mirror of
https://github.com/brl/mutter.git
synced 2024-12-03 13:20:41 -05:00
6102f80244
With test-clip it's possible to draw three different shapes depending on what mouse button is used: a rectangle, an ellipse or a path containing multiple shapes. However the ellipse is also a path so it doesn't really test anything extra from the third option. This replaces the ellipse with a rectangle that is first rotated by the modelview matrix. The rotated matrix won't be able to use the scissor so it can be used to test stencil and clip plane clipping.
368 lines
9.2 KiB
C
368 lines
9.2 KiB
C
#include <clutter/clutter.h>
|
|
#include <gmodule.h>
|
|
#include <math.h>
|
|
|
|
typedef struct _CallbackData CallbackData;
|
|
typedef struct _Clip Clip;
|
|
|
|
typedef enum
|
|
{
|
|
CLIP_NONE,
|
|
CLIP_RECTANGLE,
|
|
CLIP_ROTATED_RECTANGLE,
|
|
CLIP_SHAPES
|
|
} ClipType;
|
|
|
|
struct _Clip
|
|
{
|
|
ClipType type;
|
|
gint x1, y1, x2, y2;
|
|
};
|
|
|
|
struct _CallbackData
|
|
{
|
|
ClutterActor *stage;
|
|
CoglHandle hand;
|
|
|
|
Clip current_clip;
|
|
|
|
GSList *clips;
|
|
};
|
|
|
|
static const char
|
|
instructions[] =
|
|
"Press and drag any of the three mouse buttons to add a clip with different "
|
|
"shapes. Press 'r' to reset or 'u' to undo the last clip.";
|
|
|
|
static void
|
|
path_shapes (gint x, gint y, gint width, gint height)
|
|
{
|
|
cogl_path_move_to (x, y);
|
|
cogl_path_line_to (x, (y + height * 4 / 5));
|
|
cogl_path_line_to ((x + width * 4 / 15), (y + height * 4 / 5));
|
|
cogl_path_close ();
|
|
|
|
cogl_path_rectangle (x + width / 3,
|
|
y,
|
|
x + width * 9 / 15,
|
|
y + height * 4 / 5);
|
|
|
|
cogl_path_ellipse ((x + width * 4 / 5),
|
|
(y + height * 2 / 5),
|
|
(width * 2 / 15),
|
|
(height * 2 / 5));
|
|
}
|
|
|
|
static void
|
|
draw_shapes (gint x, gint y)
|
|
{
|
|
path_shapes (x, y, 300, 100);
|
|
cogl_set_source_color4ub (0x00, 0x00, 0xff, 0xff);
|
|
cogl_path_fill_preserve ();
|
|
cogl_set_source_color4ub (0xff, 0x00, 0x00, 0xff);
|
|
cogl_path_stroke ();
|
|
}
|
|
|
|
static void
|
|
make_clip_path (Clip *clip)
|
|
{
|
|
switch (clip->type)
|
|
{
|
|
case CLIP_NONE:
|
|
break;
|
|
|
|
case CLIP_RECTANGLE:
|
|
cogl_path_rectangle (clip->x1,
|
|
clip->y1,
|
|
clip->x2,
|
|
clip->y2);
|
|
break;
|
|
|
|
case CLIP_ROTATED_RECTANGLE:
|
|
{
|
|
int size = MIN (ABS (clip->x2 - clip->x1),
|
|
ABS (clip->y2 - clip->y1));
|
|
int cx = (clip->x1 + clip->x2) / 2;
|
|
int cy = (clip->y1 + clip->y2) / 2;
|
|
|
|
cogl_path_move_to (cx - size / 2, cy);
|
|
cogl_path_line_to (cx, cy - size / 2);
|
|
cogl_path_line_to (cx + size / 2, cy);
|
|
cogl_path_line_to (cx, cy + size / 2);
|
|
cogl_path_close ();
|
|
}
|
|
break;
|
|
|
|
case CLIP_SHAPES:
|
|
{
|
|
int x, y, width, height;
|
|
|
|
if (clip->x1 < clip->x2)
|
|
{
|
|
x = clip->x1;
|
|
width = clip->x2 - x;
|
|
}
|
|
else
|
|
{
|
|
x = clip->x2;
|
|
width = clip->x1 - x;
|
|
}
|
|
if (clip->y1 < clip->y2)
|
|
{
|
|
y = clip->y1;
|
|
height = clip->y2 - y;
|
|
}
|
|
else
|
|
{
|
|
y = clip->y2;
|
|
height = clip->y1 - y;
|
|
}
|
|
|
|
path_shapes (x, y, width, height);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
on_paint (ClutterActor *actor, CallbackData *data)
|
|
{
|
|
int i;
|
|
ClutterGeometry stage_size;
|
|
gint hand_width, hand_height;
|
|
GSList *node;
|
|
|
|
clutter_actor_get_allocation_geometry (data->stage, &stage_size);
|
|
|
|
hand_width = cogl_texture_get_width (data->hand);
|
|
hand_height = cogl_texture_get_height (data->hand);
|
|
|
|
/* Setup the clipping */
|
|
for (node = data->clips; node; node = node->next)
|
|
{
|
|
Clip *clip = (Clip *) node->data;
|
|
|
|
if (clip->type == CLIP_RECTANGLE)
|
|
cogl_clip_push_rectangle (clip->x1,
|
|
clip->y1,
|
|
clip->x2,
|
|
clip->y2);
|
|
else if (clip->type == CLIP_ROTATED_RECTANGLE)
|
|
{
|
|
float size = MIN (ABS (clip->x2 - clip->x1),
|
|
ABS (clip->y2 - clip->y1));
|
|
int cx = (clip->x1 + clip->x2) / 2;
|
|
int cy = (clip->y1 + clip->y2) / 2;
|
|
|
|
size = sqrtf ((size / 2) * (size / 2) * 2);
|
|
|
|
cogl_push_matrix ();
|
|
|
|
/* Rotate 45° about the centre point */
|
|
cogl_translate (cx, cy, 0.0f);
|
|
cogl_rotate (45.0f, 0.0f, 0.0f, 1.0f);
|
|
cogl_clip_push_rectangle (-size / 2, -size / 2, size / 2, size / 2);
|
|
|
|
cogl_pop_matrix ();
|
|
}
|
|
else
|
|
{
|
|
make_clip_path (clip);
|
|
cogl_clip_push_from_path ();
|
|
}
|
|
}
|
|
|
|
/* Draw a rectangle filling the entire stage */
|
|
cogl_set_source_color4ub (0x80, 0x80, 0xff, 0xff);
|
|
cogl_rectangle (0, 0, stage_size.width, stage_size.height);
|
|
|
|
draw_shapes (10, 10);
|
|
|
|
/* Draw the hand at different rotations */
|
|
for (i = -2; i <= 2; i++)
|
|
{
|
|
cogl_push_matrix ();
|
|
|
|
cogl_translate (stage_size.width / 2 + stage_size.width / 6 * i,
|
|
stage_size.height / 2, 0);
|
|
|
|
cogl_rotate (i * 40, 0, 1, 0);
|
|
|
|
cogl_set_source_color4ub (0xff, 0xff, 0xff, 0xff);
|
|
|
|
cogl_set_source_texture (data->hand);
|
|
cogl_rectangle_with_texture_coords ((-hand_width / 2),
|
|
(-hand_height / 2),
|
|
(hand_width / 2),
|
|
(hand_height / 2),
|
|
0, 0, 1, 1);
|
|
|
|
cogl_pop_matrix ();
|
|
}
|
|
|
|
draw_shapes (stage_size.width - 310, stage_size.height - 110);
|
|
|
|
/* Remove all of the clipping */
|
|
g_slist_foreach (data->clips, (GFunc) cogl_clip_pop, NULL);
|
|
|
|
/* Draw the bounding box for each of the clips */
|
|
for (node = data->clips; node; node = node->next)
|
|
{
|
|
Clip *clip = (Clip *) node->data;
|
|
|
|
make_clip_path (clip);
|
|
cogl_set_source_color4ub (0x00, 0x00, 0xff, 0xff);
|
|
cogl_path_stroke ();
|
|
}
|
|
|
|
/* Draw the bounding box for the pending new clip */
|
|
if (data->current_clip.type != CLIP_NONE)
|
|
{
|
|
make_clip_path (&data->current_clip);
|
|
cogl_set_source_color4ub (0xff, 0x00, 0x00, 0xff);
|
|
cogl_path_stroke ();
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
on_button_press (ClutterActor *stage, ClutterButtonEvent *event,
|
|
CallbackData *data)
|
|
{
|
|
data->current_clip.x1 = data->current_clip.x2 = event->x;
|
|
data->current_clip.y1 = data->current_clip.y2 = event->y;
|
|
|
|
data->current_clip.type
|
|
= event->button == 1 ? CLIP_RECTANGLE
|
|
: event->button == 2 ? CLIP_SHAPES
|
|
: CLIP_ROTATED_RECTANGLE;
|
|
|
|
clutter_actor_queue_redraw (stage);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean
|
|
on_button_release (ClutterActor *stage, ClutterButtonEvent *event,
|
|
CallbackData *data)
|
|
{
|
|
if (data->current_clip.type != CLIP_NONE)
|
|
{
|
|
data->clips = g_slist_prepend (data->clips,
|
|
g_slice_copy (sizeof (Clip),
|
|
&data->current_clip));
|
|
|
|
data->current_clip.type = CLIP_NONE;
|
|
}
|
|
|
|
clutter_actor_queue_redraw (stage);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean
|
|
on_motion (ClutterActor *stage, ClutterMotionEvent *event,
|
|
CallbackData *data)
|
|
{
|
|
if (data->current_clip.type != CLIP_NONE)
|
|
{
|
|
data->current_clip.x2 = event->x;
|
|
data->current_clip.y2 = event->y;
|
|
|
|
clutter_actor_queue_redraw (stage);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
free_clips (CallbackData *data)
|
|
{
|
|
GSList *node;
|
|
|
|
for (node = data->clips; node; node = node->next)
|
|
g_slice_free (Clip, node->data);
|
|
|
|
g_slist_free (data->clips);
|
|
|
|
data->clips = NULL;
|
|
}
|
|
|
|
static gboolean
|
|
on_key_press (ClutterActor *stage,
|
|
ClutterEvent *event,
|
|
CallbackData *data)
|
|
{
|
|
switch (clutter_event_get_key_symbol (event))
|
|
{
|
|
case CLUTTER_KEY_r:
|
|
free_clips (data);
|
|
clutter_actor_queue_redraw (stage);
|
|
break;
|
|
|
|
case CLUTTER_KEY_u:
|
|
if (data->clips)
|
|
{
|
|
g_slice_free (Clip, data->clips->data);
|
|
data->clips = g_slist_delete_link (data->clips, data->clips);
|
|
clutter_actor_queue_redraw (stage);
|
|
}
|
|
break;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
G_MODULE_EXPORT int
|
|
test_clip_main (int argc, char **argv)
|
|
{
|
|
CallbackData data;
|
|
ClutterActor *stub_actor, *label;
|
|
gchar *file;
|
|
|
|
clutter_init (&argc, &argv);
|
|
|
|
data.current_clip.type = CLIP_NONE;
|
|
data.clips = NULL;
|
|
|
|
data.stage = clutter_stage_get_default ();
|
|
|
|
stub_actor = clutter_rectangle_new ();
|
|
clutter_container_add (CLUTTER_CONTAINER (data.stage), stub_actor, NULL);
|
|
|
|
file = g_build_filename (TESTS_DATADIR, "redhand.png", NULL);
|
|
data.hand = cogl_texture_new_from_file (file,
|
|
COGL_TEXTURE_NONE,
|
|
COGL_PIXEL_FORMAT_ANY,
|
|
NULL);
|
|
g_free (file);
|
|
|
|
label = clutter_text_new_with_text ("Sans 12px", instructions);
|
|
clutter_text_set_line_wrap (CLUTTER_TEXT (label), TRUE);
|
|
clutter_actor_set_width (label, clutter_actor_get_width (data.stage) - 310);
|
|
clutter_actor_set_y (label,
|
|
clutter_actor_get_height (data.stage)
|
|
- clutter_actor_get_height (label));
|
|
clutter_container_add (CLUTTER_CONTAINER (data.stage), label, NULL);
|
|
|
|
g_signal_connect (stub_actor, "paint", G_CALLBACK (on_paint), &data);
|
|
|
|
g_signal_connect (data.stage, "button-press-event",
|
|
G_CALLBACK (on_button_press), &data);
|
|
g_signal_connect (data.stage, "button-release-event",
|
|
G_CALLBACK (on_button_release), &data);
|
|
g_signal_connect (data.stage, "motion-event",
|
|
G_CALLBACK (on_motion), &data);
|
|
g_signal_connect (data.stage, "key-press-event",
|
|
G_CALLBACK (on_key_press), &data);
|
|
|
|
clutter_actor_show (data.stage);
|
|
|
|
clutter_main ();
|
|
|
|
cogl_handle_unref (data.hand);
|
|
|
|
free_clips (&data);
|
|
|
|
return 0;
|
|
}
|