static void
twin_circletext_start (twin_screen_t *screen, int x, int y, int w, int h)
{
twin_window_t *window = twin_window_create (screen, TWIN_ARGB32,
TwinWindowApplication,
x, y, w, h);
int wid = window->client.right - window->client.left;
int hei = window->client.bottom - window->client.top;
twin_pixmap_t *pixmap = window->pixmap;
twin_path_t *path = twin_path_create ();
twin_path_t *pen = twin_path_create ();
twin_pixmap_t *alpha = twin_pixmap_create (TWIN_A8, wid, hei);
int s;
twin_operand_t source, mask;
twin_fill (pixmap, 0xffffffff, TWIN_SOURCE,
0, 0, wid, hei);
twin_window_set_name (window, "circletext");
twin_path_set_font_style (path, TWIN_TEXT_UNHINTED);
twin_path_circle (pen, 0, 0, D (1));
twin_path_translate (path, D(200), D(200));
twin_path_set_font_size (path, D(15));
for (s = 0; s < 41; s++)
{
twin_state_t state = twin_path_save (path);
twin_path_rotate (path, twin_degrees_to_angle (9 * s));
twin_path_move (path, D(100), D(0));
twin_path_utf8 (path, "Hello, world!");
twin_path_restore (path, &state);
}
twin_fill_path (alpha, path, 0, 0);
twin_path_destroy (path);
twin_path_destroy (pen);
source.source_kind = TWIN_SOLID;
source.u.argb = 0xff000000;
mask.source_kind = TWIN_PIXMAP;
mask.u.pixmap = alpha;
twin_composite (pixmap, 0, 0,
&source, 0, 0, &mask, 0, 0, TWIN_OVER, wid, hei);
twin_pixmap_destroy (alpha);
twin_window_show (window);
}
static void
_twin_clock_face (twin_clock_t *clock)
{
twin_path_t *path = twin_path_create ();
int m;
twin_clock_set_transform (clock, path);
twin_path_circle (path, 0, 0, TWIN_FIXED_ONE);
twin_paint_path (_twin_clock_pixmap(clock), TWIN_CLOCK_BACKGROUND, path);
twin_paint_stroke (_twin_clock_pixmap(clock), TWIN_CLOCK_BORDER, path, TWIN_CLOCK_BORDER_WIDTH);
{
twin_state_t state = twin_path_save (path);
twin_text_metrics_t metrics;
twin_fixed_t height, width;
static char *label = "twin";
twin_path_empty (path);
twin_path_rotate (path, twin_degrees_to_angle (-11) + TWIN_ANGLE_90);
twin_path_set_font_size (path, D(0.5));
twin_path_set_font_style (path, TWIN_TEXT_UNHINTED|TWIN_TEXT_OBLIQUE);
twin_text_metrics_utf8 (path, label, &metrics);
height = metrics.ascent + metrics.descent;
width = metrics.right_side_bearing - metrics.left_side_bearing;
twin_path_move (path, -width / 2, metrics.ascent - height/2 + D(0.01));
twin_path_draw (path, width / 2, metrics.ascent - height/2 + D(0.01));
twin_paint_stroke (_twin_clock_pixmap(clock), TWIN_CLOCK_WATER_UNDER, path, D(0.02));
twin_path_empty (path);
twin_path_move (path, -width / 2 - metrics.left_side_bearing, metrics.ascent - height/2);
twin_path_utf8 (path, label);
twin_paint_path (_twin_clock_pixmap(clock), TWIN_CLOCK_WATER, path);
twin_path_restore (path, &state);
}
twin_path_set_font_size (path, D(0.2));
twin_path_set_font_style (path, TWIN_TEXT_UNHINTED);
for (m = 1; m <= 60; m++)
{
twin_state_t state = twin_path_save (path);
twin_path_rotate (path, twin_clock_minute_angle (m) + TWIN_ANGLE_90);
twin_path_empty (path);
if (m % 5 != 0)
{
twin_path_move (path, 0, -TWIN_FIXED_ONE);
twin_path_draw (path, 0, -D(0.9));
twin_paint_stroke (_twin_clock_pixmap(clock), TWIN_CLOCK_TIC, path, D(0.01));
}
else
{
char hour[3];
twin_text_metrics_t metrics;
twin_fixed_t width;
twin_fixed_t left;
sprintf (hour, "%d", m / 5);
twin_text_metrics_utf8 (path, hour, &metrics);
width = metrics.right_side_bearing - metrics.left_side_bearing;
left = -width / 2 - metrics.left_side_bearing;
twin_path_move (path, left, -D(0.98) + metrics.ascent);
twin_path_utf8 (path, hour);
twin_paint_path (_twin_clock_pixmap(clock), TWIN_CLOCK_NUMBERS, path);
}
twin_path_restore (path, &state);
}
twin_path_destroy (path);
}
void
twin_demo_start (twin_screen_t *screen, const char *name, int x, int y, int w, int h)
{
#if 0
twin_circletext_start (screen, x, y, w, h);
#endif
twin_line_start (screen, x += 20, y += 20, w, h);
#if 0
twin_quickbrown_start (screen, x += 20, y += 20, w, h);
twin_ascii_start (screen, x += 20, y += 20, w, h);
twin_jelly_start (screen, x += 20, y += 20, w, h);
#endif
#if 0
#if 0
path = twin_path_create ();
twin_path_rotate (path, -TWIN_ANGLE_45);
twin_path_translate (path, D(10), D(2));
for (s = 0; s < 40; s++)
{
twin_path_rotate (path, TWIN_ANGLE_11_25 / 16);
twin_path_scale (path, D(1.125), D(1.125));
twin_path_move (path, D(0), D(0));
twin_path_draw (path, D(1), D(0));
twin_path_draw (path, D(1), D(1));
twin_path_draw (path, D(0), D(1));
}
twin_fill (alpha, 0x00000000, TWIN_SOURCE, 0, 0, w, h);
twin_fill_path (alpha, path);
source.source_kind = TWIN_SOLID;
source.u.argb = 0xffff0000;
mask.source_kind = TWIN_PIXMAP;
mask.u.pixmap = alpha;
twin_composite (red, 0, 0, &source, 0, 0, &mask, 0, 0, TWIN_OVER,
w, h);
#endif
#if 0
path = twin_path_create ();
stroke = twin_path_create ();
twin_path_translate (stroke, D(62), D(62));
twin_path_scale (stroke,D(60),D(60));
for (s = 0; s < 60; s++)
{
twin_state_t save = twin_path_save (stroke);
twin_angle_t a = s * TWIN_ANGLE_90 / 15;
twin_path_rotate (stroke, a);
twin_path_move (stroke, D(1), 0);
if (s % 5 == 0)
twin_path_draw (stroke, D(0.85), 0);
else
twin_path_draw (stroke, D(.98), 0);
twin_path_restore (stroke, &save);
}
twin_path_convolve (path, stroke, pen);
twin_fill (alpha, 0x00000000, TWIN_SOURCE, 0, 0, w, h);
twin_fill_path (alpha, path);
source.source_kind = TWIN_SOLID;
source.u.argb = 0xffff0000;
mask.source_kind = TWIN_PIXMAP;
mask.u.pixmap = alpha;
twin_composite (red, 0, 0, &source, 0, 0, &mask, 0, 0, TWIN_OVER,
w, h);
#endif
#if 0
path = twin_path_create ();
stroke = twin_path_create ();
twin_path_translate (stroke, D(100), D(100));
twin_path_scale (stroke, D(10), D(10));
twin_path_move (stroke, D(0), D(0));
twin_path_draw (stroke, D(10), D(0));
twin_path_convolve (path, stroke, pen);
twin_fill (alpha, 0x00000000, TWIN_SOURCE, 0, 0, w, h);
twin_fill_path (alpha, path);
source.source_kind = TWIN_SOLID;
source.u.argb = 0xffff0000;
mask.source_kind = TWIN_PIXMAP;
mask.u.pixmap = alpha;
twin_composite (red, 0, 0, &source, 0, 0, &mask, 0, 0, TWIN_OVER,
w, h);
#endif
#if 1
path = twin_path_create ();
stroke = twin_path_create ();
twin_path_move (stroke, D (10), D (40));
twin_path_draw (stroke, D (40), D (40));
twin_path_draw (stroke, D (10), D (10));
twin_path_move (stroke, D (10), D (50));
twin_path_draw (stroke, D (40), D (50));
twin_path_convolve (path, stroke, pen);
twin_path_destroy (stroke);
twin_fill (alpha, 0x00000000, TWIN_SOURCE, 0, 0, w, h);
twin_fill_path (alpha, path, 0, 0);
source.source_kind = TWIN_SOLID;
source.u.argb = 0xff00ff00;
mask.source_kind = TWIN_PIXMAP;
mask.u.pixmap = alpha;
twin_composite (blue, 0, 0, &source, 0, 0, &mask, 0, 0, TWIN_OVER,
100, 100);
twin_path_destroy (path);
path = twin_path_create ();
stroke = twin_path_create ();
twin_path_move (stroke, D (50), D (50));
twin_path_curve (stroke, D (70), D (70), D (80), D (70), D (100), D (50));
twin_fill (alpha, 0x00000000, TWIN_SOURCE, 0, 0, w, h);
twin_fill_path (alpha, stroke, 0, 0);
source.source_kind = TWIN_SOLID;
source.u.argb = 0xffff0000;
mask.source_kind = TWIN_PIXMAP;
mask.u.pixmap = alpha;
twin_composite (blue, 0, 0, &source, 0, 0, &mask, 0, 0, TWIN_OVER,
100, 100);
twin_path_convolve (path, stroke, pen);
twin_fill (alpha, 0x00000000, TWIN_SOURCE, 0, 0, w, h);
twin_fill_path (alpha, path, 0, 0);
source.source_kind = TWIN_SOLID;
source.u.argb = 0xff0000ff;
mask.source_kind = TWIN_PIXMAP;
mask.u.pixmap = alpha;
twin_composite (blue, 0, 0, &source, 0, 0, &mask, 0, 0, TWIN_OVER,
100, 100);
#endif
twin_window_show (redw);
twin_window_show (bluew);
#endif
}