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Remove use of CRCs to bypass bullshit.

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This commit is contained in:
Pieter-Jan Briers
2018-12-03 16:55:00 +01:00
parent 5b7ff8ddee
commit b8becf4a56
1 changed files with 14 additions and 20 deletions
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40
Content.Client/Parallax/ParallaxManager.cs
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@@ -25,7 +25,7 @@ namespace Content.Client.Parallax
// Both of these below are in the user directory. // Both of these below are in the user directory.
private static readonly ResourcePath ParallaxPath = new ResourcePath("/parallax_cache.png"); private static readonly ResourcePath ParallaxPath = new ResourcePath("/parallax_cache.png");
private static readonly ResourcePath ParallaxConfigCrcPath = new ResourcePath("/parallax_config_crc"); private static readonly ResourcePath ParallaxConfigOld = new ResourcePath("/parallax_config_old");
public event Action<Texture> OnTextureLoaded; public event Action<Texture> OnTextureLoaded;
public Texture ParallaxTexture { get; private set; } public Texture ParallaxTexture { get; private set; }
@@ -34,6 +34,7 @@ namespace Content.Client.Parallax
{ {
MemoryStream configStream = null; MemoryStream configStream = null;
long crcValue; long crcValue;
string contents;
TomlTable table; TomlTable table;
try try
{ {
@@ -44,22 +45,20 @@ namespace Content.Client.Parallax
return; return;
} }
// Calculate CRC32 of the config file. using (var reader = new StreamReader(configStream, Encoding.UTF8))
var crc = new Crc32();
crc.Update(configStream.ToArray());
crcValue = crc.Value;
// See if we we have a previous CRC stored.
if (_resourceCache.UserData.Exists(ParallaxConfigCrcPath))
{ {
bool match; contents = reader.ReadToEnd();
using (var data = _resourceCache.UserData.Open(ParallaxConfigCrcPath, FileMode.Open)) }
using (var binaryReader = new BinaryReader(data))
{ if (_resourceCache.UserData.Exists(ParallaxConfigOld))
match = binaryReader.ReadInt64() == crcValue; {
bool match;
using (var data = _resourceCache.UserData.Open(ParallaxConfigOld, FileMode.Open))
using (var reader = new StreamReader(data, Encoding.UTF8))
{
match = reader.ReadToEnd() == contents;
} }
// If the previous CRC matches, just load the old texture.
if (match) if (match)
{ {
using (var stream = _resourceCache.UserData.Open(ParallaxPath, FileMode.Open)) using (var stream = _resourceCache.UserData.Open(ParallaxPath, FileMode.Open))
@@ -72,12 +71,7 @@ namespace Content.Client.Parallax
} }
} }
// Well turns out the CRC does not match so the config changed. table = Toml.ReadString(contents);
// Read the new config and get rid of the config memory stream.
using (var reader = new StreamReader(configStream, Encoding.UTF8))
{
table = Toml.ReadString(reader.ReadToEnd());
}
} }
finally finally
{ {
@@ -95,10 +89,10 @@ namespace Content.Client.Parallax
image.SaveAsPng(stream); image.SaveAsPng(stream);
} }
using (var stream = _resourceCache.UserData.Open(ParallaxConfigCrcPath, FileMode.Create)) using (var stream = _resourceCache.UserData.Open(ParallaxConfigOld, FileMode.Create))
using (var writer = new BinaryWriter(stream)) using (var writer = new StreamWriter(stream, Encoding.UTF8))
{ {
writer.Write(crcValue); writer.Write(contents);
} }
OnTextureLoaded?.Invoke(ParallaxTexture); OnTextureLoaded?.Invoke(ParallaxTexture);