Initial commit

graphics/opengl/debug.h

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+/* 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef BACKENDS_GRAPHICS_OPENGL_DEBUG_H
+#define BACKENDS_GRAPHICS_OPENGL_DEBUG_H
+
+#include "graphics/opengl/context.h"
+
+#ifndef __EMSCRIPTEN__
+#define OPENGL_DEBUG
+#endif
+
+namespace OpenGL {
+void clearGLError();
+bool checkGLError(const char *expr, const char *file, int line);
+} // End of namespace OpenGL
+
+#define GL_WRAP_CHECK(err, call, name) do { OpenGL::clearGLError(); (call); err = OpenGL::checkGLError(#name, __FILE__, __LINE__); } while (false)
+#ifdef OPENGL_DEBUG
+#define GL_WRAP_DEBUG(call, name) do { OpenGL::clearGLError(); (call); OpenGL::checkGLError(#name, __FILE__, __LINE__); } while (false)
+#else
+#define GL_WRAP_DEBUG(call, name) do { (call); } while (false)
+#endif
+
+// This macro will set boolean err to true if there was an error and display them in the console
+#define GL_CALL_CHECK(err, x)      GL_WRAP_CHECK(err, x, x)
+// This macro will check for errors and display them in the console only when OPENGL_DEBUG is enabled
+#define GL_CALL(x)                 GL_WRAP_DEBUG(x, x)
+// This macro will execute the call only when the context is valid and will check errors only when OPENGL_DEBUG is enabled
+#define GL_CALL_SAFE(func, params) \
+	do { \
+		if (OpenGLContext.type != kContextNone) { \
+			GL_CALL(func params); \
+		} \
+	} while (0)
+// This macro will assign result of x to var and check for errors when OPENGL_DEBUG is enabled
+#define GL_ASSIGN(var, x)          GL_WRAP_DEBUG(var = x, x)
+
+#endif