implementing push constants

src/soft/device/Device.zig

@@ -22,6 +22,7 @@ pub const COMPUTE_PIPELINE_STATE = 1;
 pub const PipelineState = struct {
     pipeline: ?*SoftPipeline,
     sets: [base.VULKAN_MAX_DESCRIPTOR_SETS]?*SoftDescriptorSet,
+    push_constant_blob: [lib.PUSH_CONSTANT_SIZE]u8,
     data: union {
         compute: struct {},
         graphics: struct {
@@ -43,6 +44,7 @@ pub fn init(self: *Self, device: *SoftDevice) void {
         state.* = .{
             .pipeline = null,
             .sets = [_]?*SoftDescriptorSet{null} ** base.VULKAN_MAX_DESCRIPTOR_SETS,
+            .push_constant_blob = @splat(0),
             .data = switch (i) {
                 GRAPHICS_PIPELINE_STATE => .{
                     .graphics = .{

src/soft/device/rasterizer.zig

@@ -21,6 +21,8 @@ fn interpolateF32x4(value0: F32x4, value1: F32x4, value2: F32x4, b0: f32, b1: f3
     return (value0 * @as(F32x4, @splat(b0))) + (value1 * @as(F32x4, @splat(b1))) + (value2 * @as(F32x4, @splat(b2)));
 }
 
+var calls: usize = 0;
+
 fn interpolateVertexOutputs(
     allocator: std.mem.Allocator,
     v0: *const Renderer.Vertex,
@@ -43,6 +45,8 @@ fn interpolateVertexOutputs(
         }
 
         const len = @min(out0.blob.len, out1.blob.len, out2.blob.len);
+        calls += 1;
+        std.debug.print("test {d}\n", .{calls});
         const input = allocator.alloc(u8, len) catch return VkError.OutOfDeviceMemory;
 
         var byte_index: usize = 0;

src/soft/device/vertex_dispatcher.zig

@@ -39,6 +39,7 @@ inline fn run(data: RunData) !void {
 
     const shader = data.pipeline.stages.getPtrAssertContains(.vertex);
     const rt = &shader.runtimes[data.batch_id];
+    try rt.populatePushConstants(data.renderer.state.push_constant_blob[0..]);
 
     const entry = try rt.getEntryPointByName(shader.entry);