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 <stdlib.h> 18 #include <unistd.h> 19 20 #include <fcntl.h> 21 #include <stdio.h> 22 23 #include <sys/ioctl.h> 24 #include <sys/mman.h> 25 #include <sys/types.h> 26 #include <time.h> 27 28 #include <linux/fb.h> 29 #include <linux/kd.h> 30 31 #include <pixelflinger/pixelflinger.h> 32 33 #include "minui.h" 34 35 typedef struct { 36 GGLSurface texture; 37 unsigned cwidth; 38 unsigned cheight; 39 unsigned ascent; 40 } GRFont; 41 42 static GGLContext *gr_context = 0; 43 static GGLSurface gr_framebuffer[2]; 44 static unsigned gr_active_fb = 0; 45 46 static int gr_fb_fd = -1; 47 static int gr_vt_fd = -1; 48 49 static struct fb_var_screeninfo vi; 50 struct fb_fix_screeninfo fi; 51 struct timespec tv, tv2; 52 53 static void dumpinfo(struct fb_fix_screeninfo *fi, 54 struct fb_var_screeninfo *vi); 55 56 static int get_framebuffer(GGLSurface *fb) 57 { 58 int fd; 59 void *bits; 60 61 fd = open("/dev/graphics/fb0", O_RDWR); 62 if (fd < 0) { 63 printf("cannot open /dev/graphics/fb0, retrying with /dev/fb0\n"); 64 if ((fd = open("/dev/fb0", O_RDWR)) < 0) { 65 perror("cannot open /dev/fb0"); 66 return -1; 67 } 68 } 69 70 if(ioctl(fd, FBIOGET_FSCREENINFO, &fi) < 0) { 71 perror("failed to get fb0 info"); 72 return -1; 73 } 74 75 if(ioctl(fd, FBIOGET_VSCREENINFO, &vi) < 0) { 76 perror("failed to get fb0 info"); 77 return -1; 78 } 79 80 dumpinfo(&fi, &vi); 81 82 bits = mmap(0, fi.smem_len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 83 if(bits == MAP_FAILED) { 84 perror("failed to mmap framebuffer"); 85 return -1; 86 } 87 88 fb->version = sizeof(*fb); 89 fb->width = vi.xres; 90 fb->height = vi.yres; 91 fb->stride = fi.line_length / (vi.bits_per_pixel >> 3); 92 fb->data = bits; 93 fb->format = GGL_PIXEL_FORMAT_RGB_565; 94 95 fb++; 96 97 fb->version = sizeof(*fb); 98 fb->width = vi.xres; 99 fb->height = vi.yres; 100 fb->stride = fi.line_length / (vi.bits_per_pixel >> 3); 101 fb->data = (void*) (((unsigned) bits) + vi.yres * vi.xres * 2); 102 fb->format = GGL_PIXEL_FORMAT_RGB_565; 103 104 return fd; 105 } 106 107 static void set_active_framebuffer(unsigned n) 108 { 109 if(n > 1) return; 110 vi.yres_virtual = vi.yres * 2; 111 vi.yoffset = n * vi.yres; 112 if(ioctl(gr_fb_fd, FBIOPUT_VSCREENINFO, &vi) < 0) { 113 fprintf(stderr,"active fb swap failed!\n"); 114 } else 115 printf("active buffer: %d\n", n); 116 } 117 118 static void dumpinfo(struct fb_fix_screeninfo *fi, struct fb_var_screeninfo *vi) 119 { 120 fprintf(stderr,"vi.xres = %d\n", vi->xres); 121 fprintf(stderr,"vi.yres = %d\n", vi->yres); 122 fprintf(stderr,"vi.xresv = %d\n", vi->xres_virtual); 123 fprintf(stderr,"vi.yresv = %d\n", vi->yres_virtual); 124 fprintf(stderr,"vi.xoff = %d\n", vi->xoffset); 125 fprintf(stderr,"vi.yoff = %d\n", vi->yoffset); 126 fprintf(stderr, "vi.bits_per_pixel = %d\n", vi->bits_per_pixel); 127 128 fprintf(stderr, "fi.line_length = %d\n", fi->line_length); 129 130 } 131 132 int gr_init(void) 133 { 134 int fd = -1; 135 136 if (!access("/dev/tty0", F_OK)) { 137 fd = open("/dev/tty0", O_RDWR | O_SYNC); 138 if(fd < 0) 139 return -1; 140 141 if(ioctl(fd, KDSETMODE, (void*) KD_GRAPHICS)) { 142 close(fd); 143 return -1; 144 } 145 } 146 147 gr_fb_fd = get_framebuffer(gr_framebuffer); 148 149 if(gr_fb_fd < 0) { 150 if (fd >= 0) { 151 ioctl(fd, KDSETMODE, (void*) KD_TEXT); 152 close(fd); 153 } 154 return -1; 155 } 156 157 gr_vt_fd = fd; 158 159 /* start with 0 as front (displayed) and 1 as back (drawing) */ 160 gr_active_fb = 0; 161 set_active_framebuffer(0); 162 163 return 0; 164 } 165 166 void gr_exit(void) 167 { 168 close(gr_fb_fd); 169 gr_fb_fd = -1; 170 171 if (gr_vt_fd >= 0) { 172 ioctl(gr_vt_fd, KDSETMODE, (void*) KD_TEXT); 173 close(gr_vt_fd); 174 gr_vt_fd = -1; 175 } 176 } 177 178 int gr_fb_width(void) 179 { 180 return gr_framebuffer[0].width; 181 } 182 183 int gr_fb_height(void) 184 { 185 return gr_framebuffer[0].height; 186 } 187 188 uint16_t red = 0xf800; 189 uint16_t green = 0x07e0; 190 uint16_t blue = 0x001f; 191 192 void draw_grid(int w, int h, uint16_t* loc) { 193 int i, j; 194 int v; 195 int stride = fi.line_length / (vi.bits_per_pixel >> 3); 196 197 for (j = 0; j < h/2; j++) { 198 for (i = 0; i < w/2; i++) 199 loc[i + j*(stride)] = red; 200 for (; i < w; i++) 201 loc[i + j*(stride)] = green; 202 } 203 for (; j < h; j++) { 204 for (i = 0; i < w/2; i++) 205 loc[i + j*(stride)] = blue; 206 for (; i < w; i++) 207 loc[i + j*(stride)] = 0xffff; 208 } 209 210 } 211 212 void clear_screen(int w, int h, uint16_t* loc) 213 { 214 int i,j; 215 int stride = fi.line_length / (vi.bits_per_pixel >> 3); 216 217 for (j = 0; j < h; j++) 218 for (i = 0; i < w; i++) 219 loc[i + j*(stride)] = 0x0000; 220 } 221 222 int main(int argc, char **argv) { 223 int w; 224 int h; 225 int id = 0; 226 gr_init(); 227 w = vi.xres; 228 h = vi.yres; 229 clear_screen(w, h, (uint16_t *)gr_framebuffer[0].data); 230 clear_screen(w, h, (uint16_t *)gr_framebuffer[1].data); 231 232 if (argc > 2) { 233 w = atoi(argv[1]); 234 h = atoi(argv[2]); 235 } 236 237 if (argc > 3) 238 id = !!atoi(argv[3]); 239 240 draw_grid(w, h, (uint16_t *)gr_framebuffer[id].data); 241 set_active_framebuffer(!id); 242 set_active_framebuffer(id); 243 244 return 0; 245 } 246
