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 <pixelflinger/pixelflinger.h> 32 33 #include "font_10x18.h" 34 #include "minui.h" 35 36 #if defined(RECOVERY_BGRA) 37 #define PIXEL_FORMAT GGL_PIXEL_FORMAT_BGRA_8888 38 #define PIXEL_SIZE 4 39 #elif defined(RECOVERY_RGBX) 40 #define PIXEL_FORMAT GGL_PIXEL_FORMAT_RGBX_8888 41 #define PIXEL_SIZE 4 42 #else 43 #define PIXEL_FORMAT GGL_PIXEL_FORMAT_RGB_565 44 #define PIXEL_SIZE 2 45 #endif 46 47 #define NUM_BUFFERS 2 48 49 typedef struct { 50 GGLSurface* texture; 51 unsigned cwidth; 52 unsigned cheight; 53 } GRFont; 54 55 static GRFont *gr_font = 0; 56 static GGLContext *gr_context = 0; 57 static GGLSurface gr_font_texture; 58 static GGLSurface gr_framebuffer[NUM_BUFFERS]; 59 static GGLSurface gr_mem_surface; 60 static unsigned gr_active_fb = 0; 61 static unsigned double_buffering = 0; 62 static int overscan_percent = OVERSCAN_PERCENT; 63 static int overscan_offset_x = 0; 64 static int overscan_offset_y = 0; 65 66 static int gr_fb_fd = -1; 67 static int gr_vt_fd = -1; 68 69 static struct fb_var_screeninfo vi; 70 static struct fb_fix_screeninfo fi; 71 72 static int get_framebuffer(GGLSurface *fb) 73 { 74 int fd; 75 void *bits; 76 77 fd = open("/dev/graphics/fb0", O_RDWR); 78 if (fd < 0) { 79 perror("cannot open fb0"); 80 return -1; 81 } 82 83 if (ioctl(fd, FBIOGET_VSCREENINFO, &vi) < 0) { 84 perror("failed to get fb0 info"); 85 close(fd); 86 return -1; 87 } 88 89 vi.bits_per_pixel = PIXEL_SIZE * 8; 90 if (PIXEL_FORMAT == GGL_PIXEL_FORMAT_BGRA_8888) { 91 vi.red.offset = 8; 92 vi.red.length = 8; 93 vi.green.offset = 16; 94 vi.green.length = 8; 95 vi.blue.offset = 24; 96 vi.blue.length = 8; 97 vi.transp.offset = 0; 98 vi.transp.length = 8; 99 } else if (PIXEL_FORMAT == GGL_PIXEL_FORMAT_RGBX_8888) { 100 vi.red.offset = 24; 101 vi.red.length = 8; 102 vi.green.offset = 16; 103 vi.green.length = 8; 104 vi.blue.offset = 8; 105 vi.blue.length = 8; 106 vi.transp.offset = 0; 107 vi.transp.length = 8; 108 } else { /* RGB565*/ 109 vi.red.offset = 11; 110 vi.red.length = 5; 111 vi.green.offset = 5; 112 vi.green.length = 6; 113 vi.blue.offset = 0; 114 vi.blue.length = 5; 115 vi.transp.offset = 0; 116 vi.transp.length = 0; 117 } 118 if (ioctl(fd, FBIOPUT_VSCREENINFO, &vi) < 0) { 119 perror("failed to put fb0 info"); 120 close(fd); 121 return -1; 122 } 123 124 if (ioctl(fd, FBIOGET_FSCREENINFO, &fi) < 0) { 125 perror("failed to get fb0 info"); 126 close(fd); 127 return -1; 128 } 129 130 bits = mmap(0, fi.smem_len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 131 if (bits == MAP_FAILED) { 132 perror("failed to mmap framebuffer"); 133 close(fd); 134 return -1; 135 } 136 137 overscan_offset_x = vi.xres * overscan_percent / 100; 138 overscan_offset_y = vi.yres * overscan_percent / 100; 139 140 fb->version = sizeof(*fb); 141 fb->width = vi.xres; 142 fb->height = vi.yres; 143 fb->stride = fi.line_length/PIXEL_SIZE; 144 fb->data = bits; 145 fb->format = PIXEL_FORMAT; 146 memset(fb->data, 0, vi.yres * fi.line_length); 147 148 fb++; 149 150 /* check if we can use double buffering */ 151 if (vi.yres * fi.line_length * 2 > fi.smem_len) 152 return fd; 153 154 double_buffering = 1; 155 156 fb->version = sizeof(*fb); 157 fb->width = vi.xres; 158 fb->height = vi.yres; 159 fb->stride = fi.line_length/PIXEL_SIZE; 160 fb->data = (void*) (((unsigned) bits) + vi.yres * fi.line_length); 161 fb->format = PIXEL_FORMAT; 162 memset(fb->data, 0, vi.yres * fi.line_length); 163 164 return fd; 165 } 166 167 static void get_memory_surface(GGLSurface* ms) { 168 ms->version = sizeof(*ms); 169 ms->width = vi.xres; 170 ms->height = vi.yres; 171 ms->stride = fi.line_length/PIXEL_SIZE; 172 ms->data = malloc(fi.line_length * vi.yres); 173 ms->format = PIXEL_FORMAT; 174 } 175 176 static void set_active_framebuffer(unsigned n) 177 { 178 if (n > 1 || !double_buffering) return; 179 vi.yres_virtual = vi.yres * NUM_BUFFERS; 180 vi.yoffset = n * vi.yres; 181 vi.bits_per_pixel = PIXEL_SIZE * 8; 182 if (ioctl(gr_fb_fd, FBIOPUT_VSCREENINFO, &vi) < 0) { 183 perror("active fb swap failed"); 184 } 185 } 186 187 void gr_flip(void) 188 { 189 GGLContext *gl = gr_context; 190 191 /* swap front and back buffers */ 192 if (double_buffering) 193 gr_active_fb = (gr_active_fb + 1) & 1; 194 195 /* copy data from the in-memory surface to the buffer we're about 196 * to make active. */ 197 memcpy(gr_framebuffer[gr_active_fb].data, gr_mem_surface.data, 198 fi.line_length * vi.yres); 199 200 /* inform the display driver */ 201 set_active_framebuffer(gr_active_fb); 202 } 203 204 void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a) 205 { 206 GGLContext *gl = gr_context; 207 GGLint color[4]; 208 color[0] = ((r << 8) | r) + 1; 209 color[1] = ((g << 8) | g) + 1; 210 color[2] = ((b << 8) | b) + 1; 211 color[3] = ((a << 8) | a) + 1; 212 gl->color4xv(gl, color); 213 } 214 215 int gr_measure(const char *s) 216 { 217 return gr_font->cwidth * strlen(s); 218 } 219 220 void gr_font_size(int *x, int *y) 221 { 222 *x = gr_font->cwidth; 223 *y = gr_font->cheight; 224 } 225 226 int gr_text(int x, int y, const char *s, int bold) 227 { 228 GGLContext *gl = gr_context; 229 GRFont *font = gr_font; 230 unsigned off; 231 232 if (!font->texture) return x; 233 234 bold = bold && (font->texture->height != font->cheight); 235 236 x += overscan_offset_x; 237 y += overscan_offset_y; 238 239 gl->bindTexture(gl, font->texture); 240 gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE); 241 gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE); 242 gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE); 243 gl->enable(gl, GGL_TEXTURE_2D); 244 245 while((off = *s++)) { 246 off -= 32; 247 if (off < 96) { 248 gl->texCoord2i(gl, (off * font->cwidth) - x, 249 (bold ? font->cheight : 0) - y); 250 gl->recti(gl, x, y, x + font->cwidth, y + font->cheight); 251 } 252 x += font->cwidth; 253 } 254 255 return x; 256 } 257 258 void gr_texticon(int x, int y, gr_surface icon) { 259 if (gr_context == NULL || icon == NULL) { 260 return; 261 } 262 GGLContext* gl = gr_context; 263 264 x += overscan_offset_x; 265 y += overscan_offset_y; 266 267 gl->bindTexture(gl, (GGLSurface*) icon); 268 gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE); 269 gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE); 270 gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE); 271 gl->enable(gl, GGL_TEXTURE_2D); 272 273 int w = gr_get_width(icon); 274 int h = gr_get_height(icon); 275 276 gl->texCoord2i(gl, -x, -y); 277 gl->recti(gl, x, y, x+gr_get_width(icon), y+gr_get_height(icon)); 278 } 279 280 void gr_fill(int x1, int y1, int x2, int y2) 281 { 282 x1 += overscan_offset_x; 283 y1 += overscan_offset_y; 284 285 x2 += overscan_offset_x; 286 y2 += overscan_offset_y; 287 288 GGLContext *gl = gr_context; 289 gl->disable(gl, GGL_TEXTURE_2D); 290 gl->recti(gl, x1, y1, x2, y2); 291 } 292 293 void gr_blit(gr_surface source, int sx, int sy, int w, int h, int dx, int dy) { 294 if (gr_context == NULL || source == NULL) { 295 return; 296 } 297 GGLContext *gl = gr_context; 298 299 dx += overscan_offset_x; 300 dy += overscan_offset_y; 301 302 gl->bindTexture(gl, (GGLSurface*) source); 303 gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE); 304 gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE); 305 gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE); 306 gl->enable(gl, GGL_TEXTURE_2D); 307 gl->texCoord2i(gl, sx - dx, sy - dy); 308 gl->recti(gl, dx, dy, dx + w, dy + h); 309 } 310 311 unsigned int gr_get_width(gr_surface surface) { 312 if (surface == NULL) { 313 return 0; 314 } 315 return ((GGLSurface*) surface)->width; 316 } 317 318 unsigned int gr_get_height(gr_surface surface) { 319 if (surface == NULL) { 320 return 0; 321 } 322 return ((GGLSurface*) surface)->height; 323 } 324 325 static void gr_init_font(void) 326 { 327 gr_font = calloc(sizeof(*gr_font), 1); 328 329 int res = res_create_surface("font", (void**)&(gr_font->texture)); 330 if (res == 0) { 331 // The font image should be a 96x2 array of character images. The 332 // columns are the printable ASCII characters 0x20 - 0x7f. The 333 // top row is regular text; the bottom row is bold. 334 gr_font->cwidth = gr_font->texture->width / 96; 335 gr_font->cheight = gr_font->texture->height / 2; 336 } else { 337 printf("failed to read font: res=%d\n", res); 338 339 // fall back to the compiled-in font. 340 gr_font->texture = malloc(sizeof(*gr_font->texture)); 341 gr_font->texture->width = font.width; 342 gr_font->texture->height = font.height; 343 gr_font->texture->stride = font.width; 344 345 unsigned char* bits = malloc(font.width * font.height); 346 gr_font->texture->data = (void*) bits; 347 348 unsigned char data; 349 unsigned char* in = font.rundata; 350 while((data = *in++)) { 351 memset(bits, (data & 0x80) ? 255 : 0, data & 0x7f); 352 bits += (data & 0x7f); 353 } 354 355 gr_font->cwidth = font.cwidth; 356 gr_font->cheight = font.cheight; 357 } 358 359 // interpret the grayscale as alpha 360 gr_font->texture->format = GGL_PIXEL_FORMAT_A_8; 361 } 362 363 int gr_init(void) 364 { 365 gglInit(&gr_context); 366 GGLContext *gl = gr_context; 367 368 gr_init_font(); 369 gr_vt_fd = open("/dev/tty0", O_RDWR | O_SYNC); 370 if (gr_vt_fd < 0) { 371 // This is non-fatal; post-Cupcake kernels don't have tty0. 372 perror("can't open /dev/tty0"); 373 } else if (ioctl(gr_vt_fd, KDSETMODE, (void*) KD_GRAPHICS)) { 374 // However, if we do open tty0, we expect the ioctl to work. 375 perror("failed KDSETMODE to KD_GRAPHICS on tty0"); 376 gr_exit(); 377 return -1; 378 } 379 380 gr_fb_fd = get_framebuffer(gr_framebuffer); 381 if (gr_fb_fd < 0) { 382 gr_exit(); 383 return -1; 384 } 385 386 get_memory_surface(&gr_mem_surface); 387 388 fprintf(stderr, "framebuffer: fd %d (%d x %d)\n", 389 gr_fb_fd, gr_framebuffer[0].width, gr_framebuffer[0].height); 390 391 /* start with 0 as front (displayed) and 1 as back (drawing) */ 392 gr_active_fb = 0; 393 set_active_framebuffer(0); 394 gl->colorBuffer(gl, &gr_mem_surface); 395 396 gl->activeTexture(gl, 0); 397 gl->enable(gl, GGL_BLEND); 398 gl->blendFunc(gl, GGL_SRC_ALPHA, GGL_ONE_MINUS_SRC_ALPHA); 399 400 gr_fb_blank(true); 401 gr_fb_blank(false); 402 403 return 0; 404 } 405 406 void gr_exit(void) 407 { 408 close(gr_fb_fd); 409 gr_fb_fd = -1; 410 411 free(gr_mem_surface.data); 412 413 ioctl(gr_vt_fd, KDSETMODE, (void*) KD_TEXT); 414 close(gr_vt_fd); 415 gr_vt_fd = -1; 416 } 417 418 int gr_fb_width(void) 419 { 420 return gr_framebuffer[0].width - 2*overscan_offset_x; 421 } 422 423 int gr_fb_height(void) 424 { 425 return gr_framebuffer[0].height - 2*overscan_offset_y; 426 } 427 428 gr_pixel *gr_fb_data(void) 429 { 430 return (unsigned short *) gr_mem_surface.data; 431 } 432 433 void gr_fb_blank(bool blank) 434 { 435 int ret; 436 437 ret = ioctl(gr_fb_fd, FBIOBLANK, blank ? FB_BLANK_POWERDOWN : FB_BLANK_UNBLANK); 438 if (ret < 0) 439 perror("ioctl(): blank"); 440 } 441
