Update readme

README.md

@@ -20,15 +20,15 @@ There is basic support for most HLSL built-in math functions for the following t
 - Vector types: float2, float3, float4, int2, int3, int4
 - Matrices: float4x4
 All of the above can be constructed with their namesake constructors i.e. `float4(x, y, z, w);`.
-We don't yet support textures and samplers.
+We also support Samplers and Texture2D
 
 If you want to declare and use variables you can do it as follows
 ```hlsl
 x : float  = 2.0; // no 'f' suffix required or even supported (it gives an error)
 y : float  = 4.0;
 v : float2 = float2(x, y);
+v2 := float2(x, y);
 ```
-For now it is required to specify the type of the variable (no type inference).
 
 You can also do arithmetic as you would expect
 ```
@@ -43,6 +43,7 @@ Camera_Data :: struct {
 }
 ```
 And there is a special struct called `properties`, which is used for custom data you want to pass in.
+#### ** Note: Properties will likely be deprecated, since the language now supports `@` hints to easily mark buffers and values with metadata.**
 ```hlsl
 properties {
 	projection : float4x4;
@@ -53,13 +54,14 @@ which will be exposed in the compiled result. `properties` can be renamed to a c
 ```
 p :: properties {
 	...
-}
+
+
 ```
 
 You can also define constant buffers
 
 ```
-camera :: Constant_Buffer {
+camera :: constant_buffer {
 	projection : float4x4;
 	view       : float4x4;
 }
@@ -70,69 +72,68 @@ camera :: Constant_Buffer {
 To compile a shader and use the result, you can do the following in jai
 ```jai
 
-parse_shader :: (path : string, allocator : Allocator) -> Compilation_Result {
-	// In the future, you can pass environment defines to the compiler.
-	compiler : Shader_Compiler;
-	
-	return compile_file(*compiler, path,, allocator);	
-}
+// In the future, you can pass environment defines to the compiler.
+ctx : Compiler_Context;
+compile_file(*compiler, "shader.shd", allocator);
 
-result := parse_shader("shader.shd", allocator);
-if result.had_error {
-	log_error("%\n", report_messages(result.messages),, temp);
+if ctx.had_error {
+	log_error("%\n", report_messages(ctx.messages),, temp);
 	return;
 }
 
-collection := result.collection;
-variant := collection.variants[0];
-}
+// The ctx now contains all the needed information like the source text, entry points, constant buffers etc.
 ```
 
 When parsing a shader you get the following struct as a result
 ```
-Compilation_Result :: struct {
-	messages : [..]Compiler_Message;
+Compiler_Context :: struct {
+	file : Input_File;
 
-	had_error : bool;
+	environment : Environment;
+	
+	tokens : [..]Token;;
+	root  : *AST_Node;
+	nodes : [..]AST_Node;
 
-	collection : Shader_Variant_Collection;
-}
-```
+	codegen_result_text : string;
 
-A `Shader_Variant_Collection` looks as follows
-```
-Shader_Variant_Collection :: struct {
-	properties : Properties;
+	constant_buffers : Static_Array(Type_Variable_Handle, 16);
 
-	max_constant_buffers :: 16;
-	cbuffers : Static_Array(Constant_Buffer, max_constant_buffers);
+	scope_stack : Scope_Stack;
+	type_variables : [..]Type_Variable;
 
-	variants : [..]Shader_Variant;
-}
-
-Shader_Variant :: struct {
-	text : string;
+	property_name : string;
 
 	vertex_entry_point : struct {
+		node : *AST_Node;
 		name : string;
-
 		input : [..]Field;
 	}
 
 	pixel_entry_point : struct {
+		node : *AST_Node;
 		name : string;
-
 		return_value : Field;
 	}
+
+	properties : Properties;
+
+	max_constant_buffers :: 16;
+
+	cbuffers : Static_Array(Constant_Buffer, max_constant_buffers);
+
+	had_error : bool;
+	messages : [..]Compiler_Message;
 }
 
 Constant_Buffer :: struct {
-	register : int;
-
 	name : string;
 
 	fields : Static_Array(Property_Field, 16);
 
+	// hints : Field_Hint; // optional hint...
+	hints : [..]Field_Hint;
+
 	buffer_index : u32;
 }
 
@@ -192,11 +193,10 @@ Hint_Kind :: enum {
 
 ## Notable missing features
 
-- Control flow: if/else, for, while, switch etc.
+- While
 - Arrays
-- Textures and samplers
 - Multiple render targets
 - Custom buffers/structured buffers
 - Interpolation specifiers
 - Proper variant handling with environment defines
-- Include/importing files such as shared utils etc.
+- Importing files such as shared utils etc. with something other than textual `#load`