1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
require"imlua"
require"cdlua"
require"cdluaim"
require"iuplua"
require"iupluacd"
function PrintError(func, error)
local msg = {}
msg[im.ERR_OPEN] = "Error Opening File."
msg[im.ERR_MEM] = "Insuficient memory."
msg[im.ERR_ACCESS] = "Error Accessing File."
msg[im.ERR_DATA] = "Image type not Suported."
msg[im.ERR_FORMAT] = "Invalid Format."
msg[im.ERR_COMPRESS] = "Invalid or unsupported compression."
if msg[error] then
print(func..": "..msg[error])
else
print("Unknown Error.")
end
end
function LoadImage(file_name)
local image
local ifile, error = im.FileOpen(file_name)
if not ifile then
PrintError("open", error)
return
end
-- load the first image in the file.
-- force the image to be converted to a bitmap
image, error = ifile:LoadBitmap()
if not image then
PrintError("load", error)
return
end
ifile:Close()
return image
end
dlg = nil -- only one dlg
function ShowImage(file_name)
local image = LoadImage(file_name)
if not image then
return false
end
if dlg then
local old_canvas = dlg.canvas
local old_image = dlg.image
if old_canvas ~= nil then old_canvas:Kill() end
if old_image ~= nil then old_image:Destroy() end
iup.Destroy(dlg)
end
cnv = iup.canvas{}
function cnv:action()
local canvas = dlg.canvas
local image = dlg.image
if (not canvas) then return end
canvas:Activate()
canvas:Clear()
image:cdCanvasPutImageRect(canvas, 0, 0, image:Width(), image:Height(), 0, 0, 0, 0)
canvas:Flush()
return iup.DEFAULT
end
function cnv:button_cb()
local file_name = "*.*"
local error
file_name, error = iup.GetFile(file_name)
if error ~= 0 then
return iup.DEFAULT
end
ShowImage(file_name)
return iup.DEFAULT
end
-- Set the Canvas inicial size (IUP will retain this value).
cnv.rastersize = string.format("%dx%d", image:Width(), image:Height())
dlg = iup.dialog{cnv}
dlg.title = file_name
function dlg:close_cb()
local canvas = self.canvas
local image = self.image
if canvas then canvas:Kill() end
if image then image:Destroy() end
return iup.CLOSE
end
dlg:show()
canvas = cd.CreateCanvas(cd.IUP, cnv)
assert(canvas)
dlg.canvas = canvas
dlg.image = image
cnv:action()
return true
end
function main(arg)
local file_name = "*.*"
local error
-- Try to get a file name from the command line.
if (arg == nil or table.getn(arg) < 2) then
file_name, error = iup.GetFile(file_name)
if error ~= 0 then
return true
end
else
file_name = arg[1]
end
if not ShowImage(file_name) then
local Try = true
-- If ShowImage returns an error I will try to read another image.
-- I can give up on File Open dlg choosing "Cancel".
while Try do
file_name = "*.*"
file_name, error = iup.GetFile(file_name)
if error ~= 0 then
return true
end
if ShowImage(file_name) then
Try = false
end
end
end
iup.MainLoop()
return true
end
main(arg)
|
