113 lines
3 KiB
C
113 lines
3 KiB
C
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <fcntl.h>
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#include "fdevent.h"
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#include "adb.h"
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#include <linux/fb.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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/* TODO:
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** - sync with vsync to avoid tearing
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*/
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/* This version number defines the format of the fbinfo struct.
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It must match versioning in ddms where this data is consumed. */
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#define DDMS_RAWIMAGE_VERSION 1
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struct fbinfo {
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unsigned int version;
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unsigned int bpp;
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unsigned int size;
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unsigned int width;
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unsigned int height;
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unsigned int red_offset;
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unsigned int red_length;
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unsigned int blue_offset;
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unsigned int blue_length;
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unsigned int green_offset;
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unsigned int green_length;
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unsigned int alpha_offset;
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unsigned int alpha_length;
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} __attribute__((packed));
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void framebuffer_service(int fd, void *cookie)
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{
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struct fbinfo fbinfo;
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unsigned int i;
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char buf[640];
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int fd_screencap;
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int w, h, f;
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int fds[2];
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if (pipe(fds) < 0) goto done;
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pid_t pid = fork();
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if (pid < 0) goto done;
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if (pid == 0) {
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dup2(fds[1], STDOUT_FILENO);
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close(fds[0]);
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close(fds[1]);
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const char* command = "screencap";
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const char *args[2] = {command, NULL};
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execvp(command, (char**)args);
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exit(1);
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}
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fd_screencap = fds[0];
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/* read w, h & format */
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if(readx(fd_screencap, &w, 4)) goto done;
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if(readx(fd_screencap, &h, 4)) goto done;
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if(readx(fd_screencap, &f, 4)) goto done;
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/* for now always assume RGBX_8888 format */
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fbinfo.version = DDMS_RAWIMAGE_VERSION;
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fbinfo.bpp = 32;
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fbinfo.size = w * h * 4;
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fbinfo.width = w;
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fbinfo.height = h;
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fbinfo.red_offset = 0;
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fbinfo.red_length = 8;
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fbinfo.green_offset = 8;
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fbinfo.green_length = 8;
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fbinfo.blue_offset = 16;
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fbinfo.blue_length = 8;
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fbinfo.alpha_offset = 24;
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fbinfo.alpha_length = 8;
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/* write header */
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if(writex(fd, &fbinfo, sizeof(fbinfo))) goto done;
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/* write data */
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for(i = 0; i < fbinfo.size; i += sizeof(buf)) {
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if(readx(fd_screencap, buf, sizeof(buf))) goto done;
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if(writex(fd, buf, sizeof(buf))) goto done;
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}
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if(readx(fd_screencap, buf, fbinfo.size % sizeof(buf))) goto done;
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if(writex(fd, buf, fbinfo.size % sizeof(buf))) goto done;
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done:
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close(fds[0]);
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close(fds[1]);
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close(fd);
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}
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