From 0f2828da40baa52f72093ae231bd7e34dfbaed92 Mon Sep 17 00:00:00 2001
From: Will Toohey <will@mon.im>
Date: Mon, 3 Jan 2022 16:48:12 +1000
Subject: [PATCH] jbhook: make errors right-side-up as well

---
 src/main/jbhook-util/gfx.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/main/jbhook-util/gfx.c b/src/main/jbhook-util/gfx.c
index c55b1a6..c8c8c53 100644
--- a/src/main/jbhook-util/gfx.c
+++ b/src/main/jbhook-util/gfx.c
@@ -27,6 +27,8 @@ static void (__stdcall *real_glFlush)(void);
 static void hook_glBindFramebufferEXT(GLenum target, GLuint framebuffer);
 static void (*real_glBindFramebufferEXT)(GLenum target, GLuint framebuffer);
 
+static void hook_infodispcore_set_angle(void* this, int angle);
+
 static const struct hook_symbol jbhook1_opengl_hook_syms[] = {
     {.name = "glFlush",
      .patch = hook_glFlush,
@@ -39,6 +41,12 @@ static const struct hook_symbol jbhook1_glhelper_hook_syms[] = {
      .link = (void **) &real_glBindFramebufferEXT},
 };
 
+// on knit/copious, this gives us right-side-up errors, too!
+static const struct hook_symbol jbhook_infodisp_hook_syms[] = {
+    {.name = "?set_angle@infodispcore@@QAEXH@Z",
+     .patch = hook_infodispcore_set_angle},
+};
+
 static DWORD STDCALL my_GetGlyphOutline(
     HDC hdc,
     UINT uChar,
@@ -117,9 +125,19 @@ void jbhook_util_gfx_install_vertical_hooks(void) {
         jbhook1_glhelper_hook_syms,
         lengthof(jbhook1_glhelper_hook_syms));
 
+    hook_table_apply(
+        NULL,
+        "infodisp.dll",
+        jbhook_infodisp_hook_syms,
+        lengthof(jbhook_infodisp_hook_syms));
+
     log_info("Inserted vertical display hooks");
 }
 
+static void hook_infodispcore_set_angle(void* this, int angle) {
+    // ignore
+}
+
 // Welcome to OpenGL land! There is a ton of boilerplate needed here "just" to
 // rotate the render output