TextAsset::Size
TextAsset::computeSizeOfText(cairo_t* cairoContext,
const std::string textString,
int bounds,
PangoFontDescription* font,
Rect* tight,
float* lineHeightOut)
{
PangoLayout* layout = pango_cairo_create_layout(cairoContext);
// Kerning
PangoAttrList* attr_list = pango_attr_list_new();
PangoAttribute* spacing_attr = pango_attr_letter_spacing_new(pango_units_from_double(_kern));
pango_attr_list_insert(attr_list, spacing_attr);
pango_layout_set_attributes(layout, attr_list);
pango_cairo_context_set_resolution(pango_layout_get_context(layout), DISPLAY_RESOLUTION);
pango_layout_set_text(layout, textString.c_str(), (int)textString.length());
pango_layout_set_alignment(layout, _alignment);
pango_layout_set_wrap(layout, PANGO_WRAP_WORD_CHAR);
const Size maxTextureSize(bounds, 1024);
pango_layout_set_width(layout, pango_units_from_double(maxTextureSize.width));
pango_layout_set_height(layout, pango_units_from_double(maxTextureSize.height));
pango_layout_set_font_description(layout, font);
applyLeading(cairoContext, layout, font);
PangoRectangle estimateSize;
PangoRectangle ink;
pango_layout_get_pixel_extents(layout, &ink, &estimateSize);
// If the text is right or center aligned the offsets will contain all the
// leading space. We ignore that for the size because drawText will draw
// in the larger box. The tight box below will get the offsets so we know
// where to draw so the text lands in the same tight box.
Size res(estimateSize.width, estimateSize.height);
if (tight != NULL) {
float lineHeight;
float xHeight = charHeight(cairoContext, font, 'x', &lineHeight);
if (lineHeightOut != NULL) {
*lineHeightOut = lineHeight;
}
const float capHeight = charHeight(cairoContext, font, 'Y');
const float ascender = pango_units_to_double(pango_layout_get_baseline(layout));
const float topSpace = ascender - capHeight;
const float bottomSpace = MAX(lineHeight - ascender - (capHeight - xHeight), 0);
if (res.height > topSpace + bottomSpace) {
*tight = Rect(estimateSize.x,
estimateSize.y + topSpace,
res.width,
res.height - topSpace - bottomSpace);
} else {
*tight = Rect(0, 0, res.width, res.height);
}
}
g_object_unref(layout);
return res;
}
void get_text_size(cairo_t *cairo, const char *font, int *width, int *height,
int *baseline, double scale, bool markup, const char *fmt, ...) {
va_list args;
va_start(args, fmt);
// Add one since vsnprintf excludes null terminator.
int length = vsnprintf(NULL, 0, fmt, args) + 1;
va_end(args);
char *buf = malloc(length);
if (buf == NULL) {
sway_log(SWAY_ERROR, "Failed to allocate memory");
return;
}
va_start(args, fmt);
vsnprintf(buf, length, fmt, args);
va_end(args);
PangoLayout *layout = get_pango_layout(cairo, font, buf, scale, markup);
pango_cairo_update_layout(cairo, layout);
pango_layout_get_pixel_size(layout, width, height);
if (baseline) {
*baseline = pango_layout_get_baseline(layout) / PANGO_SCALE;
}
g_object_unref(layout);
free(buf);
}
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;
}
static int
get_pango_vertical_offset (PangoLayout *layout)
{
const PangoFontDescription *desc;
PangoContext *context;
PangoLanguage *language;
PangoFontMetrics *metrics;
int baseline;
int strikethrough;
int thickness;
context = pango_layout_get_context (layout);
language = pango_language_get_default ();
desc = pango_layout_get_font_description (layout);
metrics = pango_context_get_metrics (context, desc, language);
baseline = pango_layout_get_baseline (layout);
strikethrough = pango_font_metrics_get_strikethrough_position (metrics);
thickness = pango_font_metrics_get_underline_thickness (metrics);
return PANGO_PIXELS (baseline - strikethrough - thickness / 2);
}
void render_glyph(
cairo_t* cr,
PangoFontDescription* font_desc,
PangoFont* font,
const guint code_point,
const size_t cell_x,
const size_t cell_y,
const size_t cell_size,
const double tex_size,
const int ascent,
const int descent,
std::ostream& bgm_out
)
{
PangoLayout *layout = pango_cairo_create_layout(cr);
char str[6] = {'\0'};
size_t len = 0;
oglplus::aux::ConvertCodePointToUTF8(code_point, str, len);
pango_layout_set_font_description(layout, font_desc);
pango_layout_set_text(layout, str, len);
const int baseline = pango_layout_get_baseline(layout);
const double inv_ps = 1.0 / double(PANGO_SCALE);
const double font_size = ascent+descent;
PangoRectangle ink_rect, log_rect;
pango_layout_get_extents(
layout,
&ink_rect,
&log_rect
);
// code point number
bgm_out << code_point << std::endl;
// hex representation of the number
bgm_out << std::hex
<< "0x"
<< code_point
<< std::dec
<< std::endl;
// the utf-8 sequence
bgm_out << "'" << str << "'" << std::endl;
//
// vertex[0] logical rectangle metrics
//
// Left bearing (x)
bgm_out << PANGO_LBEARING(log_rect)/font_size << std::endl;
// Right bearing (x+width)
bgm_out << PANGO_RBEARING(log_rect)/font_size << std::endl;
// Ascent
bgm_out << (baseline-log_rect.y)/font_size << std::endl;
// Descent
bgm_out << (log_rect.height+log_rect.y-baseline)/font_size << std::endl;
//
// vertex[1] ink rectangle metrics
//
// Left bearing (x)
bgm_out << PANGO_LBEARING(ink_rect)/font_size << std::endl;
// Right bearing (x+width)
bgm_out << PANGO_RBEARING(ink_rect)/font_size << std::endl;
// Ascent
bgm_out << (baseline-ink_rect.y)/font_size << std::endl;
// Descent
bgm_out << (ink_rect.y+ink_rect.height-baseline)/font_size << std::endl;
//
// vertex[2] texture coordinates
//
// Origin X
bgm_out << (cell_x*cell_size+ink_rect.x*inv_ps)/tex_size << std::endl;
// Origin Y
bgm_out << 1.0-(cell_y*cell_size+baseline*inv_ps)/tex_size << std::endl;
// Width
bgm_out << ((ink_rect.width)*inv_ps)/tex_size << std::endl;
// Height
bgm_out << ((ink_rect.height)*inv_ps)/tex_size << std::endl;
// separating newline
bgm_out << std::endl;
cairo_new_path(cr);
cairo_move_to(cr, cell_x*cell_size, cell_y*cell_size);
cairo_set_line_width(cr, 0.5);
pango_cairo_update_layout(cr, layout);
pango_cairo_layout_path(cr, layout);
cairo_fill(cr);
g_object_unref(layout);
}
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);
}
}
}
}
}
void Set(const char* c_str, const std::size_t size)
{
// create a cairo renderer
PangoCairoHandle< ::cairo_t*> cairo(
::cairo_create(_surface),
::cairo_destroy
);
// clear the surface
::cairo_save(cairo);
::cairo_set_source_rgba(cairo, 0, 0, 0, 0);
::cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
::cairo_paint(cairo);
::cairo_restore(cairo);
// if the new text string is empty, quit
if(size == 0) return;
// create a layout
PangoCairoHandle< ::PangoLayout*, ::gpointer> layout(
::pango_cairo_create_layout(cairo),
::g_object_unref
);
// set the text
::pango_layout_set_text(layout, c_str, size);
::pango_layout_set_font_description(
layout,
_font._essence->_font_desc
);
// check the required layout dimensions
int req_width = 0;
int req_height = 0;
{
::PangoRectangle ink_rect, log_rect;
::pango_layout_get_extents(
layout,
&ink_rect,
&log_rect
);
req_width = log_rect.width/PANGO_SCALE;
req_height = log_rect.height/PANGO_SCALE;
_curr_width = req_width;
}
// resize if necessary
if((_width < req_width) || (_height < req_height))
{
_width = req_width;
_height = req_height;
_surface.replace(
::cairo_image_surface_create(
CAIRO_FORMAT_A8,
_width,
_height
)
);
cairo.replace(::cairo_create(_surface));
layout.replace(::pango_cairo_create_layout(cairo));
PangoCairoDeallocateLayoutData(_parent, _data);
PangoCairoAllocateLayoutData(
_parent,
_data,
_width,
_height
);
}
int baseline = pango_layout_get_baseline(layout)/PANGO_SCALE;
_log_coords = Vec4f(
0.0f, // left bearing
GLfloat(_curr_width)/GLfloat(_height), // right bearing
GLfloat(baseline)/GLfloat(_height), // ascent
GLfloat(_height-baseline)/GLfloat(_height) // descent
);
_tex_coords = Vec4f(
0.0f, // origin x
0.0f, // origin y
_curr_width, // width
_height // height
);
// render the text
::cairo_new_path(cairo);
::cairo_move_to(cairo, 0, 0);
::cairo_set_line_width(cairo, 0.5);
::pango_cairo_update_layout(cairo, layout);
::pango_cairo_layout_path(cairo, layout);
::cairo_fill(cairo);
::cairo_surface_flush(_surface);
// update the data
PangoCairoInitializeLayoutData(
_parent,
_data,
::cairo_image_surface_get_width(_surface),
::cairo_image_surface_get_height(_surface),
::cairo_image_surface_get_data(_surface)
);
}
static boolean pango_textlayout(textspan_t * span, char **fontpath)
{
static char buf[1024]; /* returned in fontpath, only good until next call */
static PangoFontMap *fontmap;
static PangoContext *context;
static PangoFontDescription *desc;
static char *fontname;
static double fontsize;
static gv_font_map* gv_fmap;
char *fnt, *psfnt = NULL;
PangoLayout *layout;
PangoRectangle logical_rect;
cairo_font_options_t* options;
PangoFont *font;
#ifdef ENABLE_PANGO_MARKUP
PangoAttrList *attrs;
GError *error = NULL;
int flags;
#endif
char *text;
double textlayout_scale;
PostscriptAlias *pA;
if (!context) {
fontmap = pango_cairo_font_map_new();
gv_fmap = get_font_mapping(fontmap);
#ifdef HAVE_PANGO_FONT_MAP_CREATE_CONTEXT
context = pango_font_map_create_context (fontmap);
#else
context = pango_cairo_font_map_create_context (PANGO_CAIRO_FONT_MAP(fontmap));
#endif
options=cairo_font_options_create();
cairo_font_options_set_antialias(options,CAIRO_ANTIALIAS_GRAY);
cairo_font_options_set_hint_style(options,CAIRO_HINT_STYLE_FULL);
cairo_font_options_set_hint_metrics(options,CAIRO_HINT_METRICS_ON);
cairo_font_options_set_subpixel_order(options,CAIRO_SUBPIXEL_ORDER_BGR);
pango_cairo_context_set_font_options(context, options);
pango_cairo_context_set_resolution(context, FONT_DPI);
cairo_font_options_destroy(options);
g_object_unref(fontmap);
}
if (!fontname || strcmp(fontname, span->font->name) != 0 || fontsize != span->font->size) {
fontname = span->font->name;
fontsize = span->font->size;
pango_font_description_free (desc);
pA = span->font->postscript_alias;
if (pA) {
psfnt = fnt = gv_fmap[pA->xfig_code].gv_font;
if(!psfnt)
psfnt = fnt = pango_psfontResolve (pA);
}
else
fnt = fontname;
desc = pango_font_description_from_string(fnt);
/* all text layout is done at a scale of FONT_DPI (nominaly 96.) */
pango_font_description_set_size (desc, (gint)(fontsize * PANGO_SCALE));
if (fontpath && (font = pango_font_map_load_font(fontmap, context, desc))) { /* -v support */
const char *fontclass;
fontclass = G_OBJECT_CLASS_NAME(G_OBJECT_GET_CLASS(font));
buf[0] = '\0';
if (psfnt) {
strcat(buf, "(ps:pango ");
strcat(buf, psfnt);
strcat(buf, ") ");
}
strcat(buf, "(");
strcat(buf, fontclass);
strcat(buf, ") ");
#ifdef HAVE_PANGO_FC_FONT_LOCK_FACE
if (strcmp(fontclass, "PangoCairoFcFont") == 0) {
FT_Face face;
PangoFcFont *fcfont;
FT_Stream stream;
FT_StreamDesc streamdesc;
fcfont = PANGO_FC_FONT(font);
face = pango_fc_font_lock_face(fcfont);
if (face) {
strcat(buf, "\"");
strcat(buf, face->family_name);
strcat(buf, ", ");
strcat(buf, face->style_name);
strcat(buf, "\" ");
stream = face->stream;
if (stream) {
streamdesc = stream->pathname;
if (streamdesc.pointer)
strcat(buf, (char*)streamdesc.pointer);
else
strcat(buf, "*no pathname available*");
}
else
strcat(buf, "*no stream available*");
}
pango_fc_font_unlock_face(fcfont);
}
else
#endif
{
PangoFontDescription *tdesc;
char *tfont;
tdesc = pango_font_describe(font);
tfont = pango_font_description_to_string(tdesc);
strcat(buf, "\"");
strcat(buf, tfont);
strcat(buf, "\" ");
g_free(tfont);
}
*fontpath = buf;
}
}
#ifdef ENABLE_PANGO_MARKUP
if ((span->font) && (flags = span->font->flags)) {
unsigned char buf[BUFSIZ];
agxbuf xb;
agxbinit(&xb, BUFSIZ, buf);
agxbput(&xb,"<span");
if (flags & HTML_BF)
agxbput(&xb," weight=\"bold\"");
if (flags & HTML_IF)
agxbput(&xb," style=\"italic\"");
if (flags & HTML_UL)
agxbput(&xb," underline=\"single\"");
if (flags & HTML_S)
agxbput(&xb," strikethrough=\"true\"");
agxbput (&xb,">");
if (flags & HTML_SUP)
agxbput(&xb,"<sup>");
if (flags & HTML_SUB)
agxbput(&xb,"<sub>");
agxbput (&xb,xml_string0(span->str, TRUE));
if (flags & HTML_SUB)
agxbput(&xb,"</sub>");
if (flags & HTML_SUP)
agxbput(&xb,"</sup>");
agxbput (&xb,"</span>");
if (!pango_parse_markup (agxbuse(&xb), -1, 0, &attrs, &text, NULL, &error)) {
fprintf (stderr, "Error - pango_parse_markup: %s\n", error->message);
text = span->str;
attrs = NULL;
}
agxbfree (&xb);
}
else {
text = span->str;
attrs = NULL;
}
#else
text = span->str;
#endif
layout = pango_layout_new (context);
span->layout = (void *)layout; /* layout free with textspan - see labels.c */
span->free_layout = pango_free_layout; /* function for freeing pango layout */
pango_layout_set_text (layout, text, -1);
pango_layout_set_font_description (layout, desc);
#ifdef ENABLE_PANGO_MARKUP
if (attrs)
pango_layout_set_attributes (layout, attrs);
#endif
pango_layout_get_extents (layout, NULL, &logical_rect);
/* if pango doesn't like the font then it sets width=0 but height = garbage */
if (logical_rect.width == 0)
logical_rect.height = 0;
textlayout_scale = POINTS_PER_INCH / (FONT_DPI * PANGO_SCALE);
span->size.x = (int)(logical_rect.width * textlayout_scale + 1); /* round up so that width/height are never too small */
span->size.y = (int)(logical_rect.height * textlayout_scale + 1);
/* FIXME -- Horrible kluge !!! */
/* For now we are using pango for single line blocks only.
* The logical_rect.height seems to be too high from the font metrics on some platforms.
* Use an assumed height based on the point size.
*/
span->size.y = (int)(span->font->size * 1.1 + .5);
/* The y offset from baseline to 0,0 of the bitmap representation */
#if !defined(WIN32) && defined PANGO_VERSION_MAJOR && (PANGO_VERSION_MAJOR >= 1)
span->yoffset_layout = pango_layout_get_baseline (layout) * textlayout_scale;
#else
{
/* do it the hard way on rhel5/centos5 */
PangoLayoutIter *iter = pango_layout_get_iter (layout);
span->yoffset_layout = pango_layout_iter_get_baseline (iter) * textlayout_scale;
}
#endif
/* The distance below midline for y centering of text strings */
span->yoffset_centerline = 0.2 * span->font->size;
if (logical_rect.width == 0)
return FALSE;
return TRUE;
}
void text_rsrc::updatePixels()
{
scoped_lock< mutex > slock( text_mutex );
text_update_context context;
// Set up Cairo then Pango with initial values /////////////////////////////////////////////////////////////////////////////////////////////////////////
if( max_dimensions[ 0 ] < 0 )
dimensions[ 0 ] = PANGOCAIRO_INITIAL_PX_WIDTH;
else
dimensions[ 0 ] = max_dimensions[ 0 ];
if( max_dimensions[ 1 ] < 0 )
dimensions[ 1 ] = PANGOCAIRO_INITIAL_PX_HEIGHT;
else
dimensions[ 1 ] = max_dimensions[ 1 ];
updatePixels_setup( &context );
// Redo everything if we need to resize ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
if( max_dimensions[ 0 ] < 0
|| max_dimensions[ 1 ] < 0 )
{
// Get Pango pixel dimensions //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
PangoRectangle p_layout_inkrect;
pango_layout_get_extents( context.p_layout,
&p_layout_inkrect,
NULL );
// Make sure we have enough room
dimensions[ 0 ] = ceil( ( double )( p_layout_inkrect.width + p_layout_inkrect.x ) / PANGO_SCALE );
dimensions[ 1 ] = ceil( ( double )( p_layout_inkrect.height + p_layout_inkrect.y ) / PANGO_SCALE );
// Clean up Pango then Cairo ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
updatePixels_cleanup( &context );
// Re-set up Cairo then Pango with actual values ///////////////////////////////////////////////////////////////////////////////////////////////////
updatePixels_setup( &context );
}
// Draw text to surface ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
pango_cairo_show_layout( context.c_context,
context.p_layout ); // Render text
tex_offset[ 0 ] = 0;
tex_offset[ 1 ] = pango_layout_get_baseline( context.p_layout ) / PANGO_SCALE * -1;
// Convert Cairo surface to RGBA for OpenGL ////////////////////////////////////////////////////////////////////////////////////////////////////////////
if( pixel_space != NULL )
delete[] pixel_space;
pixel_space = new unsigned char[ dimensions[ 0 ] * dimensions [ 1 ] * 4 ];
if( pixel_space == NULL )
throw exception( "text_rsrc::updatePixels(): Could not allocate pixel space" );
unsigned char* c_data = cairo_image_surface_get_data( context.c_surf );
int c_stride = cairo_image_surface_get_stride( context.c_surf );
unsigned char* c_pixelp;
for( long i = 0; i < dimensions[ 0 ] * dimensions[ 1 ]; ++i )
{
if( i % dimensions[ 0 ] == 0 )
c_pixelp = c_data + c_stride * ( i / dimensions[ 0 ] ); // Important since the surface stride might be wider than the surface width
pixel_space[ i * 4 + 0 ] = 0xFF;
pixel_space[ i * 4 + 1 ] = 0xFF;
pixel_space[ i * 4 + 2 ] = 0xFF;
pixel_space[ i * 4 + 3 ] = c_pixelp[ i % dimensions[ 0 ] ];
}
// Clean up Pango then Cairo ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
updatePixels_cleanup( &context );
}
static void texbox_update ( textbox *tb )
{
if ( tb->update ) {
unsigned int offset = ( tb->flags & TB_INDICATOR ) ? DOT_OFFSET : 0;
if ( tb->main_surface ) {
cairo_destroy ( tb->main_draw );
cairo_surface_destroy ( tb->main_surface );
tb->main_draw = NULL;
tb->main_surface = NULL;
}
tb->main_surface = cairo_image_surface_create ( CAIRO_FORMAT_ARGB32, tb->widget.w, tb->widget.h );
tb->main_draw = cairo_create ( tb->main_surface );
cairo_set_operator ( tb->main_draw, CAIRO_OPERATOR_OVER );
pango_cairo_update_layout ( tb->main_draw, tb->layout );
int font_height = textbox_get_font_height ( tb );
int cursor_x = 0;
int cursor_y = 0;
int cursor_width = 2; //MAX ( 2, font_height / 10 );
int cursor_height = font_height;
if ( tb->changed ) {
__textbox_update_pango_text ( tb );
}
if ( tb->flags & TB_EDITABLE ) {
// We want to place the cursor based on the text shown.
const char *text = pango_layout_get_text ( tb->layout );
// Clamp the position, should not be needed, but we are paranoid.
int cursor_offset = MIN ( tb->cursor, g_utf8_strlen ( text, -1 ) );
PangoRectangle pos;
// convert to byte location.
char *offset = g_utf8_offset_to_pointer ( text, cursor_offset );
pango_layout_get_cursor_pos ( tb->layout, offset - text, &pos, NULL );
cursor_x = pos.x / PANGO_SCALE;
cursor_y = pos.y / PANGO_SCALE;
cursor_height = pos.height / PANGO_SCALE;
}
// Skip the side MARGIN on the X axis.
int x = widget_padding_get_left ( WIDGET ( tb ) ) + offset;
int y = 0;
if ( tb->flags & TB_RIGHT ) {
int line_width = 0;
// Get actual width.
pango_layout_get_pixel_size ( tb->layout, &line_width, NULL );
x = ( tb->widget.w - line_width - widget_padding_get_right ( WIDGET ( tb ) ) - offset );
}
else if ( tb->flags & TB_CENTER ) {
int tw = textbox_get_font_width ( tb );
x = ( ( tb->widget.w - tw - widget_padding_get_padding_width ( WIDGET ( tb ) ) - offset ) ) / 2;
}
y = widget_padding_get_top ( WIDGET ( tb ) ) + ( pango_font_metrics_get_ascent ( p_metrics ) - pango_layout_get_baseline ( tb->layout ) ) / PANGO_SCALE;
rofi_theme_get_color ( WIDGET ( tb ), "foreground", tb->main_draw );
// Text
rofi_theme_get_color ( WIDGET ( tb ), "text", tb->main_draw );
// draw the cursor
if ( tb->flags & TB_EDITABLE && tb->blink ) {
cairo_rectangle ( tb->main_draw, x + cursor_x, y + cursor_y, cursor_width, cursor_height );
cairo_fill ( tb->main_draw );
}
// Set ARGB
// We need to set over, otherwise subpixel hinting wont work.
//cairo_set_operator ( tb->main_draw, CAIRO_OPERATOR_OVER );
cairo_move_to ( tb->main_draw, x, y );
pango_cairo_show_layout ( tb->main_draw, tb->layout );
if ( ( tb->flags & TB_INDICATOR ) == TB_INDICATOR && ( tb->tbft & ( SELECTED ) ) ) {
cairo_arc ( tb->main_draw, DOT_OFFSET / 2.0, tb->widget.h / 2.0, 2.0, 0, 2.0 * M_PI );
cairo_fill ( tb->main_draw );
}
tb->update = FALSE;
}
}
void wxSVGCanvasTextCairo::InitText(const wxString& text, const wxCSSStyleDeclaration& style, wxSVGMatrix* matrix) {
BeginChar(matrix);
// create path from text
cairo_t* cr = ((wxSVGCanvasPathCairo*) m_char->path)->GetCr();
#if defined(__WXMSW__) || defined(__WXMAC__)
int size = (int) style.GetFontSize();
int fstyle = style.GetFontStyle() == wxCSS_VALUE_ITALIC ? wxFONTSTYLE_ITALIC
: (style.GetFontStyle() == wxCSS_VALUE_OBLIQUE ? wxFONTSTYLE_SLANT : wxFONTSTYLE_NORMAL);
wxFontWeight weight = style.GetFontWeight() == wxCSS_VALUE_BOLD ? wxFONTWEIGHT_BOLD
: style.GetFontWeight() == wxCSS_VALUE_BOLDER ? wxFONTWEIGHT_MAX
: style.GetFontWeight() == wxCSS_VALUE_LIGHTER ? wxFONTWEIGHT_LIGHT : wxFONTWEIGHT_NORMAL;
wxFont fnt(size, wxFONTFAMILY_DEFAULT, fstyle, weight, false, style.GetFontFamily());
#ifdef __WXMSW__
HFONT hfont = (HFONT) fnt.GetResourceHandle();
cairo_set_font_face(cr, cairo_win32_font_face_create_for_hfont(hfont));
#else
CGFontRef cgFont = fnt.OSXGetCGFont();
cairo_set_font_face(cr, cairo_quartz_font_face_create_for_cgfont(cgFont));
#endif
cairo_set_font_size(cr, style.GetFontSize());
cairo_font_extents_t fextents;
cairo_font_extents(cr, &fextents);
double maxWidth = 0;
if (style.GetTextAnchor() == wxCSS_VALUE_MIDDLE || style.GetTextAnchor() == wxCSS_VALUE_END) {
wxStringTokenizer tokenzr(text, wxT("\n"));
while (tokenzr.HasMoreTokens()) {
wxString token = tokenzr.GetNextToken();
cairo_text_extents_t extents;
cairo_text_extents(cr, (const char*) token.utf8_str(), &extents);
if (maxWidth < extents.width)
maxWidth = extents.width;
}
}
wxStringTokenizer tokenzr(text, wxT("\n"));
double x_advance = 0;
double width = 0;
double height = 0;
double y = 0;
while (tokenzr.HasMoreTokens()) {
wxString token = tokenzr.GetNextToken();
// get text extents
cairo_text_extents_t extents;
cairo_text_extents(cr, (const char*) token.utf8_str(), &extents);
double x = style.GetTextAnchor() == wxCSS_VALUE_END ? maxWidth - extents.width
: style.GetTextAnchor() == wxCSS_VALUE_MIDDLE ? (maxWidth - extents.width) / 2 : 0;
m_char->path->MoveTo(m_tx + x, m_ty + y);
cairo_text_path(cr, (const char*) token.utf8_str());
if (x_advance < extents.x_advance)
x_advance = extents.x_advance;
if (width < extents.width)
width = extents.width;
height += fextents.height;
if (tokenzr.HasMoreTokens())
y += fextents.height;
}
// set bbox
m_char->bbox = wxSVGRect(m_tx, m_ty, width, height);
// increase current position (m_tx)
if (style.GetTextAnchor() == wxCSS_VALUE_MIDDLE || style.GetTextAnchor() == wxCSS_VALUE_END) {
wxSVGRect bbox = m_char->path->GetResultBBox(style);
m_tx += x_advance > bbox.GetWidth() ? x_advance : bbox.GetWidth();
} else
m_tx += x_advance;
#else
PangoLayout* layout = pango_cairo_create_layout(cr);
PangoFontDescription* font = pango_font_description_new();
pango_font_description_set_family(font, style.GetFontFamily().ToAscii());
pango_font_description_set_weight(font, style.GetFontWeight() == wxCSS_VALUE_BOLD ? PANGO_WEIGHT_BOLD
: PANGO_WEIGHT_NORMAL);
pango_font_description_set_style(font, style.GetFontStyle() == wxCSS_VALUE_ITALIC ? PANGO_STYLE_ITALIC
: (style.GetFontStyle() == wxCSS_VALUE_OBLIQUE ? PANGO_STYLE_OBLIQUE : PANGO_STYLE_NORMAL));
pango_font_description_set_absolute_size(font, style.GetFontSize() * PANGO_SCALE);
PangoContext* ctx = pango_layout_get_context(layout);
PangoFont* f = pango_context_load_font(ctx, font);
if (f == NULL)
pango_font_description_set_style(font, PANGO_STYLE_NORMAL);
pango_layout_set_font_description(layout, font);
if (style.GetTextAnchor() != wxCSS_VALUE_START)
pango_layout_set_alignment(layout, style.GetTextAnchor() == wxCSS_VALUE_MIDDLE ? PANGO_ALIGN_CENTER : PANGO_ALIGN_RIGHT);
pango_layout_set_text(layout, (const char*) text.utf8_str(), -1);
int baseline = pango_layout_get_baseline(layout);
m_char->path->MoveTo(m_tx, m_ty - ((double)baseline / PANGO_SCALE));
pango_cairo_layout_path(cr, layout);
// set bbox and increase current position (m_tx)
int lwidth, lheight;
pango_layout_get_size(layout, &lwidth, &lheight);
double width = ((double)lwidth / PANGO_SCALE);
double height = ((double)lheight / PANGO_SCALE);
m_char->bbox = wxSVGRect(m_tx, m_ty, width, height);
if (style.GetTextAnchor() == wxCSS_VALUE_MIDDLE || style.GetTextAnchor() == wxCSS_VALUE_END) {
wxSVGRect bbox = m_char->path->GetResultBBox(style);
m_tx += width > bbox.GetWidth() ? width : bbox.GetWidth();
} else
m_tx += width;
g_object_unref(layout);
pango_font_description_free(font);
#endif
}
