1 /* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <stdbool.h> 18 #include <stdlib.h> 19 #include <unistd.h> 20 21 #include <fcntl.h> 22 #include <stdio.h> 23 24 #include <sys/ioctl.h> 25 #include <sys/mman.h> 26 #include <sys/types.h> 27 28 #include <linux/fb.h> 29 #include <linux/kd.h> 30 31 #include <time.h> 32 33 #include "font_10x18.h" 34 #include "minui.h" 35 #include "graphics.h" 36 37 typedef struct { 38 GRSurface* texture; 39 int cwidth; 40 int cheight; 41 } GRFont; 42 43 static GRFont* gr_font = NULL; 44 static minui_backend* gr_backend = NULL; 45 46 static int overscan_percent = OVERSCAN_PERCENT; 47 static int overscan_offset_x = 0; 48 static int overscan_offset_y = 0; 49 50 static int gr_vt_fd = -1; 51 52 static unsigned char gr_current_r = 255; 53 static unsigned char gr_current_g = 255; 54 static unsigned char gr_current_b = 255; 55 static unsigned char gr_current_a = 255; 56 57 static GRSurface* gr_draw = NULL; 58 59 static bool outside(int x, int y) 60 { 61 return x < 0 || x >= gr_draw->width || y < 0 || y >= gr_draw->height; 62 } 63 64 int gr_measure(const char *s) 65 { 66 return gr_font->cwidth * strlen(s); 67 } 68 69 void gr_font_size(int *x, int *y) 70 { 71 *x = gr_font->cwidth; 72 *y = gr_font->cheight; 73 } 74 75 static void text_blend(unsigned char* src_p, int src_row_bytes, 76 unsigned char* dst_p, int dst_row_bytes, 77 int width, int height) 78 { 79 int i, j; 80 for (j = 0; j < height; ++j) { 81 unsigned char* sx = src_p; 82 unsigned char* px = dst_p; 83 for (i = 0; i < width; ++i) { 84 unsigned char a = *sx++; 85 if (gr_current_a < 255) a = ((int)a * gr_current_a) / 255; 86 if (a == 255) { 87 *px++ = gr_current_r; 88 *px++ = gr_current_g; 89 *px++ = gr_current_b; 90 px++; 91 } else if (a > 0) { 92 *px = (*px * (255-a) + gr_current_r * a) / 255; 93 ++px; 94 *px = (*px * (255-a) + gr_current_g * a) / 255; 95 ++px; 96 *px = (*px * (255-a) + gr_current_b * a) / 255; 97 ++px; 98 ++px; 99 } else { 100 px += 4; 101 } 102 } 103 src_p += src_row_bytes; 104 dst_p += dst_row_bytes; 105 } 106 } 107 108 109 void gr_text(int x, int y, const char *s, int bold) 110 { 111 GRFont *font = gr_font; 112 unsigned off; 113 114 if (!font->texture) return; 115 if (gr_current_a == 0) return; 116 117 bold = bold && (font->texture->height != font->cheight); 118 119 x += overscan_offset_x; 120 y += overscan_offset_y; 121 122 while((off = *s++)) { 123 off -= 32; 124 if (outside(x, y) || outside(x+font->cwidth-1, y+font->cheight-1)) break; 125 if (off < 96) { 126 127 unsigned char* src_p = font->texture->data + (off * font->cwidth) + 128 (bold ? font->cheight * font->texture->row_bytes : 0); 129 unsigned char* dst_p = gr_draw->data + y*gr_draw->row_bytes + x*gr_draw->pixel_bytes; 130 131 text_blend(src_p, font->texture->row_bytes, 132 dst_p, gr_draw->row_bytes, 133 font->cwidth, font->cheight); 134 135 } 136 x += font->cwidth; 137 } 138 } 139 140 void gr_texticon(int x, int y, GRSurface* icon) { 141 if (icon == NULL) return; 142 143 if (icon->pixel_bytes != 1) { 144 printf("gr_texticon: source has wrong format\n"); 145 return; 146 } 147 148 x += overscan_offset_x; 149 y += overscan_offset_y; 150 151 if (outside(x, y) || outside(x+icon->width-1, y+icon->height-1)) return; 152 153 unsigned char* src_p = icon->data; 154 unsigned char* dst_p = gr_draw->data + y*gr_draw->row_bytes + x*gr_draw->pixel_bytes; 155 156 text_blend(src_p, icon->row_bytes, 157 dst_p, gr_draw->row_bytes, 158 icon->width, icon->height); 159 } 160 161 void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a) 162 { 163 gr_current_r = r; 164 gr_current_g = g; 165 gr_current_b = b; 166 gr_current_a = a; 167 } 168 169 void gr_clear() 170 { 171 if (gr_current_r == gr_current_g && 172 gr_current_r == gr_current_b) { 173 memset(gr_draw->data, gr_current_r, gr_draw->height * gr_draw->row_bytes); 174 } else { 175 int x, y; 176 unsigned char* px = gr_draw->data; 177 for (y = 0; y < gr_draw->height; ++y) { 178 for (x = 0; x < gr_draw->width; ++x) { 179 *px++ = gr_current_r; 180 *px++ = gr_current_g; 181 *px++ = gr_current_b; 182 px++; 183 } 184 px += gr_draw->row_bytes - (gr_draw->width * gr_draw->pixel_bytes); 185 } 186 } 187 } 188 189 void gr_fill(int x1, int y1, int x2, int y2) 190 { 191 x1 += overscan_offset_x; 192 y1 += overscan_offset_y; 193 194 x2 += overscan_offset_x; 195 y2 += overscan_offset_y; 196 197 if (outside(x1, y1) || outside(x2-1, y2-1)) return; 198 199 unsigned char* p = gr_draw->data + y1 * gr_draw->row_bytes + x1 * gr_draw->pixel_bytes; 200 if (gr_current_a == 255) { 201 int x, y; 202 for (y = y1; y < y2; ++y) { 203 unsigned char* px = p; 204 for (x = x1; x < x2; ++x) { 205 *px++ = gr_current_r; 206 *px++ = gr_current_g; 207 *px++ = gr_current_b; 208 px++; 209 } 210 p += gr_draw->row_bytes; 211 } 212 } else if (gr_current_a > 0) { 213 int x, y; 214 for (y = y1; y < y2; ++y) { 215 unsigned char* px = p; 216 for (x = x1; x < x2; ++x) { 217 *px = (*px * (255-gr_current_a) + gr_current_r * gr_current_a) / 255; 218 ++px; 219 *px = (*px * (255-gr_current_a) + gr_current_g * gr_current_a) / 255; 220 ++px; 221 *px = (*px * (255-gr_current_a) + gr_current_b * gr_current_a) / 255; 222 ++px; 223 ++px; 224 } 225 p += gr_draw->row_bytes; 226 } 227 } 228 } 229 230 void gr_blit(GRSurface* source, int sx, int sy, int w, int h, int dx, int dy) { 231 if (source == NULL) return; 232 233 if (gr_draw->pixel_bytes != source->pixel_bytes) { 234 printf("gr_blit: source has wrong format\n"); 235 return; 236 } 237 238 dx += overscan_offset_x; 239 dy += overscan_offset_y; 240 241 if (outside(dx, dy) || outside(dx+w-1, dy+h-1)) return; 242 243 unsigned char* src_p = source->data + sy*source->row_bytes + sx*source->pixel_bytes; 244 unsigned char* dst_p = gr_draw->data + dy*gr_draw->row_bytes + dx*gr_draw->pixel_bytes; 245 246 int i; 247 for (i = 0; i < h; ++i) { 248 memcpy(dst_p, src_p, w * source->pixel_bytes); 249 src_p += source->row_bytes; 250 dst_p += gr_draw->row_bytes; 251 } 252 } 253 254 unsigned int gr_get_width(GRSurface* surface) { 255 if (surface == NULL) { 256 return 0; 257 } 258 return surface->width; 259 } 260 261 unsigned int gr_get_height(GRSurface* surface) { 262 if (surface == NULL) { 263 return 0; 264 } 265 return surface->height; 266 } 267 268 static void gr_init_font(void) 269 { 270 gr_font = calloc(sizeof(*gr_font), 1); 271 272 int res = res_create_alpha_surface("font", &(gr_font->texture)); 273 if (res == 0) { 274 // The font image should be a 96x2 array of character images. The 275 // columns are the printable ASCII characters 0x20 - 0x7f. The 276 // top row is regular text; the bottom row is bold. 277 gr_font->cwidth = gr_font->texture->width / 96; 278 gr_font->cheight = gr_font->texture->height / 2; 279 } else { 280 printf("failed to read font: res=%d\n", res); 281 282 // fall back to the compiled-in font. 283 gr_font->texture = malloc(sizeof(*gr_font->texture)); 284 gr_font->texture->width = font.width; 285 gr_font->texture->height = font.height; 286 gr_font->texture->row_bytes = font.width; 287 gr_font->texture->pixel_bytes = 1; 288 289 unsigned char* bits = malloc(font.width * font.height); 290 gr_font->texture->data = (void*) bits; 291 292 unsigned char data; 293 unsigned char* in = font.rundata; 294 while((data = *in++)) { 295 memset(bits, (data & 0x80) ? 255 : 0, data & 0x7f); 296 bits += (data & 0x7f); 297 } 298 299 gr_font->cwidth = font.cwidth; 300 gr_font->cheight = font.cheight; 301 } 302 } 303 304 #if 0 305 // Exercises many of the gr_*() functions; useful for testing. 306 static void gr_test() { 307 GRSurface** images; 308 int frames; 309 int result = res_create_multi_surface("icon_installing", &frames, &images); 310 if (result < 0) { 311 printf("create surface %d\n", result); 312 gr_exit(); 313 return; 314 } 315 316 time_t start = time(NULL); 317 int x; 318 for (x = 0; x <= 1200; ++x) { 319 if (x < 400) { 320 gr_color(0, 0, 0, 255); 321 } else { 322 gr_color(0, (x-400)%128, 0, 255); 323 } 324 gr_clear(); 325 326 gr_color(255, 0, 0, 255); 327 gr_surface frame = images[x%frames]; 328 gr_blit(frame, 0, 0, frame->width, frame->height, x, 0); 329 330 gr_color(255, 0, 0, 128); 331 gr_fill(400, 150, 600, 350); 332 333 gr_color(255, 255, 255, 255); 334 gr_text(500, 225, "hello, world!", 0); 335 gr_color(255, 255, 0, 128); 336 gr_text(300+x, 275, "pack my box with five dozen liquor jugs", 1); 337 338 gr_color(0, 0, 255, 128); 339 gr_fill(gr_draw->width - 200 - x, 300, gr_draw->width - x, 500); 340 341 gr_draw = gr_backend->flip(gr_backend); 342 } 343 printf("getting end time\n"); 344 time_t end = time(NULL); 345 printf("got end time\n"); 346 printf("start %ld end %ld\n", (long)start, (long)end); 347 if (end > start) { 348 printf("%.2f fps\n", ((double)x) / (end-start)); 349 } 350 } 351 #endif 352 353 void gr_flip() { 354 gr_draw = gr_backend->flip(gr_backend); 355 } 356 357 int gr_init(void) 358 { 359 gr_init_font(); 360 361 gr_vt_fd = open("/dev/tty0", O_RDWR | O_SYNC); 362 if (gr_vt_fd < 0) { 363 // This is non-fatal; post-Cupcake kernels don't have tty0. 364 perror("can't open /dev/tty0"); 365 } else if (ioctl(gr_vt_fd, KDSETMODE, (void*) KD_GRAPHICS)) { 366 // However, if we do open tty0, we expect the ioctl to work. 367 perror("failed KDSETMODE to KD_GRAPHICS on tty0"); 368 gr_exit(); 369 return -1; 370 } 371 372 gr_backend = open_adf(); 373 if (gr_backend) { 374 gr_draw = gr_backend->init(gr_backend); 375 if (!gr_draw) { 376 gr_backend->exit(gr_backend); 377 } 378 } 379 380 if (!gr_draw) { 381 gr_backend = open_fbdev(); 382 gr_draw = gr_backend->init(gr_backend); 383 if (gr_draw == NULL) { 384 return -1; 385 } 386 } 387 388 overscan_offset_x = gr_draw->width * overscan_percent / 100; 389 overscan_offset_y = gr_draw->height * overscan_percent / 100; 390 391 gr_flip(); 392 gr_flip(); 393 394 return 0; 395 } 396 397 void gr_exit(void) 398 { 399 gr_backend->exit(gr_backend); 400 401 ioctl(gr_vt_fd, KDSETMODE, (void*) KD_TEXT); 402 close(gr_vt_fd); 403 gr_vt_fd = -1; 404 } 405 406 int gr_fb_width(void) 407 { 408 return gr_draw->width - 2*overscan_offset_x; 409 } 410 411 int gr_fb_height(void) 412 { 413 return gr_draw->height - 2*overscan_offset_y; 414 } 415 416 void gr_fb_blank(bool blank) 417 { 418 gr_backend->blank(gr_backend, blank); 419 } 420
