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-rw-r--r--test/test_redisplay.c133
1 files changed, 133 insertions, 0 deletions
diff --git a/test/test_redisplay.c b/test/test_redisplay.c
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+++ b/test/test_redisplay.c
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+/*
+ Copyright 2020 David Robillard <http://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>
+
+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 = {1, 2, 3, 4};
+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_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) {
+ puglPostRedisplayRect(view, redisplayRect);
+ test->state = POSTED_REDISPLAY;
+ }
+ break;
+
+ default: break;
+ }
+
+ return PUGL_SUCCESS;
+}
+
+static void
+tick(PuglWorld* world)
+{
+ assert(!puglPollEvents(world, -1));
+ assert(!puglDispatchEvents(world));
+}
+
+int
+main(int argc, char** argv)
+{
+ PuglTest app = {puglParseTestOptions(&argc, &argv),
+ puglNewWorld(),
+ 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);
+
+ // Create and show window
+ assert(!puglCreateWindow(app.view, "Pugl Test"));
+ assert(!puglShowWindow(app.view));
+ while (app.state != EXPOSED) {
+ tick(app.world);
+ }
+
+ // Send a custom event to trigger a redisplay in the event loop
+ const PuglEventClient client = { PUGL_CLIENT, 0, postRedisplayId, 0 };
+ assert(!puglSendEvent(app.view, (const PuglEvent*)&client));
+
+ // Loop until an expose happens in the same iteration as the redisplay
+ app.state = SHOULD_REDISPLAY;
+ while (app.state != REDISPLAYED) {
+ tick(app.world);
+ assert(app.state != POSTED_REDISPLAY);
+ }
+
+ // Tear down
+ puglFreeView(app.view);
+ puglFreeWorld(app.world);
+
+ return 0;
+}