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Add example error messages #64

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merged 3 commits into from
Mar 16, 2024
Merged

Add example error messages #64

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c1c8d31
Add error message for watermark.lua usage
rolandlo Mar 16, 2024
88f9cf5
Add error message for buffer.lua usage
rolandlo Mar 16, 2024
68b16a0
Wrap io.open into assert in buffer.lua
rolandlo Mar 16, 2024
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6 changes: 5 additions & 1 deletion example/buffer.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,11 @@

local vips = require "vips"

local f = io.open(arg[1], "rb")
if #arg ~= 1 then
print("usage: luajit buffer.lua image-file")
error()
end
local f = assert(io.open(arg[1], "rb"))
local content = f:read("*all")

local im = vips.Image.new_from_buffer(content, "", {access = "sequential"})
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4 changes: 4 additions & 0 deletions example/watermark.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,10 @@ local vips = require "vips"
-- uncomment for very chatty output
-- vips.log.enable(true)

if #arg ~= 3 then
print("usage: luajit watermark.lua input-image-file output-image-file text")
error()
end
local im = vips.Image.new_from_file(arg[1], {access = "sequential"})

-- make the text mask
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