From a93a2273d1f60c4bd489a3213add01f263d32aae Mon Sep 17 00:00:00 2001
From: UnknownShadow200 <unknownshadow200@gmail.com>
Date: Thu, 30 Sep 2021 18:18:04 +1000
Subject: [PATCH] Add OpenGL ES 1.1 support which might be broken

---
 src/Graphics_GL.c | 10 +++++++++-
 src/_WindowBase.h |  9 ++++++++-
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/src/Graphics_GL.c b/src/Graphics_GL.c
index 66ff1578b..0a381d14c 100644
--- a/src/Graphics_GL.c
+++ b/src/Graphics_GL.c
@@ -23,8 +23,10 @@
 #include <OpenGLES/ES2/gl.h>
 #elif defined CC_BUILD_MACOS
 #include <OpenGL/gl.h>
-#elif defined CC_BUILD_GLES
+#elif defined CC_BUILD_GLES && defined CC_BUILD_GLMODERN
 #include <GLES2/gl2.h>
+#elif defined CC_BUILD_GLES
+#include <GLES/gl.h>
 #else
 #define GL_GLEXT_PROTOTYPES
 #include <GL/gl.h>
@@ -971,7 +973,13 @@ void Gfx_SetFogMode(FogFunc func) {
 	static GLint modes[3] = { GL_LINEAR, GL_EXP, GL_EXP2 };
 	if (func == gfx_fogMode) return;
 
+#ifdef CC_BUILD_GLES
+	/* OpenGL ES doesn't support glFogi, so use glFogf instead */
+	/*  https://www.khronos.org/registry/OpenGL-Refpages/es1.1/xhtml/ */
+	glFogf(GL_FOG_MODE, modes[func]);
+#else
 	glFogi(GL_FOG_MODE, modes[func]);
+#endif
 	gfx_fogMode = func;
 }
 
diff --git a/src/_WindowBase.h b/src/_WindowBase.h
index c131cd0dd..7da5177f1 100644
--- a/src/_WindowBase.h
+++ b/src/_WindowBase.h
@@ -143,8 +143,15 @@ void GLContext_Create(void) {
 		EGL_DEPTH_SIZE,        GLCONTEXT_DEFAULT_DEPTH,
 		EGL_STENCIL_SIZE,      0,
 		EGL_COLOR_BUFFER_TYPE, EGL_RGB_BUFFER,
-		EGL_RENDERABLE_TYPE,   EGL_OPENGL_ES2_BIT,
 		EGL_SURFACE_TYPE,      EGL_WINDOW_BIT,
+
+#if defined CC_BUILD_GLES && defined CC_BUILD_GLMODERN
+		EGL_RENDERABLE_TYPE,   EGL_OPENGL_ES2_BIT,
+#elif defined CC_BUILD_GLES
+		EGL_RENDERABLE_TYPE,   EGL_OPENGL_ES_BIT,
+#else
+		#error "Can't determine appropriate EGL_RENDERABLE_TYPE"
+#endif
 		EGL_NONE
 	};