Added texture samplers
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Lynix
382
src/Nazara/Renderer/TextureSampler.cpp
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382
src/Nazara/Renderer/TextureSampler.cpp
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// Copyright (C) 2012 Jérôme Leclercq
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// This file is part of the "Nazara Engine - Renderer module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#include <Nazara/Renderer/OpenGL.hpp>
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#include <Nazara/Renderer/TextureSampler.hpp>
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#include <Nazara/Core/Error.hpp>
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#include <Nazara/Renderer/Config.hpp>
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#include <Nazara/Renderer/Renderer.hpp>
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#include <Nazara/Renderer/Texture.hpp>
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#include <Nazara/Renderer/Debug.hpp>
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namespace
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{
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std::map<nzUInt32, GLuint> s_samplers;
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nzUInt8 s_maxAnisotropyLevel;
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bool s_useAnisotropicFilter;
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}
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NzTextureSampler::NzTextureSampler() :
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m_filterMode(nzSamplerFilter_Default),
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m_wrapMode(nzSamplerWrap_Default),
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m_anisotropicLevel(0),
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m_mipmaps(true),
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m_samplerId(0)
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{
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}
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nzUInt8 NzTextureSampler::GetAnisotropicLevel() const
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{
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return m_anisotropicLevel;
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}
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nzSamplerFilter NzTextureSampler::GetFilterMode() const
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{
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return m_filterMode;
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}
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nzSamplerWrap NzTextureSampler::GetWrapMode() const
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{
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return m_wrapMode;
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}
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void NzTextureSampler::SetAnisotropyLevel(nzUInt8 anisotropyLevel)
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{
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#ifdef NAZARA_DEBUG
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if (!NzRenderer::IsInitialized())
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{
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NazaraError("Renderer module must be initialized");
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return;
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}
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#endif
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if (m_anisotropicLevel != anisotropyLevel)
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{
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if (anisotropyLevel > s_maxAnisotropyLevel)
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{
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NazaraWarning("Anisotropy level is over maximum anisotropy level (" + NzString::Number(anisotropyLevel) + " > " + NzString::Number(s_maxAnisotropyLevel));
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anisotropyLevel = s_maxAnisotropyLevel;
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}
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m_anisotropicLevel = anisotropyLevel;
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m_samplerId = 0;
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}
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}
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void NzTextureSampler::SetFilterMode(nzSamplerFilter filterMode)
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{
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if (m_filterMode != filterMode)
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{
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m_filterMode = filterMode;
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m_samplerId = 0;
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}
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}
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void NzTextureSampler::SetWrapMode(nzSamplerWrap wrapMode)
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{
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if (m_wrapMode != wrapMode)
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{
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m_wrapMode = wrapMode;
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m_samplerId = 0;
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}
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}
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nzUInt8 NzTextureSampler::GetDefaultAnisotropicLevel()
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{
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return s_defaultAnisotropyLevel;
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}
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nzSamplerFilter NzTextureSampler::GetDefaultFilterMode()
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{
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return s_defaultFilterMode;
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}
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nzSamplerWrap NzTextureSampler::GetDefaultWrapMode()
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{
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return s_defaultWrapMode;
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}
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void NzTextureSampler::SetDefaultAnisotropyLevel(nzUInt8 anisotropyLevel)
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{
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#if NAZARA_RENDERER_SAFE
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if (anisotropyLevel == 0)
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{
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NazaraError("Default anisotropy level mode cannot be set to default value (0)");
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return;
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}
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#endif
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#ifdef NAZARA_DEBUG
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if (!NzRenderer::IsInitialized())
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{
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NazaraError("Renderer module must be initialized");
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return;
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}
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#endif
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if (anisotropyLevel > s_maxAnisotropyLevel)
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{
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NazaraWarning("Anisotropy level is over maximum anisotropy level (" + NzString::Number(anisotropyLevel) + " > " + NzString::Number(s_maxAnisotropyLevel));
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anisotropyLevel = s_maxAnisotropyLevel;
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}
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s_defaultAnisotropyLevel = anisotropyLevel;
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if (s_useAnisotropicFilter)
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{
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for (auto pair : s_samplers)
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{
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if (((pair.first >> 5) & 0xFF) == 0)
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glSamplerParameterf(pair.second, GL_TEXTURE_MAX_ANISOTROPY_EXT, static_cast<float>(anisotropyLevel));
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}
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}
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}
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void NzTextureSampler::SetDefaultFilterMode(nzSamplerFilter filterMode)
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{
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#if NAZARA_RENDERER_SAFE
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if (filterMode == nzSamplerFilter_Default)
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{
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NazaraError("Default filter mode cannot be set to default enum value (nzSamplerFilter_Default)");
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return;
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}
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#endif
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s_defaultFilterMode = filterMode;
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for (auto pair : s_samplers)
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{
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if (((pair.first >> 1) & 0x3) == nzSamplerFilter_Default)
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{
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bool mipmaps = pair.first & 0x1;
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switch (filterMode)
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{
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case nzSamplerFilter_Bilinear:
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if (mipmaps)
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glSamplerParameteri(pair.second, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
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else
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glSamplerParameteri(pair.second, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glSamplerParameteri(pair.second, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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break;
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case nzSamplerFilter_Nearest:
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if (mipmaps)
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glSamplerParameteri(pair.second, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
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else
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glSamplerParameteri(pair.second, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glSamplerParameteri(pair.second, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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break;
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case nzSamplerFilter_Trilinear:
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if (mipmaps)
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glSamplerParameteri(pair.second, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
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else
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glSamplerParameteri(pair.second, GL_TEXTURE_MIN_FILTER, GL_LINEAR); // Filtrage bilinéaire
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glSamplerParameteri(pair.second, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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break;
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default:
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NazaraError("Texture filter not handled (0x" + NzString::Number(filterMode, 16) + ')');
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break;
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}
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}
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}
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}
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void NzTextureSampler::SetDefaultWrapMode(nzSamplerWrap wrapMode)
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{
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#if NAZARA_RENDERER_SAFE
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if (wrapMode == nzSamplerWrap_Default)
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{
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NazaraError("Default wrap mode cannot be set to default enum value (nzSamplerWrap_Default)");
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return;
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}
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#endif
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s_defaultWrapMode = wrapMode;
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GLenum wrapEnum = NzOpenGL::SamplerWrapMode[wrapMode];
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for (auto pair : s_samplers)
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{
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if (((pair.first >> 3) & 0x3) == nzSamplerWrap_Default)
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{
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glSamplerParameteri(pair.second, GL_TEXTURE_WRAP_R, wrapEnum);
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glSamplerParameteri(pair.second, GL_TEXTURE_WRAP_T, wrapEnum);
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glSamplerParameteri(pair.second, GL_TEXTURE_WRAP_S, wrapEnum);
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}
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}
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}
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void NzTextureSampler::Apply(const NzTexture* texture)
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{
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// On considère que la texture est déjà active lors de l'appel à cette fonction
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GLenum target = NzOpenGL::TextureTarget[texture->GetType()];
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if (s_useAnisotropicFilter)
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{
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nzUInt8 anisotropyLevel = (m_anisotropicLevel == 0) ? s_defaultAnisotropyLevel : m_anisotropicLevel;
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glTexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT, static_cast<float>(anisotropyLevel));
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}
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nzSamplerFilter filterMode = (m_filterMode == nzSamplerFilter_Default) ? s_defaultFilterMode : m_filterMode;
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switch (filterMode)
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{
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case nzSamplerFilter_Bilinear:
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if (m_mipmaps)
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glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
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else
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glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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break;
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case nzSamplerFilter_Nearest:
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if (m_mipmaps)
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glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
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else
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glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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break;
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case nzSamplerFilter_Trilinear:
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if (m_mipmaps)
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glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
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else
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glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR); // Filtrage bilinéaire
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glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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break;
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default:
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NazaraError("Texture filter not handled (0x" + NzString::Number(filterMode, 16) + ')');
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break;
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}
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GLenum wrapMode = NzOpenGL::SamplerWrapMode[(m_wrapMode == nzSamplerWrap_Default) ? s_defaultWrapMode : m_wrapMode];
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switch (texture->GetType())
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{
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// Notez l'absence de "break" ici
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case nzImageType_3D:
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glTexParameteri(target, GL_TEXTURE_WRAP_R, wrapMode);
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case nzImageType_2D:
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case nzImageType_2D_Array:
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case nzImageType_Cubemap:
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glTexParameteri(target, GL_TEXTURE_WRAP_T, wrapMode);
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case nzImageType_1D:
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case nzImageType_1D_Array:
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glTexParameteri(target, GL_TEXTURE_WRAP_S, wrapMode);
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break;
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}
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}
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void NzTextureSampler::Bind(unsigned int unit)
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{
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static_assert(nzSamplerFilter_Max < 0x4, "Maximum sampler filter mode takes more than 2 bits");
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static_assert(nzSamplerWrap_Max < 0x4, "Maximum sampler wrap mode takes more than 2 bits");
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if (!m_samplerId)
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{
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nzUInt32 key = (m_mipmaps << 0) | // 1 bit
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(m_filterMode << 1) | // 2 bits
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(m_wrapMode << 3) | // 2 bits
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(m_anisotropicLevel << 5); // 8 bits
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auto it = s_samplers.find(key);
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if (it == s_samplers.end())
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{
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GLuint sampler;
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glGenSamplers(1, &sampler);
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if (s_useAnisotropicFilter)
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{
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nzUInt8 anisotropyLevel = (m_anisotropicLevel == 0) ? s_defaultAnisotropyLevel : m_anisotropicLevel;
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glSamplerParameterf(sampler, GL_TEXTURE_MAX_ANISOTROPY_EXT, static_cast<float>(anisotropyLevel));
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}
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nzSamplerFilter filterMode = (m_filterMode == nzSamplerFilter_Default) ? s_defaultFilterMode : m_filterMode;
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switch (filterMode)
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{
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case nzSamplerFilter_Bilinear:
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if (m_mipmaps)
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glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
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else
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glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glSamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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break;
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case nzSamplerFilter_Nearest:
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if (m_mipmaps)
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glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
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else
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glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glSamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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break;
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case nzSamplerFilter_Trilinear:
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if (m_mipmaps)
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glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
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else
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glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_LINEAR); // Filtrage bilinéaire
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glSamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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break;
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default:
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NazaraError("Texture filter not handled (0x" + NzString::Number(filterMode, 16) + ')');
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break;
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}
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GLenum wrapMode = NzOpenGL::SamplerWrapMode[(m_wrapMode == nzSamplerWrap_Default) ? s_defaultWrapMode : m_wrapMode];
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glSamplerParameteri(sampler, GL_TEXTURE_WRAP_R, wrapMode);
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glSamplerParameteri(sampler, GL_TEXTURE_WRAP_T, wrapMode);
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glSamplerParameteri(sampler, GL_TEXTURE_WRAP_S, wrapMode);
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s_samplers[key] = sampler;
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m_samplerId = sampler;
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}
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else
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m_samplerId = it->second;
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}
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glBindSampler(unit, m_samplerId);
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}
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bool NzTextureSampler::UseMipmaps(bool mipmaps)
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{
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if (m_mipmaps != mipmaps)
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{
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m_mipmaps = mipmaps;
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m_samplerId = 0;
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return true; // Renvoie true si la valeur a été changée (Donc s'il faut réappliquer le sampler)
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}
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else
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return false;
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}
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bool NzTextureSampler::Initialize()
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{
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s_maxAnisotropyLevel = NzRenderer::GetMaxAnisotropyLevel();
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s_useAnisotropicFilter = NzOpenGL::IsSupported(nzOpenGLExtension_AnisotropicFilter);
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return true;
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}
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void NzTextureSampler::Uninitialize()
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{
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for (auto it = s_samplers.begin(); it != s_samplers.end(); ++it)
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glDeleteSamplers(1, &it->second);
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s_samplers.clear();
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}
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nzUInt8 NzTextureSampler::s_defaultAnisotropyLevel = 1;
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nzSamplerFilter NzTextureSampler::s_defaultFilterMode = nzSamplerFilter_Trilinear;
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nzSamplerWrap NzTextureSampler::s_defaultWrapMode = nzSamplerWrap_Repeat;
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