Alien-FreeImage

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src/Source/LibPNG/png.c  view on Meta::CPAN

      if (png_muldiv(&XYZ->blue_Y, XYZ->blue_Y, PNG_FP_1, Y) == 0)
         return 1;
      if (png_muldiv(&XYZ->blue_Z, XYZ->blue_Z, PNG_FP_1, Y) == 0)
         return 1;
   }

   return 0;
}

static int
png_colorspace_endpoints_match(const png_xy *xy1, const png_xy *xy2, int delta)
{
   /* Allow an error of +/-0.01 (absolute value) on each chromaticity */
   if (PNG_OUT_OF_RANGE(xy1->whitex, xy2->whitex,delta) ||
       PNG_OUT_OF_RANGE(xy1->whitey, xy2->whitey,delta) ||
       PNG_OUT_OF_RANGE(xy1->redx,   xy2->redx,  delta) ||
       PNG_OUT_OF_RANGE(xy1->redy,   xy2->redy,  delta) ||
       PNG_OUT_OF_RANGE(xy1->greenx, xy2->greenx,delta) ||
       PNG_OUT_OF_RANGE(xy1->greeny, xy2->greeny,delta) ||
       PNG_OUT_OF_RANGE(xy1->bluex,  xy2->bluex, delta) ||
       PNG_OUT_OF_RANGE(xy1->bluey,  xy2->bluey, delta))

src/Source/LibPNG/png.c  view on Meta::CPAN

 * arithmetic inaccuracies when calculations are performed on them.  The new
 * check is to round-trip xy -> XYZ -> xy and then check that the result is
 * within a small percentage of the original.
 */
static int
png_colorspace_check_xy(png_XYZ *XYZ, const png_xy *xy)
{
   int result;
   png_xy xy_test;

   /* As a side-effect this routine also returns the XYZ endpoints. */
   result = png_XYZ_from_xy(XYZ, xy);
   if (result != 0)
      return result;

   result = png_xy_from_XYZ(&xy_test, XYZ);
   if (result != 0)
      return result;

   if (png_colorspace_endpoints_match(xy, &xy_test,
       5/*actually, the math is pretty accurate*/) != 0)
      return 0;

   /* Too much slip */
   return 1;
}

/* This is the check going the other way.  The XYZ is modified to normalize it
 * (another side-effect) and the xy chromaticities are returned.
 */

src/Source/LibPNG/png.c  view on Meta::CPAN

      return result;

   result = png_xy_from_XYZ(xy, XYZ);
   if (result != 0)
      return result;

   XYZtemp = *XYZ;
   return png_colorspace_check_xy(&XYZtemp, xy);
}

/* Used to check for an endpoint match against sRGB */
static const png_xy sRGB_xy = /* From ITU-R BT.709-3 */
{
   /* color      x       y */
   /* red   */ 64000, 33000,
   /* green */ 30000, 60000,
   /* blue  */ 15000,  6000,
   /* white */ 31270, 32900
};

static int

src/Source/LibPNG/png.c  view on Meta::CPAN

   /* The consistency check is performed on the chromaticities; this factors out
    * variations because of the normalization (or not) of the end point Y
    * values.
    */
   if (preferred < 2 &&
       (colorspace->flags & PNG_COLORSPACE_HAVE_ENDPOINTS) != 0)
   {
      /* The end points must be reasonably close to any we already have.  The
       * following allows an error of up to +/-.001
       */
      if (png_colorspace_endpoints_match(xy, &colorspace->end_points_xy,
          100) == 0)
      {
         colorspace->flags |= PNG_COLORSPACE_INVALID;
         png_benign_error(png_ptr, "inconsistent chromaticities");
         return 0; /* failed */
      }

      /* Only overwrite with preferred values */
      if (preferred == 0)
         return 1; /* ok, but no change */
   }

   colorspace->end_points_xy = *xy;
   colorspace->end_points_XYZ = *XYZ;
   colorspace->flags |= PNG_COLORSPACE_HAVE_ENDPOINTS;

   /* The end points are normally quoted to two decimal digits, so allow +/-0.01
    * on this test.
    */
   if (png_colorspace_endpoints_match(xy, &sRGB_xy, 1000) != 0)
      colorspace->flags |= PNG_COLORSPACE_ENDPOINTS_MATCH_sRGB;

   else
      colorspace->flags &= PNG_COLORSPACE_CANCEL(
         PNG_COLORSPACE_ENDPOINTS_MATCH_sRGB);

   return 2; /* ok and changed */
}

int /* PRIVATE */

src/Source/LibPNG/png.c  view on Meta::CPAN

          */
         colorspace->flags |= PNG_COLORSPACE_INVALID;
         png_error(png_ptr, "internal error checking chromaticities");
         break;
   }

   return 0; /* failed */
}

int /* PRIVATE */
png_colorspace_set_endpoints(png_const_structrp png_ptr,
   png_colorspacerp colorspace, const png_XYZ *XYZ_in, int preferred)
{
   png_XYZ XYZ = *XYZ_in;
   png_xy xy;

   switch (png_colorspace_check_XYZ(&xy, &XYZ))
   {
      case 0:
         return png_colorspace_set_xy_and_XYZ(png_ptr, colorspace, &xy, &XYZ,
            preferred);

src/Source/LibPNG/png.c  view on Meta::CPAN

   if ((colorspace->flags & PNG_COLORSPACE_FROM_sRGB) != 0)
   {
      png_benign_error(png_ptr, "duplicate sRGB information ignored");
      return 0;
   }

   /* If the standard sRGB cHRM chunk does not match the one from the PNG file
    * warn but overwrite the value with the correct one.
    */
   if ((colorspace->flags & PNG_COLORSPACE_HAVE_ENDPOINTS) != 0 &&
      !png_colorspace_endpoints_match(&sRGB_xy, &colorspace->end_points_xy,
         100))
      png_chunk_report(png_ptr, "cHRM chunk does not match sRGB",
         PNG_CHUNK_ERROR);

   /* This check is just done for the error reporting - the routine always
    * returns true when the 'from' argument corresponds to sRGB (2).
    */
   (void)png_colorspace_check_gamma(png_ptr, colorspace, PNG_GAMMA_sRGB_INVERSE,
      2/*from sRGB*/);

   /* intent: bugs in GCC force 'int' to be used as the parameter type. */
   colorspace->rendering_intent = (png_uint_16)intent;
   colorspace->flags |= PNG_COLORSPACE_HAVE_INTENT;

   /* endpoints */
   colorspace->end_points_xy = sRGB_xy;
   colorspace->end_points_XYZ = sRGB_XYZ;
   colorspace->flags |=
      (PNG_COLORSPACE_HAVE_ENDPOINTS|PNG_COLORSPACE_ENDPOINTS_MATCH_sRGB);

   /* gamma */
   colorspace->gamma = PNG_GAMMA_sRGB_INVERSE;
   colorspace->flags |= PNG_COLORSPACE_HAVE_GAMMA;

   /* Finally record that we have an sRGB profile */

src/Source/LibPNG/pngpriv.h  view on Meta::CPAN

/* Added at libpng version 1.4.0 */
#ifdef PNG_COLORSPACE_SUPPORTED
/* These internal functions are for maintaining the colorspace structure within
 * a png_info or png_struct (or, indeed, both).
 */
PNG_INTERNAL_FUNCTION(int,png_colorspace_set_chromaticities,
   (png_const_structrp png_ptr, png_colorspacerp colorspace, const png_xy *xy,
    int preferred), PNG_EMPTY);

PNG_INTERNAL_FUNCTION(int,png_colorspace_set_endpoints,
   (png_const_structrp png_ptr, png_colorspacerp colorspace, const png_XYZ *XYZ,
    int preferred), PNG_EMPTY);

#ifdef PNG_sRGB_SUPPORTED
PNG_INTERNAL_FUNCTION(int,png_colorspace_set_sRGB,(png_const_structrp png_ptr,
   png_colorspacerp colorspace, int intent), PNG_EMPTY);
   /* This does set the colorspace gAMA and cHRM values too, but doesn't set the
    * flags to write them, if it returns false there was a problem and an error
    * message has already been output (but the colorspace may still need to be
    * synced to record the invalid flag).

src/Source/LibPNG/pngread.c  view on Meta::CPAN

   /* Do this the fast way; just read directly out of png_struct. */
   image->width = png_ptr->width;
   image->height = png_ptr->height;

   {
      png_uint_32 format = png_image_format(png_ptr);

      image->format = format;

#ifdef PNG_COLORSPACE_SUPPORTED
      /* Does the colorspace match sRGB?  If there is no color endpoint
       * (colorant) information assume yes, otherwise require the
       * 'ENDPOINTS_MATCHP_sRGB' colorspace flag to have been set.  If the
       * colorspace has been determined to be invalid ignore it.
       */
      if ((format & PNG_FORMAT_FLAG_COLOR) != 0 && ((png_ptr->colorspace.flags
         & (PNG_COLORSPACE_HAVE_ENDPOINTS|PNG_COLORSPACE_ENDPOINTS_MATCH_sRGB|
            PNG_COLORSPACE_INVALID)) == PNG_COLORSPACE_HAVE_ENDPOINTS))
         image->flags |= PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB;
#endif
   }

src/Source/LibPNG/pngset.c  view on Meta::CPAN

   XYZ.red_X = int_red_X;
   XYZ.red_Y = int_red_Y;
   XYZ.red_Z = int_red_Z;
   XYZ.green_X = int_green_X;
   XYZ.green_Y = int_green_Y;
   XYZ.green_Z = int_green_Z;
   XYZ.blue_X = int_blue_X;
   XYZ.blue_Y = int_blue_Y;
   XYZ.blue_Z = int_blue_Z;

   if (png_colorspace_set_endpoints(png_ptr, &info_ptr->colorspace,
       &XYZ, 2) != 0)
      info_ptr->colorspace.flags |= PNG_COLORSPACE_FROM_cHRM;

   png_colorspace_sync_info(png_ptr, info_ptr);
}

#  ifdef PNG_FLOATING_POINT_SUPPORTED
void PNGAPI
png_set_cHRM(png_const_structrp png_ptr, png_inforp info_ptr,
    double white_x, double white_y, double red_x, double red_y,

src/Whatsnew.txt  view on Meta::CPAN

+ [Herve Drolon] added JPEG_EXIFROTATE load flag to the JPEG plugin
+ [Herve Drolon] added 16-bit RGB(A) and float RGB(A)F support to FreeImage_GetChannel / FreeImage_SetChannel 
+ [Herve Drolon] added src FIT_RGBA16 to dst 32-bit FIT_BITMAP conversion to FreeImage_ConvertToType
* [Carsten Klein] FreeImage_Copy now copies transparency info, resolution info, ICC profile and metadata
* [Carsten Klein] check for negative top/left values in FreeImage_Paste
* [Christian Heimes] changed exceptions with a "catch(char *text)" to a "catch(const char *text)" to make GCC 4.1 happy
* [Deif Lou] fixed a bug in FreeImage_SetTransparentIndex
* [Thomas Maiwald] BMP plugin: on saving, fixed correct setting of bfSize BMP file header for palettized images
* [Timothy Lee] fixed handling of frame disposal in GIF_PLAYBACK mode (GIF plugin)
* [Herve Drolon] fixed handling of Exif Olympus Type 2 maker notes (not yet supported but now safely ignored)
* [Rich Geldreich] fixed DXT1 color endpoint precision problem in DDS plugin
* [Mihail Naydenov] improved loading speed of 24-bit targa images
* [Eugene Golushkov] improved big endian / little endian swapping functions
* [Carsten Klein/Jean-Philippe Goerke] improved FreeImage_SetMetadata / FreeImage_GetMetadata accessors
* [Christian Ruppert] improved Linux Makefiles
* [Eugene Golushkov] fixed PluginBMP alignment bug while saving 16 or 24bit BMP on big endian or Apple machines

July 28th, 2008 - 3.11.0
! FreeImage now uses libTIFF 3.9.0beta (CVS patch 2008-05-24)
! FreeImage now uses OpenJPEG 1.3.0 (SVN patch 2008-05-22)
! FreeImage now uses libMNG 1.0.10