From 885a8652cb8a433a18811d90048d11c1ec67b60e Mon Sep 17 00:00:00 2001
From: s-ol <s-ol@users.noreply.github.com>
Date: Sun, 26 Jan 2020 20:49:25 +0100
Subject: break OSC in favor of uniform caching

---
 src/debug_gl.zig | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

(limited to 'src/debug_gl.zig')

diff --git a/src/debug_gl.zig b/src/debug_gl.zig
index 2fdcda0..ebb552f 100644
--- a/src/debug_gl.zig
+++ b/src/debug_gl.zig
@@ -6,11 +6,27 @@ const builtin = @import("builtin");
 
 pub const is_on = if (builtin.mode == builtin.Mode.ReleaseFast) c.GL_FALSE else c.GL_TRUE;
 
+fn glDebugMessage(source: c.GLenum, typ: c.GLenum, id: c.GLuint, severity: c.GLenum, length: c.GLsizei, _message: [*c]const u8, user: ?*const c_void) callconv(.C) void {
+    const message = _message[0..@intCast(usize, length)];
+    std.debug.warn("GL Callback [{}] {} / {}: {s}\n", .{ source, typ, severity, message });
+}
+
+pub fn init() void {
+    if (is_on == c.GL_TRUE) {
+        c.glEnable(c.GL_DEBUG_OUTPUT);
+        c.glDebugMessageCallback(glDebugMessage, null);
+    }
+}
+
 pub fn assertNoError() void {
-    if (builtin.mode != builtin.Mode.ReleaseFast) {
-        const err = c.glGetError();
-        if (err != c.GL_NO_ERROR) {
+    if (is_on == c.GL_TRUE) {
+        var err = c.glGetError();
+        while (err != c.GL_NO_ERROR) : (err = c.glGetError()) {
             panic("GL error: {}\n", .{err});
+        } else {
+            return;
         }
+
+        panic("GL Errors encountered.\n", .{err});
     }
 }
-- 
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