/* copyright (c) 2007 magnus auvinen, see licence.txt for more info */ #include #include #include #include "ec_font.h" typedef struct { short x, y; short width, height; short x_offset, y_offset; short x_advance; } FONT_CHARACTER; typedef struct { short size; short width, height; short line_height; short base; FONT_CHARACTER characters[256]; short kerning[256*256]; } FONT_DATA; int font_load(FONT *font, const char *filename) { FONT_DATA font_data; IOHANDLE file; dbg_msg("font/load", "loading %s", filename); file = io_open(filename, IOFLAG_READ); if(file) { int i; io_read(file, &font_data, sizeof(FONT_DATA)); io_close(file); #if defined(CONF_ARCH_ENDIAN_BIG) swap_endian(&font_data, 2, sizeof(FONT_DATA)/2); #endif dbg_msg("font/load", "width: %d, height: %d, sizeof(FONT_DATA): %d", font_data.width, font_data.height, sizeof(FONT_DATA)); { float scale_factor_x = 1.0f/font_data.size; float scale_factor_y = 1.0f/font_data.size; float scale_factor_tex_x = 1.0f/font_data.width; float scale_factor_tex_y = 1.0f/font_data.height; for (i = 0; i < 256; i++) { float tex_x0 = font_data.characters[i].x*scale_factor_tex_x; float tex_y0 = font_data.characters[i].y*scale_factor_tex_y; float tex_x1 = (font_data.characters[i].x+font_data.characters[i].width)*scale_factor_tex_x; float tex_y1 = (font_data.characters[i].y+font_data.characters[i].height)*scale_factor_tex_y; float width = font_data.characters[i].width*scale_factor_x; float height = font_data.characters[i].height*scale_factor_y; float x_offset = font_data.characters[i].x_offset*scale_factor_x; float y_offset = font_data.characters[i].y_offset*scale_factor_y; float x_advance = (font_data.characters[i].x_advance>>6)*scale_factor_x; font->characters[i].tex_x0 = tex_x0; font->characters[i].tex_y0 = tex_y0; font->characters[i].tex_x1 = tex_x1; font->characters[i].tex_y1 = tex_y1; font->characters[i].width = width; font->characters[i].height = height; font->characters[i].x_offset = x_offset; font->characters[i].y_offset = y_offset; font->characters[i].x_advance = x_advance; } for (i = 0; i < 256*256; i++) { font->kerning[i] = font_data.kerning[i]*scale_factor_x; } } return 0; } else return -1; } int gfx_load_texture(const char *filename); int font_set_load(FONT_SET *font_set, const char *font_filename, const char *texture_filename, int fonts, ...) { int i; va_list va; font_set->font_count = fonts; va_start(va, fonts); for (i = 0; i < fonts; i++) { int size; char composed_font_filename[256]; char composed_texture_filename[256]; FONT *font = &font_set->fonts[i]; size = va_arg(va, int); sprintf(composed_font_filename, font_filename, size); sprintf(composed_texture_filename, texture_filename, size); if (font_load(font, composed_font_filename)) { va_end(va); return -1; } font->size = size; font->texture = gfx_load_texture(composed_texture_filename); dbg_msg("font_set/loading", "filename: %s", composed_font_filename); } va_end(va); return 0; } float font_set_string_width(FONT_SET *font_set, const char *string, float size) { float width = 0.0f; const unsigned char *c = (unsigned char *)string; FONT *font = &font_set->fonts[0]; while (*c) { float tex_x0, tex_y0, tex_x1, tex_y1; float char_width, char_height; float x_offset, y_offset, x_advance; font_character_info(font, *c, &tex_x0, &tex_y0, &tex_x1, &tex_y1, &char_width, &char_height, &x_offset, &y_offset, &x_advance); width += x_advance; c++; } return width*size; } void font_character_info(FONT *font, unsigned char c, float *tex_x0, float *tex_y0, float *tex_x1, float *tex_y1, float *width, float *height, float *x_offset, float *y_offset, float *x_advance) { CHARACTER *character = &font->characters[c]; *tex_x0 = character->tex_x0; *tex_y0 = character->tex_y0; *tex_x1 = character->tex_x1; *tex_y1 = character->tex_y1; *width = character->width; *height = character->height; *x_offset = character->x_offset; *y_offset = character->y_offset; *x_advance = character->x_advance; } float font_kerning(FONT *font, unsigned char c1, unsigned char c2) { return font->kerning[c1 + c2*256]; } FONT *font_set_pick(FONT_SET *font_set, float size) { int i; FONT *picked_font = 0x0; for (i = font_set->font_count-1; i >= 0; i--) { FONT *font = &font_set->fonts[i]; if (font->size >= size) picked_font = font; } if (!picked_font) picked_font = &font_set->fonts[font_set->font_count-1]; return picked_font; }