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