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Commit 4c7cc341 authored by Dianne Hackborn's avatar Dianne Hackborn
Browse files

Demo hack! 

To make a 800 tall screen run like a 720:

adb shell setprop persist.demo.screensizehack 800=720

Note this is a persistent property, so it will (intentionally) remain across boots.

Change-Id: I8a8a9f937399327444e8fb154b91f0e642db116e
parent fb1b2317

core/java/android/view/Display.java

+5 −0
Original line number Diff line number Diff line
@@ -136,6 +136,11 @@ public class Display 
        outMetrics.ydpi         = mDpiY;

    }



    /**

     * @hide Helper for our fake display size hack.

     */

    native public static int unmapDisplaySize(int newSize);

    

    /*

     * We use a class initializer to allow the native code to cache some

     * field offsets.

core/jni/android_view_Display.cpp

+30 −3
Original line number Diff line number Diff line
@@ -17,6 +17,8 @@ 
#include <stdio.h>

#include <assert.h>



#include <cutils/properties.h>



#include <surfaceflinger/SurfaceComposerClient.h>

#include <ui/PixelFormat.h>

#include <ui/DisplayInfo.h>
@@ -24,6 +26,7 @@ 
#include "jni.h"

#include <android_runtime/AndroidRuntime.h>

#include <utils/misc.h>

#include <utils/Log.h>



// ----------------------------------------------------------------------------
@@ -41,6 +44,9 @@ struct offsets_t { 
};

static offsets_t offsets;



static int gOldSize = -1;

static int gNewSize = -1;



static void doThrow(JNIEnv* env, const char* exc, const char* msg = NULL)

{

    jclass npeClazz = env->FindClass(exc);
@@ -69,14 +75,16 @@ static jint android_view_Display_getWidth( 
        JNIEnv* env, jobject clazz)

{

    DisplayID dpy = env->GetIntField(clazz, offsets.display);

    return SurfaceComposerClient::getDisplayWidth(dpy);

    jint w = SurfaceComposerClient::getDisplayWidth(dpy);

    return w == gOldSize ? gNewSize : w;

}



static jint android_view_Display_getHeight(

        JNIEnv* env, jobject clazz)

{

    DisplayID dpy = env->GetIntField(clazz, offsets.display);

    return SurfaceComposerClient::getDisplayHeight(dpy);

    int h = SurfaceComposerClient::getDisplayHeight(dpy);

    return h == gOldSize ? gNewSize : h;

}



static jint android_view_Display_getOrientation(
@@ -92,6 +100,13 @@ static jint android_view_Display_getDisplayCount( 
    return SurfaceComposerClient::getNumberOfDisplays();

}



static jint android_view_Display_unmapDisplaySize(

        JNIEnv* env, jclass clazz, jint newSize)

{

    if (newSize == gNewSize) return gOldSize;

    return newSize;

}



// ----------------------------------------------------------------------------



const char* const kClassPathName = "android/view/Display";
@@ -110,7 +125,9 @@ static JNINativeMethod gMethods[] = { 
    {   "getHeight", "()I",

            (void*)android_view_Display_getHeight },

    {   "getOrientation", "()I",

            (void*)android_view_Display_getOrientation }

            (void*)android_view_Display_getOrientation },

    {   "unmapDisplaySize", "(I)I",

            (void*)android_view_Display_unmapDisplaySize }

};



void nativeClassInit(JNIEnv* env, jclass clazz)
@@ -125,6 +142,16 @@ void nativeClassInit(JNIEnv* env, jclass clazz) 


int register_android_view_Display(JNIEnv* env)

{

    char buf[PROPERTY_VALUE_MAX];

    int len = property_get("persist.demo.screensizehack", buf, "");

    if (len > 0) {

        int temp1, temp2;

        if (sscanf(buf, "%d=%d", &temp1, &temp2) == 2) {

            gOldSize = temp1;

            gNewSize = temp2;

        }

    }



    return AndroidRuntime::registerNativeMethods(env,

            kClassPathName, gMethods, NELEM(gMethods));

}

services/java/com/android/server/WindowManagerService.java

+2 −1
Original line number Diff line number Diff line
@@ -6239,7 +6239,8 @@ public class WindowManagerService extends IWindowManager.Stub 
            mDisplay = wm.getDefaultDisplay();

            mInitialDisplayWidth = mDisplay.getWidth();

            mInitialDisplayHeight = mDisplay.getHeight();

            mInputManager.setDisplaySize(0, mInitialDisplayWidth, mInitialDisplayHeight);

            mInputManager.setDisplaySize(0, Display.unmapDisplaySize(mInitialDisplayWidth),

                    Display.unmapDisplaySize(mInitialDisplayHeight));

        }



        try {