1 files changed, 70 insertions, 0 deletions
diff --git a/adb/framebuffer_service.c b/adb/framebuffer_service.c
new file mode 100644
index 0000000..0de0dd5
--- /dev/null
+++ b/adb/framebuffer_service.c
@@ -0,0 +1,70 @@
+/*
+ * 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 <cutils/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);
+}
+