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 }