new screencap command

this captures the framebuffer via surfaceflinger APIs and outputs
it to stdout. this is intended to be used by adbd.

Change-Id: I0cfa6a47ec121edcd93f46b64870f9a553f653ff

2 files changed, 71 insertions, 0 deletions

diff --git a/cmds/screencap/Android.mk b/cmds/screencap/Android.mk
new file mode 100644
index 0000000..1a6e23e
--- /dev/null
+++ b/cmds/screencap/Android.mk
@@ -0,0 +1,18 @@
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES:= \
+	screencap.cpp
+
+LOCAL_SHARED_LIBRARIES := \
+	libcutils \
+	libutils \
+	libbinder \
+    libui \
+    libsurfaceflinger_client
+
+LOCAL_MODULE:= screencap
+
+LOCAL_MODULE_TAGS := optional
+
+include $(BUILD_EXECUTABLE)
diff --git a/cmds/screencap/screencap.cpp b/cmds/screencap/screencap.cpp
new file mode 100644
index 0000000..6ce5b86
--- /dev/null
+++ b/cmds/screencap/screencap.cpp
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2010 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 <unistd.h>
+#include <fcntl.h>
+
+#include <utils/Log.h>
+
+#include <binder/IPCThreadState.h>
+#include <binder/ProcessState.h>
+#include <binder/IServiceManager.h>
+
+#include <binder/IMemory.h>
+#include <surfaceflinger/ISurfaceComposer.h>
+
+using namespace android;
+
+int main(int argc, char** argv)
+{
+    const String16 name("SurfaceFlinger");
+    sp<ISurfaceComposer> composer;
+    if (getService(name, &composer) != NO_ERROR)
+        return 0;
+
+    sp<IMemoryHeap> heap;
+    uint32_t w, h;
+    PixelFormat f;
+    status_t err = composer->captureScreen(0, &heap, &w, &h, &f);
+    if (err != NO_ERROR)
+        return 0;
+
+    uint8_t* base = (uint8_t*)heap->getBase();
+    int fd = dup(STDOUT_FILENO);
+    write(fd, &w, 4);
+    write(fd, &h, 4);
+    write(fd, &f, 4);
+    write(fd, base, w*h*4);
+    close(fd);
+    return 0;
+}