121 lines
3.8 KiB
C++
121 lines
3.8 KiB
C++
// Copyright 2013 Dolphin Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "VideoBackends/OGL/SamplerCache.h"
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#include <memory>
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#include "Common/CommonTypes.h"
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#include "VideoBackends/OGL/OGLConfig.h"
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#include "VideoCommon/VideoConfig.h"
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namespace OGL
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{
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std::unique_ptr<SamplerCache> g_sampler_cache;
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SamplerCache::SamplerCache()
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{
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glGenSamplers(1, &m_point_sampler);
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glGenSamplers(1, &m_linear_sampler);
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glSamplerParameteri(m_point_sampler, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glSamplerParameteri(m_point_sampler, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glSamplerParameteri(m_point_sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glSamplerParameteri(m_point_sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glSamplerParameteri(m_linear_sampler, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glSamplerParameteri(m_linear_sampler, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glSamplerParameteri(m_linear_sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glSamplerParameteri(m_linear_sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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}
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SamplerCache::~SamplerCache()
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{
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Clear();
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glDeleteSamplers(1, &m_point_sampler);
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glDeleteSamplers(1, &m_linear_sampler);
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}
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void SamplerCache::BindNearestSampler(int stage)
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{
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glBindSampler(stage, m_point_sampler);
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}
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void SamplerCache::BindLinearSampler(int stage)
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{
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glBindSampler(stage, m_linear_sampler);
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}
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void SamplerCache::SetSamplerState(u32 stage, const SamplerState& state)
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{
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if (m_active_samplers[stage].first == state && m_active_samplers[stage].second != 0)
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return;
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auto it = m_cache.find(state);
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if (it == m_cache.end())
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{
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GLuint sampler;
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glGenSamplers(1, &sampler);
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SetParameters(sampler, state);
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it = m_cache.emplace(state, sampler).first;
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}
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m_active_samplers[stage].first = state;
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m_active_samplers[stage].second = it->second;
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glBindSampler(stage, it->second);
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}
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void SamplerCache::InvalidateBinding(u32 stage)
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{
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m_active_samplers[stage].second = 0;
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}
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void SamplerCache::SetParameters(GLuint sampler_id, const SamplerState& params)
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{
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GLenum min_filter;
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GLenum mag_filter = (params.tm0.mag_filter == FilterMode::Near) ? GL_NEAREST : GL_LINEAR;
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if (params.tm0.mipmap_filter == FilterMode::Linear)
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{
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min_filter = (params.tm0.min_filter == FilterMode::Near) ? GL_NEAREST_MIPMAP_LINEAR :
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GL_LINEAR_MIPMAP_LINEAR;
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}
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else
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{
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min_filter = (params.tm0.min_filter == FilterMode::Near) ? GL_NEAREST_MIPMAP_NEAREST :
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GL_LINEAR_MIPMAP_NEAREST;
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}
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glSamplerParameteri(sampler_id, GL_TEXTURE_MIN_FILTER, min_filter);
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glSamplerParameteri(sampler_id, GL_TEXTURE_MAG_FILTER, mag_filter);
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static constexpr std::array<GLenum, 3> address_modes = {
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{GL_CLAMP_TO_EDGE, GL_REPEAT, GL_MIRRORED_REPEAT}};
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glSamplerParameteri(sampler_id, GL_TEXTURE_WRAP_S,
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address_modes[static_cast<u32>(params.tm0.wrap_u.Value())]);
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glSamplerParameteri(sampler_id, GL_TEXTURE_WRAP_T,
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address_modes[static_cast<u32>(params.tm0.wrap_v.Value())]);
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glSamplerParameterf(sampler_id, GL_TEXTURE_MIN_LOD, params.tm1.min_lod / 16.f);
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glSamplerParameterf(sampler_id, GL_TEXTURE_MAX_LOD, params.tm1.max_lod / 16.f);
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if (g_ActiveConfig.backend_info.bSupportsLodBiasInSampler)
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{
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glSamplerParameterf(sampler_id, GL_TEXTURE_LOD_BIAS, params.tm0.lod_bias / 256.f);
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}
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if (params.tm0.anisotropic_filtering && g_ogl_config.bSupportsAniso)
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{
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glSamplerParameterf(sampler_id, GL_TEXTURE_MAX_ANISOTROPY_EXT,
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static_cast<float>(1 << g_ActiveConfig.iMaxAnisotropy));
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}
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}
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void SamplerCache::Clear()
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{
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for (auto& p : m_cache)
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glDeleteSamplers(1, &p.second);
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for (auto& p : m_active_samplers)
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p.second = 0;
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m_cache.clear();
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}
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} // namespace OGL
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