static void
print_pango_layout (GnomePrintContext *gpc, PangoLayout *layout)
{
PangoLayoutIter *iter;
gnome_print_gsave (gpc);
current_point_to_origin (gpc);
iter = pango_layout_get_iter (layout);
do {
PangoRectangle logical_rect;
PangoLayoutLine *line;
int baseline;
line = pango_layout_iter_get_line (iter);
pango_layout_iter_get_line_extents (iter, NULL, &logical_rect);
baseline = pango_layout_iter_get_baseline (iter);
moveto (gpc, logical_rect.x, - baseline);
print_pango_layout_line (gpc, line);
} while (pango_layout_iter_next_line (iter));
pango_layout_iter_free (iter);
gnome_print_grestore (gpc);
}
static PyObject *
pango_GetLayoutLinePos(PyObject *self, PyObject *args) {
int i, len;
double baseline, dy;
void *LayoutObj;
PangoLayout *layout;
PangoLayoutIter *iter;
PyObject *ret;
if (!PyArg_ParseTuple(args, "O", &LayoutObj)) {
return NULL;
}
layout = PyCObject_AsVoidPtr(LayoutObj);
len = pango_layout_get_line_count(layout);
ret = PyTuple_New(len);
iter = pango_layout_get_iter(layout);
dy = ((double) pango_layout_iter_get_baseline(iter)) / PANGO_SCALE;
for (i = 0; i < len; i++) {
baseline = -1.0 * ((double) pango_layout_iter_get_baseline(iter))
/ PANGO_SCALE + dy;
PyTuple_SetItem(ret, i, PyFloat_FromDouble(baseline));
pango_layout_iter_next_line(iter);
}
pango_layout_iter_free(iter);
return ret;
}
void
rsvg_text_render_text (RsvgDrawingCtx * ctx, const char *text, gdouble * x, gdouble * y)
{
PangoContext *context;
PangoLayout *layout;
PangoLayoutIter *iter;
RsvgState *state;
gint w, h, baseline;
state = rsvg_current_state (ctx);
/* Do not render the text if the font size is zero. See bug #581491. */
if (state->font_size.length == 0)
return;
context = ctx->render->create_pango_context (ctx);
layout = rsvg_text_create_layout (ctx, state, text, context);
pango_layout_get_size (layout, &w, &h);
iter = pango_layout_get_iter (layout);
baseline = pango_layout_iter_get_baseline (iter) / (double)PANGO_SCALE;
pango_layout_iter_free (iter);
ctx->render->render_pango_layout (ctx, layout, *x, *y - baseline);
*x += w / (double)PANGO_SCALE;
g_object_unref (layout);
g_object_unref (context);
}
void
x11_draw_layout_with_colors( Drawable drawable,
GC gc,
int x,
int y,
PangoLayout *layout,
wxColour &colour )
{
PangoLayoutIter *iter = pango_layout_get_iter (layout);
do
{
PangoLayoutLine *line = pango_layout_iter_get_line (iter);
PangoRectangle logical_rect;
pango_layout_iter_get_line_extents (iter, NULL, &logical_rect);
int baseline = pango_layout_iter_get_baseline (iter);
x11_draw_layout_line_with_colors( drawable, gc,
x + logical_rect.x / PANGO_SCALE,
y + baseline / PANGO_SCALE,
line,
colour );
} while (pango_layout_iter_next_line (iter));
pango_layout_iter_free (iter);
}
static void
draw_page (GtkPrintOperation *operation,
GtkPrintContext *context,
int page_nr,
PrintData *print_data)
{
cairo_t *cr;
GList *pagebreak;
int start, end, i;
PangoLayoutIter *iter;
double start_pos;
if (page_nr == 0)
start = 0;
else
{
pagebreak = g_list_nth (print_data->page_breaks, page_nr - 1);
start = GPOINTER_TO_INT (pagebreak->data);
}
pagebreak = g_list_nth (print_data->page_breaks, page_nr);
if (pagebreak == NULL)
end = pango_layout_get_line_count (print_data->layout);
else
end = GPOINTER_TO_INT (pagebreak->data);
cr = gtk_print_context_get_cairo_context (context);
cairo_set_source_rgb (cr, 0, 0, 0);
i = 0;
start_pos = 0;
iter = pango_layout_get_iter (print_data->layout);
do
{
PangoRectangle logical_rect;
PangoLayoutLine *line;
int baseline;
if (i >= start)
{
line = pango_layout_iter_get_line (iter);
pango_layout_iter_get_line_extents (iter, NULL, &logical_rect);
baseline = pango_layout_iter_get_baseline (iter);
if (i == start)
start_pos = logical_rect.y / 1024.0;
cairo_move_to (cr, logical_rect.x / 1024.0, baseline / 1024.0 - start_pos);
pango_cairo_show_layout_line (cr, line);
}
i++;
}
while (i < end &&
pango_layout_iter_next_line (iter));
pango_layout_iter_free (iter);
}
/** Get size information for the given string, font and height.
*
* @returns an array of offsets of the individual glyphs in the layout.
*/
real*
dia_font_get_sizes(const char* string, DiaFont *font, real height,
real *width, real *ascent, real *descent, int *n_offsets,
PangoLayoutLine **layout_offsets)
{
PangoLayout* layout;
PangoLayoutIter* iter;
real top, bline, bottom;
const gchar* non_empty_string;
PangoRectangle ink_rect,logical_rect;
real* offsets = NULL; /* avoid: 'offsets' may be used uninitialized in this function */
/* We need some reasonable ascent/descent values even for empty strings. */
if (string == NULL || string[0] == '\0') {
non_empty_string = "XjgM149";
} else {
non_empty_string = string;
}
layout = dia_font_build_layout(non_empty_string, font, height * global_zoom_factor);
/* Only one line here ? */
iter = pango_layout_get_iter(layout);
pango_layout_iter_get_line_extents(iter, &ink_rect, &logical_rect);
top = pdu_to_dcm(logical_rect.y) / global_zoom_factor;
bottom = pdu_to_dcm(logical_rect.y + logical_rect.height) / global_zoom_factor;
bline = pdu_to_dcm(pango_layout_iter_get_baseline(iter)) / global_zoom_factor;
get_string_offsets(iter, &offsets, n_offsets);
get_layout_offsets(pango_layout_get_line(layout, 0), layout_offsets);
/* FIXME: the above assumption of 'one line' is wrong. At least calculate the overall width correctly
* to avoid text overflowing its box, like in bug #482585 */
while (pango_layout_iter_next_line (iter)) {
PangoRectangle more_ink_rect, more_logical_rect;
pango_layout_iter_get_line_extents(iter, &more_ink_rect, &more_logical_rect);
if (more_logical_rect.width > logical_rect.width)
logical_rect.width = more_logical_rect.width;
/* also calculate for the ink rect (true space needed for drawing the glyphs) */
if (more_ink_rect.width > ink_rect.width)
ink_rect.width = more_ink_rect.width;
}
pango_layout_iter_free(iter);
g_object_unref(G_OBJECT(layout));
*ascent = bline-top;
*descent = bottom-bline;
if (non_empty_string != string) {
*width = 0.0;
} else {
/* take the bigger rectangle to avoid cutting of any part of the string */
*width = pdu_to_dcm(logical_rect.width > ink_rect.width ? logical_rect.width : ink_rect.width) / global_zoom_factor;
}
return offsets;
}
void GetTextExtent( const wxFont& font, const wxString& str, wxCoord *width, wxCoord *height,
wxCoord *descent, wxCoord *externalLeading )
{
if ( width )
*width = 0;
if ( height )
*height = 0;
if ( descent )
*descent = 0;
if ( externalLeading )
*externalLeading = 0;
if (str.empty())
return;
PangoContext* context = gdk_pango_context_get_for_screen( gdk_screen_get_default() );
PangoLayout* m_layout = pango_layout_new(context);
// and use it if it's valid
if ( font != wxNullFont )
{
pango_layout_set_font_description
(
m_layout,
font.GetNativeFontInfo()->description
);
}
// Set layout's text
const wxCharBuffer dataUTF8 = wxConvUTF8.cWX2MB(str);
if ( !dataUTF8 )
{
// hardly ideal, but what else can we do if conversion failed?
return;
}
pango_layout_set_text( m_layout, dataUTF8, strlen(dataUTF8) );
if (descent)
{
int h;
pango_layout_get_pixel_size( m_layout, width, &h );
PangoLayoutIter *iter = pango_layout_get_iter(m_layout);
int baseline = pango_layout_iter_get_baseline(iter);
pango_layout_iter_free(iter);
*descent = h - PANGO_PIXELS(baseline);
if (height)
*height = (wxCoord) h;
}
else
{
pango_layout_get_pixel_size( m_layout, width, height );
}
// Reset old font description
//if (font != wxNullFont)
// pango_layout_set_font_description( m_layout, m_fontdesc );
}
// Notice we don't check here the font. It is supposed to be OK before the call.
void wxTextMeasure::DoGetTextExtent(const wxString& string,
wxCoord *width,
wxCoord *height,
wxCoord *descent,
wxCoord *externalLeading)
{
if ( !m_context )
{
if ( width )
*width = 0;
if ( height )
*height = 0;
return;
}
// Set layout's text
const wxCharBuffer dataUTF8 = wxGTK_CONV_FONT(string, GetFont());
if ( !dataUTF8 )
{
// hardly ideal, but what else can we do if conversion failed?
wxLogLastError(wxT("GetTextExtent"));
return;
}
pango_layout_set_text(m_layout, dataUTF8, -1);
if ( m_dc )
{
// in device units
pango_layout_get_pixel_size(m_layout, width, height);
}
else // win
{
// the logical rect bounds the ink rect
PangoRectangle rect;
pango_layout_get_extents(m_layout, NULL, &rect);
*width = PANGO_PIXELS(rect.width);
*height = PANGO_PIXELS(rect.height);
}
if (descent)
{
PangoLayoutIter *iter = pango_layout_get_iter(m_layout);
int baseline = pango_layout_iter_get_baseline(iter);
pango_layout_iter_free(iter);
*descent = *height - PANGO_PIXELS(baseline);
}
if (externalLeading)
{
// No support for MSW-like "external leading" in Pango.
*externalLeading = 0;
}
}
void computeLayout(PangoLayout *layout, char *utf8, int utf8Length, int *wPtr, int *hPtr, int *xOffsetPtr, int *yOffsetPtr, int *layoutDetailsPtr) {
PangoRectangle inkRect, logicalRect;
int left, top, right, bottom, baseline;
PangoLayoutIter *iter;
if (fontDescr == NULL) unicodeSetFont("Verdana", 18, 0, 0, 1);
pango_cairo_context_set_font_options(pango_layout_get_context(layout), fontOptions);
pango_layout_set_font_description(layout, fontDescr);
pango_layout_set_text(layout, utf8, utf8Length);
pango_layout_get_pixel_extents(layout, &inkRect, &logicalRect);
left = (inkRect.x < logicalRect.x) ? inkRect.x : logicalRect.x;
top = (inkRect.y < logicalRect.y) ? inkRect.y : logicalRect.y;
right = inkRect.x + inkRect.width;
if ((logicalRect.x + logicalRect.width) > right) right = logicalRect.x + logicalRect.width;
bottom = inkRect.y + inkRect.height;
if ((logicalRect.y + logicalRect.height) > bottom) bottom = logicalRect.y + logicalRect.height;
iter = pango_layout_get_iter(layout);
baseline = PANGO_PIXELS(pango_layout_iter_get_baseline(iter));
pango_layout_iter_free(iter);
if (left < 0) {
inkRect.x = inkRect.x - left;
logicalRect.x = logicalRect.x - left;
}
if (top < 0) {
inkRect.y = inkRect.y - top;
logicalRect.y = logicalRect.y - top;
baseline = baseline - top;
}
if (layoutDetailsPtr != NULL) {
layoutDetailsPtr[0] = inkRect.x;
layoutDetailsPtr[1] = inkRect.y;
layoutDetailsPtr[2] = inkRect.width;
layoutDetailsPtr[3] = inkRect.height;
layoutDetailsPtr[4] = logicalRect.x;
layoutDetailsPtr[5] = logicalRect.y;
layoutDetailsPtr[6] = logicalRect.width;
layoutDetailsPtr[7] = logicalRect.height;
layoutDetailsPtr[8] = baseline;
}
*wPtr = right - left;
*hPtr = bottom - top;
*xOffsetPtr = left < 0 ? -left : 0;
*yOffsetPtr = top < 0 ? -top : 0;
}
static void
fo_doc_cairo_do_callbacks (cairo_t *cr,
PangoLayout *layout,
gint line_first,
gint line_last,
gint x,
gint y)
{
PangoLayoutIter *iter;
g_return_if_fail (cr != NULL);
g_return_if_fail (PANGO_IS_LAYOUT (layout));
g_return_if_fail (line_first >= 0);
/*g_return_if_fail (line_last >= line_first &&
line_last <= g_slist_length (pango_layout_get_lines (layout)) - 1);*/
iter = pango_layout_get_iter (layout);
gint line_number = -1;
do
{
PangoRectangle logical_rect;
PangoLayoutLine *line;
int baseline;
line_number++;
if (line_number < line_first)
{
continue;
}
line = pango_layout_iter_get_line (iter);
pango_layout_iter_get_line_extents (iter, NULL, &logical_rect);
baseline = pango_layout_iter_get_baseline (iter);
fo_doc_cairo_do_line_callbacks (cr,
line,
x + logical_rect.x,
y - baseline);
if (line_number >= line_last)
{
break;
}
}
while (pango_layout_iter_next_line (iter));
pango_layout_iter_free (iter);
}
static gint
get_label_line_height (GtkWidget *label)
{
PangoLayout *layout;
PangoLayoutIter *iter;
PangoRectangle rect;
layout = gtk_label_get_layout (GTK_LABEL (label));
iter = pango_layout_get_iter (layout);
pango_layout_iter_get_line_extents (iter, NULL, &rect);
pango_layout_iter_free (iter);
return (rect.y + rect.height) / PANGO_SCALE;
}
void
pango_clutter_ensure_glyph_cache_for_layout (PangoLayout *layout)
{
PangoContext *context;
PangoFontMap *fontmap;
PangoRenderer *renderer;
PangoLayoutIter *iter;
g_return_if_fail (PANGO_IS_LAYOUT (layout));
context = pango_layout_get_context (layout);
fontmap = pango_context_get_font_map (context);
g_return_if_fail (PANGO_CLUTTER_IS_FONT_MAP (fontmap));
renderer = _pango_clutter_font_map_get_renderer
(PANGO_CLUTTER_FONT_MAP (fontmap));
if ((iter = pango_layout_get_iter (layout)) == NULL)
return;
do
{
PangoLayoutLine *line;
GSList *l;
line = pango_layout_iter_get_line_readonly (iter);
for (l = line->runs; l; l = l->next)
{
PangoLayoutRun *run = l->data;
PangoGlyphString *glyphs = run->glyphs;
int i;
for (i = 0; i < glyphs->num_glyphs; i++)
{
PangoGlyphInfo *gi = &glyphs->glyphs[i];
if (!run->item->analysis.font)
/* Font not found */
continue;
pango_clutter_renderer_get_cached_glyph (renderer,
run->item->analysis.font,
gi->glyph);
}
}
}
while (pango_layout_iter_next_line (iter));
pango_layout_iter_free (iter);
}
/**
* pango_renderer_draw_layout:
* @renderer: a #PangoRenderer
* @layout: a #PangoLayout
* @x: X position of left edge of baseline, in user space coordinates
* in Pango units.
* @y: Y position of left edge of baseline, in user space coordinates
* in Pango units.
*
* Draws @layout with the specified #PangoRenderer.
*
* Since: 1.8
**/
void
pango_renderer_draw_layout (PangoRenderer *renderer,
PangoLayout *layout,
int x,
int y)
{
PangoLayoutIter *iter;
g_return_if_fail (PANGO_IS_RENDERER (renderer));
g_return_if_fail (PANGO_IS_LAYOUT (layout));
/* We only change the matrix if the renderer isn't already
* active.
*/
if (!renderer->active_count)
{
PangoContext *context = pango_layout_get_context (layout);
pango_renderer_set_matrix (renderer,
pango_context_get_matrix (context));
}
pango_renderer_activate (renderer);
iter = pango_layout_get_iter (layout);
do
{
PangoRectangle logical_rect;
PangoLayoutLine *line;
int baseline;
line = pango_layout_iter_get_line_readonly (iter);
pango_layout_iter_get_line_extents (iter, NULL, &logical_rect);
baseline = pango_layout_iter_get_baseline (iter);
pango_renderer_draw_layout_line (renderer,
line,
x + logical_rect.x,
y + baseline);
}
while (pango_layout_iter_next_line (iter));
pango_layout_iter_free (iter);
pango_renderer_deactivate (renderer);
}
void text_widget_set_text ( struct TEXT_WIDGET_HANDLE handle,
const char* text, int length )
{
if ( handle.d == NULL || handle.d->layout == NULL )
return;
pango_layout_set_markup( handle.d->layout, text, length );
// The idea here is to make sure that the VGFont contains
// all the glyphs at the proper size so that when we want
// to draw, we can can just call vgDrawGlyphs (well, maybe
// not since PangoGlyphInfo is not an array of glyph
// indexes; aww).
PangoLayoutIter* li = pango_layout_get_iter( handle.d->layout );
do {
PangoLayoutRun* run = pango_layout_iter_get_run( li );
if ( run == NULL )
continue;
PangoFont* font = run->item->analysis.font;
// Well, you can see how C is not the most ideal language for
// abstraction. Have to read the documentation to discover
// that this font is a PangoFcFont.
FT_Face face = pango_fc_font_lock_face( (PangoFcFont*)font );
if ( face != NULL ) {
struct VG_DATA* vg_data = face->size->generic.data;
if ( vg_data == NULL ) {
vg_data = vg_data_new();
face->size->generic.data = vg_data;
face->size->generic.finalizer = vg_data_free;
}
int g;
for ( g = 0; g < run->glyphs->num_glyphs; g++ ) {
int byte = run->glyphs->glyphs[g].glyph / 8;
int bit = 1 << ( run->glyphs->glyphs[g].glyph & 0x7 );
if ( ! ( vg_data->cmap[byte] & bit ) ) {
vg_data->cmap[byte] |= bit;
add_char( vg_data->font, face, run->glyphs->glyphs[g].glyph );
}
}
pango_fc_font_unlock_face( (PangoFcFont*)font );
}
} while ( pango_layout_iter_next_run( li ) );
pango_layout_iter_free( li );
}
static void
dump_lines (PangoLayout *layout, GString *string)
{
PangoLayoutIter *iter;
const gchar *text;
gint index, index2;
gboolean has_more;
gchar *char_str;
gint i;
PangoLayoutLine *line;
text = pango_layout_get_text (layout);
iter = pango_layout_get_iter (layout);
has_more = TRUE;
index = pango_layout_iter_get_index (iter);
i = 0;
while (has_more)
{
line = pango_layout_iter_get_line (iter);
has_more = pango_layout_iter_next_line (iter);
i++;
if (has_more)
{
index2 = pango_layout_iter_get_index (iter);
char_str = g_strndup (text + index, index2 - index);
}
else
{
char_str = g_strdup (text + index);
}
g_string_append_printf (string, "i=%d, index=%d, paragraph-start=%d, dir=%s '%s'\n",
i, index, line->is_paragraph_start, direction_name (line->resolved_dir),
char_str);
g_free (char_str);
index = index2;
}
pango_layout_iter_free (iter);
}
void gtk_glwidget_create_font(){
PangoFontDescription *font_desc;
PangoLayout *layout;
PangoRectangle log_rect;
int font_ascent_pango_units;
int font_descent_pango_units;
if ( _debug_font_created ) {
Error( "Programming error: gtk_glwidget_create_font() was already called; "
"you must call gtk_glwidget_destroy_font() before creating font again" );
}
_debug_font_created = 1;
font_map = pango_ft2_font_map_new();
pango_ft2_font_map_set_resolution( PANGO_FT2_FONT_MAP( font_map ), 72, 72 );
ft2_context = pango_font_map_create_context( PANGO_FONT_MAP( font_map ));
font_desc = pango_font_description_from_string( font_string );
pango_font_description_set_size( font_desc, font_height * PANGO_SCALE );
pango_context_set_font_description( ft2_context, font_desc );
pango_font_description_free( font_desc );
layout = pango_layout_new( ft2_context );
// I don't believe that's standard preprocessor syntax?
#if !PANGO_VERSION_CHECK( 1,22,0 )
PangoLayoutIter *iter;
iter = pango_layout_get_iter( layout );
font_ascent_pango_units = pango_layout_iter_get_baseline( iter );
pango_layout_iter_free( iter );
#else
font_ascent_pango_units = pango_layout_get_baseline( layout );
#endif
pango_layout_get_extents( layout, NULL, &log_rect );
g_object_unref( G_OBJECT( layout ) );
font_descent_pango_units = log_rect.height - font_ascent_pango_units;
font_ascent = PANGO_PIXELS_CEIL( font_ascent_pango_units );
font_descent = PANGO_PIXELS_CEIL( font_descent_pango_units );
y_offset_bitmap_render_pango_units = ( font_ascent * PANGO_SCALE ) - font_ascent_pango_units;
}
/**
* gdk_pango_layout_get_clip_region: (skip)
* @layout: a #PangoLayout
* @x_origin: X pixel where you intend to draw the layout with this clip
* @y_origin: Y pixel where you intend to draw the layout with this clip
* @index_ranges: array of byte indexes into the layout, where even members of array are start indexes and odd elements are end indexes
* @n_ranges: number of ranges in @index_ranges, i.e. half the size of @index_ranges
*
* Obtains a clip region which contains the areas where the given ranges
* of text would be drawn. @x_origin and @y_origin are the top left point
* to center the layout. @index_ranges should contain
* ranges of bytes in the layout's text.
*
* Note that the regions returned correspond to logical extents of the text
* ranges, not ink extents. So the drawn layout may in fact touch areas out of
* the clip region. The clip region is mainly useful for highlightling parts
* of text, such as when text is selected.
*
* Return value: a clip region containing the given ranges
**/
cairo_region_t*
gdk_pango_layout_get_clip_region (PangoLayout *layout,
gint x_origin,
gint y_origin,
const gint *index_ranges,
gint n_ranges)
{
PangoLayoutIter *iter;
cairo_region_t *clip_region;
g_return_val_if_fail (PANGO_IS_LAYOUT (layout), NULL);
g_return_val_if_fail (index_ranges != NULL, NULL);
clip_region = cairo_region_create ();
iter = pango_layout_get_iter (layout);
do
{
PangoRectangle logical_rect;
cairo_region_t *line_region;
gint baseline;
pango_layout_iter_get_line_extents (iter, NULL, &logical_rect);
baseline = pango_layout_iter_get_baseline (iter);
line_region = layout_iter_get_line_clip_region(iter,
x_origin + PANGO_PIXELS (logical_rect.x),
y_origin + PANGO_PIXELS (baseline),
index_ranges,
n_ranges);
cairo_region_union (clip_region, line_region);
cairo_region_destroy (line_region);
}
while (pango_layout_iter_next_line (iter));
pango_layout_iter_free (iter);
return clip_region;
}
bool wxTextMeasure::DoGetPartialTextExtents(const wxString& text,
wxArrayInt& widths,
double scaleX)
{
if ( !m_layout )
return wxTextMeasureBase::DoGetPartialTextExtents(text, widths, scaleX);
// Set layout's text
const wxCharBuffer dataUTF8 = wxGTK_CONV_FONT(text, GetFont());
if ( !dataUTF8 )
{
// hardly ideal, but what else can we do if conversion failed?
wxLogLastError(wxT("GetPartialTextExtents"));
return false;
}
pango_layout_set_text(m_layout, dataUTF8, -1);
// Calculate the position of each character based on the widths of
// the previous characters
// Code borrowed from Scintilla's PlatGTK
PangoLayoutIter *iter = pango_layout_get_iter(m_layout);
PangoRectangle pos;
pango_layout_iter_get_cluster_extents(iter, NULL, &pos);
size_t i = 0;
while (pango_layout_iter_next_cluster(iter))
{
pango_layout_iter_get_cluster_extents(iter, NULL, &pos);
int position = PANGO_PIXELS(pos.x);
widths[i++] = position;
}
const size_t len = text.length();
while (i < len)
widths[i++] = PANGO_PIXELS(pos.x + pos.width);
pango_layout_iter_free(iter);
return true;
}
JNIEXPORT void JNICALL
Java_gnu_java_awt_peer_gtk_GdkGraphics_drawString
(JNIEnv *env, jobject obj, jobject font, jstring str, jint x, jint y)
{
struct peerfont *pfont = NULL;
struct graphics *g;
const char *cstr;
int baseline_y;
PangoLayoutIter *iter;
g = (struct graphics *) NSA_GET_PTR (env, obj);
g_assert (g != NULL);
pfont = (struct peerfont *)NSA_GET_FONT_PTR (env, font);
g_assert (pfont != NULL);
cstr = (*env)->GetStringUTFChars (env, str, NULL);
gdk_threads_enter ();
pango_layout_set_font_description (pfont->layout, pfont->desc);
pango_layout_set_text (pfont->layout, cstr, -1);
iter = pango_layout_get_iter (pfont->layout);
baseline_y = pango_layout_iter_get_baseline (iter);
gdk_draw_layout (g->drawable, g->gc,
x + g->x_offset,
y + g->y_offset - PANGO_PIXELS (baseline_y),
pfont->layout);
pango_layout_iter_free (iter);
pango_layout_set_text (pfont->layout, "", -1);
gdk_flush ();
gdk_threads_leave ();
(*env)->ReleaseStringUTFChars (env, str, cstr);
}
static gboolean
gw_spellcheck_get_line_coordinates (GwSpellcheck *spellcheck, int startindex, int endindex, int *x, int *y, int *x2, int *y2)
{
//Declarations
GwSpellcheckPrivate *priv;
int index;
PangoLayout *layout;
PangoRectangle rect;
PangoLayoutIter *iter;
int xoffset, yoffset;
//Initializations
priv = spellcheck->priv;
layout = gtk_entry_get_layout (priv->entry);
iter = pango_layout_get_iter (layout);
xoffset = gw_spellcheck_get_layout_x_offset (spellcheck);
yoffset = gw_spellcheck_get_layout_y_offset (spellcheck);
*x = *y = *x2 = *y2 = 0;
do {
index = pango_layout_iter_get_index (iter);
pango_layout_iter_get_char_extents (iter, &rect);
if (index == startindex)
{
*x = PANGO_PIXELS (rect.x) + xoffset;
*y = PANGO_PIXELS (rect.y + rect.height) + yoffset;
}
if (index == endindex - 1)
{
*x2 = PANGO_PIXELS (rect.width + rect.x) + xoffset + 1;
*y2 = *y;
}
} while (pango_layout_iter_next_char (iter));
//Cleanup
pango_layout_iter_free (iter);
return (*x > 0 && *y > 0 && *x2 > 0 && *y2 > 0);
}
void
x11_draw_layout_with_colors( Drawable drawable,
GC gc,
int x,
int y,
PangoLayout *layout,
wxColour &colour )
{
PangoLayoutIter *iter = pango_layout_get_iter (layout);
#if defined(__INTEL_COMPILER) && 1 /* VDM auto patch */
# pragma ivdep
# pragma swp
# pragma unroll
# pragma prefetch
# if 0
# pragma simd noassert
# endif
#endif /* VDM auto patch */
do
{
PangoLayoutLine *line = pango_layout_iter_get_line (iter);
PangoRectangle logical_rect;
pango_layout_iter_get_line_extents (iter, NULL, &logical_rect);
int baseline = pango_layout_iter_get_baseline (iter);
x11_draw_layout_line_with_colors( drawable, gc,
x + logical_rect.x / PANGO_SCALE,
y + baseline / PANGO_SCALE,
line,
colour );
} while (pango_layout_iter_next_line (iter));
pango_layout_iter_free (iter);
}
/**
* gdk_pango_layout_line_get_clip_region: (skip)
* @line: a #PangoLayoutLine
* @x_origin: X pixel where you intend to draw the layout line with this clip
* @y_origin: baseline pixel where you intend to draw the layout line with this clip
* @index_ranges: (array): array of byte indexes into the layout,
* where even members of array are start indexes and odd elements
* are end indexes
* @n_ranges: number of ranges in @index_ranges, i.e. half the size of @index_ranges
*
* Obtains a clip region which contains the areas where the given
* ranges of text would be drawn. @x_origin and @y_origin are the top left
* position of the layout. @index_ranges
* should contain ranges of bytes in the layout's text. The clip
* region will include space to the left or right of the line (to the
* layout bounding box) if you have indexes above or below the indexes
* contained inside the line. This is to draw the selection all the way
* to the side of the layout. However, the clip region is in line coordinates,
* not layout coordinates.
*
* Note that the regions returned correspond to logical extents of the text
* ranges, not ink extents. So the drawn line may in fact touch areas out of
* the clip region. The clip region is mainly useful for highlightling parts
* of text, such as when text is selected.
*
* Return value: a clip region containing the given ranges
**/
cairo_region_t*
gdk_pango_layout_line_get_clip_region (PangoLayoutLine *line,
gint x_origin,
gint y_origin,
const gint *index_ranges,
gint n_ranges)
{
cairo_region_t *clip_region;
PangoLayoutIter *iter;
g_return_val_if_fail (line != NULL, NULL);
g_return_val_if_fail (index_ranges != NULL, NULL);
iter = pango_layout_get_iter (line->layout);
while (pango_layout_iter_get_line_readonly (iter) != line)
pango_layout_iter_next_line (iter);
clip_region = layout_iter_get_line_clip_region(iter, x_origin, y_origin, index_ranges, n_ranges);
pango_layout_iter_free (iter);
return clip_region;
}
static void
pango_draw (Lisp_Font *f, char *string, size_t length,
Window id, GC gc, Lisp_Color *fg, int x, int y)
{
static XftDraw *draw;
XftColor xft_color;
PangoLayout *layout;
PangoLayoutIter *iter;
if (draw == 0)
draw = XftDrawCreate (dpy, id, image_visual, image_cmap);
else
XftDrawChange (draw, id);
xft_color.pixel = fg->pixel;
xft_color.color.red = fg->red;
xft_color.color.green = fg->green;
xft_color.color.blue = fg->blue;
xft_color.color.alpha = fg->alpha;
layout = pango_layout_new (pango_context);
pango_layout_set_font_description(layout, f->font);
pango_layout_set_text (layout, string, length);
iter = pango_layout_get_iter (layout);
do {
PangoLayoutLine *line = pango_layout_iter_get_line (iter);
PangoRectangle rect;
pango_layout_iter_get_line_extents (iter, NULL, &rect);
pango_draw_line (draw, id, gc, &xft_color,
line, x + rect.x / PANGO_SCALE, y);
} while (pango_layout_iter_next_line (iter));
g_object_unref (layout);
pango_layout_iter_free (iter);
}
void
rsvg_text_render_text (RsvgDrawingCtx * ctx, const char *text, gdouble * x, gdouble * y)
{
PangoContext *context;
PangoLayout *layout;
PangoLayoutIter *iter;
RsvgState *state;
gint w, h, offsetX, offsetY;
state = rsvg_current_state (ctx);
/* Do not render the text if the font size is zero. See bug #581491. */
if (state->font_size.length == 0)
return;
context = ctx->render->create_pango_context (ctx);
layout = rsvg_text_create_layout (ctx, state, text, context);
pango_layout_get_size (layout, &w, &h);
iter = pango_layout_get_iter (layout);
if (PANGO_GRAVITY_IS_VERTICAL (state->text_gravity)) {
offsetX = -pango_layout_iter_get_baseline (iter) / (double)PANGO_SCALE;
offsetY = 0;
} else {
offsetX = 0;
offsetY = pango_layout_iter_get_baseline (iter) / (double)PANGO_SCALE;
}
pango_layout_iter_free (iter);
ctx->render->render_pango_layout (ctx, layout, *x - offsetX, *y - offsetY);
if (PANGO_GRAVITY_IS_VERTICAL (state->text_gravity))
*y += w / (double)PANGO_SCALE;
else
*x += w / (double)PANGO_SCALE;
g_object_unref (layout);
g_object_unref (context);
}
void
gnm_rendered_value_remeasure (GnmRenderedValue *rv)
{
if (rv->rotation) {
GnmRenderedRotatedValue *rrv = (GnmRenderedRotatedValue *)rv;
PangoContext *context = pango_layout_get_context (rv->layout);
double sin_a, abs_sin_a, cos_a;
int sdx = 0;
int x0 = 0, x1 = 0;
PangoLayoutIter *iter;
int l = 0;
int lwidth;
sin_a = rrv->rotmat.xy;
abs_sin_a = fabs (sin_a);
cos_a = rrv->rotmat.xx;
pango_context_set_matrix (context, &rrv->rotmat);
pango_layout_context_changed (rv->layout);
rrv->linecount = pango_layout_get_line_count (rv->layout);
rrv->lines = g_new (struct GnmRenderedRotatedValueInfo, rrv->linecount);
pango_layout_get_size (rv->layout, &lwidth, NULL);
rv->layout_natural_height = 0;
iter = pango_layout_get_iter (rv->layout);
do {
PangoRectangle logical;
int x, dx, dy, indent;
int h, ytop, ybot, baseline;
pango_layout_iter_get_line_extents (iter, NULL, &logical);
pango_layout_iter_get_line_yrange (iter, &ytop, &ybot);
baseline = pango_layout_iter_get_baseline (iter);
indent = logical.x;
if (sin_a < 0)
indent -= lwidth;
if (l == 0 && rv->noborders)
sdx = (int)(baseline * sin_a - ybot / sin_a);
dx = sdx + (int)(ybot / sin_a + indent * cos_a);
dy = (int)((baseline - ybot) * cos_a - indent * sin_a);
rrv->lines[l].dx = dx;
rrv->lines[l].dy = dy;
/* Left edge. */
x = dx - (int)((baseline - ytop) * sin_a);
x0 = MIN (x0, x);
/* Right edge. */
x = dx + (int)(logical.width * cos_a + (ybot - baseline) * sin_a);
x1 = MAX (x1, x);
h = logical.width * abs_sin_a + logical.height * cos_a;
if (h > rv->layout_natural_height)
rv->layout_natural_height = h;
l++;
} while (pango_layout_iter_next_line (iter));
pango_layout_iter_free (iter);
rv->layout_natural_width = x1 - x0;
if (sin_a < 0) {
int dx = rv->layout_natural_width;
for (l = 0; l < rrv->linecount; l++)
rrv->lines[l].dx += dx;
}
for (l = 0; l < rrv->linecount; l++)
rrv->lines[l].dy += rv->layout_natural_height;
#if 0
g_print ("Natural size: %d x %d\n", rv->layout_natural_width, rv->layout_natural_height);
#endif
pango_context_set_matrix (context, NULL);
pango_layout_context_changed (rv->layout);
} else
void text_wrapper::DoLayout(void)
{
// THE function
// first some sanity checks
if ( default_font == NULL ) return;
if ( uni32_length <= 0 || utf8_length <= 0 ) return;
// prepare the pangolayout object
{
//char *tc = pango_font_description_to_string(default_font->descr);
//printf("layout with %s\n", tc);
//free(tc);
}
pango_layout_set_font_description(pLayout, default_font->descr);
pango_layout_set_text(pLayout, utf8_text, utf8_length);
// reset the glyph string
if ( glyph_text ) free(glyph_text);
glyph_text = NULL;
glyph_length = 0;
double pango_to_ink = (1.0 / ((double)PANGO_SCALE)); // utility
int max_g = 0;
PangoLayoutIter *pIter = pango_layout_get_iter(pLayout); // and go!
do {
PangoLayoutLine *pLine = pango_layout_iter_get_line(pIter); // no need for unref
int plOffset = pLine->start_index; // start of the line in the uni32_text
PangoRectangle ink_r, log_r;
pango_layout_iter_get_line_extents(pIter, &ink_r, &log_r);
double plY = (1.0 / ((double)PANGO_SCALE)) * ((double)log_r.y); // start position of this line of the layout
double plX = (1.0 / ((double)PANGO_SCALE)) * ((double)log_r.x);
GSList *curR = pLine->runs; // get ready to iterate over the runs of this line
while ( curR ) {
PangoLayoutRun *pRun = (PangoLayoutRun*)curR->data;
if ( pRun ) {
int prOffset = pRun->item->offset; // start of the run in the line
// a run has uniform font/directionality/etc...
int o_g_l = glyph_length; // save the index of the first glyph we'll add
for (int i = 0; i < pRun->glyphs->num_glyphs; i++) { // add glyph sequentially, reading them from the run
// realloc the structures
if ( glyph_length >= max_g ) {
max_g = 2 * glyph_length + 1;
one_glyph *newdata = static_cast<one_glyph*>(realloc(glyph_text, (max_g + 1) * sizeof(one_glyph)));
if (newdata != NULL)
{
glyph_text = newdata;
}
else
{
g_warning("Failed to reallocate glyph_text");
}
}
// fill the glyph info
glyph_text[glyph_length].font = pRun->item->analysis.font;
glyph_text[glyph_length].gl = pRun->glyphs->glyphs[i].glyph;
glyph_text[glyph_length].uni_st = plOffset + prOffset + pRun->glyphs->log_clusters[i];
// depending on the directionality, the last uni32 codepoint for this glyph is the first of the next char
// or the first of the previous
if ( pRun->item->analysis.level == 1 ) {
// rtl
if ( i < pRun->glyphs->num_glyphs - 1 ) {
glyph_text[glyph_length + 1].uni_en = glyph_text[glyph_length].uni_st;
}
glyph_text[glyph_length].uni_dir = 1;
glyph_text[glyph_length + 1].uni_dir = 1; // set the directionality for the next too, so that the last glyph in
// the array has the correct direction
} else {
// ltr
if ( i > 0 ) {
glyph_text[glyph_length - 1].uni_en = glyph_text[glyph_length].uni_st;
}
glyph_text[glyph_length].uni_dir = 0;
glyph_text[glyph_length + 1].uni_dir = 0;
}
// set the position
// the layout is an infinite line
glyph_text[glyph_length].x = plX + pango_to_ink * ((double)pRun->glyphs->glyphs[i].geometry.x_offset);
glyph_text[glyph_length].y = plY + pango_to_ink * ((double)pRun->glyphs->glyphs[i].geometry.y_offset);
// advance to the next glyph
plX += pango_to_ink * ((double)pRun->glyphs->glyphs[i].geometry.width);
// and set the next glyph's position, in case it's the terminating glyph
glyph_text[glyph_length + 1].x = plX;
glyph_text[glyph_length + 1].y = plY;
glyph_length++;
}
// and finish filling the info
// notably, the uni_en of the last char in ltr text and the uni_en of the first in rtl are still not set
if ( pRun->item->analysis.level == 1 ) {
// rtl
if ( glyph_length > o_g_l ) glyph_text[o_g_l].uni_en = plOffset + prOffset + pRun->item->length;
} else {
if ( glyph_length > 0 ) glyph_text[glyph_length - 1].uni_en = plOffset + prOffset + pRun->item->length;
}
// the terminating glyph has glyph_id=0 because it means 'no glyph'
glyph_text[glyph_length].gl = 0;
// and is associated with no text (but you cannot set uni_st=uni_en=0, because the termination
// is expected to be the glyph for the termination of the uni32_text)
glyph_text[glyph_length].uni_st = glyph_text[glyph_length].uni_en = plOffset + prOffset + pRun->item->length;
}
curR = curR->next;
}
} while ( pango_layout_iter_next_line(pIter) );
pango_layout_iter_free(pIter);
// grunt work done. now some additional info for layout: computing letters, mostly (one letter = several glyphs sometimes)
PangoLogAttr *pAttrs = NULL;
int nbAttr = 0;
// get the layout attrs, they hold the boundaries pango computed
pango_layout_get_log_attrs(pLayout, &pAttrs, &nbAttr);
// feed to MakeTextBoundaries which knows what to do with these
MakeTextBoundaries(pAttrs, nbAttr);
// the array of boundaries is full, but out-of-order
SortBoundaries();
// boundary array is ready to be used, call chunktext to fill the *_start fields of the glyphs, and compute
// the boxed version of the text for sp-typeset
ChunkText();
// get rid of the attributes
if ( pAttrs ) g_free(pAttrs);
// cleaning up
for (int i = 0; i < glyph_length; i++) {
glyph_text[i].uni_st = uni32_codepoint[glyph_text[i].uni_st];
glyph_text[i].uni_en = uni32_codepoint[glyph_text[i].uni_en];
glyph_text[i].x /= 512; // why is this not default_font->parent->fontsize?
glyph_text[i].y /= 512;
}
if ( glyph_length > 0 ) {
glyph_text[glyph_length].x /= 512;
glyph_text[glyph_length].y /= 512;
}
}
static void
schgui_cairo_drafter_draw_text(SchGUICairoDrafter *drafter, const struct _SchText *text)
{
if (text != NULL)
{
int visible;
sch_text_get_visible(text, &visible);
if (visible)
{
SchGUICairoDrafterPrivate *privat = SCHGUI_CAIRO_DRAFTER_GET_PRIVATE(drafter);
if (privat->cairo != NULL)
{
PangoLayout *layout;
SchMultiline *multiline = sch_text_get_multiline(text);
int point_size = sch_text_get_size(text);
float height;
int alignment;
cairo_font_options_t *options;
PangoContext *context;
int baseline;
PangoLayoutIter *iter;
int index;
int show;
SchGUIDrawingCfgColor color;
int enabled;
sch_text_get_color(text, &index);
enabled = schgui_drawing_cfg_get_color(privat->config, index, &color);
if (enabled)
{
if (0) /* show ink rect */
{
GeomBounds bounds;
int success;
success = schgui_cairo_drafter_text_bounds(drafter, text, &bounds);
if (success)
{
cairo_set_source_rgb(privat->cairo, 1.0, 0, 0);
cairo_move_to(privat->cairo, bounds.min_x, bounds.min_y);
cairo_line_to(privat->cairo, bounds.max_x, bounds.min_y);
cairo_stroke(privat->cairo);
cairo_set_source_rgb(privat->cairo, 0.75, 0, 0);
cairo_move_to(privat->cairo, bounds.max_x, bounds.min_y);
cairo_line_to(privat->cairo, bounds.max_x, bounds.max_y);
cairo_line_to(privat->cairo, bounds.min_x, bounds.max_y);
cairo_line_to(privat->cairo, bounds.min_x, bounds.min_y);
//cairo_close_path(privat->cairo);
cairo_stroke(privat->cairo);
cairo_set_source_rgb(privat->cairo, 0, 0, 0);
}
cairo_set_source_rgb(privat->cairo, 0, 0, 1.0);
cairo_new_sub_path(privat->cairo);
cairo_arc(privat->cairo, sch_text_get_x(text), sch_text_get_y(text), 10, 0, 2 * M_PI);
cairo_stroke(privat->cairo);
cairo_set_source_rgb(privat->cairo, 0, 0, 0);
}
cairo_save(privat->cairo);
height = 1000 * point_size / 72;
layout = pango_cairo_create_layout(privat->cairo);
pango_cairo_context_set_resolution(pango_layout_get_context(layout), 936);
// context = pango_layout_get_context(layout);
// options = cairo_font_options_create ();
// cairo_font_options_set_hint_metrics (options, CAIRO_HINT_METRICS_OFF);
// cairo_font_options_set_hint_style (options, CAIRO_HINT_STYLE_MEDIUM);
// pango_cairo_context_set_font_options (context, options);
// cairo_font_options_destroy (options);
cairo_set_source_rgb(privat->cairo, color.red, color.green, color.blue);
pango_font_description_set_size(privat->desc, point_size * PANGO_SCALE );
pango_layout_set_spacing(layout, 40000);
pango_layout_set_font_description(layout, privat->desc);
sch_text_get_show(text, &show);
pango_layout_set_markup(layout, sch_multiline_peek_markup(multiline, show), -1);
PangoFontMetrics *metrics = pango_context_get_metrics(
pango_layout_get_context(layout),
privat->desc,
NULL
);
cairo_move_to(privat->cairo, sch_text_get_x(text), sch_text_get_y(text));
cairo_rotate(privat->cairo, M_PI * sch_text_get_angle(text) / 180);
cairo_scale(privat->cairo, 1, -1);
baseline = pango_layout_get_baseline(layout);
alignment = sch_text_get_alignment(text);
#if 1
switch (alignment)
{
case 2:
case 5:
case 8:
/* upper */
//cairo_rel_move_to(privat->cairo, 0, -pango_font_metrics_get_ascent(metrics)/(privat->zoom * PANGO_SCALE));
//cairo_rel_move_to(privat->cairo, 0, height);
break;
case 1:
case 4:
case 7:
/* center */
cairo_rel_move_to(privat->cairo, 0, -pango_font_metrics_get_ascent(metrics)/(privat->zoom * PANGO_SCALE));
cairo_rel_move_to(privat->cairo, 0, height);
cairo_rel_move_to(privat->cairo, 0, -pango_font_metrics_get_ascent(metrics) * sch_multiline_lines(multiline)/(2 * privat->zoom * PANGO_SCALE));
cairo_rel_move_to(privat->cairo, 0, -pango_font_metrics_get_descent(metrics) * (sch_multiline_lines(multiline) - 1)/(2 * privat->zoom * PANGO_SCALE));
break;
case 0:
case 3:
case 6:
default:
/* lower */
//cairo_rel_move_to(privat->cairo, 0, -pango_font_metrics_get_ascent(metrics) * sch_multiline_lines(multiline)/(privat->zoom * PANGO_SCALE));
//cairo_rel_move_to(privat->cairo, 0, -pango_font_metrics_get_descent(metrics) * (sch_multiline_lines(multiline)-1)/(privat->zoom * PANGO_SCALE));
//cairo_rel_move_to(privat->cairo, 0, -pango_layout_get_spacing(layout) * (sch_multiline_lines(multiline)-1)/ PANGO_SCALE);
iter = pango_layout_get_iter(layout);
while (!pango_layout_iter_at_last_line(iter))
{
pango_layout_iter_next_line(iter);
}
cairo_rel_move_to(privat->cairo, 0, -pango_layout_iter_get_baseline(iter) / PANGO_SCALE);
pango_layout_iter_free(iter);
}
#endif
//g_debug("Ascent: %d", pango_font_metrics_get_ascent(metrics));
//g_debug("Descent: %d", pango_font_metrics_get_descent(metrics));
//g_debug("Spacing: %d", pango_layout_get_spacing(layout));
//g_debug("Font size: %d", pango_font_description_get_size(privat->desc));
//g_debug("Baseline %d", pango_layout_get_baseline(layout));
pango_font_metrics_unref(metrics);
pango_cairo_show_layout(privat->cairo, layout);
cairo_restore(privat->cairo);
g_object_unref(layout);
}
}
}
}
}
static void
schgui_cairo_text_draw(SchGUICairoDrawItem *item, cairo_t *cairo)
{
if (cairo != NULL)
{
SchGUICairoTextPrivate *privat = SCHGUI_CAIRO_TEXT_GET_PRIVATE(item);
if (privat != NULL)
{
PangoLayout *layout = pango_cairo_create_layout(cairo);
if (layout != NULL)
{
PangoLayoutIter *iter;
int width;
cairo_save(cairo);
cairo_set_source_rgba(cairo, privat->red, privat->green, privat->blue, privat->alpha);
pango_cairo_context_set_resolution(pango_layout_get_context(layout), 936);
pango_layout_set_spacing(layout, 40000);
pango_layout_set_font_description(layout, privat->font_desc);
pango_layout_set_markup(layout, privat->markup, -1);
cairo_move_to(cairo, privat->x, privat->y);
cairo_rotate(cairo, privat->angle);
cairo_scale(cairo, 1, -1);
switch (privat->alignment)
{
case 2:
case 5:
case 8:
/* upper */
break;
case 1:
case 4:
case 7:
/* center */
iter = pango_layout_get_iter(layout);
while (!pango_layout_iter_at_last_line(iter))
{
pango_layout_iter_next_line(iter);
}
cairo_rel_move_to(cairo, 0, -pango_layout_iter_get_baseline(iter) / PANGO_SCALE / 2);
pango_layout_iter_free(iter);
break;
case 0:
case 3:
case 6:
default:
/* lower */
iter = pango_layout_get_iter(layout);
while (!pango_layout_iter_at_last_line(iter))
{
pango_layout_iter_next_line(iter);
}
cairo_rel_move_to(cairo, 0, -pango_layout_iter_get_baseline(iter) / PANGO_SCALE);
pango_layout_iter_free(iter);
}
switch (privat->alignment)
{
case 3:
case 4:
case 5:
/* center */
pango_layout_get_size(layout, &width, NULL);
cairo_rel_move_to(cairo, -width / PANGO_SCALE / 2, 0);
break;
case 6:
case 7:
case 8:
pango_layout_get_size(layout, &width, NULL);
cairo_rel_move_to(cairo, -width / PANGO_SCALE, 0);
/* right */
break;
case 0:
case 1:
case 2:
default:
/* left */
;
}
pango_cairo_show_layout(cairo, layout);
cairo_restore(cairo);
g_object_unref(layout);
}
}
}
}
static PyObject *
pango_GetLayoutClusterPos(PyObject *self, PyObject *args) {
int i, len, w, h, index, prev_index;
int ltr_flag, rtl_flag;
double baseline, x, y, width, height, char_width, dx, dy;
void *LayoutObj;
PangoLayout *layout;
PangoLayoutIter *iter;
PangoLayoutIter *cluster_iter;
PangoRectangle rect, cluster_rect;
PangoDirection dir;
PyObject *ret;
PyObject *layout_data;
PyObject *cluster_data;
PyObject *cluster_range;
PyObject *cluster_index_data;
PyObject *cluster_index_range;
PyObject *glyph_data;
if (!PyArg_ParseTuple(args, "Oi", &LayoutObj, &len)) {
return NULL;
}
layout = PyCObject_AsVoidPtr(LayoutObj);
pango_layout_get_size(layout, &w, &h);
dx = 0.0;
if (pango_layout_get_alignment(layout) == PANGO_ALIGN_CENTER) {
dx = -0.5 * ((double) w) / PANGO_SCALE;
} else if (pango_layout_get_alignment(layout) == PANGO_ALIGN_RIGHT) {
dx = -1.0 * ((double) w) / PANGO_SCALE;
}
ret = PyTuple_New(5);
layout_data = PyList_New(0);
cluster_data = PyList_New(0);
cluster_index_data = PyList_New(0);
PyTuple_SetItem(ret, 0, layout_data);
PyTuple_SetItem(ret, 1, cluster_data);
PyTuple_SetItem(ret, 2, cluster_index_data);
iter = pango_layout_get_iter(layout);
cluster_iter = pango_layout_get_iter(layout);
prev_index = -1;
rtl_flag = 0;
ltr_flag = 0;
dy = ((double) pango_layout_iter_get_baseline(iter)) / PANGO_SCALE;
for (i = 0; i < len; i++) {
glyph_data = PyTuple_New(6);
//Processing EOL
while (pango_layout_iter_get_baseline(cluster_iter) !=
pango_layout_iter_get_baseline(iter)) {
pango_layout_iter_get_char_extents(iter, &rect);
x = ((double) rect.x) / PANGO_SCALE + dx;
PyTuple_SetItem(glyph_data, 0, PyFloat_FromDouble(x));
y = -1.0 * ((double) rect.y) / PANGO_SCALE + dy;
PyTuple_SetItem(glyph_data, 1, PyFloat_FromDouble(y));
width = ((double) rect.width) / PANGO_SCALE;
PyTuple_SetItem(glyph_data, 2, PyFloat_FromDouble(width));
height = ((double) rect.height) / PANGO_SCALE;
PyTuple_SetItem(glyph_data, 3, PyFloat_FromDouble(height));
baseline = -1.0 * ((double) pango_layout_iter_get_baseline(iter))
/ PANGO_SCALE + dy;
PyTuple_SetItem(glyph_data, 4, PyFloat_FromDouble(baseline));
//index processing
index=pango_layout_iter_get_index(iter);
prev_index = index;
PyTuple_SetItem(glyph_data, 5, PyInt_FromLong(index));
PyList_Append(layout_data, glyph_data);
pango_layout_iter_next_char(iter);
i++;
glyph_data = PyTuple_New(6);
}
pango_layout_iter_get_char_extents(iter, &rect);
pango_layout_iter_get_cluster_extents(cluster_iter, NULL, &cluster_rect);
//Processing cluster data
//Layout_data: (x,y,width,height,base_line,byte_index)
x = ((double) cluster_rect.x) / PANGO_SCALE + dx;
PyTuple_SetItem(glyph_data, 0, PyFloat_FromDouble(x));
y = -1.0 * ((double) cluster_rect.y) / PANGO_SCALE + dy;
PyTuple_SetItem(glyph_data, 1, PyFloat_FromDouble(y));
width = ((double) cluster_rect.width) / PANGO_SCALE;
PyTuple_SetItem(glyph_data, 2, PyFloat_FromDouble(width));
height = ((double) cluster_rect.height) / PANGO_SCALE;
PyTuple_SetItem(glyph_data, 3, PyFloat_FromDouble(height));
baseline = -1.0 * ((double) pango_layout_iter_get_baseline(cluster_iter))
/ PANGO_SCALE + dy;
PyTuple_SetItem(glyph_data, 4, PyFloat_FromDouble(baseline));
//index processing
index=pango_layout_iter_get_index(iter);
if (prev_index != -1){
if(index < prev_index){
rtl_flag=1;
}else if(index > prev_index){
ltr_flag=1;
}
}
prev_index = index;
PyTuple_SetItem(glyph_data, 5, PyInt_FromLong(index));
PyList_Append(layout_data, glyph_data);
//Iterating over chars to next cluster
if(cluster_rect.width > rect.width){
char_width = rect.width;
cluster_range = PyTuple_New(2);
cluster_index_range = PyTuple_New(2);
PyTuple_SetItem(cluster_range, 0, PyInt_FromLong(i));
PyTuple_SetItem(cluster_index_range, 0,
PyInt_FromLong(pango_layout_iter_get_index(iter)));
while(cluster_rect.width > char_width){
pango_layout_iter_next_char(iter);
pango_layout_iter_get_char_extents(iter, &rect);
char_width = char_width + rect.width;
i++;
}
PyTuple_SetItem(cluster_range, 1, PyInt_FromLong(i + 1));
PyTuple_SetItem(cluster_index_range, 1,
PyInt_FromLong(pango_layout_iter_get_index(iter)));
PyList_Append(cluster_data, cluster_range);
PyList_Append(cluster_index_data, cluster_index_range);
}
pango_layout_iter_next_char(iter);
pango_layout_iter_next_cluster(cluster_iter);
}
pango_layout_iter_free(iter);
pango_layout_iter_free(cluster_iter);
if(rtl_flag + ltr_flag == 2){
PyTuple_SetItem(ret, 3, PyBool_FromLong(1));
}else{
PyTuple_SetItem(ret, 3, PyBool_FromLong(0));
}
dir = pango_find_base_dir(pango_layout_get_text(layout),-1);
if(dir == PANGO_DIRECTION_RTL) {
PyTuple_SetItem(ret, 4, PyBool_FromLong(1));
} else {
PyTuple_SetItem(ret, 4, PyBool_FromLong(0));
}
return ret;
}
gboolean
text_get_extents (const gchar *fontname,
const gchar *text,
gint *width,
gint *height,
gint *ascent,
gint *descent)
{
PangoFontDescription *font_desc;
PangoContext *context;
PangoLayout *layout;
PangoFontMap *fontmap;
PangoRectangle rect;
g_return_val_if_fail (fontname != NULL, FALSE);
g_return_val_if_fail (text != NULL, FALSE);
fontmap = pango_cairo_font_map_new_for_font_type (CAIRO_FONT_TYPE_FT);
if (! fontmap)
g_error ("You are using a Pango that has been built against a cairo "
"that lacks the Freetype font backend");
pango_cairo_font_map_set_resolution (PANGO_CAIRO_FONT_MAP (fontmap),
72.0); /* FIXME: resolution */
context = pango_font_map_create_context (fontmap);
g_object_unref (fontmap);
layout = pango_layout_new (context);
g_object_unref (context);
font_desc = pango_font_description_from_string (fontname);
pango_layout_set_font_description (layout, font_desc);
pango_font_description_free (font_desc);
pango_layout_set_text (layout, text, -1);
pango_layout_get_pixel_extents (layout, NULL, &rect);
if (width)
*width = rect.width;
if (height)
*height = rect.height;
if (ascent || descent)
{
PangoLayoutIter *iter;
PangoLayoutLine *line;
iter = pango_layout_get_iter (layout);
line = pango_layout_iter_get_line_readonly (iter);
pango_layout_iter_free (iter);
pango_layout_line_get_pixel_extents (line, NULL, &rect);
if (ascent)
*ascent = PANGO_ASCENT (rect);
if (descent)
*descent = - PANGO_DESCENT (rect);
}
g_object_unref (layout);
return TRUE;
}
