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fb_sdl: check for X11 / prevent invalid-event flood

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We check for X11 as required platform now and are more verbose on
errors.
This commit is contained in:
Christian Helmuth 2015-10-08 17:12:25 +02:00
parent 826c81ac18
commit 64a4713fe6
2 changed files with 55 additions and 12 deletions
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24
repos/os/src/drivers/framebuffer/spec/sdl/fb_sdl.cc
View File

@ -1,11 +1,12 @@
/*
* \brief SDL-based implementation of the Genode framebuffer
* \author Norman Feske
* \author Christian Helmuth
* \date 2006-07-10
*/
/*
* Copyright (C) 2006-2013 Genode Labs GmbH
* Copyright (C) 2006-2015 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
@ -119,7 +120,7 @@ class Framebuffer::Session_component : public Genode::Rpc_object<Session>
/**
* Main program
*/
extern "C" int main(int, char**)
int main()
{
using namespace Genode;
using namespace Framebuffer;
@ -132,12 +133,27 @@ extern "C" int main(int, char**)
*/
if (SDL_Init(SDL_INIT_VIDEO) < 0)
{
PERR("SDL_Init failed\n");
PERR("SDL_Init failed (%s)", SDL_GetError());
return -1;
}
/*
* We're testing only X11.
*/
static char driver[16] = { 0 };
SDL_VideoDriverName(driver, sizeof(driver));
if (::strcmp(driver, "x11") != 0) {
PERR("fb_sdl works on X11 only. Your SDL backend is \"%s\".", driver);
return -2;
}
Genode::size_t bpp = Framebuffer::Mode::bytes_per_pixel(scr_format);
screen = SDL_SetVideoMode(scr_width, scr_height, bpp*8, SDL_SWSURFACE);
if (!screen) {
PERR("SDL_SetVideoMode failed (%s)", SDL_GetError());
return -3;
}
SDL_ShowCursor(0);
Genode::printf("creating virtual framebuffer for mode %ldx%ld@%zd\n",
@ -152,7 +168,7 @@ extern "C" int main(int, char**)
fb_ds_addr = fb_ds.local_addr<void>();
} catch (...) {
PERR("Could not allocate dataspace for virtual frame buffer");
return -2;
return -4;
}
/*

43
repos/os/src/drivers/framebuffer/spec/sdl/input.cc
View File

@ -1,11 +1,12 @@
/*
* \brief SDL input support
* \author Norman Feske
* \author Christian Helmuth
* \date 2006-08-16
*/
/*
* Copyright (C) 2006-2013 Genode Labs GmbH
* Copyright (C) 2006-2015 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
@ -138,7 +139,7 @@ static long convert_keycode(int sdl_keycode)
};
Input::Event wait_for_event()
static Input::Event wait_for_sdl_event()
{
using namespace Input;
@ -166,18 +167,30 @@ Input::Event wait_for_event()
case SDL_MOUSEBUTTONUP:
switch (event.button.button) {
case SDL_BUTTON_LEFT: keycode = BTN_LEFT; break;
case SDL_BUTTON_RIGHT: keycode = BTN_RIGHT; break;
default: keycode = 0;
case SDL_BUTTON_LEFT: keycode = BTN_LEFT; break;
case SDL_BUTTON_MIDDLE: keycode = BTN_MIDDLE; break;
case SDL_BUTTON_RIGHT: keycode = BTN_RIGHT; break;
default: keycode = 0;
}
}
/* determine event type */
Event::Type type;
switch (event.type) {
case SDL_MOUSEMOTION: type = Event::MOTION; break;
case SDL_MOUSEMOTION:
type = Event::MOTION;
break;
case SDL_KEYUP:
case SDL_MOUSEBUTTONUP: type = Event::RELEASE; break;
case SDL_MOUSEBUTTONUP:
if (event.button.button == SDL_BUTTON_WHEELUP
|| event.button.button == SDL_BUTTON_WHEELDOWN)
/* ignore */
return Event();
type = Event::RELEASE;
break;
case SDL_KEYDOWN:
case SDL_MOUSEBUTTONDOWN:
if (event.button.button == SDL_BUTTON_WHEELUP) {
@ -189,8 +202,22 @@ Input::Event wait_for_event()
}
type = Event::PRESS;
break;
default: type = Event::INVALID;
default:
return Event();
}
return Event(type, keycode, mx, my, mx - ox, my - oy);
}
Input::Event wait_for_event()
{
Input::Event e;
/* prevent flooding of client with invalid events */
do {
e = wait_for_sdl_event();
} while (e.type() == Input::Event::INVALID);
return e;
}