1 files changed, 81 insertions, 0 deletions
diff --git a/src/renderer/builtin_materials.h b/src/renderer/builtin_materials.h
new file mode 100644
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--- /dev/null
+++ b/src/renderer/builtin_materials.h
@@ -0,0 +1,81 @@
+/**
+ * @file builtin_materials.h
+ * @author your name (you@domain.com)
+ * @brief
+ * @version 0.1
+ * @date 2024-06-15
+ *
+ * @copyright Copyright (c) 2024
+ *
+ */
+#pragma once
+
+#include "colours.h"
+#include "defines.h"
+#include "ral.h"
+#include "ral_types.h"
+
+// Currently supported materials
+// - Blinn Phong (textured)
+// - PBR (params)
+// - PBR (textured)
+
+// Thoughts
+// --------
+//
+// A material and a shader are inextricably linked. The input data for a shader needs the material.
+// However, a shader may require more than just a material?
+
+// --- Common uniform blocks
+
+/* In glsl code we call it 'MVP_Matrices' */
+typedef struct mvp_matrix_uniforms {
+  mat4 model;
+  mat4 view;
+  mat4 projection;
+} mvp_matrix_uniforms;
+
+// --- PBR (params)
+
+typedef struct pbr_params_material_uniforms {
+  vec3 albedo;
+  f32 metallic;
+  f32 roughness;
+  f32 ao;
+} pbr_params_material_uniforms;
+
+typedef struct pbr_params_light_uniforms {
+  vec3 viewPos;
+  // TODO: PointLights
+
+} pbr_params_light_uniforms;
+
+typedef struct pbr_params_bindgroup {
+  mvp_matrix_uniforms mvp_matrices;
+  pbr_params_material_uniforms material;
+  pbr_params_light_uniforms lights;
+} pbr_params_bindgroup;
+
+static shader_data_layout pbr_params_shader_layout(void* data) {
+  pbr_params_bindgroup* d = (pbr_params_bindgroup*)data;
+  bool has_data = data != NULL;
+
+  shader_binding b1 = { .label = "MVP_Matrices",
+                        .type = SHADER_BINDING_BYTES,
+                        .stores_data = has_data,
+                        .data = { .bytes = { .size = sizeof(mvp_matrix_uniforms) } } };
+
+  shader_binding b2 = { .label = "PBR_Params",
+                        .type = SHADER_BINDING_BYTES,
+                        .stores_data = has_data,
+                        .data = { .bytes = { .size = sizeof(pbr_params_material_uniforms) } } };
+
+  shader_binding b3 = { .label = "Scene_Lights",
+                        .type = SHADER_BINDING_BYTES,
+                        .stores_data = has_data,
+                        .data = { .bytes = { .size = sizeof(pbr_params_light_uniforms) } } };
+
+  return (shader_data_layout){ .name = "pbr_params", .bindings = { b1, b2, b3 }, .bindings_count = 3
+
+  };
+}