From b975569a4009ebb089cd9edc262164177d358a54 Mon Sep 17 00:00:00 2001
From: Stephan Unverwerth <s.unverwerth@serenityos.org>
Date: Sun, 28 Aug 2022 10:36:31 +0200
Subject: [PATCH] LibGL: Add Shader and Program class stubs

---
 Userland/Libraries/LibGL/CMakeLists.txt      |  2 ++
 Userland/Libraries/LibGL/Shaders/Program.cpp | 28 +++++++++++++++
 Userland/Libraries/LibGL/Shaders/Program.h   | 28 +++++++++++++++
 Userland/Libraries/LibGL/Shaders/Shader.cpp  | 30 ++++++++++++++++
 Userland/Libraries/LibGL/Shaders/Shader.h    | 38 ++++++++++++++++++++
 5 files changed, 126 insertions(+)
 create mode 100644 Userland/Libraries/LibGL/Shaders/Program.cpp
 create mode 100644 Userland/Libraries/LibGL/Shaders/Program.h
 create mode 100644 Userland/Libraries/LibGL/Shaders/Shader.cpp
 create mode 100644 Userland/Libraries/LibGL/Shaders/Shader.h

diff --git a/Userland/Libraries/LibGL/CMakeLists.txt b/Userland/Libraries/LibGL/CMakeLists.txt
index 1b53acb7cb..7b29573dee 100644
--- a/Userland/Libraries/LibGL/CMakeLists.txt
+++ b/Userland/Libraries/LibGL/CMakeLists.txt
@@ -11,6 +11,8 @@ set(SOURCES
     Matrix.cpp
     NameAllocator.cpp
     Shader.cpp
+    Shaders/Program.cpp
+    Shaders/Shader.cpp
     Stencil.cpp
     Tex/Texture2D.cpp
     Texture.cpp
diff --git a/Userland/Libraries/LibGL/Shaders/Program.cpp b/Userland/Libraries/LibGL/Shaders/Program.cpp
new file mode 100644
index 0000000000..e432b24680
--- /dev/null
+++ b/Userland/Libraries/LibGL/Shaders/Program.cpp
@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2022, Stephan Unverwerth <s.unverwerth@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibGL/Shaders/Program.h>
+
+namespace GL {
+
+NonnullRefPtr<Program> Program::create()
+{
+    return adopt_ref(*new Program());
+}
+
+ErrorOr<void> Program::attach_shader(Shader&)
+{
+    TODO();
+    return {};
+}
+
+ErrorOr<void> Program::link()
+{
+    TODO();
+    return {};
+}
+
+}
diff --git a/Userland/Libraries/LibGL/Shaders/Program.h b/Userland/Libraries/LibGL/Shaders/Program.h
new file mode 100644
index 0000000000..3e619c3b2f
--- /dev/null
+++ b/Userland/Libraries/LibGL/Shaders/Program.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2022, Stephan Unverwerth <s.unverwerth@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/NonnullRefPtr.h>
+#include <AK/RefCounted.h>
+#include <AK/Vector.h>
+#include <LibGL/Shaders/Shader.h>
+
+namespace GL {
+
+class Program final : public RefCounted<Program> {
+public:
+    static NonnullRefPtr<Program> create();
+
+    ErrorOr<void> attach_shader(Shader&);
+    ErrorOr<void> link();
+
+private:
+    Vector<NonnullRefPtr<Shader>> m_vertex_shaders;
+    Vector<NonnullRefPtr<Shader>> m_fragment_shaders;
+};
+
+}
diff --git a/Userland/Libraries/LibGL/Shaders/Shader.cpp b/Userland/Libraries/LibGL/Shaders/Shader.cpp
new file mode 100644
index 0000000000..007a4fc76a
--- /dev/null
+++ b/Userland/Libraries/LibGL/Shaders/Shader.cpp
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2022, Stephan Unverwerth <s.unverwerth@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <AK/String.h>
+#include <LibGL/Shaders/Shader.h>
+
+namespace GL {
+
+NonnullRefPtr<Shader> Shader::create(GLenum shader_type)
+{
+    return adopt_ref(*new Shader(shader_type));
+}
+
+ErrorOr<void> Shader::add_source(StringView source_code)
+{
+    auto source_code_content = TRY(String::from_utf8(source_code));
+    TRY(m_sources.try_append(move(source_code_content)));
+    return {};
+}
+
+ErrorOr<void> Shader::compile()
+{
+    TODO();
+    return {};
+}
+
+}
diff --git a/Userland/Libraries/LibGL/Shaders/Shader.h b/Userland/Libraries/LibGL/Shaders/Shader.h
new file mode 100644
index 0000000000..c4a1a7d70f
--- /dev/null
+++ b/Userland/Libraries/LibGL/Shaders/Shader.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2022, Stephan Unverwerth <s.unverwerth@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Error.h>
+#include <AK/RefCounted.h>
+#include <AK/RefPtr.h>
+#include <AK/String.h>
+#include <AK/StringView.h>
+#include <AK/Vector.h>
+#include <LibGL/GL/glplatform.h>
+
+namespace GL {
+
+class Shader final : public RefCounted<Shader> {
+public:
+    static NonnullRefPtr<Shader> create(GLenum shader_type);
+
+    void clear_sources() { m_sources.clear(); }
+    ErrorOr<void> add_source(StringView source_code);
+    ErrorOr<void> compile();
+    GLenum type() const { return m_type; }
+
+private:
+    explicit Shader(GLenum shader_type)
+        : m_type { shader_type }
+    {
+    }
+
+    Vector<String> m_sources;
+    GLenum m_type;
+};
+
+}