From 91c3b66d735d5f560d1ef92a7ad1ab3849615659 Mon Sep 17 00:00:00 2001
From: Luke Benstead <kazade@gmail.com>
Date: Sun, 10 Mar 2019 12:30:39 +0000
Subject: [PATCH] Add GL_MODELVIEW_MATRIX as an option to glGetFloatv

---
 GL/matrix.c  | 4 ++++
 GL/private.h | 1 +
 GL/state.c   | 3 +++
 3 files changed, 8 insertions(+)

diff --git a/GL/matrix.c b/GL/matrix.c
index 5fc2d9e..36f1455 100644
--- a/GL/matrix.c
+++ b/GL/matrix.c
@@ -37,6 +37,10 @@ matrix_t* _glGetProjectionMatrix() {
     return (matrix_t*) stack_top(&MATRIX_STACKS[1]);
 }
 
+matrix_t* _glGetModelViewMatrix() {
+    return (matrix_t*) stack_top(&MATRIX_STACKS[0]);
+}
+
 void _glInitMatrices() {
     init_stack(&MATRIX_STACKS[0], sizeof(matrix_t), 32);
     init_stack(&MATRIX_STACKS[1], sizeof(matrix_t), 32);
diff --git a/GL/private.h b/GL/private.h
index ebae279..e7258fe 100644
--- a/GL/private.h
+++ b/GL/private.h
@@ -114,6 +114,7 @@ void _glMatrixLoadTexture();
 void _glApplyRenderMatrix();
 
 matrix_t* _glGetProjectionMatrix();
+matrix_t* _glGetModelViewMatrix();
 
 void _glWipeTextureOnFramebuffers(GLuint texture);
 GLubyte _glCheckImmediateModeInactive(const char* func);
diff --git a/GL/state.c b/GL/state.c
index 7109b87..879c7e0 100644
--- a/GL/state.c
+++ b/GL/state.c
@@ -580,6 +580,9 @@ void APIENTRY glGetFloatv(GLenum pname, GLfloat* params) {
         case GL_PROJECTION_MATRIX:
             memcpy(params, _glGetProjectionMatrix(), sizeof(float) * 16);
         break;
+        case GL_MODELVIEW_MATRIX:
+            memcpy(params, _glGetModelViewMatrix(), sizeof(float) * 16);
+        break;
         default:
             _glKosThrowError(GL_INVALID_ENUM, "glGetIntegerv");
             _glKosPrintError();