From 5513044d61b4817fa1830bc3ea8278e206c4d684 Mon Sep 17 00:00:00 2001
From: duck <duck@duckdesktop>
Date: Fri, 28 Mar 2025 01:02:56 +0500
Subject: [PATCH] Shader compile step

---
 assets/shaders/basic.frag |  8 ++++++++
 assets/shaders/basic.vert |  8 ++++++++
 build.zig                 | 15 +++++++++++++++
 build.zig.zon             |  1 +
 src/graphics.zig          |  1 +
 5 files changed, 33 insertions(+)
 create mode 100644 assets/shaders/basic.frag
 create mode 100644 assets/shaders/basic.vert
 create mode 100644 src/graphics.zig

diff --git a/assets/shaders/basic.frag b/assets/shaders/basic.frag
new file mode 100644
index 0000000..87c5d51
--- /dev/null
+++ b/assets/shaders/basic.frag
@@ -0,0 +1,8 @@
+#version 450
+
+layout(location = 0) in vec2 fragCoord;
+layout(location = 0) out vec4 fragColor;
+
+void main() {
+    fragColor = vec4(fragCoord, 0.0, 1.0);
+}
diff --git a/assets/shaders/basic.vert b/assets/shaders/basic.vert
new file mode 100644
index 0000000..11b0e06
--- /dev/null
+++ b/assets/shaders/basic.vert
@@ -0,0 +1,8 @@
+#version 450
+
+layout(location = 0) in vec2 inCoord;
+layout(location = 0) out vec2 outCoord;
+
+void main() {
+    outCoord = inCoord;
+}
diff --git a/build.zig b/build.zig
index 6cd6441..7524b70 100644
--- a/build.zig
+++ b/build.zig
@@ -1,5 +1,10 @@
 const std = @import("std");
 
+const SHADERS: []const struct { file: []const u8, stage: []const u8 } = &.{
+    .{ .file = "basic", .stage = "vert" },
+    .{ .file = "basic", .stage = "frag" },
+};
+
 pub fn build(b: *std.Build) void {
     const target = b.standardTargetOptions(.{});
     const optimize = b.standardOptimizeOption(.{});
@@ -14,6 +19,16 @@ pub fn build(b: *std.Build) void {
     exe.linkLibC();
     exe.linkSystemLibrary("SDL3");
 
+    inline for (SHADERS) |shader| {
+        const glslc = b.addSystemCommand(&.{"glslc"});
+        glslc.addArg("-fshader-stage=" ++ shader.stage);
+        glslc.addFileArg(b.path("assets/shaders/" ++ shader.file ++ "." ++ shader.stage));
+        glslc.addArg("-o");
+        const filename = shader.file ++ "_" ++ shader.stage ++ ".spv";
+        const shader_artifact = glslc.addOutputFileArg(filename);
+        b.getInstallStep().dependOn(&b.addInstallFileWithDir(shader_artifact, .prefix, filename).step);
+    }
+
     const run_cmd = b.addRunArtifact(exe);
     run_cmd.step.dependOn(b.getInstallStep());
     if (b.args) |args| {
diff --git a/build.zig.zon b/build.zig.zon
index 3cd4506..006535f 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -6,5 +6,6 @@
         "build.zig",
         "build.zig.zon",
         "src",
+        "assets",
     },
 }
diff --git a/src/graphics.zig b/src/graphics.zig
new file mode 100644
index 0000000..5c17d7d
--- /dev/null
+++ b/src/graphics.zig
@@ -0,0 +1 @@
+const sdl = @import("sdl.zig");