/*
Copyright 2012-2020 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.
*/
#include "demo_utils.h"
#include "test/test_utils.h"
#include "pugl/cairo.h"
#include "pugl/pugl.h"
#include <cairo.h>
#include <math.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
typedef struct {
PuglWorld* world;
PuglTestOptions opts;
unsigned framesDrawn;
int quit;
bool entered;
bool mouseDown;
} PuglTestApp;
typedef struct {
int x;
int y;
int w;
int h;
const char* label;
} Button;
static const 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(PuglTestApp* app, 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 (app->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 (const 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(PuglTestApp* app, PuglView* view, const PuglExposeEvent* 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 (app->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 (const Button* b = buttons; b->label; ++b) {
buttonDraw(
app, cr, b, app->opts.continuous ? puglGetTime(app->world) : 0.0);
}
++app->framesDrawn;
}
static void
onClose(PuglView* view)
{
PuglTestApp* app = (PuglTestApp*)puglGetHandle(view);
app->quit = 1;
}
static PuglStatus
onEvent(PuglView* view, const PuglEvent* event)
{
PuglTestApp* app = (PuglTestApp*)puglGetHandle(view);
printEvent(event, "Event: ", app->opts.verbose);
switch (event->type) {
case PUGL_KEY_PRESS:
if (event->key.key == 'q' || event->key.key == PUGL_KEY_ESCAPE) {
app->quit = 1;
}
break;
case PUGL_BUTTON_PRESS:
app->mouseDown = true;
postButtonRedisplay(view);
break;
case PUGL_BUTTON_RELEASE:
app->mouseDown = false;
postButtonRedisplay(view);
break;
case PUGL_POINTER_IN:
app->entered = true;
puglPostRedisplay(view);
break;
case PUGL_POINTER_OUT:
app->entered = false;
puglPostRedisplay(view);
break;
case PUGL_UPDATE:
if (app->opts.continuous) {
puglPostRedisplay(view);
}
break;
case PUGL_EXPOSE:
onDisplay(app, view, &event->expose);
break;
case PUGL_CLOSE:
onClose(view);
break;
default:
break;
}
return PUGL_SUCCESS;
}
int
main(int argc, char** argv)
{
PuglTestApp app;
memset(&app, 0, sizeof(app));
app.opts = puglParseTestOptions(&argc, &argv);
if (app.opts.help) {
puglPrintTestUsage("pugl_test", "");
return 1;
}
app.world = puglNewWorld(PUGL_PROGRAM, 0);
puglSetClassName(app.world, "PuglCairoTest");
PuglView* view = puglNewView(app.world);
puglSetWindowTitle(view, "Pugl Cairo Demo");
puglSetDefaultSize(view, 512, 512);
puglSetMinSize(view, 256, 256);
puglSetMaxSize(view, 2048, 2048);
puglSetViewHint(view, PUGL_RESIZABLE, app.opts.resizable);
puglSetHandle(view, &app);
puglSetBackend(view, puglCairoBackend());
puglSetViewHint(view, PUGL_IGNORE_KEY_REPEAT, app.opts.ignoreKeyRepeat);
puglSetEventFunc(view, onEvent);
PuglStatus st = puglRealize(view);
if (st) {
return logError("Failed to create window (%s)\n", puglStrerror(st));
}
puglShow(view);
PuglFpsPrinter fpsPrinter = {puglGetTime(app.world)};
const double timeout = app.opts.continuous ? (1 / 60.0) : -1.0;
while (!app.quit) {
puglUpdate(app.world, timeout);
if (app.opts.continuous) {
puglPrintFps(app.world, &fpsPrinter, &app.framesDrawn);
}
}
puglFreeView(view);
puglFreeWorld(app.world);
return 0;
}