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GTK 3 prep: make the server-side backing pixmap optional.

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When GDK_DISABLE_DEPRECATED is defined, we now don't have fe->pixmap;
instead we just maintain our client-side window contents in fe->image,
and draw from there directly to the window in the expose handler.
This commit is contained in:
Simon Tatham
2015-10-03 12:28:02 +01:00
parent 07906104a2
commit fd7882fb45
1 changed files with 54 additions and 26 deletions
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80
gtk.c
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@ -39,6 +39,9 @@
#endif
#if GTK_CHECK_VERSION(2,8,0)
# define USE_CAIRO
# if defined(GDK_DISABLE_DEPRECATED)
# define USE_CAIRO_WITHOUT_PIXMAP
# endif
#endif
/* #undef USE_CAIRO */
@ -126,7 +129,9 @@ struct frontend {
const float *colours;
cairo_t *cr;
cairo_surface_t *image;
#ifndef USE_CAIRO_WITHOUT_PIXMAP
GdkPixmap *pixmap;
#endif
GdkColor background; /* for painting outside puzzle area */
#else
GdkPixmap *pixmap;
@ -212,20 +217,22 @@ static void setup_drawing(frontend *fe)
static void teardown_drawing(frontend *fe)
{
cairo_t *cr;
cairo_destroy(fe->cr);
fe->cr = NULL;
cr = gdk_cairo_create(fe->pixmap);
cairo_set_source_surface(cr, fe->image, 0, 0);
cairo_rectangle(cr,
fe->bbox_l - 1,
fe->bbox_u - 1,
fe->bbox_r - fe->bbox_l + 2,
fe->bbox_d - fe->bbox_u + 2);
cairo_fill(cr);
cairo_destroy(cr);
#ifndef USE_CAIRO_WITHOUT_PIXMAP
{
cairo_t *cr = gdk_cairo_create(fe->pixmap);
cairo_set_source_surface(cr, fe->image, 0, 0);
cairo_rectangle(cr,
fe->bbox_l - 1,
fe->bbox_u - 1,
fe->bbox_r - fe->bbox_l + 2,
fe->bbox_d - fe->bbox_u + 2);
cairo_fill(cr);
cairo_destroy(cr);
}
#endif
}
static void snaffle_colours(frontend *fe)
@ -382,28 +389,28 @@ static void clear_backing_store(frontend *fe)
fe->image = NULL;
}
static void wipe_and_destroy_cairo(frontend *fe, cairo_t *cr)
{
cairo_set_source_rgb(cr, fe->colours[0], fe->colours[1], fe->colours[2]);
cairo_paint(cr);
cairo_destroy(cr);
}
static void setup_backing_store(frontend *fe)
{
cairo_t *cr;
int i;
#ifndef USE_CAIRO_WITHOUT_PIXMAP
fe->pixmap = gdk_pixmap_new(gtk_widget_get_window(fe->area),
fe->pw, fe->ph, -1);
#endif
fe->image = cairo_image_surface_create(CAIRO_FORMAT_RGB24,
fe->pw, fe->ph);
for (i = 0; i < 3; i++) {
switch (i) {
case 0: cr = cairo_create(fe->image); break;
case 1: cr = gdk_cairo_create(fe->pixmap); break;
case 2: cr = gdk_cairo_create(gtk_widget_get_window(fe->area));
break;
}
cairo_set_source_rgb(cr,
fe->colours[0], fe->colours[1], fe->colours[2]);
cairo_paint(cr);
cairo_destroy(cr);
}
wipe_and_destroy_cairo(fe, cairo_create(fe->image));
#ifndef USE_CAIRO_WITHOUT_PIXMAP
wipe_and_destroy_cairo(fe, gdk_cairo_create(fe->pixmap));
#endif
wipe_and_destroy_cairo(fe, gdk_cairo_create
(gtk_widget_get_window(fe->area)));
}
static int backing_store_ok(frontend *fe)
@ -414,7 +421,9 @@ static int backing_store_ok(frontend *fe)
static void teardown_backing_store(frontend *fe)
{
cairo_surface_destroy(fe->image);
#ifndef USE_CAIRO_WITHOUT_PIXMAP
gdk_pixmap_unref(fe->pixmap);
#endif
fe->image = NULL;
}
@ -668,6 +677,7 @@ static void teardown_backing_store(frontend *fe)
#endif
#ifndef USE_CAIRO_WITHOUT_PIXMAP
static void repaint_rectangle(frontend *fe, GtkWidget *widget,
int x, int y, int w, int h)
{
@ -703,6 +713,7 @@ static void repaint_rectangle(frontend *fe, GtkWidget *widget,
x - fe->ox, y - fe->oy, x, y, w, h);
gdk_gc_unref(gc);
}
#endif
/* ----------------------------------------------------------------------
* Pango font functions.
@ -983,11 +994,19 @@ void gtk_end_draw(void *handle)
teardown_drawing(fe);
if (fe->bbox_l < fe->bbox_r && fe->bbox_u < fe->bbox_d) {
#ifdef USE_CAIRO_WITHOUT_PIXMAP
gtk_widget_queue_draw_area(fe->area,
fe->bbox_l - 1 + fe->ox,
fe->bbox_u - 1 + fe->oy,
fe->bbox_r - fe->bbox_l + 2,
fe->bbox_d - fe->bbox_u + 2);
#else
repaint_rectangle(fe, fe->area,
fe->bbox_l - 1 + fe->ox,
fe->bbox_u - 1 + fe->oy,
fe->bbox_r - fe->bbox_l + 2,
fe->bbox_d - fe->bbox_u + 2);
#endif
}
}
@ -1185,9 +1204,18 @@ static gint expose_area(GtkWidget *widget, GdkEventExpose *event,
frontend *fe = (frontend *)data;
if (backing_store_ok(fe)) {
#ifdef USE_CAIRO_WITHOUT_PIXMAP
cairo_t *cr = gdk_cairo_create(gtk_widget_get_window(widget));
cairo_set_source_surface(cr, fe->image, fe->ox, fe->oy);
cairo_rectangle(cr, event->area.x, event->area.y,
event->area.width, event->area.height);
cairo_fill(cr);
cairo_destroy(cr);
#else
repaint_rectangle(fe, widget,
event->area.x, event->area.y,
event->area.width, event->area.height);
#endif
}
return TRUE;
}