void Gtk::ArcballWidget::stext(int size, GLfloat x, GLfloat y, GLfloat z,const char *str)const{
Glib::RefPtr<Pango::Context> widget_context = const_cast<Gtk::ArcballWidget*>(this)->get_pango_context();
Pango::FontDescription font_desc=widget_context->get_font_description();
Pango::Rectangle un,logical_rect;
GLfloat text_w, text_h;
GLfloat tangent_h;
/* Font */
font_desc.set_size(size * PANGO_SCALE);
if(!ft2_context)ft2_context=Glib::wrap(pango_ft2_get_context(72,72));
ft2_context->set_font_description(font_desc);
/* Text layout */
Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create(ft2_context);
layout->set_width(PANGO_SCALE * get_width());
layout->set_alignment(Pango::ALIGN_CENTER);
layout->set_text(str);
/*** OpenGL BEGIN ***/
layout->get_extents(un,logical_rect);
text_w = PANGO_PIXELS (logical_rect.get_width());
text_h = PANGO_PIXELS (logical_rect.get_height());
tangent_h = 3 * tan (20 * G_PI / 180.0);
tangent_h /= get_height();
glRasterPos3f (x,y,z);
/* Render text */
gl_pango_ft2_render_layout (layout);
}
int PrintNotesNoteAddin::compute_footer_height(const Glib::RefPtr<Gtk::PrintContext> & context)
{
Glib::RefPtr<Pango::Layout> layout = create_layout_for_timestamp(context);
Pango::Rectangle ink_rect;
Pango::Rectangle logical_rect;
layout->get_extents(ink_rect, logical_rect);
return pango_units_to_double(ink_rect.get_height())
+ cm_to_pixel(0.5, context->get_dpi_y());
}
void PrintNotesNoteAddin::on_begin_print(const Glib::RefPtr<Gtk::PrintContext>& context)
{
m_timestamp_footer = create_layout_for_timestamp(context);
// Create and initialize the page margins
m_margin_top = cm_to_pixel (1.5, context->get_dpi_y());
m_margin_left = cm_to_pixel (1, context->get_dpi_x());
m_margin_right = cm_to_pixel (1, context->get_dpi_x());
m_margin_bottom = 0;
double max_height = pango_units_from_double(context->get_height()
- m_margin_top - m_margin_bottom
- compute_footer_height(context));
DBG_OUT("margins = %d %d %d %d", m_margin_top, m_margin_left,
m_margin_right, m_margin_bottom);
m_page_breaks.clear();
Gtk::TextIter position;
Gtk::TextIter end_iter;
get_buffer()->get_bounds (position, end_iter);
double page_height = 0;
bool done = position.compare (end_iter) >= 0;
while (!done) {
Gtk::TextIter line_end = position;
if (!line_end.ends_line ()) {
line_end.forward_to_line_end ();
}
int paragraph_number = position.get_line();
int indentation = 0;
Glib::RefPtr<Pango::Layout> layout = create_layout_for_paragraph(
context, position, line_end, indentation);
Pango::Rectangle ink_rect;
Pango::Rectangle logical_rect;
for(int line_in_paragraph = 0; line_in_paragraph < layout->get_line_count();
line_in_paragraph++) {
Glib::RefPtr<Pango::LayoutLine> line = layout->get_line(line_in_paragraph);
line->get_extents (ink_rect, logical_rect);
if ((page_height + logical_rect.get_height()) >= max_height) {
PageBreak(paragraph_number, line_in_paragraph);
m_page_breaks.push_back (PageBreak(paragraph_number, line_in_paragraph));
page_height = 0;
}
page_height += logical_rect.get_height();
}
position.forward_line ();
done = position.compare (end_iter) >= 0;
}
m_print_op->set_n_pages(m_page_breaks.size() + 1);
}
void
ViewDrawingArea::draw_buffer()
{
#ifdef DEBUG
std::cerr << "VA->val:"<<_vadj->get_value() <<" VA->upper:"<<_vadj->get_upper() << std::endl << std::flush;
#endif
Feed *feed = AppContext::get().get_feed();
if (feed == NULL)
return;
if (AppContext::get().get_display_type() == FULL)
{
render_full_article();
return;
}
// Dimensions of drawing area
Gtk::Allocation allocation = get_allocation();
const int width = allocation.get_width();
const int height = allocation.get_height();
// First determine start item
Cairo::RefPtr<Cairo::Context> cr = _pixmap->create_cairo_context();
#ifdef DEBUG
/// This code was meant to investigate the 500ms delay with pango
/// at start of rendering.
if (!_layout_prepared)
{
Glib::Timer sw;
sw.start();
Glib::RefPtr<Pango::Layout> pl = Pango::Layout::create (cr);
const char *fonts[] = {"Sans 10", "Sans 14"};
for (unsigned i = 0; i < sizeof(fonts)/sizeof(const char*); ++i)
{
Pango::FontDescription fdesc (fonts[i]);
pl->set_font_description (fdesc);
pl->set_width (10 * Pango::SCALE); // force line break
pl->set_markup ("<b>Show Us Your Freaky Geek Costumes</b>\nHitting the streets in a scary, tech-themed outfit this Halloween? We want to see it. Find out how your Sergey Brin costume (or is it David Duchovny?) could be featured on Wired News. test\n test");
Pango::Rectangle irect, lrect;
pl->get_extents (irect, lrect);
}
_layout_prepared = true;
sw.stop();
unsigned long l;
sw.elapsed(l);
std::cerr << "Time spent rendering: " << l << " us" << std::endl << std::flush;
}
#endif
const item_list_t items = feed->get_items();
item_list_t::const_iterator start_item;
const int n_items = items.size();
double y = 0.0;
if (n_items == 0)
start_item = items.end();
else
{
// Set start_item and h
int start = static_cast<int> (_vadj->get_value());
double h = 0.0;
if (_vadj->get_value() > 0 && _vadj->get_value() == _vadj->get_upper())
{
// This will give a blank page when pulling the handle
// full down. While unusual, it might make sense with
// an ever-growing newslist.
y = 0.0;
start_item = items.end();
}
else
{
start_item = items.begin();
for (int i = 0; i < start; ++i)
++start_item;
if (start < 0)
start = 0;
double prop = _vadj->get_value() - start;
if (prop > 0.0)
{
(*start_item)->make_display_unit();
ItemDisplayUnit *du = (*start_item)->get_display_unit();
du->layout (cr);
h = du->get_height();
}
y = - h * prop;
#ifdef DEBUG
std::cerr << "prop:"<<prop <<" y:"<<y << std::endl << std::flush;
#endif
}
}
// clip to the area indicated by the expose event so that we only redraw
// the portion of the window that needs to be redrawn
cr->reset_clip();
cr->rectangle (0.0, 0.0, width, height);
cr->clip();
// Black on white
cr->set_source_rgb (1.0, 1.0, 1.0);
cr->paint();
cr->set_source_rgb (0.0, 0.0, 0.0);
// Render text
item_list_t::const_iterator it = start_item;
_top_item = *start_item;
_topitem_y = y;
int count = 0;
for (; it != items.end() && y < height; ++it, ++count)
{
(*it)->make_display_unit();
ItemDisplayUnit *du = (*it)->get_display_unit();
du->render (cr, 0, y);
y += du->get_height();
}
cr->show_page();
// Scrollbar settings can now be specified
_vadj->set_upper (n_items);
//_vadj->set_page_size (count - 1 + );
_vadj->set_step_increment (1);
_vadj->set_page_increment (count);
_vadj->changed();
}
static void
gl_pango_ft2_render_layout (Glib::RefPtr<Pango::Layout> layout)
{
Pango::Rectangle unu,logical_rect;
FT_Bitmap bitmap;
GLvoid *pixels;
guint32 *p;
GLfloat color[4];
guint32 rgb;
GLfloat a;
guint8 *row, *row_end;
int i;
layout->get_extents(unu,logical_rect);
if (logical_rect.get_width() == 0 || logical_rect.get_height() == 0)
return;
bitmap.rows = PANGO_PIXELS (logical_rect.get_height());
bitmap.width = PANGO_PIXELS (logical_rect.get_width());
bitmap.pitch = bitmap.width;
bitmap.buffer = (unsigned char*)g_malloc (bitmap.rows * bitmap.width);
bitmap.num_grays = 256;
bitmap.pixel_mode = ft_pixel_mode_grays;
memset (bitmap.buffer, 0, bitmap.rows * bitmap.width);
pango_ft2_render_layout (&bitmap, layout->gobj(),
PANGO_PIXELS (-logical_rect.get_x()), 0);
pixels = g_malloc (bitmap.rows * bitmap.width * 4);
p = (guint32 *) pixels;
glGetFloatv (GL_CURRENT_COLOR, color);
#if !defined(GL_VERSION_1_2) && G_BYTE_ORDER == G_LITTLE_ENDIAN
rgb = ((guint32) (color[0] * 255.0)) |
(((guint32) (color[1] * 255.0)) << 8) |
(((guint32) (color[2] * 255.0)) << 16);
#else
rgb = (((guint32) (color[0] * 255.0)) << 24) |
(((guint32) (color[1] * 255.0)) << 16) |
(((guint32) (color[2] * 255.0)) << 8);
#endif
a = color[3];
row = bitmap.buffer + bitmap.rows * bitmap.width; /* past-the-end */
row_end = bitmap.buffer; /* beginning */
if (a == 1.0)
{
do
{
row -= bitmap.width;
for (i = 0; i < bitmap.width; i++)
#if !defined(GL_VERSION_1_2) && G_BYTE_ORDER == G_LITTLE_ENDIAN
*p++ = rgb | (((guint32) row[i]) << 24);
#else
*p++ = rgb | ((guint32) row[i]);
#endif
}
while (row != row_end);
}
else
{
do
{
row -= bitmap.width;
for (i = 0; i < bitmap.width; i++)
#if !defined(GL_VERSION_1_2) && G_BYTE_ORDER == G_LITTLE_ENDIAN
*p++ = rgb | (((guint32) (a * row[i])) << 24);
#else
*p++ = rgb | ((guint32) (a * row[i]));
#endif
}
while (row != row_end);
}
glPixelStorei (GL_UNPACK_ALIGNMENT, 4);
glEnable (GL_BLEND);
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
#if !defined(GL_VERSION_1_2)
glDrawPixels (bitmap.width, bitmap.rows,
GL_RGBA, GL_UNSIGNED_BYTE,
pixels);
#else
glDrawPixels (bitmap.width, bitmap.rows,
GL_RGBA, GL_UNSIGNED_INT_8_8_8_8,
pixels);
#endif
glDisable (GL_BLEND);
g_free (bitmap.buffer);
g_free (pixels);
}
void PrintNotesNoteAddin::on_draw_page(const Glib::RefPtr<Gtk::PrintContext>& context, guint page_nr)
{
Cairo::RefPtr<Cairo::Context> cr = context->get_cairo_context();
cr->move_to (m_margin_left, m_margin_top);
PageBreak start;
if (page_nr != 0) {
start = m_page_breaks [page_nr - 1];
}
PageBreak end(-1, -1);
if (m_page_breaks.size() > page_nr) {
end = m_page_breaks [page_nr];
}
Gtk::TextIter position;
Gtk::TextIter end_iter;
get_buffer()->get_bounds (position, end_iter);
// Fast-forward to the starting line
while (position.get_line() < start.get_paragraph()) {
position.forward_line ();
}
bool done = position.compare (end_iter) >= 0;
while (!done) {
Gtk::TextIter line_end = position;
if (!line_end.ends_line ()) {
line_end.forward_to_line_end ();
}
int paragraph_number = position.get_line();
int indentation;
{
Glib::RefPtr<Pango::Layout> layout =
create_layout_for_paragraph (context,position, line_end, indentation);
for(int line_number = 0;
line_number < layout->get_line_count() && !done;
line_number++) {
// Skip the lines up to the starting line in the
// first paragraph on this page
if ((paragraph_number == start.get_paragraph()) &&
(line_number < start.get_line())) {
continue;
}
// Break as soon as we hit the end line
if ((paragraph_number == end.get_paragraph()) &&
(line_number == end.get_line())) {
done = true;
break;
}
Glib::RefPtr<Pango::LayoutLine> line = layout->get_line(line_number);
Pango::Rectangle ink_rect;
Pango::Rectangle logical_rect;
line->get_extents (ink_rect, logical_rect);
double curX, curY;
cr->get_current_point(curX, curY);
cr->move_to (m_margin_left + indentation, curY);
int line_height = pango_units_to_double(logical_rect.get_height());
double x, y;
x = m_margin_left + indentation;
cr->get_current_point(curX, curY);
y = curY + line_height;
pango_cairo_show_layout_line(cr->cobj(), line->gobj());
cr->move_to(x, y);
}
}
position.forward_line ();
done = done || (position.compare (end_iter) >= 0);
}
// Print the footer
int total_height = context->get_height();
int total_width = context->get_width();
int footer_height = 0;
double footer_anchor_x, footer_anchor_y;
{
Glib::RefPtr<Pango::Layout> pages_footer
= create_layout_for_pagenumbers (context, page_nr + 1,
m_page_breaks.size() + 1);
Pango::Rectangle ink_footer_rect;
Pango::Rectangle logical_footer_rect;
pages_footer->get_extents(ink_footer_rect, logical_footer_rect);
footer_anchor_x = cm_to_pixel(0.5, context->get_dpi_x());
footer_anchor_y = total_height - m_margin_bottom;
footer_height = pango_units_to_double(logical_footer_rect.get_height());
cr->move_to(total_width - pango_units_to_double(logical_footer_rect.get_width()) - cm_to_pixel(0.5, context->get_dpi_x()), footer_anchor_y);
pango_cairo_show_layout_line(cr->cobj(),
(pages_footer->get_line(0))->gobj());
}
cr->move_to(footer_anchor_x, footer_anchor_y);
pango_cairo_show_layout_line(cr->cobj(),
(m_timestamp_footer->get_line(0))->gobj());
cr->move_to(cm_to_pixel(0.5, context->get_dpi_x()),
total_height - m_margin_bottom - footer_height);
cr->line_to(total_width - cm_to_pixel(0.5, context->get_dpi_x()),
total_height - m_margin_bottom - footer_height);
cr->stroke();
}
