A print control device comprising: a generating unit configured to generate image data, based on gloss control plane data for specifying a type of a surface effect to be given to a recording medium and specifying a region to which the surface effect is to be given in the recording medium; and an output unit configured to output the image data, characterized in that: the generating unit includes a tone correcting unit (5613, 5623, 5633) configured to perform a tone correction on a region in which the surface effect is designated in the gloss control plane data, the tone correction varying with each type of surface effect; the print control device further comprising: a first storage unit configured to store target information for each type of surface effect, the target information indicating a relationship between a density value of the gloss control plane data and a gloss level to be achieved as a result of printing; a second storage unit configured to store a parameter of the tone correction for each type of surface effect; a patch image generating unit (51, 55) configured to generate image data of a patch image to be used in setting the parameter, for each type of surface effect; and a first changing unit configured to change the parameters to obtain the relationship indicated by the target information, using a result of measurement of a gloss level of the patch image formed on the recording medium and the target information, for each type of surface effect. a generating unit configured to generate image data, based on gloss control plane data for specifying a type of a surface effect to be given to a recording medium and specifying a region to which the surface effect is to be given in the recording medium; and an output unit configured to output the image data, characterized in that: the generating unit includes a tone correcting unit (5613, 5623, 5633) configured to perform a tone correction on a region in which the surface effect is designated in the gloss control plane data, the tone correction varying with each type of surface effect; the print control device further comprising: a first storage unit configured to store target information for each type of surface effect, the target information indicating a relationship between a density value of the gloss control plane data and a gloss level to be achieved as a result of printing; a second storage unit configured to store a parameter of the tone correction for each type of surface effect; a patch image generating unit (51, 55) configured to generate image data of a patch image to be used in setting the parameter, for each type of surface effect; and a first changing unit configured to change the parameters to obtain the relationship indicated by the target information, using a result of measurement of a gloss level of the patch image formed on the recording medium and the target information, for each type of surface effect. the generating unit includes a tone correcting unit (5613, 5623, 5633) configured to perform a tone correction on a region in which the surface effect is designated in the gloss control plane data, the tone correction varying with each type of surface effect; the print control device further comprising: a first storage unit configured to store target information for each type of surface effect, the target information indicating a relationship between a density value of the gloss control plane data and a gloss level to be achieved as a result of printing; a second storage unit configured to store a parameter of the tone correction for each type of surface effect; a patch image generating unit (51, 55) configured to generate image data of a patch image to be used in setting the parameter, for each type of surface effect; and a first changing unit configured to change the parameters to obtain the relationship indicated by the target information, using a result of measurement of a gloss level of the patch image formed on the recording medium and the target information, for each type of surface effect. a first storage unit configured to store target information for each type of surface effect, the target information indicating a relationship between a density value of the gloss control plane data and a gloss level to be achieved as a result of printing; a second storage unit configured to store a parameter of the tone correction for each type of surface effect; a patch image generating unit (51, 55) configured to generate image data of a patch image to be used in setting the parameter, for each type of surface effect; and a first changing unit configured to change the parameters to obtain the relationship indicated by the target information, using a result of measurement of a gloss level of the patch image formed on the recording medium and the target information, for each type of surface effect.