1 files changed, 115 insertions, 0 deletions
diff --git a/backends/graphics/opengl/gltexture.h b/backends/graphics/opengl/gltexture.h
new file mode 100644
index 0000000000..9864f6816c
--- /dev/null
+++ b/backends/graphics/opengl/gltexture.h
@@ -0,0 +1,115 @@
+/* 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifdef WIN32
+#if defined(ARRAYSIZE) && !defined(_WINDOWS_)
+#undef ARRAYSIZE
+#endif
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#undef ARRAYSIZE
+#endif
+
+#if defined(USE_GLES)
+#include <GLES/gl.h>
+#include <GLES/glext.h>
+#elif defined(MACOSX)
+#include <gl.h>
+#include <glext.h>
+#else
+#include <GL/gl.h>
+#include <GL/glext.h>
+#endif
+
+#include "graphics/surface.h"
+
+#include "common/rect.h"
+#include "common/array.h"
+
+/**
+ * OpenGL texture manager class
+ */
+class GLTexture {
+public:
+	/**
+	 * Initialize OpenGL Extensions
+	 */
+	static void initGLExtensions();
+
+	GLTexture(byte bpp, GLenum internalFormat, GLenum format, GLenum type);
+	virtual ~GLTexture();
+
+	/**
+	 * Refresh the texture after a context change. The
+	 * process will be completed on next allocBuffer call.
+	 */
+	virtual void refresh();
+
+	/**
+	 * Allocates memory needed for the given size.
+	 */
+	virtual void allocBuffer(GLuint width, GLuint height);
+
+	/**
+	 * Updates the texture pixels.
+	 */
+	virtual void updateBuffer(const void *buf, int pitch, GLuint x, GLuint y,
+		GLuint w, GLuint h);
+
+	/**
+	 * Draws the texture to the screen buffer.
+	 */
+	virtual void drawTexture(GLshort x, GLshort y, GLshort w, GLshort h);
+
+	/**
+	 * Get the texture width.
+	 */
+	GLuint getWidth() const { return _realWidth; }
+
+	/**
+	 * Get the texture height.
+	 */
+	GLuint getHeight() const { return _realHeight; }
+
+	/**
+	 * Set the texture filter.
+	 * @filter the filter type, GL_NEAREST or GL_LINEAR
+	 */
+	void setFilter(GLint filter) { _filter = filter; }
+
+protected:
+	const byte _bytesPerPixel;
+	const GLenum _internalFormat;
+	const GLenum _glFormat;
+	const GLenum _glType;
+
+	GLuint _realWidth;
+	GLuint _realHeight;
+	GLuint _textureName;
+	GLuint _textureWidth;
+	GLuint _textureHeight;
+	GLint _filter;
+	bool _refresh;
+};