load pbr textures

3 files changed, 76 insertions, 18 deletions

diff --git a/src/renderer/render.c b/src/renderer/render.c
index 3a373dc..351a7e0 100644
--- a/src/renderer/render.c
+++ b/src/renderer/render.c
@@ -1,5 +1,6 @@
 #include <glfw3.h>
 #include "maths_types.h"
+#include "render_types.h"
 #define STB_IMAGE_IMPLEMENTATION
 #include <stb_image.h>
 
@@ -260,3 +261,27 @@ texture_handle texture_data_upload(texture_data data, bool free_on_upload) {
   }
   return handle;
 }
+
+/** @brief load all of the texture for a PBR material and returns an unnamed material */
+material pbr_material_load(char* albedo_path, char* normal_path, bool metal_roughness_combined,
+                           char* metallic_path, char* roughness_map, char* ao_map) {
+  material m = { 0 };
+  m.kind = MAT_PBR;
+
+  // For now we must have the required textures
+  assert(albedo_path);
+  assert(normal_path);
+  assert(metallic_path);
+  assert(metal_roughness_combined);
+
+  m.mat_data.pbr.metal_roughness_combined = metal_roughness_combined;
+  texture_data tex_data;
+  tex_data = texture_data_load(albedo_path, false);
+  m.mat_data.pbr.albedo_map = texture_data_upload(tex_data, true);
+  tex_data = texture_data_load(normal_path, false);
+  m.mat_data.pbr.normal_map = texture_data_upload(tex_data, true);
+  tex_data = texture_data_load(metallic_path, false);
+  m.mat_data.pbr.metallic_map = texture_data_upload(tex_data, true);
+
+  return m;
+}
\ No newline at end of file
diff --git a/src/renderer/render.h b/src/renderer/render.h
index 12c0ce4..35e2899 100644
--- a/src/renderer/render.h
+++ b/src/renderer/render.h
@@ -10,6 +10,7 @@
  */
 #pragma once
 
+#include "file.h"
 #include "ral_types.h"
 #include "render_types.h"
 
@@ -64,6 +65,16 @@ texture_data texture_data_load(const char* path, bool invert_y);
  */
 texture_handle texture_data_upload(texture_data data, bool free_on_upload);
 
+/** @brief load all of the texture for a PBR material and returns an unnamed material */
+material pbr_material_load(
+  char* albedo_path,
+  char* normal_path,
+  bool metal_roughness_combined,
+  char* metallic_path,
+  char* roughness_map,
+  char* ao_map
+);
+
 buffer_handle buffer_create(const char* debug_name, u64 size);
 bool buffer_destroy(buffer_handle buffer);
 sampler_handle sampler_create();
diff --git a/src/renderer/render_types.h b/src/renderer/render_types.h
index 3448226..b8ed512 100644
--- a/src/renderer/render_types.h
+++ b/src/renderer/render_types.h
@@ -54,15 +54,6 @@ C side - reload_model():
   - remove from transform graph so it isnt tried to be drawn
 */
 
-CORE_DEFINE_HANDLE(model_handle);
-
-typedef struct model {
-  str8 name;
-  mesh_darray* meshes;
-} model;
-
-TYPED_POOL(model, model)
-
 typedef struct texture {
 } texture;
 
@@ -71,6 +62,13 @@ typedef struct texture_data {
   void* image_data;
 } texture_data;
 
+typedef enum material_kind {
+  MAT_BLINN_PHONG,
+  MAT_PBR,
+  MAT_COUNT
+} material_kind;
+static const char* material_kind_names[] = { "Blinn Phong", "PBR", "Count (This should be an error)"};
+
 typedef struct blinn_phong_material {
   char name[256];
   texture diffuse_texture;
@@ -84,18 +82,47 @@ typedef struct blinn_phong_material {
   bool is_loaded;
   bool is_uploaded;
 } blinn_phong_material;
-typedef blinn_phong_material material;
+// typedef blinn_phong_material material;
 
 typedef struct pbr_parameters {
 
 } pbr_parameters;
 
 typedef struct pbr_material {
-
+  texture_handle albedo_map;
+  texture_handle normal_map;
+  bool metal_roughness_combined;
+  texture_handle metallic_map;
+  texture_handle roughness_map;
+  texture_handle ao_map;
 } pbr_material;
 
-// the default blinn-phong material. MUST be initialised with the function below
-extern material DEFAULT_MATERIAL;
+typedef struct material {
+  material_kind kind;
+  union {
+    blinn_phong_material blinn_phong;
+    pbr_material pbr;
+  } mat_data;
+  char* name;
+} material;
+
+#ifndef TYPED_MATERIAL_ARRAY
+KITC_DECL_TYPED_ARRAY(material)
+#define TYPED_MATERIAL_ARRAY
+#endif
+
+CORE_DEFINE_HANDLE(model_handle);
+
+typedef struct model {
+  str8 name;
+  mesh_darray* meshes;
+  material_darray* materials;
+} model;
+
+TYPED_POOL(model, model)
+
+// FIXME: the default blinn-phong material. MUST be initialised with the function below
+// FIXME: extern material DEFAULT_MATERIAL;
 void default_material_init();
 
 #ifndef TYPED_MODEL_ARRAY
@@ -103,11 +130,6 @@ KITC_DECL_TYPED_ARRAY(model)
 #define TYPED_MODEL_ARRAY
 #endif
 
-#ifndef TYPED_MATERIAL_ARRAY
-KITC_DECL_TYPED_ARRAY(material)
-#define TYPED_MATERIAL_ARRAY
-#endif
-
 #ifndef TYPED_ANIMATION_CLIP_ARRAY
 #include "animation.h"
 KITC_DECL_TYPED_ARRAY(animation_clip)