mirror of
https://github.com/libsdl-org/SDL.git
synced 2024-11-28 06:13:28 +08:00
127 lines
3.2 KiB
C
127 lines
3.2 KiB
C
/*
|
|
Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
|
|
|
|
This software is provided 'as-is', without any express or implied
|
|
warranty. In no event will the authors be held liable for any damages
|
|
arising from the use of this software.
|
|
|
|
Permission is granted to anyone to use this software for any purpose,
|
|
including commercial applications, and to alter it and redistribute it
|
|
freely.
|
|
*/
|
|
|
|
/* Simple program: Test relative mouse motion */
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <time.h>
|
|
|
|
#include "SDL_test_common.h"
|
|
|
|
#ifdef __EMSCRIPTEN__
|
|
#include <emscripten/emscripten.h>
|
|
#endif
|
|
|
|
static SDLTest_CommonState *state;
|
|
int i, done;
|
|
SDL_Rect rect;
|
|
SDL_Event event;
|
|
|
|
static void
|
|
DrawRects(SDL_Renderer * renderer)
|
|
{
|
|
SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
|
|
SDL_RenderFillRect(renderer, &rect);
|
|
}
|
|
|
|
static void
|
|
loop(){
|
|
/* Check for events */
|
|
while (SDL_PollEvent(&event)) {
|
|
SDLTest_CommonEvent(state, &event, &done);
|
|
switch(event.type) {
|
|
case SDL_MOUSEMOTION:
|
|
{
|
|
rect.x += event.motion.xrel;
|
|
rect.y += event.motion.yrel;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
for (i = 0; i < state->num_windows; ++i) {
|
|
SDL_Rect viewport;
|
|
SDL_Renderer *renderer = state->renderers[i];
|
|
if (state->windows[i] == NULL)
|
|
continue;
|
|
SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0x00, 0xFF);
|
|
SDL_RenderClear(renderer);
|
|
|
|
/* Wrap the cursor rectangle at the screen edges to keep it visible */
|
|
SDL_RenderGetViewport(renderer, &viewport);
|
|
if (rect.x < viewport.x) rect.x += viewport.w;
|
|
if (rect.y < viewport.y) rect.y += viewport.h;
|
|
if (rect.x > viewport.x + viewport.w) rect.x -= viewport.w;
|
|
if (rect.y > viewport.y + viewport.h) rect.y -= viewport.h;
|
|
|
|
DrawRects(renderer);
|
|
|
|
SDL_RenderPresent(renderer);
|
|
}
|
|
#ifdef __EMSCRIPTEN__
|
|
if (done) {
|
|
emscripten_cancel_main_loop();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
|
|
/* Enable standard application logging */
|
|
SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
|
|
|
|
/* Initialize test framework */
|
|
state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
|
|
if (!state) {
|
|
return 1;
|
|
}
|
|
for (i = 1; i < argc; ++i) {
|
|
SDLTest_CommonArg(state, i);
|
|
}
|
|
if (!SDLTest_CommonInit(state)) {
|
|
return 2;
|
|
}
|
|
|
|
/* Create the windows and initialize the renderers */
|
|
for (i = 0; i < state->num_windows; ++i) {
|
|
SDL_Renderer *renderer = state->renderers[i];
|
|
SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_NONE);
|
|
SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
|
|
SDL_RenderClear(renderer);
|
|
}
|
|
|
|
srand((unsigned int)time(NULL));
|
|
if(SDL_SetRelativeMouseMode(SDL_TRUE) < 0) {
|
|
return 3;
|
|
};
|
|
|
|
rect.x = DEFAULT_WINDOW_WIDTH / 2;
|
|
rect.y = DEFAULT_WINDOW_HEIGHT / 2;
|
|
rect.w = 10;
|
|
rect.h = 10;
|
|
/* Main render loop */
|
|
done = 0;
|
|
#ifdef __EMSCRIPTEN__
|
|
emscripten_set_main_loop(loop, 0, 1);
|
|
#else
|
|
while (!done) {
|
|
loop();
|
|
}
|
|
#endif
|
|
SDLTest_CommonQuit(state);
|
|
return 0;
|
|
}
|
|
|
|
/* vi: set ts=4 sw=4 expandtab: */
|