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\alias{cairoShowTextGlyphs}
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\name{cairoShowTextGlyphs}
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\title{cairoShowTextGlyphs}
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\description{This operation has rendering effects similar to \code{\link{cairoShowGlyphs}}
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but, if the target surface supports it, uses the provided text and
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cluster mapping to embed the text for the glyphs shown in the output.
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If the target does not support the extended attributes, this function
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acts like the basic \code{\link{cairoShowGlyphs}} as if it had been passed
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\code{glyphs} and \code{num.glyphs}.}
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\usage{cairoShowTextGlyphs(cr, utf8, glyphs, clusters, cluster.flags)}
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\item{\verb{cr}}{[\code{\link{Cairo}}] a cairo context}
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\item{\verb{utf8}}{[char] a string of text encoded in UTF-8}
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\item{\verb{glyphs}}{[\code{\link{CairoGlyph}}] list of glyphs to show}
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\item{\verb{clusters}}{[\code{\link{CairoTextCluster}}] list of cluster mapping information}
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\item{\verb{cluster.flags}}{[\code{\link{CairoTextClusterFlags}}] cluster mapping flags}
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\details{The mapping between \code{utf8} and \code{glyphs} is provided by a list of
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\dfn{clusters}. Each cluster covers a number of
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text bytes and glyphs, and neighboring clusters cover neighboring
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areas of \code{utf8} and \code{glyphs}. The clusters should collectively cover \code{utf8}
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and \code{glyphs} in entirety.
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The first cluster always covers bytes from the beginning of \code{utf8}.
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If \code{cluster.flags} do not have the \code{CAIRO_TEXT_CLUSTER_FLAG_BACKWARD}
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set, the first cluster also covers the beginning
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of \code{glyphs}, otherwise it covers the end of the \code{glyphs} list and
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following clusters move backward.
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See \code{\link{CairoTextCluster}} for constraints on valid clusters.
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\author{Derived by RGtkGen from GTK+ documentation}
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man/cairoShowTextGlyphs.Rd
