mirror of
https://gitea.wildfiregames.com/0ad/0ad
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157c6af18e
Avoid cases of filenames Update years in terms and other legal(ish) documents Don't update years in license headers, since change is not meaningful Will add linter rule in seperate commit Happy recompiling everyone! Original Patch By: Nescio Comment By: Gallaecio Differential Revision: D2620 This was SVN commit r27786.
329 lines
9.3 KiB
C++
329 lines
9.3 KiB
C++
/* Copyright (C) 2022 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. 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, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. 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 for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "precompiled.h"
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#include "Texture.h"
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#include "lib/code_annotation.h"
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#include "lib/config2.h"
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#include "renderer/backend/gl/Device.h"
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#include "renderer/backend/gl/DeviceCommandContext.h"
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#include "renderer/backend/gl/Mapping.h"
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#include <algorithm>
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namespace Renderer
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{
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namespace Backend
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{
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namespace GL
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{
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namespace
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{
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GLint CalculateMinFilter(const Sampler::Desc& defaultSamplerDesc, const uint32_t MIPLevelCount)
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{
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if (MIPLevelCount == 1)
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return defaultSamplerDesc.minFilter == Sampler::Filter::LINEAR ? GL_LINEAR : GL_NEAREST;
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if (defaultSamplerDesc.minFilter == Sampler::Filter::LINEAR)
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return defaultSamplerDesc.mipFilter == Sampler::Filter::LINEAR ? GL_LINEAR_MIPMAP_LINEAR : GL_LINEAR_MIPMAP_NEAREST;
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return defaultSamplerDesc.mipFilter == Sampler::Filter::LINEAR ? GL_NEAREST_MIPMAP_LINEAR : GL_NEAREST_MIPMAP_NEAREST;
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}
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GLint AddressModeToGLEnum(Sampler::AddressMode addressMode)
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{
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switch (addressMode)
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{
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case Sampler::AddressMode::REPEAT: return GL_REPEAT;
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case Sampler::AddressMode::MIRRORED_REPEAT: return GL_MIRRORED_REPEAT;
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case Sampler::AddressMode::CLAMP_TO_EDGE: return GL_CLAMP_TO_EDGE;
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case Sampler::AddressMode::CLAMP_TO_BORDER: return GL_CLAMP_TO_BORDER;
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}
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return GL_REPEAT;
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}
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GLenum TypeToGLEnum(CTexture::Type type)
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{
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GLenum target = GL_TEXTURE_2D;
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switch (type)
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{
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case CTexture::Type::TEXTURE_2D:
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target = GL_TEXTURE_2D;
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break;
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case CTexture::Type::TEXTURE_2D_MULTISAMPLE:
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#if CONFIG2_GLES
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ENSURE(false && "Multisample textures are unsupported on GLES");
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#else
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target = GL_TEXTURE_2D_MULTISAMPLE;
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#endif
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break;
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case CTexture::Type::TEXTURE_CUBE:
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target = GL_TEXTURE_CUBE_MAP;
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break;
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}
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return target;
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}
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} // anonymous namespace
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// static
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std::unique_ptr<CTexture> CTexture::Create(
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CDevice* device, const char* name, const Type type, const uint32_t usage,
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const Format format, const uint32_t width, const uint32_t height,
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const Sampler::Desc& defaultSamplerDesc, const uint32_t MIPLevelCount, const uint32_t sampleCount)
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{
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std::unique_ptr<CTexture> texture(new CTexture());
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ENSURE(format != Format::UNDEFINED);
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ENSURE(width > 0 && height > 0 && MIPLevelCount > 0);
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ENSURE((type == Type::TEXTURE_2D_MULTISAMPLE && sampleCount > 1 && !(usage & ITexture::Usage::SAMPLED)) || sampleCount == 1);
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texture->m_Device = device;
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texture->m_Type = type;
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texture->m_Usage = usage;
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texture->m_Format = format;
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texture->m_Width = width;
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texture->m_Height = height;
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texture->m_MIPLevelCount = MIPLevelCount;
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glGenTextures(1, &texture->m_Handle);
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ogl_WarnIfError();
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const GLenum target = TypeToGLEnum(type);
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CDeviceCommandContext::ScopedBind scopedBind(
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texture->m_Device->GetActiveCommandContext(), target, texture->m_Handle);
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// It's forbidden to set sampler state for multisample textures.
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if (type != Type::TEXTURE_2D_MULTISAMPLE)
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{
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glTexParameteri(target, GL_TEXTURE_MIN_FILTER, CalculateMinFilter(defaultSamplerDesc, MIPLevelCount));
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glTexParameteri(target, GL_TEXTURE_MAG_FILTER, defaultSamplerDesc.magFilter == Sampler::Filter::LINEAR ? GL_LINEAR : GL_NEAREST);
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ogl_WarnIfError();
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glTexParameteri(target, GL_TEXTURE_WRAP_S, AddressModeToGLEnum(defaultSamplerDesc.addressModeU));
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glTexParameteri(target, GL_TEXTURE_WRAP_T, AddressModeToGLEnum(defaultSamplerDesc.addressModeV));
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}
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#if !CONFIG2_GLES
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if (type == Type::TEXTURE_CUBE)
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glTexParameteri(target, GL_TEXTURE_WRAP_R, AddressModeToGLEnum(defaultSamplerDesc.addressModeW));
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#endif
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ogl_WarnIfError();
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#if !CONFIG2_GLES
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glTexParameteri(target, GL_TEXTURE_BASE_LEVEL, 0);
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glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, MIPLevelCount - 1);
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if (defaultSamplerDesc.mipLODBias != 0.0f)
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glTexParameteri(target, GL_TEXTURE_LOD_BIAS, defaultSamplerDesc.mipLODBias);
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#endif // !CONFIG2_GLES
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if (type == Type::TEXTURE_2D && defaultSamplerDesc.anisotropyEnabled)
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{
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ENSURE(texture->m_Device->GetCapabilities().anisotropicFiltering);
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const float maxAnisotropy = std::min(
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defaultSamplerDesc.maxAnisotropy, texture->m_Device->GetCapabilities().maxAnisotropy);
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glTexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT, maxAnisotropy);
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}
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if (defaultSamplerDesc.addressModeU == Sampler::AddressMode::CLAMP_TO_BORDER ||
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defaultSamplerDesc.addressModeV == Sampler::AddressMode::CLAMP_TO_BORDER ||
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defaultSamplerDesc.addressModeW == Sampler::AddressMode::CLAMP_TO_BORDER)
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{
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CColor borderColor(0.0f, 0.0f, 0.0f, 0.0f);
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switch (defaultSamplerDesc.borderColor)
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{
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case Sampler::BorderColor::TRANSPARENT_BLACK:
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break;
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case Sampler::BorderColor::OPAQUE_BLACK:
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borderColor = CColor(0.0f, 0.0f, 0.0f, 1.0f);
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break;
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case Sampler::BorderColor::OPAQUE_WHITE:
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borderColor = CColor(1.0f, 1.0f, 1.0f, 1.0f);
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break;
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}
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glTexParameterfv(target, GL_TEXTURE_BORDER_COLOR, borderColor.AsFloatArray().data());
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}
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ogl_WarnIfError();
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if (type == CTexture::Type::TEXTURE_2D)
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{
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bool compressedFormat = false;
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GLint internalFormat = GL_RGBA;
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// Actually pixel data is nullptr so it doesn't make sense to account
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// it, but in theory some buggy drivers might complain about invalid
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// pixel format.
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GLenum pixelFormat = GL_RGBA;
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GLenum pixelType = GL_UNSIGNED_BYTE;
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switch (format)
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{
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case Format::UNDEFINED:
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debug_warn("Texture should defined format");
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break;
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case Format::R8G8B8A8_UNORM:
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break;
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case Format::R8G8B8_UNORM:
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internalFormat = GL_RGB;
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pixelFormat = GL_RGB;
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pixelType = GL_UNSIGNED_BYTE;
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break;
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#if !CONFIG2_GLES
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case Format::R8_UNORM:
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internalFormat = GL_RED;
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pixelFormat = GL_RED;
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pixelType = GL_UNSIGNED_BYTE;
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break;
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#endif
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case Format::A8_UNORM:
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internalFormat = GL_ALPHA;
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pixelFormat = GL_ALPHA;
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pixelType = GL_UNSIGNED_BYTE;
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break;
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case Format::L8_UNORM:
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internalFormat = GL_LUMINANCE;
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pixelFormat = GL_LUMINANCE;
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pixelType = GL_UNSIGNED_BYTE;
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break;
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#if CONFIG2_GLES
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// GLES requires pixel type == UNSIGNED_SHORT or UNSIGNED_INT for depth.
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case Format::D16_UNORM: FALLTHROUGH;
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case Format::D24_UNORM: FALLTHROUGH;
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case Format::D32_SFLOAT:
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internalFormat = GL_DEPTH_COMPONENT;
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pixelFormat = GL_DEPTH_COMPONENT;
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pixelType = GL_UNSIGNED_SHORT;
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break;
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case Format::D24_UNORM_S8_UINT:
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debug_warn("Unsupported format");
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break;
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#else
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case Format::D16_UNORM:
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internalFormat = GL_DEPTH_COMPONENT16;
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pixelFormat = GL_DEPTH_COMPONENT;
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pixelType = GL_UNSIGNED_SHORT;
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break;
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case Format::D24_UNORM:
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internalFormat = GL_DEPTH_COMPONENT24;
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pixelFormat = GL_DEPTH_COMPONENT;
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pixelType = GL_UNSIGNED_SHORT;
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break;
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case Format::D32_SFLOAT:
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internalFormat = GL_DEPTH_COMPONENT32;
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pixelFormat = GL_DEPTH_COMPONENT;
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pixelType = GL_UNSIGNED_SHORT;
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break;
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case Format::D24_UNORM_S8_UINT:
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internalFormat = GL_DEPTH24_STENCIL8_EXT;
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pixelFormat = GL_DEPTH_STENCIL_EXT;
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pixelType = GL_UNSIGNED_INT_24_8_EXT;
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break;
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#endif
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case Format::BC1_RGB_UNORM: FALLTHROUGH;
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case Format::BC1_RGBA_UNORM: FALLTHROUGH;
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case Format::BC2_UNORM: FALLTHROUGH;
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case Format::BC3_UNORM:
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compressedFormat = true;
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break;
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default:
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debug_warn("Unsupported format.");
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}
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// glCompressedTexImage2D can't accept a null data, so we will initialize it during uploading.
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if (!compressedFormat)
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{
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for (uint32_t level = 0; level < MIPLevelCount; ++level)
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{
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glTexImage2D(target, level, internalFormat,
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std::max(1u, width >> level), std::max(1u, height >> level),
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0, pixelFormat, pixelType, nullptr);
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}
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}
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}
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else if (type == CTexture::Type::TEXTURE_2D_MULTISAMPLE)
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{
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ENSURE(MIPLevelCount == 1);
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#if !CONFIG2_GLES
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if (format == Format::R8G8B8A8_UNORM)
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{
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glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, sampleCount, GL_RGBA8, width, height, GL_TRUE);
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}
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else if (format == Format::D24_UNORM_S8_UINT)
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{
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glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, sampleCount, GL_DEPTH24_STENCIL8_EXT, width, height, GL_TRUE);
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}
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else
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#endif // !CONFIG2_GLES
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{
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debug_warn("Unsupported format");
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}
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}
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#if !CONFIG2_GLES
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if (IsDepthFormat(format))
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{
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if (defaultSamplerDesc.compareEnabled)
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{
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_R_TO_TEXTURE);
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glTexParameteri(
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GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC,
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Mapping::FromCompareOp(defaultSamplerDesc.compareOp));
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}
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else
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_NONE);
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}
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#endif
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ogl_WarnIfError();
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if (texture->m_Device->GetCapabilities().debugLabels)
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{
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glObjectLabel(GL_TEXTURE, texture->m_Handle, -1, name);
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}
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return texture;
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}
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CTexture::CTexture() = default;
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CTexture::~CTexture()
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{
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m_Device->GetActiveCommandContext()->OnTextureDestroy(this);
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if (m_Handle)
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glDeleteTextures(1, &m_Handle);
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}
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IDevice* CTexture::GetDevice()
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{
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return m_Device;
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}
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} // namespace GL
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} // namespace Backend
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} // namespace Renderer
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