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Could you please repeat that?

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XANTRONIX Development 2019-05-27 15:32:53 -05:00
parent f5a5710f0e
commit a3816b4a2f
1 changed files with 104 additions and 64 deletions
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168
examples/cluster.c
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@ -50,20 +50,38 @@ static void draw_face_number(cairo_t *cr,
cairo_save(cr);
cairo_rotate(cr, angle + 1.658);
cairo_show_text(cr, text);
cairo_stroke(cr);
cairo_restore(cr);
}
static void draw_tachometer_needle(cairo_t *cr,
double x,
double y,
double r,
double rpm) {
if (rpm > 8000) {
rpm = 8000;
}
draw_needle(cr, x, y, 0.77 * r,
232 * (M_PI/180),
488 * (M_PI/180),
rpm / 8000);
/*
* Draw a tiny boi circle
*/
cairo_set_source_rgb(cr, 1, 1, 1);
cairo_arc(cr, x, y, 0.08 * r, 0, 2*M_PI);
cairo_fill(cr);
}
static void draw_tachometer(cairo_t *cr,
double x,
double y,
double r,
double rpm) {
double r) {
int i;
if (rpm > 8000) {
rpm = 8000;
}
cairo_select_font_face(cr, "Helvetica",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
@ -89,21 +107,6 @@ static void draw_tachometer(cairo_t *cr,
i / 80.0,
text);
}
/*
* Draw a gauge needle
*/
draw_needle(cr, x, y, 0.77 * r,
232 * (M_PI/180),
488 * (M_PI/180),
rpm / 8000);
/*
* Draw a tiny boi circle
*/
cairo_set_source_rgb(cr, 1, 1, 1);
cairo_arc(cr, x, y, 0.08 * r, 0, 2*M_PI);
cairo_fill(cr);
}
static void draw_speedometer(cairo_t *cr,
@ -152,7 +155,55 @@ static void draw_mfd(cairo_t *cr,
cairo_stroke(cr);
}
static void draw_gauge_cluster(cairo_t *cr,
static void draw_gauge_cluster_bg(Pixmap buf,
Display *display,
int screen,
double width,
double height) {
cairo_surface_t *sfc;
cairo_t *cr;
sfc = cairo_xlib_surface_create(display, buf, DefaultVisual(display, screen), width, height);
cairo_xlib_surface_set_size(sfc, width, height);
cr = cairo_create(sfc);
/*
* Paint canvas black
*/
cairo_set_source_rgb(cr, 0, 0, 0);
cairo_paint(cr);
draw_tachometer(cr,
width * 0.2,
height * 0.5,
height * 0.4);
draw_speedometer(cr,
width * 0.8,
height * 0.5,
height * 0.4);
draw_thermometer(cr,
width * 0.43,
height * 0.76,
height * 0.13);
draw_fuel_gauge(cr,
width * 0.57,
height * 0.76,
height * 0.13);
draw_mfd(cr,
width * 0.42,
height * 0.1,
width * 0.16,
height * 0.5);
cairo_destroy(cr);
}
static void update_gauge_cluster(cairo_t *cr,
struct can_frame *frame,
double x,
double y,
@ -162,46 +213,21 @@ static void draw_gauge_cluster(cairo_t *cr,
if (frame->can_id == 0x280) {
rpm = 0.25 * (double)(frame->data[2] | (frame->data[3] << 8));
} else {
return;
}
/*
* Paint canvas black
*/
cairo_set_source_rgb(cr, 0, 0, 0);
cairo_paint(cr);
draw_tachometer(cr,
x + width * 0.2,
y + height * 0.5,
height * 0.4,
rpm);
draw_speedometer(cr,
x + width * 0.8,
y + height * 0.5,
height * 0.4);
draw_thermometer(cr,
x + width * 0.43,
y + height * 0.76,
height * 0.13);
draw_fuel_gauge(cr,
x + width * 0.57,
y + height * 0.76,
height * 0.13);
draw_mfd(cr,
x + width * 0.42,
y + height * 0.1,
width * 0.16,
height * 0.5);
draw_tachometer_needle(cr,
x + width * 0.2,
y + height * 0.5,
height * 0.4,
rpm);
}
int main(int argc, char **argv) {
Display *display;
Window win;
Pixmap buf;
Pixmap bg;
GC gc;
fd_set rfds, rready;
@ -230,18 +256,29 @@ int main(int argc, char **argv) {
fd2 = ConnectionNumber(display);
screen = DefaultScreen(display);
win = XCreateSimpleWindow(display, DefaultRootWindow(display), 0, 0, width, height, 0, 0, 0);
gc = XCreateGC(display, win, GCForeground | GCBackground | GCGraphicsExposures, &values);
buf = XCreatePixmap(display, win, width, height, 24);
win = XCreateSimpleWindow(display, DefaultRootWindow(display), 0, 0, width, height, 0, 0, 0);
gc = XCreateGC(display, win, GCForeground | GCBackground | GCGraphicsExposures, &values);
bg = XCreatePixmap(display, win, width, height, 24);
/*
* Draw the background layer
*/
draw_gauge_cluster_bg(bg, display, screen, width, height);
XSelectInput(display, win, ExposureMask | ButtonPressMask | KeyPressMask);
XMapWindow(display, win);
sfc = cairo_xlib_surface_create(display, buf, DefaultVisual(display, screen), width, height);
/*
* Set up the foreground surface
*/
sfc = cairo_xlib_surface_create(display, win, DefaultVisual(display, screen), width, height);
cairo_xlib_surface_set_size(sfc, width, height);
cr = cairo_create(sfc);
/*
* Set up file descriptors to monitor
*/
FD_ZERO(&rfds);
FD_SET(fd, &rfds);
@ -259,7 +296,7 @@ int main(int argc, char **argv) {
case Expose:
fprintf(stderr, "Event %d\n", e.type);
XCopyArea(display, buf, win, gc,
XCopyArea(display, bg, win, gc,
e.xexpose.x,
e.xexpose.y,
e.xexpose.width,
@ -288,11 +325,14 @@ int main(int argc, char **argv) {
struct can_frame frame;
hexagram_can_if_read(can_if, &frame);
draw_gauge_cluster(cr, &frame, 0, 0, width, height);
XCopyArea(display, buf, win, gc, 0, 0,
width, height,
0, 0);
if (frame.can_id == 0x280) {
XCopyArea(display, bg, win, gc, 0, 0,
width, height,
0, 0);
update_gauge_cluster(cr, &frame, 0, 0, width, height);
}
}
}