refactored screenshot code

the core screenshot function now can capture the screen at any lower resolution
performing bilinear filtering.

we also now have some client code to interface with the screenshot service.

it's now possible to request a screenshot at a lower resolution.

Change-Id: I33689bba98507ab928d0898b21596d0d2fe4b953

1 files changed, 7 insertions, 18 deletions

diff --git a/cmds/screencap/screencap.cpp b/cmds/screencap/screencap.cpp
index 6ce5b86..bc5e10d 100644
--- a/cmds/screencap/screencap.cpp
+++ b/cmds/screencap/screencap.cpp
@@ -17,32 +17,21 @@
 #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>
+#include <surfaceflinger/SurfaceComposerClient.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)
+    ScreenshotClient screenshot;
+    if (screenshot.update() != NO_ERROR)
         return 0;
 
-    uint8_t* base = (uint8_t*)heap->getBase();
+    void const* base = screenshot.getPixels();
+    uint32_t w = screenshot.getWidth();
+    uint32_t h = screenshot.getHeight();
+    uint32_t f = screenshot.getFormat();
     int fd = dup(STDOUT_FILENO);
     write(fd, &w, 4);
     write(fd, &h, 4);