Support transform'd GraphicBuffers

Bug: 28428955
Change-Id: I23e2fc9b96a67c7cfda42d9d7319e478194a7fa7

libs/hwui/GlopBuilder.cpp

@@ -471,18 +471,19 @@ GlopBuilder& GlopBuilder::setFillTextureLayer(Layer& layer, float alpha) {
     return *this;
 }
 
-GlopBuilder& GlopBuilder::setFillExternalTexture(Texture& texture) {
+GlopBuilder& GlopBuilder::setFillExternalTexture(Texture& texture, Matrix4& textureTransform) {
     TRIGGER_STAGE(kFillStage);
     REQUIRE_STAGES(kMeshStage | kRoundRectClipStage);
 
     mOutGlop->fill.texture = { &texture,
             GL_TEXTURE_EXTERNAL_OES, GL_LINEAR, GL_CLAMP_TO_EDGE,
-            nullptr };
+            &textureTransform };
 
     setFill(SK_ColorWHITE, 1.0f, SkXfermode::kSrc_Mode, Blend::ModeOrderSwap::NoSwap,
             nullptr, nullptr);
 
     mDescription.modulate = mOutGlop->fill.color.a < 1.0f;
+    mDescription.hasTextureTransform = true;
     return *this;
 }
 

libs/hwui/GlopBuilder.h

@@ -73,7 +73,7 @@ public:
     // TODO: Texture should probably know and own its target.
     // setFillLayer() forces it to GL_TEXTURE which isn't always correct.
     // Similarly setFillLayer normally forces its own wrap & filter mode
-    GlopBuilder& setFillExternalTexture(Texture& texture);
+    GlopBuilder& setFillExternalTexture(Texture& texture, Matrix4& textureTransform);
 
     GlopBuilder& setTransform(const Snapshot& snapshot, const int transformFlags) {
         return setTransform(*snapshot.transform, transformFlags);

libs/hwui/Matrix.h

@@ -236,6 +236,8 @@ public:
 
     static const Matrix4& identity();
 
+    void invalidateType() { mType = kTypeUnknown; }
+
 private:
     mutable uint8_t mType;
 

libs/hwui/Readback.cpp

@@ -101,7 +101,10 @@ CopyResult Readback::copySurfaceInto(renderthread::RenderThread& renderThread,
     // Setup the source
     sp<GraphicBuffer> sourceBuffer;
     sp<Fence> sourceFence;
-    status_t err = surface.getLastQueuedBuffer(&sourceBuffer, &sourceFence);
+    Matrix4 texTransform;
+    status_t err = surface.getLastQueuedBuffer(&sourceBuffer, &sourceFence,
+            texTransform.data);
+    texTransform.invalidateType();
     if (err != NO_ERROR) {
         ALOGW("Failed to get last queued buffer, error = %d", err);
         return CopyResult::UnknownError;
@@ -163,8 +166,8 @@ CopyResult Readback::copySurfaceInto(renderthread::RenderThread& renderThread,
         Glop glop;
         GlopBuilder(renderState, caches, &glop)
                 .setRoundRectClipState(nullptr)
-                .setMeshTexturedUvQuad(nullptr, Rect(0, 1, 1, 0)) // TODO: simplify with VBO
-                .setFillExternalTexture(sourceTexture)
+                .setMeshTexturedUnitQuad(nullptr)
+                .setFillExternalTexture(sourceTexture, texTransform)
                 .setTransform(Matrix4::identity(), TransformFlags::None)
                 .setModelViewMapUnitToRect(destRect)
                 .build();

tests/HwAccelerationTest/src/com/android/test/hwui/GetBitmapSurfaceViewActivity.java

@@ -23,6 +23,7 @@ import android.os.Bundle;
 import android.os.Environment;
 import android.view.Gravity;
 import android.view.PixelCopy;
+import android.view.Surface;
 import android.view.SurfaceHolder;
 import android.view.SurfaceView;
 import android.view.View;
@@ -87,9 +88,42 @@ public class GetBitmapSurfaceViewActivity extends Activity implements SurfaceHol
             android.util.Log.e("TextureView", "Cannot set preview texture target!", t);
         }
 
+        setCameraDisplayOrientation(this, 0, mCamera);
         mCamera.startPreview();
     }
 
+    public static void setCameraDisplayOrientation(Activity activity,
+            int cameraId, android.hardware.Camera camera) {
+        android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
+        android.hardware.Camera.getCameraInfo(cameraId, info);
+        int rotation = activity.getWindowManager().getDefaultDisplay()
+                .getRotation();
+        int degrees = 0;
+        switch (rotation) {
+            case Surface.ROTATION_0:
+                degrees = 0;
+                break;
+            case Surface.ROTATION_90:
+                degrees = 90;
+                break;
+            case Surface.ROTATION_180:
+                degrees = 180;
+                break;
+            case Surface.ROTATION_270:
+                degrees = 270;
+                break;
+        }
+
+        int result;
+        if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
+            result = (info.orientation + degrees) % 360;
+            result = (360 - result) % 360; // compensate the mirror
+        } else { // back-facing
+            result = (info.orientation - degrees + 360) % 360;
+        }
+        camera.setDisplayOrientation(result);
+    }
+
     @Override
     public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
     }