v/examples/viewer/zip_container.v

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/**********************************************************************
*
* Zip container manager
*
* Copyright (c) 2021 Dario Deledda. All rights reserved.
* Use of this source code is governed by an MIT license
* that can be found in the LICENSE file.
*
* TODO:
**********************************************************************/
import sokol.gfx
import szip
fn (mut il Item_list) scan_zip(path string, in_index int) ? {
println('Scanning ZIP [$path]')
mut zp := szip.open(path, szip.CompressionLevel.no_compression, szip.OpenMode.read_only) ?
n_entries := zp.total() ?
// println(n_entries)
for index in 0 .. n_entries {
zp.open_entry_by_index(index) ?
is_dir := zp.is_dir() ?
name := zp.name()
size := zp.size()
// println("$index ${name} ${size:10} $is_dir")
if !is_dir {
ext := get_extension(name)
if is_image(ext) == true {
il.n_item += 1
mut item := Item{
need_extract: true
path: path
name: name.clone()
container_index: in_index
container_item_index: index
i_type: ext
n_item: il.n_item
drawable: true
size: size
}
il.lst << item
}
}
// IMPORTANT NOTE: don't close the zip entry before we have used all the items!!
zp.close_entry()
}
zp.close()
}
fn (mut app App) load_texture_from_zip() ?(gfx.Image, int, int) {
item := app.item_list.lst[app.item_list.item_index]
// println("Load from zip [${item.path}]")
// open the zip
if app.zip_index != item.container_index {
if app.zip_index >= 0 {
app.zip.close()
}
app.zip_index = item.container_index
// println("Opening the zip [${item.path}]")
app.zip = szip.open(item.path, szip.CompressionLevel.no_compression, szip.OpenMode.read_only) ?
}
// println("Now get the image")
app.zip.open_entry_by_index(item.container_item_index) ?
zip_entry_size := int(item.size)
app.resize_buf_if_needed(zip_entry_size)
app.zip.read_entry_buf(app.mem_buf, app.mem_buf_size) ?
app.zip.close_entry()
return app.load_texture_from_buffer(app.mem_buf, zip_entry_size)
}