added some basic loading model controls

src/gears/game.d

@@ -2,16 +2,20 @@ import aliases;
 import includes;
 import renderer : Destroy;
 import renderer;
+import vulkan;
 import util;
+import alloc;
 import platform;
 import math;
 import core.stdc.math : cosf, sinf;
+import std.algorithm.sorting;
 
 f32 g_DELTA;
 
 struct Game
 {
 	Renderer rd;
+	Arena 	 frame_arena;
 
 	PlatformWindow* window;
 
@@ -19,6 +23,10 @@ struct Game
 	Pipeline triangle_pipeline;
 	Pipeline compute_pipeline;
 	Pipeline ui_pipeline;
+	Pipeline oit_pipeline;
+
+	ImageView 		 draw_image, depth_image;
+	ImageView			 aux_image;
 
 	GlobalUniforms globals;
 	PushConst			 pc;
@@ -27,15 +35,21 @@ struct Game
 
 	Camera camera;
 
-	Model model;
+	Model tree;
-}
+	Model rock;
+	Model magic_rock;
+	Model log;
+	Model stump;
 
+	SLList!(Model) models;
+}
 
 Game
 InitGame(PlatformWindow* window)
 {
 	Game g = { 
 		rd: InitRenderer(window), 
+		frame_arena: CreateArena(MB(16)),
 		window: window,
 		timer: CreateTimer(),
 		globals: {
@@ -45,14 +59,24 @@ InitGame(PlatformWindow* window)
 		},
 	};
 
+	Extent ext = GetExtent(&g.rd);
+
+	CreateImageView(&g.rd, &g.draw_image, ext.w, ext.h, GetDrawImageFormat(&g.rd), IU.Draw, false);
+	CreateImageView(&g.rd, &g.depth_image, ext.w, ext.h, FMT.D_SF32, IU.Depth, true);
+	CreateImageView(&g.rd, &g.aux_image, ext.w, ext.h, FMT.R_U32, IU.Storage);
+	
 	GfxPipelineInfo triangle_info = {
 		vertex_shader: "shaders/triangle.vert.spv",
 		frag_shader: "shaders/triangle.frag.spv",
+		draw_image: &g.draw_image,
+		depth_image: &g.depth_image,
 	};
 
 	GfxPipelineInfo ui_info = {
 		vertex_shader: "shaders/gui.vert.spv",
 		frag_shader: "shaders/gui.frag.spv",
+		draw_image: &g.draw_image,
+		depth_image: &g.depth_image,
 		input_rate: IR.Instance,
 		input_rate_stride: UIVertex.sizeof,
 		vertex_attributes: [
@@ -66,6 +90,8 @@ InitGame(PlatformWindow* window)
 	GfxPipelineInfo pbr_info = {
 		vertex_shader: "shaders/pbr.vert.spv",
 		frag_shader: "shaders/pbr.frag.spv",
+		draw_image: &g.draw_image,
+		depth_image: &g.depth_image,
 		input_rate_stride: Vertex.sizeof,
 		vertex_attributes: [
 			{ binding: 0, location: 0, format: FMT.RGBA_F32, offset: 0 },
@@ -76,6 +102,13 @@ InitGame(PlatformWindow* window)
 		]
 	};
 
+	GfxPipelineInfo oit_info = {
+		vertex_shader: "shaders/full_screen_triangle.vert.spv",
+		frag_shader: "shaders/oit.frag.spv",
+		draw_image: &g.draw_image,
+		depth_image: &g.depth_image,
+	};
+
 	CompPipelineInfo gradient_info = {
 		shader: "shaders/gradient.comp.spv",
 	};
@@ -83,18 +116,85 @@ InitGame(PlatformWindow* window)
 	g.pbr_pipeline = BuildGfxPipeline(&g.rd, &pbr_info);
 	g.triangle_pipeline = BuildGfxPipeline(&g.rd, &triangle_info);
 	g.ui_pipeline = BuildGfxPipeline(&g.rd, &ui_info);
+	g.oit_pipeline = BuildGfxPipeline(&g.rd, &oit_info);
 	g.compute_pipeline = BuildCompPipeline(&g.rd, &gradient_info);
 
 	PrintShader(&g.rd, &g.pbr_pipeline, VK_SHADER_STAGE_VERTEX_BIT);
 
-	g.model = LoadModel(&g.rd, "models/Tree01.m3d");
+	g.rock = LoadModel(&g.rd, "models/BigRock01.m3d");
+	g.tree = LoadModel(&g.rd, "models/Tree01.m3d");
+	g.magic_rock = LoadModel(&g.rd, "models/MagicRock01.m3d");
+	g.log = LoadModel(&g.rd, "models/Log01.m3d");
+	g.stump = LoadModel(&g.rd, "models/Stump01.m3d");
+
+	SetClearColor(&g.rd, Vec4(0.3, 0.5, 0.9, 1.0));
+
+	ClearColorEnabled(&g.rd, true);
+
+	assert(g.aux_image.view != null);
+
+	UpdateAuxImage(&g.rd, &g.aux_image);
 
 	return g;
 }
 
+void
+Copy(Model* dst, Model* src)
+{
+	dst.vertex_buffer = src.vertex_buffer;
+	dst.index_buffer = src.index_buffer;
+	dst.parts = src.parts;
+	dst.materials = src.materials;
+	dst.textures = src.textures;
+}
+
 void
 ProcessInputs(Game* g, Camera* cam)
 {
+	foreach(i; 0 .. g.window.inputs.count)
+	{
+		InputEvent event = g.window.inputs.events[i];
+		switch(event.key)
+		{
+			case Input.One:
+				{
+					Node!(Model)* node = Alloc!(Node!(Model));
+					Copy(&node.value, &g.tree);
+					node.value.pos = cam.pos;
+					PushFront(&g.models, node, null);
+				} break;
+			case Input.Two:
+				{
+					Node!(Model)* node = Alloc!(Node!(Model));
+					Copy(&node.value, &g.rock);
+					node.value.pos = cam.pos;
+					PushFront(&g.models, node, null);
+				} break;
+			case Input.Three:
+				{
+					Node!(Model)* node = Alloc!(Node!(Model));
+					Copy(&node.value, &g.magic_rock);
+					node.value.pos = cam.pos;
+					PushFront(&g.models, node, null);
+				} break;
+			case Input.Four:
+				{
+					Node!(Model)* node = Alloc!(Node!(Model));
+					Copy(&node.value, &g.log);
+					node.value.pos = cam.pos;
+					PushFront(&g.models, node, null);
+				} break;
+			case Input.Five:
+				{
+					Node!(Model)* node = Alloc!(Node!(Model));
+					Copy(&node.value, &g.stump);
+					node.value.pos = cam.pos;
+					PushFront(&g.models, node, null);
+				} break;
+			default: break;
+		}
+	}
+
 	HandleInputs(cam, &g.window.inputs);
 }
 
@@ -103,16 +203,32 @@ Cycle(Game* g)
 {
 	g_DELTA = DeltaTime(&g.timer);
 
+	Reset(&g.frame_arena);
+
 	ProcessInputs(g, &g.camera);
 
+	ResizeDrawImageIfNeeded(&g.rd, &g.draw_image);
+	ResizeDrawImageIfNeeded(&g.rd, &g.depth_image);
+	ResizeDrawImageIfNeeded(&g.rd, &g.aux_image);
+
+	UpdateAuxImage(&g.rd, &g.aux_image);
+
+	//Sort(g, g.camera.pos, &g.model);
+
 	//Update(g, &g.camera);
 
 	Update(&g.camera);
 
 	BeginFrame(&g.rd);
 
+	PrepAuxImage(&g.rd.vk, &g.aux_image);
+
 	Bind(&g.rd, &g.compute_pipeline);
 
+	ClearColor(&g.rd, &g.aux_image, Vec4(0.0));
+
+	ImageBarrier(&g.rd);
+	
 	Extent ext = GetExtent(&g.rd);
 	f32 aspect = (cast(f32)ext.x) / (cast(f32)ext.y);
 	Mat4 projection = Perspective(90.0, aspect, 10000.0, 0.1);
@@ -123,36 +239,56 @@ Cycle(Game* g)
 	g.globals.res.y = ext.y;
 	SetUniform(&g.rd, &g.globals);
 
-	//DrawRect(&g.rd, 150.0, 300.0, 500.0, 700.0, Vec4(0.0, 0.0, 1.0, 1.0));
+	BeginRendering(&g.rd, &g.draw_image, &g.depth_image);
-
-	//PrepComputeDrawImage(&g.rd);
-
-	//Dispatch(&g.rd);
-
-	BeginRender(&g.rd);
 
 	Bind(&g.rd, &g.ui_pipeline);
 
 	BindUIBuffers(&g.rd);
 
-	//DrawUI(&g.rd);
-
 	Bind(&g.rd, &g.triangle_pipeline);
 
-	//Draw(&g.rd, 3, 1);
-
 	Bind(&g.rd, &g.pbr_pipeline);
 
 	g.pc.model_matrix = Mat4Identity();
-	DrawModel(g, &g.model);
 
-	FinishFrame(&g.rd);
+	Node!(Model)* model = g.models.first;
+	for(;;)
+	{
+		if (model == null)
+		{
+			break;
+		}
+
+		DrawModel(g, &model.value);
+		model = model.next;
+	}
+
+	/*
+	ImageBarrier(&g.rd);
+
+	Bind(&g.rd, &g.oit_pipeline);
+
+	Draw(&g.rd, 3, 1);
+	*/
+
+	FinishRendering(&g.rd);
+
+	//ImageBarrier(&g.rd);
+
+	//BeginRendering(&g.rd, &g.draw_image, &g.depth_image);
+
+
+	//FinishRendering(&g.rd);
+
+	Submit(&g.rd, &g.draw_image);
 }
 
 pragma(inline): void
 DrawModel(Game* g, Model* model)
 {
 	BindBuffers(&g.rd, &model.index_buffer, &model.vertex_buffer);
+	g.pc.model_matrix = Mat4Identity();
+	Translate(&g.pc.model_matrix, model.pos);
 	foreach(i, part; model.parts)
 	{
 		g.pc.mat_id = part.mat;
@@ -169,13 +305,25 @@ Destroy(Game* g)
 	Destroy(&g.rd, &g.triangle_pipeline);
 	Destroy(&g.rd, &g.ui_pipeline);
 	Destroy(&g.rd, &g.compute_pipeline);
+
+	Node!(Model)* model = g.models.first;
+	for(;;)
+	{
+		if (model == null)
+		{
+			break;
+		}
+
+		Destroy(&g.rd, &model.value);
+		model = model.next;
+	}
 	Destroy(&g.rd);
 }
 
 struct Camera
 {
 	Vec3 velocity = Vec3(0.0);
-	Vec3 pos = Vec3(0.0, 0.0, 5.0);
+	Vec3 pos = Vec3(0.0, 0.0, 2.0);
 	f32 pitch = 0.0;
 	f32 yaw = 0.0;
 }
@@ -183,8 +331,6 @@ struct Camera
 pragma(inline): void
 HandleInputs(Camera* cam, Inputs* inputs)
 {
-	Logf("%.04f %.04f", cam.pitch, cam.yaw);
-
 	foreach(i; 0 .. inputs.count)
 	{
 		InputEvent event = inputs.events[i];
@@ -231,3 +377,28 @@ Update(Camera* cam)
 	Vec4 pos = rotation * Vec4(cam.velocity * 0.5 * g_DELTA, 0.0);
 	cam.pos += pos.xyz;
 }
+
+void
+Sort(Game* g, Vec3 pos, Model* model)
+{
+	f32[] lengths = AllocArray!(f32)(&g.frame_arena, model.positions.length);
+
+	foreach(i; 0 .. lengths.length)
+	{
+		model.pos_indices[i] = cast(u32)i;
+		lengths.ptr[i] = fabs(Norm(&pos) - Norm(model.positions.ptr + i));
+	}
+
+	makeIndex!("a < b")(lengths, model.pos_indices);
+
+	Logf("%s", model.positions.length);
+
+	foreach(i, v; model.pos_indices)
+	{
+		model.indices[i+0] = cast(u32)((3*v)+0);
+		model.indices[i+1] = cast(u32)((3*v)+1);
+		model.indices[i+2] = cast(u32)((3*v)+2);
+	}
+	
+	UpdateIndexBuffer(&g.rd, model);
+}

src/gears/main.d

@@ -14,6 +14,9 @@ import core.stdc.string : memcpy;
 // 2. Set up VK_AMD_shader_info
 // 3. Determine how to better handle inputs
 // 4. Make assets loaded from the disk in debug mode
+// 5. Set up multisampling
+// 6. Remove renderer.d and just move the interface into vulkan.d
+// 7. Remove dynamic rendering
 
 void main(string[] argv)
 {

src/gears/renderer.d

@@ -4,7 +4,7 @@ import assets;
 import util;
 import alloc;
 import vulkan;
-import vulkan : Destroy, Init, Draw, DrawIndexed, Bind, BindUIBuffers, BeginRender, SetUniform, PrepComputeDrawImage, Dispatch, FinishFrame, BeginFrame, WaitIdle, PushConstants, BindBuffers;
+import vulkan : Destroy, Init, Draw, DrawIndexed, Bind, BindUIBuffers, BeginRendering, SetUniform, PrepComputeDrawImage, Dispatch, SubmitAndPresent, BeginFrame, WaitIdle, PushConstants, BindBuffers, SetClearColor, ImageBarrier, CreateImageView, GetDrawImageFormat, FinishRendering, UpdateAuxImage, ClearColor, SubmitAndPresent;
 import assets;
 import std.math.traits : isNaN;
 import util : Logf;
@@ -25,6 +25,20 @@ enum InputRate : int
 
 alias IR = InputRate;
 
+enum ImageUsage : VkImageUsageFlagBits
+{
+	None = cast(VkImageUsageFlagBits)0,
+	Draw = VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT | 
+		     VK_IMAGE_USAGE_STORAGE_BIT | VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT,
+	Depth = VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT,
+	Texture = VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT,
+	Convert = VK_IMAGE_USAGE_STORAGE_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT,
+	Storage = VK_IMAGE_USAGE_STORAGE_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT,
+	Swapchain = VK_IMAGE_USAGE_TRANSFER_DST_BIT | VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT,
+}
+
+alias IU = ImageUsage;
+
 enum Format : VkFormat
 {
 	UINT = VK_FORMAT_R32_UINT,
@@ -33,24 +47,35 @@ enum Format : VkFormat
 	RGB_F32 = VK_FORMAT_R32G32B32_SFLOAT,
 	RGBA_F32 = VK_FORMAT_R32G32B32A32_SFLOAT,
 	RGBA_UINT = VK_FORMAT_B8G8R8A8_UINT,
+	R_U32 = VK_FORMAT_R32_UINT,
+	RG_U32 = VK_FORMAT_R32G32_UINT,
 	RGBA_UNORM = VK_FORMAT_R8G8B8A8_UNORM,
 	RGBA_SRGB = VK_FORMAT_R8G8B8A8_SRGB,
+	D_SF32 = VK_FORMAT_D32_SFLOAT,
 }
 
 alias FMT = Format;
 
-enum BufferType : int
+enum BufferType : VkBufferUsageFlagBits
 {
-	None = 0,
+	None = cast(VkBufferUsageFlagBits)0,
 	Vertex = VK_BUFFER_USAGE_VERTEX_BUFFER_BIT,
 	Index = VK_BUFFER_USAGE_INDEX_BUFFER_BIT,
 	Uniform = VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
 	Storage = VK_BUFFER_USAGE_STORAGE_BUFFER_BIT,
 	Staging = VK_BUFFER_USAGE_TRANSFER_SRC_BIT,
+	BufferView = VK_BUFFER_USAGE_STORAGE_TEXEL_BUFFER_BIT | VK_BUFFER_USAGE_UNIFORM_TEXEL_BUFFER_BIT,
 }
 
 alias BT = BufferType;
 
+enum ImageLayout : VkImageLayout
+{
+	Undefined = VK_IMAGE_LAYOUT_UNDEFINED,
+	General = VK_IMAGE_LAYOUT_GENERAL,
+	ColorAttach = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
+}
+
 struct GlobalUniforms
 {
 	Mat4 view_matrix = Mat4Identity();
@@ -85,35 +110,24 @@ struct Specialization
 
 struct GfxPipelineInfo
 {
-	string vertex_shader;
+	string 				 vertex_shader;
-	string frag_shader;
+	string 				 frag_shader;
-	InputRate input_rate;
+	InputRate 		 input_rate;
-	u32 input_rate_stride;
+	u32 					 input_rate_stride;
-	Attribute[] vertex_attributes;
+	Attribute[] 	 vertex_attributes;
 	Specialization vert_spec;
 	Specialization frag_spec;
+	ImageView*		 draw_image;
+	ImageView*		 depth_image;
 }
 
 struct CompPipelineInfo
 {
-	string 			shader;
+	string 						shader;
-	Specialization spec;
+	Specialization 		spec;
 	VkPipelineLayout *layout;
 }
 
-struct Renderer
-{
-	Arena arena;
-	Arena temp_arena;
-
-	Vulkan vk;
-	PlatformWindow* window;
-
-	UIVertex[] ui_vertex_buf;
-	u32[]			 ui_index_buf;
-	u32				 ui_count;
-}
-
 struct PushConst
 {
 	Mat4 model_matrix;
@@ -124,6 +138,8 @@ struct Extent
 {
 	u32 x;
 	u32 y;
+	alias x w;
+	alias y h;
 }
 
 struct UIVertex
@@ -161,6 +177,58 @@ struct Model
 
 	Buffer[] 		materials;
 	ImageView[] textures;
+
+	Vec3[]			positions;
+	u32[]				pos_indices;
+	u32[]				indices;
+}
+
+struct Image
+{
+	VkImage 			image;
+	VmaAllocation alloc;
+	Format 				format;
+	VkImageLayout layout;
+	u32						w;
+	u32						h;
+	bool 					depth_image;
+	ImageUsage 		usage;
+}
+
+struct BufferView
+{
+	Buffer base;
+	VkBufferView view;
+
+	alias base this;
+}
+
+struct ImageView
+{
+	Image base;
+	VkImageView view;
+
+	alias base this;
+}
+
+struct Buffer
+{
+	VkBuffer 			buffer;
+	VmaAllocation alloc;
+	u64						size;
+}
+
+struct Renderer
+{
+	Arena arena;
+	Arena temp_arena;
+
+	Vulkan vk;
+	PlatformWindow* window;
+
+	UIVertex[] ui_vertex_buf;
+	u32[]			 ui_index_buf;
+	u32				 ui_count;
 }
 
 Renderer
@@ -206,12 +274,6 @@ DrawUI(Renderer* rd)
 	DrawIndexed(rd, 6, rd.ui_count, 0);
 }
 
-pragma(inline): void
-FinishFrame(Renderer* rd)
-{
-	FinishFrame(&rd.vk);
-}
-
 pragma(inline): void
 Dispatch(Renderer* rd)
 {
@@ -231,9 +293,9 @@ SetUniform(Renderer* rd, GlobalUniforms* uniforms)
 }
 
 pragma(inline): void
-BeginRender(Renderer* rd)
+BeginRendering(Renderer* rd, ImageView* draw_image, ImageView* depth_image)
 {
-	BeginRender(&rd.vk);
+	BeginRendering(&rd.vk, draw_image, depth_image);
 }
 
 pragma(inline): void
@@ -260,6 +322,12 @@ Bind(Renderer* rd, Pipeline* pipeline)
 	Bind(&rd.vk, pipeline);
 }
 
+void
+UpdateIndexBuffer(Renderer* rd, Model* model)
+{
+	assert(Transfer(&rd.vk, &model.index_buffer, model.indices), "UpdateIndexBuffer failure");
+}
+
 void
 DrawRect(Renderer* rd, f32 p0_x, f32 p0_y, f32 p1_x, f32 p1_y, Vec4 col)
 {
@@ -371,6 +439,7 @@ LoadModel(Renderer* rd, string name)
 			case m3dp_Ka: ConvertColor(&mats[i].ambient, m3d.material[i].prop[j].value.color); break;
 			case m3dp_Ks: ConvertColor(&mats[i].specular, m3d.material[i].prop[j].value.color); break;
 			case m3dp_Ns: mats[i].shininess = m3d.material[i].prop[j].value.fnum; break;
+			case m3dp_d:  mats[i].alpha = m3d.material[i].prop[j].value.fnum; break;
 			case m3dp_map_Kd:
 				{
 					mats[i].albedo_texture = tex_lookup[m3d.material[i].prop[j].value.textureid];
@@ -386,7 +455,12 @@ LoadModel(Renderer* rd, string name)
 					mats[i].specular_texture = tex_lookup[m3d.material[i].prop[j].value.textureid];
 					mats[i].specular_has_texture = true;
 				} break;
-			default: break;
+			case m3dp_map_D:
+				{
+					mats[i].alpha_texture = tex_lookup[m3d.material[i].prop[j].value.textureid];
+					mats[i].alpha_has_texture = true;
+				} break;
+			default: Logf("Unsupported property: %s", M3DPropToStr(m3d.material[i].prop[j].type)); break;
 			}
 		}
 
@@ -438,8 +512,10 @@ LoadModel(Renderer* rd, string name)
 
 	m3dv_t* vertex;
 
-	u32[] indices = AllocArray!(u32)(&rd.temp_arena, m3d.numface * 3);
+	u32[] indices = AllocArray!(u32)(&rd.arena, m3d.numface * 3);
 	Vertex[] vertices = AllocArray!(Vertex)(&rd.temp_arena, m3d.numface * 3);
+	Vec3[] positions = AllocArray!(Vec3)(&rd.arena, m3d.numface);
+	u32[] pos_indices = AllocArray!(u32)(&rd.arena, m3d.numface);
 
 	foreach(i; 0 .. m3d.numface)
 	{
@@ -475,6 +551,11 @@ LoadModel(Renderer* rd, string name)
 		indices[i0] = i0;
 		indices[i1] = i1;
 		indices[i2] = i2;
+
+		Vec3 center = (vertices[i0].pos + vertices[i1].pos + vertices[i2].pos) / 3.0;
+
+		positions[i] = center;
+		pos_indices[i] = i;
 	}
 
 	for(u64 i = 0; i < indices.length; i += 3)
@@ -520,11 +601,55 @@ LoadModel(Renderer* rd, string name)
 	WriteDescriptors(&rd.vk, DT.Material, model.materials, mat_lookup);
 	WriteDescriptors(&rd.vk, DT.SampledImage, model.textures, tex_lookup);
 
+	model.positions = positions;
+	model.indices = indices;
+	model.pos_indices = pos_indices;
+
 	Reset(&rd.temp_arena);
 
 	return model;
 }
 
+string
+M3DPropToStr(u8 type)
+{
+	string result = "Unknown";
+	switch(type)
+	{
+		case m3dp_Kd: result = "Diffuse"; break;
+		case m3dp_Ka: result = "Ambient"; break;
+		case m3dp_Ks: result = "Specular Color"; break;
+		case m3dp_Ns: result = "Specular Exponent"; break;
+		case m3dp_Ke: result = "Emissive"; break;
+		case m3dp_Tf: result = "Transmission"; break;
+		case m3dp_Km: result = "Bump Strength"; break;
+		case m3dp_d: result = "Alpha"; break;
+		case m3dp_il: result = "Illumination"; break;
+		case m3dp_Pr: result = "Roughness"; break;
+		case m3dp_Pm: result = "Metallic"; break;
+		case m3dp_Ps: result = "Sheen"; break;
+		case m3dp_Ni: result = "Refraction"; break;
+		case m3dp_Nt: result = "Face Thickness"; break;
+		case m3dp_map_Kd: result = "Diffuse Texture"; break;
+		case m3dp_map_Ka: result = "Ambient Texture"; break;
+		case m3dp_map_Ks: result = "Specular Texture"; break;
+		case m3dp_map_Ns: result = "Specular Exponent Texture"; break;
+		case m3dp_map_Ke: result = "Emissive Texture"; break;
+		case m3dp_map_Tf: result = "Transmission Texture"; break;
+		case m3dp_map_Km: result = "Bump Map"; break;
+		case m3dp_map_D: result = "Alpha Map"; break;
+		case m3dp_map_N: result = "Normal Map"; break;
+		case m3dp_map_Pr: result = "Roughness Map"; break;
+		case m3dp_map_Pm: result = "Metallic Map"; break;
+		case m3dp_map_Ps: result = "Sheen Map"; break;
+		case m3dp_map_Ni: result = "Refraction Map"; break;
+		case m3dp_map_Nt: result = "Thickness Map"; break;
+		default: break;
+	}
+
+	return result;
+}
+
 pragma(inline): void
 CopyVertex(Vec3* dst, m3dv_t* src)
 {
@@ -557,3 +682,85 @@ PrintShader(Renderer* rd, Pipeline* pipeline, VkShaderStageFlagBits stage)
 	PrintShaderDisassembly(&rd.vk, pipeline, stage);
 }
 
+void
+SetClearColor(Renderer* rd, Vec4 color)
+{
+	SetClearColor(&rd.vk, color);
+}
+
+void
+ClearColorEnabled(Renderer* rd, bool enabled)
+{
+	rd.vk.enable_clear_color = enabled;
+}
+
+void
+ImageBarrier(Renderer* rd)
+{
+	ImageBarrier(&rd.vk);
+}
+
+void
+CreateImageView(Renderer* rd, ImageView* view, u32 w, u32 h, Format format, ImageUsage usage, bool depth_image = false)
+{
+	CreateImageView(&rd.vk, view, w, h, format, usage, depth_image);
+}
+
+Format
+GetDrawImageFormat(Renderer* rd)
+{
+	return cast(Format)GetDrawImageFormat(&rd.vk);
+}
+
+pragma(inline): void
+ResizeDrawImageIfNeeded(Renderer* rd, ImageView* view)
+{
+	Extent ext = GetExtent(rd);
+	
+	if (view.w != ext.w || view.h != ext.h)
+	{
+		Destroy(view, rd.vk.device, rd.vk.vma);
+		CreateImageView(&rd.vk, view, ext.w, ext.h, view.format, view.usage, view.depth_image);
+	}
+}
+
+void
+FinishRendering(Renderer* rd)
+{
+	FinishRendering(&rd.vk);
+}
+
+void
+Submit(Renderer* rd, ImageView* view)
+{
+	SubmitAndPresent(&rd.vk, view);
+}
+
+void
+UpdateAuxImage(Renderer* rd, ImageView* view)
+{
+	UpdateAuxImage(&rd.vk, view);
+}
+
+void
+ClearColor(Renderer* rd, ImageView* view, Vec4 color)
+{
+	ClearColor(&rd.vk, view, color);
+}
+
+void
+Destroy(Renderer* rd, Model* model)
+{
+	Destroy(&rd.vk, &model.vertex_buffer);
+	Destroy(&rd.vk, &model.index_buffer);
+	
+	foreach(i, mat; model.materials)
+	{
+		Destroy(&rd.vk, model.materials.ptr + i);
+	}
+
+	foreach(i, view; model.textures)
+	{
+		Destroy(model.textures.ptr + i, rd.vk.device, rd.vk.vma);
+	}
+}

src/gears/vulkan.d

@@ -4,6 +4,7 @@ import aliases;
 import std.stdio;
 import std.algorithm.comparison;
 import core.stdc.string : strcmp, memcpy;
+import core.stdc.stdio : Printf = printf;
 import std.format : sformat;
 import util;
 import alloc;
@@ -52,6 +53,7 @@ const char*[] VK_BASE_DEVICE_EXTENSIONS = [
 	cast(char*)VK_KHR_SWAPCHAIN_EXTENSION_NAME,
 	cast(char*)VK_KHR_UNIFORM_BUFFER_STANDARD_LAYOUT_EXTENSION_NAME,
 	cast(char*)VK_KHR_8BIT_STORAGE_EXTENSION_NAME,
+	cast(char*)"VK_KHR_dynamic_rendering_local_read",
 ];
 
 const char*[] VK_AMD_DEVICE_EXTENSIONS = [
@@ -75,11 +77,6 @@ const VkFormat[] VK_IMAGE_FORMATS = [
 	VK_FORMAT_R8G8B8A8_UNORM,
 ];
 
-const VkImageUsageFlags VK_DRAW_IMAGE_USAGE_FLAGS = VK_IMAGE_USAGE_TRANSFER_SRC_BIT | 
-																							VK_IMAGE_USAGE_TRANSFER_DST_BIT | 
-																							VK_IMAGE_USAGE_STORAGE_BIT 			|
-																							VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
-
 enum StepInitialized : u32
 {
 	Renderer = 1,
@@ -93,6 +90,7 @@ enum StepInitialized : u32
 	Swapchain,
 	DrawImages,
 	Descriptors,
+	Pipelines,
 }
 
 alias SI = StepInitialized;
@@ -108,22 +106,6 @@ enum DescType : u32
 
 alias DT = DescType;
 
-struct Image
-{
-	VkImage image;
-	VmaAllocation alloc;
-	VkFormat format;
-	VkImageLayout layout;
-}
-
-struct ImageView
-{
-	Image base;
-	VkImageView view;
-
-	alias base this;
-}
-
 struct MappedBuffer(T)
 {
 	Buffer base;
@@ -133,13 +115,6 @@ struct MappedBuffer(T)
 	alias base this;
 }
 
-struct Buffer
-{
-	VkBuffer 			buffer;
-	VmaAllocation alloc;
-	u64						size;
-}
-
 struct DescBindings
 {
 	u32[] 									free;
@@ -198,6 +173,7 @@ struct Vulkan
 	DescBindings[DT.max]		 			 desc_bindings;
 
 	VkSampler											 nearest_sampler;
+	VkSampler											 oit_sampler;
 
 	VkPipeline[FRAME_OVERLAP]			 last_pipeline;
 	VkPipelineLayout							 pipeline_layout;
@@ -220,6 +196,12 @@ struct Vulkan
 	VkPipeline										 last_comp_pipeline;
 	bool													 compute_pass_started;
 
+	bool													 enable_clear_color;
+	VkClearColorValue							 clear_color;
+
+	BufferView										 a_buffer_view;
+	ImageView											 aux_image;
+
 	alias queues this;
 }
 
@@ -294,6 +276,8 @@ Init(PlatformWindow* window, u64 permanent_mem, u64 frame_mem)
 bool
 InitConversionPipeline(Vulkan* vk)
 {
+	Push(vk, SI.Pipelines);
+
 	VkDescriptorBindingFlags[] binding_flags;
 	binding_flags[] = VK_DESCRIPTOR_BINDING_UPDATE_AFTER_BIND_BIT;
 
@@ -432,6 +416,7 @@ InitBuffers(Vulkan* vk)
 	Push(vk, SI.Buffers);
 
 	vk.global_buf = CreateMappedBuffer!(GlobalUniforms)(vk, BT.Uniform, 1);
+	vk.shader_buf = CreateMappedBuffer!(ShaderUniforms)(vk, BT.Uniform, 1);
 
 	u64 transfer_size = MB(64);
 	vk.transfer_buf = CreateMappedBuffer!(u8)(vk, BT.Staging, transfer_size);
@@ -527,27 +512,30 @@ BeginFrame(Vulkan* vk)
 }
 
 void
-BeginRender(Vulkan* vk)
+BeginRendering(Vulkan* vk, ImageView* draw_image, ImageView* depth_image)
 {
 	// TODO: probably get rid of these
-	Transition(vk.cmds[vk.frame_index], &vk.draw_image, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);
+	Transition(vk.cmds[vk.frame_index], draw_image, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);
-	Transition(vk.cmds[vk.frame_index], &vk.depth_image, VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL);
+	Transition(vk.cmds[vk.frame_index], depth_image, VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL);
 
 	VkImage image = CurrentImage(vk);
 	Transition(vk.cmds[vk.frame_index], image, VK_IMAGE_LAYOUT_UNDEFINED, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL);
 
 	VkRenderingAttachmentInfo col_attach = {
 		sType: VK_STRUCTURE_TYPE_RENDERING_ATTACHMENT_INFO,
-		imageView: vk.draw_image.view,
+		imageView: draw_image.view,
-		imageLayout: vk.draw_image.layout,
+		imageLayout: draw_image.layout,
-		loadOp: VK_ATTACHMENT_LOAD_OP_CLEAR, // CLEAR instead of LOAD if wanting to clear colors, also clearColor value (or whatever)
+		loadOp: (vk.enable_clear_color ? VK_ATTACHMENT_LOAD_OP_CLEAR : VK_ATTACHMENT_LOAD_OP_LOAD), // CLEAR instead of LOAD if wanting to clear colors, also clearColor value (or whatever)
 		storeOp: VK_ATTACHMENT_STORE_OP_STORE,
+		clearValue: {
+			color: vk.clear_color,
+		},
 	};
 
 	VkRenderingAttachmentInfo depth_attach = {
 		sType: VK_STRUCTURE_TYPE_RENDERING_ATTACHMENT_INFO,
-		imageView: vk.depth_image.view,
+		imageView: depth_image.view,
-		imageLayout: vk.depth_image.layout,
+		imageLayout: depth_image.layout,
 		loadOp: VK_ATTACHMENT_LOAD_OP_CLEAR,
 		storeOp: VK_ATTACHMENT_STORE_OP_STORE,
 	};
@@ -569,6 +557,21 @@ BeginRender(Vulkan* vk)
 	vkCmdBeginRendering(vk.cmds[vk.frame_index], &render_info);
 }
 
+void
+SetClearColor(Vulkan* vk, Vec4 color)
+{
+	vk.clear_color.float32[0] = color.r;
+	vk.clear_color.float32[1] = color.g;
+	vk.clear_color.float32[2] = color.b;
+	vk.clear_color.float32[3] = color.a;
+}
+
+void
+PrepAuxImage(Vulkan* vk, ImageView* view)
+{
+	Transition(vk.cmds[vk.frame_index], view, VK_IMAGE_LAYOUT_GENERAL);
+}
+
 void
 PrepComputeDrawImage(Vulkan* vk)
 {
@@ -576,7 +579,13 @@ PrepComputeDrawImage(Vulkan* vk)
 }
 
 void
-FinishFrame(Vulkan* vk)
+FinishRendering(Vulkan* vk)
+{
+	vkCmdEndRendering(vk.cmds[vk.frame_index]);
+}
+
+void
+SubmitAndPresent(Vulkan* vk, ImageView* draw_image)
 {
 	scope(exit) 
 	{
@@ -588,9 +597,7 @@ FinishFrame(Vulkan* vk)
 	VkSemaphore acquire_sem = vk.acquire_sems[vk.frame_index];
 	VkSemaphore submit_sem = vk.submit_sems[vk.image_index];
 
-	vkCmdEndRendering(vk.cmds[vk.frame_index]);
+	Transition(vk.cmds[vk.frame_index], draw_image, VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL);
-
-	Transition(vk.cmds[vk.frame_index], &vk.draw_image, VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL);
 
 	VkExtent2D extent = {
 		width: vk.swapchain_extent.width,
@@ -598,7 +605,7 @@ FinishFrame(Vulkan* vk)
 	};
 
 	// TODO: Find out how to copy from same dimension images (pretty sure its not blitting)
-	Copy(vk.cmds[vk.frame_index], &vk.draw_image.base, image, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, extent, extent);
+	Copy(vk.cmds[vk.frame_index], &draw_image.base, image, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, extent, extent);
 
 	Transition(vk.cmds[vk.frame_index], image, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, VK_IMAGE_LAYOUT_PRESENT_SRC_KHR);
 
@@ -736,7 +743,7 @@ TransferAssets(Vulkan* vk)
 pragma(inline): void
 CreateImageView(Vulkan* vk, ImageView* view, u32 w, u32 h, u32 ch, u8[] data)
 {
-	CreateImageView(vk, view, w, h);
+	CreateImageView(vk, view, w, h, FMT.RGBA_UNORM, IU.Texture);
 
 	if (ch == 4)
 	{
@@ -749,7 +756,7 @@ CreateImageView(Vulkan* vk, ImageView* view, u32 w, u32 h, u32 ch, u8[] data)
 		assert(Transfer(vk, &buf, data), "CreateImageView failure: Buffer Transfer error");
 
 		ImageView conv_view;
-		CreateImageView(vk, &conv_view, w, h, FMT.RGBA_F32);
+		CreateImageView(vk, &conv_view, w, h, FMT.RGBA_F32, IU.Convert);
 
 		WriteConvDescriptor(vk, &buf);
 		WriteConvDescriptor(vk, &conv_view);
@@ -853,7 +860,25 @@ FinishComputePass(Vulkan* vk)
 }
 
 pragma(inline): void
-CreateImageView(Vulkan* vk, ImageView* view, u32 w, u32 h, Format format = FMT.RGBA_UNORM)
+CreateBufferView(Vulkan* vk, BufferView* view, u64 size, Format format)
+{
+	CreateBuffer(vk, &view.base, BT.BufferView, size, false);
+
+	VkBufferViewCreateInfo info = {
+		sType: VK_STRUCTURE_TYPE_BUFFER_VIEW_CREATE_INFO,
+		buffer: view.buffer,
+		format: format,
+		range: size,
+	};
+
+	VkResult result = vkCreateBufferView(vk.device, &info, null, &view.view);
+	VkCheckA("CreateBufferView failure: vkCreateBufferView failed", result);
+
+	view.size = size;
+}
+
+pragma(inline): void
+CreateImageView(Vulkan* vk, ImageView* view, u32 w, u32 h, Format format, ImageUsage usage, bool depth_image = false)
 {
 	VmaAllocationCreateInfo alloc_info = {
 		usage: VMA_MEMORY_USAGE_GPU_ONLY,
@@ -868,7 +893,7 @@ CreateImageView(Vulkan* vk, ImageView* view, u32 w, u32 h, Format format = FMT.R
 		format: format,
 		tiling: VK_IMAGE_TILING_OPTIMAL,
 		initialLayout: VK_IMAGE_LAYOUT_UNDEFINED,
-		usage: format == FMT.RGBA_F32 ? (VK_IMAGE_USAGE_STORAGE_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT) : (VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT), 
+		usage: usage,
 		samples: VK_SAMPLE_COUNT_1_BIT,
 		extent: {
 			width: w,
@@ -884,9 +909,6 @@ CreateImageView(Vulkan* vk, ImageView* view, u32 w, u32 h, Format format = FMT.R
 		image_info.pQueueFamilyIndices = cast(const u32*)[vk.gfx_index, vk.tfer_index];
 	}
 
-	view.layout = VK_IMAGE_LAYOUT_UNDEFINED;
-	view.format = VK_FORMAT_R8G8B8A8_SRGB;
-	
 	VkResult result = vmaCreateImage(vk.vma, &image_info, &alloc_info, &view.image, &view.alloc, null);
 	// TODO: handle errors and realloc
 	assert(VkCheck("CreateImageView failure: vmaCreateImage error", result), "CreateImageView failure");
@@ -897,7 +919,7 @@ CreateImageView(Vulkan* vk, ImageView* view, u32 w, u32 h, Format format = FMT.R
 		viewType: VK_IMAGE_VIEW_TYPE_2D,
 		format: format,
 		subresourceRange: {
-			aspectMask: VK_IMAGE_ASPECT_COLOR_BIT,
+			aspectMask: (depth_image ? VK_IMAGE_ASPECT_DEPTH_BIT : VK_IMAGE_ASPECT_COLOR_BIT),
 			levelCount: 1,
 			layerCount: 1,
 		},
@@ -906,6 +928,13 @@ CreateImageView(Vulkan* vk, ImageView* view, u32 w, u32 h, Format format = FMT.R
 	result = vkCreateImageView(vk.device, &view_info, null, &view.view);
 	// TODO: also handle here
 	assert(VkCheck("CreateImageView failure: vkCreateImageView error", result), "CreateImageView failure");
+
+	view.layout = VK_IMAGE_LAYOUT_UNDEFINED;
+	view.format = format;
+	view.w = w;
+	view.h = h;
+	view.depth_image = depth_image;
+	view.usage = usage;
 }
 
 u32
@@ -977,6 +1006,27 @@ PushConstants(Vulkan* vk, PushConst* pc)
 	);
 }
 
+void
+ImageBarrier(Vulkan* vk)
+{
+	VkMemoryBarrier2 barrier = {
+		sType: VK_STRUCTURE_TYPE_MEMORY_BARRIER_2,
+		srcStageMask: VK_PIPELINE_STAGE_2_TRANSFER_BIT,
+		srcAccessMask: VK_ACCESS_2_TRANSFER_WRITE_BIT,
+		dstStageMask: VK_PIPELINE_STAGE_2_FRAGMENT_SHADER_BIT,
+		dstAccessMask: VK_ACCESS_2_SHADER_READ_BIT | VK_ACCESS_2_SHADER_WRITE_BIT,
+	};
+
+	VkDependencyInfo dependency = {
+		sType: VK_STRUCTURE_TYPE_DEPENDENCY_INFO,
+		dependencyFlags: VK_DEPENDENCY_BY_REGION_BIT,
+		memoryBarrierCount: 1,
+		pMemoryBarriers: &barrier,
+	};
+
+	vkCmdPipelineBarrier2(vk.cmds[vk.frame_index], &dependency);
+}
+
 bool
 Transfer(T)(Vulkan* vk, Buffer* buf, T[] data)
 {
@@ -1315,13 +1365,19 @@ CreateGraphicsPipeline(Vulkan* vk, GfxPipelineInfo* build_info)
 	VkPipelineRenderingCreateInfo rendering_info = {
 		sType: VK_STRUCTURE_TYPE_PIPELINE_RENDERING_CREATE_INFO,
 		colorAttachmentCount: 1,
-		pColorAttachmentFormats: &vk.draw_image.format,
+		pColorAttachmentFormats: cast(VkFormat*)&build_info.draw_image.format,
-		depthAttachmentFormat: vk.depth_image.format,
+		depthAttachmentFormat: build_info.depth_image.format,
 	};
 
 	VkPipelineColorBlendAttachmentState blend_state = {
 		colorWriteMask: VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT | VK_COLOR_COMPONENT_B_BIT | VK_COLOR_COMPONENT_A_BIT,
-		blendEnable: VK_FALSE,
+		blendEnable: VK_TRUE,
+		srcColorBlendFactor: VK_BLEND_FACTOR_SRC_ALPHA,
+		dstColorBlendFactor: VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA,
+		colorBlendOp: VK_BLEND_OP_ADD,
+		srcAlphaBlendFactor: VK_BLEND_FACTOR_SRC_ALPHA,
+		dstAlphaBlendFactor: VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA,
+		alphaBlendOp: VK_BLEND_OP_ADD,
 	};
 
 	VkPipelineColorBlendStateCreateInfo blend_info = {
@@ -1355,36 +1411,36 @@ CreateGraphicsPipeline(Vulkan* vk, GfxPipelineInfo* build_info)
 	VkPipelineShaderStageCreateInfo[] shader_info = [
 		{
 			sType: VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
-			stage: VK_SHADER_STAGE_VERTEX_BIT,
+		 	stage: VK_SHADER_STAGE_FRAGMENT_BIT,
-			pName: "main",
+		 	pName: "main",
 		},
 		{
 			sType: VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
-			stage: VK_SHADER_STAGE_FRAGMENT_BIT,
+			stage: VK_SHADER_STAGE_VERTEX_BIT,
 			pName: "main",
 		},
 	];
 
 	Arena* arena = &vk.frame_arenas[0];
 
-	u8[] vert_bytes = LoadAssetData(arena, build_info.vertex_shader);
 	u8[] frag_bytes = LoadAssetData(arena, build_info.frag_shader);
+	u8[] vert_bytes = LoadAssetData(arena, build_info.vertex_shader);
 
 	assert(vert_bytes && frag_bytes, "Unable to load shaders");
 
-	Result!(Shader) vert_module = BuildShader(vk, vert_bytes);
 	Result!(Shader) frag_module = BuildShader(vk, frag_bytes);
+	Result!(Shader)	vert_module = BuildShader(vk, vert_bytes);
 
 	assert(vert_module.ok && frag_module.ok, "Unable to build vulkan shaders");
 
 	scope(exit)
 	{
-		Destroy(vk, vert_module.value);
 		Destroy(vk, frag_module.value);
+		Destroy(vk, vert_module.value);
 	}
 
-	__traits(getMember, shader_info.ptr + 0, "module") = vert_module.value;
+	__traits(getMember, shader_info.ptr + 0, "module") = frag_module.value;
-	__traits(getMember, shader_info.ptr + 1, "module") = frag_module.value;
+	__traits(getMember, shader_info.ptr + 1, "module") = vert_module.value;
 
 	VkSpecializationInfo vert_spec_info = {
 		dataSize: build_info.vert_spec.size,
@@ -1475,6 +1531,25 @@ CreateComputePipeline(Vulkan* vk, CompPipelineInfo* comp_info)
 	return pipeline;
 }
 
+void
+ClearColor(Vulkan* vk, ImageView* view, Vec4 color)
+{
+	VkImageSubresourceRange clear_range = {
+		aspectMask: (view.depth_image ? VK_IMAGE_ASPECT_DEPTH_BIT : VK_IMAGE_ASPECT_COLOR_BIT),
+		levelCount: 1,
+		layerCount: 1,
+	};
+
+	vkCmdClearColorImage(
+		vk.cmds[vk.frame_index],
+		view.image,
+		view.layout,
+		cast(VkClearColorValue*)color.v,
+		1,
+		&clear_range
+	);
+}
+
 void
 SetUniform(Vulkan* vk, GlobalUniforms* globals)
 {
@@ -1558,6 +1633,13 @@ Destroy(Vulkan* vk)
 			break;
 		case SI.Buffers:
 			Destroy(vk, &vk.transfer_buf);
+			Destroy(vk, &vk.ui_vert_buf);
+			Destroy(vk, &vk.ui_index_buf);
+			Destroy(vk, &vk.global_buf);
+			Destroy(vk, &vk.shader_buf);
+			break;
+		case SI.Pipelines:
+			DestroyPipelines(vk);
 			break;
 		default:
 			break;
@@ -1565,6 +1647,35 @@ Destroy(Vulkan* vk)
 	}
 }
 
+void
+DestroyPipelines(Vulkan* vk)
+{
+	if (vk.conv_pipeline_layout)
+	{
+		vkDestroyPipelineLayout(vk.device, vk.conv_pipeline_layout, null);
+	}
+
+	if (vk.conv_desc_layout)
+	{
+		vkDestroyDescriptorSetLayout(vk.device, vk.conv_desc_layout, null);
+	}
+
+	if (vk.r_to_rgba_pipeline.handle)
+	{
+		vkDestroyPipeline(vk.device, vk.r_to_rgba_pipeline.handle, null);
+	}
+
+	if (vk.rg_to_rgba_pipeline.handle)
+	{
+		vkDestroyPipeline(vk.device, vk.rg_to_rgba_pipeline.handle, null);
+	}
+
+	if (vk.rgb_to_rgba_pipeline.handle)
+	{
+		vkDestroyPipeline(vk.device, vk.rgb_to_rgba_pipeline.handle, null);
+	}
+}
+
 void
 Destroy(T)(Vulkan* vk, MappedBuffer!(T)* buf)
 {
@@ -1591,6 +1702,7 @@ InitDescriptors(Vulkan* vk)
 		{ type: VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, descriptorCount: 4096 },
 		{ type: VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, descriptorCount: 4096 },
 		{ type: VK_DESCRIPTOR_TYPE_SAMPLER, descriptorCount: 4096 },
+		{ type: VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER, descriptorCount: 4096 },
 	];
 
 	VkDescriptorPoolCreateInfo pool_info = {
@@ -1606,7 +1718,17 @@ InitDescriptors(Vulkan* vk)
 
 	if (success)
 	{
-		VkDescriptorBindingFlags[4] shared_binding_flags;
+		VkDescriptorSetLayoutBinding[] shared_bindings = [
+			{ binding: 0, descriptorType: VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, descriptorCount: 1, stageFlags: VK_SHADER_STAGE_ALL },
+			{ binding: 1, descriptorType: VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, descriptorCount: 1, stageFlags: VK_SHADER_STAGE_ALL },
+			{ binding: 2, descriptorType: VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, descriptorCount: 1, stageFlags: VK_SHADER_STAGE_ALL },
+			{ binding: 3, descriptorType: VK_DESCRIPTOR_TYPE_SAMPLER, descriptorCount: 1, stageFlags: VK_SHADER_STAGE_ALL },
+			{ binding: 4, descriptorType: VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER, descriptorCount: 1, stageFlags: VK_SHADER_STAGE_ALL },
+			{ binding: 5, descriptorType: VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, descriptorCount: 1, stageFlags: VK_SHADER_STAGE_ALL },
+			{ binding: 6, descriptorType: VK_DESCRIPTOR_TYPE_SAMPLER, descriptorCount: 1, stageFlags: VK_SHADER_STAGE_ALL },
+		];
+
+		VkDescriptorBindingFlags[] shared_binding_flags = AllocArray!(VkDescriptorBindingFlags)(&vk.frame_arenas[0], shared_bindings.length);
 		shared_binding_flags[] = VK_DESCRIPTOR_BINDING_UPDATE_AFTER_BIND_BIT;
 
 		VkDescriptorSetLayoutBindingFlagsCreateInfo shared_flag_info = {
@@ -1615,13 +1737,6 @@ InitDescriptors(Vulkan* vk)
 			pBindingFlags: shared_binding_flags.ptr,
 		};
 
-		VkDescriptorSetLayoutBinding[] shared_bindings = [
-			{ binding: 0, descriptorType: VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, descriptorCount: 1, stageFlags: VK_SHADER_STAGE_ALL },
-			{ binding: 1, descriptorType: VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, descriptorCount: 1, stageFlags: VK_SHADER_STAGE_ALL },
-			{ binding: 2, descriptorType: VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, descriptorCount: 1, stageFlags: VK_SHADER_STAGE_ALL },
-			{ binding: 3, descriptorType: VK_DESCRIPTOR_TYPE_SAMPLER, descriptorCount: 1, stageFlags: VK_SHADER_STAGE_ALL },
-		];
-
 		VkDescriptorSetLayoutCreateInfo shared_set_info = {
 			sType: VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO,
 			pNext: &shared_flag_info,
@@ -1753,20 +1868,80 @@ InitDescriptors(Vulkan* vk)
 
 	if (success)
 	{
+		VkSamplerCreateInfo sampler_info = {
+			sType: VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO,
+			magFilter: VK_FILTER_LINEAR,
+			minFilter: VK_FILTER_LINEAR,
+			addressModeU: VK_SAMPLER_ADDRESS_MODE_REPEAT,
+			addressModeV: VK_SAMPLER_ADDRESS_MODE_REPEAT,
+			addressModeW: VK_SAMPLER_ADDRESS_MODE_REPEAT,
+			anisotropyEnable: VK_FALSE,
+			compareEnable: VK_FALSE,
+			borderColor: VK_BORDER_COLOR_INT_OPAQUE_BLACK,
+			mipmapMode: VK_SAMPLER_MIPMAP_MODE_NEAREST,
+			unnormalizedCoordinates: VK_FALSE,
+		};
+
+		result = vkCreateSampler(vk.device, &sampler_info, null, &vk.oit_sampler);
+		success = VkCheck("vkCreateSampler failure", result);
+	}
+
+	if (success)
+	{
+		// TODO: move this elsewhere later
+		// Also add samples/supersampling scaling
+
+		CreateBufferView(vk, &vk.a_buffer_view, (u32.sizeof * 2) * vk.swapchain_extent.width * vk.swapchain_extent.height, FMT.RG_U32);
+
+		VkDescriptorBufferInfo a_buffer_info = {
+			buffer: vk.a_buffer_view.buffer,
+			offset: 0,
+			range: VK_WHOLE_SIZE,
+		};
+
+		VkDescriptorImageInfo aux_info = {
+			sampler: vk.oit_sampler,
+			imageView: vk.aux_image.view,
+			imageLayout: VK_IMAGE_LAYOUT_GENERAL,
+		};
+
 		VkDescriptorImageInfo sampler_info = {
 			sampler: vk.nearest_sampler,
 		};
 
-		VkWriteDescriptorSet write = {
+		VkDescriptorImageInfo oit_sample_info = {
-			sType: VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET,
+			sampler: vk.oit_sampler,
-			dstSet: vk.desc_sets[DT.Shared],
-			dstBinding: 3,
-			descriptorCount: 1,
-			descriptorType: VK_DESCRIPTOR_TYPE_SAMPLER,
-			pImageInfo: &sampler_info,
 		};
 
-		vkUpdateDescriptorSets(vk.device, 1, &write, 0, null);
+		VkWriteDescriptorSet[] writes = [
+			{
+				sType: VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET,
+				dstSet: vk.desc_sets[DT.Shared],
+				dstBinding: 3,
+				descriptorCount: 1,
+				descriptorType: VK_DESCRIPTOR_TYPE_SAMPLER,
+				pImageInfo: &sampler_info,
+			},
+			{
+				sType: VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET,
+				dstSet: vk.desc_sets[DT.Shared],
+				dstBinding: 4,
+				descriptorCount: 1,
+				descriptorType: VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER,
+				pBufferInfo: &a_buffer_info,
+				pTexelBufferView: &vk.a_buffer_view.view,
+			},
+			{
+				sType: VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET,
+				dstSet: vk.desc_sets[DT.Shared],
+				dstBinding: 6,
+				descriptorCount: 1,
+				descriptorType: VK_DESCRIPTOR_TYPE_SAMPLER,
+				pImageInfo: &oit_sample_info,
+			},
+		];
+
+		vkUpdateDescriptorSets(vk.device, cast(u32)writes.length, writes.ptr, 0, null);
 
 		WriteDrawImageDesc(vk);
 	}
@@ -1774,6 +1949,31 @@ InitDescriptors(Vulkan* vk)
 	return success;
 }
 
+
+// TODO: better descriptor updating
+void
+UpdateAuxImage(Vulkan* vk, ImageView* view)
+{
+	VkDescriptorImageInfo aux_info = {
+		sampler: vk.oit_sampler,
+		imageView: view.view,
+		imageLayout: VK_IMAGE_LAYOUT_GENERAL,
+	};
+
+	assert(view.view != VK_NULL_HANDLE);
+
+	VkWriteDescriptorSet write = {
+		sType: VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET,
+		dstSet: vk.desc_sets[DT.Shared],
+		dstBinding: 5,
+		descriptorCount: 1,
+		descriptorType: VK_DESCRIPTOR_TYPE_STORAGE_IMAGE,
+		pImageInfo: &aux_info,
+	};
+
+	vkUpdateDescriptorSets(vk.device, 1, &write, 0, null);
+}
+
 void
 WriteDrawImageDesc(Vulkan* vk)
 {
@@ -2054,7 +2254,7 @@ GetDrawImageFormat(Vulkan* vk)
 			format, 
 			VK_IMAGE_TYPE_2D, 
 			VK_IMAGE_TILING_OPTIMAL,
-			VK_DRAW_IMAGE_USAGE_FLAGS,
+			IU.Draw,
 			0,
 			&props
 		);
@@ -2080,91 +2280,14 @@ CreateDrawImages(Vulkan* vk)
 	
 	bool success = true;
 
-	VkFormat draw_format = GetDrawImageFormat(vk);
+	Format draw_format = cast(Format)GetDrawImageFormat(vk);
-	VkFormat depth_format = VK_FORMAT_D32_SFLOAT;
+	Format depth_format = cast(Format)VK_FORMAT_D32_SFLOAT;
 
-	VmaAllocationCreateInfo alloc_info = {
+	u32 w = vk.swapchain_extent.width;
-		usage: VMA_MEMORY_USAGE_GPU_ONLY,
+	u32 h = vk.swapchain_extent.height;
-		requiredFlags: VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT,
-	};
 
-	VkImageCreateInfo image_info = {
+	CreateImageView(vk, &vk.draw_image, w, h, draw_format, IU.Draw, false);
-		sType: VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO,
+	CreateImageView(vk, &vk.depth_image, w, h, depth_format, IU.Depth, true);
-		imageType: VK_IMAGE_TYPE_2D,
-		mipLevels: 1,
-		arrayLayers: 1,
-		samples: VK_SAMPLE_COUNT_1_BIT,
-		tiling: VK_IMAGE_TILING_OPTIMAL,
-		usage: VK_DRAW_IMAGE_USAGE_FLAGS,
-		extent: vk.swapchain_extent,
-		format: draw_format,
-	};
-
-	VkResult result = vmaCreateImage(vk.vma, &image_info, &alloc_info, &vk.draw_image.image, &vk.draw_image.alloc, null);
-	success = VkCheck("vmaCreateImage failure", result);
-
-	if (success)
-	{
-		VkImageViewCreateInfo view_info = {
-			sType: VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO,
-			image: vk.draw_image.image,
-			format: draw_format,
-			viewType: VK_IMAGE_VIEW_TYPE_2D,
-			subresourceRange: {
-				aspectMask: VK_IMAGE_ASPECT_COLOR_BIT,
-				baseMipLevel: 0,
-				levelCount: 1,
-				baseArrayLayer: 0,
-				layerCount: 1,
-			},
-		};
-
-		result = vkCreateImageView(vk.device, &view_info, null, &vk.draw_image.view);
-		success = VkCheck("vkCreateImageView failure", result);
-	}
-
-	if (success)
-	{
-		VkImageCreateInfo depth_image_info = {
-			sType: VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO,
-			imageType: VK_IMAGE_TYPE_2D,
-			mipLevels: 1,
-			arrayLayers: 1,
-			samples: VK_SAMPLE_COUNT_1_BIT,
-			tiling: VK_IMAGE_TILING_OPTIMAL,
-			format: depth_format,
-			usage: VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT,
-			extent: vk.swapchain_extent,
-		};
-
-		result = vmaCreateImage(vk.vma, &depth_image_info, &alloc_info, &vk.depth_image.image, &vk.depth_image.alloc, null);
-		success = VkCheck("vmaCreateImage failure", result);
-	}
-
-	if (success)
-	{
-		VkImageViewCreateInfo depth_view_info = {
-			sType: VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO,
-			image: vk.depth_image.image,
-			viewType: VK_IMAGE_VIEW_TYPE_2D,
-			format: depth_format,
-			subresourceRange: {
-				aspectMask: VK_IMAGE_ASPECT_DEPTH_BIT,
-				baseMipLevel: 0,
-				levelCount: 1,
-				baseArrayLayer: 0,
-				layerCount: 1,
-			},
-		};
-
-		result = vkCreateImageView(vk.device, &depth_view_info, null, &vk.depth_image.view);
-		success = VkCheck("vmaCreateImageView failure", result);
-	}
-
-	vk.draw_image.format = draw_format;
-	vk.draw_image.layout = VK_IMAGE_LAYOUT_UNDEFINED;
-	vk.depth_image.format = depth_format;
-	vk.depth_image.layout = VK_IMAGE_LAYOUT_UNDEFINED;
 
 	return success;
 }
@@ -2218,7 +2341,7 @@ CreateSwapchain(Vulkan* vk)
 	VkSwapchainCreateInfoKHR info = {
 		sType: VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR,
 		imageArrayLayers: 1,
-		imageUsage: VK_IMAGE_USAGE_TRANSFER_DST_BIT | VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT,
+		imageUsage: IU.Swapchain,
 		compositeAlpha: VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR,
 		clipped: VK_TRUE,
 		imageSharingMode: VK_SHARING_MODE_EXCLUSIVE,
@@ -2406,6 +2529,7 @@ InitDevice(Vulkan* vk)
 			descriptorBindingSampledImageUpdateAfterBind: VK_TRUE,
 			descriptorBindingStorageImageUpdateAfterBind: VK_TRUE,
 			descriptorBindingStorageBufferUpdateAfterBind: VK_TRUE,
+			descriptorBindingStorageTexelBufferUpdateAfterBind: VK_TRUE,
 			descriptorBindingPartiallyBound: VK_TRUE,
 			shaderSampledImageArrayNonUniformIndexing: VK_TRUE,
 			shaderUniformBufferArrayNonUniformIndexing: VK_TRUE,
@@ -2427,6 +2551,7 @@ InitDevice(Vulkan* vk)
 				shaderStorageBufferArrayDynamicIndexing: VK_TRUE,
 				shaderStorageImageArrayDynamicIndexing: VK_TRUE,
 				samplerAnisotropy: VK_TRUE,
+				fragmentStoresAndAtomics: VK_TRUE,
 			},
 		};
 
@@ -2496,6 +2621,7 @@ CheckDeviceFeatures(VkPhysicalDevice device)
 	VkPhysicalDeviceFeatures features = features2.features;
 	bool result = true;
 
+	result &= cast(bool)features.fragmentStoresAndAtomics;
 	result &= cast(bool)features.shaderUniformBufferArrayDynamicIndexing;
 	result &= cast(bool)features.shaderSampledImageArrayDynamicIndexing;
 	result &= cast(bool)features.shaderStorageBufferArrayDynamicIndexing;
@@ -2505,6 +2631,7 @@ CheckDeviceFeatures(VkPhysicalDevice device)
 	result &= cast(bool)features_12.descriptorIndexing;
 	result &= cast(bool)features_12.bufferDeviceAddress;
 	result &= cast(bool)features_12.descriptorBindingUniformBufferUpdateAfterBind;
+	result &= cast(bool)features_12.descriptorBindingStorageTexelBufferUpdateAfterBind;
 	result &= cast(bool)features_12.descriptorBindingSampledImageUpdateAfterBind;
 	result &= cast(bool)features_12.descriptorBindingStorageImageUpdateAfterBind;
 	result &= cast(bool)features_12.descriptorBindingStorageBufferUpdateAfterBind;
@@ -2789,6 +2916,21 @@ DestroyFS(Vulkan* vk)
 		vkDestroyCommandPool(vk.device, vk.imm_pool, null);
 	}
 
+	if (vk.comp_cmd)
+	{
+		vkFreeCommandBuffers(vk.device, vk.comp_cmd_pool, 1, &vk.comp_cmd);
+	}
+
+	if (vk.comp_cmd_pool)
+	{
+		vkDestroyCommandPool(vk.device, vk.comp_cmd_pool, null);
+	}
+
+	if (vk.comp_fence)
+	{
+		vkDestroyFence(vk.device, vk.comp_fence, null);
+	}
+
 	foreach(sem; vk.submit_sems)
 	{
 		if (sem)

src/gears/vulkan_funcs.d

@@ -58,6 +58,7 @@ version(AMD_GPU)
 PFN_vkCreateSwapchainKHR vkCreateSwapchainKHR = null;
 PFN_vkCreateImage vkCreateImage = null;
 PFN_vkCreateImageView vkCreateImageView = null;
+PFN_vkCreateBufferView vkCreateBufferView = null;
 PFN_vkGetSwapchainImagesKHR vkGetSwapchainImagesKHR = null;
 PFN_vkGetDeviceQueue vkGetDeviceQueue = null;
 PFN_vkCreateSemaphore vkCreateSemaphore = null;
@@ -154,6 +155,7 @@ LoadDeviceFunctions(Vulkan* vk)
 	vkCreateSwapchainKHR = cast(PFN_vkCreateSwapchainKHR)vkGetDeviceProcAddr(vk.device, "vkCreateSwapchainKHR");
 	vkCreateImage = cast(PFN_vkCreateImage)vkGetDeviceProcAddr(vk.device, "vkCreateImage");
 	vkCreateImageView = cast(PFN_vkCreateImageView)vkGetDeviceProcAddr(vk.device, "vkCreateImageView");
+	vkCreateBufferView = cast(PFN_vkCreateBufferView)vkGetDeviceProcAddr(vk.device, "vkCreateBufferView");
 	vkGetSwapchainImagesKHR = cast(PFN_vkGetSwapchainImagesKHR)vkGetDeviceProcAddr(vk.device, "vkGetSwapchainImagesKHR");
 	vkGetDeviceQueue = cast(PFN_vkGetDeviceQueue)vkGetDeviceProcAddr(vk.device, "vkGetDeviceQueue");
 	vkCreateSemaphore = cast(PFN_vkCreateSemaphore)vkGetDeviceProcAddr(vk.device, "vkCreateSemaphore");

src/shaders/convert.comp.glsl

@@ -1,7 +1,6 @@
 #version 460
 
 #extension GL_EXT_shader_8bit_storage : require
-#extension GL_EXT_debug_printf : require
 
 layout (constant_id = 0) const int CHANNELS = 3;
 
@@ -35,7 +34,6 @@ void main()
 		uint index = x + y * PC.x;
 	
 		vec4 col = vec4(vec3(uint(src[index]) / 255.0), 1.0);
-		debugPrintfEXT("col = %v4f", col);
 		imageStore(dst, ivec2(x, y), col);
 	}
 	else if (CHANNELS == 2)
@@ -45,7 +43,6 @@ void main()
 		float f = uint(src[index]) / 255.0;
 		float a = uint(src[index+1]) / 255.0;
 		vec4 col = vec4(f, f, f, a);
-		debugPrintfEXT("col = %v4f", col);
 		imageStore(dst, ivec2(x, y), col);
 	}
 	else if (CHANNELS == 3)
@@ -53,7 +50,6 @@ void main()
 		uint index = (x + y * PC.x) * 3;
 
 		vec4 col = vec4(uint(src[index]) / 255.0, uint(src[index+1]) / 255.0, uint(src[index+2]) / 255.0, 1.0);
-		debugPrintfEXT("col = %v4f", col);
 		imageStore(dst, ivec2(x, y), col);
 	}
 }

src/shaders/full_screen_triangle.vert.glsl

@@ -0,0 +1,7 @@
+#version 460
+
+void main()
+{
+  vec4 pos = vec4((float((gl_VertexIndex >> 1U) & 1U)) * 4.0 - 1.0, (float(gl_VertexIndex & 1U)) * 4.0 - 1.0, 0, 1.0);
+  gl_Position = pos;
+}

src/shaders/oit.frag.glsl

@@ -0,0 +1,84 @@
+#version 460
+
+#extension GL_GOOGLE_include_directive : require
+#extension GL_EXT_nonuniform_qualifier : require
+
+#define COMPOSITE_PASS
+
+#include "structures.layout"
+
+layout (location = 0) out vec4 FragColor;
+
+void BubbleSort(inout uvec2 array[OIT_LAYERS], int n)
+{
+	for(int i = (n - 2); i >= 0; --i)
+	{
+		for(int j = 0; j <= i; ++j)
+		{
+			if(uintBitsToFloat(array[j].g) >= uintBitsToFloat(array[j+1].g))
+			{
+				uvec2 temp = array[j+1];
+				array[j+1] = array[j];
+				array[j] = temp;
+			}
+		}
+	}
+}
+
+float UnPreMultSRGBToLinear(float col)
+{
+	return (col < 0.04045f) ? (col / 12.92f) : pow((col + 0.055f) / 1.055f, 2.4f);
+}
+
+vec4 UnPreMultSRGBToLinear(vec4 col)
+{
+	col.r = UnPreMultSRGBToLinear(col.r);
+	col.g = UnPreMultSRGBToLinear(col.g);
+	col.b = UnPreMultSRGBToLinear(col.b);
+	return col;
+}
+
+void DoBlend(inout vec4 color, vec4 base_color)
+{
+	color.rgb += (1 - color.a) * base_color.rgb;
+	color.a += (1 - color.a) * base_color.a;
+}
+
+void DoBlendPacked(inout vec4 color, uint fragment)
+{
+	vec4 unpacked_color = unpackUnorm4x8(fragment);
+	//unpacked_color = UnPreMultSRGBToLinear(unpacked_color);
+	unpacked_color.rgb *= unpacked_color.a;
+	DoBlend(color, unpacked_color);
+}
+
+void main()
+{
+	ivec2 coord = ivec2(gl_FragCoord.xy);
+	int store_mask = 0;
+	int view_size = int(G.res.x) * int(G.res.y);
+	int sample_id = 0;
+	int list_pos = view_size * OIT_LAYERS * sample_id + coord.y * int(G.res.x) + coord.x;
+	uvec2 array[OIT_LAYERS];
+
+	vec4 color = vec4(0.0);
+
+	int fragments = int(imageLoad(ImageAux, coord).r);
+	fragments = min(OIT_LAYERS, fragments);
+
+	for (int i = 0; i < fragments; i++)
+	{
+		array[i] = imageLoad(ImageABuffer, list_pos + i * view_size).rg;
+	}
+
+	BubbleSort(array, fragments);
+
+	vec4 color_sum = vec4(0.0);
+
+	for(int i = 0; i < fragments; i++)
+	{
+		DoBlendPacked(color_sum, array[i].x);
+	}
+
+	FragColor = color_sum;
+}

src/shaders/pbr.frag.glsl

@@ -10,7 +10,7 @@ layout (location = 0) in struct FragDataIn {
 	vec2 uv;
 } FragData;
 
-layout (location = 0) out vec4 FragColor;
+layout (location = 0, index = 0) out vec4 FragColor;
 
 vec4 CalculateDirectionalLight(vec4 diff_col, vec4 diff_samp, vec4 light_col, vec3 dir, vec3 normal)
 {
@@ -25,10 +25,57 @@ vec4 CalculateDirectionalLight(vec4 diff_col, vec4 diff_samp, vec4 light_col, ve
 	return (ambient + diffuse);
 }
 
+float UnPreMultLinearToSRGB(float col)
+{
+	return col < 0.0031308f ? col * 12.92f : (pow(col, 1.0f / 2.4f) * 1.055f) - 0.055f;
+}
+
+vec4 UnPreMultLinearToSRGB(vec4 col)
+{
+	col.r = UnPreMultLinearToSRGB(col.x);
+	col.g = UnPreMultLinearToSRGB(col.x);
+	col.b = UnPreMultLinearToSRGB(col.x);
+	return col;
+}
+
 void main()
 {
+	ivec2 coord = ivec2(gl_FragCoord.xy);
+	int store_mask = 0;
+	int view_size = int(G.res.x) * int(G.res.y);
+	int sample_id = 0;
+	int list_pos = view_size * OIT_LAYERS  * sample_id + coord.y * int(G.res.x) + coord.x; 
+
 	vec4 col = Materials[nonuniformEXT(PC.mat_id)].diffuse;
 	vec4 tex_col = texture(sampler2D(Textures[nonuniformEXT(Materials[nonuniformEXT(PC.mat_id)].albedo_texture)], SamplerNearest), FragData.uv);
 
-	FragColor = CalculateDirectionalLight(col, tex_col, G.light_color, G.light_direction, FragData.normal);
+	vec4 out_col = CalculateDirectionalLight(col, tex_col, G.light_color, G.light_direction, FragData.normal);
+	out_col.a = 1.0;// Materials[nonuniformEXT(PC.mat_id)].alpha;
+
+	if (Materials[nonuniformEXT(PC.mat_id)].alpha_has_texture)
+	{
+		vec4 alpha_col = texture(sampler2D(Textures[nonuniformEXT(Materials[nonuniformEXT(PC.mat_id)].alpha_texture)], SamplerNearest), FragData.uv);
+		out_col.a = alpha_col.a;
+	}
+
+	FragColor = out_col;
+
+	/*
+	TODO: set up OIT again
+	vec4 srgb_col = out_col;// UnPreMultLinearToSRGB(out_col);
+
+	uvec4 store_value = uvec4(packUnorm4x8(srgb_col), floatBitsToUint(gl_FragCoord.z), store_mask, 0);
+
+	uint old_counter = imageAtomicAdd(ImageAux, coord, 1u);
+	if (old_counter < OIT_LAYERS)
+	{
+		imageStore(ImageABuffer, list_pos + int(old_counter) * view_size, store_value);
+
+		FragColor = vec4(0.0);
+	}
+	else
+	{
+		FragColor = vec4(out_col.rgb * out_col.a, out_col.a); // Change to vec4(0.0) to disable tail blending
+	}
+	*/
 }

src/shaders/structures.layout

@@ -2,6 +2,8 @@
 // **** STRUCTS MUST BE PACKED IN OPTIMAL PACKING ORDER TO MATCH D STRUCTS ****
 // ****************************************************************************
 
+#define OIT_LAYERS 8
+
 layout (set = 0, binding = 0) uniform GlobalUniforms {
 	mat4 view_matrix;
 	mat4 projection_matrix;
@@ -20,6 +22,20 @@ layout (rgba16f, set = 0, binding = 2) uniform image2D DrawImage;
 
 layout (set = 0, binding = 3) uniform sampler SamplerNearest;
 
+#ifdef COMPOSITE_PASS
+
+layout (set = 0, binding = 4, rg32ui) uniform restrict readonly uimageBuffer ImageABuffer;
+
+layout (set = 0, binding = 5, r32ui) uniform restrict readonly uimage2D ImageAux;
+
+#else
+
+layout (set = 0, binding = 4, rg32ui) uniform coherent uimageBuffer ImageABuffer;
+
+layout (set = 0, binding = 5, r32ui) uniform coherent uimage2D ImageAux;
+
+#endif
+
 layout (set = 1, binding = 0) uniform texture2D Textures[];
 
 layout (set = 2, binding = 0) uniform Material {
@@ -29,10 +45,13 @@ layout (set = 2, binding = 0) uniform Material {
 	uint albedo_texture;
 	uint ambient_texture;
 	uint specular_texture;
+	uint alpha_texture;
 	bool albedo_has_texture;
 	bool ambient_has_texture;
 	bool specular_has_texture;
+	bool alpha_has_texture;
 	float shininess;
+	float alpha;
 } Materials[];
 
 layout (push_constant) uniform Constants {

src/shared/assets.d

@@ -73,10 +73,13 @@ struct Material
 	u32 albedo_texture;
 	u32 ambient_texture;
 	u32 specular_texture;
+	u32 alpha_texture;
 	b32 albedo_has_texture;
 	b32 ambient_has_texture;
 	b32 specular_has_texture;
+	b32 alpha_has_texture;
 	f32 shininess = 0.0;
+	f32 alpha = 0.0;
 }
 
 struct TextureInfo