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inline-display, scrollbars and fixed aspect ratio = fun

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This commit is contained in:
Robin Gareus 2016-03-14 22:32:21 +01:00
parent 594d0d8672
commit 7539bab670
2 changed files with 57 additions and 24 deletions
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80
gtk2_ardour/processor_box.cc
View file

@ -1204,6 +1204,7 @@ ProcessorEntry::PluginDisplay::PluginDisplay (boost::shared_ptr<ARDOUR::Plugin>
, _surf (0)
, _max_height (max_height)
, _cur_height (1)
, _scroll (false)
{
set_name ("processor prefader");
_plug->QueueDraw.connect (_qdraw_connection, invalidator (*this),
@ -1231,9 +1232,8 @@ ProcessorEntry::PluginDisplay::on_expose_event (GdkEventExpose* ev)
double const width = a.get_width();
double const height = a.get_height();
Plugin::Display_Image_Surface* csf = _plug->render_inline_display (width, _max_height);
if (!csf) {
Plugin::Display_Image_Surface* dis = _plug->render_inline_display (width, _max_height);
if (!dis) {
hide ();
if (_cur_height != 1) {
_cur_height = 1;
@ -1242,26 +1242,64 @@ ProcessorEntry::PluginDisplay::on_expose_event (GdkEventExpose* ev)
return true;
}
/* work-around scroll-bar + aspect ratio
* show inline-view -> height changes -> scrollbar gets added
* -> width changes -> inline-view, fixed aspect ratio -> height changes
* -> scroll bar is removed [-> width changes ; repeat ]
*/
uint32_t shm = std::min (_max_height, (uint32_t) ceil (dis->height));
bool sc = false;
Gtk::Container* pr = get_parent();
for (uint32_t i = 0; i < 4 && pr; ++i) {
// VBox, EventBox, ViewPort, ScrolledWindow
pr = pr->get_parent();
}
Gtk::ScrolledWindow* sw = dynamic_cast<Gtk::ScrolledWindow*> (pr);
if (sw) {
const Gtk::VScrollbar* vsb = sw->get_vscrollbar();
sc = vsb && vsb->is_visible();
}
if (shm != _cur_height) {
if (_scroll == sc || _cur_height < shm) {
queue_resize ();
}
_cur_height = shm;
}
_scroll = sc;
/* allocate a local image-surface,
* We cannot re-use the data via cairo_image_surface_create_for_data(),
* since pixman keeps a reference to it.
* we'd need to hand over the data and ha cairo_surface_destroy to free it.
* it might be possible to work around via cairo_surface_set_user_data().
*/
if (!_surf
|| csf->width != cairo_image_surface_get_width (_surf)
|| csf->height != cairo_image_surface_get_height (_surf)
|| csf->stride != cairo_image_surface_get_stride (_surf)
)
{
|| dis->width != cairo_image_surface_get_width (_surf)
|| dis->height != cairo_image_surface_get_height (_surf)
) {
if (_surf) {
cairo_surface_destroy (_surf);
}
_surf = cairo_image_surface_create_for_data (
csf->data,
CAIRO_FORMAT_ARGB32,
csf->width,
csf->height,
csf->stride);
} else {
memcpy (cairo_image_surface_get_data (_surf), csf->data, csf->stride * csf->height);
cairo_surface_mark_dirty(_surf);
_surf = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, dis->width, dis->height);
}
if (cairo_image_surface_get_stride (_surf) == dis->stride) {
memcpy (cairo_image_surface_get_data (_surf), dis->data, dis->stride * dis->height);
} else {
unsigned char *src = dis->data;
unsigned char *dst = cairo_image_surface_get_data (_surf);
const int dst_stride = cairo_image_surface_get_stride (_surf);
for(uint32_t y = 0; y < dis->height; ++y) {
memcpy (dst, src, dis->width * 4 /*ARGB32*/);
src += dis->stride;
dst += dst_stride;
}
}
cairo_surface_mark_dirty(_surf);
// all set. Now paint it black.
cairo_t* cr = gdk_cairo_create (get_window()->gobj());
cairo_rectangle (cr, ev->area.x, ev->area.y, ev->area.width, ev->area.height);
cairo_clip (cr);
@ -1276,13 +1314,7 @@ ProcessorEntry::PluginDisplay::on_expose_event (GdkEventExpose* ev)
Gtkmm2ext::rounded_rectangle (cr, .5, -1.5, width - 1, height + 1, 7);
cairo_clip (cr);
const double xc = floor ((width - csf->width) * .5);
const double sh = csf->height;
uint32_t shm = std::min (_max_height, (uint32_t) ceil (sh));
if (shm != _cur_height) {
_cur_height = shm;
queue_resize ();
}
const double xc = floor ((width - dis->width) * .5);
cairo_set_source_surface(cr, _surf, xc, 0);
cairo_paint (cr);
cairo_restore (cr);

1
gtk2_ardour/processor_box.h
View file

@ -232,6 +232,7 @@ private:
cairo_surface_t* _surf;
uint32_t _max_height;
uint32_t _cur_height;
bool _scroll;
};
class PortIcon : public Gtk::DrawingArea {