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view src/video/Xext/extensions/xme.h @ 2359:b70b96e615d2 gsoc2008_iphone

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These files are the OpenGL ES render driver. You should be able to use them on any platform that supports OpenGL ES -- not just iPhone. The driver is based off the OpenGL render driver. There are a few differences between OpenGL and OpenGL ES that present difficulties for this driver: - OpenGL ES does NOT support many pixel formats (for example, no GL_BGR). Also, when using texture functions format and internalFormat must be the same -- this means 32 bit packed formats like SDL_PIXELFORMAT_BGR888 cannot be automatically converted to GL_RGB (which is 24bpp). - OpenGL ES doesn't have GL_PACK_ROW_LENGTH, which means data must be reformatted before uploading changes to dirty rects. This change has been added. - OpenGL ES doesn't support paletted textures, though there is an extension. I'm looking into this. Some other notable differences: - OpenGL ES has an extension called GL_OES_draw_texture which allows for quicker 2D sprite-type drawing. I use this in GL_RenderCopy when it is available. The iPhone supports the extension, but the iPhone Simulator does not (presently). - No glBegin() / glEnd() and no GL_QUADS! I'm using glDrawArrays with GL_TRIANGLE_STRIP instead!
author Holmes Futrell <hfutrell@umail.ucsb.edu>
date Thu, 17 Jul 2008 23:31:42 +0000
parents dea73e1d07b0
children
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/*
 * Copyright 1993-2001 by Xi Graphics, Inc.
 * All Rights Reserved.
 *
 * Please see the LICENSE file accompanying this distribution for licensing 
 * information. 
 *
 * Please send any bug fixes and modifications to src@xig.com.
 *
 * $XiGId: xme.h,v 1.1.1.1 2001/11/19 19:01:10 jon Exp $
 *
 */


#ifndef _XME_H_INCLUDED
#define _XME_H_INCLUDED

typedef struct
{
    short x;
    short y;
    unsigned short w;
    unsigned short h;
} XiGMiscViewInfo;

typedef struct
{
    unsigned short width;
    unsigned short height;
    int refresh;
} XiGMiscResolutionInfo;

extern Bool XiGMiscQueryVersion(Display * dpy, int *major, int *minor);
extern int XiGMiscQueryViews(Display * dpy, int screen,
                             XiGMiscViewInfo ** pviews);
extern int XiGMiscQueryResolutions(Display * dpy, int screen, int view,
                                   int *pactive,
                                   XiGMiscResolutionInfo ** presolutions);
extern void XiGMiscChangeResolution(Display * dpy, int screen, int view,
                                    int width, int height, int refresh);

/* SDL addition from Ryan: free memory used by xme. */
extern void XiGMiscDestroy(void);

#endif /* _XME_H_INCLUDED */
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