74b8d32332
Adds a mechanism for processors to add buffer accesses and implements them in the GL backend. BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1870893002 Review URL: https://codereview.chromium.org/1870893002
60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
/*
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* Copyright 2016 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef GrBufferAccess_DEFINED
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#define GrBufferAccess_DEFINED
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#include "GrBuffer.h"
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#include "GrGpuResourceRef.h"
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/**
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* Used to represent a texel buffer that will be read in a GrProcessor. It holds a GrBuffer along
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* with an associated offset and texel config.
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*/
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class GrBufferAccess : public SkNoncopyable {
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public:
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/**
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* Must be initialized before adding to a GrProcessor's buffer access list.
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*/
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void reset(intptr_t offsetInBytes, GrPixelConfig texelConfig, GrBuffer* buffer,
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GrShaderFlags visibility = kFragment_GrShaderFlag) {
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fOffsetInBytes = offsetInBytes;
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fTexelConfig = texelConfig;
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fBuffer.set(SkRef(buffer), kRead_GrIOType);
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fVisibility = visibility;
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}
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bool operator==(const GrBufferAccess& that) const {
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return fOffsetInBytes == that.fOffsetInBytes &&
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fTexelConfig == that.fTexelConfig &&
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this->buffer() == that.buffer() &&
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fVisibility == that.fVisibility;
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}
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bool operator!=(const GrBufferAccess& that) const { return !(*this == that); }
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intptr_t offsetInBytes() const { return fOffsetInBytes; }
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GrPixelConfig texelConfig() const { return fTexelConfig; }
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GrBuffer* buffer() const { return fBuffer.get(); }
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GrShaderFlags visibility() const { return fVisibility; }
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/**
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* For internal use by GrProcessor.
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*/
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const GrGpuResourceRef* getProgramBuffer() const { return &fBuffer;}
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private:
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intptr_t fOffsetInBytes;
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GrPixelConfig fTexelConfig;
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GrTGpuResourceRef<GrBuffer> fBuffer;
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GrShaderFlags fVisibility;
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typedef SkNoncopyable INHERITED;
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};
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#endif
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