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