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Fixed bug #61

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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.
This commit is contained in:
Sam Lantinga
2006-03-22 07:22:40 +00:00
parent aecc79b780
commit fd7f83dd28
1 changed files with 4 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/video/fbcon/SDL_fbevents.c
View File

@@ -420,9 +420,11 @@ static int set_imps2_mode(int fd)
int retval = 0;
if ( write(fd, &set_imps2, sizeof(set_imps2)) == sizeof(set_imps2) ) {
/* Don't reset it, that'll clear IMPS/2 mode on some mice
if (write(fd, &reset, sizeof (reset)) == sizeof (reset) ) {
retval = 1;
}
*/
}
/* Get rid of any chatter from the above */
@@ -545,7 +547,7 @@ fprintf(stderr, "Using ELO touchscreen\n");
if ( mousedev == NULL ) {
/* FIXME someday... allow multiple mice in this driver */
static const char * const ps2mice[] = {
static const char *ps2mice[] = {
"/dev/input/mice", "/dev/usbmouse", "/dev/psaux", NULL
};
/* First try to use GPM in repeater mode */
@@ -568,9 +570,7 @@ fprintf(stderr, "Using GPM mouse\n");
}
if (mouse_fd >= 0) {
/* rcg06112001 Attempt to set IMPS/2 mode */
if ( i == 0 ) {
set_imps2_mode(mouse_fd);
}
set_imps2_mode(mouse_fd);
if (detect_imps2(mouse_fd)) {
#ifdef DEBUG_MOUSE
fprintf(stderr, "Using IMPS2 mouse\n");