From 621be5db352a05864de8b7e4f7963304fb922f64 Mon Sep 17 00:00:00 2001
From: Kbz-8 <kbz_8.code@proton.me>
Date: Thu, 30 Apr 2026 00:26:50 +0200
Subject: [PATCH] base index draw

---
 build.zig.zon                  |  5 +++--
 src/soft/SoftCommandBuffer.zig | 29 +++++++++++++++++++++++++++++
 src/vulkan/CommandBuffer.zig   |  5 +++++
 src/vulkan/lib_vulkan.zig      |  8 +-------
 4 files changed, 38 insertions(+), 9 deletions(-)

diff --git a/build.zig.zon b/build.zig.zon
index ed06482..2e8d922 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -31,11 +31,12 @@
             .hash = "zmath-0.11.0-dev-wjwivdMsAwD-xaLj76YHUq3t9JDH-X16xuMTmnDzqbu2",
         },
         .SPIRV_Interpreter = .{
-            .url = "git+https://git.kbz8.me/kbz_8/SPIRV-Interpreter#ce172090044354d5ea70f1bf79bd077fb6722e29",
-            .hash = "SPIRV_Interpreter-0.0.1-ajmpn2cbBQA67LOLx5fml7Uf7iRw32jwOZh0ZIX4YJyh",
+            .url = "git+https://git.kbz8.me/kbz_8/SPIRV-Interpreter#5faf8fd30548f8bd96a18568fb21de698db64ca8",
+            .hash = "SPIRV_Interpreter-0.0.1-ajmpn_crBQAl1X8EYgNQjoTn_3XZ1DDOBCZMpfyD6MTu",
             .lazy = true,
         },
         //.SPIRV_Interpreter = .{
+        //    // For development
         //    .path = "../SPIRV-Interpreter",
         //    .lazy = true,
         //},
diff --git a/src/soft/SoftCommandBuffer.zig b/src/soft/SoftCommandBuffer.zig
index c01b7e4..71840b6 100644
--- a/src/soft/SoftCommandBuffer.zig
+++ b/src/soft/SoftCommandBuffer.zig
@@ -48,6 +48,7 @@ pub fn create(device: *base.Device, allocator: std.mem.Allocator, info: *const v
         .beginRenderPass = beginRenderPass,
         .bindDescriptorSets = bindDescriptorSets,
         .bindPipeline = bindPipeline,
+        .bindIndexBuffer = bindIndexBuffer,
         .bindVertexBuffer = bindVertexBuffer,
         .blitImage = blitImage,
         .clearAttachment = clearAttachment,
@@ -226,6 +227,34 @@ pub fn bindPipeline(interface: *Interface, bind_point: vk.PipelineBindPoint, pip
     self.commands.append(allocator, .{ .ptr = cmd, .vtable = &.{ .execute = CommandImpl.execute } }) catch return VkError.OutOfHostMemory;
 }
 
+pub fn bindIndexBuffer(interface: *Interface, buffer: *base.Buffer, offset: usize, index_type: vk.IndexType) VkError!void {
+    const self: *Self = @alignCast(@fieldParentPtr("interface", interface));
+    const allocator = self.command_allocator.allocator();
+
+    const CommandImpl = struct {
+        const Impl = @This();
+
+        buffer: *const SoftBuffer,
+        offset: usize,
+        index_type: vk.IndexType,
+
+        pub fn execute(context: *anyopaque, device: *ExecutionDevice) VkError!void {
+            const impl: *Impl = @ptrCast(@alignCast(context));
+            _ = impl;
+            _ = device;
+        }
+    };
+
+    const cmd = allocator.create(CommandImpl) catch return VkError.OutOfHostMemory;
+    errdefer allocator.destroy(cmd);
+    cmd.* = .{
+        .buffer = @alignCast(@fieldParentPtr("interface", buffer)),
+        .offset = offset,
+        .index_type = index_type,
+    };
+    self.commands.append(allocator, .{ .ptr = cmd, .vtable = &.{ .execute = CommandImpl.execute } }) catch return VkError.OutOfHostMemory;
+}
+
 pub fn bindVertexBuffer(interface: *Interface, index: usize, buffer: *base.Buffer, offset: usize) VkError!void {
     const self: *Self = @alignCast(@fieldParentPtr("interface", interface));
     const allocator = self.command_allocator.allocator();
diff --git a/src/vulkan/CommandBuffer.zig b/src/vulkan/CommandBuffer.zig
index cd60f4b..2b482b2 100644
--- a/src/vulkan/CommandBuffer.zig
+++ b/src/vulkan/CommandBuffer.zig
@@ -42,6 +42,7 @@ pub const DispatchTable = struct {
     beginRenderPass: *const fn (*Self, *RenderPass, *Framebuffer, vk.Rect2D, ?[]const vk.ClearValue) VkError!void,
     bindDescriptorSets: *const fn (*Self, vk.PipelineBindPoint, u32, [lib.VULKAN_MAX_DESCRIPTOR_SETS]?*DescriptorSet, []const u32) VkError!void,
     bindPipeline: *const fn (*Self, vk.PipelineBindPoint, *Pipeline) VkError!void,
+    bindIndexBuffer: *const fn (*Self, *Buffer, usize, vk.IndexType) VkError!void,
     bindVertexBuffer: *const fn (*Self, usize, *Buffer, usize) VkError!void,
     blitImage: *const fn (*Self, *Image, vk.ImageLayout, *Image, vk.ImageLayout, []const vk.ImageBlit, vk.Filter) VkError!void,
     clearAttachment: *const fn (*Self, vk.ClearAttachment, vk.ClearRect) VkError!void,
@@ -163,6 +164,10 @@ pub inline fn bindPipeline(self: *Self, bind_point: vk.PipelineBindPoint, pipeli
     try self.dispatch_table.bindPipeline(self, bind_point, pipeline);
 }
 
+pub inline fn bindIndexBuffer(self: *Self, buffer: *Buffer, offset: usize, index_type: vk.IndexType) VkError!void {
+    try self.dispatch_table.bindIndexBuffer(self, buffer, offset, index_type);
+}
+
 pub inline fn bindVertexBuffer(self: *Self, index: usize, buffer: *Buffer, offset: usize) VkError!void {
     try self.dispatch_table.bindVertexBuffer(self, index, buffer, offset);
 }
diff --git a/src/vulkan/lib_vulkan.zig b/src/vulkan/lib_vulkan.zig
index d20c34b..d969e54 100644
--- a/src/vulkan/lib_vulkan.zig
+++ b/src/vulkan/lib_vulkan.zig
@@ -1651,13 +1651,7 @@ pub export fn strollCmdBindIndexBuffer(p_cmd: vk.CommandBuffer, p_buffer: vk.Buf
 
     const cmd = Dispatchable(CommandBuffer).fromHandleObject(p_cmd) catch |err| return errorLogger(err);
     const buffer = NonDispatchable(Buffer).fromHandleObject(p_buffer) catch |err| return errorLogger(err);
-
-    notImplementedWarning();
-
-    _ = cmd;
-    _ = buffer;
-    _ = offset;
-    _ = index_type;
+    cmd.bindIndexBuffer(buffer, offset, index_type) catch |err| return errorLogger(err);
 }
 
 pub export fn strollCmdBindPipeline(p_cmd: vk.CommandBuffer, bind_point: vk.PipelineBindPoint, p_pipeline: vk.Pipeline) callconv(vk.vulkan_call_conv) void {