Mercurial > sdl-ios-xcode
annotate docs/man3/SDL_CDOpen.3 @ 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 | e5bc29de3f0a |
children | 546f7c1eb755 |
rev | line source |
---|---|
181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
1 .TH "SDL_CDOpen" "3" "Tue 11 Sep 2001, 22:58" "SDL" "SDL API Reference" |
0 | 2 .SH "NAME" |
3 SDL_CDOpen\- Opens a CD-ROM drive for access\&. | |
4 .SH "SYNOPSIS" | |
5 .PP | |
6 \fB#include "SDL\&.h" | |
7 .sp | |
8 \fBSDL_CD *\fBSDL_CDOpen\fP\fR(\fBint drive\fR); | |
9 .SH "DESCRIPTION" | |
10 .PP | |
11 Opens a CD-ROM drive for access\&. It returns a \fI\fBSDL_CD\fR\fR structure on success, or \fBNULL\fP if the drive was invalid or busy\&. This newly opened CD-ROM becomes the default CD used when other CD functions are passed a \fBNULL\fP CD-ROM handle\&. | |
12 .PP | |
13 Drives are numbered starting with 0\&. Drive 0 is the system default CD-ROM\&. | |
14 .SH "EXAMPLES" | |
15 .PP | |
16 .nf | |
17 \f(CWSDL_CD *cdrom; | |
18 int cur_track; | |
19 int min, sec, frame; | |
20 SDL_Init(SDL_INIT_CDROM); | |
21 atexit(SDL_Quit); | |
22 | |
23 /* Check for CD drives */ | |
24 if(!SDL_CDNumDrives()){ | |
25 /* None found */ | |
26 fprintf(stderr, "No CDROM devices available | |
27 "); | |
28 exit(-1); | |
29 } | |
30 | |
31 /* Open the default drive */ | |
32 cdrom=SDL_CDOpen(0); | |
33 | |
34 /* Did if open? Check if cdrom is NULL */ | |
35 if(!cdrom){ | |
36 fprintf(stderr, "Couldn\&'t open drive: %s | |
37 ", SDL_GetError()); | |
38 exit(-1); | |
39 } | |
40 | |
41 /* Print Volume info */ | |
42 printf("Name: %s | |
43 ", SDL_CDName(0)); | |
44 printf("Tracks: %d | |
45 ", cdrom->numtracks); | |
46 for(cur_track=0;cur_track < cdrom->numtracks; cur_track++){ | |
47 FRAMES_TO_MSF(cdrom->track[cur_track]\&.length, &min, &sec, &frame); | |
48 printf(" Track %d: Length %d:%d | |
49 ", cur_track, min, sec); | |
50 } | |
51 | |
52 SDL_CDClose(cdrom);\fR | |
53 .fi | |
54 .PP | |
55 .SH "SEE ALSO" | |
56 .PP | |
57 \fI\fBSDL_CD\fR\fR, \fI\fBSDL_CDtrack\fR\fR, \fI\fBSDL_CDClose\fP\fR | |
181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
58 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:58 |