Add set_scaling_mode() to ANativeWindow.

This allows to specify the scaling mode independently from
the buffer size.

Change-Id: Iaa2baa660445531a97d3fac192e580f4929c5d3b

include/gui/ISurfaceTexture.h

@@ -87,6 +87,7 @@ protected:
 
     virtual status_t setCrop(const Rect& reg) = 0;
     virtual status_t setTransform(uint32_t transform) = 0;
+    virtual status_t setScalingMode(int mode) = 0;
 
     // getAllocator retrieves the binder object that must be referenced as long
     // as the GraphicBuffers dequeued from this ISurfaceTexture are referenced.

include/gui/SurfaceTexture.h

@@ -88,6 +88,7 @@ public:
     virtual void cancelBuffer(int buf);
     virtual status_t setCrop(const Rect& reg);
     virtual status_t setTransform(uint32_t transform);
+    virtual status_t setScalingMode(int mode);
 
     virtual int query(int what, int* value);
 
@@ -185,6 +186,9 @@ public:
     // getCurrentTransform returns the transform of the current buffer
     uint32_t getCurrentTransform() const;
 
+    // getCurrentScalingMode returns the scaling mode of the current buffer
+    uint32_t getCurrentScalingMode() const;
+
     // dump our state in a String
     void dump(String8& result) const;
     void dump(String8& result, const char* prefix, char* buffer, size_t SIZE) const;
@@ -220,6 +224,7 @@ private:
               mBufferState(BufferSlot::FREE),
               mRequestBufferCalled(false),
               mTransform(0),
+              mScalingMode(NATIVE_WINDOW_SCALING_MODE_FREEZE),
               mTimestamp(0) {
             mCrop.makeInvalid();
         }
@@ -281,6 +286,11 @@ private:
         // slot.
         uint32_t mTransform;
 
+        // mScalingMode is the current scaling mode for this buffer slot. This
+        // gets set to mNextScalingMode each time queueBuffer gets called for
+        // this slot.
+        uint32_t mScalingMode;
+
         // mTimestamp is the current timestamp for this buffer slot. This gets
         // to set by queueBuffer each time this slot is queued.
         int64_t mTimestamp;
@@ -337,20 +347,24 @@ private:
     sp<GraphicBuffer> mCurrentTextureBuf;
 
     // mCurrentCrop is the crop rectangle that applies to the current texture.
-    // It gets set to mLastQueuedCrop each time updateTexImage is called.
+    // It gets set each time updateTexImage is called.
     Rect mCurrentCrop;
 
     // mCurrentTransform is the transform identifier for the current texture. It
-    // gets set to mLastQueuedTransform each time updateTexImage is called.
+    // gets set each time updateTexImage is called.
     uint32_t mCurrentTransform;
 
+    // mCurrentScalingMode is the scaling mode for the current texture. It gets
+    // set to each time updateTexImage is called.
+    uint32_t mCurrentScalingMode;
+
     // mCurrentTransformMatrix is the transform matrix for the current texture.
     // It gets computed by computeTransformMatrix each time updateTexImage is
     // called.
     float mCurrentTransformMatrix[16];
 
     // mCurrentTimestamp is the timestamp for the current texture. It
-    // gets set to mLastQueuedTimestamp each time updateTexImage is called.
+    // gets set each time updateTexImage is called.
     int64_t mCurrentTimestamp;
 
     // mNextCrop is the crop rectangle that will be used for the next buffer
@@ -361,6 +375,10 @@ private:
     // buffer that gets queued. It is set by calling setTransform.
     uint32_t mNextTransform;
 
+    // mNextScalingMode is the scaling mode that will be used for the next
+    // buffers that get queued. It is set by calling setScalingMode.
+    int mNextScalingMode;
+
     // mTexName is the name of the OpenGL texture to which streamed images will
     // be bound when updateTexImage is called. It is set at construction time
     // changed with a call to setTexName.

include/gui/SurfaceTextureClient.h

@@ -63,6 +63,7 @@ private:
     int dispatchSetBuffersGeometry(va_list args);
     int dispatchSetBuffersDimensions(va_list args);
     int dispatchSetBuffersFormat(va_list args);
+    int dispatchSetScalingMode(va_list args);
     int dispatchSetBuffersTransform(va_list args);
     int dispatchSetBuffersTimestamp(va_list args);
     int dispatchSetCrop(va_list args);
@@ -84,6 +85,7 @@ protected:
     virtual int setBufferCount(int bufferCount);
     virtual int setBuffersDimensions(int w, int h);
     virtual int setBuffersFormat(int format);
+    virtual int setScalingMode(int mode);
     virtual int setBuffersTransform(int transform);
     virtual int setBuffersTimestamp(int64_t timestamp);
     virtual int setCrop(Rect const* rect);

libs/gui/ISurfaceTexture.cpp

@@ -43,6 +43,7 @@ enum {
     SET_SYNCHRONOUS_MODE,
     CONNECT,
     DISCONNECT,
+    SET_SCALING_MODE,
 };
 
 
@@ -130,6 +131,15 @@ public:
         return result;
     }
 
+    virtual status_t setScalingMode(int mode) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
+        data.writeInt32(mode);
+        remote()->transact(SET_SCALING_MODE, data, &reply);
+        status_t result = reply.readInt32();
+        return result;
+    }
+
     virtual sp<IBinder> getAllocator() {
         Parcel data, reply;
         data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
@@ -244,6 +254,13 @@ status_t BnSurfaceTexture::onTransact(
             reply->writeInt32(result);
             return NO_ERROR;
         } break;
+        case SET_SCALING_MODE: {
+            CHECK_INTERFACE(ISurfaceTexture, data, reply);
+            int mode = data.readInt32();
+            status_t result = setScalingMode(mode);
+            reply->writeInt32(result);
+            return NO_ERROR;
+        } break;
         case GET_ALLOCATOR: {
             CHECK_INTERFACE(ISurfaceTexture, data, reply);
             sp<IBinder> result = getAllocator();

libs/gui/SurfaceTexture.cpp

@@ -90,6 +90,7 @@ SurfaceTexture::SurfaceTexture(GLuint tex, bool allowSynchronousMode) :
     mCurrentTransform(0),
     mCurrentTimestamp(0),
     mNextTransform(0),
+    mNextScalingMode(NATIVE_WINDOW_SCALING_MODE_FREEZE),
     mTexName(tex),
     mSynchronousMode(false),
     mAllowSynchronousMode(allowSynchronousMode),
@@ -453,6 +454,7 @@ status_t SurfaceTexture::queueBuffer(int buf, int64_t timestamp) {
         mSlots[buf].mBufferState = BufferSlot::QUEUED;
         mSlots[buf].mCrop = mNextCrop;
         mSlots[buf].mTransform = mNextTransform;
+        mSlots[buf].mScalingMode = mNextScalingMode;
         mSlots[buf].mTimestamp = timestamp;
         mDequeueCondition.signal();
     } // scope for the lock
@@ -542,6 +544,22 @@ status_t SurfaceTexture::disconnect(int api) {
     return err;
 }
 
+status_t SurfaceTexture::setScalingMode(int mode) {
+    LOGV("SurfaceTexture::setScalingMode");
+
+    switch (mode) {
+        case NATIVE_WINDOW_SCALING_MODE_FREEZE:
+        case NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW:
+            break;
+        default:
+            return BAD_VALUE;
+    }
+
+    Mutex::Autolock lock(mMutex);
+    mNextScalingMode = mode;
+    return OK;
+}
+
 status_t SurfaceTexture::updateTexImage() {
     LOGV("SurfaceTexture::updateTexImage");
     Mutex::Autolock lock(mMutex);
@@ -602,6 +620,7 @@ status_t SurfaceTexture::updateTexImage() {
         mCurrentTextureBuf = mSlots[buf].mGraphicBuffer;
         mCurrentCrop = mSlots[buf].mCrop;
         mCurrentTransform = mSlots[buf].mTransform;
+        mCurrentScalingMode = mSlots[buf].mScalingMode;
         mCurrentTimestamp = mSlots[buf].mTimestamp;
         computeCurrentTransformMatrix();
 
@@ -809,6 +828,11 @@ uint32_t SurfaceTexture::getCurrentTransform() const {
     return mCurrentTransform;
 }
 
+uint32_t SurfaceTexture::getCurrentScalingMode() const {
+    Mutex::Autolock lock(mMutex);
+    return mCurrentScalingMode;
+}
+
 int SurfaceTexture::query(int what, int* outValue)
 {
     Mutex::Autolock lock(mMutex);

libs/gui/SurfaceTextureClient.cpp

@@ -286,6 +286,9 @@ int SurfaceTextureClient::perform(int operation, va_list args)
     case NATIVE_WINDOW_UNLOCK_AND_POST:
         res = dispatchUnlockAndPost(args);
         break;
+    case NATIVE_WINDOW_SET_SCALING_MODE:
+        res = dispatchSetScalingMode(args);
+        break;
     default:
         res = NAME_NOT_FOUND;
         break;
@@ -340,6 +343,11 @@ int SurfaceTextureClient::dispatchSetBuffersFormat(va_list args) {
     return setBuffersFormat(f);
 }
 
+int SurfaceTextureClient::dispatchSetScalingMode(va_list args) {
+    int m = va_arg(args, int);
+    return setScalingMode(m);
+}
+
 int SurfaceTextureClient::dispatchSetBuffersTransform(va_list args) {
     int transform = va_arg(args, int);
     return setBuffersTransform(transform);
@@ -456,6 +464,18 @@ int SurfaceTextureClient::setBuffersFormat(int format)
     return NO_ERROR;
 }
 
+int SurfaceTextureClient::setScalingMode(int mode)
+{
+    LOGV("SurfaceTextureClient::setScalingMode");
+    Mutex::Autolock lock(mMutex);
+    // mode is validated on the server
+    status_t err = mSurfaceTexture->setScalingMode(mode);
+    LOGE_IF(err, "ISurfaceTexture::setScalingMode(%d) returned %s",
+            mode, strerror(-err));
+
+    return err;
+}
+
 int SurfaceTextureClient::setBuffersTransform(int transform)
 {
     LOGV("SurfaceTextureClient::setBuffersTransform");

libs/ui/FramebufferNativeWindow.cpp

@@ -299,18 +299,38 @@ int FramebufferNativeWindow::perform(ANativeWindow* window,
 {
     switch (operation) {
         case NATIVE_WINDOW_SET_USAGE:
-        case NATIVE_WINDOW_SET_BUFFERS_FORMAT:
+            // TODO: we should implement this
+            return NO_ERROR;
         case NATIVE_WINDOW_CONNECT:
+            // TODO: we should implement this
+            return NO_ERROR;
         case NATIVE_WINDOW_DISCONNECT:
-            break;
+            // TODO: we should implement this
+            return NO_ERROR;
         case NATIVE_WINDOW_LOCK:
             return INVALID_OPERATION;
         case NATIVE_WINDOW_UNLOCK_AND_POST:
             return INVALID_OPERATION;
-        default:
+        case NATIVE_WINDOW_SET_CROP:
-            return NAME_NOT_FOUND;
+            return INVALID_OPERATION;
-    }
+        case NATIVE_WINDOW_SET_BUFFER_COUNT:
+            // TODO: we should implement this
+            return INVALID_OPERATION;
+        case NATIVE_WINDOW_SET_BUFFERS_GEOMETRY:
+            return INVALID_OPERATION;
+        case NATIVE_WINDOW_SET_BUFFERS_TRANSFORM:
+            return INVALID_OPERATION;
+        case NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP:
+            return INVALID_OPERATION;
+        case NATIVE_WINDOW_SET_BUFFERS_DIMENSIONS:
+            return INVALID_OPERATION;
+        case NATIVE_WINDOW_SET_BUFFERS_FORMAT:
+            // TODO: we should implement this
             return NO_ERROR;
+        case NATIVE_WINDOW_SET_SCALING_MODE:
+            return INVALID_OPERATION;
+    }
+    return NAME_NOT_FOUND;
 }
 
 // ----------------------------------------------------------------------------