update asset cache and loading interface

src/asset.cpp

@@ -10,26 +10,105 @@
 
 
 // forward declarations
+
+// TODO: move to GLDebug.h?
 void dumpNodes(tinygltf::Model t_mdl);
-model* initModel(Assets* assets,
-	MemoryArena* arena,
-	tinygltf::Model t_mdl,
-	const char* filename);
-util_image* copyDiffuseTexture(Assets* assets,
-	MemoryArena* arena,
-	const tinygltf::Model& t_mdl);
 bool parseMeshNode(mesh* m,
 	MemoryArena* arena,
 	const tinygltf::Node& node,
 	const tinygltf::Model& t_mdl);
 
+model* getCachedModel(Assets* assets, u64 path_hash);
+model* loadModelFile(Assets* assets, const char* filename);
+util_image* getCachedTexture(Assets* assets, u64 path_hash);
+util_image* loadTextureFile(Assets* assets, const char* filename);
+
 
 // interface
 
 model*
-assetLoadFromFile(Assets* assets,
-	MemoryArena* arena,
+getModelByPath(Assets* assets, const char* filepath)
+{
+	model* mdl = getCachedModel(assets, utilFNV64a_str(filepath));
+
+	if (!mdl)
+		mdl = loadModelFile(assets, filepath);
+
+	return mdl;
+}
+
+util_image*
+getTextureByPath(Assets* assets, const char* filepath)
+{
+	util_image* texture =
+		getCachedTexture(assets, utilFNV64a_str(filepath));
+
+	if (!texture)
+		texture = loadTextureFile(assets, filepath);
+
+	return texture;
+}
+
+
+// internal
+
+model*
+initModel(Assets* assets,
+	tinygltf::Model t_mdl,
 	const char* filename)
+{
+	// TODO: re-alloc array when out of space
+	assert(assets->num_models < assets->max_models && assets->arena != nullptr);
+	model* mdl = &assets->models[assets->num_models];
+	assets->num_models++;
+
+	uint buf_count = t_mdl.bufferViews.size();
+	mdl->meshes = ARENA_ALLOC(assets->arena, mesh, buf_count);
+	mdl->num_meshes = t_mdl.meshes.size();
+	mdl->filepath = arenaCopyCStr(assets->arena, filename, MAX_PATH_SIZE);
+	mdl->filepath_hash = utilFNV64a_str(mdl->filepath);
+
+	return mdl;
+}
+
+util_image*
+getFreeTexture(Assets* assets)
+{
+	if (assets->num_textures < assets->max_textures)
+		return &assets->textures[assets->num_textures++];
+
+	printf("%s(), no free textures\n", __FUNCTION__);
+	return nullptr;
+}
+
+util_image*
+copyDiffuseTexture(Assets* assets, const tinygltf::Model& t_mdl)
+{
+	// NOTE: assuming material[0] since we're using pallete texture
+	assert(t_mdl.materials.size() == 1
+		&& t_mdl.textures.size() == 1
+		&& t_mdl.images.size() == 1
+		&& t_mdl.images[0].image.size() > 0);
+	tinygltf::Image t_img = t_mdl.images[0];
+
+	util_image* dtex = getFreeTexture(assets);
+	if (!dtex) return nullptr;
+
+	dtex->w = t_img.width;
+	dtex->h = t_img.height;
+	dtex->bits_per_channel = t_img.bits;
+	dtex->num_channels = t_img.component;
+	dtex->data_len = t_img.image.size();
+	dtex->pixels = ARENA_ALLOC(assets->arena, u8, dtex->data_len);
+	std::strncpy(dtex->file_path, t_img.uri.c_str(), sizeof(dtex->file_path));
+	dtex->filepath_hash = utilFNV64a_str(t_img.uri.c_str());
+	std::memcpy(dtex->pixels, t_img.image.data(), dtex->data_len);
+
+	return dtex;
+}
+
+model*
+loadModelFile(Assets* assets, const char* filename)
 {
 	tinygltf::Model t_mdl;
 	tinygltf::TinyGLTF gltf_ctx;
@@ -48,8 +127,8 @@ assetLoadFromFile(Assets* assets,
 #endif
 	// NOTE: assume we're working with a single buffer
 	assert(t_mdl.buffers.size() == 1);
-	model* mdl = initModel(assets, arena, t_mdl, filename);
-	mdl->diffuse_texture = copyDiffuseTexture(assets, arena, t_mdl);
+	model* mdl = initModel(assets, t_mdl, filename);
+	mdl->diffuse_texture = copyDiffuseTexture(assets, t_mdl);
 
 	if (mdl->diffuse_texture == nullptr) {
 		LOG(Error) << "Error Loading diffuse texture\n";
@@ -61,7 +140,11 @@ assetLoadFromFile(Assets* assets,
 
 	for (tinygltf::Node node : t_mdl.nodes) {
 		if (node.mesh >= 0) {
-			if (!parseMeshNode(&mdl->meshes[mesh_idx++], arena, node, t_mdl)) {
+			if (!parseMeshNode(&mdl->meshes[mesh_idx++],
+					assets->arena,
+					node,
+					t_mdl))
+			{
 				LOG(Error) << "Error parsing node\n";
 				return nullptr;
 			}
@@ -72,38 +155,33 @@ assetLoadFromFile(Assets* assets,
 }
 
 model*
-assetGetCachedModel(Assets* assets, uint64_t path_hash)
+getCachedModel(Assets* assets, u64 path_hash)
 {
-	for (uint i = 0; i < assets->num_models; i++) {
+	for (u32 i = 0; i < assets->num_models; i++) {
 		if (assets->models[i].filepath_hash == path_hash)
 			return &assets->models[i];
 	}
 
-	LOG(Debug) << "asset not cached: " << path_hash << "\n";
+	LOG(Debug) << "asset not cached, hash: " << path_hash << "\n";
 	return nullptr;
 }
 
-
-// internal
-
-model*
-initModel(Assets* assets,
-	MemoryArena* arena,
-	tinygltf::Model t_mdl,
-	const char* filename)
+util_image*
+loadTextureFile(Assets* assets, const char* filename)
 {
-	// TODO: re-alloc array when out of space
-	assert(assets->num_models < assets->max_models && arena != nullptr);
-	model* mdl = &assets->models[assets->num_models];
-	assets->num_models++;
+	return nullptr;
+}
 
-	uint buf_count = t_mdl.bufferViews.size();
-	mdl->meshes = ARENA_ALLOC(arena, mesh, buf_count);
-	mdl->num_meshes = t_mdl.meshes.size();
-	mdl->filepath = arenaCopyCStr(arena, filename, MAX_PATH_SIZE);
-	mdl->filepath_hash = utilFNV64a_str(mdl->filepath);
+util_image*
+getCachedTexture(Assets* assets, u64 path_hash)
+{
+	for (u32 i = 0; i < assets->num_textures; i++) {
+		if (assets->textures[i].filepath_hash == path_hash)
+			return &assets->textures[i];
+	}
 
-	return mdl;
+	LOG(Debug) << "asset not cached, hash: " << path_hash << "\n";
+	return nullptr;
 }
 
 bool
@@ -215,44 +293,6 @@ parseMeshNode(mesh* m,
 	return false;
 }
 
-util_image*
-getFreeTexture(Assets* assets)
-{
-	if (assets->num_textures < assets->max_textures)
-		return &assets->textures[assets->num_textures++];
-
-	printf("%s(), no free textures\n", __FUNCTION__);
-	return nullptr;
-}
-
-util_image*
-copyDiffuseTexture(Assets* assets,
-	MemoryArena* arena,
-	const tinygltf::Model& t_mdl)
-{
-	// NOTE: assuming material[0] since we're using pallete texture
-	assert(t_mdl.materials.size() == 1
-		&& t_mdl.textures.size() == 1
-		&& t_mdl.images.size() == 1
-		&& t_mdl.images[0].image.size() > 0);
-	tinygltf::Image t_img = t_mdl.images[0];
-
-	util_image* dtex = getFreeTexture(assets);
-	if (!dtex) return nullptr;
-
-	dtex->w = t_img.width;
-	dtex->h = t_img.height;
-	dtex->bits_per_channel = t_img.bits;
-	dtex->num_channels = t_img.component;
-	dtex->data_len = t_img.image.size();
-	dtex->pixels = ARENA_ALLOC(arena, u8, dtex->data_len);
-	std::strncpy(dtex->file_path, t_img.uri.c_str(), sizeof(dtex->file_path));
-	dtex->filepath_hash = utilFNV64a_str(t_img.uri.c_str());
-	std::memcpy(dtex->pixels, t_img.image.data(), dtex->data_len);
-
-	return dtex;
-}
-
 const char*
 getTargetStr(int target)
 {

src/asset.h

@@ -9,6 +9,7 @@
 
 
 // NOTE: wrapper for stb_image
+// TODO: better name would be AssetTexture
 struct util_image
 {
 	i32 w;
@@ -23,7 +24,7 @@ struct util_image
 
 // NOTE: wrapper for tinygltf https://github.com/syoyo/tinygltf
 // 	https://github.com/KhronosGroup/glTF
-
+// TODO: rename to Mesh or MeshAsset?
 struct mesh
 {
 	u32 num_vertices;
@@ -36,6 +37,7 @@ struct mesh
 	glm::mat4* xform;
 };
 
+// TODO: rename to Model or ModelAsset
 #define MAX_PATH_SIZE 256
 struct model
 {
@@ -59,9 +61,7 @@ struct Assets
 };
 
 
-model*
-assetLoadFromFile(Assets* assets, MemoryArena* arena, const char* filename);
+model* getModelByPath(Assets* assets, const char* filepath);
 
-model*
-assetGetCachedModel(Assets* assets, u64 path_hash);
+util_image* getTextureByPath(Assets* assets, const char* filepath);
 

src/main.cpp

@@ -249,8 +249,8 @@ loadScene(RenderState* rs)
 	if (!s_default || !s_debug) return false;
 
 	// TODO: full lighting model
-	model* tex_cube = getModelByPath(rs, "../data/textured_cube.gltf");
-	assert(tex_cube != nullptr && tex_cube->num_meshes > 0);
+	model* tex_cube = getModelByPath(&rs->assets, "../data/textured_cube.gltf");
+	assert(tex_cube != nullptr);
 	const mesh& texmesh = tex_cube->meshes[0];
 
 	GLVertexAttrib* pos_attrib = getVertexAttribByName(s_debug, "position");
@@ -279,6 +279,7 @@ loadScene(RenderState* rs)
 		Entity* e = getFreeEntity(orange_cubes);
 		assert(e != nullptr);
 
+		// FIXME: check if mesh texture is cached here?
 		if (!initEntity(e, rs->rg_arena, tex_cube, 2, attrib_mappings,
 						"debug_box"))
 		{

src/shader.cpp

@@ -211,6 +211,23 @@ initGLAttribBuffer(gl_buffer* buf, GLenum target, GLVertexAttrib* attrib)
 	buf->name = utilAllocateCStr(attrib->name);
 }
 
+// FIXME: WIP
+bool
+initGLTexture(const util_image image, GLuint& tex_id)
+{
+	glGenTextures(1, &tex_id);
+	glBindTexture(GL_TEXTURE_2D, tex_id);
+	glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+	GLenum pixel_format = (image.num_channels == 3) ? GL_RGB : GL_RGBA;
+	glTexImage2D(GL_TEXTURE_2D, 0, pixel_format, image.w, image.h, 0,
+				pixel_format, GL_UNSIGNED_BYTE, image.pixels);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+
+	return (glGetError() == GL_NO_ERROR);
+}
+// FIXME: WIP
+
 // FIXME: might as well pass in pointer to GLmesh, since that's how we're
 // 	going to use this, can void copying GLmesh twice that way
 GLmesh

src/shader.h

@@ -79,6 +79,7 @@ struct GLTexture
 	GLenum pixel_format; // NOTE: GL_RGB or GL_RGBA
 	u32 width;
 	u32 height;
+	u64 filepath_hash;
 };
 
 struct GLContext