working on vertex implementation

src/soft/device/Renderer.zig

@@ -15,21 +15,12 @@ const SoftFramebuffer = @import("../SoftFramebuffer.zig");
 const SoftPipeline = @import("../SoftPipeline.zig");
 const SoftRenderPass = @import("../SoftRenderPass.zig");
 
+const vertex_dispatcher = @import("vertex_dispatcher.zig");
+
 const VkError = base.VkError;
 
 const Self = @This();
 
-const VertexInputBindingState = struct {
-    input_rate: vk.VertexInputRate,
-    stride: usize,
-};
-
-const VertexInputAttributeState = struct {
-    format: vk.Format,
-    offset: usize,
-    binding: usize,
-};
-
 pub const VertexBuffer = struct {
     buffer: *const SoftBuffer,
     offset: usize,
@@ -39,20 +30,7 @@ pub const VertexBuffer = struct {
 pub const DynamicState = struct {
     viewport: vk.Viewport,
     scissor: vk.Rect2D,
-
     line_width: f32,
-    cull_mode: vk.CullModeFlags,
-    front_face: vk.FrontFace,
-    primitive_topology: vk.PrimitiveTopology,
-
-    vertex_input_bindings: [lib.MAX_VERTEX_INPUT_BINDINGS]VertexInputBindingState,
-    vertex_input_attributes: [lib.MAX_VERTEX_INPUT_ATTRIBUTES]VertexInputAttributeState,
-};
-
-const Vertex = struct {
-    position: F32x4,
-    point_size: f32,
-    index: usize,
 };
 
 device: *SoftDevice,
@@ -72,23 +50,73 @@ pub fn init(device: *SoftDevice, state: *PipelineState) Self {
     };
 }
 
-pub fn drawPrimitive(self: *Self, vertex_count: usize, instance_count: usize, first_vertex: usize, first_instance: usize) void {
-    const allocator = self.device.device_allocator.allocator();
+pub fn draw(self: *Self, vertex_count: usize, instance_count: usize, first_vertex: usize, first_instance: usize) VkError!void {
+    _ = first_vertex;
+    _ = first_instance;
 
-    const vertices = self.fetchVertexInput(allocator, vertex_count, instance_count, first_vertex, first_instance);
-    _ = vertices;
+    self.inputAssemblyStage() catch |err| {
+        std.log.scoped(.@"Input assembly stage").err("catched a '{s}'", .{@errorName(err)});
+        if (@errorReturnTrace()) |trace| {
+            std.debug.dumpErrorReturnTrace(trace);
+        }
+    };
+
+    self.vertexShaderStage(vertex_count, instance_count) catch |err| {
+        std.log.scoped(.@"Input assembly stage").err("catched a '{s}'", .{@errorName(err)});
+        if (@errorReturnTrace()) |trace| {
+            std.debug.dumpErrorReturnTrace(trace);
+        }
+    };
+
+    self.primitiveAssemblyStage();
+    self.fragmentShaderStage();
 }
 
 pub fn deinit(self: *Self) void {
     _ = self;
 }
 
-fn fetchVertexInput(self: *const Self, allocator: std.mem.Allocator, vertex_count: usize, instance_count: usize, first_vertex: usize, first_instance: usize) []Vertex {
-    _ = self;
-    _ = allocator;
-    _ = vertex_count;
-    _ = instance_count;
-    _ = first_vertex;
-    _ = first_instance;
-    return undefined;
+fn inputAssemblyStage(self: *Self) !void {
+    const pipeline = self.state.pipeline orelse return;
+    for ((pipeline.stages.getPtr(.vertex) orelse return).runtimes) |*rt| {
+        for (pipeline.interface.mode.graphics.input_assembly.attribute_description orelse return) |attribute| {
+            const location_result = try rt.getResultByLocation(attribute.location, .input);
+
+            const vertex_buffer = self.state.data.graphics.vertex_buffers[attribute.binding];
+            const buffer = vertex_buffer.buffer;
+            const buffer_memory_size = base.format.texelSize(attribute.format);
+            const buffer_memory = if (buffer.interface.memory) |memory| memory else return VkError.InvalidDeviceMemoryDrv;
+            const buffer_memory_map: []u8 = @as([*]u8, @ptrCast(@alignCast(try buffer_memory.map(buffer.interface.offset + attribute.offset, buffer_memory_size))))[0..buffer_memory_size];
+
+            try rt.writeInput(buffer_memory_map, location_result);
+        }
+    }
+}
+
+fn vertexShaderStage(self: *Self, vertex_count: usize, instance_count: usize) !void {
+    const invocation_count = vertex_count * instance_count;
+    const pipeline = self.state.pipeline orelse return;
+    const batch_size = (pipeline.stages.getPtr(.vertex) orelse return).runtimes.len;
+
+    var wg: std.Io.Group = .init;
+    for (0..@min(batch_size, invocation_count)) |batch_id| {
+        const run_data: vertex_dispatcher.RunData = .{
+            .renderer = self,
+            .pipeline = pipeline,
+            .batch_id = batch_id,
+            .batch_size = batch_size,
+            .invocation_count = invocation_count,
+        };
+
+        wg.async(self.device.interface.io(), vertex_dispatcher.runWrapper, .{run_data});
+    }
+    wg.await(self.device.interface.io()) catch return VkError.DeviceLost;
+}
+
+fn primitiveAssemblyStage(self: *Self) void {
+    _ = self;
+}
+
+fn fragmentShaderStage(self: *Self) void {
+    _ = self;
 }