(Said Max Horn on the SDL mailing list...) Hi folks, based on Eric Wing's patch, I created the attached patch which fixes the OpenGL coordinate inversion bug in SDL. It works fine over here on 10.3 with Ryan's test program (which I also attached). There is another change in it: I removed the "- 1" in the two lines using CGDisplayPixelsHigh()... while I understand from a logical point of view why they *should* be correct, I checked the actual values computed that way, and they were off-by-one. After removing the " - 1", the returned mouse coordinates are correct. I checked this by moving the mouse to the screen top/bottom in fullscreen mode, BTW. With the change, the proper values 0 and 479 are returned (in 640x480 mode). Sam, you may still want to test on 10.1, it's very simple using Ryan's minimal test code :-) Cheers, Max (Here is the reproduction case for revision history's sake...) /* * To compile: * gcc -o test test.c `sdl-config --cflags` `sdl-config --libs` -framework OpenGL * * --ryan. */ #include <stdio.h> #include "SDL.h" #include "SDL_opengl.h" int main(int argc, char **argv) { Uint32 flags = SDL_OPENGL /* | SDL_FULLSCREEN */; SDL_Surface *screen; SDL_Event event; int done = 0; GLfloat ratio; SDL_Init(SDL_INIT_VIDEO); SDL_ShowCursor(0); if ((argv[1]) && (strcmp(argv[1], "--grab") == 0)) SDL_WM_GrabInput(SDL_GRAB_ON); screen = SDL_SetVideoMode(640, 480, 0, flags); if (!screen) return(42); ratio = ((GLfloat) screen->w) / ((GLfloat) screen->h); glClearColor( 0.0f, 0.0f, 0.0f, 0.0f ); glClearDepth( 1.0f ); glEnable( GL_DEPTH_TEST ); glDepthFunc( GL_LEQUAL ); glViewport( 0, 0, screen->w, screen->h); glMatrixMode( GL_PROJECTION ); glLoadIdentity(); gluPerspective( 45.0f, ratio, 0.1f, 100.0f ); glMatrixMode( GL_MODELVIEW ); glLoadIdentity(); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); SDL_GL_SwapBuffers(); // eh, close enough. #define MAX_X 6.12 #define MAX_Y 4.50 while (!done) { int x, y; GLfloat glx, gly; if (!SDL_WaitEvent(&event)) break; switch (event.type) { case SDL_KEYUP: if (event.key.keysym.sym == SDLK_ESCAPE) done = 1; break; } SDL_GetMouseState(&x, &y); glx = ((((GLfloat) x) / ((GLfloat) screen->w)) - 0.5f) * MAX_X; gly = ((((GLfloat) y) / ((GLfloat) screen->h)) - 0.5f) * MAX_Y; glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); glTranslatef(glx,-gly,-6.0f); glBegin(GL_TRIANGLES); glColor3f(1,0,0); glVertex3f( 0.00f, 0.25f, 0.00f); glColor3f(0,1,0); glVertex3f(-0.25f, -0.25f, 0.00f); glColor3f(0,0,1); glVertex3f( 0.25f, -0.25f, 0.00f); glEnd(); SDL_GL_SwapBuffers(); } SDL_Quit(); return(0); } /* end of test.c ... */

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2004 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@libsdl.org
*/

/*
	STFA control structure

	Patrice Mandin
*/

#ifndef _SDL_mintaudio_stfa_h
#define _SDL_mintaudio_stfa_h

/*--- Defines ---*/

#define C_STFA	0x53544641L	/* Sound treiber für atari (seb/The removers) */

#define STFA_PLAY_ENABLE	(1<<0)
#define STFA_PLAY_DISABLE	(0<<0)
#define STFA_PLAY_REPEAT	(1<<1)
#define STFA_PLAY_SINGLE	(0<<1)

#define STFA_FORMAT_SIGNED		(1<<15)
#define STFA_FORMAT_UNSIGNED	(0<<15)
#define STFA_FORMAT_STEREO		(1<<14)
#define STFA_FORMAT_MONO		(0<<14)
#define STFA_FORMAT_16BIT		(1<<13)
#define STFA_FORMAT_8BIT		(0<<13)
#define STFA_FORMAT_LITENDIAN	(1<<9)
#define STFA_FORMAT_BIGENDIAN	(0<<9)
#define STFA_FORMAT_FREQ_MASK	0x0f
enum {
	STFA_FORMAT_F4995=0,
	STFA_FORMAT_F6269,
	STFA_FORMAT_F7493,
	STFA_FORMAT_F8192,

	STFA_FORMAT_F9830,
	STFA_FORMAT_F10971,
	STFA_FORMAT_F12538,
	STFA_FORMAT_F14985,

	STFA_FORMAT_F16384,
	STFA_FORMAT_F19819,
	STFA_FORMAT_F21943,
	STFA_FORMAT_F24576,

	STFA_FORMAT_F30720,
	STFA_FORMAT_F32336,
	STFA_FORMAT_F43885,
	STFA_FORMAT_F49152
};

/*--- Types ---*/

typedef struct {
	unsigned short sound_enable;
	unsigned short sound_control;
	unsigned short sound_output;
	unsigned long sound_start;
	unsigned long sound_current;
	unsigned long sound_end;
	unsigned short version;
	void *old_vbl;
	void *old_timera;
	unsigned long old_mfp_status;
	void *new_vbl;
	void *drivers_list;
	void *play_stop;
	unsigned short frequency;
	void *set_frequency;
	
	unsigned short frequency_threshold;
	unsigned short *custom_freq_table;
	unsigned short stfa_on_off;
	void *new_drivers_list;
	unsigned long old_bit_2_of_cookie_snd;
	void (*stfa_it)(void);
} cookie_stfa_t __attribute__((packed));

#endif /* _SDL_mintaudio_stfa_h */