Initial DebugDraw API support

.github/workflows/test.yaml

@@ -92,3 +92,6 @@ jobs:
       - name: Build example 02
         shell: bash
         run: cd examples/02-runtime-shaderc && zig build
+      - name: Build example 03
+        shell: bash
+        run: cd examples/03-debugdraw && zig build

README.md

@@ -10,19 +10,19 @@ REMEMBER: This is only zig binding. For BGFX stuff goto [bgfx](https://github.co
 
 - [x] Zig api.
 - [x] Compile as standard zig library.
+- [x] `shaderc` as build artifact.
 - [x] Shader compile in `build.zig` to `*.bin.h`.
 - [x] Shader compile in `build.zig` and embed as zig module. (this is zig equivalent of `*.bin.h`)
 - [x] Shader compile from code (in memory solution, no tmp files).
-- [x] `shaderc` as build artifact.
+- [x] Binding for [DebugDraw API](https://github.com/bkaradzic/bgfx/tree/master/examples/common/debugdraw)
 - [x] `imgui` render backend. Use build option `imgui_include` to enable. ex. for
   zgui: `.imgui_include = zgui.path("libs").getPath(b),`
 
-
-- [ ] WIP: [DebugDraw API](https://github.com/bkaradzic/bgfx/tree/master/examples/common/debugdraw)
-
 ## Warnings
 
 - Shader compile/shaderc api is first draft and need cleanup.
+- Binding for DebugDraw is first draft and need cleanup.
+- `shaderc` and `shaderc-static` need some time to compile.
 
 ## Know problems
 
@@ -72,13 +72,6 @@ See examples for binding usage and [bgfx](https://github.com/bkaradzic/bgfx) for
 | `with_shaderc`        | `true`  | Compile with shaderc executable                      |
 | `with_static_shaderc` | `true`  | Compile with shaderc as static lib                   |
 
-## License
-
-Folders `libs`, `shaders`, `src/imgui_impl_bgfx` is copy&paste from [bgfx](https://github.com/bkaradzic/bgfx) for more
-sell-contained experience and is licensed [by](https://github.com/bkaradzic/bgfx/blob/master/LICENSE)
-
-Zig binding is licensed by [WTFPL](LICENSE)
-
 ## Examples
 
 Examples use [zig-gamedev](https://github.com/zig-gamedev/zig-gamedev) as submodule.
@@ -134,3 +127,26 @@ zig-out/bin/runtime-shaderc
 | `v` | Vsync on/off                |
 | `d` | Debug on/off                |
 | `r` | Recompile shaders form file |
+
+### [03-debugdraw](examples/03-debugdraw/)
+
+DebugDraw api usage example.
+
+```sh
+cd examples/03-debugdraw
+zig build
+zig-out/bin/runtime-shaderc
+```
+
+| Key | Description                 |
+|-----|-----------------------------|
+| `v` | Vsync on/off                |
+| `d` | Debug on/off                |
+| `r` | Recompile shaders form file |
+
+## License
+
+Folders `libs`, `shaders`, `src/imgui_impl_bgfx` is copy&paste from [bgfx](https://github.com/bkaradzic/bgfx) for more
+sell-contained experience and is licensed [by](https://github.com/bkaradzic/bgfx/blob/master/LICENSE)
+
+Zig binding is licensed by [WTFPL](LICENSE)

build.zig

@@ -165,6 +165,14 @@ pub fn build(b: *std.Build) !void {
         },
     });
 
+    // debugdraw
+    bgfx.addCSourceFiles(.{
+        .flags = &cxx_options,
+        .files = &[_][]const u8{
+            "libs/bgfx/examples/common/debugdraw/debugdraw.cpp",
+        },
+    });
+
     //
     // Bgfx imgui backend
     // TODO: zig based

examples/00-minimal/src/main.zig

@@ -197,7 +197,7 @@ pub fn main() anyerror!u8 {
     // Create view and proj matrices
     //
     const viewMtx = zm.lookAtRh(zm.f32x4(0.0, 0.0, -50.0, 1.0), zm.f32x4(0.0, 0.0, 0.0, 1.0), zm.f32x4(0.0, 1.0, 0.0, 0.0));
-    var projMtx = zm.perspectiveFovRhGl(0.25 * math.pi, @as(f32, @floatFromInt(old_size[0])) / @as(f32, @floatFromInt(old_size[1])), 0.1, 100.0);
+    var projMtx: zm.Mat = undefined;
 
     //
     // Default state

examples/02-runtime-shaderc/src/main.zig

@@ -246,7 +246,7 @@ pub fn main() anyerror!u8 {
     // Create view and proj matrices
     //
     const viewMtx = zm.lookAtRh(zm.f32x4(0.0, 0.0, -50.0, 1.0), zm.f32x4(0.0, 0.0, 0.0, 1.0), zm.f32x4(0.0, 1.0, 0.0, 0.0));
-    var projMtx = zm.perspectiveFovRhGl(0.25 * math.pi, @as(f32, @floatFromInt(old_size[0])) / @as(f32, @floatFromInt(old_size[1])), 0.1, 100.0);
+    var projMtx: zm.Mat = undefined;
 
     //
     // Default state

examples/03-debugdraw/build.zig

@@ -0,0 +1,53 @@
+const std = @import("std");
+
+const zbgfx = @import("zbgfx");
+
+pub fn build(b: *std.Build) !void {
+    const target = b.standardTargetOptions(.{});
+    const optimize = b.standardOptimizeOption(.{});
+
+    //
+    // OPTIONS
+    //
+
+    //
+    // Dependencies
+    //
+    const zbgfx_dep = b.dependency(
+        "zbgfx",
+        .{
+            .target = target,
+            .optimize = optimize,
+        },
+    );
+
+    const zglfw = b.dependency(
+        "zglfw",
+        .{
+            .target = target,
+            .optimize = optimize,
+        },
+    );
+
+    const zmath = b.dependency(
+        "zmath",
+        .{
+            .target = target,
+            .optimize = optimize,
+        },
+    );
+
+    const exe = b.addExecutable(.{
+        .name = "debugdraw",
+        .root_source_file = .{ .path = "src/main.zig" },
+        .target = target,
+    });
+    b.installArtifact(exe);
+    exe.linkLibrary(zbgfx_dep.artifact("bgfx"));
+
+    exe.root_module.addImport("zbgfx", zbgfx_dep.module("zbgfx"));
+
+    exe.root_module.addImport("zmath", zmath.module("root"));
+    exe.root_module.addImport("zglfw", zglfw.module("root"));
+    exe.linkLibrary(zglfw.artifact("glfw"));
+}

examples/03-debugdraw/build.zig.zon

@@ -0,0 +1,14 @@
+.{
+    .name = "zbgfx-minimal",
+    .version = "0.1.0",
+    .paths = .{
+        "build.zig",
+        "build.zig.zon",
+    },
+
+    .dependencies = .{
+        .zbgfx = .{ .path = "../../" },
+        .zglfw = .{ .path = "../libs/zig-gamedev/libs/zglfw" },
+        .zmath = .{ .path = "../libs/zig-gamedev/libs/zmath" },
+    },
+}