set/get_font_matrix (#331)

JuliaGraphics · Aug 2, 2020 · c6aea85 · c6aea85
1 parent 0e8323f
commit c6aea85
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diff --git a/src/Cairo.jl b/src/Cairo.jl
@@ -103,6 +103,7 @@ export
     set_font_face, set_font_size, select_font_face,
     textwidth, textheight, text_extents,
     TeXLexer, tex2pango, show_text, text_path,
+    set_font_matrix, get_font_matrix,
 
     # images
     write_to_png, image, read_from_png,
@@ -1118,6 +1119,16 @@ function set_matrix(p::CairoPattern, m::CairoMatrix)
     ccall((:cairo_pattern_set_matrix, libcairo), Nothing, (Ptr{Nothing}, Ptr{Nothing}), p.ptr, [m])
 end
 
+# -----------------------------------------------------------------------------
+function get_font_matrix(ctx::CairoContext)
+    m = [CairoMatrix()]
+    ccall((:cairo_get_font_matrix, libcairo), Nothing, (Ptr{Nothing}, Ptr{Nothing}), ctx.ptr, m)
+    m[1]
+end
+
+function set_font_matrix(ctx::CairoContext, m::CairoMatrix)
+    ccall((:cairo_set_font_matrix, libcairo), Nothing, (Ptr{Nothing}, Ptr{Nothing}), ctx.ptr, [m])
+end
 
 # -----------------------------------------------------------------------------
 function set_line_type(ctx::CairoContext, nick::AbstractString)

diff --git a/test/runtests.jl b/test/runtests.jl
@@ -333,4 +333,20 @@ end
     @test destroy(cr) == nothing
 end
 
+@testset "font_matrix" begin
+    z = zeros(UInt32,512,512);
+    surf = CairoImageSurface(z, Cairo.FORMAT_ARGB32)
+
+    pa = surf.ptr
+    surf.ptr = C_NULL
+
+    surf.ptr = pa
+    cr = Cairo.CairoContext(surf)
+
+    m = CairoMatrix(1.0,2.0,2.0,1.0,0.,0.)
+    set_font_matrix(cr, m)
+    @test m == get_font_matrix(cr)
+    @test destroy(cr) == nothing
+end
+
 nothing