diff --git a/src/imgui_impl.ts b/src/imgui_impl.ts
index 50a5b84..a085ec5 100644
--- a/src/imgui_impl.ts
+++ b/src/imgui_impl.ts
@@ -78,11 +78,12 @@
         const R: number = draw_data.DisplayPos.x + draw_data.DisplaySize.x;
         const T: number = draw_data.DisplayPos.y;
         const B: number = draw_data.DisplayPos.y + draw_data.DisplaySize.y;
+        // we actually flip the bottom and top here to match with PIXI's texture usage
         const ortho_projection: Float32Array = new Float32Array([
             2.0 / (R - L),     0.0,                0.0, 0.0,
-            0.0,               2.0 / (T - B),      0.0, 0.0,
+            0.0,               2.0 / (B - T),      0.0, 0.0,
             0.0,               0.0,               -1.0, 0.0,
-            (R + L) / (L - R), (T + B) / (B - T),  0.0, 1.0,
+            (R + L) / (L - R), (B + T) / (T - B),  0.0, 1.0,
         ]);
         gl && gl.useProgram(g_ShaderHandle);
         gl && gl.uniform1i(g_AttribLocationTex, 0);