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/*
* Copyright © 2004 David Reveman, Peter Nilsson
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the names of
* David Reveman and Peter Nilsson not be used in advertising or
* publicity pertaining to distribution of the software without
* specific, written prior permission. David Reveman and Peter Nilsson
* makes no representations about the suitability of this software for
* any purpose. It is provided "as is" without express or implied warranty.
*
* DAVID REVEMAN AND PETER NILSSON DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL DAVID REVEMAN AND
* PETER NILSSON BE LIABLE FOR ANY SPECIAL, 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.
*
* Authors: David Reveman <c99drn@cs.umu.se>
* Peter Nilsson <c99pnn@cs.umu.se>
*/
#include <cairo.h>
#include <sys/time.h>
#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <string.h>
#include <unistd.h>
#include <math.h>
#include "demo.h"
static void
gear(cairo_t *cr,
double inner_radius,
double outer_radius,
int teeth,
double tooth_depth)
{
int i;
double r0, r1, r2;
double angle, da;
r0 = inner_radius;
r1 = outer_radius - tooth_depth / 2.0;
r2 = outer_radius + tooth_depth / 2.0;
da = 2.0 * M_PI / (double) teeth / 4.0;
cairo_new_path (cr);
angle = 0.0;
cairo_move_to (cr, r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da));
for (i = 1; i <= teeth; i++) {
angle = i * 2.0 * M_PI / (double) teeth;
cairo_line_to (cr, r1 * cos (angle), r1 * sin (angle));
cairo_line_to (cr, r2 * cos (angle + da), r2 * sin (angle + da));
cairo_line_to (cr, r2 * cos (angle + 2 * da), r2 * sin (angle + 2 * da));
if (i < teeth)
cairo_line_to (cr,
r1 * cos (angle + 3 * da),
r1 * sin (angle + 3 * da));
}
cairo_close_path (cr);
cairo_new_sub_path(cr);
cairo_arc_negative(cr, 0, 0, r0, 2*M_PI, 0);
}
static double gear1_rotation = 0.35;
static double gear2_rotation = 0.33;
static double gear3_rotation = 0.50;
static cairo_pattern_t *gear1_sprite;
static cairo_pattern_t *gear2_sprite;
static cairo_pattern_t *gear3_sprite;
static void
gears_render (cairo_t *cr, int w, int h, cairo_antialias_t antialias)
{
cairo_set_source_rgba (cr, 0.75, 0.75, 0.75, 1.0);
cairo_set_line_width (cr, 1.0);
cairo_save (cr);
cairo_scale (cr, (double) w / 512.0, (double) h / 512.0);
cairo_save (cr);
cairo_translate (cr, 170.0, 330.0);
cairo_rotate (cr, gear1_rotation);
if (gear1_sprite) {
cairo_translate (cr, -140, -140);
cairo_set_source (cr, gear1_sprite);
cairo_paint (cr);
} else {
gear (cr, 30.0, 120.0, 20, 20.0);
cairo_set_source_rgb (cr, 0.75, 0.45, 0.45);
cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
cairo_fill_preserve (cr);
cairo_set_source_rgb (cr, 0.25, 0.15, 0.15);
cairo_set_antialias (cr, antialias);
cairo_stroke (cr);
}
cairo_restore (cr);
cairo_save (cr);
cairo_translate (cr, 369.0, 330.0);
cairo_rotate (cr, gear2_rotation);
if (gear2_sprite) {
cairo_translate (cr, -95, -95);
cairo_set_source (cr, gear2_sprite);
cairo_paint (cr);
} else {
gear (cr, 15.0, 75.0, 12, 20.0);
cairo_set_source_rgb (cr, 0.45, 0.75, 0.45);
cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
cairo_fill_preserve (cr);
cairo_set_source_rgb (cr, 0.15, 0.25, 0.15);
cairo_set_antialias (cr, antialias);
cairo_stroke (cr);
}
cairo_restore (cr);
cairo_save (cr);
cairo_translate (cr, 170.0, 116.0);
cairo_rotate (cr, gear3_rotation);
if (gear3_sprite) {
cairo_translate (cr, -100, -100);
cairo_set_source (cr, gear3_sprite);
cairo_paint (cr);
} else {
gear (cr, 20.0, 90.0, 14, 20.0);
cairo_set_source_rgb (cr, 0.45, 0.45, 0.75);
cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
cairo_fill_preserve (cr);
cairo_set_antialias (cr, antialias);
cairo_set_source_rgb (cr, 0.15, 0.15, 0.25);
cairo_stroke (cr);
}
cairo_restore (cr);
cairo_restore (cr);
gear1_rotation += 0.01;
gear2_rotation -= (0.01 * (20.0 / 12.0));
gear3_rotation -= (0.01 * (20.0 / 14.0));
}
static void create_sprites (struct device *device, cairo_antialias_t antialias)
{
struct framebuffer *fb = device->get_framebuffer (device);
cairo_surface_t *surface;
cairo_t *cr;
surface = cairo_surface_create_similar (fb->surface,
CAIRO_CONTENT_COLOR_ALPHA,
280, 280);
cr = cairo_create (surface);
cairo_translate (cr, 140, 140);
gear (cr, 30.0, 120.0, 20, 20.0);
cairo_set_source_rgb (cr, 0.75, 0.45, 0.45);
cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
cairo_fill_preserve (cr);
cairo_set_source_rgb (cr, 0.25, 0.15, 0.15);
cairo_set_antialias (cr, antialias);
cairo_stroke (cr);
cairo_destroy (cr);
gear1_sprite = cairo_pattern_create_for_surface (surface);
cairo_surface_destroy (surface);
surface = cairo_surface_create_similar (fb->surface,
CAIRO_CONTENT_COLOR_ALPHA,
190, 190);
cr = cairo_create (surface);
cairo_translate (cr, 95, 95);
gear (cr, 15.0, 75.0, 12, 20.0);
cairo_set_source_rgb (cr, 0.45, 0.75, 0.45);
cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
cairo_fill_preserve (cr);
cairo_set_source_rgb (cr, 0.15, 0.25, 0.15);
cairo_set_antialias (cr, antialias);
cairo_stroke (cr);
cairo_destroy (cr);
gear2_sprite = cairo_pattern_create_for_surface (surface);
cairo_surface_destroy (surface);
surface = cairo_surface_create_similar (fb->surface,
CAIRO_CONTENT_COLOR_ALPHA,
200, 200);
cr = cairo_create (surface);
cairo_translate (cr, 100, 100);
gear (cr, 20.0, 90.0, 14, 20.0);
cairo_set_source_rgb (cr, 0.45, 0.45, 0.75);
cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
cairo_fill_preserve (cr);
cairo_set_antialias (cr, antialias);
cairo_set_source_rgb (cr, 0.15, 0.15, 0.25);
cairo_stroke (cr);
cairo_destroy (cr);
gear3_sprite = cairo_pattern_create_for_surface (surface);
cairo_surface_destroy (surface);
}
static int done;
static void signal_handler(int sig)
{
done = sig;
}
int main (int argc, char **argv)
{
struct device *device;
struct timeval start, last_tty, last_fps, now;
double delta;
int frame = 0;
const char *version = NULL;
int benchmark;
int show_fps = 1;
int use_sprites = 0;
cairo_antialias_t antialias;
int n;
device = device_open(argc, argv);
version = device_show_version(argc, argv);
benchmark = device_get_benchmark(argc, argv);
if (benchmark == 0)
benchmark = 20;
if (benchmark > 0)
show_fps = 0;
antialias = device_get_antialias(argc, argv);
for (n = 1; n < argc; n++) {
if (strcmp (argv[n], "--hide-fps") == 0)
show_fps = 0;
if (strcmp (argv[n], "--use-sprites") == 0)
use_sprites = 1;
}
if (use_sprites)
create_sprites (device, antialias);
signal(SIGHUP, signal_handler);
gettimeofday(&start, 0); now = last_tty = last_fps = start;
do {
struct framebuffer *fb = device->get_framebuffer (device);
cairo_t *cr;
cr = cairo_create(fb->surface);
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
gears_render(cr, device->width, device->height, antialias);
gettimeofday(&now, NULL);
if (show_fps && last_fps.tv_sec)
fps_draw(cr, device->name, version, &last_fps, &now);
last_fps = now;
cairo_destroy(cr);
fb->show (fb);
fb->destroy (fb);
frame++;
if (benchmark > 0) {
delta = now.tv_sec - start.tv_sec;
delta += (now.tv_usec - start.tv_usec)*1e-6;
if (delta > benchmark) {
printf("gears: %.2f fps\n", frame / delta);
break;
}
}
} while (!done);
if (benchmark < 0) {
struct framebuffer *fb = device->get_framebuffer (device);
cairo_t *cr = cairo_create(fb->surface);
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
gears_render(cr, device->width, device->height, antialias);
cairo_destroy(cr);
fps_finish(fb, device->name, version, "gears");
fb->show (fb);
fb->destroy (fb);
pause ();
}
return 0;
}
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