Expression GetProgram(Draw draw)
{
_obfuscator.Minify(draw.State);
var src = draw.Source;
var vsSource = GlslWriter.BuildString(_backend, draw.State.VertexShader, !Environment.Debug);
var fsSource = GlslWriter.BuildString(_backend, draw.State.PixelShader, !Environment.Debug);
var key = vsSource + ":" + fsSource;
foreach (var e in _programs.GetList(key))
{
if (e.Source.Package.IsAccessibleFrom(draw.Source.Package))
{
return(e);
}
}
int constCount = draw.State.RuntimeConstants.Count;
int attribCount = draw.State.VertexAttributes.Count;
int uniformCount = draw.State.Uniforms.Count;
int samplerCount = draw.State.PixelSamplers.Count;
var array = new Expression[constCount + attribCount + uniformCount + samplerCount];
var index = 0;
foreach (var v in draw.State.RuntimeConstants)
{
array[index++] = new Constant(src, Essentials.String, v.Name);
}
foreach (var v in draw.State.VertexAttributes)
{
array[index++] = new Constant(src, Essentials.String, v.Name);
}
foreach (var v in draw.State.Uniforms)
{
array[index++] = new Constant(src, Essentials.String, v.Name);
}
foreach (var v in draw.State.PixelSamplers)
{
array[index++] = new Constant(src, Essentials.String, v.Name);
}
var prog = ILFactory.CallMethod(src,
"Uno.Graphics.OpenGL.GLProgram", "Create",
new Constant(src, Essentials.String, vsSource),
new Constant(src, Essentials.String, fsSource),
new Constant(src, Essentials.Int, constCount),
new Constant(src, Essentials.Int, attribCount),
new NewArray(src, _stringArray, array));
var result = _bundle.AddProgram(draw.State.Path.DrawBlock, prog);
_programs.Add(key, result);
if (_dumpShaders)
{
var prefix = Environment.Combine("shaders",
Type.QualifiedName + "." + key.GetHashCode().ToString("x8"));
Disk.WriteAllText(prefix + ".vert", vsSource);
Disk.WriteAllText(prefix + ".frag", fsSource);
}
return(result);
}