Revert "Simplify projection matrix management."

This reverts commit 0efaa71d5414287ed4beac0a88cf76f7e33a1e74.

5 files changed, 27 insertions, 19 deletions

diff --git a/libs/hwui/DisplayListRenderer.cpp b/libs/hwui/DisplayListRenderer.cpp
index a4bce3a..2391e80 100644
--- a/libs/hwui/DisplayListRenderer.cpp
+++ b/libs/hwui/DisplayListRenderer.cpp
@@ -57,6 +57,9 @@ DisplayListData* DisplayListRenderer::finishRecording() {
 }
 
 void DisplayListRenderer::setViewport(int width, int height) {
+    // TODO: DisplayListRenderer shouldn't have a projection matrix, as it should never be used
+    mProjectionMatrix.loadOrtho(0, width, height, 0, -1, 1);
+
     initializeViewport(width, height);
 }
 
diff --git a/libs/hwui/OpenGLRenderer.cpp b/libs/hwui/OpenGLRenderer.cpp
index 091cdf4..20b038d 100644
--- a/libs/hwui/OpenGLRenderer.cpp
+++ b/libs/hwui/OpenGLRenderer.cpp
@@ -171,7 +171,7 @@ void OpenGLRenderer::setViewport(int width, int height) {
 }
 
 void OpenGLRenderer::initViewport(int width, int height) {
-    mSnapshot->orthoMatrix.loadOrtho(0, width, height, 0, -1, 1);
+    mProjectionMatrix.loadOrtho(0, width, height, 0, -1, 1);
 
     initializeViewport(width, height);
 }
@@ -621,13 +621,14 @@ void OpenGLRenderer::flushLayerUpdates() {
 ///////////////////////////////////////////////////////////////////////////////
 
 void OpenGLRenderer::onSnapshotRestored(const Snapshot& removed, const Snapshot& restored) {
-    bool restoreViewport = removed.flags & Snapshot::kFlagIsFboLayer;
+    bool restoreOrtho = removed.flags & Snapshot::kFlagDirtyOrtho;
     bool restoreClip = removed.flags & Snapshot::kFlagClipSet;
     bool restoreLayer = removed.flags & Snapshot::kFlagIsLayer;
 
-    if (restoreViewport) {
+    if (restoreOrtho) {
         const Rect& r = restored.viewport;
         glViewport(r.left, r.top, r.right, r.bottom);
+        mProjectionMatrix.load(removed.orthoMatrix); // TODO: should ortho be stored in 'restored'?
     }
 
     if (restoreClip) {
@@ -846,12 +847,14 @@ bool OpenGLRenderer::createFboLayer(Layer* layer, Rect& bounds, Rect& clip) {
     layer->setFbo(mCaches.fboCache.get());
 
     mSnapshot->region = &mSnapshot->layer->region;
-    mSnapshot->flags |= Snapshot::kFlagFboTarget | Snapshot::kFlagIsFboLayer;
+    mSnapshot->flags |= Snapshot::kFlagFboTarget | Snapshot::kFlagIsFboLayer |
+            Snapshot::kFlagDirtyOrtho;
     mSnapshot->fbo = layer->getFbo();
     mSnapshot->resetTransform(-bounds.left, -bounds.top, 0.0f);
     mSnapshot->resetClip(clip.left, clip.top, clip.right, clip.bottom);
     mSnapshot->viewport.set(0.0f, 0.0f, bounds.getWidth(), bounds.getHeight());
     mSnapshot->height = bounds.getHeight();
+    mSnapshot->orthoMatrix.load(mProjectionMatrix);
 
     endTiling();
     debugOverdraw(false, false);
@@ -880,7 +883,8 @@ bool OpenGLRenderer::createFboLayer(Layer* layer, Rect& bounds, Rect& clip) {
 
     // Change the ortho projection
     glViewport(0, 0, bounds.getWidth(), bounds.getHeight());
-    mSnapshot->orthoMatrix.loadOrtho(0.0f, bounds.getWidth(), bounds.getHeight(), 0.0f, -1.0f, 1.0f);
+
+    mProjectionMatrix.loadOrtho(0.0f, bounds.getWidth(), bounds.getHeight(), 0.0f, -1.0f, 1.0f);
 
     return true;
 }
@@ -1690,14 +1694,12 @@ void OpenGLRenderer::setupDrawModelView(ModelViewMode mode, bool offset,
     }
 
     bool dirty = right - left > 0.0f && bottom - top > 0.0f;
-    const Matrix4& transformMatrix = ignoreTransform ? Matrix4::identity() : *currentTransform();
-    mCaches.currentProgram->set(mSnapshot->orthoMatrix, mModelViewMatrix, transformMatrix, offset);
-    if (dirty && mTrackDirtyRegions) {
-        if (!ignoreTransform) {
-            dirtyLayer(left, top, right, bottom, *currentTransform());
-        } else {
-            dirtyLayer(left, top, right, bottom);
-        }
+    if (!ignoreTransform) {
+        mCaches.currentProgram->set(mProjectionMatrix, mModelViewMatrix, *currentTransform(), offset);
+        if (dirty && mTrackDirtyRegions) dirtyLayer(left, top, right, bottom, *currentTransform());
+    } else {
+        mCaches.currentProgram->set(mProjectionMatrix, mModelViewMatrix, mat4::identity(), offset);
+        if (dirty && mTrackDirtyRegions) dirtyLayer(left, top, right, bottom);
     }
 }
 
diff --git a/libs/hwui/OpenGLRenderer.h b/libs/hwui/OpenGLRenderer.h
index d140428..4f7f01e 100644
--- a/libs/hwui/OpenGLRenderer.h
+++ b/libs/hwui/OpenGLRenderer.h
@@ -930,6 +930,9 @@ private:
      */
     Texture* getTexture(const SkBitmap* bitmap);
 
+    // Ortho matrix used for projection in shaders
+    mat4 mProjectionMatrix;
+
     /**
      * Model-view matrix used to position/size objects
      *
diff --git a/libs/hwui/Snapshot.cpp b/libs/hwui/Snapshot.cpp
index b2df86f..6bfa203 100644
--- a/libs/hwui/Snapshot.cpp
+++ b/libs/hwui/Snapshot.cpp
@@ -55,7 +55,6 @@ Snapshot::Snapshot(const sp<Snapshot>& s, int saveFlags)
         , empty(false)
         , viewport(s->viewport)
         , height(s->height)
-        , orthoMatrix(s->orthoMatrix)
         , alpha(s->alpha) {
 
     if (saveFlags & SkCanvas::kMatrix_SaveFlag) {
diff --git a/libs/hwui/Snapshot.h b/libs/hwui/Snapshot.h
index aede079..038aea8 100644
--- a/libs/hwui/Snapshot.h
+++ b/libs/hwui/Snapshot.h
@@ -65,16 +65,17 @@ public:
          * Indicates that this snapshot is a special type of layer
          * backed by an FBO. This flag only makes sense when the
          * flag kFlagIsLayer is also set.
-         *
-         * Viewport has been modified to fit the new Fbo, and must be
-         * restored when this snapshot is restored.
          */
         kFlagIsFboLayer = 0x4,
         /**
+         * Indicates that this snapshot has changed the ortho matrix.
+         */
+        kFlagDirtyOrtho = 0x8,
+        /**
          * Indicates that this snapshot or an ancestor snapshot is
          * an FBO layer.
          */
-        kFlagFboTarget = 0x8,
+        kFlagFboTarget = 0x10
     };
 
     /**
@@ -182,7 +183,7 @@ public:
     int height;
 
     /**
-     * Contains the current orthographic, projection matrix.
+     * Contains the previous ortho matrix.
      */
     mat4 orthoMatrix;