Fixed bug #61 Date: Mon, 24 Feb 2003 13:35:11 +0800 From: "Leonidas" Subject: [SDL] Re: Trigger mouse wheel event -- not in X-environment I have looked into the codes for the IMPS/2 mouse wheel mode of fbcon driver. But I found something weird. Here's the original codes to set a mouse device into IMPS/2 mode in libSDL. In the file src/video/fbcon/SDL_fbevents.c In function static int set_imps2_mode(int fd) ... Uint8 set_imps2[] = {0xf3, 200, 0xf3, 100, 0xf3, 80}; Uint8 reset = 0xff; fd_set fdset; struct timeval tv; int retval = 0; // Set mouse device fd into IMPS/2 mode if ( write(fd, &set_imps2, sizeof(set_imps2)) == sizeof(set_imps2) ) { // ??? then RESET it..??? if (write(fd, &reset, sizeof (reset)) == sizeof (reset) ) { retval = 1; } } ........... Since it sets IMPS/2 mode then reset it, so you will never get a mouse into IMPS/2 mode to use its wheel. What I did to make the wheel usable is remove the RESET codes. .... if ( write(fd, &set_imps2, sizeof(set_imps2)) == sizeof(set_imps2) ) { /* if (write(fd, &reset, sizeof (reset)) == sizeof (reset) ) { } */ retval = 1; } .... And in FB_OpenMouse(_THIS) Make the device /dev/psaux to be setted into imps2 mode such that it can be detected its a imps/2 mouse or not. (my mouse device is on ps2, but the codes only set /dev/input/mice device originally) Then I have done, I can use the mouse wheel when SDL uses frame buff driver. I dont exactly know I did right or wrong, I just change it for my usuage. Correct me please, if I did something wrong. Best regards, Li Tsung Lin IAP Product Dept. Engineer EeRise Corp. (Image Processing System, Computer Vision System) Hsin Tien, Taipei Hsien, Taiwan, R.O.C.

.TH "SDL_GLattr" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" 
.SH "NAME"
SDL_GLattr\- SDL GL Attributes
.SH "ATTRIBUTES"
.TP 20
\fBSDL_GL_RED_SIZE\fP
Size of the framebuffer red component, in bits
.TP 20
\fBSDL_GL_GREEN_SIZE\fP
Size of the framebuffer green component, in bits
.TP 20
\fBSDL_GL_BLUE_SIZE\fP
Size of the framebuffer blue component, in bits
.TP 20
\fBSDL_GL_ALPHA_SIZE\fP
Size of the framebuffer alpha component, in bits
.TP 20
\fBSDL_GL_DOUBLEBUFFER\fP
0 or 1, enable or disable double buffering
.TP 20
\fBSDL_GL_BUFFER_SIZE\fP
Size of the framebuffer, in bits
.TP 20
\fBSDL_GL_DEPTH_SIZE\fP
Size of the depth buffer, in bits
.TP 20
\fBSDL_GL_STENCIL_SIZE\fP
Size of the stencil buffer, in bits
.TP 20
\fBSDL_GL_ACCUM_RED_SIZE\fP
Size of the accumulation buffer red component, in bits
.TP 20
\fBSDL_GL_ACCUM_GREEN_SIZE\fP
Size of the accumulation buffer green component, in bits
.TP 20
\fBSDL_GL_ACCUM_BLUE_SIZE\fP
Size of the accumulation buffer blue component, in bits
.TP 20
\fBSDL_GL_ACCUM_ALPHA_SIZE\fP
Size of the accumulation buffer alpha component, in bits
.SH "DESCRIPTION"
.PP
While you can set most OpenGL attributes normally, the attributes list above must be known \fIbefore\fP SDL sets the video mode\&. These attributes a set and read with \fI\fBSDL_GL_SetAttribute\fP\fR and \fI\fBSDL_GL_GetAttribute\fP\fR\&.
.SH "SEE ALSO"
.PP
\fI\fBSDL_GL_SetAttribute\fP\fR, \fI\fBSDL_GL_GetAttribute\fP\fR
...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01