#include <gtk/gtk.h>
#include <cairo.h>
+#include <math.h>
+
+typedef enum {
+ ANIM_BLANK,
+ ANIM_HEAD,
+ ANIM_BODY,
+ ANIM_SPIN,
+ ANIM_SPIN_DONE,
+ ANIM_OUTLINE,
+ ANIM_FADE,
+ ANIM_DONE
+} anim_stage_t;
+
+typedef struct _timeline {
+ double duration;
+ anim_stage_t state;
+ double transition;
+} timeline_t;
+
+timeline_t timeline[] = {
+ { 0.5, ANIM_BLANK, 0.0},
+ { 1.0, ANIM_HEAD, 0.0},
+ { 2.0, ANIM_BODY, 0.0},
+ { 7.0, ANIM_SPIN, 6.0},
+ { 1.0, ANIM_SPIN_DONE, 0.0},
+ { 1.0, ANIM_OUTLINE, 0.0},
+ { 1.0, ANIM_FADE, 0.5},
+ { 0.0, ANIM_DONE }
+};
typedef struct _state {
GtkWidget *drawing_area;
double progress;
+ anim_stage_t anim_stage;
} state_t;
+typedef struct _color {
+ double r;
+ double g;
+ double b;
+} color_t;
+
+#define HEX_COLOR(r,g,b) {(r) / 255.0, (g) / 255.0, (b) / 255.0}
+
+color_t background[2] = {
+ HEX_COLOR (0x75, 0x75, 0x75),
+ HEX_COLOR (0xdb, 0xdc, 0xdf)
+};
+
+color_t xo_green = HEX_COLOR (0x4f, 0xff, 0x12);
+color_t xo_black = HEX_COLOR (0x30, 0x30, 0x30);
+color_t dot_gray = HEX_COLOR (0xe5, 0xe5, 0xe5);
+color_t ring_white = HEX_COLOR (0xf1, 0xf1, 0xf1);
+
+#define LERP(a,b,t) ((a) + (t) * ((b) - (a)))
+#define LERP_COLORS(c0, c1, t) LERP((c0).r, (c1).r, (t)), \
+ LERP((c0).g, (c1).g, (t)), \
+ LERP((c0).b, (c1).b, (t))
+
+static void
+set_color (cairo_t *cr, color_t *color)
+{
+ cairo_set_source_rgb (cr, color->r, color->g, color->b);
+}
+
+#define XO_HEAD_CENTER_X 320
+#define XO_HEAD_CENTER_Y 211.5
+#define XO_HEAD_RADIUS 12.25
+#define XO_BODY_CENTER_X 320
+#define XO_BODY_CENTER_Y 250
+#define XO_BODY_DELTA 20.5
+#define XO_BODY_LINE_WIDTH 12.25
+#define XO_OUTLINE_EXTRA 2.5
+#define XO_OUTLINE_SHRINK 1.1
+#define XO_DOTS_CENTER_X 320
+#define XO_DOTS_CENTER_Y 240
+#define XO_DOTS_POSITION_RADIUS 112.5
+#define XO_DOTS_DOT_RADIUS 5.5
+#define XO_DOTS_NUM_DOTS 30
+#define XO_RING_CENTER_X 320
+#define XO_RING_CENTER_Y 240
+#define XO_RING_INNER_RADIUS 63
+#define XO_RING_OUTER_RADIUS 118
+
+static void
+draw_head (cairo_t *cr, double extra)
+{
+ cairo_arc (cr,
+ XO_HEAD_CENTER_X,
+ XO_HEAD_CENTER_Y,
+ XO_HEAD_RADIUS + extra,
+ 0, 2 * M_PI);
+ cairo_fill (cr);
+}
+
+static void
+draw_body (cairo_t *cr, double extra)
+{
+ cairo_move_to (cr,
+ XO_BODY_CENTER_X - XO_BODY_DELTA,
+ XO_BODY_CENTER_Y - XO_BODY_DELTA);
+ cairo_rel_line_to (cr, XO_BODY_DELTA, XO_BODY_DELTA);
+ cairo_rel_line_to (cr, XO_BODY_DELTA, -XO_BODY_DELTA);
+ cairo_move_to (cr,
+ XO_BODY_CENTER_X - XO_BODY_DELTA,
+ XO_BODY_CENTER_Y + XO_BODY_DELTA);
+ cairo_rel_line_to (cr, XO_BODY_DELTA, -XO_BODY_DELTA);
+ cairo_rel_line_to (cr, XO_BODY_DELTA, XO_BODY_DELTA);
+ cairo_set_line_width (cr, XO_BODY_LINE_WIDTH + 2 * extra);
+ cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
+ cairo_stroke (cr);
+}
+
+static void
+draw_dots (cairo_t *cr)
+{
+ int i;
+
+ cairo_save (cr);
+
+ set_color (cr, &dot_gray);
+
+ cairo_translate (cr, XO_DOTS_CENTER_X, XO_DOTS_CENTER_Y);
+ cairo_rotate (cr, - M_PI_2);
+
+ for (i = 0; i < XO_DOTS_NUM_DOTS; i++) {
+ cairo_arc (cr,
+ XO_DOTS_POSITION_RADIUS, 0,
+ XO_DOTS_DOT_RADIUS,
+ 0, 2 * M_PI);
+ cairo_fill (cr);
+ cairo_rotate (cr, 2 * M_PI / XO_DOTS_NUM_DOTS);
+ }
+
+ cairo_restore (cr);
+}
+
+static void
+draw_ring (cairo_t *cr)
+{
+ cairo_save (cr);
+
+ cairo_arc (cr,
+ XO_RING_CENTER_X,
+ XO_RING_CENTER_Y,
+ XO_RING_INNER_RADIUS,
+ 0, 2 * M_PI);
+ cairo_arc (cr,
+ XO_RING_CENTER_X,
+ XO_RING_CENTER_Y,
+ XO_RING_OUTER_RADIUS,
+ 0, 2 * M_PI);
+ set_color (cr, &ring_white);
+
+ cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
+ cairo_fill (cr);
+
+ cairo_restore (cr);
+}
+
static gboolean
xoboot_expose_event (GtkWidget *widget,
GdkEventExpose *event,
gpointer closure)
{
state_t *state = closure;
+ anim_stage_t anim_stage = state->anim_stage;
cairo_t *cr;
+ double shrink;
cr = gdk_cairo_create (widget->window);
- cairo_set_source_rgb (cr, state->progress, 0, 0);
+ if (anim_stage < ANIM_FADE)
+ set_color (cr, &background[0]);
+ else
+ set_color (cr, &background[1]);
+
cairo_paint (cr);
+ if (anim_stage == ANIM_BLANK)
+ goto DONE;
+
+ shrink = 0.0;
+ if (anim_stage >= ANIM_OUTLINE) {
+ set_color (cr, &xo_black);
+ draw_head (cr, XO_OUTLINE_EXTRA);
+ draw_body (cr, XO_OUTLINE_EXTRA);
+ shrink = - XO_OUTLINE_SHRINK;
+ }
+
+ set_color (cr, &xo_green);
+
+ draw_head (cr, shrink);
+ if (anim_stage == ANIM_HEAD)
+ goto DONE;
+
+ draw_body (cr, shrink);
+ if (anim_stage == ANIM_BODY)
+ goto DONE;
+
+ if (anim_stage < ANIM_FADE)
+ draw_dots (cr);
+ else
+ draw_ring (cr);
+
+ DONE:
cairo_destroy (cr);
return TRUE;
}
static gint
-timeout_callback (gpointer closure)
+timeline_advance (gpointer closure)
{
state_t *state = closure;
- state->progress += 0.01;
- if (state->progress > 1.0)
- state->progress = 1.0;
- else
- gtk_widget_queue_draw (state->drawing_area);
+ if (state->anim_stage == ANIM_DONE)
+ return FALSE;
+
+ state->anim_stage++;
+ gtk_widget_queue_draw (state->drawing_area);
return TRUE;
}
state.drawing_area = create_window (&state);
state.progress = 0.0;
+ state.anim_stage = 0;
gtk_widget_show_all (gtk_widget_get_toplevel (state.drawing_area));
- g_timeout_add (100, timeout_callback, &state);
+ g_timeout_add (1000, timeline_advance, &state);
gtk_main ();
projects / xoboot / blobdiff