mirror of
https://github.com/awesomeWM/awesome
synced 2024-11-17 07:47:41 +01:00
41bc77d64c
Before commit 1b2826 in lgi, the get_rgba() function on cairo SolidPatterns was
specified like this:
get_rgba = { ret = cairo.Status,
{ ti.double, dir = 'out' },
{ ti.double, dir = 'out' },
{ ti.double, dir = 'out' } },
The above commit fixed this (without saying so) and the code became:
get_rgba = { ret = cairo.Status,
{ ti.double, dir = 'out' },
{ ti.double, dir = 'out' },
{ ti.double, dir = 'out' },
{ ti.double, dir = 'out' } },
The prototype for the corresponding cairo function is:
cairo_public cairo_status_t
cairo_pattern_get_rgba (cairo_pattern_t *pattern,
double *red, double *green,
double *blue, double *alpha);
As you see, this functions gets four double* as arguments and it will save its
result via those pointers. Old versions of lgi call this function with too few
arguments and this will cause a segmentation fault when cairo dereferences an
invalid pointer.
Signed-off-by: Uli Schlachter <psychon@znc.in>
46 lines
1.4 KiB
Lua
46 lines
1.4 KiB
Lua
---------------------------------------------------------------------------
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-- @author Uli Schlachter
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-- @copyright 2012 Uli Schlachter
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-- @release @AWESOME_VERSION@
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---------------------------------------------------------------------------
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local setmetatable = setmetatable
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local type = type
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local capi = { awesome = awesome }
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local cairo = require("lgi").cairo
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-- Keep this in sync with build-utils/lgi-check.sh!
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local ver_major, ver_minor = string.match(require('lgi.version'), '(%d)%.(%d)')
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if tonumber(ver_major) <= 0 and tonumber(ver_minor) < 7 then
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error("lgi too old, need at least version 0.7.0")
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end
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-- gears.surface
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local surface = { mt = {} }
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--- Try to convert the argument into an lgi cairo surface.
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-- This is usually needed for loading images by file name.
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function surface.load(_surface)
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-- Nil is not changed
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if not _surface then
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return nil
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end
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-- lgi cairo surfaces don't get changed either
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if cairo.Surface:is_type_of(_surface) then
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return _surface
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end
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-- Strings are assumed to be file names and get loaded
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if type(_surface) == "string" then
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_surface = capi.awesome.load_image(_surface)
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end
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-- Everything else gets forced into a surface
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return cairo.Surface(_surface, true)
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end
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function surface.mt:__call(...)
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return surface.load(...)
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end
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return setmetatable(surface, surface.mt)
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-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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