LibGL+LibGPU+LibSoftGPU: Move Light.h to LibGPU

Userland/Libraries/LibGPU/Light.h

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2022, Jesse Buhagiar <jooster669@gmail.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibGfx/Vector3.h>
+#include <LibGfx/Vector4.h>
+
+namespace GPU {
+
+struct Light {
+    bool is_enabled { false };
+
+    // According to the OpenGL 1.5 specification, page 56, all of the parameters
+    // for the following data members (positions, colors, and reals) are all
+    // floating point.
+    Vector4<float> ambient_intensity { 0.0f, 0.0f, 0.0f, 1.0f };
+    Vector4<float> diffuse_intensity { 0.0f, 0.0f, 0.0f, 1.0f };
+    Vector4<float> specular_intensity { 0.0f, 0.0f, 0.0f, 1.0f };
+    Vector4<float> position { 0.0f, 0.0f, 1.0f, 0.0f };
+    Vector3<float> spotlight_direction { 0.0f, 0.0f, -1.0f };
+
+    float spotlight_exponent { 0.0f };
+    float spotlight_cutoff_angle { 180.0f };
+    float constant_attenuation { 1.0f };  // This is referred to `k0i` in the OpenGL spec
+    float linear_attenuation { 0.0f };    // This is referred to `k1i` in the OpenGL spec
+    float quadratic_attenuation { 0.0f }; // This is referred to `k2i` in the OpenGL spec
+};
+
+}