#include <stdexcept>
#include <map>
#include <string>
+#include <harfbuzz/hb.h>
+#include <harfbuzz/hb-ft.h>
+#include <harfbuzz/hb-glib.h>
+#include <harfbuzz/hb-icu.h>
+#include <pango/pango-context.h>
+#include <pango/pango-fontmap.h>
+#include <pango/pangoft2.h>
#include "fonts.h"
#include "resolution.h"
#include "theme.h"
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;
}
}
}
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());
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<FT_Face>::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<FT_Face>::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<TextDefer> &td, const widestring &str, double size, const std::string &theme_element, const std::string &fresh_theme_element, int xpos, int ypos)
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