libg15render
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00001 /* 00002 This file is part of g15tools. 00003 00004 g15tools is free software; you can redistribute it and/or modify 00005 it under the terms of the GNU General Public License as published by 00006 the Free Software Foundation; either version 2 of the License, or 00007 (at your option) any later version. 00008 00009 g15tools is distributed in the hope that it will be useful, 00010 but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00012 GNU General Public License for more details. 00013 00014 You should have received a copy of the GNU General Public License 00015 along with g15lcd; if not, write to the Free Software 00016 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 00017 */ 00018 00019 #include "libg15render.h" 00020 00021 void 00022 g15r_renderCharacterLarge (g15canvas * canvas, int col, int row, 00023 unsigned char character, unsigned int sx, 00024 unsigned int sy) 00025 { 00026 int helper = character * 8; /* for our font which is 8x8 */ 00027 00028 int top_left_pixel_x = sx + col * (8); /* 1 pixel spacing */ 00029 int top_left_pixel_y = sy + row * (8); /* once again 1 pixel spacing */ 00030 00031 int x, y; 00032 for (y = 0; y < 8; ++y) 00033 { 00034 for (x = 0; x < 8; ++x) 00035 { 00036 char font_entry = fontdata_8x8[helper + y]; 00037 00038 if (font_entry & 1 << (7 - x)) 00039 g15r_setPixel (canvas, top_left_pixel_x + x, top_left_pixel_y + y, 00040 G15_COLOR_BLACK); 00041 else 00042 g15r_setPixel (canvas, top_left_pixel_x + x, top_left_pixel_y + y, 00043 G15_COLOR_WHITE); 00044 00045 } 00046 } 00047 } 00048 00049 void 00050 g15r_renderCharacterMedium (g15canvas * canvas, int col, int row, 00051 unsigned char character, unsigned int sx, 00052 unsigned int sy) 00053 { 00054 int helper = character * 7 * 5; /* for our font which is 6x4 */ 00055 00056 int top_left_pixel_x = sx + col * (5); /* 1 pixel spacing */ 00057 int top_left_pixel_y = sy + row * (7); /* once again 1 pixel spacing */ 00058 00059 int x, y; 00060 for (y = 0; y < 7; ++y) 00061 { 00062 for (x = 0; x < 5; ++x) 00063 { 00064 char font_entry = fontdata_7x5[helper + y * 5 + x]; 00065 if (font_entry) 00066 g15r_setPixel (canvas, top_left_pixel_x + x, top_left_pixel_y + y, 00067 G15_COLOR_BLACK); 00068 else 00069 g15r_setPixel (canvas, top_left_pixel_x + x, top_left_pixel_y + y, 00070 G15_COLOR_WHITE); 00071 00072 } 00073 } 00074 } 00075 00076 void 00077 g15r_renderCharacterSmall (g15canvas * canvas, int col, int row, 00078 unsigned char character, unsigned int sx, 00079 unsigned int sy) 00080 { 00081 int helper = character * 6 * 4; /* for our font which is 6x4 */ 00082 00083 int top_left_pixel_x = sx + col * (4); /* 1 pixel spacing */ 00084 int top_left_pixel_y = sy + row * (6); /* once again 1 pixel spacing */ 00085 00086 int x, y; 00087 for (y = 0; y < 6; ++y) 00088 { 00089 for (x = 0; x < 4; ++x) 00090 { 00091 char font_entry = fontdata_6x4[helper + y * 4 + x]; 00092 if (font_entry) 00093 g15r_setPixel (canvas, top_left_pixel_x + x, top_left_pixel_y + y, 00094 G15_COLOR_BLACK); 00095 else 00096 g15r_setPixel (canvas, top_left_pixel_x + x, top_left_pixel_y + y, 00097 G15_COLOR_WHITE); 00098 00099 } 00100 } 00101 } 00102 00103 void 00104 g15r_renderString (g15canvas * canvas, unsigned char stringOut[], int row, 00105 int size, unsigned int sx, unsigned int sy) 00106 { 00107 00108 int i = 0; 00109 for (i; stringOut[i] != NULL; ++i) 00110 { 00111 switch (size) 00112 { 00113 case G15_TEXT_SMALL: 00114 { 00115 g15r_renderCharacterSmall (canvas, i, row, stringOut[i], sx, sy); 00116 break; 00117 } 00118 case G15_TEXT_MED: 00119 { 00120 g15r_renderCharacterMedium (canvas, i, row, stringOut[i], sx, sy); 00121 break; 00122 } 00123 case G15_TEXT_LARGE: 00124 { 00125 g15r_renderCharacterLarge (canvas, i, row, stringOut[i], sx, sy); 00126 break; 00127 } 00128 default: 00129 break; 00130 } 00131 } 00132 00133 } 00134 00135 #ifdef TTF_SUPPORT 00136 00144 void 00145 g15r_ttfLoad (g15canvas * canvas, char *fontname, int fontsize, int face_num) 00146 { 00147 int errcode = 0; 00148 00149 if (face_num < 0) 00150 face_num = 0; 00151 if (face_num > G15_MAX_FACE) 00152 face_num = G15_MAX_FACE; 00153 00154 if (canvas->ttf_fontsize[face_num]) 00155 FT_Done_Face (canvas->ttf_face[face_num][0]); /* destroy the last face */ 00156 00157 if (!canvas->ttf_fontsize[face_num] && !fontsize) 00158 canvas->ttf_fontsize[face_num] = 10; 00159 else 00160 canvas->ttf_fontsize[face_num] = fontsize; 00161 00162 errcode = 00163 FT_New_Face (canvas->ftLib, fontname, 0, &canvas->ttf_face[face_num][0]); 00164 if (errcode) 00165 { 00166 canvas->ttf_fontsize[face_num] = 0; 00167 } 00168 else 00169 { 00170 if (canvas->ttf_fontsize[face_num] 00171 && FT_IS_SCALABLE (canvas->ttf_face[face_num][0])) 00172 errcode = 00173 FT_Set_Char_Size (canvas->ttf_face[face_num][0], 0, 00174 canvas->ttf_fontsize[face_num] * 64, 90, 0); 00175 } 00176 } 00177 00178 int 00179 calc_ttf_true_ypos (FT_Face face, int y, int ttf_fontsize) 00180 { 00181 00182 if (!FT_IS_SCALABLE (face)) 00183 ttf_fontsize = face->available_sizes->height; 00184 00185 y += ttf_fontsize * .75; 00186 00187 return y; 00188 } 00189 00190 int 00191 calc_ttf_totalstringwidth (FT_Face face, char *str) 00192 { 00193 FT_GlyphSlot slot = face->glyph; 00194 FT_UInt glyph_index; 00195 int i, errcode; 00196 unsigned int len = strlen (str); 00197 int width = 0; 00198 00199 for (i = 0; i < len; i++) 00200 { 00201 glyph_index = FT_Get_Char_Index (face, str[i]); 00202 errcode = FT_Load_Glyph (face, glyph_index, 0); 00203 width += slot->advance.x >> 6; 00204 } 00205 return width; 00206 } 00207 00208 int 00209 calc_ttf_centering (FT_Face face, char *str) 00210 { 00211 int leftpos; 00212 00213 leftpos = 80 - (calc_ttf_totalstringwidth (face, str) / 2); 00214 if (leftpos < 1) 00215 leftpos = 1; 00216 00217 return leftpos; 00218 } 00219 00220 int 00221 calc_ttf_right_justify (FT_Face face, char *str) 00222 { 00223 int leftpos; 00224 00225 leftpos = 160 - calc_ttf_totalstringwidth (face, str); 00226 if (leftpos < 1) 00227 leftpos = 1; 00228 00229 return leftpos; 00230 } 00231 00232 void 00233 draw_ttf_char (g15canvas * canvas, FT_Bitmap charbitmap, 00234 unsigned char character, int x, int y, int color) 00235 { 00236 FT_Int char_x, char_y, p, q; 00237 FT_Int x_max = x + charbitmap.width; 00238 FT_Int y_max = y + charbitmap.rows; 00239 static FT_Bitmap tmpbuffer; 00240 00241 /* convert to 8bit format.. */ 00242 FT_Bitmap_Convert (canvas->ftLib, &charbitmap, &tmpbuffer, 1); 00243 00244 for (char_y = y, q = 0; char_y < y_max; char_y++, q++) 00245 for (char_x = x, p = 0; char_x < x_max; char_x++, p++) 00246 if (tmpbuffer.buffer[q * tmpbuffer.width + p]) 00247 g15r_setPixel (canvas, char_x, char_y, color); 00248 } 00249 00250 void 00251 draw_ttf_str (g15canvas * canvas, char *str, int x, int y, int color, 00252 FT_Face face) 00253 { 00254 FT_GlyphSlot slot = face->glyph; 00255 int i, errcode; 00256 unsigned int len = strlen (str); 00257 00258 for (i = 0; i < len; i++) 00259 { 00260 errcode = 00261 FT_Load_Char (face, str[i], 00262 FT_LOAD_RENDER | FT_LOAD_MONOCHROME | 00263 FT_LOAD_TARGET_MONO); 00264 draw_ttf_char (canvas, slot->bitmap, str[i], x + slot->bitmap_left, 00265 y - slot->bitmap_top, color); 00266 x += slot->advance.x >> 6; 00267 } 00268 } 00269 00282 void 00283 g15r_ttfPrint (g15canvas * canvas, int x, int y, int fontsize, int face_num, 00284 int color, int center, char *print_string) 00285 { 00286 int errcode = 0; 00287 00288 if (canvas->ttf_fontsize[face_num]) 00289 { 00290 if (fontsize > 0 && FT_IS_SCALABLE (canvas->ttf_face[face_num][0])) 00291 { 00292 canvas->ttf_fontsize[face_num] = fontsize; 00293 int errcode = 00294 FT_Set_Pixel_Sizes (canvas->ttf_face[face_num][0], 0, 00295 canvas->ttf_fontsize[face_num]); 00296 if (errcode) 00297 printf ("Trouble setting the Glyph size!\n"); 00298 } 00299 y = 00300 calc_ttf_true_ypos (canvas->ttf_face[face_num][0], y, 00301 canvas->ttf_fontsize[face_num]); 00302 if (center == 1) 00303 x = calc_ttf_centering (canvas->ttf_face[face_num][0], print_string); 00304 else if (center == 2) 00305 x = calc_ttf_right_justify (canvas->ttf_face[face_num][0], print_string); 00306 draw_ttf_str (canvas, print_string, x, y, color, 00307 canvas->ttf_face[face_num][0]); 00308 } 00309 } 00310 #endif /* TTF_SUPPORT */