X-Git-Url: https://git.sesse.net/?p=ccbs;a=blobdiff_plain;f=bigscreen%2Ffonts.cpp;h=b9a02c5aecf24e0f0be6111dd8e5f08b050dc888;hp=bbc4c1a0d4305e5133c7626d8ace838435080439;hb=HEAD;hpb=2b2861e26f123a07b2794d4a66b6e62868b288d1 diff --git a/bigscreen/fonts.cpp b/bigscreen/fonts.cpp index bbc4c1a..b9a02c5 100644 --- a/bigscreen/fonts.cpp +++ b/bigscreen/fonts.cpp @@ -3,6 +3,13 @@ #include #include #include +#include +#include +#include +#include +#include +#include +#include #include "fonts.h" #include "resolution.h" #include "theme.h" @@ -53,8 +60,9 @@ void init_freetype() FT_Face face; if (FT_New_Face(library, font_list[i].c_str(), 0, &face)) { fprintf(stderr, "Warning: Couldn't open '%s', some glyphs might not be available\n", font_list[i].c_str()); + } else { + faces[font_list[i]] = face; } - faces[font_list[i]] = face; } } } @@ -67,10 +75,48 @@ void set_screen_size(unsigned width, unsigned height) screen_height = height; } +void render_glyph(FT_GlyphSlot slot, int glyphx, int glyphy, unsigned char *buf, int r, int g, int b, bool use_lcd) +{ + FT_Bitmap *bm = &(slot->bitmap); + for (unsigned y = 0; y < bm->rows; y++) { + int xx; + int dsty = glyphy - slot->bitmap_top + y; + if (dsty < 0 || dsty > signed(screen_height-1)) continue; + + unsigned char *dst = buf + dsty * screen_width*4 + (glyphx + slot->bitmap_left)*4; + unsigned char *src = bm->buffer + y * bm->pitch; + if (use_lcd) { + int width = (glyphx + slot->bitmap_left + bm->width/3 >= signed(screen_width)) ? ((screen_width-1) - glyphx - slot->bitmap_left) : bm->width/3; + for (xx = 0; xx < width; xx++) { + *dst = (*dst * (256-src[2]) + b * src[2]) >> 8; + ++dst; + *dst = (*dst * (256-src[1]) + g * src[1]) >> 8; + ++dst; + *dst = (*dst * (256-src[0]) + r * src[0]) >> 8; + ++dst; + *dst++ = 0; + + src += 3; + } + } else { + int width = (glyphx + slot->bitmap_left + bm->width >= signed(screen_width)) ? ((screen_width-1) - glyphx - slot->bitmap_left) : bm->width; + for (xx = 0; xx < width; xx++) { + *dst = (*dst * (256-*src) + b * *src) >> 8; + ++dst; + *dst = (*dst * (256-*src) + g * *src) >> 8; + ++dst; + *dst = (*dst * (256-*src) + r * *src) >> 8; + ++dst; + *dst++ = 0; + ++src; + } + } + } +} + unsigned my_draw_text(const widestring &str, unsigned char *buf, double size, const std::string &theme_element, int xpos, int ypos) { - FT_GlyphSlot slot; - int x = 0; + int start_xpos = xpos; int r = atoi(get_theme_config(theme_element, "red").c_str()); int g = atoi(get_theme_config(theme_element, "green").c_str()); @@ -95,71 +141,91 @@ unsigned my_draw_text(const widestring &str, unsigned char *buf, double size, co xpos = xpos * screen_width / LOGICAL_SCREEN_WIDTH; ypos = ypos * screen_height / LOGICAL_SCREEN_HEIGHT; - for (widestring::const_iterator i = str.begin(); i != str.end(); ++i) { - int glyph_index; - for (std::vector::const_iterator j = fonts.begin(); j != fonts.end(); ++j) { - glyph_index = FT_Get_Char_Index(*j, *i); - if (glyph_index == 0) - continue; + // Itemize the text into parts that will be shaped and rendered separately. + PangoContext *context = pango_context_new(); + PangoFontMap *fontmap = pango_ft2_font_map_new(); + pango_context_set_font_map(context, fontmap); + PangoAttrList *attrs = pango_attr_list_new(); + std::string utf8str = str.to_utf8(); + GList *items = pango_itemize(context, utf8str.data(), 0, utf8str.size(), attrs, NULL); + for (GList *item_it = items; item_it != NULL; item_it = item_it->next) { + PangoItem *item = (PangoItem *)(item_it->data); + PangoAnalysis *analysis = &item->analysis; - if (use_lcd) { - if (FT_Load_Glyph(*j, glyph_index, FT_LOAD_RENDER | FT_LOAD_TARGET_LCD)) - throw std::runtime_error("Couldn't load glyph"); - } else { - if (FT_Load_Glyph(*j, glyph_index, FT_LOAD_RENDER)) - throw std::runtime_error("Couldn't load glyph"); + // Try to shape and render it in each of the fonts in turn. + for (std::vector::const_iterator face_it = fonts.begin(); face_it != fonts.end(); ++face_it) { + // The buffer seemingly needs to be created anew for each try. + hb_buffer_t *hbuf = hb_buffer_create(); + hb_buffer_set_unicode_funcs(hbuf, hb_icu_get_unicode_funcs()); + hb_direction_t dir = PANGO_GRAVITY_IS_VERTICAL(analysis->gravity) ? HB_DIRECTION_TTB : HB_DIRECTION_LTR; + if (analysis->level % 2) + dir = HB_DIRECTION_REVERSE(dir); + if (PANGO_GRAVITY_IS_IMPROPER (analysis->gravity)) + dir = HB_DIRECTION_REVERSE(dir); + + hb_buffer_set_direction(hbuf, dir); + hb_buffer_set_script(hbuf, hb_glib_script_to_script((GUnicodeScript)analysis->script)); + hb_buffer_set_language(hbuf, hb_language_from_string(pango_language_to_string(analysis->language), -1)); + hb_buffer_add_utf8(hbuf, utf8str.data(), utf8str.size(), item->offset, item->length); + + // Font-specifics. + FT_Face face = *face_it; + hb_font_t *font = hb_ft_font_create(face, NULL); + hb_shape(font, hbuf, NULL, 0); + unsigned glyph_count; + hb_glyph_info_t *glyph_info = hb_buffer_get_glyph_infos(hbuf, &glyph_count); + hb_glyph_position_t *glyph_pos = hb_buffer_get_glyph_positions(hbuf, &glyph_count); + + bool found_all = true; + for (unsigned i = 0; i < glyph_count; ++i) { + if (glyph_info[i].codepoint == 0) { + found_all = false; + } + break; } - slot = (*j)->glyph; - break; - } - if (glyph_index == 0) { - std::fprintf(stderr, "Warning: Could not find a glyph in any font for U+%x, ignoring\n", *i); - continue; - } - if (buf != NULL) { - int y; - FT_Bitmap *bm = &(slot->bitmap); - for (y = 0; y < bm->rows; y++) { - int xx; - int dsty = ypos - slot->bitmap_top + y; - if (dsty < 0 || dsty > signed(screen_height-1)) continue; + if (!found_all) { + std::string utf8itemstr(&utf8str[item->offset], &utf8str[item->offset + item->length]); + if (face_it + 1 == fonts.end()) { + std::fprintf(stderr, "Warning: Could not find any font to render item '%s', rendering in last font anyway\n", utf8itemstr.c_str()); + } else { + hb_font_destroy(font); + hb_buffer_destroy(hbuf); + continue; + } + } - unsigned char *dst = buf + dsty * screen_width*4 + (x + xpos + slot->bitmap_left)*4; - unsigned char *src = bm->buffer + y * bm->pitch; + for (unsigned i = 0; i < glyph_count; ++i) { if (use_lcd) { - int width = (x + xpos + slot->bitmap_left + bm->width/3 >= signed(screen_width)) ? ((screen_width-1) - x - xpos - slot->bitmap_left) : bm->width/3; - for (xx = 0; xx < width; xx++) { - *dst = (*dst * (256-src[2]) + b * src[2]) >> 8; - ++dst; - *dst = (*dst * (256-src[1]) + g * src[1]) >> 8; - ++dst; - *dst = (*dst * (256-src[0]) + r * src[0]) >> 8; - ++dst; - *dst++ = 0; - - src += 3; - } + if (FT_Load_Glyph(face, glyph_info[i].codepoint, FT_LOAD_RENDER | FT_LOAD_TARGET_LCD)) + throw std::runtime_error("Couldn't load glyph"); } else { - int width = (x + xpos + slot->bitmap_left + bm->width >= signed(screen_width)) ? ((screen_width-1) - x - xpos - slot->bitmap_left) : bm->width; - for (xx = 0; xx < width; xx++) { - *dst = (*dst * (256-*src) + b * *src) >> 8; - ++dst; - *dst = (*dst * (256-*src) + g * *src) >> 8; - ++dst; - *dst = (*dst * (256-*src) + r * *src) >> 8; - ++dst; - *dst++ = 0; - ++src; - } + if (FT_Load_Glyph(face, glyph_info[i].codepoint, FT_LOAD_RENDER)) + throw std::runtime_error("Couldn't load glyph"); + } + + int glyphx = xpos + glyph_pos[i].x_offset / 64; + int glyphy = ypos - glyph_pos[i].y_offset / 64; + + if (buf != NULL) { + render_glyph(face->glyph, glyphx, glyphy, buf, r, g, b, use_lcd); } + + xpos += glyph_pos[i].x_advance / 64; + ypos -= glyph_pos[i].y_advance / 64; } + hb_font_destroy(font); + hb_buffer_destroy(hbuf); + break; } - - x += slot->advance.x >> 6; + pango_item_free(item); } + g_list_free(items); + pango_attr_list_unref(attrs); + g_object_unref(fontmap); + g_object_unref(context); - return x * LOGICAL_SCREEN_WIDTH / screen_width; + return (xpos - start_xpos) * LOGICAL_SCREEN_WIDTH / screen_width; } void my_draw_text_deferred(std::vector &td, const widestring &str, double size, const std::string &theme_element, const std::string &fresh_theme_element, int xpos, int ypos)