From b6585c2d8b1531766b814201130c96da9070211f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fredrik=20H=C3=B6glund?= <fredrik@kde.org>
Date: Wed, 26 Sep 2012 23:27:18 +0200
Subject: [PATCH] kwin/es: Resolve functions for GL_OES_mapbuffer

---
 libkwineffects/kwinglutils_funcs.cpp | 24 ++++++++++++++++++++++--
 libkwineffects/kwinglutils_funcs.h   | 14 ++++++++++++++
 2 files changed, 36 insertions(+), 2 deletions(-)

diff --git a/libkwineffects/kwinglutils_funcs.cpp b/libkwineffects/kwinglutils_funcs.cpp
index 26d44340ea..13dc17509e 100644
--- a/libkwineffects/kwinglutils_funcs.cpp
+++ b/libkwineffects/kwinglutils_funcs.cpp
@@ -243,9 +243,15 @@ void glxResolveFunctions()
     else
         glXCreateContextAttribsARB = NULL;
 }
-#endif
 
+#else
 
+// GL_OES_mapbuffer
+glMapBuffer_func         glMapBuffer;
+glUnmapBuffer_func       glUnmapBuffer;
+glGetBufferPointerv_func glGetBufferPointerv;
+
+#endif // KWIN_HAVE_OPENGLES
 
 #ifdef KWIN_HAVE_EGL
 
@@ -656,7 +662,21 @@ void glResolveFunctions(OpenGLPlatformInterface platformInterface)
         glMapBufferRange         = NULL;
         glFlushMappedBufferRange = NULL;
     }
-#endif
+
+#else
+
+    if (hasGLExtension("GL_OES_mapbuffer")) {
+        // See http://www.khronos.org/registry/gles/extensions/OES/OES_mapbuffer.txt
+        glMapBuffer         = (glMapBuffer_func)         eglGetProcAddress("glMapBufferOES");
+        glUnmapBuffer       = (glUnmapBuffer_func)       eglGetProcAddress("glUnmapBufferOES");
+        glGetBufferPointerv = (glGetBufferPointerv_func) eglGetProcAddress("glGetBufferPointervOES");
+    } else {
+        glMapBuffer         = NULL;
+        glUnmapBuffer       = NULL;
+        glGetBufferPointerv = NULL;
+    }
+
+#endif // KWIN_HAVE_OPENGLES
 
 #ifdef KWIN_HAVE_EGL
     if (platformInterface == EglPlatformInterface) {
diff --git a/libkwineffects/kwinglutils_funcs.h b/libkwineffects/kwinglutils_funcs.h
index 68d7468541..02d7da8510 100644
--- a/libkwineffects/kwinglutils_funcs.h
+++ b/libkwineffects/kwinglutils_funcs.h
@@ -509,6 +509,20 @@ extern KWIN_EXPORT eglPostSubBufferNV_func eglPostSubBufferNV;
 typedef GLvoid(*glEGLImageTargetTexture2DOES_func)(GLenum, GLeglImageOES);
 extern KWIN_EXPORT glEGLImageTargetTexture2DOES_func glEGLImageTargetTexture2DOES;
 
+
+#ifdef KWIN_HAVE_OPENGLES
+
+// GL_OES_mapbuffer
+typedef GLvoid *(*glMapBuffer_func)(GLenum target, GLenum access);
+typedef GLboolean (*glUnmapBuffer_func)(GLenum target);
+typedef void (*glGetBufferPointerv_func)(GLenum target, GLenum pname, GLvoid **params);
+
+extern KWIN_EXPORT glMapBuffer_func         glMapBuffer;
+extern KWIN_EXPORT glUnmapBuffer_func       glUnmapBuffer;
+extern KWIN_EXPORT glGetBufferPointerv_func glGetBufferPointerv;
+
+#endif // KWIN_HAVE_OPENGLES
+
 } // namespace
 
 #endif // KWIN_HAVE_EGL