File level_D_16_bit.patch of Package iscan

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File level_D_16_bit.patch of Package iscan

*** backend/epkowa.c.orig	2008-05-18 21:12:02.000000000 +0100
--- backend/epkowa.c	2008-05-18 21:12:14.000000000 +0100
***************
*** 1513,1516 ****
--- 1513,1518 ----
  
  static void color_correct (SANE_Byte * data, SANE_Int size, double *profile);
+ static void color_correct_16 (SANE_Byte * data, SANE_Int size,
+ 			      double *profile);
  
  static void handle_mode (Epson_Scanner * s, SANE_Int optindex,
***************
*** 4912,4952 ****
  {
    SANE_Int i, width;
!   SANE_Byte *r_buf, *g_buf, *b_buf;
    double red, grn, blu;
  
    width = size / 3;
! 
!   for (i = 0; i < size / 3; i++)
    {
!     r_buf = data;
!     g_buf = data + 1;
!     b_buf = data + 2;
! 
!     red =
!       profile[0] * (*r_buf) + profile[1] * (*g_buf) + profile[2] * (*b_buf);
!     grn =
!       profile[3] * (*r_buf) + profile[4] * (*g_buf) + profile[5] * (*b_buf);
!     blu =
!       profile[6] * (*r_buf) + profile[7] * (*g_buf) + profile[8] * (*b_buf);
! 
!     if (255. < red)
!       red = 255.;
!     if (0 > red)
!       red = 0.;
!     if (255. < grn)
!       grn = 255.;
!     if (0 > grn)
!       grn = 0.;
!     if (255. < blu)
!       blu = 255.;
!     if (0 > blu)
!       blu = 0.;
! 
!     *data++ = (unsigned char) (red);
!     *data++ = (unsigned char) (grn);
!     *data++ = (unsigned char) (blu);
    }
  }
  
  static void
  handle_depth_halftone (Epson_Scanner * s, SANE_Int optindex,
--- 4914,4971 ----
  {
    SANE_Int i, width;
!   SANE_Byte r, g, b;
    double red, grn, blu;
  
+   DBG (5, "color_correct: begin\n");
    width = size / 3;
!   for (i = 0; i < width; i++)
    {
!     r = data[0];
!     g = data[1];
!     b = data[2];
! 
!     red = profile[0] * r + profile[1] * g + profile[2] * b;
!     grn = profile[3] * r + profile[4] * g + profile[5] * b;
!     blu = profile[6] * r + profile[7] * g + profile[8] * b;
! 
!     *data++ = red < 0 ? 0 : (red > 255 ? 255 : (unsigned char) red);
!     *data++ = grn < 0 ? 0 : (grn > 255 ? 255 : (unsigned char) grn);
!     *data++ = blu < 0 ? 0 : (blu > 255 ? 255 : (unsigned char) blu);
!   }
! }
! 
! static void
! color_correct_16 (SANE_Byte * data, SANE_Int size, double *profile)
! /* Performs the linear transformation of color space for data with
!  * 16 bits per gun, under the assumption of little endian data. */
! {
!   SANE_Int i, j, width;
!   int r, g, b, c;
!   double *profilerow;
! 
!   DBG (5, "color_correct_16: begin\n");
!   width = size / 6;
!   for (i = 0; i < width; i++)
!   {
!     r = data[1] << 8 | data[0];
!     g = data[3] << 8 | data[2];
!     b = data[5] << 8 | data[4];
! 
!     profilerow = profile;
!     for (j = 0; j < 3; j++, profilerow += 3)
!     {
!       /* The new value cannot possibly be outside the range of an int */
!       c = (int) (profilerow[0] * r + profilerow[1] * g + profilerow[2] * b);
!       if (c < 0)
! 	c = 0;
!       else if (c > 0xffff)
! 	c = 0xffff;
!       *data++ = c & 0xff;
!       *data++ = c >> 8;
!     }
    }
  }
  
+ 
  static void
  handle_depth_halftone (Epson_Scanner * s, SANE_Int optindex,
***************
*** 7034,7038 ****
        cct[8] = SANE_UNFIX (s->val[OPT_CCT_9].w);
  
!       color_correct (s->ptr, s->end - s->ptr, cct);
      }
  
--- 7053,7060 ----
        cct[8] = SANE_UNFIX (s->val[OPT_CCT_9].w);
  
!       if (s->params.depth > 8)
! 	color_correct_16 (s->ptr, s->end - s->ptr, cct);
!       else
! 	color_correct (s->ptr, s->end - s->ptr, cct);
      }

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File level_D_16_bit.patch of Package iscan

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