Implement path cover with nv_path_rendering

src/gpu/GrInOrderDrawBuffer.cpp

Index: src/gpu/GrInOrderDrawBuffer.cpp
diff --git a/src/gpu/GrInOrderDrawBuffer.cpp b/src/gpu/GrInOrderDrawBuffer.cpp
index 1cd04d9e1b41dd996d0b2d179bf81531e3d4763d..5f07296ab2a92318fc5fa4777cf488e02be29d4a 100644
--- a/src/gpu/GrInOrderDrawBuffer.cpp
+++ b/src/gpu/GrInOrderDrawBuffer.cpp
@@ -385,6 +385,7 @@ void GrInOrderDrawBuffer::onDraw(const DrawInfo& info) {
 }
 
 GrInOrderDrawBuffer::StencilPath::StencilPath() : fStroke(SkStrokeRec::kFill_InitStyle) {}
+GrInOrderDrawBuffer::DrawPath::DrawPath() : fStroke(SkStrokeRec::kFill_InitStyle) {}
 
 void GrInOrderDrawBuffer::onStencilPath(const GrPath* path, const SkStrokeRec& stroke,
                                         SkPath::FillType fill) {
@@ -402,6 +403,22 @@ void GrInOrderDrawBuffer::onStencilPath(const GrPath* path, const SkStrokeRec& s
     sp->fStroke = stroke;
 }
 
+void GrInOrderDrawBuffer::onDrawPath(const GrPath* path, const SkStrokeRec& stroke,
+                                     SkPath::FillType fill) {
+    if (this->needsNewClip()) {
+        this->recordClip();
+    }
+    // TODO: Only compare the subset of GrDrawState relevant to path covering?
+    if (this->needsNewState()) {
+        this->recordState();
+    }
+    DrawPath* cp = this->recordDrawPath();
+    cp->fPath.reset(path);
+    path->ref();
+    cp->fFill = fill;
+    cp->fStroke = stroke;
+}
+
 void GrInOrderDrawBuffer::clear(const SkIRect* rect, GrColor color, GrRenderTarget* renderTarget) {
     SkIRect r;
     if (NULL == renderTarget) {
@@ -436,6 +453,7 @@ void GrInOrderDrawBuffer::reset() {
     fCmds.reset();
     fDraws.reset();
     fStencilPaths.reset();
+    fDrawPaths.reset();
     fStates.reset();
     fClears.reset();
     fVertexPool.reset();
@@ -480,6 +498,7 @@ void GrInOrderDrawBuffer::flush() {
     int currClear       = 0;
     int currDraw        = 0;
     int currStencilPath = 0;
+    int currDrawPath   = 0;
     int currCopySurface = 0;
 
     for (int c = 0; c < numCmds; ++c) {
@@ -501,6 +520,12 @@ void GrInOrderDrawBuffer::flush() {
                 ++currStencilPath;
                 break;
             }
+            case kDrawPath_Cmd: {
+                const DrawPath& cp = fDrawPaths[currDrawPath];
+                fDstGpu->drawPath(cp.fPath.get(), cp.fStroke, cp.fFill);
+                ++currDrawPath;
+                break;
+            }
             case kSetState_Cmd:
                 fStates[currState].restoreTo(&playbackState);
                 ++currState;
@@ -811,6 +836,11 @@ GrInOrderDrawBuffer::StencilPath* GrInOrderDrawBuffer::recordStencilPath() {
     return &fStencilPaths.push_back();
 }
 
+GrInOrderDrawBuffer::DrawPath* GrInOrderDrawBuffer::recordDrawPath() {
+    fCmds.push_back(kDrawPath_Cmd);
+    return &fDrawPaths.push_back();
+}
+
 GrInOrderDrawBuffer::Clear* GrInOrderDrawBuffer::recordClear() {
     fCmds.push_back(kClear_Cmd);
     return &fClears.push_back();