public ISurfaceShader As(string programName)
{
var program = new ReloadableShaderProgram(shaders);
manager.Add(program, programName);
return(program);
}
private void registerProgramForItsShaders(ReloadableShaderProgram shaderProgram)
{
foreach (var shader in shaderProgram.Shaders)
{
programsByShader.TryGetValue(shader, out var programs);
if (programs == null)
{
programs = new List <ReloadableShaderProgram>();
programsByShader.Add(shader, programs);
}
programs.Add(shaderProgram);
}
}
public void Add(ReloadableShaderProgram shaderProgram, string name)
{
if (programs.ContainsKey(name))
{
throw new ArgumentException($"Tried adding shader program with name '{name} which is already taken.");
}
// make sure all shaders can be added so in case of error our internal state stays valid
var shadersToAdd = getUnknownShadersOfProgramAndFailOnNameCollision(shaderProgram, name);
// add shaders we don't know yet
foreach (var shader in shadersToAdd)
{
Add(shader, name);
}
programs.Add(name, shaderProgram);
registerProgramForItsShaders(shaderProgram);
}
private List <ReloadableShader> getUnknownShadersOfProgramAndFailOnNameCollision(
ReloadableShaderProgram shaderProgram, string name)
{
return(shaderProgram.Shaders.Where(
shader =>
{
if (shaderNames.ContainsKey(shader))
{
return false;
}
var shadersOfType = shaders[shader.Type];
if (shadersOfType.ContainsKey(name))
{
throw new ArgumentException(
$"Tried adding unknown {shader.Type} under name '{name}', but name is already taken.");
}
return true;
}
).ToList());
}
public ISurfaceShader As(string programName)
{
var program = new ReloadableShaderProgram(this.shaders);
this.manager.Add(program, programName);
return program;
}
public void Add(ReloadableShaderProgram shaderProgram, string name)
{
var knownShaders = new bool[shaderProgram.Shaders.Count];
// make sure all shaders can be added so in case of error our internal state stays valid
for (int i = 0; i < shaderProgram.Shaders.Count; i++)
{
var shader = shaderProgram.Shaders[i];
if (this.shaderNames.ContainsKey(shader))
{
knownShaders[i] = true;
}
else
{
var dict = this.shaders[shader.Type];
if (dict.ContainsKey(name))
{
throw new ArgumentException(
string.Format("Tried adding unknown {0} under name '{1}', but name already taken.",
shader.Type, name));
}
}
}
// add shaders we don't know yet
for (int i = 0; i < shaderProgram.Shaders.Count; i++)
{
if (!knownShaders[i])
{
var shader = shaderProgram.Shaders[i];
this.Add(shader, name);
}
}
this.programs.Add(name, shaderProgram);
// register program for all shaders
foreach (var shader in shaderProgram.Shaders)
{
List<ReloadableShaderProgram> programs;
this.programsByShader.TryGetValue(shader, out programs);
if (programs == null)
{
programs = new List<ReloadableShaderProgram>();
this.programsByShader.Add(shader, programs);
}
programs.Add(shaderProgram);
}
}
private bool tryReloadProgramIfContainsReloadedShaders(ReloadableShaderProgram program)
{
try
{
program.ReloadIfContainsAny(this.reloadedShaders);
return true;
}
catch (Exception e)
{
// linking program with new shader failed
}
return false;
}
private bool tryReloadProgram(ReloadableShaderProgram program)
{
try
{
program.Reload();
return true;
}
catch (Exception e)
{
// linking program with new shader failed
}
return false;
}