From e30739a1e1d90183bc6bf7414e409e89016881f5 Mon Sep 17 00:00:00 2001
From: Timothy Liang <timliang@google.com>
Date: Tue, 31 Jul 2018 10:51:17 -0400
Subject: implemented copy surface as draw for metal gpu backend

Bug: skia:
Change-Id: Ie61bd6ad9f288b8a025d44f887a0954101a7d710
Reviewed-on: https://skia-review.googlesource.com/142687
Commit-Queue: Timothy Liang <timliang@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
---
 src/gpu/mtl/GrMtlCopyManager.h | 53 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 src/gpu/mtl/GrMtlCopyManager.h

(limited to 'src/gpu/mtl/GrMtlCopyManager.h')

diff --git a/src/gpu/mtl/GrMtlCopyManager.h b/src/gpu/mtl/GrMtlCopyManager.h
new file mode 100644
index 0000000000..7899397e1c
--- /dev/null
+++ b/src/gpu/mtl/GrMtlCopyManager.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2018 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+*/
+
+#ifndef GrMtlCopyManager_DEFINED
+#define GrMtlCopyManager_DEFINED
+
+#include "GrTypes.h"
+
+#import <metal/metal.h>
+
+class GrMtlCopyPipelineState;
+class GrMtlGpu;
+class GrSurface;
+struct SkIPoint;
+struct SkIRect;
+
+class GrMtlCopyManager {
+public:
+    GrMtlCopyManager(GrMtlGpu* gpu) : fGpu(gpu) {}
+
+    bool copySurfaceAsDraw(GrSurface* dst, GrSurfaceOrigin dstOrigin,
+                           GrSurface* src, GrSurfaceOrigin srcOrigin,
+                           const SkIRect& srcRect, const SkIPoint& dstPoint,
+                           bool canDiscardOutsideDstRect);
+
+    static bool IsCompatible(const GrMtlCopyPipelineState*, MTLPixelFormat dstPixelFormat);
+
+private:
+    enum BufferIndex {
+        kUniform_BufferIndex,
+        kAttribute_BufferIndex,
+    };
+
+    void createCopyProgramBuffer();
+    void createCopyProgramShaders();
+    void createCopyProgramVertexDescriptor();
+
+    void createCopyProgram();
+
+    id<MTLSamplerState>  fSamplerState;
+    id<MTLBuffer>        fVertexAttributeBuffer;
+    id<MTLFunction>      fVertexFunction;
+    id<MTLFunction>      fFragmentFunction;
+    MTLVertexDescriptor* fVertexDescriptor;
+
+    GrMtlGpu* fGpu;
+};
+
+#endif
-- 
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