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util/show-traps: Cache the rendering of the traps+edges

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Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2011-08-12 20:15:19 +01:00
parent b8e8c4cf9a
commit e7bd4c93e3
1 changed files with 86 additions and 14 deletions
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100
util/show-traps.c
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@ -47,6 +47,9 @@ typedef struct _TrapView {
struct _TrapView *group_next;
struct _TrapView *group_prev;
cairo_surface_t *pixmap;
int pixmap_width, pixmap_height;
traps_t *traps_list;
traps_t *current_traps;
@ -95,30 +98,27 @@ _compute_intersection_point (const line_t *line,
p->x = _compute_intersection_x_for_y (line, p->y = y);
}
static void
trap_view_draw (TrapView *self, cairo_t *cr)
static cairo_surface_t *
pixmap_create (TrapView *self, cairo_surface_t *target)
{
cairo_surface_t *surface = cairo_surface_create_similar (target, CAIRO_CONTENT_COLOR,
self->widget.allocation.width,
self->widget.allocation.height);
cairo_t *cr;
traps_t *traps;
edges_t *edges;
gdouble sf_x, sf_y, sf;
gdouble mid, dim;
gdouble x0, x1, y0, y1;
gdouble x0, y0;
double dash[2] = {8, 8};
double dots[2] = {0., 1.};
int n;
box_t extents;
point_t p;
cairo_save (cr);
cairo_save (cr);
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_paint (cr);
cairo_restore (cr);
traps = self->current_traps;
if (traps == NULL)
return;
return surface;
edges = self->current_edges;
extents = traps->extents;
@ -146,11 +146,13 @@ trap_view_draw (TrapView *self, cairo_t *cr)
mid = (extents.p2.x + extents.p1.x) / 2.;
dim = sf_x / sf * (extents.p2.x - extents.p1.x) / 2. * 1.25;
x0 = mid - dim;
x1 = mid + dim;
mid = (extents.p2.y + extents.p1.y) / 2.;
dim = sf_y / sf * (extents.p2.y - extents.p1.y) / 2. * 1.25;
y0 = mid - dim;
y1 = mid + dim;
cr = cairo_create (surface);
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_paint (cr);
cairo_save (cr);
cairo_scale (cr, sf, sf);
@ -353,12 +355,80 @@ trap_view_draw (TrapView *self, cairo_t *cr)
cairo_restore (cr);
}
cairo_destroy (cr);
return surface;
}
static void
trap_view_draw (TrapView *self, cairo_t *cr)
{
traps_t *traps;
edges_t *edges;
gdouble sf_x, sf_y, sf;
gdouble mid, dim;
gdouble x0, y0;
double dash[2] = {8, 8};
int n;
box_t extents;
point_t p;
if (self->pixmap_width != self->widget.allocation.width ||
self->pixmap_height != self->widget.allocation.height)
{
cairo_surface_destroy (self->pixmap);
self->pixmap = pixmap_create (self, cairo_get_target (cr));
self->pixmap_width = self->widget.allocation.width;
self->pixmap_height = self->widget.allocation.height;
}
cairo_save (cr);
cairo_set_source_surface (cr, self->pixmap, 0, 0);
cairo_paint (cr);
cairo_restore (cr);
traps = self->current_traps;
if (traps == NULL)
return;
extents = traps->extents;
edges = self->current_edges;
if (edges != NULL) {
if (edges->extents.p1.x < extents.p1.x)
extents.p1.x = edges->extents.p1.x;
if (edges->extents.p1.y < extents.p1.y)
extents.p1.y = edges->extents.p1.y;
if (edges->extents.p2.x > extents.p2.x)
extents.p2.x = edges->extents.p2.x;
if (edges->extents.p2.y > extents.p2.y)
extents.p2.y = edges->extents.p2.y;
}
mid = (extents.p2.x + extents.p1.x) / 2.;
dim = (extents.p2.x - extents.p1.x) / 2. * 1.25;
sf_x = self->widget.allocation.width / dim / 2;
mid = (extents.p2.y + extents.p1.y) / 2.;
dim = (extents.p2.y - extents.p1.y) / 2. * 1.25;
sf_y = self->widget.allocation.height / dim / 2;
sf = MIN (sf_x, sf_y);
mid = (extents.p2.x + extents.p1.x) / 2.;
dim = sf_x / sf * (extents.p2.x - extents.p1.x) / 2. * 1.25;
x0 = mid - dim;
mid = (extents.p2.y + extents.p1.y) / 2.;
dim = sf_y / sf * (extents.p2.y - extents.p1.y) / 2. * 1.25;
y0 = mid - dim;
cairo_save (cr);
/* draw a zoom view of the area around the mouse */
{
cairo_save (cr);
double zoom = self->mag_zoom;
int size = self->mag_size;
cairo_save (cr);
/* bottom right */
cairo_rectangle (cr, self->mag_x, self->mag_y, size, size);
cairo_stroke_preserve (cr);
@ -645,6 +715,7 @@ trap_view_advance (TrapView *self)
self->current_traps = self->current_traps->prev;
if (self->current_edges && self->current_edges->prev)
self->current_edges = self->current_edges->prev;
self->pixmap_width = self->pixmap_height = 0;
gtk_widget_queue_draw (&self->widget);
}
@ -655,6 +726,7 @@ trap_view_back (TrapView *self)
self->current_traps = self->current_traps->next;
if (self->current_edges && self->current_edges->next)
self->current_edges = self->current_edges->next;
self->pixmap_width = self->pixmap_height = 0;
gtk_widget_queue_draw (&self->widget);
}