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trezor-firmware/embed/unix/touch.c

85 lines
2.9 KiB
C

/*
* This file is part of the TREZOR project, https://trezor.io/
*
* Copyright (c) SatoshiLabs
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#ifndef TREZOR_NOUI
#include <SDL2/SDL.h>
#endif
#include "touch.h"
extern int sdl_display_res_x, sdl_display_res_y;
extern int sdl_touch_offset_x, sdl_touch_offset_y;
extern void __shutdown(void);
extern void display_save(const char *prefix);
uint32_t touch_read(void)
{
#ifndef TREZOR_NOUI
SDL_Event event;
int x, y;
SDL_PumpEvents();
if (SDL_PollEvent(&event) > 0) {
switch (event.type) {
case SDL_MOUSEBUTTONDOWN:
case SDL_MOUSEMOTION:
case SDL_MOUSEBUTTONUP:
x = event.button.x - sdl_touch_offset_x;
y = event.button.y - sdl_touch_offset_y;
if (x < 0 || y < 0 || x >= sdl_display_res_x || y >= sdl_display_res_y) {
if (event.motion.state) {
int clamp_x = (x < 0) ? 0 : ((x >= sdl_display_res_x) ? sdl_display_res_x - 1 : x);
int clamp_y = (y < 0) ? 0 : ((y >= sdl_display_res_y) ? sdl_display_res_y - 1 : y);
return TOUCH_END | touch_pack_xy(clamp_x, clamp_y);
} else {
break;
}
}
switch (event.type) {
case SDL_MOUSEBUTTONDOWN:
return TOUCH_START | touch_pack_xy(x, y);
case SDL_MOUSEMOTION:
// remove other SDL_MOUSEMOTION events from queue
SDL_FlushEvent(SDL_MOUSEMOTION);
if (event.motion.state) {
return TOUCH_MOVE | touch_pack_xy(x, y);
}
break;
case SDL_MOUSEBUTTONUP:
return TOUCH_END | touch_pack_xy(x, y);
}
break;
case SDL_KEYUP:
if (event.key.keysym.sym == SDLK_ESCAPE) {
__shutdown();
}
if (event.key.keysym.sym == SDLK_p) {
display_save("emu");
}
break;
case SDL_QUIT:
__shutdown();
break;
}
}
#endif
return 0;
}