Take into account the texture layer's transform for clipping

Bug #7370212

Change-Id: Ibdc3161306f54a1cfe66e08458f05ee01a13b1df

Author: Romain Guy

core/jni/android_view_GLES20Canvas.cpp

@@ -829,7 +829,6 @@ static void android_view_GLES20Canvas_clearLayerTexture(JNIEnv* env, jobject cla
 
 static void android_view_GLES20Canvas_setTextureLayerTransform(JNIEnv* env, jobject clazz,
         Layer* layer, SkMatrix* matrix) {
-
     layer->getTransform().load(*matrix);
 }
 

libs/hwui/Layer.h

@@ -209,6 +209,9 @@ struct Layer {
     }
 
     inline void allocateTexture(GLenum format, GLenum storage) {
+#if DEBUG_LAYERS
+        ALOGD("  Allocate layer: %dx%d", getWidth(), getHeight());
+#endif
         glTexImage2D(renderTarget, 0, format, getWidth(), getHeight(), 0, format, storage, NULL);
     }
 

libs/hwui/OpenGLRenderer.cpp

@@ -895,12 +895,6 @@ void OpenGLRenderer::composeLayer(sp<Snapshot> current, sp<Snapshot> previous) {
 void OpenGLRenderer::drawTextureLayer(Layer* layer, const Rect& rect) {
     float alpha = layer->getAlpha() / 255.0f;
 
-    mat4& transform = layer->getTransform();
-    if (!transform.isIdentity()) {
-        save(0);
-        mSnapshot->transform->multiply(transform);
-    }
-
     setupDraw();
     if (layer->getRenderTarget() == GL_TEXTURE_2D) {
         setupDrawWithTexture();
@@ -937,10 +931,6 @@ void OpenGLRenderer::drawTextureLayer(Layer* layer, const Rect& rect) {
     glDrawArrays(GL_TRIANGLE_STRIP, 0, gMeshCount);
 
     finishDrawTexture();
-
-    if (!transform.isIdentity()) {
-        restore();
-    }
 }
 
 void OpenGLRenderer::composeLayerRect(Layer* layer, const Rect& rect, bool swap) {
@@ -2792,12 +2782,24 @@ status_t OpenGLRenderer::drawLayer(Layer* layer, float x, float y, SkPaint* pain
         return DrawGlInfo::kStatusDone;
     }
 
+    mat4* transform = NULL;
+    if (layer->isTextureLayer()) {
+        transform = &layer->getTransform();
+        if (!transform->isIdentity()) {
+            save(0);
+            mSnapshot->transform->multiply(*transform);
+        }
+    }
+
     Rect transformed;
     Rect clip;
     const bool rejected = quickRejectNoScissor(x, y,
             x + layer->layer.getWidth(), y + layer->layer.getHeight(), transformed, clip);
 
     if (rejected) {
+        if (transform && !transform->isIdentity()) {
+            restore();
+        }
         return DrawGlInfo::kStatusDone;
     }
 
@@ -2858,6 +2860,10 @@ status_t OpenGLRenderer::drawLayer(Layer* layer, float x, float y, SkPaint* pain
         }
     }
 
+    if (transform && !transform->isIdentity()) {
+        restore();
+    }
+
     return DrawGlInfo::kStatusDrew;
 }