OPENGL: Add new generic OpenGL (ES) backend.

This backend is based on ideas of the old OpenGL backend, of the Android GL
backend and of the iPhone GL backend.

1 files changed, 48 insertions, 0 deletions

diff --git a/backends/graphics/opengl/extensions.cpp b/backends/graphics/opengl/extensions.cpp
new file mode 100644
index 0000000000..4482ef82b5
--- /dev/null
+++ b/backends/graphics/opengl/extensions.cpp
@@ -0,0 +1,48 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "backends/graphics/opengl/extensions.h"
+#include "backends/graphics/opengl/opengl-sys.h"
+
+#include "common/tokenizer.h"
+
+namespace OpenGL {
+
+bool g_extNPOTSupported = false;
+
+void initializeGLExtensions() {
+	const char *extString = (const char *)glGetString(GL_EXTENSIONS);
+
+	// Initialize default state.
+	g_extNPOTSupported = false;
+
+	Common::StringTokenizer tokenizer(extString, " ");
+	while (!tokenizer.empty()) {
+		Common::String token = tokenizer.nextToken();
+
+		if (token == "GL_ARB_texture_non_power_of_two") {
+			g_extNPOTSupported = true;
+		}
+	}
+}
+
+} // End of namespace OpenGL