static void render(void) { ALLEGRO_COLOR white = al_map_rgba_f(1, 1, 1, 1); ALLEGRO_COLOR black = al_map_rgba_f(0, 0, 0, 1); ALLEGRO_COLOR red = al_map_rgba_f(1, 0, 0, 1); ALLEGRO_COLOR green = al_map_rgba_f(0, 0.5, 0, 1); ALLEGRO_COLOR blue = al_map_rgba_f(0.1, 0.2, 1, 1); int x, y, w, h, as, de, xpos, ypos; int target_w, target_h; ALLEGRO_USTR_INFO info, sub_info; const ALLEGRO_USTR *u; al_clear_to_color(white); al_hold_bitmap_drawing(true); al_draw_textf(ex.f1, black, 50, 50, 0, "Tulip (kerning)"); al_draw_textf(ex.f2, black, 50, 100, 0, "Tulip (no kerning)"); al_draw_textf(ex.f3, black, 50, 200, 0, "This font has a size of 12 pixels, " "the one above has 48 pixels."); al_hold_bitmap_drawing(false); al_hold_bitmap_drawing(true); al_draw_textf(ex.f3, red, 50, 220, 0, "The color can simply be changed."); al_hold_bitmap_drawing(false); al_hold_bitmap_drawing(true); al_draw_textf(ex.f3, green, 50, 240, 0, "Some unicode symbols:"); al_draw_textf(ex.f3, green, 50, 260, 0, "%s", get_string("symbols1")); al_draw_textf(ex.f3, green, 50, 280, 0, "%s", get_string("symbols2")); al_draw_textf(ex.f3, green, 50, 300, 0, "%s", get_string("symbols3")); #define OFF(x) al_ustr_offset(u, x) #define SUB(x, y) al_ref_ustr(&sub_info, u, OFF(x), OFF(y)) u = al_ref_cstr(&info, get_string("substr1")); al_draw_ustr(ex.f3, green, 50, 320, 0, SUB(0, 6)); u = al_ref_cstr(&info, get_string("substr2")); al_draw_ustr(ex.f3, green, 50, 340, 0, SUB(7, 11)); u = al_ref_cstr(&info, get_string("substr3")); al_draw_ustr(ex.f3, green, 50, 360, 0, SUB(4, 11)); u = al_ref_cstr(&info, get_string("substr4")); al_draw_ustr(ex.f3, green, 50, 380, 0, SUB(0, 11)); al_draw_textf(ex.f5, black, 50, 420, 0, "forced monochrome"); al_hold_bitmap_drawing(false); target_w = al_get_bitmap_width(al_get_target_bitmap()); target_h = al_get_bitmap_height(al_get_target_bitmap()); xpos = target_w - 10; ypos = target_h - 10; al_get_text_dimensions(ex.f4, "Allegro", &x, &y, &w, &h); as = al_get_font_ascent(ex.f4); de = al_get_font_descent(ex.f4); xpos -= w; ypos -= h; x += xpos; y += ypos; al_draw_rectangle(x, y, x + w, y + h, black, 0); al_draw_line(x, y + as, x + w, y + as, black, 0); al_draw_line(x, y + as + de, x + w, y + as + de, black, 0); al_hold_bitmap_drawing(true); al_draw_textf(ex.f4, blue, xpos, ypos, 0, "Allegro"); al_hold_bitmap_drawing(false); al_hold_bitmap_drawing(true); al_draw_textf(ex.f3, black, target_w, 0, ALLEGRO_ALIGN_RIGHT, "%.1f FPS", ex.fps); al_hold_bitmap_drawing(false); }
static void render(void) { ALLEGRO_COLOR white = al_map_rgba_f(1, 1, 1, 1); ALLEGRO_COLOR black = al_map_rgba_f(0, 0, 0, 1); ALLEGRO_COLOR red = al_map_rgba_f(1, 0, 0, 1); ALLEGRO_COLOR green = al_map_rgba_f(0, 0.5, 0, 1); ALLEGRO_COLOR blue = al_map_rgba_f(0.1, 0.2, 1, 1); ALLEGRO_COLOR purple = al_map_rgba_f(0.3, 0.1, 0.2, 1); int x, y, w, h, as, de, xpos, ypos; unsigned int index; int target_w, target_h; ALLEGRO_USTR_INFO info, sub_info; const ALLEGRO_USTR *u; ALLEGRO_USTR *tulip = al_ustr_new("Tulip"); ALLEGRO_USTR *dimension_text = al_ustr_new("Tulip"); ALLEGRO_USTR *vertical_text = al_ustr_new("Rose."); al_clear_to_color(white); al_hold_bitmap_drawing(true); al_draw_textf(ex.f1, black, 50, 20, 0, "Tulip (kerning)"); al_draw_textf(ex.f2, black, 50, 80, 0, "Tulip (no kerning)"); x = 50; y = 140; for (index = 0; index < al_ustr_length(dimension_text); index ++) { int cp = ustr_at(dimension_text, index); int bbx, bby, bbw, bbh; al_get_glyph_dimensions(ex.f2, cp, &bbx, &bby, &bbw, &bbh); al_draw_rectangle(x + bbx + 0.5, y + bby + 0.5, x + bbx + bbw - 0.5, y + bby + bbh - 0.5, blue, 1); al_draw_rectangle(x + 0.5, y + 0.5, x + bbx + bbw - 0.5, y + bby + bbh - 0.5, green, 1); al_draw_glyph(ex.f2, purple, x, y, cp); x += al_get_glyph_advance(ex.f2, cp, ALLEGRO_NO_KERNING); } al_draw_line(50.5, y+0.5, x+0.5, y+0.5, red, 1); al_draw_textf(ex.f2, black, x + 10, y, 0, "(dimensions)"); al_draw_textf(ex.f3, black, 50, 200, 0, "This font has a size of 12 pixels, " "the one above has 48 pixels."); al_hold_bitmap_drawing(false); al_hold_bitmap_drawing(true); al_draw_textf(ex.f3, red, 50, 220, 0, "The color can simply be changed.🐊← fallback glyph"); al_hold_bitmap_drawing(false); al_hold_bitmap_drawing(true); al_draw_textf(ex.f3, green, 50, 240, 0, "Some unicode symbols:"); al_draw_textf(ex.f3, green, 50, 260, 0, "%s", get_string("symbols1")); al_draw_textf(ex.f3, green, 50, 280, 0, "%s", get_string("symbols2")); al_draw_textf(ex.f3, green, 50, 300, 0, "%s", get_string("symbols3")); #define OFF(x) al_ustr_offset(u, x) #define SUB(x, y) al_ref_ustr(&sub_info, u, OFF(x), OFF(y)) u = al_ref_cstr(&info, get_string("substr1")); al_draw_ustr(ex.f3, green, 50, 320, 0, SUB(0, 6)); u = al_ref_cstr(&info, get_string("substr2")); al_draw_ustr(ex.f3, green, 50, 340, 0, SUB(7, 11)); u = al_ref_cstr(&info, get_string("substr3")); al_draw_ustr(ex.f3, green, 50, 360, 0, SUB(4, 11)); u = al_ref_cstr(&info, get_string("substr4")); al_draw_ustr(ex.f3, green, 50, 380, 0, SUB(0, 11)); al_draw_textf(ex.f5, black, 50, 395, 0, "forced monochrome"); /* Glyph rendering tests. */ al_draw_textf(ex.f3, red, 50, 410, 0, "Glyph adv Tu: %d, draw: ", al_get_glyph_advance(ex.f3, 'T', 'u')); x = 50; y = 425; for (index = 0; index < al_ustr_length(tulip); index ++) { int cp = ustr_at(tulip, index); /* Use al_get_glyph_advance for the stride, with no kerning. */ al_draw_glyph(ex.f3, red, x, y, cp); x += al_get_glyph_advance(ex.f3, cp, ALLEGRO_NO_KERNING); } x = 50; y = 440; /* First draw a red string using al_draw_text, that should be hidden * completely by the same text drawing in green per glyph * using al_draw_glyph and al_get_glyph_advance below. */ al_draw_ustr(ex.f3, red, x, y, 0, tulip); for (index = 0; index < al_ustr_length(tulip); index ++) { int cp = ustr_at(tulip, index); int ncp = (index < (al_ustr_length(tulip) - 1)) ? ustr_at(tulip, index + 1) : ALLEGRO_NO_KERNING; /* Use al_get_glyph_advance for the stride and apply kerning. */ al_draw_glyph(ex.f3, green, x, y, cp); x += al_get_glyph_advance(ex.f3, cp, ncp); } x = 50; y = 466; al_draw_ustr(ex.f3, red, x, y, 0, tulip); for (index = 0; index < al_ustr_length(tulip); index ++) { int cp = ustr_at(tulip, index); int bbx, bby, bbw, bbh; al_get_glyph_dimensions(ex.f3, cp, &bbx, &bby, &bbw, &bbh); al_draw_glyph(ex.f3, blue, x, y, cp); x += bbx + bbw; } x = 10; y = 30; for (index = 0; index < al_ustr_length(vertical_text); index ++) { int bbx, bby, bbw, bbh; int cp = ustr_at(vertical_text, index); /* Use al_get_glyph_dimensions for the height to apply. */ al_get_glyph_dimensions(ex.f3, cp, &bbx, &bby, &bbw, &bbh); al_draw_glyph(ex.f3, green, x, y, cp); y += bby; y += bbh; } x = 30; y = 30; for (index = 0; index < al_ustr_length(vertical_text); index ++) { int bbx, bby, bbw, bbh; int cp = ustr_at(vertical_text, index); /* Use al_get_glyph_dimensions for the height to apply, here bby is * omited for the wrong result. */ al_get_glyph_dimensions(ex.f3, cp, &bbx, &bby, &bbw, &bbh); al_draw_glyph(ex.f3, red, x, y, cp); y += bbh; } al_hold_bitmap_drawing(false); target_w = al_get_bitmap_width(al_get_target_bitmap()); target_h = al_get_bitmap_height(al_get_target_bitmap()); xpos = target_w - 10; ypos = target_h - 10; al_get_text_dimensions(ex.f4, "Allegro", &x, &y, &w, &h); as = al_get_font_ascent(ex.f4); de = al_get_font_descent(ex.f4); xpos -= w; ypos -= h; x += xpos; y += ypos; al_draw_rectangle(x, y, x + w - 0.5, y + h - 0.5, black, 0); al_draw_line(x+0.5, y + as + 0.5, x + w - 0.5, y + as + 0.5, black, 0); al_draw_line(x + 0.5, y + as + de + 0.5, x + w - 0.5, y + as + de + 0.5, black, 0); al_hold_bitmap_drawing(true); al_draw_textf(ex.f4, blue, xpos, ypos, 0, "Allegro"); al_hold_bitmap_drawing(false); al_hold_bitmap_drawing(true); al_draw_textf(ex.f3, black, target_w, 0, ALLEGRO_ALIGN_RIGHT, "%.1f FPS", ex.fps); al_draw_textf(ex.f3, black, 0, 0, 0, "%s: %d unicode ranges", font_file, ex.ranges_count); al_hold_bitmap_drawing(false); }
/** Returns the font descent. @return the font descent. */ int getDescent() const { return al_get_font_descent(get()); }