Convert .tgs with go libraries (and cgo) (telegram) (#1569)

This commit adds support for go/cgo tgs conversion when building with the -tags `cgo`
The default binaries are still "pure" go and uses the old way of converting.

* Move lottie_convert.py conversion code to its own file

* Add optional libtgsconverter

* Update vendor

* Apply suggestions from code review

* Update bridge/helper/libtgsconverter.go

Co-authored-by: Wim <wim@42.be>

1 files changed, 73 insertions, 0 deletions

diff --git a/vendor/github.com/sizeofint/webpanimation/generate_from_libwebp.py b/vendor/github.com/sizeofint/webpanimation/generate_from_libwebp.py
new file mode 100644
index 00000000..4ed29e8d
--- /dev/null
+++ b/vendor/github.com/sizeofint/webpanimation/generate_from_libwebp.py
@@ -0,0 +1,73 @@
+#!/usr/bin/python3
+# ./generate_from_libwebp.py /path/to/clean/libwebp/src/
+import glob
+import os
+import re
+import sys
+
+FILE_KEYS = {}
+
+def fix_headers(libwebp_dir, code_text):
+    out = ''
+    for line in code_text:
+        # Special config.h
+        if 'src/webp/config.h' in line:
+            out += '#include "config.h"\n'
+            continue
+        line = line.replace('#include "src/', '#include "' + libwebp_dir + '/')
+        header_file = re.match('#include\s+["]([^"]+)["].*', line)
+        # regex to search for <, > too
+        #header_file = re.match('#include\s+[<"]([^>"]+)[>"].*', line)
+        if header_file:
+            header = header_file.groups()[0]
+            abs_header = os.path.abspath(header)
+            header_exists = os.path.exists(abs_header)
+            if header_exists and abs_header in FILE_KEYS:
+                out += '#include "' + FILE_KEYS[abs_header] + '"\n'
+            else:
+                out += line + '\n'
+        else:
+            out += line + '\n'
+    return out
+
+if len(sys.argv) != 2:
+    print('usage: ./generate_from_libwebp.py /path/to/clean/libwebp/src/')
+    os._exit(1)
+
+code = ['.c', '.s', '.S', '.sx', 'cc', 'cpp', 'cpp' ]
+header = ['.h', '.hh', '.hpp', '.hxx' ]
+
+# Remove old files
+files = os.listdir('.')
+for file in files:
+    if file.endswith(tuple(code)) or file.endswith(tuple(header)):
+        os.remove(os.path.join('.', file))
+
+path = sys.argv[1]
+
+for file in glob.iglob(path + '/**', recursive=True):
+    if file.endswith(tuple(code)) or file.endswith(tuple(header)):
+        key = os.path.abspath(file)
+        val = file.replace(path, '').replace('/', '_')
+        FILE_KEYS[key] = val
+
+root_dir = os.path.abspath('.')
+libwebp_dir = os.path.abspath(path)
+for full_path, local in FILE_KEYS.items():
+    os.chdir(os.path.dirname(full_path))
+    with open(full_path) as code:
+        code_text = code.read().splitlines() 
+    code.close()
+    fixed = fix_headers(libwebp_dir, code_text)
+    os.chdir(root_dir)
+    local_file = open(local, "w")
+    local_file.write(fixed)
+    local_file.close()
+
+# Write config.h
+config = '#ifndef WEBANIMATION_HPP\n#define WEBANIMATION_HPP\n'
+config += '#define WEBP_USE_THREAD\n'
+config += '#endif\n'
+config_file = open('config.h', "w")
+config_file.write(config)
+config_file.close()