/**
* Construct a new imagelist object from a list of images.
*
* No Ruby usage (internal function)
*
* Notes:
* - Sets \@scene to 0.
*
* @param images the images
* @return a new imagelist
* @see images_from_imagelist
*/
VALUE
rm_imagelist_from_images(Image *images)
{
VALUE new_imagelist;
Image *image;
if (!images)
{
rb_bug("rm_imagelist_from_images called with NULL argument");
}
new_imagelist = ImageList_new();
while (images)
{
image = RemoveFirstImageFromList(&images);
imagelist_push(new_imagelist, rm_image_new(image));
}
(void) rb_iv_set(new_imagelist, "@scene", INT2FIX(0));
RB_GC_GUARD(new_imagelist);
return new_imagelist;
}
/**
* Call QuantizeImages.
*
* Ruby usage:
* - @verbatim ImageList#quantize @endverbatim
* - @verbatim ImageList#quantize(number_colors) @endverbatim
* - @verbatim ImageList#quantize(number_colors, colorspace) @endverbatim
* - @verbatim ImageList#quantize(number_colors, colorspace, dither) @endverbatim
* - @verbatim ImageList#quantize(number_colors, colorspace, dither, tree_depth) @endverbatim
* - @verbatim ImageList#quantize(number_colors, colorspace, dither, tree_depth, measure_error) @endverbatim
*
* Notes:
* - Default number_colors is 256
* - Default coorspace is Magick::RGBColorsapce
* - Default dither is true
* - Default tree_depth is 0
* - Default measure_error is false
* - Sets \@scene to the same value as self.scene
*
* @param argc number of input arguments
* @param argv array of input arguments
* @param self this object
* @return a new ImageList with quantized images
*/
VALUE
ImageList_quantize(int argc, VALUE *argv, VALUE self)
{
Image *images, *new_images;
Image *new_image;
QuantizeInfo quantize_info;
ExceptionInfo *exception;
VALUE new_imagelist, scene;
GetQuantizeInfo(&quantize_info);
switch (argc)
{
case 5:
quantize_info.measure_error = (MagickBooleanType) RTEST(argv[4]);
case 4:
quantize_info.tree_depth = (unsigned long)NUM2INT(argv[3]);
case 3:
#if defined(HAVE_TYPE_DITHERMETHOD) && defined(HAVE_ENUM_NODITHERMETHOD)
if (rb_obj_is_kind_of(argv[2], Class_DitherMethod))
{
VALUE_TO_ENUM(argv[2], quantize_info.dither_method, DitherMethod);
quantize_info.dither = quantize_info.dither_method != NoDitherMethod;
}
#else
quantize_info.dither = (MagickBooleanType) RTEST(argv[2]);
#endif
case 2:
VALUE_TO_ENUM(argv[1], quantize_info.colorspace, ColorspaceType);
case 1:
quantize_info.number_colors = NUM2ULONG(argv[0]);
case 0:
break;
default:
rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 5)", argc);
break;
}
// Convert image array to image sequence, clone image sequence.
exception = AcquireExceptionInfo();
images = images_from_imagelist(self);
new_images = CloneImageList(images, exception);
rm_split(images);
rm_check_exception(exception, new_images, DestroyOnError);
rm_ensure_result(new_images);
(void) QuantizeImages(&quantize_info, new_images);
rm_check_exception(exception, new_images, DestroyOnError);
(void) DestroyExceptionInfo(exception);
// Create new ImageList object, convert mapped image sequence to images,
// append to images array.
new_imagelist = ImageList_new();
while ((new_image = RemoveFirstImageFromList(&new_images)))
{
imagelist_push(new_imagelist, rm_image_new(new_image));
}
// Set @scene in new ImageList object to same value as in self.
scene = rb_iv_get(self, "@scene");
(void) rb_iv_set(new_imagelist, "@scene", scene);
RB_GC_GUARD(new_imagelist);
RB_GC_GUARD(scene);
return new_imagelist;
}
/*
Method: ImageList#quantize(<number_colors<, colorspace<, dither<, tree_depth<, measure_error>>>>>)
defaults: 256, Magick::RGBColorspace, true, 0, false
Purpose: call QuantizeImages
Returns: a new ImageList with quantized images. 'scene' is set to the same
value as self.scene
*/
VALUE
ImageList_quantize(int argc, VALUE *argv, VALUE self)
{
Image *images, *new_images;
Image *new_image;
QuantizeInfo quantize_info;
ExceptionInfo exception;
volatile VALUE new_imagelist, scene;
GetQuantizeInfo(&quantize_info);
switch (argc)
{
case 5:
quantize_info.measure_error = (MagickBooleanType) RTEST(argv[4]);
case 4:
quantize_info.tree_depth = (unsigned long)NUM2INT(argv[3]);
case 3:
quantize_info.dither = (MagickBooleanType) RTEST(argv[2]);
case 2:
VALUE_TO_ENUM(argv[1], quantize_info.colorspace, ColorspaceType);
case 1:
quantize_info.number_colors = NUM2ULONG(argv[0]);
case 0:
break;
default:
rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 5)", argc);
break;
}
if (imagelist_length(self) == 0L)
{
rb_raise(rb_eArgError, "no images in this image list");
}
// Convert image array to image sequence, clone image sequence.
GetExceptionInfo(&exception);
images = images_from_imagelist(self);
new_images = CloneImageList(images, &exception);
rm_split(images);
rm_check_exception(&exception, new_images, DestroyOnError);
(void) DestroyExceptionInfo(&exception);
rm_ensure_result(new_images);
(void) QuantizeImages(&quantize_info, new_images);
rm_check_exception(&exception, new_images, DestroyOnError);
// Create new ImageList object, convert mapped image sequence to images,
// append to images array.
new_imagelist = ImageList_new();
while ((new_image = ShiftImageList(&new_images)))
{
imagelist_push(new_imagelist, rm_image_new(new_image));
}
// Set @scene in new ImageList object to same value as in self.
scene = rb_iv_get(self, "@scene");
(void) rb_iv_set(new_imagelist, "@scene", scene);
return new_imagelist;
}
