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fix string conversions in cairo backend #49

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fix string conversions in cairo backend #49

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12 changes: 6 additions & 6 deletions src/cairo.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -45,15 +45,15 @@ end

const julia_cairo_engine = Ref{gvdevice_engine_t}()
const julia_cairo_features = Ref{gvdevice_features_t}(gvdevice_features_t(Int32(0),0.,0.,0.,0.,96.,96.))
const julia_cairo_name = Vector{UInt8}("julia:cairo")
const julia_cairo_libname = Vector{UInt8}("julia:cairo")
const julia_cairo_name = Base.unsafe_convert(Cstring, "julia:cairo")
const julia_cairo_libname = Base.unsafe_convert(Cstring, "julia:cairo")
const julia_cairo_device = Ref{NTuple{2, gvplugin_installed_t}}()
const julia_cairo_api = Ref{NTuple{2, gvplugin_api_t}}()

function init_cairo_structs!()
julia_cairo_engine[] = gvdevice_engine_t(@cfunction(cairo_initialize,Cvoid,(Ptr{Cvoid},)),@cfunction(cairo_format,Cvoid,(Ptr{Cvoid},)),@cfunction(cairo_finalize,Cvoid,(Ptr{Cvoid},)))
julia_cairo_device[] = (
gvplugin_installed_t(Int32(0),pointer(julia_cairo_name), Int32(0), unsafe_convert(Ptr{gvdevice_engine_t}, julia_cairo_engine), unsafe_convert(Ptr{gvdevice_features_t}, julia_cairo_features)),
gvplugin_installed_t(Int32(0), julia_cairo_name, Int32(0), unsafe_convert(Ptr{gvdevice_engine_t}, julia_cairo_engine), unsafe_convert(Ptr{gvdevice_features_t}, julia_cairo_features)),
null(gvplugin_installed_t)
)
julia_cairo_api[] = (gvplugin_api_t(API_device, unsafe_convert(Ptr{gvplugin_installed_t}, julia_cairo_device)),
Expand All @@ -62,7 +62,7 @@ end

function add_julia_cairo!(c::Context)
lib = Ref{gvplugin_library_t}(gvplugin_library_t(
pointer(julia_cairo_libname),unsafe_convert(Ptr{gvplugin_api_t}, julia_cairo_api)))
julia_cairo_libname, unsafe_convert(Ptr{gvplugin_api_t}, julia_cairo_api)))
ccall((:gvAddLibrary,libgvc),Cvoid,(Ptr{Cvoid},Ptr{gvplugin_library_t}),c.handle,lib)
end

Expand All @@ -76,7 +76,7 @@ function render(c::CairoContext,g::GraphViz.Graph; context = default_context[],
if !g.didlayout
error("Must call layout before calling render!")
end
ccall((:gvRenderContext,libgvc),Cint,(Ptr{Cvoid},Ptr{Cvoid},Ptr{UInt8},Any),context.handle,g.handle,format,c)
ccall((:gvRenderContext,libgvc),Cint,(Ptr{Cvoid},Ptr{Cvoid},Cstring,Any),context.handle,g.handle,format,c)
end

function cairo_render(g::GraphViz.Graph; context = default_context[], format="julia:cairo")
Expand All @@ -85,7 +85,7 @@ function cairo_render(g::GraphViz.Graph; context = default_context[], format="ju
if !g.didlayout
error("Must call layout before calling render!")
end
ccall((:gvRenderContext,libgvc),Cint,(Ptr{Cvoid},Ptr{Cvoid},Ptr{UInt8},Ptr{Cvoid}),context.handle,g.handle,format,C_NULL)
ccall((:gvRenderContext,libgvc),Cint,(Ptr{Cvoid},Ptr{Cvoid},Cstring,Ptr{Cvoid}),context.handle,g.handle,format,C_NULL)
surface = last_surface
last_surface = nothing
return surface
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