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/*
Copyright 2020 David Robillard <d@drobilla.net>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
Tests that redisplays posted in the event handler are dispatched at the end
of the same event loop iteration.
*/
#undef NDEBUG
#include "test_utils.h"
#include "pugl/pugl.h"
#include "pugl/pugl_stub.h"
#include <assert.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#ifdef __APPLE__
static const double timeout = 1 / 60.0;
#else
static const double timeout = -1.0;
#endif
typedef enum {
START,
EXPOSED,
SHOULD_REDISPLAY,
POSTED_REDISPLAY,
REDISPLAYED,
} State;
typedef struct
{
PuglTestOptions opts;
PuglWorld* world;
PuglView* view;
State state;
} PuglTest;
static const PuglRect redisplayRect = {2, 4, 8, 16};
static const uintptr_t postRedisplayId = 42;
static PuglStatus
onEvent(PuglView* view, const PuglEvent* event)
{
PuglTest* test = (PuglTest*)puglGetHandle(view);
if (test->opts.verbose) {
printEvent(event, "Event: ", true);
}
switch (event->type) {
case PUGL_UPDATE:
if (test->state == SHOULD_REDISPLAY) {
puglPostRedisplayRect(view, redisplayRect);
test->state = POSTED_REDISPLAY;
}
break;
case PUGL_EXPOSE:
if (test->state == START) {
test->state = EXPOSED;
} else if (test->state == POSTED_REDISPLAY &&
event->expose.x == redisplayRect.x &&
event->expose.y == redisplayRect.y &&
event->expose.width == redisplayRect.width &&
event->expose.height == redisplayRect.height) {
test->state = REDISPLAYED;
}
break;
case PUGL_CLIENT:
if (event->client.data1 == postRedisplayId) {
test->state = SHOULD_REDISPLAY;
}
break;
default: break;
}
return PUGL_SUCCESS;
}
int
main(int argc, char** argv)
{
PuglTest app = {puglParseTestOptions(&argc, &argv),
puglNewWorld(PUGL_PROGRAM, 0),
NULL,
START};
// Set up view
app.view = puglNewView(app.world);
puglSetClassName(app.world, "Pugl Test");
puglSetBackend(app.view, puglStubBackend());
puglSetHandle(app.view, &app);
puglSetEventFunc(app.view, onEvent);
puglSetDefaultSize(app.view, 512, 512);
// Create and show window
assert(!puglRealize(app.view));
assert(!puglShowWindow(app.view));
while (app.state != EXPOSED) {
assert(!puglUpdate(app.world, timeout));
}
// Send a custom event to trigger a redisplay in the event loop
PuglEvent client_event = {{PUGL_CLIENT, 0}};
client_event.client.data1 = postRedisplayId;
client_event.client.data2 = 0;
assert(!puglSendEvent(app.view, &client_event));
// Loop until an expose happens in the same iteration as the redisplay
app.state = SHOULD_REDISPLAY;
while (app.state != REDISPLAYED) {
assert(!puglUpdate(app.world, timeout));
assert(app.state != POSTED_REDISPLAY);
}
// Tear down
puglFreeView(app.view);
puglFreeWorld(app.world);
return 0;
}
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