247 lines
8.5 KiB
C++
247 lines
8.5 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/.
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*/
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#include "TextDrawable.hpp"
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#include "Scene/Geometry.hpp"
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#include "Scene/Material.hpp"
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#include "Scene/Vertex.hpp"
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#include "Scene/UniformBuffer.hpp"
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#include "Scene/IFontAtlasGenerator.hpp"
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#include "Base/Logger.hpp"
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#include "Host/ResourceLoader.hpp"
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#include "Image/ImageLoader.hpp"
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#include "DataFormat.hpp"
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#include "Base/Logger.hpp"
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#include <fstream>
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#include <utf8.h>
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namespace OpenVulkano::Scene
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{
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namespace
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{
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Shader MakeDefaultShader(const std::string& vertexShader, const std::string& fragmentShader)
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{
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Shader shader;
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shader.AddShaderProgram(ShaderProgramType::VERTEX, "Shader/" + vertexShader);
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shader.AddShaderProgram(ShaderProgramType::FRAGMENT, "Shader/" + fragmentShader);
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shader.AddVertexInputDescription(Vertex::GetVertexInputDescription());
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shader.AddDescriptorSetLayoutBinding(Texture::DESCRIPTOR_SET_LAYOUT_BINDING);
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DescriptorSetLayoutBinding desc = UniformBuffer::DESCRIPTOR_SET_LAYOUT_BINDING;
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desc.stageFlags = ShaderProgramType::FRAGMENT;
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shader.AddDescriptorSetLayoutBinding(desc);
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shader.alphaBlend = true;
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shader.cullMode = CullMode::NONE;
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return shader;
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}
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}
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Shader TextDrawable::DEFAULT_SHADER_BITMAP = MakeDefaultShader("text", "text");
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Shader TextDrawable::DEFAULT_SHADER_SDF = MakeDefaultShader("sdfText", "sdfText");
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Shader TextDrawable::DEFAULT_SHADER_MSDF = MakeDefaultShader("sdfText", "msdfText");
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TextDrawable::TextDrawable(const TextConfig& config)
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{
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m_cfg = config;
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m_uniBuffer.Init(sizeof(TextConfig), &m_cfg, 3);
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m_uniBuffer.binding.stageFlags = ShaderProgramType::FRAGMENT;
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}
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TextDrawable::TextDrawable(const Array<char>& atlasMetadata, const TextConfig& config)
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: TextDrawable(atlasMetadata, nullptr, config)
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{
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}
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TextDrawable::TextDrawable(const std::string& atlasMetadataFile, const TextConfig& config)
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: TextDrawable(Utils::ReadFile(atlasMetadataFile), nullptr, config)
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{
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}
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TextDrawable::TextDrawable(const std::string& atlasMetadataFile, Texture* atlasTex, const TextConfig& config)
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: TextDrawable(Utils::ReadFile(atlasMetadataFile), atlasTex, config)
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{
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}
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TextDrawable::TextDrawable(const Array<char>& atlasMetadata, Texture* atlasTex, const TextConfig& config)
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{
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uint32_t isPacked;
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std::memcpy(&isPacked, atlasMetadata.Data() + (atlasMetadata.Size() - sizeof(uint32_t)), sizeof(uint32_t));
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uint64_t metadataBytes;
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std::memcpy(&metadataBytes, atlasMetadata.Data() + (atlasMetadata.Size() - sizeof(uint32_t) - sizeof(uint64_t)),
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sizeof(uint64_t));
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uint64_t offsetToMetadata = atlasMetadata.Size() - metadataBytes - sizeof(uint32_t) - sizeof(uint64_t);
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m_atlasData = std::make_shared<AtlasData>();
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if (isPacked)
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{
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m_material.texture = &m_atlasData->texture;
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m_atlasData->img = Image::IImageLoader::loadData(reinterpret_cast<const uint8_t*>(atlasMetadata.Data()), offsetToMetadata);
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m_material.texture->format = m_atlasData->img->dataFormat;
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m_material.texture->resolution = m_atlasData->img->resolution;
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m_material.texture->size = m_atlasData->img->data.Size();
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m_material.texture->textureBuffer = m_atlasData->img->data.Data();
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}
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else
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{
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if (atlasTex == nullptr) { throw std::runtime_error("Atlas texture cannot be null with non-packed atlas metadata"); }
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m_atlasData->texture = *atlasTex;
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m_material.texture = atlasTex;
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}
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// metadata info
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size_t read_bytes = offsetToMetadata;
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size_t readMetadataBytes = 0;
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uint32_t unicode = 0;
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std::memcpy(&m_atlasData->meta, atlasMetadata.Data() + read_bytes, sizeof(AtlasMetadata));
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read_bytes += sizeof(AtlasMetadata);
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readMetadataBytes += sizeof(AtlasMetadata);
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while (readMetadataBytes < metadataBytes)
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{
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std::memcpy(&unicode, atlasMetadata.Data() + read_bytes, sizeof(uint32_t));
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read_bytes += sizeof(uint32_t);
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readMetadataBytes += sizeof(uint32_t);
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GlyphInfo& info = m_atlasData->glyphs[unicode];
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std::memcpy(&info, atlasMetadata.Data() + read_bytes, sizeof(GlyphInfo));
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read_bytes += sizeof(GlyphInfo);
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readMetadataBytes += sizeof(GlyphInfo);
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}
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m_cfg = config;
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m_uniBuffer.Init(sizeof(TextConfig), &m_cfg, 3);
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m_uniBuffer.binding.stageFlags = ShaderProgramType::FRAGMENT;
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if (m_atlasData->meta.atlasType == FontAtlasType::BITMAP)
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{
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m_material.texture->m_samplerConfig = &SamplerConfig::NEAREST;
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}
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}
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TextDrawable::TextDrawable(const std::shared_ptr<AtlasData>& atlasData, const TextConfig& config)
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{
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if (!atlasData || atlasData->glyphs.empty() || !atlasData->texture.textureBuffer)
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{
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throw std::runtime_error("Cannot initialize text drawable with empty atlas data");
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}
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m_atlasData = atlasData;
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m_cfg = config;
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m_uniBuffer.Init(sizeof(TextConfig), &m_cfg, 3);
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m_uniBuffer.binding.stageFlags = ShaderProgramType::FRAGMENT;
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}
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void TextDrawable::GenerateText(const std::string& text, const Math::Vector3f& pos)
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{
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if (text.empty())
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{
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return;
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}
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m_text = text;
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auto GetActualLength = [&]()
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{
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auto begin = text.begin();
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auto end = text.end();
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size_t len = 0;
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while (begin != end)
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{
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uint32_t c = utf8::next(begin, end);
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if (c == '\n') continue;
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++len;
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}
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return len;
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};
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size_t len = GetActualLength();
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m_geometry.Close();
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m_geometry.Init(len * 4, len * 6);
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AtlasMetadata* meta;
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std::map<uint32_t, GlyphInfo>* symbols;
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m_material.texture = &m_atlasData->texture;
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symbols = &m_atlasData->glyphs;
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meta = &m_atlasData->meta;
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double cursorX = pos.x;
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auto begin = text.begin();
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auto end = text.end();
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const double lineHeight = meta->lineHeight;
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double posY = pos.y;
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int i = 0;
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Math::Vector3f bmin(pos), bmax(pos);
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bool firstGlyph = true;
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while (begin != end)
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{
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uint32_t c = utf8::next(begin, end);
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if (c == '\n')
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{
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posY -= lineHeight;
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cursorX = pos.x;
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continue;
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}
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if (symbols->find(c) == symbols->end())
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{
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Logger::RENDER->error("Could not find glyph for character {}", c);
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if (symbols->find(static_cast<uint32_t>('?')) != symbols->end())
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{
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c = static_cast<uint32_t>('?');
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}
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else
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{
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Logger::RENDER->error("Could not find glyph for character ? to replace glyph {}", c);
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continue;
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}
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}
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uint32_t vIdx = i * 4;
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uint32_t indices[] = { 1 + vIdx, 2 + vIdx, 3 + vIdx, 1 + vIdx, 3 + vIdx, 0 + vIdx };
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GlyphInfo& info = symbols->at(c);
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// left bottom
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m_geometry.vertices[vIdx].position.x = info.xyz[0].x + cursorX;
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m_geometry.vertices[vIdx].position.y = posY - info.xyz[0].y;
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m_geometry.vertices[vIdx].position.z = info.xyz[0].z;
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m_geometry.vertices[vIdx].textureCoordinates = Math::Vector3f(info.uv[0], 0);
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// right bottom
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m_geometry.vertices[vIdx + 1].position.x = info.xyz[1].x + cursorX;
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m_geometry.vertices[vIdx + 1].position.y = posY - info.xyz[1].y;
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m_geometry.vertices[vIdx + 1].position.z = info.xyz[1].z;
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m_geometry.vertices[vIdx + 1].textureCoordinates = Math::Vector3f(info.uv[1], 0);
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// top right
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m_geometry.vertices[vIdx + 2].position.x = info.xyz[2].x + cursorX;
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m_geometry.vertices[vIdx + 2].position.y = posY + info.xyz[2].y;
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m_geometry.vertices[vIdx + 2].position.z = info.xyz[2].z;
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m_geometry.vertices[vIdx + 2].textureCoordinates = Math::Vector3f(info.uv[2], 0);
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// top left
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m_geometry.vertices[vIdx + 3].position.x = info.xyz[3].x + cursorX;
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m_geometry.vertices[vIdx + 3].position.y = posY + info.xyz[3].y;
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m_geometry.vertices[vIdx + 3].position.z = info.xyz[3].z;
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m_geometry.vertices[vIdx + 3].textureCoordinates = Math::Vector3f(info.uv[3], 0);
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m_geometry.SetIndices(indices, 6, 6 * i);
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// TODO: change to lower value(or ideally remove completely) to avoid overlapping and make less space between symbols
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// when setting for depth comparison operator will be available( <= )
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cursorX += info.advance + 0.08;
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if (firstGlyph)
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{
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bmin.x = m_geometry.vertices[vIdx].position.x;
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firstGlyph = false;
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}
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bmax.x = std::max(bmax.x, m_geometry.vertices[vIdx + 1].position.x);
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bmax.y = std::max(bmax.y, m_geometry.vertices[vIdx + 2].position.y);
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bmin.y = std::min(bmin.y, m_geometry.vertices[vIdx + 1].position.y);
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++i;
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}
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m_bbox.Init(bmin, bmax);
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SimpleDrawable::Init(nullptr, &m_geometry, &m_material, &m_uniBuffer);
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}
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void TextDrawable::SetAtlasData(const std::shared_ptr<AtlasData>& atlasData)
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{
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if (!atlasData || atlasData->glyphs.empty() || !atlasData->texture.textureBuffer)
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{
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throw std::runtime_error("Cannot initialize text drawable with empty atlas data");
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}
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m_atlasData = atlasData;
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}
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} |