Vulkan TRIANGLE!!!

assets/shaders/triangle.glsl

@@ -1,12 +1,21 @@
 #if VERTEX_SHADER
 
 vec2 positions[3] = vec2[](
-    vec2(0.0, -0.5),
+    vec2(-0.5, 0.5),
     vec2(0.5, 0.5),
-    vec2(-0.5, 0.5)
+    vec2(0.0, -0.5)
 );
 
+vec3 colors[3] = vec3[](
+    vec3(1.0, 0.0, 0.0),
+    vec3(0.0, 1.0, 0.0),
+    vec3(0.0, 0.0, 1.0)
+);
+
+layout(location = 0) out vec3 VertexColor;
+
 void main() {
+  VertexColor = colors[gl_VertexIndex];
   gl_Position = vec4(positions[gl_VertexIndex], 0.0, 1.0);
 }
 
@@ -14,10 +23,12 @@ void main() {
 
 #if FRAGMENT_SHADER
 
+layout(location = 0) in vec3 VertexColor;
+
 layout(location = 0) out vec4 FragColor;
 
 void main() {
-  FragColor = vec4(0.6, 0.8, 1.0, 1.0);
+  FragColor = vec4(VertexColor, 1.0);
 }
 
 #endif

src/AssetManager.zig

@@ -27,6 +27,8 @@ const Vec3 = @import("zalgebra").Vec3;
 const Mat4 = @import("zalgebra").Mat4;
 const sdl = @import("sdl.zig");
 const tracy = @import("tracy");
+const vk = @import("vk");
+const GraphicsContext = @import("GraphicsContext.zig");
 
 pub const AssetId = assets.AssetId;
 pub const Handle = assets.Handle;
@@ -56,6 +58,7 @@ rw_lock: std.Thread.RwLock.DefaultRwLock = .{},
 asset_watcher: AssetWatcher = undefined,
 
 vertex_heap: VertexBufferHeap,
+gc: *GraphicsContext,
 
 const AssetWatcher = struct {
     assetman: *AssetManager,
@@ -145,7 +148,7 @@ const AssetWatcher = struct {
     }
 };
 
-pub fn init(allocator: std.mem.Allocator, frame_arena: std.mem.Allocator) AssetManager {
+pub fn init(allocator: std.mem.Allocator, frame_arena: std.mem.Allocator, gc: *GraphicsContext) AssetManager {
     var buf: [std.fs.MAX_PATH_BYTES]u8 = undefined;
     const exe_dir_path = std.fs.selfExeDirPath(&buf) catch @panic("can't find self exe dir path");
     const exe_dir = std.fs.openDirAbsolute(exe_dir_path, .{}) catch @panic("can't open self exe dir path");
@@ -155,6 +158,7 @@ pub fn init(allocator: std.mem.Allocator, frame_arena: std.mem.Allocator) AssetM
         .frame_arena = frame_arena,
         .exe_dir = exe_dir,
         .vertex_heap = VertexBufferHeap.init(allocator) catch @panic("OOM"),
+        .gc = gc,
     };
 }
 
@@ -212,16 +216,14 @@ pub fn resolveShaderWithDefines(self: *AssetManager, handle: Handle.Shader, defi
     return self.loadShader(handle.id, permuted_asset_id, defines);
 }
 
+// pub fn resolveShaderProgram(self: *AssetManager, handle: Handle.ShaderProgram) LoadedShaderProgram {
+//     return self.resolveShaderProgramWithDefines(handle, &.{});
+// }
+//
 pub fn resolveShaderProgram(self: *AssetManager, handle: Handle.ShaderProgram) LoadedShaderProgram {
-    return self.resolveShaderProgramWithDefines(handle, &.{});
-}
-
-pub fn resolveShaderProgramWithDefines(self: *AssetManager, handle: Handle.ShaderProgram, defines: []const DefinePair) LoadedShaderProgram {
     if (handle.id == 0) return NullShaderProgram;
 
-    const permuted_asset_id = permuteAssetIdDefines(handle.id, defines);
-
-    if (self.resolveAsset(permuted_asset_id)) |asset| {
+    if (self.resolveAsset(handle.id)) |asset| {
         switch (asset.*) {
             .shaderProgram => |shader| {
                 return shader;
@@ -230,7 +232,7 @@ pub fn resolveShaderProgramWithDefines(self: *AssetManager, handle: Handle.Shade
         }
     }
 
-    return self.loadShaderProgram(handle, permuted_asset_id, defines);
+    return self.loadShaderProgram(handle);
 }
 
 pub fn resolveMesh(self: *AssetManager, handle: Handle.Mesh) LoadedMesh {
@@ -307,88 +309,147 @@ pub const ShaderProgramDefinition = struct {
     compute: []const u8,
 };
 
-pub fn loadShaderProgram(self: *AssetManager, handle: Handle.ShaderProgram, permuted_id: AssetId, defines: []const DefinePair) LoadedShaderProgram {
-    return self.loadShaderProgramErr(handle.id, permuted_id, defines) catch |err| {
+pub fn loadShaderProgram(self: *AssetManager, handle: Handle.ShaderProgram) LoadedShaderProgram {
+    return self.loadShaderProgramErr(handle.id) catch |err| {
         std.log.err("Failed to load shader program {}\n", .{err});
 
         return NullShaderProgram;
     };
 }
 
-fn loadShaderProgramErr(self: *AssetManager, id: AssetId, permuted_id: AssetId) !LoadedShaderProgram {
+fn loadShaderProgramErr(self: *AssetManager, id: AssetId) !LoadedShaderProgram {
     const data = try self.loadFile(self.frame_arena, asset_manifest.getPath(id), SHADER_MAX_BYTES);
-    var serializer = formats.Serializer{ .write = false, .endian = formats.native_endian, .stream = .{ .const_buffer = data.bytes } };
+    var serializer = formats.Serializer{ .write = false, .endian = formats.native_endian, .stream = .{ .buffer = std.io.fixedBufferStream(data.bytes) } };
     var program: formats.ShaderProgram = undefined;
     try program.serialize(&serializer);
 
-    const prog = gl.createProgram();
-    errdefer gl.deleteProgram(prog);
-
+    const pipeline = blk: {
         switch (program) {
             .graphics => |graphics_pipeline| {
-            const vertex_shader = try self.compileShader(graphics_pipeline.vertex.source, .vertex);
-            defer gl.deleteShader(vertex_shader);
-            const fragment_shader = try self.compileShader(graphics_pipeline.fragment.source, .fragment);
-            defer gl.deleteShader(fragment_shader);
+                const vertex_shader_modle = try self.gc.device.createShaderModule(&.{
+                    .code_size = graphics_pipeline.vertex.source.len,
+                    .p_code = @alignCast(@ptrCast(graphics_pipeline.vertex.source.ptr)),
+                }, null);
+                defer self.gc.device.destroyShaderModule(vertex_shader_modle, null);
+                const fragment_shader_modle = try self.gc.device.createShaderModule(&.{
+                    .code_size = graphics_pipeline.fragment.source.len,
+                    .p_code = @alignCast(@ptrCast(graphics_pipeline.fragment.source.ptr)),
+                }, null);
+                defer self.gc.device.destroyShaderModule(fragment_shader_modle, null);
 
-            gl.attachShader(prog, vertex_shader);
-            defer gl.detachShader(prog, vertex_shader);
-            gl.attachShader(prog, fragment_shader);
-            defer gl.detachShader(prog, fragment_shader);
+                const dynamic_states = [_]vk.DynamicState{
+                    .viewport_with_count,
+                    .scissor_with_count,
+                };
 
-            gl.linkProgram(prog);
+                const pipeline_layout = try self.gc.device.createPipelineLayout(&.{}, null);
+                defer self.gc.device.destroyPipelineLayout(pipeline_layout, null);
+
+                var pipelines = [1]vk.Pipeline{.null_handle};
+                _ = try self.gc.device.createGraphicsPipelines(self.gc.pipeline_cache, 1, &.{
+                    vk.GraphicsPipelineCreateInfo{
+                        .base_pipeline_index = 0,
+                        .p_input_assembly_state = &vk.PipelineInputAssemblyStateCreateInfo{
+                            .primitive_restart_enable = vk.FALSE,
+                            .topology = .triangle_list,
+                        },
+                        .p_vertex_input_state = &vk.PipelineVertexInputStateCreateInfo{},
+                        .p_rasterization_state = &vk.PipelineRasterizationStateCreateInfo{
+                            .depth_clamp_enable = vk.FALSE,
+                            .rasterizer_discard_enable = vk.FALSE,
+                            .polygon_mode = .fill,
+                            .cull_mode = .{ .back_bit = true },
+                            .front_face = .counter_clockwise,
+                            .depth_bias_enable = vk.FALSE,
+                            .depth_bias_constant_factor = 0.0,
+                            .depth_bias_clamp = 0.0,
+                            .depth_bias_slope_factor = 0.0,
+                            .line_width = 1.0,
+                        },
+                        .p_viewport_state = &vk.PipelineViewportStateCreateInfo{},
+                        .layout = pipeline_layout,
+                        // .p_depth_stencil_state = &vk.PipelineDepthStencilStateCreateInfo{
+                        //     .depth_test_enable = true,
+                        //     .depth_write_enable = true,
+                        //     .depth_compare_op = .less,
+                        //     .depth_bounds_test_enable = true,
+                        //     .stencil_test_enable = false,
+                        //     .front = std.mem.zeroes(vk.StencilOpState),
+                        //     .back = std.mem.zeroes(vk.StencilOpState),
+                        //     .min_depth_bounds = 0.0,
+                        //     .max_depth_bounds = 1.0,
+                        // },
+                        .p_dynamic_state = &vk.PipelineDynamicStateCreateInfo{
+                            .dynamic_state_count = @intCast(dynamic_states.len),
+                            .p_dynamic_states = &dynamic_states,
+                        },
+                        .p_multisample_state = &vk.PipelineMultisampleStateCreateInfo{
+                            .sample_shading_enable = vk.FALSE,
+                            .rasterization_samples = .{ .@"1_bit" = true },
+                            .min_sample_shading = 1.0,
+                            .alpha_to_coverage_enable = vk.FALSE,
+                            .alpha_to_one_enable = vk.FALSE,
+                        },
+                        .p_color_blend_state = &vk.PipelineColorBlendStateCreateInfo{
+                            .logic_op_enable = vk.FALSE,
+                            .logic_op = .copy,
+                            .attachment_count = 0,
+                            .blend_constants = [4]f32{ 0.0, 0.0, 0.0, 0.0 },
+                        },
+                        .stage_count = 2,
+                        .p_stages = &.{
+                            vk.PipelineShaderStageCreateInfo{
+                                .module = vertex_shader_modle,
+                                .stage = .{ .vertex_bit = true },
+                                .p_name = "main",
+                            },
+                            vk.PipelineShaderStageCreateInfo{
+                                .module = fragment_shader_modle,
+                                .stage = .{ .fragment_bit = true },
+                                .p_name = "main",
+                            },
+                        },
+                        .subpass = 0,
+                    },
+                }, null, &pipelines);
+                break :blk pipelines[0];
             },
             .compute => |compute_pipeline| {
-            const compute_shader = try self.compileShader(compute_pipeline.compute.source, .compute);
-            defer gl.deleteShader(compute_shader);
+                _ = compute_pipeline; // autofix
+                return error.ComputeNotSupportedYet;
+                // const compute_shader_module = try self.gc.device.createShaderModule(&.{
+                //     .code_size = compute_pipeline.compute.source.len,
+                //     .p_code = compute_pipeline.compute.source.ptr,
+                // }, null);
+                // defer self.gc.device.destroyShaderModule(compute_shader_module, null);
 
-            gl.attachShader(prog, compute_shader);
-            defer gl.detachShader(prog, compute_shader);
-
-            gl.linkProgram(prog);
+                // var pipelines = [1]vk.Pipeline{.null_handle};
+                // _ = try self.gc.device.createGraphicsPipelines(self.gc.pipeline_cache, 1, &.{
+                //     vk.GraphicsPipelineCreateInfo{
+                //         .p_stages = &.{
+                //             vk.PipelineShaderStageCreateInfo{
+                //                 .module = compute_shader_module,
+                //                 .stage = .{ .compute_bit = true },
+                //                 .p_name = "main",
+                //             },
+                //         },
+                //         .stage_count = 1,
+                //     },
+                // }, null, &pipelines);
+                // return pipelines[0];
             },
         }
-
-    var success: c_int = 0;
-    gl.getProgramiv(prog, gl.LINK_STATUS, &success);
-
-    if (success == 0) {
-        var info_len: gl.GLint = 0;
-        gl.getProgramiv(prog, gl.INFO_LOG_LENGTH, &info_len);
-        if (info_len > 0) {
-            const info_log = try self.frame_arena.allocSentinel(u8, @intCast(info_len - 1), 0);
-            gl.getProgramInfoLog(prog, @intCast(info_log.len), null, info_log);
-            std.log.err("ERROR::PROGRAM::LINK_FAILED\n{s}\n", .{info_log});
-        } else {
-            std.log.err("ERROR::PROGRAM::LINK_FAILED\nNo info log.\n", .{});
-        }
-        return error.ProgramLinkFailed;
-    }
-
-    var program_length: gl.GLsizei = 0;
-    gl.getProgramiv(prog, gl.PROGRAM_BINARY_LENGTH, &program_length);
-
-    if (program_length > 0) {
-        const program_binary = try self.frame_arena.allocSentinel(u8, @intCast(program_length - 1), 0);
-        var binary_format: gl.GLenum = gl.NONE;
-        var return_len: gl.GLsizei = 0;
-        gl.getProgramBinary(prog, program_length, &return_len, &binary_format, @ptrCast(program_binary.ptr));
-        checkGLError();
-        if (program_length == return_len) {
-            std.log.debug("Program {s} binary:\n{s}\n", .{ asset_manifest.getPath(id), program_binary[0..@intCast(return_len)] });
-        }
-    }
+    };
 
     const loaded_shader_program = LoadedShaderProgram{
-        .program = prog,
-        .permuted_id = permuted_id,
+        .pipeline = pipeline,
     };
 
     {
         self.rw_lock.lock();
         defer self.rw_lock.unlock();
 
-        try self.loaded_assets.put(self.allocator, permuted_id, .{
+        try self.loaded_assets.put(self.allocator, id, .{
             .shaderProgram = loaded_shader_program,
         });
         try self.modified_times.put(self.allocator, id, data.modified);
@@ -403,8 +464,7 @@ const NullShader = LoadedShader{
 };
 
 const NullShaderProgram = LoadedShaderProgram{
-    .program = 0,
-    .permuted_id = 0,
+    .pipeline = .null_handle,
 };
 
 const NullMesh = LoadedMesh{
@@ -693,8 +753,7 @@ const LoadedShader = struct {
 };
 
 const LoadedShaderProgram = struct {
-    program: gl.GLuint,
-    permuted_id: AssetId,
+    pipeline: vk.Pipeline,
 };
 
 pub const LoadedMesh = struct {
@@ -1512,7 +1571,12 @@ fn freeAsset(self: *AssetManager, asset: *LoadedAsset) void {
             self.allocator.free(shader.source);
         },
         .shaderProgram => |*program| {
-            gl.deleteProgram(program.program);
+            self.gc.queues.graphics.mu.lock();
+            defer self.gc.queues.graphics.mu.unlock();
+
+            self.gc.device.queueWaitIdle(self.gc.queues.graphics.handle) catch @panic("Wait Idle failed");
+
+            self.gc.device.destroyPipeline(program.pipeline, null);
         },
         .texture => |*texture| {
             gl.GL_ARB_bindless_texture.makeTextureHandleNonResidentARB(texture.handle);

src/GraphicsContext.zig

@@ -13,20 +13,19 @@ const apis: []const vk.ApiInfo = &.{
     vk.extensions.khr_swapchain,
 };
 
+pub const Instance = vk.InstanceProxy(apis);
+pub const Device = vk.DeviceProxy(apis);
+pub const CommandBuffer = vk.CommandBufferProxy(apis);
+
 const BaseDispatch = vk.BaseWrapper(apis);
 const InstanceDispatch = vk.InstanceWrapper(apis);
-const Instance = vk.InstanceProxy(apis);
-const Device = vk.DeviceProxy(apis);
 const DeviceDispatch = Device.Wrapper;
-const CommandBuffer = vk.CommandBufferProxy(apis);
 
 const device_extensions = [_][:0]const u8{
     vk.extensions.khr_swapchain.name,
 };
 const vk_layers = [_][:0]const u8{"VK_LAYER_KHRONOS_validation"};
 
-const MAX_FRAME_LAG = 3;
-
 allocator: std.mem.Allocator = undefined,
 window: *c.SDL_Window = undefined,
 vkb: BaseDispatch = undefined,
@@ -41,19 +40,20 @@ swapchain: vk.SwapchainKHR = .null_handle,
 swapchain_extent: vk.Extent2D = .{ .width = 0, .height = 0 },
 swapchain_images: []vk.Image = &.{},
 
-// NOTE: TEST
-frame: u32 = 0,
-frame_syncs: [MAX_FRAME_LAG]Sync = [1]Sync{.{}} ** MAX_FRAME_LAG,
-command_pool: vk.CommandPool = .null_handle,
+pipeline_cache: vk.PipelineCache = .null_handle,
 
-const Sync = struct {
-    acquire_swapchain_image: vk.Semaphore = .null_handle,
-    draw_sema: vk.Semaphore = .null_handle,
-    draw_fence: vk.Fence = .null_handle,
+pub const CommandPool = struct {
+    device: Device,
+    handle: vk.CommandPool,
 
-    pub fn waitForDrawAndReset(self: *Sync, gc: *GraphicsContext) !void {
-        _ = try gc.device.waitForFences(1, &.{self.draw_fence}, vk.TRUE, std.math.maxInt(u64));
-        try gc.device.resetFences(1, &.{self.draw_fence});
+    pub fn allocateCommandBuffer(self: *const CommandPool) !CommandBuffer {
+        var cmd_bufs = [_]vk.CommandBuffer{.null_handle};
+        try self.device.allocateCommandBuffers(&.{
+            .command_pool = self.handle,
+            .level = .primary,
+            .command_buffer_count = cmd_bufs.len,
+        }, &cmd_bufs);
+        return CommandBuffer.init(cmd_bufs[0], self.device.wrapper);
     }
 };
 
@@ -110,7 +110,10 @@ pub fn init(self: *GraphicsContext, allocator: std.mem.Allocator, window: *c.SDL
     const queue_config = try selectQueues(self.instance, self.device_info.physical_device);
 
     const device_create_config = vk.DeviceCreateInfo{
-        .p_next = @ptrCast(&vk.PhysicalDeviceSynchronization2Features{ .synchronization_2 = vk.TRUE }),
+        .p_next = &vk.PhysicalDeviceVulkan13Features{
+            .dynamic_rendering = vk.TRUE,
+            .synchronization_2 = vk.TRUE,
+        },
         .p_queue_create_infos = &queue_config.queue_create_info,
         .queue_create_info_count = queue_config.queue_count,
         .p_enabled_features = &self.device_info.features,
@@ -158,36 +161,17 @@ pub fn init(self: *GraphicsContext, allocator: std.mem.Allocator, window: *c.SDL
         .device_to_host = device_to_host_queue,
     };
 
-    for (0..MAX_FRAME_LAG) |i| {
-        self.frame_syncs[i].acquire_swapchain_image = try self.device.createSemaphore(&.{}, null);
-        self.frame_syncs[i].draw_sema = try self.device.createSemaphore(&.{}, null);
-        self.frame_syncs[i].draw_fence = try self.device.createFence(&.{ .flags = .{ .signaled_bit = true } }, null);
-    }
-    self.command_pool = try self.queues.graphics.createCommandPool(.{});
+    self.pipeline_cache = try self.device.createPipelineCache(&.{}, null);
 }
 
-pub fn draw(self: *GraphicsContext) !void {
-    var cmd_bufs = [_]vk.CommandBuffer{.null_handle};
-    try self.device.allocateCommandBuffers(&.{
-        .command_pool = self.command_pool,
-        .level = .primary,
-        .command_buffer_count = cmd_bufs.len,
-    }, &cmd_bufs);
-    const test_cmd_buf = CommandBuffer.init(cmd_bufs[0], &self.vkd);
-
-    const sync = &self.frame_syncs[self.frame];
-
-    try sync.waitForDrawAndReset(self);
-
-    // Move this out into a separate func
-    const swapchain_image_index: u32 = blk: {
+pub fn acquireSwapchainImage(self: *GraphicsContext, acuire_semaphore: vk.Semaphore) !u32 {
     var found = false;
     var swapchain_img: u32 = 0;
 
     try self.maybeResizeSwapchain();
 
     while (!found) {
-            const acquire_result = try self.device.acquireNextImageKHR(self.swapchain, std.math.maxInt(u64), sync.acquire_swapchain_image, .null_handle);
+        const acquire_result = try self.device.acquireNextImageKHR(self.swapchain, std.math.maxInt(u64), acuire_semaphore, .null_handle);
 
         switch (acquire_result.result) {
             .success, .suboptimal_khr => {
@@ -212,86 +196,7 @@ pub fn draw(self: *GraphicsContext) !void {
         }
     }
 
-        break :blk swapchain_img;
-    };
-
-    const current_image = self.swapchain_images[swapchain_image_index];
-
-    try test_cmd_buf.beginCommandBuffer(&.{});
-    {
-        {
-            const img_barrier = vk.ImageMemoryBarrier2{
-                .image = current_image,
-                .old_layout = .undefined,
-                .new_layout = .transfer_dst_optimal,
-                .src_access_mask = .{},
-                .dst_access_mask = .{},
-                .src_queue_family_index = self.queues.graphics.family,
-                .dst_queue_family_index = self.queues.graphics.family,
-                .subresource_range = .{
-                    .aspect_mask = .{ .color_bit = true },
-                    .base_array_layer = 0,
-                    .base_mip_level = 0,
-                    .layer_count = 1,
-                    .level_count = 1,
-                },
-            };
-            test_cmd_buf.pipelineBarrier2(&.{
-                .p_image_memory_barriers = &.{img_barrier},
-                .image_memory_barrier_count = 1,
-            });
-        }
-        test_cmd_buf.clearColorImage(current_image, .transfer_dst_optimal, &.{ .float_32 = .{ 0.8, 0.7, 0.6, 1.0 } }, 1, &.{.{
-            .aspect_mask = .{ .color_bit = true },
-            .base_array_layer = 0,
-            .base_mip_level = 0,
-            .layer_count = 1,
-            .level_count = 1,
-        }});
-        {
-            const img_barrier = vk.ImageMemoryBarrier2{
-                .image = current_image,
-                .old_layout = .transfer_dst_optimal,
-                .new_layout = .present_src_khr,
-                .src_access_mask = .{},
-                .dst_access_mask = .{},
-                .src_queue_family_index = self.queues.graphics.family,
-                .dst_queue_family_index = self.queues.graphics.family,
-                .subresource_range = .{
-                    .aspect_mask = .{ .color_bit = true },
-                    .base_array_layer = 0,
-                    .base_mip_level = 0,
-                    .layer_count = 1,
-                    .level_count = 1,
-                },
-            };
-            test_cmd_buf.pipelineBarrier2(&.{
-                .p_image_memory_barriers = &.{img_barrier},
-                .image_memory_barrier_count = 1,
-            });
-        }
-    }
-    try test_cmd_buf.endCommandBuffer();
-
-    try self.queues.graphics.submit(
-        &SubmitInfo{
-            .wait_semaphores = &.{sync.acquire_swapchain_image},
-            .wait_dst_stage_mask = &.{.{ .transfer_bit = true }},
-            .command_buffers = &.{test_cmd_buf.handle},
-            .signal_semaphores = &.{sync.draw_sema},
-        },
-        sync.draw_fence,
-    );
-
-    _ = try self.device.queuePresentKHR(self.queues.graphics.handle, &.{
-        .swapchain_count = 1,
-        .wait_semaphore_count = 1,
-        .p_wait_semaphores = &.{sync.draw_sema},
-        .p_swapchains = &.{self.swapchain},
-        .p_image_indices = &.{swapchain_image_index},
-    });
-
-    self.frame = (self.frame + 1) % MAX_FRAME_LAG;
+    return swapchain_img;
 }
 
 fn maybeResizeSwapchain(self: *GraphicsContext) !void {
@@ -353,11 +258,14 @@ pub const QueueInstance = struct {
     handle: vk.Queue,
     family: u32,
 
-    pub fn createCommandPool(self: *Self, flags: vk.CommandPoolCreateFlags) !vk.CommandPool {
-        return self.device.createCommandPool(&.{
+    pub fn createCommandPool(self: *Self, flags: vk.CommandPoolCreateFlags) !CommandPool {
+        return .{
+            .handle = try self.device.createCommandPool(&.{
                 .flags = flags,
                 .queue_family_index = self.family,
-        }, null);
+            }, null),
+            .device = self.device,
+        };
     }
 
     pub fn submit(self: *Self, info: *const SubmitInfo, fence: vk.Fence) Device.QueueSubmitError!void {

src/Render2.zig

@@ -0,0 +1,181 @@
+const std = @import("std");
+const AssetManager = @import("AssetManager.zig");
+const GraphicsContext = @import("GraphicsContext.zig");
+const vk = @import("vk");
+const a = @import("asset_manifest");
+
+const Render2 = @This();
+
+const MAX_FRAME_LAG = 3;
+
+assetman: *AssetManager,
+gc: *GraphicsContext,
+command_pool: GraphicsContext.CommandPool,
+
+// NOTE: TEST
+frame: u32 = 0,
+frame_syncs: [MAX_FRAME_LAG]Sync = [1]Sync{.{}} ** MAX_FRAME_LAG,
+
+pub fn init(assetman: *AssetManager, gc: *GraphicsContext) !Render2 {
+    var self = Render2{
+        .assetman = assetman,
+        .gc = gc,
+        .command_pool = try gc.queues.graphics.createCommandPool(.{}),
+    };
+
+    // NOTE: TEST
+    for (0..MAX_FRAME_LAG) |i| {
+        self.frame_syncs[i].acquire_swapchain_image = try self.gc.device.createSemaphore(&.{}, null);
+        self.frame_syncs[i].draw_sema = try self.gc.device.createSemaphore(&.{}, null);
+        self.frame_syncs[i].draw_fence = try self.gc.device.createFence(&.{ .flags = .{ .signaled_bit = true } }, null);
+    }
+    return self;
+}
+
+pub fn draw(self: *Render2) !void {
+    const sync = &self.frame_syncs[self.frame];
+
+    try sync.waitForDrawAndReset(self.gc.device);
+
+    // Move this out into a separate func
+    const swapchain_image_index: u32 = try self.gc.acquireSwapchainImage(sync.acquire_swapchain_image);
+
+    const current_image = self.gc.swapchain_images[swapchain_image_index];
+    const current_image_view = try self.gc.device.createImageView(&.{
+        .components = .{ .r = .r, .g = .g, .b = .b, .a = .a },
+        .format = .r8g8b8a8_unorm,
+        .view_type = .@"2d",
+        .subresource_range = .{
+            .aspect_mask = .{ .color_bit = true },
+            .base_array_layer = 0,
+            .base_mip_level = 0,
+            .layer_count = 1,
+            .level_count = 1,
+        },
+        .image = current_image,
+    }, null);
+    defer self.gc.device.destroyImageView(current_image_view, null);
+
+    const cmds = try self.command_pool.allocateCommandBuffer();
+
+    try cmds.beginCommandBuffer(&.{});
+    {
+        {
+            const img_barrier = vk.ImageMemoryBarrier2{
+                .image = current_image,
+                .old_layout = .undefined,
+                .new_layout = .color_attachment_optimal,
+                .src_access_mask = .{},
+                .dst_access_mask = .{ .color_attachment_write_bit = true },
+                .dst_stage_mask = .{ .color_attachment_output_bit = true },
+                .src_queue_family_index = self.gc.queues.graphics.family,
+                .dst_queue_family_index = self.gc.queues.graphics.family,
+                .subresource_range = .{
+                    .aspect_mask = .{ .color_bit = true },
+                    .base_array_layer = 0,
+                    .base_mip_level = 0,
+                    .layer_count = 1,
+                    .level_count = 1,
+                },
+            };
+            cmds.pipelineBarrier2(&.{
+                .p_image_memory_barriers = &.{img_barrier},
+                .image_memory_barrier_count = 1,
+            });
+        }
+
+        {
+            cmds.beginRendering(&.{
+                .render_area = vk.Rect2D{ .offset = .{ .x = 0, .y = 0 }, .extent = self.gc.swapchain_extent },
+                .layer_count = 1,
+                .view_mask = 0,
+                .color_attachment_count = 1,
+                .p_color_attachments = &.{
+                    vk.RenderingAttachmentInfo{
+                        .clear_value = .{ .color = .{ .float_32 = .{ 0.8, 0.7, 0.6, 1.0 } } },
+                        .load_op = .clear,
+                        .store_op = .store,
+                        .image_layout = .color_attachment_optimal,
+                        .image_view = current_image_view,
+                        .resolve_image_layout = .color_attachment_optimal,
+                        .resolve_mode = .{},
+                    },
+                },
+            });
+            defer cmds.endRendering();
+
+            cmds.bindPipeline(.graphics, self.assetman.resolveShaderProgram(a.ShaderPrograms.shaders.triangle).pipeline);
+
+            cmds.setViewportWithCount(1, &.{vk.Viewport{
+                .x = 0,
+                .y = 0,
+                .width = @floatFromInt(self.gc.swapchain_extent.width),
+                .height = @floatFromInt(self.gc.swapchain_extent.height),
+                .min_depth = 0,
+                .max_depth = 1,
+            }});
+            cmds.setScissorWithCount(1, &.{vk.Rect2D{
+                .offset = .{ .x = 0, .y = 0 },
+                .extent = self.gc.swapchain_extent,
+            }});
+
+            cmds.draw(3, 1, 0, 0);
+        }
+
+        {
+            const img_barrier = vk.ImageMemoryBarrier2{
+                .image = current_image,
+                .old_layout = .color_attachment_optimal,
+                .new_layout = .present_src_khr,
+                .src_access_mask = .{ .color_attachment_write_bit = true },
+                .dst_access_mask = .{},
+                .src_stage_mask = .{ .color_attachment_output_bit = true },
+                .src_queue_family_index = self.gc.queues.graphics.family,
+                .dst_queue_family_index = self.gc.queues.graphics.family,
+                .subresource_range = .{
+                    .aspect_mask = .{ .color_bit = true },
+                    .base_array_layer = 0,
+                    .base_mip_level = 0,
+                    .layer_count = 1,
+                    .level_count = 1,
+                },
+            };
+            cmds.pipelineBarrier2(&.{
+                .p_image_memory_barriers = &.{img_barrier},
+                .image_memory_barrier_count = 1,
+            });
+        }
+    }
+    try cmds.endCommandBuffer();
+
+    try self.gc.queues.graphics.submit(
+        &GraphicsContext.SubmitInfo{
+            .wait_semaphores = &.{sync.acquire_swapchain_image},
+            .wait_dst_stage_mask = &.{.{ .transfer_bit = true }},
+            .command_buffers = &.{cmds.handle},
+            .signal_semaphores = &.{sync.draw_sema},
+        },
+        sync.draw_fence,
+    );
+
+    _ = try self.gc.device.queuePresentKHR(self.gc.queues.graphics.handle, &.{
+        .swapchain_count = 1,
+        .wait_semaphore_count = 1,
+        .p_wait_semaphores = &.{sync.draw_sema},
+        .p_swapchains = &.{self.gc.swapchain},
+        .p_image_indices = &.{swapchain_image_index},
+    });
+
+    self.frame = (self.frame + 1) % MAX_FRAME_LAG;
+}
+
+const Sync = struct {
+    acquire_swapchain_image: vk.Semaphore = .null_handle,
+    draw_sema: vk.Semaphore = .null_handle,
+    draw_fence: vk.Fence = .null_handle,
+
+    pub fn waitForDrawAndReset(self: *Sync, device: GraphicsContext.Device) !void {
+        _ = try device.waitForFences(1, &.{self.draw_fence}, vk.TRUE, std.math.maxInt(u64));
+        try device.resetFences(1, &.{self.draw_fence});
+    }
+};

src/formats.zig

@@ -153,13 +153,16 @@ pub const ShaderProgram = union(ShaderProgramPipelineType) {
                 if (!serializer.write) {
                     self.* = .{ .graphics = undefined };
                 }
+                try serializer.skipAlign(4);
                 try serializer.serializeByteSlice(&self.graphics.vertex.source);
+                try serializer.skipAlign(4);
                 try serializer.serializeByteSlice(&self.graphics.fragment.source);
             },
             .compute => {
                 if (!serializer.write) {
                     self.* = .{ .compute = undefined };
                 }
+                try serializer.skipAlign(4);
                 try serializer.serializeByteSlice(&self.compute.compute.source);
             },
         }
@@ -217,11 +220,23 @@ pub const Serializer = struct {
         }
     }
 
+    pub fn skipAlign(self: *Serializer, alignment: u64) !void {
+        const pos = try self.stream.getPos();
+        const new_pos = std.mem.alignForward(u64, pos, alignment);
+        try self.stream.seekTo(new_pos);
+    }
+
     pub fn serializeBytes(self: *Serializer, data: *[]u8) !void {
         if (self.write) {
             _ = try self.stream.write(data.*);
         } else {
-            _ = try self.stream.read(data.*);
+            switch (self.stream) {
+                .buffer => |*buf| {
+                    data.* = buf.buffer[buf.pos .. buf.pos + data.len];
+                    buf.seekBy(@intCast(data.len)) catch @panic("INVALID READ STREAM SIZE");
+                },
+                else => @panic("UNSUPPORTED READ STREAM"),
+            }
         }
     }
 

src/game.zig

@@ -6,6 +6,7 @@ const c = @import("sdl.zig");
 // const gl = @import("gl.zig");
 const AssetManager = @import("AssetManager.zig");
 const Render = @import("Render.zig");
+const Render2 = @import("Render2.zig");
 const formats = @import("formats.zig");
 const za = @import("zalgebra");
 const Vec2 = za.Vec2;
@@ -173,7 +174,8 @@ export fn game_init(global_allocator: *std.mem.Allocator) void {
     globals.g_mem.* = .{
         .global_allocator = global_allocator.*,
         .frame_fba = std.heap.FixedBufferAllocator.init(frame_arena_buffer),
-        .assetman = AssetManager.init(global_allocator.*, globals.g_mem.frame_fba.allocator()),
+        .assetman = AssetManager.init(global_allocator.*, globals.g_mem.frame_fba.allocator(), &globals.g_init.gc),
+        .render2 = Render2.init(&globals.g_mem.assetman, &globals.g_init.gc) catch @panic("OOM"),
         // .render = Render.init(global_allocator.*, globals.g_mem.frame_fba.allocator(), &globals.g_mem.assetman),
         .world = .{ .frame_arena = globals.g_mem.frame_fba.allocator() },
     };
@@ -461,7 +463,7 @@ export fn game_update() bool {
         }
     }
 
-    ginit.gc.draw() catch @panic("draw error");
+    gmem.render2.draw() catch @panic("RENDER ERROR");
 
     // Render
     if (false) {

src/globals.zig

@@ -1,6 +1,7 @@
 const std = @import("std");
 const c = @import("sdl.zig");
 const Render = @import("Render.zig");
+const Render2 = @import("Render2.zig");
 const AssetManager = @import("AssetManager.zig");
 const World = @import("entity.zig").World;
 const GraphicsContext = @import("GraphicsContext.zig");
@@ -36,6 +37,7 @@ pub const GameMemory = struct {
     frame_fba: std.heap.FixedBufferAllocator,
     assetman: AssetManager,
     render: Render = undefined,
+    render2: Render2,
     performance_frequency: u64 = 0,
     last_frame_time: u64 = 0,
     delta_time: f32 = 0.0000001,