Move demo programs to examples directory

These are not really tests, but examples or demos, which has caused some
confusion in the past.  So, move them, and make room for actual tests.

1 files changed, 255 insertions, 0 deletions

diff --git a/examples/pugl_cairo_demo.c b/examples/pugl_cairo_demo.c
new file mode 100644
index 0000000..94ac26e
--- /dev/null
+++ b/examples/pugl_cairo_demo.c
@@ -0,0 +1,255 @@
+/*
+  Copyright 2012-2019 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.
+*/
+
+/**
+   @file pugl_cairo_demo.c An example of drawing with Cairo.
+*/
+
+#include "demo_utils.h"
+#include "test/test_utils.h"
+
+#include "pugl/pugl.h"
+#include "pugl/pugl_cairo.h"
+
+#include <cairo.h>
+
+#include <math.h>
+#include <stdbool.h>
+#include <stdio.h>
+
+static PuglWorld*      world = NULL;
+static PuglTestOptions opts  = {0};
+
+static int      quit        = 0;
+static bool     entered     = false;
+static bool     mouseDown   = false;
+static unsigned framesDrawn = 0;
+
+typedef struct {
+	int         x;
+	int         y;
+	int         w;
+	int         h;
+	const char* label;
+} Button;
+
+static Button buttons[] = { { 128, 128, 64, 64, "1"   },
+                            { 384, 128, 64, 64, "2"   },
+                            { 128, 384, 64, 64, "3"   },
+                            { 384, 384, 64, 64, "4"   },
+                            { 0,   0,   0,   0,  NULL } };
+
+static void
+roundedBox(cairo_t* cr, double x, double y, double w, double h)
+{
+	static const double radius  = 10;
+	static const double degrees = 3.14159265 / 180.0;
+
+	cairo_new_sub_path(cr);
+	cairo_arc(cr,
+	          x + w - radius,
+	          y + radius,
+	          radius, -90 * degrees, 0 * degrees);
+	cairo_arc(cr,
+	          x + w - radius, y + h - radius,
+	          radius, 0 * degrees, 90 * degrees);
+	cairo_arc(cr,
+	          x + radius, y + h - radius,
+	          radius, 90 * degrees, 180 * degrees);
+	cairo_arc(cr,
+	          x + radius, y + radius,
+	          radius, 180 * degrees, 270 * degrees);
+	cairo_close_path(cr);
+}
+
+static void
+buttonDraw(cairo_t* cr, const Button* but, const double time)
+{
+	cairo_save(cr);
+	cairo_translate(cr, but->x, but->y);
+	cairo_rotate(cr, sin(time) * 3.141592);
+
+	// Draw base
+	if (mouseDown) {
+		cairo_set_source_rgba(cr, 0.4, 0.9, 0.1, 1);
+	} else {
+		cairo_set_source_rgba(cr, 0.3, 0.5, 0.1, 1);
+	}
+	roundedBox(cr, 0, 0, but->w, but->h);
+	cairo_fill_preserve(cr);
+
+	// Draw border
+	cairo_set_source_rgba(cr, 0.4, 0.9, 0.1, 1);
+	cairo_set_line_width(cr, 4.0);
+	cairo_stroke(cr);
+
+	// Draw label
+	cairo_text_extents_t extents;
+	cairo_set_font_size(cr, 32.0);
+	cairo_text_extents(cr, but->label, &extents);
+	cairo_move_to(cr,
+	              (but->w / 2.0) - extents.width / 2,
+	              (but->h / 2.0) + extents.height / 2);
+	cairo_set_source_rgba(cr, 0, 0, 0, 1);
+	cairo_show_text(cr, but->label);
+
+	cairo_restore(cr);
+}
+
+static void
+postButtonRedisplay(PuglView* view)
+{
+	const PuglRect frame  = puglGetFrame(view);
+	const double   width  = frame.width;
+	const double   height = frame.height;
+	const double   scaleX = (width - (512 / width)) / 512.0;
+	const double   scaleY = (height - (512 / height)) / 512.0;
+
+	for (Button* b = buttons; b->label; ++b) {
+		const double   span = sqrt(b->w * b->w + b->h * b->h);
+		const PuglRect rect = {(b->x - span) * scaleX,
+		                       (b->y - span) * scaleY,
+		                       span * 2.0 * scaleX,
+		                       span * 2.0 * scaleY};
+
+		puglPostRedisplayRect(view, rect);
+	}
+}
+
+static void
+onDisplay(PuglView* view, const PuglEventExpose* event)
+{
+	cairo_t* cr = (cairo_t*)puglGetContext(view);
+
+	cairo_rectangle(cr, event->x, event->y, event->width, event->height);
+	cairo_clip_preserve(cr);
+
+	// Draw background
+	const PuglRect frame  = puglGetFrame(view);
+	const double   width  = frame.width;
+	const double   height = frame.height;
+	if (entered) {
+		cairo_set_source_rgb(cr, 0.1, 0.1, 0.1);
+	} else {
+		cairo_set_source_rgb(cr, 0, 0, 0);
+	}
+	cairo_fill(cr);
+
+	// Scale to view size
+	const double scaleX = (width - (512 / width)) / 512.0;
+	const double scaleY = (height - (512 / height)) / 512.0;
+	cairo_scale(cr, scaleX, scaleY);
+
+	// Draw button
+	for (Button* b = buttons; b->label; ++b) {
+		buttonDraw(cr, b, opts.continuous ? puglGetTime(world) : 0.0);
+	}
+
+	++framesDrawn;
+}
+
+static void
+onClose(PuglView* view)
+{
+	(void)view;
+	quit = 1;
+}
+
+static PuglStatus
+onEvent(PuglView* view, const PuglEvent* event)
+{
+	switch (event->type) {
+	case PUGL_KEY_PRESS:
+		if (event->key.key == 'q' || event->key.key == PUGL_KEY_ESCAPE) {
+			quit = 1;
+		}
+		break;
+	case PUGL_BUTTON_PRESS:
+		mouseDown = true;
+		postButtonRedisplay(view);
+		break;
+	case PUGL_BUTTON_RELEASE:
+		mouseDown = false;
+		postButtonRedisplay(view);
+		break;
+	case PUGL_ENTER_NOTIFY:
+		entered = true;
+		puglPostRedisplay(view);
+		break;
+	case PUGL_LEAVE_NOTIFY:
+		entered = false;
+		puglPostRedisplay(view);
+		break;
+	case PUGL_EXPOSE:
+		onDisplay(view, &event->expose);
+		break;
+	case PUGL_CLOSE:
+		onClose(view);
+		break;
+	default: break;
+	}
+
+	return PUGL_SUCCESS;
+}
+
+int
+main(int argc, char** argv)
+{
+	opts = puglParseTestOptions(&argc, &argv);
+	if (opts.help) {
+		puglPrintTestUsage("pugl_test", "");
+		return 1;
+	}
+
+	world = puglNewWorld();
+	puglSetClassName(world, "PuglCairoTest");
+
+	PuglRect  frame = { 0, 0, 512, 512 };
+	PuglView* view  = puglNewView(world);
+	puglSetFrame(view, frame);
+	puglSetMinSize(view, 256, 256);
+	puglSetViewHint(view, PUGL_RESIZABLE, opts.resizable);
+	puglSetBackend(view, puglCairoBackend());
+
+	puglSetViewHint(view, PUGL_IGNORE_KEY_REPEAT, opts.ignoreKeyRepeat);
+	puglSetEventFunc(view, onEvent);
+
+	PuglStatus st = puglCreateWindow(view, "Pugl Test");
+	if (st) {
+		return logError("Failed to create window (%s)\n", puglStrerror(st));
+	}
+
+	puglShowWindow(view);
+
+	PuglFpsPrinter fpsPrinter = { puglGetTime(world) };
+	while (!quit) {
+		if (opts.continuous) {
+			postButtonRedisplay(view);
+		} else {
+			puglPollEvents(world, -1);
+		}
+
+		puglDispatchEvents(world);
+
+		if (opts.continuous) {
+			puglPrintFps(world, &fpsPrinter, &framesDrawn);
+		}
+	}
+
+	puglFreeView(view);
+	puglFreeWorld(world);
+	return 0;
+}