Mercurial > sdl-ios-xcode
view docs/html/Makefile.am @ 876:9e84d106ec19
(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 ... */
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Mon, 22 Mar 2004 09:38:20 +0000 |
| parents | 37f9aeebcbb4 |
| children |
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EXTRA_DIST = \ audio.html \ cdrom.html \ event.html \ eventfunctions.html \ eventstructures.html \ general.html \ guide.html \ guideaboutsdldoc.html \ guideaudioexamples.html \ guidebasicsinit.html \ guidecdromexamples.html \ guidecredits.html \ guideeventexamples.html \ guideexamples.html \ guideinput.html \ guideinputkeyboard.html \ guidepreface.html \ guidethebasics.html \ guidetimeexamples.html \ guidevideo.html \ guidevideoopengl.html \ index.html \ joystick.html \ reference.html \ sdlactiveevent.html \ sdladdtimer.html \ sdlaudiocvt.html \ sdlaudiospec.html \ sdlblitsurface.html \ sdlbuildaudiocvt.html \ sdlcd.html \ sdlcdclose.html \ sdlcdeject.html \ sdlcdname.html \ sdlcdnumdrives.html \ sdlcdopen.html \ sdlcdpause.html \ sdlcdplay.html \ sdlcdplaytracks.html \ sdlcdresume.html \ sdlcdstatus.html \ sdlcdstop.html \ sdlcdtrack.html \ sdlcloseaudio.html \ sdlcolor.html \ sdlcondbroadcast.html \ sdlcondsignal.html \ sdlcondwait.html \ sdlcondwaittimeout.html \ sdlconvertaudio.html \ sdlconvertsurface.html \ sdlcreatecond.html \ sdlcreatecursor.html \ sdlcreatemutex.html \ sdlcreatergbsurface.html \ sdlcreatergbsurfacefrom.html \ sdlcreatesemaphore.html \ sdlcreatethread.html \ sdlcreateyuvoverlay.html \ sdldelay.html \ sdldestroycond.html \ sdldestroymutex.html \ sdldestroysemaphore.html \ sdldisplayformat.html \ sdldisplayformatalpha.html \ sdldisplayyuvoverlay.html \ sdlenablekeyrepeat.html \ sdlenableunicode.html \ sdlenvvars.html \ sdlevent.html \ sdleventstate.html \ sdlexposeevent.html \ sdlfillrect.html \ sdlflip.html \ sdlfreecursor.html \ sdlfreesurface.html \ sdlfreewav.html \ sdlfreeyuvoverlay.html \ sdlgetappstate.html \ sdlgetaudiostatus.html \ sdlgetcliprect.html \ sdlgetcursor.html \ sdlgeterror.html \ sdlgeteventfilter.html \ sdlgetgammaramp.html \ sdlgetkeyname.html \ sdlgetkeystate.html \ sdlgetmodstate.html \ sdlgetmousestate.html \ sdlgetrelativemousestate.html \ sdlgetrgb.html \ sdlgetrgba.html \ sdlgetthreadid.html \ sdlgetticks.html \ sdlgetvideoinfo.html \ sdlgetvideosurface.html \ sdlglattr.html \ sdlglgetattribute.html \ sdlglgetprocaddress.html \ sdlglloadlibrary.html \ sdlglsetattribute.html \ sdlglswapbuffers.html \ sdlinit.html \ sdlinitsubsystem.html \ sdljoyaxisevent.html \ sdljoyballevent.html \ sdljoybuttonevent.html \ sdljoyhatevent.html \ sdljoystickclose.html \ sdljoystickeventstate.html \ sdljoystickgetaxis.html \ sdljoystickgetball.html \ sdljoystickgetbutton.html \ sdljoystickgethat.html \ sdljoystickindex.html \ sdljoystickname.html \ sdljoysticknumaxes.html \ sdljoysticknumballs.html \ sdljoysticknumbuttons.html \ sdljoysticknumhats.html \ sdljoystickopen.html \ sdljoystickopened.html \ sdljoystickupdate.html \ sdlkey.html \ sdlkeyboardevent.html \ sdlkeysym.html \ sdlkillthread.html \ sdllistmodes.html \ sdlloadbmp.html \ sdlloadwav.html \ sdllockaudio.html \ sdllocksurface.html \ sdllockyuvoverlay.html \ sdlmaprgb.html \ sdlmaprgba.html \ sdlmixaudio.html \ sdlmousebuttonevent.html \ sdlmousemotionevent.html \ sdlmutexp.html \ sdlmutexv.html \ sdlnumjoysticks.html \ sdlopenaudio.html \ sdloverlay.html \ sdlpalette.html \ sdlpauseaudio.html \ sdlpeepevents.html \ sdlpixelformat.html \ sdlpollevent.html \ sdlpumpevents.html \ sdlpushevent.html \ sdlquit.html \ sdlquitevent.html \ sdlquitsubsystem.html \ sdlrect.html \ sdlremovetimer.html \ sdlresizeevent.html \ sdlsavebmp.html \ sdlsempost.html \ sdlsemtrywait.html \ sdlsemvalue.html \ sdlsemwait.html \ sdlsemwaittimeout.html \ sdlsetalpha.html \ sdlsetcliprect.html \ sdlsetcolorkey.html \ sdlsetcolors.html \ sdlsetcursor.html \ sdlseteventfilter.html \ sdlsetgamma.html \ sdlsetgammaramp.html \ sdlsetmodstate.html \ sdlsetpalette.html \ sdlsettimer.html \ sdlsetvideomode.html \ sdlshowcursor.html \ sdlsurface.html \ sdlsyswmevent.html \ sdlthreadid.html \ sdlunlockaudio.html \ sdlunlocksurface.html \ sdlunlockyuvoverlay.html \ sdlupdaterect.html \ sdlupdaterects.html \ sdluserevent.html \ sdlvideodrivername.html \ sdlvideoinfo.html \ sdlvideomodeok.html \ sdlwaitevent.html \ sdlwaitthread.html \ sdlwarpmouse.html \ sdlwasinit.html \ sdlwmgetcaption.html \ sdlwmgrabinput.html \ sdlwmiconifywindow.html \ sdlwmsetcaption.html \ sdlwmseticon.html \ sdlwmtogglefullscreen.html \ thread.html \ time.html \ video.html \ wm.html