  SplashColorPtr p;
  SplashColor dest, blend;
  Guchar mask, t;
  int alpha2, ialpha2;
  int i, j, n;

  n = x1 - x0 + 1;

  if (noClip) {
    updateModX(x0);
    updateModX(x1);
    updateModY(y);
  }

  if (alpha != 1 || softMask || state->blendFunc) {
    blendFunc = state->blendFunc ? state->blendFunc : &blendNormal;
    if (softMask) {
      alpha2 = ialpha2 = 0; // make gcc happy
    } else {
      alpha2 = (int)(alpha * 255);
      ialpha2 = 255 - alpha2;
    }
    switch (bitmap->mode) {
    case splashModeMono1:
      p = &bitmap->data[y * bitmap->rowSize + (x0 >> 3)];
      i = 0;
      if (pattern->isStatic()) {
	pattern->getColor(0, 0, color);
	if ((j = x0 & 7)) {
	  mask = 0x80 >> j;
	  for (; j < 8 && i < n; ++i, ++j) {
	    if (noClip || state->clip->test(x0 + i, y)) {
	      if (softMask) {
		alpha2 = (int)(alpha *
			       softMask->data[y * softMask->rowSize + x0 + i]);
		ialpha2 = 255 - alpha2;
	      }
	      dest[0] = (*p >> (7 - j)) & 1;
	      (*blendFunc)(color, dest, blend, bitmap->mode);
	      t = (alpha2 * blend[0] + ialpha2 * dest[0]) >> 8;
	      if (t) {
		*p |= mask;
	      } else {
		*p &= ~mask;
	      }
	      if (!noClip) {
		updateModX(x0 + i);
		updateModY(y);
	      }
	    }
	    mask >>= 1;
	  }
	  ++p;
	}
	while (i < n) {
	  mask = 0x80;
	  for (j = 0; j < 8 && i < n; ++i, ++j) {
	    if (noClip || state->clip->test(x0 + i, y)) {
	      if (softMask) {
		alpha2 = (int)(alpha *
			       softMask->data[y * softMask->rowSize + x0 + i]);
		ialpha2 = 255 - alpha2;
	      }
	      dest[0] = (*p >> (7 - j)) & 1;
	      (*blendFunc)(color, dest, blend, bitmap->mode);
	      t = (alpha2 * blend[0] + ialpha2 * dest[0]) >> 8;
	      if (t) {
		*p |= mask;
	      } else {
		*p &= ~mask;
	      }
	      if (!noClip) {
		updateModX(x0 + i);
		updateModY(y);
	      }
	    }
	    mask >>= 1;
	  }
	  ++p;
	}
      } else {
	if ((j = x0 & 7)) {
	  mask = 0x80 >> j;
	  for (; j < 8 && i < n; ++i, ++j) {
	    if (noClip || state->clip->test(x0 + i, y)) {
	      pattern->getColor(x0 + i, y, color);
	      if (softMask) {
		alpha2 = (int)(alpha *
			       softMask->data[y * softMask->rowSize + x0 + i]);
		ialpha2 = 255 - alpha2;
	      }
	      dest[0] = (*p >> (7 - j)) & 1;
	      (*blendFunc)(color, dest, blend, bitmap->mode);
	      t = (alpha2 * blend[0] + ialpha2 * dest[0]) >> 8;
	      if (t) {
		*p |= mask;
	      } else {
		*p &= ~mask;
	      }
	      if (!noClip) {
		updateModX(x0 + i);
		updateModY(y);
	      }
	    }
	    mask >>= 1;
	  }
	  ++p;
	}
	while (i < n) {
	  mask = 0x80;
	  for (j = 0; j < 8 && i < n; ++i, ++j) {
	    if (noClip || state->clip->test(x0 + i, y)) {
	      pattern->getColor(x0 + i, y, color);
	      if (softMask) {
		alpha2 = (int)(alpha *
			       softMask->data[y * softMask->rowSize + x0 + i]);
		ialpha2 = 255 - alpha2;
	      }
	      dest[0] = (*p >> (7 - j)) & 1;
	      (*blendFunc)(color, dest, blend, bitmap->mode);
	      t = (alpha2 * blend[0] + ialpha2 * dest[0]) >> 8;
	      if (t) {
		*p |= mask;
	      } else {
		*p &= ~mask;
	      }
	      if (!noClip) {
		updateModX(x0 + i);
		updateModY(y);
	      }
	    }
	    mask >>= 1;
	  }
	  ++p;
	}
      }
      break;

    case splashModeMono8:
      p = &bitmap->data[y * bitmap->rowSize + x0];
      if (pattern->isStatic()) {
	pattern->getColor(0, 0, color);
	for (i = 0; i < n; ++i) {
	  if (noClip || state->clip->test(x0 + i, y)) {
	    if (softMask) {
	      alpha2 = (int)(alpha *
			     softMask->data[y * softMask->rowSize + x0 + i]);
	      ialpha2 = 255 - alpha2;
	    }
	    (*blendFunc)(color, p, blend, bitmap->mode);
	    *p = (alpha2 * blend[0] + ialpha2 * *p) >> 8;
	    if (!noClip) {
	      updateModX(x0 + i);
	      updateModY(y);
	    }
	  }
	  ++p;
	}
      } else {
	for (i = 0; i < n; ++i) {
	  if (noClip || state->clip->test(x0 + i, y)) {
	    pattern->getColor(x0 + i, y, color);
	    if (softMask) {
	      alpha2 = (int)(alpha *
			     softMask->data[y * softMask->rowSize + x0 + i]);
	      ialpha2 = 255 - alpha2;
	    }
	    (*blendFunc)(color, p, blend, bitmap->mode);
	    *p = (alpha2 * blend[0] + ialpha2 * *p) >> 8;
	    if (!noClip) {
	      updateModX(x0 + i);
	      updateModY(y);
	    }
	  }
	  ++p;
	}
      }
      break;

    case splashModeAMono8:
      p = &bitmap->data[y * bitmap->rowSize + 2 * x0];
      if (pattern->isStatic()) {
	pattern->getColor(0, 0, color);
	for (i = 0; i < n; ++i) {
	  if (noClip || state->clip->test(x0 + i, y)) {
	    if (softMask) {
	      alpha2 = (int)(alpha *
			     softMask->data[y * softMask->rowSize + x0 + i]);
	      ialpha2 = 255 - alpha2;
	    }
	    (*blendFunc)(color, p, blend, bitmap->mode);
	    p[0] = (alpha2 * blend[0] + ialpha2 * p[0]) >> 8;
	    p[1] = (alpha2 * blend[1] + ialpha2 * p[1]) >> 8;
	    if (!noClip) {
	      updateModX(x0 + i);
	      updateModY(y);
	    }
	  }
	  p += 2;
	}
      } else {
	for (i = 0; i < n; ++i) {
	  if (noClip || state->clip->test(x0 + i, y)) {
	    pattern->getColor(x0 + i, y, color);
	    if (softMask) {
	      alpha2 = (int)(alpha *
			     softMask->data[y * softMask->rowSize + x0 + i]);
	      ialpha2 = 255 - alpha2;
	    }
	    (*blendFunc)(color, p, blend, bitmap->mode);
	    p[0] = (alpha2 * blend[0] + ialpha2 * p[0]) >> 8;
	    p[1] = (alpha2 * blend[1] + ialpha2 * p[1]) >> 8;
	    if (!noClip) {
	      updateModX(x0 + i);
	      updateModY(y);
	    }
	  }
	  p += 2;
	}
      }
      break;

    case splashModeRGB8:
    case splashModeBGR8:
      p = &bitmap->data[y * bitmap->rowSize + 3 * x0];
      if (pattern->isStatic()) {
	pattern->getColor(0, 0, color);
	for (i = 0; i < n; ++i) {
	  if (noClip || state->clip->test(x0 + i, y)) {
	    if (softMask) {
	      alpha2 = (int)(alpha *
			     softMask->data[y * softMask->rowSize + x0 + i]);
	      ialpha2 = 255 - alpha2;
	    }
	    (*blendFunc)(color, p, blend, bitmap->mode);
	    p[0] = (alpha2 * blend[0] + ialpha2 * p[0]) >> 8;
	    p[1] = (alpha2 * blend[1] + ialpha2 * p[1]) >> 8;
	    p[2] = (alpha2 * blend[2] + ialpha2 * p[2]) >> 8;
	    if (!noClip) {
	      updateModX(x0 + i);
	      updateModY(y);
	    }
	  }
	  p += 3;
	}
      } else {
	for (i = 0; i < n; ++i) {
	  if (noClip || state->clip->test(x0 + i, y)) {
	    pattern->getColor(x0 + i, y, color);
	    if (softMask) {
	      alpha2 = (int)(alpha *
			     softMask->data[y * softMask->rowSize + x0 + i]);
	      ialpha2 = 255 - alpha2;
	    }
	    (*blendFunc)(color, p, blend, bitmap->mode);
	    p[0] = (alpha2 * blend[0] + ialpha2 * p[0]) >> 8;
	    p[1] = (alpha2 * blend[1] + ialpha2 * p[1]) >> 8;
	    p[2] = (alpha2 * blend[2] + ialpha2 * p[2]) >> 8;
	    if (!noClip) {
	      updateModX(x0 + i);
	      updateModY(y);
	    }
	  }
	  p += 3;
	}
      }
      break;

    case splashModeARGB8:
    case splashModeBGRA8:
#if SPLASH_CMYK
    case splashModeCMYK8:
#endif
      p = &bitmap->data[y * bitmap->rowSize + 4 * x0];
      if (pattern->isStatic()) {
	pattern->getColor(0, 0, color);
	for (i = 0; i < n; ++i) {
	  if (noClip || state->clip->test(x0 + i, y)) {
	    if (softMask) {
	      alpha2 = (int)(alpha *
			     softMask->data[y * softMask->rowSize + x0 + i]);
	      ialpha2 = 255 - alpha2;
	    }
	    (*blendFunc)(color, p, blend, bitmap->mode);
	    p[0] = (alpha2 * blend[0] + ialpha2 * p[0]) >> 8;
	    p[1] = (alpha2 * blend[1] + ialpha2 * p[1]) >> 8;
	    p[2] = (alpha2 * blend[2] + ialpha2 * p[2]) >> 8;
	    p[3] = (alpha2 * blend[3] + ialpha2 * p[3]) >> 8;
	    if (!noClip) {
	      updateModX(x0 + i);