Added GrSurfaceContext and GrTextureContext

This lets copy-to-texture to be treated like copy-to-rt.
To match current behavior, though, copies to texture are
still executed immediately (forcing a flush).

Once MDB is enabled, copies to texture will be deferred.

BUG=skia:

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=5093

Change-Id: Icc0ce5435507a5f0a237c22eedef879824952367
Reviewed-on: https://skia-review.googlesource.com/5093
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>

1 files changed, 53 insertions, 0 deletions

diff --git a/include/gpu/GrTextureContext.h b/include/gpu/GrTextureContext.h
new file mode 100644
index 0000000000..da71c07c72
--- /dev/null
+++ b/include/gpu/GrTextureContext.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrTextureContext_DEFINED
+#define GrTextureContext_DEFINED
+
+#include "GrSurfaceContext.h"
+#include "../private/GrTextureProxy.h"
+
+class GrContext;
+class GrDrawingManager;
+class GrSurface;
+class GrTextureOpList;
+class GrTextureProxy;
+struct SkIPoint;
+struct SkIRect;
+
+/**
+ * A helper object to orchestrate commands (currently just copies) for GrSurfaces that are
+ * GrTextures and not GrRenderTargets.
+ */
+class SK_API GrTextureContext : public GrSurfaceContext {
+public:
+    ~GrTextureContext() override;
+
+    bool copySurface(GrSurface* src, const SkIRect& srcRect, const SkIPoint& dstPoint) override;
+
+protected:
+    GrTextureContext(GrContext*, GrDrawingManager*, sk_sp<GrTextureProxy>, GrAuditTrail*,
+                     GrSingleOwner*);
+
+    GrDrawingManager* drawingManager() { return fDrawingManager; }
+
+    SkDEBUGCODE(void validate() const;)
+
+private:
+    friend class GrDrawingManager; // for ctor
+
+    GrTextureOpList* getOpList();
+
+    GrDrawingManager*            fDrawingManager;
+    sk_sp<GrTextureProxy>        fTextureProxy;
+
+    // In MDB-mode the GrOpList can be closed by some other renderTargetContext that has picked
+    // it up. For this reason, the GrOpList should only ever be accessed via 'getOpList'.
+    GrTextureOpList*             fOpList;
+};
+
+#endif