| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <string.h> |
| #include <fcntl.h> |
| |
| #include "fdevent.h" |
| #include "adb.h" |
| |
| #include <linux/fb.h> |
| #include <sys/ioctl.h> |
| #include <sys/mman.h> |
| |
| /* TODO: |
| ** - grab the current buffer, not the first buffer |
| ** - sync with vsync to avoid tearing |
| */ |
| |
| void framebuffer_service(int fd, void *cookie) |
| { |
| struct fb_var_screeninfo vinfo; |
| int fb; |
| void *ptr = MAP_FAILED; |
| char x; |
| |
| unsigned fbinfo[4]; |
| |
| fb = open("/dev/graphics/fb0", O_RDONLY); |
| if(fb < 0) goto done; |
| |
| if(ioctl(fb, FBIOGET_VSCREENINFO, &vinfo) < 0) goto done; |
| fcntl(fb, F_SETFD, FD_CLOEXEC); |
| |
| fbinfo[0] = 16; |
| fbinfo[1] = vinfo.xres * vinfo.yres * 2; |
| fbinfo[2] = vinfo.xres; |
| fbinfo[3] = vinfo.yres; |
| |
| ptr = mmap(0, fbinfo[1], PROT_READ, MAP_SHARED, fb, 0); |
| if(ptr == MAP_FAILED) goto done; |
| |
| if(writex(fd, fbinfo, sizeof(unsigned) * 4)) goto done; |
| |
| for(;;) { |
| if(readx(fd, &x, 1)) goto done; |
| if(writex(fd, ptr, fbinfo[1])) goto done; |
| } |
| |
| done: |
| if(ptr != MAP_FAILED) munmap(ptr, fbinfo[1]); |
| if(fb >= 0) close(fb); |
| close(fd); |
| } |
| |