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livetrax/gtk2_ardour/canvas-simplerect.c

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#include <stdio.h>
#include <math.h>
#include <libgnomecanvas/libgnomecanvas.h>
#include "canvas-simplerect.h"
#include "rgb_macros.h"
enum {
ARG_0,
ARG_X1,
ARG_Y1,
ARG_X2,
ARG_Y2,
ARG_OUTLINE_PIXELS,
ARG_OUTLINE_WHAT,
ARG_FILL,
ARG_FILL_COLOR_RGBA,
ARG_OUTLINE_COLOR_RGBA,
ARG_DRAW
};
static void gnome_canvas_simplerect_class_init (GnomeCanvasSimpleRectClass *class);
static void gnome_canvas_simplerect_init (GnomeCanvasSimpleRect *simplerect);
static void gnome_canvas_simplerect_set_arg (GtkObject *object,
GtkArg *arg,
guint arg_id);
static void gnome_canvas_simplerect_get_arg (GtkObject *object,
GtkArg *arg,
guint arg_id);
static void gnome_canvas_simplerect_update (GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags);
static void gnome_canvas_simplerect_bounds (GnomeCanvasItem *item, double *x1, double *y1, double *x2, double *y2);
static double gnome_canvas_simplerect_point (GnomeCanvasItem *item, double x, double y, int cx, int cy, GnomeCanvasItem **actual_item);
static void gnome_canvas_simplerect_render (GnomeCanvasItem *item, GnomeCanvasBuf *buf);
static void gnome_canvas_simplerect_draw (GnomeCanvasItem *item, GdkDrawable *drawable, int x, int y, int w, int h);
static GnomeCanvasItemClass *parent_class;
GtkType
gnome_canvas_simplerect_get_type (void)
{
static GtkType simplerect_type = 0;
if (!simplerect_type) {
GtkTypeInfo simplerect_info = {
"GnomeCanvasSimpleRect",
sizeof (GnomeCanvasSimpleRect),
sizeof (GnomeCanvasSimpleRectClass),
(GtkClassInitFunc) gnome_canvas_simplerect_class_init,
(GtkObjectInitFunc) gnome_canvas_simplerect_init,
NULL, /* reserved_1 */
NULL, /* reserved_2 */
(GtkClassInitFunc) NULL
};
simplerect_type = gtk_type_unique (gnome_canvas_item_get_type (), &simplerect_info);
}
return simplerect_type;
}
static void
gnome_canvas_simplerect_class_init (GnomeCanvasSimpleRectClass *class)
{
GtkObjectClass *object_class;
GnomeCanvasItemClass *item_class;
object_class = (GtkObjectClass *) class;
item_class = (GnomeCanvasItemClass *) class;
parent_class = gtk_type_class (gnome_canvas_item_get_type ());
gtk_object_add_arg_type ("GnomeCanvasSimpleRect::x1", GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_X1);
gtk_object_add_arg_type ("GnomeCanvasSimpleRect::y1", GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_Y1);
gtk_object_add_arg_type ("GnomeCanvasSimpleRect::x2", GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_X2);
gtk_object_add_arg_type ("GnomeCanvasSimpleRect::y2", GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_Y2);
gtk_object_add_arg_type ("GnomeCanvasSimpleRect::fill", GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_FILL);
gtk_object_add_arg_type ("GnomeCanvasSimpleRect::draw", GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_DRAW);
gtk_object_add_arg_type ("GnomeCanvasSimpleRect::fill_color_rgba", GTK_TYPE_INT, GTK_ARG_READWRITE, ARG_FILL_COLOR_RGBA);
gtk_object_add_arg_type ("GnomeCanvasSimpleRect::outline_color_rgba", GTK_TYPE_INT, GTK_ARG_READWRITE, ARG_OUTLINE_COLOR_RGBA);
gtk_object_add_arg_type ("GnomeCanvasSimpleRect::outline_pixels", GTK_TYPE_INT, GTK_ARG_READWRITE, ARG_OUTLINE_PIXELS);
gtk_object_add_arg_type ("GnomeCanvasSimpleRect::outline_what", GTK_TYPE_INT, GTK_ARG_READWRITE, ARG_OUTLINE_WHAT);
object_class->set_arg = gnome_canvas_simplerect_set_arg;
object_class->get_arg = gnome_canvas_simplerect_get_arg;
item_class->update = gnome_canvas_simplerect_update;
item_class->bounds = gnome_canvas_simplerect_bounds;
item_class->point = gnome_canvas_simplerect_point;
item_class->render = gnome_canvas_simplerect_render;
item_class->draw = gnome_canvas_simplerect_draw;
}
static void
gnome_canvas_simplerect_init (GnomeCanvasSimpleRect *simplerect)
{
simplerect->x1 = 0.0;
simplerect->y1 = 0.0;
simplerect->x2 = 0.0;
simplerect->y2 = 0.0;
simplerect->fill = TRUE;
simplerect->draw = TRUE;
simplerect->full_draw_on_update = TRUE;
simplerect->fill_color = 0;
simplerect->outline_color = 0;
simplerect->outline_pixels = 1;
simplerect->outline_what = 0xf;
// GTK2FIX
// GNOME_CANVAS_ITEM(simplerect)->object.flags |= GNOME_CANVAS_ITEM_NO_AUTO_REDRAW;
}
static void
gnome_canvas_simplerect_bounds (GnomeCanvasItem *item, double *x1, double *y1, double *x2, double *y2)
{
GnomeCanvasSimpleRect *simplerect = GNOME_CANVAS_SIMPLERECT (item);
*x1 = simplerect->x1;
*y1 = simplerect->y1;
*x2 = simplerect->x2 + 1;
*y2 = simplerect->y2 + 1;
}
static void
gnome_canvas_simplerect_reset_bounds (GnomeCanvasItem *item)
{
GnomeCanvasSimpleRect* simplerect;
double x1, x2, y1, y2;
double old_x1, old_x2, old_y1, old_y2;
double a, b;
old_x1 = item->x1;
old_y1 = item->y1;
old_x2 = item->x2;
old_y2 = item->y2;
gnome_canvas_simplerect_bounds (item, &x1, &y1, &x2, &y2);
gnome_canvas_item_i2w (item, &x1, &y1);
gnome_canvas_item_i2w (item, &x2, &y2);
item->x1 = x1;
item->y1 = y1;
item->x2 = x2;
item->y2 = y2;
/* now compute bounding box in canvas units */
simplerect = GNOME_CANVAS_SIMPLERECT (item);
gnome_canvas_w2c (GNOME_CANVAS(item->canvas), x1, y1, &simplerect->bbox_ulx, &simplerect->bbox_uly);
gnome_canvas_w2c (GNOME_CANVAS(item->canvas), x2, y2, &simplerect->bbox_lrx, &simplerect->bbox_lry);
/* now queue redraws for changed areas */
if (item->x1 != old_x1) {
/* left edge changed. redraw the area that altered */
a = MIN(item->x1, old_x1);
b = MAX(item->x1, old_x1);
gnome_canvas_request_redraw (item->canvas, a - 1, item->y1, b + 1, item->y2);
}
if (item->x2 != old_x2) {
/* right edge changed. redraw the area that altered */
a = MIN(item->x2, old_x2);
b = MAX(item->x2, old_x2);
gnome_canvas_request_redraw (item->canvas, a - 1, item->y1, b + 1, item->y2);
}
if (item->y1 != old_y1) {
/* top edge changed. redraw the area that altered */
a = MIN(item->y1, old_y1);
b = MAX(item->y1, old_y1);
gnome_canvas_request_redraw (item->canvas, item->x1, a - 1, item->x2, b + 1);
}
if (item->y2 != old_y2) {
/* lower edge changed. redraw the area that altered */
a = MIN(item->y2, old_y2);
b = MAX(item->y2, old_y2);
gnome_canvas_request_redraw (item->canvas, item->x1, a - 1, item->x2, b + 1);
}
}
/*
* CANVAS CALLBACKS
*/
static void
gnome_canvas_simplerect_set_arg (GtkObject *object, GtkArg *arg, guint arg_id)
{
GnomeCanvasItem *item;
GnomeCanvasSimpleRect *simplerect;
int update;
int bounds_changed;
item = GNOME_CANVAS_ITEM (object);
simplerect = GNOME_CANVAS_SIMPLERECT (object);
update = FALSE;
bounds_changed = FALSE;
switch (arg_id) {
case ARG_X1:
if (simplerect->x1 != GTK_VALUE_DOUBLE (*arg)) {
simplerect->x1 = GTK_VALUE_DOUBLE (*arg);
bounds_changed = TRUE;
}
break;
case ARG_Y1:
if (simplerect->y1 != GTK_VALUE_DOUBLE (*arg)) {
simplerect->y1 = GTK_VALUE_DOUBLE (*arg);
bounds_changed = TRUE;
}
break;
case ARG_X2:
if (simplerect->x2 != GTK_VALUE_DOUBLE (*arg)) {
simplerect->x2 = GTK_VALUE_DOUBLE (*arg);
bounds_changed = TRUE;
}
break;
case ARG_Y2:
if (simplerect->y2 != GTK_VALUE_DOUBLE (*arg)) {
simplerect->y2 = GTK_VALUE_DOUBLE (*arg);
bounds_changed = TRUE;
}
break;
case ARG_DRAW:
if (simplerect->draw != GTK_VALUE_BOOL (*arg)) {
simplerect->draw = GTK_VALUE_BOOL (*arg);
update = TRUE;
}
break;
case ARG_FILL:
if (simplerect->fill != GTK_VALUE_BOOL (*arg)) {
simplerect->fill = GTK_VALUE_BOOL (*arg);
update = TRUE;
}
break;
case ARG_FILL_COLOR_RGBA:
if (simplerect->fill_color != GTK_VALUE_INT(*arg)) {
simplerect->fill_color = GTK_VALUE_INT(*arg);
update = TRUE;
}
break;
case ARG_OUTLINE_COLOR_RGBA:
if (simplerect->outline_color != GTK_VALUE_INT(*arg)) {
simplerect->outline_color = GTK_VALUE_INT(*arg);
update = TRUE;
}
break;
case ARG_OUTLINE_PIXELS:
if (simplerect->outline_pixels != GTK_VALUE_INT(*arg)) {
simplerect->outline_pixels = GTK_VALUE_INT(*arg);
update = TRUE;
}
break;
case ARG_OUTLINE_WHAT:
if (simplerect->outline_what != GTK_VALUE_INT(*arg)) {
simplerect->outline_what = GTK_VALUE_INT(*arg);
update = TRUE;
}
break;
default:
break;
}
simplerect->full_draw_on_update = update;
if (update || bounds_changed) {
gnome_canvas_item_request_update (item);
}
}
static void
gnome_canvas_simplerect_get_arg (GtkObject *object, GtkArg *arg, guint arg_id)
{
GnomeCanvasSimpleRect *simplerect;
simplerect = GNOME_CANVAS_SIMPLERECT (object);
switch (arg_id) {
case ARG_X1:
GTK_VALUE_DOUBLE (*arg) = simplerect->x1;
break;
case ARG_Y1:
GTK_VALUE_DOUBLE (*arg) = simplerect->y1;
break;
case ARG_X2:
GTK_VALUE_DOUBLE (*arg) = simplerect->x2;
break;
case ARG_Y2:
GTK_VALUE_DOUBLE (*arg) = simplerect->y2;
break;
case ARG_DRAW:
GTK_VALUE_BOOL (*arg) = simplerect->draw;
break;
case ARG_FILL:
GTK_VALUE_BOOL (*arg) = simplerect->fill;
break;
case ARG_FILL_COLOR_RGBA:
GTK_VALUE_INT (*arg) = simplerect->fill_color;
break;
case ARG_OUTLINE_COLOR_RGBA:
GTK_VALUE_INT (*arg) = simplerect->outline_color;
break;
case ARG_OUTLINE_PIXELS:
GTK_VALUE_INT (*arg) = simplerect->outline_pixels;
break;
case ARG_OUTLINE_WHAT:
GTK_VALUE_INT (*arg) = simplerect->outline_what;
break;
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}
static void
gnome_canvas_simplerect_update (GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags)
{
GnomeCanvasSimpleRect *simplerect;
unsigned char foo;
simplerect = GNOME_CANVAS_SIMPLERECT (item);
if (parent_class->update)
(* parent_class->update) (item, affine, clip_path, flags);
gnome_canvas_simplerect_reset_bounds (item);
if (simplerect->full_draw_on_update) {
gnome_canvas_request_redraw (item->canvas,
simplerect->bbox_ulx,
simplerect->bbox_uly,
simplerect->bbox_lrx+1,
simplerect->bbox_lry+1);
simplerect->full_draw_on_update = FALSE;
}
UINT_TO_RGBA (simplerect->fill_color, &simplerect->fill_r, &simplerect->fill_g, &simplerect->fill_b, &simplerect->fill_a);
UINT_TO_RGBA (simplerect->outline_color, &simplerect->outline_r, &simplerect->outline_g, &simplerect->outline_b, &foo);
}
#define SIMPLERECT_FAST_RENDERER
#ifdef SIMPLERECT_FAST_RENDERER
static void
gnome_canvas_simplerect_render (GnomeCanvasItem *item,
GnomeCanvasBuf *buf)
{
GnomeCanvasSimpleRect *simplerect;
int end, begin;
int ey, sy;
unsigned int i;
ArtIRect intersection;
ArtIRect self;
simplerect = GNOME_CANVAS_SIMPLERECT (item);
if (parent_class->render) {
(*parent_class->render) (item, buf);
}
if (buf->is_bg) {
// this can be useful for debugging/understanding how the canvas redraws
// stuff.
// gint randr, randg, randb;
// randr = random() % 255;
// randg = random() % 255;
// randb = random() % 255;
// PAINT_BOX(buf, randr, randg, randb, 255, buf->rect.x0, buf->rect.y0, buf->rect.x1, buf->rect.y1);
gnome_canvas_buf_ensure_buf (buf);
buf->is_bg = FALSE;
}
if (!simplerect->draw) {
return;
}
self.x0 = simplerect->bbox_ulx;
self.y0 = simplerect->bbox_uly;
self.x1 = simplerect->bbox_lrx;
self.y1 = simplerect->bbox_lry;
art_irect_intersect (&intersection, &self, &buf->rect);
begin = MAX(simplerect->bbox_ulx, buf->rect.x0);
end = MIN((simplerect->bbox_lrx-1), buf->rect.x1);
sy = simplerect->bbox_uly;
ey = simplerect->bbox_lry-1;
if (simplerect->fill) {
// this can be useful for debugging/understanding how the canvas redraws
// stuff.
// gint randr, randg, randb;
// randr = random() % 255;
// randg = random() % 255;
// randb = random() % 255;
// PAINT_BOX(buf, randr, randg, randb, simplerect->fill_a, begin, sy, end, ey);
FAST_PAINT_BOX (buf, simplerect->fill_r, simplerect->fill_g, simplerect->fill_b, simplerect->fill_a,
intersection.x0, intersection.y0,
intersection.x1, intersection.y1);
}
for (i = 0; i < simplerect->outline_pixels; ++i) {
if (simplerect->outline_what & 0x1) {
if (begin == simplerect->bbox_ulx) {
PAINT_VERT(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, begin + i, sy, ey);
}
}
if (simplerect->outline_what & 0x2) {
if (end == (simplerect->bbox_lrx - 1)) {
PAINT_VERT(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, end - i, sy, ey + 1);
}
}
if (simplerect->outline_what & 0x4) {
PAINT_HORIZ(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, begin, end, sy+i);
}
if (simplerect->outline_what & 0x8) {
PAINT_HORIZ(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, begin, end + 1, ey-i);
}
}
}
#else /* SIMPLERECT_FAST_RENDERER */
static void
gnome_canvas_simplerect_render (GnomeCanvasItem *item,
GnomeCanvasBuf *buf)
{
GnomeCanvasSimpleRect *simplerect;
int end, begin;
int ey, sy;
unsigned int i;
simplerect = GNOME_CANVAS_SIMPLERECT (item);
if (parent_class->render) {
(*parent_class->render) (item, buf);
}
if (buf->is_bg) {
// this can be useful for debugging/understanding how the canvas redraws
// stuff.
// gint randr, randg, randb;
// randr = random() % 255;
// randg = random() % 255;
// randb = random() % 255;
// PAINT_BOX(buf, randr, randg, randb, 255, buf->rect.x0, buf->rect.y0, buf->rect.x1, buf->rect.y1);
gnome_canvas_buf_ensure_buf (buf);
buf->is_bg = FALSE;
}
if (!simplerect->draw) {
return;
}
begin = MAX(simplerect->bbox_ulx,buf->rect.x0);
end = MIN((simplerect->bbox_lrx-1),buf->rect.x1);
sy = simplerect->bbox_uly;
ey = simplerect->bbox_lry-1;
if (simplerect->fill) {
// this can be useful for debugging/understanding how the canvas redraws
// stuff.
// gint randr, randg, randb;
// randr = random() % 255;
// randg = random() % 255;
// randb = random() % 255;
// PAINT_BOX(buf, randr, randg, randb, simplerect->fill_a, begin, sy, end, ey);
PAINT_BOX(buf, simplerect->fill_r, simplerect->fill_g, simplerect->fill_b, simplerect->fill_a, begin, sy, end, ey);
}
for (i = 0; i < simplerect->outline_pixels; ++i) {
if (simplerect->outline_what & 0x1) {
if (begin == simplerect->bbox_ulx) {
PAINT_VERT(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, begin + i, sy, ey);
}
}
if (simplerect->outline_what & 0x2) {
if (end == (simplerect->bbox_lrx - 1)) {
PAINT_VERT(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, end - i, sy, ey + 1);
}
}
if (simplerect->outline_what & 0x4) {
PAINT_HORIZ(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, begin, end, sy+i);
}
if (simplerect->outline_what & 0x8) {
PAINT_HORIZ(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, begin, end + 1, ey-i);
}
}
}
#endif /* SIMPLERECT_FAST_RENDERER */
static void
gnome_canvas_simplerect_draw (GnomeCanvasItem *item,
GdkDrawable *drawable,
int x, int y,
int width, int height)
{
fprintf (stderr, "please don't use the CanvasSimpleRect item in a non-aa Canvas\n");
abort ();
}
static double
gnome_canvas_simplerect_point (GnomeCanvasItem *item, double x, double y, int cx, int cy, GnomeCanvasItem **actual_item)
{
GnomeCanvasSimpleRect *simplerect;
double x1, y1, x2, y2;
double dx, dy;
simplerect = GNOME_CANVAS_SIMPLERECT (item);
*actual_item = item;
/* Find the bounds for the rectangle plus its outline width */
gnome_canvas_simplerect_bounds (item, &x1, &y1, &x2, &y2);
/* Is point inside rectangle */
if ((x >= x1) && (y >= y1) && (x <= x2) && (y <= y2)) {
return 0.0;
}
/* Point is outside rectangle */
if (x < x1)
dx = x1 - x;
else if (x > x2)
dx = x - x2;
else
dx = 0.0;
if (y < y1)
dy = y1 - y;
else if (y > y2)
dy = y - y2;
else
dy = 0.0;
return sqrt (dx * dx + dy * dy);
}