diff options
Diffstat (limited to 'adb/framebuffer_service.cpp')
| -rw-r--r-- | adb/framebuffer_service.cpp | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/adb/framebuffer_service.cpp b/adb/framebuffer_service.cpp new file mode 100644 index 0000000..7baad8b --- /dev/null +++ b/adb/framebuffer_service.cpp @@ -0,0 +1,185 @@ +/* + * 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 <errno.h> +#include <fcntl.h> +#include <linux/fb.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/ioctl.h> +#include <sys/mman.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <unistd.h> + +#include "sysdeps.h" + +#include "adb.h" +#include "adb_io.h" +#include "fdevent.h" + +/* TODO: +** - sync with vsync to avoid tearing +*/ +/* This version number defines the format of the fbinfo struct. + It must match versioning in ddms where this data is consumed. */ +#define DDMS_RAWIMAGE_VERSION 1 +struct fbinfo { + unsigned int version; + unsigned int bpp; + unsigned int size; + unsigned int width; + unsigned int height; + unsigned int red_offset; + unsigned int red_length; + unsigned int blue_offset; + unsigned int blue_length; + unsigned int green_offset; + unsigned int green_length; + unsigned int alpha_offset; + unsigned int alpha_length; +} __attribute__((packed)); + +void framebuffer_service(int fd, void *cookie) +{ + struct fbinfo fbinfo; + unsigned int i, bsize; + char buf[640]; + int fd_screencap; + int w, h, f; + int fds[2]; + pid_t pid; + + if (pipe2(fds, O_CLOEXEC) < 0) goto pipefail; + + pid = fork(); + if (pid < 0) goto done; + + if (pid == 0) { + dup2(fds[1], STDOUT_FILENO); + adb_close(fds[0]); + adb_close(fds[1]); + const char* command = "screencap"; + const char *args[2] = {command, NULL}; + execvp(command, (char**)args); + exit(1); + } + + adb_close(fds[1]); + fd_screencap = fds[0]; + + /* read w, h & format */ + if(!ReadFdExactly(fd_screencap, &w, 4)) goto done; + if(!ReadFdExactly(fd_screencap, &h, 4)) goto done; + if(!ReadFdExactly(fd_screencap, &f, 4)) goto done; + + fbinfo.version = DDMS_RAWIMAGE_VERSION; + /* see hardware/hardware.h */ + switch (f) { + case 1: /* RGBA_8888 */ + fbinfo.bpp = 32; + fbinfo.size = w * h * 4; + fbinfo.width = w; + fbinfo.height = h; + fbinfo.red_offset = 0; + fbinfo.red_length = 8; + fbinfo.green_offset = 8; + fbinfo.green_length = 8; + fbinfo.blue_offset = 16; + fbinfo.blue_length = 8; + fbinfo.alpha_offset = 24; + fbinfo.alpha_length = 8; + break; + case 2: /* RGBX_8888 */ + fbinfo.bpp = 32; + fbinfo.size = w * h * 4; + fbinfo.width = w; + fbinfo.height = h; + fbinfo.red_offset = 0; + fbinfo.red_length = 8; + fbinfo.green_offset = 8; + fbinfo.green_length = 8; + fbinfo.blue_offset = 16; + fbinfo.blue_length = 8; + fbinfo.alpha_offset = 24; + fbinfo.alpha_length = 0; + break; + case 3: /* RGB_888 */ + fbinfo.bpp = 24; + fbinfo.size = w * h * 3; + fbinfo.width = w; + fbinfo.height = h; + fbinfo.red_offset = 0; + fbinfo.red_length = 8; + fbinfo.green_offset = 8; + fbinfo.green_length = 8; + fbinfo.blue_offset = 16; + fbinfo.blue_length = 8; + fbinfo.alpha_offset = 24; + fbinfo.alpha_length = 0; + break; + case 4: /* RGB_565 */ + fbinfo.bpp = 16; + fbinfo.size = w * h * 2; + fbinfo.width = w; + fbinfo.height = h; + fbinfo.red_offset = 11; + fbinfo.red_length = 5; + fbinfo.green_offset = 5; + fbinfo.green_length = 6; + fbinfo.blue_offset = 0; + fbinfo.blue_length = 5; + fbinfo.alpha_offset = 0; + fbinfo.alpha_length = 0; + break; + case 5: /* BGRA_8888 */ + fbinfo.bpp = 32; + fbinfo.size = w * h * 4; + fbinfo.width = w; + fbinfo.height = h; + fbinfo.red_offset = 16; + fbinfo.red_length = 8; + fbinfo.green_offset = 8; + fbinfo.green_length = 8; + fbinfo.blue_offset = 0; + fbinfo.blue_length = 8; + fbinfo.alpha_offset = 24; + fbinfo.alpha_length = 8; + break; + default: + goto done; + } + + /* write header */ + if(!WriteFdExactly(fd, &fbinfo, sizeof(fbinfo))) goto done; + + /* write data */ + for(i = 0; i < fbinfo.size; i += bsize) { + bsize = sizeof(buf); + if (i + bsize > fbinfo.size) + bsize = fbinfo.size - i; + if(!ReadFdExactly(fd_screencap, buf, bsize)) goto done; + if(!WriteFdExactly(fd, buf, bsize)) goto done; + } + +done: + adb_close(fds[0]); + + TEMP_FAILURE_RETRY(waitpid(pid, NULL, 0)); +pipefail: + adb_close(fd); +} |