src/flow/World.zig

@@ -31,14 +31,14 @@ pub fn create_event(self: *Self, label: []const u8) std.mem.Allocator.Error!Even
 }
 
 pub fn deinit(self: *Self) void {
-	for (&self.thread_restricted_resources) |*resources| {
-		resources.deinit();
-	}
-
 	for (self.event_systems.values) |*schedule| {
 		schedule.deinit(self);
 	}
 
+	for (&self.thread_restricted_resources) |*resources| {
+		resources.deinit();
+	}
+
 	if (self.thread_pool) |thread_pool| {
 		thread_pool.deinit();
 		coral.heap.allocator.destroy(thread_pool);

src/flow/flow.zig

@@ -255,7 +255,7 @@ fn parameter_type(comptime Value: type) *const system.Info.Parameter {
 					}
 				}
 
-				Value.unbind(node);
+				Value.unbind(&node.param, context);
 				allocator.destroy(node);
 			}
 		}

src/ona/gfx.zig

@@ -4,15 +4,13 @@ pub const colors = @import("./gfx/colors.zig");
 
 const coral = @import("coral");
 
-const bmp = @import("./gfx/bmp.zig");
-
 const ext = @import("./ext.zig");
 
 const flow = @import("flow");
 
 const msg = @import("./msg.zig");
 
-const sokol = @import("./gfx/sokol.zig");
+const rendering = @import("./gfx/rendering.zig");
 
 const std = @import("std");
 
@@ -261,9 +259,9 @@ pub const Commands = struct {
 		};
 	}
 
-	pub fn init(state: *Param) Commands {
+	pub fn init(param: *Param) Commands {
 		return .{
-			.pending = state.pending_list(),
+			.pending = param.pending_list(),
 		};
 	}
 
@@ -280,6 +278,10 @@ pub const Commands = struct {
 		});
 	}
 
+	pub fn unbind(param: *Param, _: flow.system.UnbindContext) void {
+		param.deinit();
+	}
+
 	pub fn set_target(self: Commands, command: SetTargetCommand) std.mem.Allocator.Error!void {
 		try self.pending.stack.push_grow(.{.set_target = command});
 	}
@@ -361,6 +363,80 @@ pub const Transform2D = extern struct {
 	const Vector = @Vector(2, f32);
 };
 
+fn load_bmp_texture(arena: *std.heap.ArenaAllocator, storage: coral.files.Storage, path: []const u8) !Texture.Desc {
+	const header = try storage.read_little(path, 0, extern struct {
+		type: [2]u8 align (1),
+		file_size: u32 align (1),
+		reserved: [2]u16 align (1),
+		image_offset: u32 align (1),
+		header_size: u32 align (1),
+		pixel_width: i32 align (1),
+		pixel_height: i32 align (1),
+		color_planes: u16 align (1),
+		bits_per_pixel: u16 align (1),
+		compression_method: u32 align (1),
+		image_size: u32 align(1),
+		pixels_per_meter_x: i32 align (1),
+		pixels_per_meter_y: i32 align (1),
+		palette_colors_used: u32 align (1),
+		important_colors_used: u32 align (1),
+	}) orelse {
+		return error.FormatUnsupported;
+	};
+
+	if (!std.mem.eql(u8, &header.type, "BM")) {
+		return error.FormatUnsupported;
+	}
+
+	const pixel_width = std.math.cast(u16, header.pixel_width) orelse {
+		return error.FormatUnsupported;
+	};
+
+	const pixels = try arena.allocator().alloc(coral.io.Byte, header.image_size);
+	const bytes_per_pixel = header.bits_per_pixel / coral.io.bits_per_byte;
+	const alignment = 4;
+	const byte_stride = pixel_width * bytes_per_pixel;
+	const padded_byte_stride = alignment * @divTrunc((byte_stride + alignment - 1), alignment);
+	const byte_padding = coral.scalars.sub(padded_byte_stride, byte_stride) orelse 0;
+	var buffer_offset: usize = 0;
+	var file_offset = @as(usize, header.image_offset);
+
+	switch (header.bits_per_pixel) {
+		32 => {
+			while (buffer_offset < pixels.len) {
+				const line = pixels[buffer_offset .. buffer_offset + byte_stride];
+
+				if (try storage.read(path, line, file_offset) != byte_stride) {
+					return error.FormatUnsupported;
+				}
+
+				for (0 .. pixel_width) |i| {
+					const line_offset = i * 4;
+					const pixel = line[line_offset .. line_offset + 4];
+
+					std.mem.swap(u8, &pixel[0], &pixel[2]);
+				}
+
+				file_offset += line.len + byte_padding;
+				buffer_offset += padded_byte_stride;
+			}
+		},
+
+		else => return error.FormatUnsupported,
+	}
+
+	return .{
+		.format = .rgba8,
+
+		.access = .{
+			.static = .{
+				.width = pixel_width,
+				.data = pixels,
+			},
+		},
+	};
+}
+
 pub fn poll(app: flow.Write(App), inputs: msg.Send(Input)) !void {
 	var event = @as(ext.SDL_Event, undefined);
 
@@ -395,12 +471,15 @@ pub fn setup(world: *flow.World, events: App.Events) (error {Unsupported} || std
 		assets.deinit();
 	}
 
-	assets.has_worker_thread = try std.Thread.spawn(.{}, sokol.run, .{&assets.pending_work, assets.window});
+	assets.has_worker_thread = try std.Thread.spawn(.{}, rendering.process_work, .{
+		&assets.pending_work,
+		assets.window,
+	});
 
 	const builtin_texture_formats = [_]Assets.TextureFormat{
 		.{
 			.extension = "bmp",
-			.load_file = bmp.load_file,
+			.load_file = load_bmp_texture,
 		},
 	};
 

src/ona/gfx/Resources.zig

@@ -0,0 +1,518 @@
+const coral = @import("coral");
+
+const gfx = @import("../gfx.zig");
+
+const sokol = @import("sokol");
+
+const spirv = @import("./spirv.zig");
+
+const std = @import("std");
+
+effects: EffectPool,
+textures: TexturePool,
+
+pub const Effect = struct {
+	shader: sokol.gfx.Shader,
+	pipeline: sokol.gfx.Pipeline,
+	properties: []coral.io.Byte,
+
+	pub fn deinit(self: *Effect) void {
+		coral.heap.allocator.free(self.properties);
+		sokol.gfx.destroyPipeline(self.pipeline);
+		sokol.gfx.destroyShader(self.shader);
+
+		self.* = undefined;
+	}
+
+	pub fn init(desc: gfx.Effect.Desc) spirv.Error!Effect {
+		var spirv_arena = std.heap.ArenaAllocator.init(coral.heap.allocator);
+
+		defer {
+			spirv_arena.deinit();
+		}
+
+		const spirv_program = try spirv.analyze(&spirv_arena, .{
+			.target = try switch (sokol.gfx.queryBackend()) {
+				.GLCORE => spirv.Target.glsl,
+				else => error.InvalidSPIRV,
+			},
+
+			.vertex_source = .{
+				.ops = &spirv.to_ops(@embedFile("./shaders/2d_default.vert.spv")),
+			},
+
+			.fragment_source = .{
+				.ops = desc.fragment_spirv_ops,
+			},
+		});
+
+		const shader = sokol.gfx.makeShader(shader_desc: {
+			const shader_desc = sokol.gfx.ShaderDesc{
+				.vs = stage_desc(spirv_program.vertex_stage),
+				.fs = stage_desc(spirv_program.fragment_stage),
+			};
+
+			// TODO: Vertex attributes, for some reason they aren't needed?
+
+			break: shader_desc shader_desc;
+		});
+
+		// TODO: Review blending rules.
+		const pipeline = sokol.gfx.makePipeline(pipeline_desc: {
+			var pipeline_desc = sokol.gfx.PipelineDesc{
+				.label = "Effect pipeline",
+				.layout = vertex_layout_state,
+				.shader = shader,
+				.index_type = .UINT16,
+				.blend_color = .{.r = 1.0, .g = 1.0, .b = 1.0, .a = 1.0},
+			};
+
+			pipeline_desc.colors[0] = .{
+				.write_mask = .RGBA,
+
+				.blend = .{
+					.enabled = true,
+					.src_factor_rgb = .SRC_ALPHA,
+					.dst_factor_rgb = .ONE_MINUS_SRC_ALPHA,
+				},
+			};
+
+			break: pipeline_desc pipeline_desc;
+		});
+
+		const properties = try coral.heap.allocator.alloc(
+			coral.io.Byte,
+			if (spirv_program.fragment_stage.has_uniform_blocks[0]) |uniform_block| uniform_block.size() else 0,
+		);
+
+		errdefer {
+			coral.heap.allocator.free(properties);
+			sokol.gfx.destroyPipeline(pipeline);
+			sokol.gfx.destroyShader(shader);
+		}
+
+		return .{
+			.shader = shader,
+			.pipeline = pipeline,
+			.properties = properties,
+		};
+	}
+
+	fn stage_desc(spirv_stage: spirv.Stage) sokol.gfx.ShaderStageDesc {
+		var stage = sokol.gfx.ShaderStageDesc{
+			.entry = spirv_stage.entry_point,
+			.source = spirv_stage.source,
+		};
+
+		for (0 .. spirv.Stage.max_uniform_blocks) |slot| {
+			const uniform_block = &(spirv_stage.has_uniform_blocks[slot] orelse {
+				continue;
+			});
+
+			const stage_uniform_block = &stage.uniform_blocks[slot];
+
+			stage_uniform_block.layout = switch (uniform_block.layout) {
+				.std140 => .STD140,
+			};
+
+			stage_uniform_block.size = uniform_block.size();
+
+			for (stage_uniform_block.uniforms[0 .. uniform_block.uniforms.len], uniform_block.uniforms) |*stage_uniform, uniform| {
+				stage_uniform.* = .{
+					.type = switch (uniform.type) {
+						.float => .FLOAT,
+						.float2 => .FLOAT2,
+						.float3 => .FLOAT3,
+						.float4 => .FLOAT4,
+						.integer => .INT,
+						.integer2 => .INT2,
+						.integer3 => .INT3,
+						.integer4 => .INT4,
+						.matrix4 => .MAT4,
+					},
+
+					.name = uniform.name,
+					.array_count = uniform.len,
+				};
+			}
+		}
+
+		for (0 .. spirv.Stage.max_images) |slot| {
+			const image = &(spirv_stage.has_images[slot] orelse {
+				continue;
+			});
+
+			stage.images[slot] = .{
+				.multisampled = image.is_multisampled,
+				.image_type = ._2D,
+				.sample_type = .FLOAT,
+				.used = true,
+			};
+		}
+
+		for (0 .. spirv.Stage.max_samplers) |slot| {
+			const sampler = &(spirv_stage.has_samplers[slot] orelse {
+				continue;
+			});
+
+			stage.samplers[slot] = .{
+				.sampler_type = switch (sampler.*) {
+					.filtering => .FILTERING,
+					.non_filtering => .NONFILTERING,
+					.comparison => .COMPARISON,
+				},
+
+				.used = true,
+			};
+		}
+
+		for (0 .. spirv.Stage.max_image_sampler_pairs) |slot| {
+			const image_sampler_pair = &(spirv_stage.has_image_sampler_pairs[slot] orelse {
+				continue;
+			});
+
+			stage.image_sampler_pairs[slot] = .{
+				.glsl_name = image_sampler_pair.name,
+				.image_slot = @intCast(image_sampler_pair.image_slot),
+				.sampler_slot = @intCast(image_sampler_pair.sampler_slot),
+				.used = true,
+			};
+		}
+
+		return stage;
+	}
+
+	const vertex_layout_state = sokol.gfx.VertexLayoutState{
+		.attrs = get: {
+			var attrs = [_]sokol.gfx.VertexAttrState{.{}} ** 16;
+
+			attrs[0] = .{
+				.format = .FLOAT2,
+				.buffer_index = 0,
+			};
+
+			attrs[1] = .{
+				.format = .FLOAT2,
+				.buffer_index = 0,
+			};
+
+			attrs[2] = .{
+				.format = .FLOAT2,
+				.buffer_index = 1,
+			};
+
+			attrs[3] = .{
+				.format = .FLOAT2,
+				.buffer_index = 1,
+			};
+
+			attrs[4] = .{
+				.format = .FLOAT2,
+				.buffer_index = 1,
+			};
+
+			attrs[5] = .{
+				.format = .UBYTE4N,
+				.buffer_index = 1,
+			};
+
+			attrs[6] = .{
+				.format = .FLOAT,
+				.buffer_index = 1,
+			};
+
+			attrs[7] = .{
+				.format = .FLOAT4,
+				.buffer_index = 1,
+			};
+
+			break: get attrs;
+		},
+
+		.buffers = get: {
+			var vertex_buffer_layouts = [_]sokol.gfx.VertexBufferLayoutState{.{}} ** 8;
+
+			vertex_buffer_layouts[1].step_func = .PER_INSTANCE;
+
+			break: get vertex_buffer_layouts;
+		},
+	};
+};
+
+const EffectPool = coral.Pool(Effect);
+
+const Self = @This();
+
+pub const Texture = struct {
+	width: u16,
+	height: u16,
+	access: Access,
+
+	pub const Access = union (enum) {
+		empty,
+		render: RenderAccess,
+		static: StaticAccess,
+	};
+
+	pub const RenderAccess = struct {
+		color_image: sokol.gfx.Image,
+		depth_image: sokol.gfx.Image,
+		attachments: sokol.gfx.Attachments,
+	};
+
+	pub const StaticAccess = struct {
+		image: sokol.gfx.Image,
+	};
+
+	pub fn deinit(self: *Texture) void {
+		switch (self.access) {
+			.render => |render| {
+				sokol.gfx.destroyImage(render.color_image);
+				sokol.gfx.destroyImage(render.depth_image);
+				sokol.gfx.destroyAttachments(render.attachments);
+			},
+
+			.static => |static| {
+				sokol.gfx.destroyImage(static.image);
+			},
+
+			.empty => {},
+		}
+
+		self.* = undefined;
+	}
+
+	pub fn init(desc: gfx.Texture.Desc) std.mem.Allocator.Error!Texture {
+		const pixel_format = switch (desc.format) {
+			.rgba8 => sokol.gfx.PixelFormat.RGBA8,
+			.bgra8 => sokol.gfx.PixelFormat.BGRA8,
+		};
+
+		switch (desc.access) {
+			.render => |render| {
+				if (render.width == 0 or render.height == 0) {
+					return .{
+						.width = render.width,
+						.height = render.height,
+						.access = .empty,
+					};
+				}
+
+				const color_image = sokol.gfx.makeImage(.{
+					.pixel_format = pixel_format,
+					.width = render.width,
+					.height = render.height,
+					.render_target = true,
+				});
+
+				const depth_image = sokol.gfx.makeImage(.{
+					.width = render.width,
+					.height = render.height,
+					.render_target = true,
+					.pixel_format = .DEPTH_STENCIL,
+				});
+
+				const attachments = sokol.gfx.makeAttachments(attachments_desc: {
+					var attachments_desc = sokol.gfx.AttachmentsDesc{
+						.depth_stencil = .{
+							.image = depth_image,
+						},
+					};
+
+					attachments_desc.colors[0] = .{
+						.image = color_image,
+					};
+
+					break: attachments_desc attachments_desc;
+				});
+
+				return .{
+					.width = render.width,
+					.height = render.height,
+
+					.access = .{
+						.render = .{
+							.attachments = attachments,
+							.color_image = color_image,
+							.depth_image = depth_image,
+						},
+					},
+				};
+			},
+
+			.static => |static| {
+				const height = std.math.cast(u16, static.data.len / (static.width * desc.format.byte_size())) orelse {
+					return error.OutOfMemory;
+				};
+
+				if (static.width == 0 or height == 0) {
+					return .{
+						.width = static.width,
+						.height = height,
+						.access = .empty,
+					};
+				}
+
+				const image = sokol.gfx.makeImage(image_desc: {
+					var image_desc = sokol.gfx.ImageDesc{
+						.height = height,
+						.pixel_format = pixel_format,
+						.width = static.width,
+					};
+
+					image_desc.data.subimage[0][0] = sokol.gfx.asRange(static.data);
+
+					break: image_desc image_desc;
+				});
+
+				errdefer {
+					sokol.gfx.destroyImage(image);
+				}
+
+				return .{
+					.width = static.width,
+					.height = height,
+
+					.access = .{
+						.static = .{
+							.image = image,
+						},
+					},
+				};
+			},
+		}
+	}
+};
+
+const TexturePool = coral.Pool(Texture);
+
+pub fn create_effect(self: *Self, desc: gfx.Effect.Desc) !gfx.Effect {
+	var effect = try Effect.init(desc);
+
+	errdefer effect.deinit();
+
+	return @enumFromInt(try self.effects.insert(effect));
+}
+
+pub fn create_texture(self: *Self, desc: gfx.Texture.Desc) !gfx.Texture {
+	var texture = try Texture.init(desc);
+
+	errdefer texture.deinit();
+
+	return @enumFromInt(try self.textures.insert(texture));
+}
+
+pub fn deinit(self: *Self) void {
+	var textures = self.textures.values();
+
+	while (textures.next()) |texture| {
+		texture.deinit();
+	}
+
+	self.textures.deinit();
+
+	var effects = self.effects.values();
+
+	while (effects.next()) |effect| {
+		effect.deinit();
+	}
+
+	self.effects.deinit();
+
+	self.* = undefined;
+}
+
+pub fn destroy_effect(self: *Self, handle: gfx.Effect) bool {
+	switch (handle) {
+		.default => {},
+
+		else => {
+			var effect = self.effects.remove(@intFromEnum(handle)) orelse {
+				return false;
+			};
+
+			effect.deinit();
+		},
+	}
+
+	return true;
+}
+
+pub fn destroy_texture(self: *Self, handle: gfx.Texture) bool {
+	switch (handle) {
+		.default => {},
+
+		else => {
+			var texture = self.textures.remove(@intFromEnum(handle)) orelse {
+				return false;
+			};
+
+			texture.deinit();
+		},
+	}
+
+	return true;
+}
+
+pub fn get_effect(self: *Self, handle: gfx.Effect) ?*Effect {
+	return self.effects.get(@intFromEnum(handle));
+}
+
+pub fn get_texture(self: *Self, handle: gfx.Texture) ?*Texture {
+	return self.textures.get(@intFromEnum(handle));
+}
+
+pub fn init() !Self {
+	var pools = Self{
+		.effects = EffectPool.init(coral.heap.allocator),
+		.textures = TexturePool.init(coral.heap.allocator),
+	};
+
+	errdefer {
+		pools.deinit();
+	}
+
+	const assert = struct {
+		fn is_handle(expected: anytype, actual: @TypeOf(expected)) void {
+			std.debug.assert(actual == expected);
+		}
+	};
+
+	assert.is_handle(gfx.Effect.default, try pools.create_effect(.{
+		.fragment_spirv_ops = &spirv.to_ops(@embedFile("./shaders/2d_default.frag.spv")),
+	}));
+
+	assert.is_handle(gfx.Texture.default, try pools.create_texture(.{
+		.format = .rgba8,
+
+		.access = .{
+			.static = .{
+				.data = std.mem.asBytes(&[_]u32{
+					0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080,
+					0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000,
+					0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080,
+					0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000,
+					0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080,
+					0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000,
+					0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080,
+					0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000,
+				}),
+
+				.width = 8,
+			},
+		},
+	}));
+
+	assert.is_handle(gfx.Texture.backbuffer, try pools.create_texture(.{
+		.format = .rgba8,
+
+		.access = .{
+			.render = .{
+				.width = 0,
+				.height = 0,
+			},
+		}
+	}));
+
+	return pools;
+}

src/ona/gfx/bmp.zig

@@ -1,79 +0,0 @@
-const coral = @import("coral");
-
-const gfx = @import("../gfx.zig");
-
-const std = @import("std");
-
-pub fn load_file(arena: *std.heap.ArenaAllocator, storage: coral.files.Storage, path: []const u8) !gfx.Texture.Desc {
-	const header = try storage.read_little(path, 0, extern struct {
-		type: [2]u8 align (1),
-		file_size: u32 align (1),
-		reserved: [2]u16 align (1),
-		image_offset: u32 align (1),
-		header_size: u32 align (1),
-		pixel_width: i32 align (1),
-		pixel_height: i32 align (1),
-		color_planes: u16 align (1),
-		bits_per_pixel: u16 align (1),
-		compression_method: u32 align (1),
-		image_size: u32 align(1),
-		pixels_per_meter_x: i32 align (1),
-		pixels_per_meter_y: i32 align (1),
-		palette_colors_used: u32 align (1),
-		important_colors_used: u32 align (1),
-	}) orelse {
-		return error.FormatUnsupported;
-	};
-
-	if (!std.mem.eql(u8, &header.type, "BM")) {
-		return error.FormatUnsupported;
-	}
-
-	const pixel_width = std.math.cast(u16, header.pixel_width) orelse {
-		return error.FormatUnsupported;
-	};
-
-	const pixels = try arena.allocator().alloc(coral.io.Byte, header.image_size);
-	const bytes_per_pixel = header.bits_per_pixel / coral.io.bits_per_byte;
-	const alignment = 4;
-	const byte_stride = pixel_width * bytes_per_pixel;
-	const padded_byte_stride = alignment * @divTrunc((byte_stride + alignment - 1), alignment);
-	const byte_padding = coral.scalars.sub(padded_byte_stride, byte_stride) orelse 0;
-	var buffer_offset: usize = 0;
-	var file_offset = @as(usize, header.image_offset);
-
-	switch (header.bits_per_pixel) {
-		32 => {
-			while (buffer_offset < pixels.len) {
-				const line = pixels[buffer_offset .. buffer_offset + byte_stride];
-
-				if (try storage.read(path, line, file_offset) != byte_stride) {
-					return error.FormatUnsupported;
-				}
-
-				for (0 .. pixel_width) |i| {
-					const line_offset = i * 4;
-					const pixel = line[line_offset .. line_offset + 4];
-
-					std.mem.swap(u8, &pixel[0], &pixel[2]);
-				}
-
-				file_offset += line.len + byte_padding;
-				buffer_offset += padded_byte_stride;
-			}
-		},
-
-		else => return error.FormatUnsupported,
-	}
-
-	return .{
-		.format = .rgba8,
-
-		.access = .{
-			.static = .{
-				.width = pixel_width,
-				.data = pixels,
-			},
-		},
-	};
-}

src/ona/gfx/rendering.zig

@@ -0,0 +1,428 @@
+const Resources = @import("./Resources.zig");
+
+const coral = @import("coral");
+
+const ext = @import("../ext.zig");
+
+const gfx = @import("../gfx.zig");
+
+const spirv = @import("./spirv.zig");
+
+const sokol = @import("sokol");
+
+const std = @import("std");
+
+const Frame = struct {
+	texture_batch_buffers: coral.stack.Sequential(sokol.gfx.Buffer),
+	quad_index_buffer: sokol.gfx.Buffer,
+	quad_vertex_buffer: sokol.gfx.Buffer,
+	drawn_count: usize = 0,
+	flushed_count: usize = 0,
+	current_source_texture: gfx.Texture = .default,
+	current_target_texture: gfx.Texture = .backbuffer,
+	current_effect: gfx.Effect = .default,
+
+	const DrawTexture = extern struct {
+		transform: gfx.Transform2D,
+		tint: @Vector(4, u8) = @splat(std.math.maxInt(u8)),
+		depth: f32 = 0,
+		texture_offset: @Vector(2, f32) = @splat(0),
+		texture_size: @Vector(2, f32) = @splat(1),
+	};
+
+	const batches_per_buffer = 512;
+
+	pub fn deinit(self: *Frame) void {
+		for (self.texture_batch_buffers.values) |buffer| {
+			sokol.gfx.destroyBuffer(buffer);
+		}
+
+		self.texture_batch_buffers.deinit();
+
+		self.* = undefined;
+	}
+
+	pub fn init() !Frame {
+		const Vertex = struct {
+			xy: @Vector(2, f32),
+			uv: @Vector(2, f32),
+		};
+
+		const quad_index_buffer = sokol.gfx.makeBuffer(.{
+			.data = sokol.gfx.asRange(&[_]u16{0, 1, 2, 0, 2, 3}),
+			.type = .INDEXBUFFER,
+		});
+
+		const quad_vertex_buffer = sokol.gfx.makeBuffer(.{
+			.data = sokol.gfx.asRange(&[_]Vertex{
+				.{.xy = .{-0.5, -0.5}, .uv = .{0, 1}},
+				.{.xy = .{0.5, -0.5}, .uv = .{1, 1}},
+				.{.xy = .{0.5, 0.5}, .uv = .{1, 0}},
+				.{.xy = .{-0.5, 0.5},  .uv = .{0, 0}},
+			}),
+
+			.type = .VERTEXBUFFER,
+		});
+
+		return .{
+			.texture_batch_buffers = .{.allocator = coral.heap.allocator},
+			.quad_index_buffer = quad_index_buffer,
+			.quad_vertex_buffer = quad_vertex_buffer,
+		};
+	}
+
+	pub fn draw_texture(self: *Frame, pools: *Resources, command: gfx.Commands.DrawTextureCommand) !void {
+		if (command.texture != self.current_source_texture) {
+			self.flush(pools);
+		}
+
+		self.current_source_texture = command.texture;
+
+		const has_filled_current_buffer = (self.drawn_count % batches_per_buffer) == 0;
+		const buffer_count = self.drawn_count / batches_per_buffer;
+
+		if (has_filled_current_buffer and buffer_count == self.texture_batch_buffers.len()) {
+			const instance_buffer = sokol.gfx.makeBuffer(.{
+				.size = @sizeOf(DrawTexture) * batches_per_buffer,
+				.usage = .STREAM,
+			});
+
+			errdefer sokol.gfx.destroyBuffer(instance_buffer);
+
+			try self.texture_batch_buffers.push_grow(instance_buffer);
+		}
+
+		_ = sokol.gfx.appendBuffer(self.texture_batch_buffers.get().?, sokol.gfx.asRange(&DrawTexture{
+			.transform = command.transform,
+		}));
+
+		self.drawn_count += 1;
+	}
+
+	pub fn finish(self: *Frame, pools: *Resources) void {
+		self.flush(pools);
+
+		self.drawn_count = 0;
+		self.flushed_count = 0;
+		self.current_source_texture = .default;
+		self.current_target_texture = .backbuffer;
+		self.current_effect = .default;
+	}
+
+	pub fn flush(self: *Frame, pools: *Resources) void {
+		if (self.flushed_count == self.drawn_count) {
+			return;
+		}
+
+		var bindings = sokol.gfx.Bindings{
+			.index_buffer = self.quad_index_buffer,
+		};
+
+		bindings.vertex_buffers[vertex_indices.mesh] = self.quad_vertex_buffer;
+
+		switch (pools.get_texture(self.current_source_texture).?.access) {
+			.render => |render| {
+				bindings.fs.images[0] = render.color_image;
+				bindings.fs.samplers[0] = default_sampler;
+			},
+
+			.static => |static| {
+				bindings.fs.images[0] = static.image;
+				bindings.fs.samplers[0] = default_sampler;
+			},
+
+			.empty => {
+				@panic("Cannot render empty textures");
+			},
+		}
+
+		const effect = pools.get_effect(self.current_effect).?;
+
+		sokol.gfx.applyPipeline(effect.pipeline);
+
+		const texture = pools.get_texture(self.current_target_texture).?;
+
+		sokol.gfx.applyUniforms(.VS, 0, sokol.gfx.asRange(&coral.lina.orthographic_projection(-1.0, 1.0, .{
+			.left = 0,
+			.top = 0,
+			.right = @floatFromInt(texture.width),
+			.bottom = @floatFromInt(texture.height),
+		})));
+
+		if (effect.properties.len != 0) {
+			sokol.gfx.applyUniforms(.FS, 0, sokol.gfx.asRange(effect.properties));
+		}
+
+		while (true) {
+			const buffer_index = self.flushed_count / batches_per_buffer;
+			const buffer_offset = self.flushed_count % batches_per_buffer;
+			const instances_to_flush = @min(batches_per_buffer - buffer_offset, self.drawn_count - self.flushed_count);
+
+			self.flushed_count += instances_to_flush;
+			bindings.vertex_buffers[vertex_indices.instance] = self.texture_batch_buffers.values[buffer_index];
+			bindings.vertex_buffer_offsets[vertex_indices.instance] = @intCast(@sizeOf(DrawTexture) * buffer_offset);
+
+			sokol.gfx.applyBindings(bindings);
+			sokol.gfx.draw(0, 6, @intCast(instances_to_flush));
+
+			if (self.flushed_count == self.drawn_count) {
+				break;
+			}
+		}
+	}
+
+	pub fn set_effect(self: *Frame, pools: *Resources, command: gfx.Commands.SetEffectCommand) void {
+		if (command.effect != self.current_effect) {
+			self.flush(pools);
+		}
+
+		self.current_effect = command.effect;
+
+		if (pools.get_effect(self.current_effect)) |effect| {
+			@memcpy(effect.properties, command.properties);
+		}
+	}
+
+	pub fn set_target(self: *Frame, pools: *Resources, command: gfx.Commands.SetTargetCommand) void {
+		sokol.gfx.endPass();
+
+		var pass = sokol.gfx.Pass{
+			.action = .{
+				.stencil = .{
+					.load_action = .CLEAR,
+				},
+			},
+		};
+
+		if (command.clear_color) |color| {
+			pass.action.colors[0] = .{
+				.load_action = .CLEAR,
+				.clear_value = @bitCast(color),
+			};
+		} else {
+			pass.action.colors[0] = .{.load_action = .LOAD};
+		}
+
+		if (command.clear_depth) |depth| {
+			pass.action.depth = .{
+				.load_action = .CLEAR,
+				.clear_value = depth,
+			};
+		} else {
+			pass.action.depth = .{.load_action = .LOAD};
+		}
+
+		pass.attachments = switch (pools.get_texture(self.current_target_texture).?.access) {
+			.static => @panic("Cannot render to static textures"),
+			.empty => @panic("Cannot render to empty textures"),
+			.render => |render| render.attachments,
+		};
+
+		self.current_target_texture = command.texture;
+
+		sokol.gfx.beginPass(pass);
+	}
+};
+
+var default_sampler: sokol.gfx.Sampler = undefined;
+
+const vertex_indices = .{
+	.mesh = 0,
+	.instance = 1,
+};
+
+pub fn process_work(pending_work: *gfx.Assets.WorkQueue, window: *ext.SDL_Window) !void {
+	const context = configure_and_create: {
+		var result = @as(c_int, 0);
+
+		result |= ext.SDL_GL_SetAttribute(ext.SDL_GL_CONTEXT_FLAGS, ext.SDL_GL_CONTEXT_FORWARD_COMPATIBLE_FLAG);
+		result |= ext.SDL_GL_SetAttribute(ext.SDL_GL_CONTEXT_PROFILE_MASK, ext.SDL_GL_CONTEXT_PROFILE_CORE);
+		result |= ext.SDL_GL_SetAttribute(ext.SDL_GL_CONTEXT_MAJOR_VERSION, 3);
+		result |= ext.SDL_GL_SetAttribute(ext.SDL_GL_CONTEXT_MINOR_VERSION, 3);
+		result |= ext.SDL_GL_SetAttribute(ext.SDL_GL_DOUBLEBUFFER, 1);
+
+		if (result != 0) {
+			return error.Unsupported;
+		}
+
+		break: configure_and_create ext.SDL_GL_CreateContext(window);
+	};
+
+	defer ext.SDL_GL_DeleteContext(context);
+
+	sokol.gfx.setup(.{
+		.environment = .{
+			.defaults = .{
+				.color_format = .RGBA8,
+				.depth_format = .DEPTH_STENCIL,
+				.sample_count = 1,
+			},
+		},
+
+		.logger = .{
+			.func = sokol.log.func,
+		},
+	});
+
+	defer {
+		sokol.gfx.shutdown();
+	}
+
+	var resources = try Resources.init();
+
+	defer {
+		resources.deinit();
+	}
+
+	var frame = try Frame.init();
+
+	defer {
+		frame.deinit();
+	}
+
+	default_sampler = sokol.gfx.makeSampler(.{});
+
+	while (true) {
+		switch (pending_work.dequeue()) {
+			.load_effect => |load| {
+				const effect = try resources.create_effect(load.desc);
+
+				if (!load.loaded.resolve(effect)) {
+					std.debug.assert(resources.destroy_effect(effect));
+				}
+			},
+
+			.load_texture => |load| {
+				const texture = try resources.create_texture(load.desc);
+
+				if (!load.loaded.resolve(texture)) {
+					std.debug.assert(resources.destroy_texture(texture));
+				}
+			},
+
+			.render_frame => |render_frame| {
+				const backbuffer = resources.get_texture(.backbuffer).?;
+
+				if (backbuffer.width != render_frame.width or backbuffer.height != render_frame.height) {
+					backbuffer.deinit();
+
+					backbuffer.* = try Resources.Texture.init(.{
+						.format = .rgba8,
+
+						.access = .{
+							.render = .{
+								.width = render_frame.width,
+								.height = render_frame.height,
+							},
+						},
+					});
+				}
+
+				sokol.gfx.beginPass(pass: {
+					var pass = sokol.gfx.Pass{
+						.action = .{
+							.stencil = .{
+								.load_action = .CLEAR,
+							},
+
+							.depth = .{
+								.load_action = .CLEAR,
+								.clear_value = 0,
+							}
+						},
+					};
+
+					pass.action.colors[0] = .{
+						.load_action = .CLEAR,
+						.clear_value = @bitCast(render_frame.clear_color),
+					};
+
+					pass.attachments = resources.get_texture(.backbuffer).?.access.render.attachments;
+
+					break: pass pass;
+				});
+
+				var has_command_params = render_frame.has_command_params;
+
+				while (has_command_params) |command_params| : (has_command_params = command_params.has_next) {
+					for (command_params.param.submitted_commands()) |command| {
+						try switch (command) {
+							.draw_texture => |draw_texture| frame.draw_texture(&resources, draw_texture),
+							.set_effect => |set_effect| frame.set_effect(&resources, set_effect),
+							.set_target => |set_target| frame.set_target(&resources, set_target),
+						};
+					}
+
+					frame.flush(&resources);
+
+					if (frame.current_target_texture != .backbuffer) {
+						frame.set_target(&resources, .{
+							.texture = .backbuffer,
+							.clear_color = null,
+							.clear_depth = null,
+							.clear_stencil = null,
+						});
+					}
+				}
+
+				sokol.gfx.endPass();
+
+				sokol.gfx.beginPass(swapchain_pass: {
+					var pass = sokol.gfx.Pass{
+						.swapchain = .{
+							.width = render_frame.width,
+							.height = render_frame.height,
+							.sample_count = 1,
+							.color_format = .RGBA8,
+							.depth_format = .DEPTH_STENCIL,
+							.gl = .{.framebuffer = 0},
+						},
+
+						.action = .{
+							.stencil = .{.load_action = .CLEAR},
+							.depth = .{.load_action = .CLEAR},
+						},
+					};
+
+					pass.action.colors[0] = .{.load_action = .CLEAR};
+
+					break: swapchain_pass pass;
+				});
+
+				try frame.draw_texture(&resources, .{
+					.texture = .backbuffer,
+
+					.transform = .{
+						.origin = .{@as(f32, @floatFromInt(render_frame.width)) / 2, @as(f32, @floatFromInt(render_frame.height)) / 2},
+						.xbasis = .{@floatFromInt(render_frame.width), 0},
+						.ybasis = .{0, @floatFromInt(render_frame.height)},
+					},
+				});
+
+				frame.finish(&resources);
+				sokol.gfx.endPass();
+				sokol.gfx.commit();
+				ext.SDL_GL_SwapWindow(window);
+				render_frame.finished.set();
+			},
+
+			.shutdown => {
+				break;
+			},
+
+			.unload_effect => |unload| {
+				if (!resources.destroy_effect(unload.handle)) {
+					@panic("Attempt to unload a non-existent effect");
+				}
+			},
+
+			.unload_texture => |unload| {
+				if (!resources.destroy_texture(unload.handle)) {
+					@panic("Attempt to unload a non-existent texture");
+				}
+			},
+		}
+	}
+}
+
+var work_thread: std.Thread = undefined;

src/ona/gfx/sokol.zig

@@ -1,908 +0,0 @@
-const coral = @import("coral");
-
-const ext = @import("../ext.zig");
-
-const gfx = @import("../gfx.zig");
-
-const spirv = @import("./spirv.zig");
-
-const sokol = @import("sokol");
-
-const std = @import("std");
-
-const Frame = struct {
-	swapchain: sokol.gfx.Swapchain,
-	drawn_count: usize = 0,
-	flushed_count: usize = 0,
-	current_source_texture: gfx.Texture = .default,
-	current_target_texture: gfx.Texture = .backbuffer,
-	current_effect: gfx.Effect = .default,
-
-	const DrawTexture = extern struct {
-		transform: gfx.Transform2D,
-		tint: @Vector(4, u8) = @splat(std.math.maxInt(u8)),
-		depth: f32 = 0,
-		texture_offset: @Vector(2, f32) = @splat(0),
-		texture_size: @Vector(2, f32) = @splat(1),
-	};
-
-	pub fn draw_texture(self: *Frame, pools: *Resources, command: gfx.Commands.DrawTextureCommand) !void {
-		if (command.texture != self.current_source_texture) {
-			self.flush(pools);
-		}
-
-		self.current_source_texture = command.texture;
-
-		const has_filled_current_buffer = (self.drawn_count % batches_per_buffer) == 0;
-		const buffer_count = self.drawn_count / batches_per_buffer;
-
-		if (has_filled_current_buffer and buffer_count == texture_batch_buffers.len()) {
-			const instance_buffer = sokol.gfx.makeBuffer(.{
-				.size = @sizeOf(DrawTexture) * batches_per_buffer,
-				.usage = .STREAM,
-			});
-
-			errdefer sokol.gfx.destroyBuffer(instance_buffer);
-
-			try texture_batch_buffers.push_grow(instance_buffer);
-		}
-
-		_ = sokol.gfx.appendBuffer(texture_batch_buffers.get().?, sokol.gfx.asRange(&DrawTexture{
-			.transform = command.transform,
-		}));
-
-		self.drawn_count += 1;
-	}
-
-	pub fn flush(self: *Frame, pools: *Resources) void {
-		if (self.flushed_count == self.drawn_count) {
-			return;
-		}
-
-		var bindings = sokol.gfx.Bindings{
-			.index_buffer = quad_index_buffer,
-		};
-
-		bindings.vertex_buffers[vertex_indices.mesh] = quad_vertex_buffer;
-
-		switch (pools.get_texture(self.current_source_texture).?.access) {
-			.render => |render| {
-				bindings.fs.images[0] = render.color_image;
-				bindings.fs.samplers[0] = default_sampler;
-			},
-
-			.static => |static| {
-				bindings.fs.images[0] = static.image;
-				bindings.fs.samplers[0] = default_sampler;
-			},
-
-			.empty => {
-				@panic("Cannot render empty textures");
-			},
-		}
-
-		const effect = pools.get_effect(self.current_effect).?;
-
-		sokol.gfx.applyPipeline(effect.pipeline);
-
-		const texture = pools.get_texture(self.current_target_texture).?;
-
-		sokol.gfx.applyUniforms(.VS, 0, sokol.gfx.asRange(&coral.lina.orthographic_projection(-1.0, 1.0, .{
-			.left = 0,
-			.top = 0,
-			.right = @floatFromInt(texture.width),
-			.bottom = @floatFromInt(texture.height),
-		})));
-
-		if (effect.properties.len != 0) {
-			sokol.gfx.applyUniforms(.FS, 0, sokol.gfx.asRange(effect.properties));
-		}
-
-		while (true) {
-			const buffer_index = self.flushed_count / batches_per_buffer;
-			const buffer_offset = self.flushed_count % batches_per_buffer;
-			const instances_to_flush = @min(batches_per_buffer - buffer_offset, self.drawn_count - self.flushed_count);
-
-			self.flushed_count += instances_to_flush;
-			bindings.vertex_buffers[vertex_indices.instance] = texture_batch_buffers.values[buffer_index];
-			bindings.vertex_buffer_offsets[vertex_indices.instance] = @intCast(@sizeOf(DrawTexture) * buffer_offset);
-
-			sokol.gfx.applyBindings(bindings);
-			sokol.gfx.draw(0, 6, @intCast(instances_to_flush));
-
-			if (self.flushed_count == self.drawn_count) {
-				break;
-			}
-		}
-	}
-
-	pub fn set_effect(self: *Frame, pools: *Resources, command: gfx.Commands.SetEffectCommand) void {
-		if (command.effect != self.current_effect) {
-			self.flush(pools);
-		}
-
-		self.current_effect = command.effect;
-
-		if (pools.get_effect(self.current_effect)) |effect| {
-			@memcpy(effect.properties, command.properties);
-		}
-	}
-
-	pub fn set_target(self: *Frame, pools: *Resources, command: gfx.Commands.SetTargetCommand) void {
-		sokol.gfx.endPass();
-
-		var pass = sokol.gfx.Pass{
-			.action = .{
-				.stencil = .{
-					.load_action = .CLEAR,
-				},
-			},
-		};
-
-		if (command.clear_color) |color| {
-			pass.action.colors[0] = .{
-				.load_action = .CLEAR,
-				.clear_value = @bitCast(color),
-			};
-		} else {
-			pass.action.colors[0] = .{.load_action = .LOAD};
-		}
-
-		if (command.clear_depth) |depth| {
-			pass.action.depth = .{
-				.load_action = .CLEAR,
-				.clear_value = depth,
-			};
-		} else {
-			pass.action.depth = .{.load_action = .LOAD};
-		}
-
-		pass.attachments = switch (pools.get_texture(self.current_target_texture).?.access) {
-			.static => @panic("Cannot render to static textures"),
-			.empty => @panic("Cannot render to empty textures"),
-			.render => |render| render.attachments,
-		};
-
-		self.current_target_texture = command.texture;
-
-		sokol.gfx.beginPass(pass);
-	}
-
-	const storage_bindings = .{
-		.engine = 0,
-		.material = 1,
-	};
-
-	var texture_batch_buffers = coral.stack.Sequential(sokol.gfx.Buffer){.allocator = coral.heap.allocator};
-
-	const batches_per_buffer = 512;
-};
-
-const Resources = struct {
-	effects: EffectPool,
-	textures: TexturePool,
-
-	pub const Effect = struct {
-		shader: sokol.gfx.Shader,
-		pipeline: sokol.gfx.Pipeline,
-		properties: []coral.io.Byte,
-
-		pub fn deinit(self: *Effect) void {
-			coral.heap.allocator.free(self.properties);
-			sokol.gfx.destroyPipeline(self.pipeline);
-			sokol.gfx.destroyShader(self.shader);
-
-			self.* = undefined;
-		}
-
-		pub fn init(desc: gfx.Effect.Desc) spirv.Error!Effect {
-			var spirv_arena = std.heap.ArenaAllocator.init(coral.heap.allocator);
-
-			defer {
-				spirv_arena.deinit();
-			}
-
-			const spirv_program = try spirv.analyze(&spirv_arena, .{
-				.target = try switch (sokol.gfx.queryBackend()) {
-					.GLCORE => spirv.Target.glsl,
-					else => error.InvalidSPIRV,
-				},
-
-				.vertex_source = .{
-					.ops = &spirv.to_ops(@embedFile("./shaders/2d_default.vert.spv")),
-				},
-
-				.fragment_source = .{
-					.ops = desc.fragment_spirv_ops,
-				},
-			});
-
-			const shader = sokol.gfx.makeShader(shader_desc: {
-				const shader_desc = sokol.gfx.ShaderDesc{
-					.vs = stage_desc(spirv_program.vertex_stage),
-					.fs = stage_desc(spirv_program.fragment_stage),
-				};
-
-				// TODO: Vertex attributes, for some reason they aren't needed?
-
-				break: shader_desc shader_desc;
-			});
-
-			// TODO: Review blending rules.
-			const pipeline = sokol.gfx.makePipeline(pipeline_desc: {
-				var pipeline_desc = sokol.gfx.PipelineDesc{
-					.label = "Effect pipeline",
-					.layout = vertex_layout_state,
-					.shader = shader,
-					.index_type = .UINT16,
-					.blend_color = .{.r = 1.0, .g = 1.0, .b = 1.0, .a = 1.0},
-				};
-
-				pipeline_desc.colors[0] = .{
-					.write_mask = .RGBA,
-
-					.blend = .{
-						.enabled = true,
-						.src_factor_rgb = .SRC_ALPHA,
-						.dst_factor_rgb = .ONE_MINUS_SRC_ALPHA,
-					},
-				};
-
-				break: pipeline_desc pipeline_desc;
-			});
-
-			const properties = try coral.heap.allocator.alloc(
-				coral.io.Byte,
-				if (spirv_program.fragment_stage.has_uniform_blocks[0]) |uniform_block| uniform_block.size() else 0,
-			);
-
-			errdefer {
-				coral.heap.allocator.free(properties);
-				sokol.gfx.destroyPipeline(pipeline);
-				sokol.gfx.destroyShader(shader);
-			}
-
-			return .{
-				.shader = shader,
-				.pipeline = pipeline,
-				.properties = properties,
-			};
-		}
-
-		fn stage_desc(spirv_stage: spirv.Stage) sokol.gfx.ShaderStageDesc {
-			var stage = sokol.gfx.ShaderStageDesc{
-				.entry = spirv_stage.entry_point,
-				.source = spirv_stage.source,
-			};
-
-			for (0 .. spirv.Stage.max_uniform_blocks) |slot| {
-				const uniform_block = &(spirv_stage.has_uniform_blocks[slot] orelse {
-					continue;
-				});
-
-				const stage_uniform_block = &stage.uniform_blocks[slot];
-
-				stage_uniform_block.layout = switch (uniform_block.layout) {
-					.std140 => .STD140,
-				};
-
-				stage_uniform_block.size = uniform_block.size();
-
-				for (stage_uniform_block.uniforms[0 .. uniform_block.uniforms.len], uniform_block.uniforms) |*stage_uniform, uniform| {
-					stage_uniform.* = .{
-						.type = switch (uniform.type) {
-							.float => .FLOAT,
-							.float2 => .FLOAT2,
-							.float3 => .FLOAT3,
-							.float4 => .FLOAT4,
-							.integer => .INT,
-							.integer2 => .INT2,
-							.integer3 => .INT3,
-							.integer4 => .INT4,
-							.matrix4 => .MAT4,
-						},
-
-						.name = uniform.name,
-						.array_count = uniform.len,
-					};
-				}
-			}
-
-			for (0 .. spirv.Stage.max_images) |slot| {
-				const image = &(spirv_stage.has_images[slot] orelse {
-					continue;
-				});
-
-				stage.images[slot] = .{
-					.multisampled = image.is_multisampled,
-					.image_type = ._2D,
-					.sample_type = .FLOAT,
-					.used = true,
-				};
-			}
-
-			for (0 .. spirv.Stage.max_samplers) |slot| {
-				const sampler = &(spirv_stage.has_samplers[slot] orelse {
-					continue;
-				});
-
-				stage.samplers[slot] = .{
-					.sampler_type = switch (sampler.*) {
-						.filtering => .FILTERING,
-						.non_filtering => .NONFILTERING,
-						.comparison => .COMPARISON,
-					},
-
-					.used = true,
-				};
-			}
-
-			for (0 .. spirv.Stage.max_image_sampler_pairs) |slot| {
-				const image_sampler_pair = &(spirv_stage.has_image_sampler_pairs[slot] orelse {
-					continue;
-				});
-
-				stage.image_sampler_pairs[slot] = .{
-					.glsl_name = image_sampler_pair.name,
-					.image_slot = @intCast(image_sampler_pair.image_slot),
-					.sampler_slot = @intCast(image_sampler_pair.sampler_slot),
-					.used = true,
-				};
-			}
-
-			return stage;
-		}
-
-		const vertex_layout_state = sokol.gfx.VertexLayoutState{
-			.attrs = get: {
-				var attrs = [_]sokol.gfx.VertexAttrState{.{}} ** 16;
-
-				attrs[0] = .{
-					.format = .FLOAT2,
-					.buffer_index = 0,
-				};
-
-				attrs[1] = .{
-					.format = .FLOAT2,
-					.buffer_index = 0,
-				};
-
-				attrs[2] = .{
-					.format = .FLOAT2,
-					.buffer_index = 1,
-				};
-
-				attrs[3] = .{
-					.format = .FLOAT2,
-					.buffer_index = 1,
-				};
-
-				attrs[4] = .{
-					.format = .FLOAT2,
-					.buffer_index = 1,
-				};
-
-				attrs[5] = .{
-					.format = .UBYTE4N,
-					.buffer_index = 1,
-				};
-
-				attrs[6] = .{
-					.format = .FLOAT,
-					.buffer_index = 1,
-				};
-
-				attrs[7] = .{
-					.format = .FLOAT4,
-					.buffer_index = 1,
-				};
-
-				break: get attrs;
-			},
-
-			.buffers = get: {
-				var vertex_buffer_layouts = [_]sokol.gfx.VertexBufferLayoutState{.{}} ** 8;
-
-				vertex_buffer_layouts[1].step_func = .PER_INSTANCE;
-
-				break: get vertex_buffer_layouts;
-			},
-		};
-	};
-
-	pub const Texture = struct {
-		width: u16,
-		height: u16,
-		access: Access,
-
-		pub const Access = union (enum) {
-			empty,
-			render: RenderAccess,
-			static: StaticAccess,
-		};
-
-		pub const RenderAccess = struct {
-			color_image: sokol.gfx.Image,
-			depth_image: sokol.gfx.Image,
-			attachments: sokol.gfx.Attachments,
-		};
-
-		pub const StaticAccess = struct {
-			image: sokol.gfx.Image,
-		};
-
-		pub fn deinit(self: *Texture) void {
-			switch (self.access) {
-				.render => |render| {
-					sokol.gfx.destroyImage(render.color_image);
-					sokol.gfx.destroyImage(render.depth_image);
-					sokol.gfx.destroyAttachments(render.attachments);
-				},
-
-				.static => |static| {
-					sokol.gfx.destroyImage(static.image);
-				},
-
-				.empty => {},
-			}
-
-			self.* = undefined;
-		}
-
-		pub fn init(desc: gfx.Texture.Desc) std.mem.Allocator.Error!Texture {
-			const pixel_format = switch (desc.format) {
-				.rgba8 => sokol.gfx.PixelFormat.RGBA8,
-				.bgra8 => sokol.gfx.PixelFormat.BGRA8,
-			};
-
-			switch (desc.access) {
-				.render => |render| {
-					if (render.width == 0 or render.height == 0) {
-						return .{
-							.width = render.width,
-							.height = render.height,
-							.access = .empty,
-						};
-					}
-
-					const color_image = sokol.gfx.makeImage(.{
-						.pixel_format = pixel_format,
-						.width = render.width,
-						.height = render.height,
-						.render_target = true,
-					});
-
-					const depth_image = sokol.gfx.makeImage(.{
-						.width = render.width,
-						.height = render.height,
-						.render_target = true,
-						.pixel_format = .DEPTH_STENCIL,
-					});
-
-					const attachments = sokol.gfx.makeAttachments(attachments_desc: {
-						var attachments_desc = sokol.gfx.AttachmentsDesc{
-							.depth_stencil = .{
-								.image = depth_image,
-							},
-						};
-
-						attachments_desc.colors[0] = .{
-							.image = color_image,
-						};
-
-						break: attachments_desc attachments_desc;
-					});
-
-					return .{
-						.width = render.width,
-						.height = render.height,
-
-						.access = .{
-							.render = .{
-								.attachments = attachments,
-								.color_image = color_image,
-								.depth_image = depth_image,
-							},
-						},
-					};
-				},
-
-				.static => |static| {
-					const height = std.math.cast(u16, static.data.len / (static.width * desc.format.byte_size())) orelse {
-						return error.OutOfMemory;
-					};
-
-					if (static.width == 0 or height == 0) {
-						return .{
-							.width = static.width,
-							.height = height,
-							.access = .empty,
-						};
-					}
-
-					const image = sokol.gfx.makeImage(image_desc: {
-						var image_desc = sokol.gfx.ImageDesc{
-							.height = height,
-							.pixel_format = pixel_format,
-							.width = static.width,
-						};
-
-						image_desc.data.subimage[0][0] = sokol.gfx.asRange(static.data);
-
-						break: image_desc image_desc;
-					});
-
-					errdefer {
-						sokol.gfx.destroyImage(image);
-					}
-
-					return .{
-						.width = static.width,
-						.height = height,
-
-						.access = .{
-							.static = .{
-								.image = image,
-							},
-						},
-					};
-				},
-			}
-		}
-	};
-
-
-	const EffectPool = coral.Pool(Effect);
-
-	const TexturePool = coral.Pool(Texture);
-
-	pub fn create_effect(self: *Resources, desc: gfx.Effect.Desc) !gfx.Effect {
-		var effect = try Effect.init(desc);
-
-		errdefer effect.deinit();
-
-		return @enumFromInt(try self.effects.insert(effect));
-	}
-
-	pub fn create_texture(self: *Resources, desc: gfx.Texture.Desc) !gfx.Texture {
-		var texture = try Texture.init(desc);
-
-		errdefer texture.deinit();
-
-		return @enumFromInt(try self.textures.insert(texture));
-	}
-
-	pub fn deinit(self: *Resources) void {
-		var textures = self.textures.values();
-
-		while (textures.next()) |texture| {
-			texture.deinit();
-		}
-
-		self.textures.deinit();
-	}
-
-	pub fn destroy_effect(self: *Resources, handle: gfx.Effect) bool {
-		switch (handle) {
-			.default => {},
-
-			else => {
-				var effect = self.effects.remove(@intFromEnum(handle)) orelse {
-					return false;
-				};
-
-				effect.deinit();
-			},
-		}
-
-		return true;
-	}
-
-	pub fn destroy_texture(self: *Resources, handle: gfx.Texture) bool {
-		switch (handle) {
-			.default => {},
-
-			else => {
-				var texture = self.textures.remove(@intFromEnum(handle)) orelse {
-					return false;
-				};
-
-				texture.deinit();
-			},
-		}
-
-		return true;
-	}
-
-	pub fn get_effect(self: *Resources, handle: gfx.Effect) ?*Effect {
-		return self.effects.get(@intFromEnum(handle));
-	}
-
-	pub fn get_texture(self: *Resources, handle: gfx.Texture) ?*Texture {
-		return self.textures.get(@intFromEnum(handle));
-	}
-
-	pub fn init(allocator: std.mem.Allocator) !Resources {
-		var pools = Resources{
-			.effects = EffectPool.init(allocator),
-			.textures = TexturePool.init(allocator),
-		};
-
-		errdefer {
-			pools.deinit();
-		}
-
-		const assert = struct {
-			fn is_handle(expected: anytype, actual: @TypeOf(expected)) void {
-				std.debug.assert(actual == expected);
-			}
-		};
-
-		assert.is_handle(gfx.Effect.default, try pools.create_effect(.{
-			.fragment_spirv_ops = &spirv.to_ops(@embedFile("./shaders/2d_default.frag.spv")),
-		}));
-
-		assert.is_handle(gfx.Texture.default, try pools.create_texture(.{
-			.format = .rgba8,
-
-			.access = .{
-				.static = .{
-					.data = std.mem.asBytes(&[_]u32{
-						0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080,
-						0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000,
-						0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080,
-						0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000,
-						0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080,
-						0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000,
-						0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080,
-						0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000, 0xFF800080, 0xFF000000,
-					}),
-
-					.width = 8,
-				},
-			},
-		}));
-
-		assert.is_handle(gfx.Texture.backbuffer, try pools.create_texture(.{
-			.format = .rgba8,
-
-			.access = .{
-				.render = .{
-					.width = 0,
-					.height = 0,
-				},
-			}
-		}));
-
-		return pools;
-	}
-};
-
-var default_sampler: sokol.gfx.Sampler = undefined;
-
-var quad_index_buffer: sokol.gfx.Buffer = undefined;
-
-var quad_vertex_buffer: sokol.gfx.Buffer = undefined;
-
-const vertex_indices = .{
-	.mesh = 0,
-	.instance = 1,
-};
-
-pub fn run(pending_work: *gfx.Assets.WorkQueue, window: *ext.SDL_Window) !void {
-	const context = configure_and_create: {
-		var result = @as(c_int, 0);
-
-		result |= ext.SDL_GL_SetAttribute(ext.SDL_GL_CONTEXT_FLAGS, ext.SDL_GL_CONTEXT_FORWARD_COMPATIBLE_FLAG);
-		result |= ext.SDL_GL_SetAttribute(ext.SDL_GL_CONTEXT_PROFILE_MASK, ext.SDL_GL_CONTEXT_PROFILE_CORE);
-		result |= ext.SDL_GL_SetAttribute(ext.SDL_GL_CONTEXT_MAJOR_VERSION, 3);
-		result |= ext.SDL_GL_SetAttribute(ext.SDL_GL_CONTEXT_MINOR_VERSION, 3);
-		result |= ext.SDL_GL_SetAttribute(ext.SDL_GL_DOUBLEBUFFER, 1);
-
-		if (result != 0) {
-			return error.Unsupported;
-		}
-
-		break: configure_and_create ext.SDL_GL_CreateContext(window);
-	};
-
-	defer ext.SDL_GL_DeleteContext(context);
-
-	sokol.gfx.setup(.{
-		.environment = .{
-			.defaults = .{
-				.color_format = .RGBA8,
-				.depth_format = .DEPTH_STENCIL,
-				.sample_count = 1,
-			},
-		},
-
-		.logger = .{
-			.func = sokol.log.func,
-		},
-	});
-
-	defer {
-		sokol.gfx.shutdown();
-	}
-
-	var pools = try Resources.init(coral.heap.allocator);
-
-	defer {
-		pools.deinit();
-	}
-
-	const Vertex = struct {
-		xy: @Vector(2, f32),
-		uv: @Vector(2, f32),
-	};
-
-	const quad_indices = [_]u16{0, 1, 2, 0, 2, 3};
-
-	const quad_vertices = [_]Vertex{
-		.{.xy = .{-0.5, -0.5}, .uv = .{0, 1}},
-		.{.xy = .{0.5, -0.5}, .uv = .{1, 1}},
-		.{.xy = .{0.5, 0.5}, .uv = .{1, 0}},
-		.{.xy = .{-0.5, 0.5},  .uv = .{0, 0}},
-	};
-
-	quad_index_buffer = sokol.gfx.makeBuffer(.{
-		.data = sokol.gfx.asRange(&quad_indices),
-		.type = .INDEXBUFFER,
-	});
-
-	quad_vertex_buffer = sokol.gfx.makeBuffer(.{
-		.data = sokol.gfx.asRange(&quad_vertices),
-		.type = .VERTEXBUFFER,
-	});
-
-	default_sampler = sokol.gfx.makeSampler(.{});
-
-	while (true) {
-		switch (pending_work.dequeue()) {
-			.load_effect => |load| {
-				const effect = try pools.create_effect(load.desc);
-
-				if (!load.loaded.resolve(effect)) {
-					std.debug.assert(pools.destroy_effect(effect));
-				}
-			},
-
-			.load_texture => |load| {
-				const texture = try pools.create_texture(load.desc);
-
-				if (!load.loaded.resolve(texture)) {
-					std.debug.assert(pools.destroy_texture(texture));
-				}
-			},
-
-			.render_frame => |render_frame| {
-				const backbuffer = pools.get_texture(.backbuffer).?;
-
-				if (backbuffer.width != render_frame.width or backbuffer.height != render_frame.height) {
-					backbuffer.deinit();
-
-					backbuffer.* = try Resources.Texture.init(.{
-						.format = .rgba8,
-
-						.access = .{
-							.render = .{
-								.width = render_frame.width,
-								.height = render_frame.height,
-							},
-						},
-					});
-				}
-
-				var frame = Frame{
-					.swapchain = .{
-						.width = render_frame.width,
-						.height = render_frame.height,
-						.sample_count = 1,
-						.color_format = .RGBA8,
-						.depth_format = .DEPTH_STENCIL,
-						.gl = .{.framebuffer = 0},
-					}
-				};
-
-				sokol.gfx.beginPass(pass: {
-					var pass = sokol.gfx.Pass{
-						.action = .{
-							.stencil = .{
-								.load_action = .CLEAR,
-							},
-
-							.depth = .{
-								.load_action = .CLEAR,
-								.clear_value = 0,
-							}
-						},
-					};
-
-					pass.action.colors[0] = .{
-						.load_action = .CLEAR,
-						.clear_value = @bitCast(render_frame.clear_color),
-					};
-
-					pass.attachments = pools.get_texture(.backbuffer).?.access.render.attachments;
-
-					break: pass pass;
-				});
-
-				var has_command_params = render_frame.has_command_params;
-
-				while (has_command_params) |command_params| : (has_command_params = command_params.has_next) {
-					for (command_params.param.submitted_commands()) |command| {
-						try switch (command) {
-							.draw_texture => |draw_texture| frame.draw_texture(&pools, draw_texture),
-							.set_effect => |set_effect| frame.set_effect(&pools, set_effect),
-							.set_target => |set_target| frame.set_target(&pools, set_target),
-						};
-					}
-
-					frame.flush(&pools);
-
-					if (frame.current_target_texture != .backbuffer) {
-						frame.set_target(&pools, .{
-							.texture = .backbuffer,
-							.clear_color = null,
-							.clear_depth = null,
-							.clear_stencil = null,
-						});
-					}
-				}
-
-				sokol.gfx.endPass();
-
-				sokol.gfx.beginPass(swapchain_pass: {
-					var pass = sokol.gfx.Pass{
-						.swapchain = frame.swapchain,
-
-						.action = .{
-							.stencil = .{.load_action = .CLEAR},
-							.depth = .{.load_action = .CLEAR},
-						},
-					};
-
-					pass.action.colors[0] = .{.load_action = .CLEAR};
-
-					break: swapchain_pass pass;
-				});
-
-				try frame.draw_texture(&pools, .{
-					.texture = .backbuffer,
-
-					.transform = .{
-						.origin = .{@as(f32, @floatFromInt(render_frame.width)) / 2, @as(f32, @floatFromInt(render_frame.height)) / 2},
-						.xbasis = .{@floatFromInt(render_frame.width), 0},
-						.ybasis = .{0, @floatFromInt(render_frame.height)},
-					},
-				});
-
-				frame.flush(&pools);
-				sokol.gfx.endPass();
-				sokol.gfx.commit();
-				ext.SDL_GL_SwapWindow(window);
-				render_frame.finished.set();
-			},
-
-			.shutdown => {
-				break;
-			},
-
-			.unload_effect => |unload| {
-				if (!pools.destroy_effect(unload.handle)) {
-					@panic("Attempt to unload a non-existent effect");
-				}
-			},
-
-			.unload_texture => |unload| {
-				if (!pools.destroy_texture(unload.handle)) {
-					@panic("Attempt to unload a non-existent texture");
-				}
-			},
-		}
-	}
-}
-
-var work_thread: std.Thread = undefined;

src/ona/gfx/spirv.zig

@@ -4,8 +4,6 @@ const ext = @cImport({
 	@cInclude("spirv-cross/spirv_cross_c.h");
 });
 
-const sokol = @import("sokol");
-
 const std = @import("std");
 
 pub const Error = std.mem.Allocator.Error || error {

src/ona/gfx/textures.zig

@@ -1,38 +0,0 @@
-const coral = @import("coral");
-
-pub const Format = enum {
-	rgba8,
-	bgra8,
-
-	pub fn byte_size(self: Format) usize {
-		return switch (self) {
-			.rgba8, .bgra8 => 4,
-		};
-	}
-};
-
-pub const Desc = struct {
-	format: Format,
-	access: Access,
-
-	pub const Access = union (enum) {
-		static: StaticAccess,
-		render: RenderAccess,
-	};
-
-	pub const StaticAccess = struct {
-		width: u16,
-		data: []const coral.io.Byte,
-	};
-
-	pub const RenderAccess = struct {
-		width: u16,
-		height: u16,
-	};
-};
-
-pub const Handle = enum (u32) {
-	default,
-	backbuffer,
-	_,
-};