support for GLES2

[gltest.git] / glutil_gl1.cpp

diff --git a/glutil_gl1.cpp b/glutil_gl1.cpp
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+++ b/glutil_gl1.cpp
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+/* gltest - small OpenGL tearing test program
+ * Copyright (C) 2012-2013 Ralf Jung <post@ralfj.de>
+ *
+ * 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 "glutil.h"
+
+// initialisation
+void initialise2dProjection()
+{
+       glMatrixMode(GL_PROJECTION);
+       glLoadIdentity();
+       glOrtho (0, 1, 1, 0, 0, 1);
+       glMatrixMode(GL_MODELVIEW);
+}
+
+// draw a quad
+void drawQuad(GLfloat red, GLfloat green, GLfloat blue, GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2)
+{
+       glBegin(GL_QUADS);
+       glColor3f(red, green, blue);
+       glVertex2f(x1, y1);
+       glVertex2f(x2, y1);
+       glVertex2f(x2, y2);
+       glVertex2f(x1, y2);
+       glEnd();
+}
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