130 lines
3.5 KiB
C++
130 lines
3.5 KiB
C++
// Copyright (C) 2003 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include "SamplerCache.h"
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namespace OGL
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{
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SamplerCache *g_sampler_cache;
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SamplerCache::SamplerCache()
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: m_last_max_anisotropy()
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{}
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SamplerCache::~SamplerCache()
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{
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Clear();
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}
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void SamplerCache::SetSamplerState(int stage, const TexMode0& tm0, const TexMode1& tm1)
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{
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// TODO: can this go somewhere else?
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if (m_last_max_anisotropy != g_ActiveConfig.iMaxAnisotropy)
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{
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m_last_max_anisotropy = g_ActiveConfig.iMaxAnisotropy;
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Clear();
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}
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Params params(tm0, tm1);
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// take equivalent forced linear when bForceFiltering
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if (g_ActiveConfig.bForceFiltering)
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{
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params.tm0.min_filter |= 0x4;
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params.tm0.mag_filter |= 0x1;
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}
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// TODO: Should keep a circular buffer for each stage of recently used samplers.
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auto& active_sampler = m_active_samplers[stage];
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if (active_sampler.first != params || !active_sampler.second.sampler_id)
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{
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// Active sampler does not match parameters (or is invalid), bind the proper one.
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active_sampler.first = params;
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active_sampler.second = GetEntry(params);
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glBindSampler(stage, active_sampler.second.sampler_id);
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}
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}
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auto SamplerCache::GetEntry(const Params& params) -> Value&
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{
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auto& val = m_cache[params];
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if (!val.sampler_id)
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{
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// Sampler not found in cache, create it.
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glGenSamplers(1, &val.sampler_id);
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SetParameters(val.sampler_id, params);
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// TODO: Maybe kill old samplers if the cache gets huge. It doesn't seem to get huge though.
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//ERROR_LOG(VIDEO, "Sampler cache size is now %ld.", m_cache.size());
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}
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return val;
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}
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void SamplerCache::SetParameters(GLuint sampler_id, const Params& params)
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{
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static const GLint min_filters[8] =
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{
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GL_NEAREST,
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GL_NEAREST_MIPMAP_NEAREST,
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GL_NEAREST_MIPMAP_LINEAR,
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GL_NEAREST,
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GL_LINEAR,
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GL_LINEAR_MIPMAP_NEAREST,
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GL_LINEAR_MIPMAP_LINEAR,
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GL_LINEAR,
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};
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static const GLint wrap_settings[4] =
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{
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GL_CLAMP_TO_EDGE,
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GL_REPEAT,
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GL_MIRRORED_REPEAT,
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GL_REPEAT,
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};
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auto& tm0 = params.tm0;
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auto& tm1 = params.tm1;
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glSamplerParameteri(sampler_id, GL_TEXTURE_MIN_FILTER, min_filters[tm0.min_filter % ARRAYSIZE(min_filters)]);
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glSamplerParameteri(sampler_id, GL_TEXTURE_MAG_FILTER, tm0.mag_filter ? GL_LINEAR : GL_NEAREST);
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glSamplerParameteri(sampler_id, GL_TEXTURE_WRAP_S, wrap_settings[tm0.wrap_s]);
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glSamplerParameteri(sampler_id, GL_TEXTURE_WRAP_T, wrap_settings[tm0.wrap_t]);
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glSamplerParameterf(sampler_id, GL_TEXTURE_LOD_BIAS, tm0.lod_bias / 32.f);
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glSamplerParameterf(sampler_id, GL_TEXTURE_MIN_LOD, tm1.min_lod / 16.f);
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glSamplerParameterf(sampler_id, GL_TEXTURE_MAX_LOD, tm1.max_lod / 16.f);
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if (g_ActiveConfig.iMaxAnisotropy > 0)
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glSamplerParameterf(sampler_id, GL_TEXTURE_MAX_ANISOTROPY_EXT, (float)(1 << g_ActiveConfig.iMaxAnisotropy));
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}
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void SamplerCache::Clear()
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{
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for (auto it = m_cache.begin(); it != m_cache.end(); ++it)
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{
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glDeleteSamplers(1, &it->second.sampler_id);
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}
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m_cache.clear();
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}
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}
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