reenable vertices gm, adding picture support

BUG=

Review URL: https://codereview.chromium.org/112913005

git-svn-id: http://skia.googlecode.com/svn/trunk@12845 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/core/SkPictureFlat.h b/src/core/SkPictureFlat.h
index ac8e304..5452501 100644
--- a/src/core/SkPictureFlat.h
+++ b/src/core/SkPictureFlat.h
@@ -77,7 +77,8 @@
 enum DrawVertexFlags {
     DRAW_VERTICES_HAS_TEXS    = 0x01,
     DRAW_VERTICES_HAS_COLORS  = 0x02,
-    DRAW_VERTICES_HAS_INDICES = 0x04
+    DRAW_VERTICES_HAS_INDICES = 0x04,
+    DRAW_VERTICES_HAS_XFER    = 0x08,
 };
 
 ///////////////////////////////////////////////////////////////////////////////
diff --git a/src/core/SkPicturePlayback.cpp b/src/core/SkPicturePlayback.cpp
index cb73689..195afc6 100644
--- a/src/core/SkPicturePlayback.cpp
+++ b/src/core/SkPicturePlayback.cpp
@@ -1025,6 +1025,7 @@
                                       matrix, paint);
             } break;
             case DRAW_VERTICES: {
+                SkAutoTUnref<SkXfermode> xfer;
                 const SkPaint& paint = *getPaint(reader);
                 DrawVertexFlags flags = (DrawVertexFlags)reader.readInt();
                 SkCanvas::VertexMode vmode = (SkCanvas::VertexMode)reader.readInt();
@@ -1048,7 +1049,14 @@
                     indices = (const uint16_t*)reader.skip(
                                                     iCount * sizeof(uint16_t));
                 }
-                canvas.drawVertices(vmode, vCount, verts, texs, colors, NULL,
+                if (flags & DRAW_VERTICES_HAS_XFER) {
+                    int mode = reader.readInt();
+                    if (mode < 0 || mode > SkXfermode::kLastMode) {
+                        mode = SkXfermode::kModulate_Mode;
+                    }
+                    xfer.reset(SkXfermode::Create((SkXfermode::Mode)mode));
+                }
+                canvas.drawVertices(vmode, vCount, verts, texs, colors, xfer,
                                     indices, iCount, paint);
             } break;
             case RESTORE:
diff --git a/src/core/SkPictureRecord.cpp b/src/core/SkPictureRecord.cpp
index 6b49620..b7508b3 100644
--- a/src/core/SkPictureRecord.cpp
+++ b/src/core/SkPictureRecord.cpp
@@ -1189,7 +1189,7 @@
 
 void SkPictureRecord::drawVertices(VertexMode vmode, int vertexCount,
                           const SkPoint vertices[], const SkPoint texs[],
-                          const SkColor colors[], SkXfermode*,
+                          const SkColor colors[], SkXfermode* xfer,
                           const uint16_t indices[], int indexCount,
                           const SkPaint& paint) {
     uint32_t flags = 0;
@@ -1202,6 +1202,12 @@
     if (indexCount > 0) {
         flags |= DRAW_VERTICES_HAS_INDICES;
     }
+    if (NULL != xfer) {
+        SkXfermode::Mode mode;
+        if (xfer->asMode(&mode) && SkXfermode::kModulate_Mode != mode) {
+            flags |= DRAW_VERTICES_HAS_XFER;
+        }
+    }
 
     // op + paint index + flags + vmode + vCount + vertices
     uint32_t size = 5 * kUInt32Size + vertexCount * sizeof(SkPoint);
@@ -1215,6 +1221,9 @@
         // + num indices + indices
         size += 1 * kUInt32Size + SkAlign4(indexCount * sizeof(uint16_t));
     }
+    if (flags & DRAW_VERTICES_HAS_XFER) {
+        size += kUInt32Size;    // mode enum
+    }
 
     size_t initialOffset = this->addDraw(DRAW_VERTICES, &size);
     SkASSERT(initialOffset+getPaintOffset(DRAW_VERTICES, size) == fWriter.bytesWritten());
@@ -1233,6 +1242,11 @@
         addInt(indexCount);
         fWriter.writePad(indices, indexCount * sizeof(uint16_t));
     }
+    if (flags & DRAW_VERTICES_HAS_XFER) {
+        SkXfermode::Mode mode = SkXfermode::kModulate_Mode;
+        (void)xfer->asMode(&mode);
+        addInt(mode);
+    }
     this->validate(initialOffset, size);
 }