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//
// Copyright 2014 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// SamplerGL.cpp: Defines the rx::SamplerGL class, an implementation of SamplerImpl.
#include "libANGLE/renderer/gl/SamplerGL.h"
#include "libANGLE/renderer/gl/FunctionsGL.h"
#include "libANGLE/renderer/gl/StateManagerGL.h"
namespace
{
template <typename T>
static inline void SyncSamplerStateMember(const rx::FunctionsGL *functions,
GLuint sampler,
const gl::SamplerState &newState,
gl::SamplerState &curState,
GLenum name,
T(gl::SamplerState::*samplerMember))
{
if (curState.*samplerMember != newState.*samplerMember)
{
curState.*samplerMember = newState.*samplerMember;
functions->samplerParameterf(sampler, name, static_cast<GLfloat>(curState.*samplerMember));
}
}
}
namespace rx
{
SamplerGL::SamplerGL(const FunctionsGL *functions, StateManagerGL *stateManager)
: SamplerImpl(),
mFunctions(functions),
mStateManager(stateManager),
mAppliedSamplerState(),
mSamplerID(0)
{
mFunctions->genSamplers(1, &mSamplerID);
}
SamplerGL::~SamplerGL()
{
mStateManager->deleteSampler(mSamplerID);
mSamplerID = 0;
}
void SamplerGL::syncState(const gl::SamplerState &samplerState) const
{
// clang-format off
SyncSamplerStateMember(mFunctions, mSamplerID, samplerState, mAppliedSamplerState, GL_TEXTURE_MIN_FILTER, &gl::SamplerState::minFilter);
SyncSamplerStateMember(mFunctions, mSamplerID, samplerState, mAppliedSamplerState, GL_TEXTURE_MAG_FILTER, &gl::SamplerState::magFilter);
SyncSamplerStateMember(mFunctions, mSamplerID, samplerState, mAppliedSamplerState, GL_TEXTURE_WRAP_S, &gl::SamplerState::wrapS);
SyncSamplerStateMember(mFunctions, mSamplerID, samplerState, mAppliedSamplerState, GL_TEXTURE_WRAP_T, &gl::SamplerState::wrapT);
SyncSamplerStateMember(mFunctions, mSamplerID, samplerState, mAppliedSamplerState, GL_TEXTURE_WRAP_R, &gl::SamplerState::wrapR);
SyncSamplerStateMember(mFunctions, mSamplerID, samplerState, mAppliedSamplerState, GL_TEXTURE_MAX_ANISOTROPY_EXT, &gl::SamplerState::maxAnisotropy);
SyncSamplerStateMember(mFunctions, mSamplerID, samplerState, mAppliedSamplerState, GL_TEXTURE_MIN_LOD, &gl::SamplerState::minLod);
SyncSamplerStateMember(mFunctions, mSamplerID, samplerState, mAppliedSamplerState, GL_TEXTURE_MAX_LOD, &gl::SamplerState::maxLod);
SyncSamplerStateMember(mFunctions, mSamplerID, samplerState, mAppliedSamplerState, GL_TEXTURE_COMPARE_MODE, &gl::SamplerState::compareMode);
SyncSamplerStateMember(mFunctions, mSamplerID, samplerState, mAppliedSamplerState, GL_TEXTURE_COMPARE_FUNC, &gl::SamplerState::compareFunc);
// clang-format on
}
GLuint SamplerGL::getSamplerID() const
{
return mSamplerID;
}
}
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