Cairo driver dies unexpectedly after d.font

[hamish]

Hi,

working in 6.5svn, the Cairo driver dies unexpectedly a command after I call d.font.

G65> d.mon start=cairo
cairo: collecting to file: map.png,
GRASS_WIDTH=1026, GRASS_HEIGHT=903
Graphics driver [cairo] started

G65> d.font Vera

G65> d.barscale at=7.992203,5.862832 bcol=none
ERROR: Cairo_draw_bitmap: Failed to create source

sometimes it also gives this error message:

ERROR eof from graphics driver.

and the driver is then closed. without d.font it all works fine.

libcairo2 1.6.4, in debian/stable amd64 haven't tested on other branches yet.

?, Hamish

[glynn]

Replying to hamish:

working in 6.5svn, the Cairo driver dies unexpectedly a command after I call d.font.

ERROR: Cairo_draw_bitmap: Failed to create source

lib/cairodriver/Draw_bitmap.c needs sync'ing with 7.0. It can't be merged due to other changes to the driver architecture, but it shouldn't be too hard to take the 7.0 version then tweak it for 6.x.

Cairo typically requires surfaces to be word-aligned. Older versions would create unaligned surfaces which produced garbage when used as a source. Newer versions simply refuse to create them.

[glynn]

Replying to hamish:

working in 6.5svn, the Cairo driver dies unexpectedly a command after I call d.font.

ERROR: Cairo_draw_bitmap: Failed to create source

Duplicate of #1152. This one came first, but most of the useful discussion is on #1152.