[GRASS-dev] ERROR: Cairo_draw_bitmap: Failed to create source

[Glynn Clements]

Markus Neteler wrote:

> I am trying to render PDFs from screen output (6.5, for 7 see below) and ran
> into this error:
> 
> # minimalistic example
> d.erase
> echo "Ciao" | d.text at=15,92 -b size=4 font=Vera
> 
> d.out.file output format=pdf
> Using the Cairo driver.
> Saving display from Monitor: [x0] to <output.pdf>.
> Image size [1276 x 966]
> ERROR: Cairo_draw_bitmap: Failed to create source

Can you run "nm -D" on libgrass_cairodriver.so and report whether the
symbol cairo_format_stride_for_width appears in the output?

That function requires cairo 1.5.8 or later. On earlier versions, the
stride is forced to be a multiple of 4; it may be that it needs to be
a multiple of 8 on a 64-bit platform.

> GRASS 7 - no success at all:
> 
> export GRASS_RENDER_IMMEDIATE=CAIRO
> export GRASS_PNGFILE=map.pdf
> d.rast map=elevation.10m
>  100%
> ERROR: write_image: unknown file type: .pdf

That error message is from the PNG driver, which implies that GRASS
was built without cairo support.

-- 
Glynn Clements <glynn at gclements.plus.com>