Plugin API to allow for y-axis inversion during rendering.

bug: 3393314
Change-Id: I913a6c073fe9ba56c14cdbcaa523b6e5a5af5219

2 files changed, 12 insertions, 0 deletions

diff --git a/WebCore/platform/graphics/android/MediaLayer.cpp b/WebCore/platform/graphics/android/MediaLayer.cpp
index 9c370a5..e4ccbdb 100644
--- a/WebCore/platform/graphics/android/MediaLayer.cpp
+++ b/WebCore/platform/graphics/android/MediaLayer.cpp
@@ -46,6 +46,7 @@ MediaLayer::MediaLayer() : LayerAndroid(false)
     m_bufferedTexture = new MediaTexture(EGL_NO_CONTEXT);
     m_bufferedTexture->incStrong(this);
     m_currentTextureInfo = 0;
+    m_isContentInverted = false;
     XLOG("Creating Media Layer %p", this);
 }
 
@@ -54,6 +55,7 @@ MediaLayer::MediaLayer(const MediaLayer& layer) : LayerAndroid(layer)
     m_bufferedTexture = layer.getTexture();
     m_bufferedTexture->incStrong(this);
     m_currentTextureInfo = 0;
+    m_isContentInverted = layer.m_isContentInverted;
     XLOG("Creating Media Layer Copy %p -> %p", &layer, this);
 }
 
@@ -71,6 +73,14 @@ bool MediaLayer::drawGL(SkMatrix& matrix)
             SkRect rect;
             rect.set(0, 0, getSize().width(), getSize().height());
             TransformationMatrix m = drawTransform();
+
+            // the layer's shader draws the content inverted so we must undo
+            // that change in the transformation matrix
+            if (!m_isContentInverted) {
+                m.flipY();
+                m.translate(0, -getSize().height());
+            }
+
             TilesManager::instance()->shader()->drawLayerQuad(m, rect,
                                                               textureInfo->m_textureId,
                                                               1.0f); //TODO fix this m_drawOpacity
diff --git a/WebCore/platform/graphics/android/MediaLayer.h b/WebCore/platform/graphics/android/MediaLayer.h
index eb56440..1944512 100644
--- a/WebCore/platform/graphics/android/MediaLayer.h
+++ b/WebCore/platform/graphics/android/MediaLayer.h
@@ -54,6 +54,7 @@ public:
     void setCurrentTextureInfo(TextureInfo* info) { m_currentTextureInfo = info; }
     TextureInfo* getCurrentTextureInfo() const { return m_currentTextureInfo; }
 
+    void invertContents(bool invertContent) { m_isContentInverted = invertContent; }
 
 private:
 
@@ -62,6 +63,7 @@ private:
 
     TextureInfo* m_currentTextureInfo;
 
+    bool m_isContentInverted;
 };
 
 } // namespace WebCore