Create GrTextureOpList to support deferred copy batches for textures

BUG=skia:

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=3967

Change-Id: I63b926f63294795f999a130c0ceead87fbaf978d
Reviewed-on: https://skia-review.googlesource.com/3967
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>

1 files changed, 69 insertions, 0 deletions

diff --git a/src/gpu/GrTextureOpList.h b/src/gpu/GrTextureOpList.h
new file mode 100644
index 0000000000..5b700dcaed
--- /dev/null
+++ b/src/gpu/GrTextureOpList.h
@@ -0,0 +1,69 @@
+/*
+ * 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 GrTexureOpList_DEFINED
+#define GrTexureOpList_DEFINED
+
+#include "GrOpList.h"
+
+#include "SkTArray.h"
+
+class GrAuditTrail;
+class GrBatch;
+class GrGpu;
+class GrTexture;
+struct SkIPoint;
+struct SkIRect;
+
+class GrTextureOpList final : public GrOpList {
+public:
+    GrTextureOpList(GrTexture*, GrGpu*, GrAuditTrail*);
+
+    ~GrTextureOpList() override;
+
+    /**
+     * Empties the draw buffer of any queued up draws.
+     */
+    void reset() override;
+
+    void abandonGpuResources() override {}
+    void freeGpuResources() override {}
+
+    /**
+     * Together these two functions flush all queued up draws to GrCommandBuffer. The return value
+     * of drawBatches() indicates whether any commands were actually issued to the GPU.
+     */
+    void prepareBatches(GrBatchFlushState* flushState) override;
+    bool drawBatches(GrBatchFlushState* flushState) override;
+
+    /**
+     * Copies a pixel rectangle from one surface to another. This call may finalize
+     * reserved vertex/index data (as though a draw call was made). The src pixels
+     * copied are specified by srcRect. They are copied to a rect of the same
+     * size in dst with top left at dstPoint. If the src rect is clipped by the
+     * src bounds then  pixel values in the dst rect corresponding to area clipped
+     * by the src rect are not overwritten. This method is not guaranteed to succeed
+     * depending on the type of surface, configs, etc, and the backend-specific
+     * limitations.
+     */
+    bool copySurface(GrSurface* dst,
+                     GrSurface* src,
+                     const SkIRect& srcRect,
+                     const SkIPoint& dstPoint);
+
+    SkDEBUGCODE(void dump() const override;)
+
+private:
+    void recordBatch(GrBatch*);
+
+    SkSTArray<2, sk_sp<GrBatch>, true> fRecordedBatches;
+    GrGpu*                             fGpu;
+
+    typedef GrOpList INHERITED;
+};
+
+#endif