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-rw-r--r--src/resources/image.h2
-rw-r--r--src/resources/openglimagehelper.h2
-rw-r--r--src/resources/subimage.h2
3 files changed, 6 insertions, 0 deletions
diff --git a/src/resources/image.h b/src/resources/image.h
index a40f62dee..7cdb1b5b3 100644
--- a/src/resources/image.h
+++ b/src/resources/image.h
@@ -35,7 +35,9 @@
#ifdef ANDROID
#include <GLES/gl.h>
#else
+#ifndef USE_SDL2
#define GL_GLEXT_PROTOTYPES 1
+#endif
#include <SDL_opengl.h>
#endif
#endif
diff --git a/src/resources/openglimagehelper.h b/src/resources/openglimagehelper.h
index e19c5e735..254edde9d 100644
--- a/src/resources/openglimagehelper.h
+++ b/src/resources/openglimagehelper.h
@@ -43,7 +43,9 @@
#include <GLES/gl.h>
#define GL_RGBA8 GL_RGBA8_OES
#else
+#ifndef USE_SDL2
#define GL_GLEXT_PROTOTYPES 1
+#endif
#include <SDL_opengl.h>
#endif
diff --git a/src/resources/subimage.h b/src/resources/subimage.h
index 5322f9a71..d61d47eb4 100644
--- a/src/resources/subimage.h
+++ b/src/resources/subimage.h
@@ -33,7 +33,9 @@
#ifdef ANDROID
#include <GLES/gl.h>
#else
+#ifndef USE_SDL2
#define GL_GLEXT_PROTOTYPES 1
+#endif
#include <SDL_opengl.h>
#endif