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/*
* Copyright 2014 The Emscripten Authors. All rights reserved.
* Emscripten is available under two separate licenses, the MIT license and the
* University of Illinois/NCSA Open Source License. Both these licenses can be
* found in the LICENSE file.
*/
#include <stdio.h>
#include <SDL2/SDL.h>
#include <assert.h>
#include <emscripten.h>
int mouse_motions = 0;
#define abs(x) ((x) < 0 ? -(x) : (x))
#define eq(x, y) (abs((x) - (y)) <= 1)
void one() {
SDL_Event event;
while (SDL_PollEvent(&event)) {
switch(event.type) {
case SDL_MOUSEMOTION: {
SDL_MouseMotionEvent *m = (SDL_MouseMotionEvent*)&event;
assert(m->state == 0);
printf("motion : %d,%d %d,%d\n", m->x, m->y, m->xrel, m->yrel);
if (mouse_motions == 0) {
// Starting with SDL 2.26.0 initial xrel and yrel values are zero
// See: https://github.com/libsdl-org/SDL/commit/0e61c106
#ifdef TEST_SDL_MOUSE_OFFSETS
assert(eq(m->x, 5) && eq(m->y, 15) && eq(m->xrel, 0) && eq(m->yrel, 0));
#else
assert(eq(m->x, 10) && eq(m->y, 20) && eq(m->xrel, 0) && eq(m->yrel, 0));
#endif
} else if (mouse_motions == 1) {
#ifdef TEST_SDL_MOUSE_OFFSETS
assert(eq(m->x, 25) && eq(m->y, 65) && eq(m->xrel, 20) && eq(m->yrel, 50));
#else
assert(eq(m->x, 30) && eq(m->y, 70) && eq(m->xrel, 20) && eq(m->yrel, 50));
#endif
}
mouse_motions++;
break;
}
case SDL_MOUSEBUTTONDOWN: {
SDL_MouseButtonEvent *m = (SDL_MouseButtonEvent*)&event;
if (m->button == 2) {
emscripten_force_exit(0);
}
printf("button down : %d,%d %d,%d\n", m->button, m->state, m->x, m->y);
#ifdef TEST_SDL_MOUSE_OFFSETS
assert(eq(m->button, 1) && eq(m->state, 1) && eq(m->x, 5) && eq(m->y, 15));
#else
assert(eq(m->button, 1) && eq(m->state, 1) && eq(m->x, 10) && eq(m->y, 20));
#endif
break;
}
case SDL_MOUSEBUTTONUP: {
SDL_MouseButtonEvent *m = (SDL_MouseButtonEvent*)&event;
printf("button up : %d,%d %d,%d\n", m->button, m->state, m->x, m->y);
#ifdef TEST_SDL_MOUSE_OFFSETS
assert(eq(m->button, 1) && eq(m->state, 0) && eq(m->x, 5) && eq(m->y, 15));
#else
assert(eq(m->button, 1) && eq(m->state, 0) && eq(m->x, 10) && eq(m->y, 20));
#endif
// Remove another click we want to ignore
assert(SDL_PeepEvents(&event, 1, SDL_GETEVENT, SDL_MOUSEBUTTONDOWN, SDL_MOUSEBUTTONDOWN) == 1);
assert(SDL_PeepEvents(&event, 1, SDL_GETEVENT, SDL_MOUSEBUTTONUP, SDL_MOUSEBUTTONUP) == 1);
break;
}
}
}
}
int main() {
SDL_Init(SDL_INIT_VIDEO);
SDL_Window *window;
SDL_Renderer *renderer;
SDL_CreateWindowAndRenderer(600, 450, 0, &window, &renderer);
SDL_SetRenderDrawColor(renderer, 0xFF, 0x00, 0x00, 0xFF );
SDL_Rect rect = { 0, 0, 600, 450 };
SDL_RenderFillRect(renderer, &rect);
#ifdef TEST_SDL_MOUSE_OFFSETS
int absolute = true;
#else
int absolute = false;
#endif
EM_ASM(simulateMouseEvent(10, 20, -1, $0), absolute); // move from 0,0 to 10,20
EM_ASM(simulateMouseEvent(10, 20, 0, $0), absolute); // click
EM_ASM(simulateMouseEvent(10, 20, 0, $0), absolute); // click some more, but this one should be ignored through PeepEvent
EM_ASM(simulateMouseEvent(30, 70, -1, $0), absolute); // move some more
EM_ASM(simulateMouseEvent(30, 70, 1, $0), absolute); // trigger the end
emscripten_set_main_loop(one, 0, 0);
}
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