setup_rendering()

void MayaFlux::Buffers::FormaBuffer::setup_rendering

(

const RenderConfig &

config

)

Attach a RenderProcessor targeting the given window.

Selects default shaders based on topology set at construction. Always enables alpha blending and disables depth testing. Caller may override shaders via config fields.

Definition at line 54 of file FormaBuffer.cpp.

{
    RenderConfig resolved = config;
    resolved.topology = m_topology;
 
    const bool single_tex = !config.default_texture_binding.empty();
    const auto multi_count = static_cast<uint32_t>(config.additional_textures.size());
    const bool multi_tex = multi_count > 0;
 
    switch (resolved.topology) {
    case Portal::Graphics::PrimitiveTopology::POINT_LIST:
        if (resolved.vertex_shader.empty())
            resolved.vertex_shader = "point.vert.spv";
        if (resolved.fragment_shader.empty())
            resolved.fragment_shader = "point.frag.spv";
        break;
 
    case Portal::Graphics::PrimitiveTopology::LINE_LIST:
    case Portal::Graphics::PrimitiveTopology::LINE_STRIP:
        if (resolved.vertex_shader.empty())
            resolved.vertex_shader = "line.vert.spv";
        if (resolved.fragment_shader.empty())
            resolved.fragment_shader = "line.frag.spv";
#ifndef MAYAFLUX_PLATFORM_MACOS
        if (resolved.geometry_shader.empty())
            resolved.geometry_shader = "line.geom.spv";
#else
        resolved.topology = Portal::Graphics::PrimitiveTopology::TRIANGLE_LIST;
#endif
 
        break;
 
    case Portal::Graphics::PrimitiveTopology::TRIANGLE_LIST:
    case Portal::Graphics::PrimitiveTopology::TRIANGLE_STRIP:
        if (resolved.vertex_shader.empty())
            resolved.vertex_shader = multi_tex ? "triangle_multi.vert.spv" : "triangle.vert.spv";
        if (resolved.fragment_shader.empty()) {
            if (multi_tex) {
                resolved.fragment_shader = "forma_multi.frag.spv";
            } else if (single_tex) {
                resolved.fragment_shader = "forma_textured.frag.spv";
            } else {
                resolved.fragment_shader = "triangle.frag.spv";
            }
        }
        break;
 
    default:
        if (resolved.vertex_shader.empty())
            resolved.vertex_shader = "point.vert.spv";
        if (resolved.fragment_shader.empty())
            resolved.fragment_shader = "point.frag.spv";
        break;
    }
 
    ShaderConfig sc { resolved.vertex_shader };
    if (multi_tex) {
        const uint32_t total = single_tex ? 1 + multi_count : multi_count;
        sc.bindings["textures"] = ShaderBinding(
            0, 1, vk::DescriptorType::eCombinedImageSampler, total);
    } else if (single_tex) {
        sc.bindings[config.default_texture_binding] = ShaderBinding(
            0, 1, vk::DescriptorType::eCombinedImageSampler);
    }
 
    apply_render_config(resolved, sc);
    m_render_processor->enable_alpha_blending();
 
    if (multi_tex) {
        uint32_t slot = 1;
        if (single_tex && !config.default_texture_binding.empty()) {
            auto it = std::ranges::find_if(config.additional_textures,
                [&](const auto& p) { return p.first == config.default_texture_binding; });
            if (it != config.additional_textures.end()) {
                m_render_processor->bind_texture(slot, it->second);
                ++slot;
            }
        }
        for (const auto& [name, img] : config.additional_textures) {
            if (single_tex && name == config.default_texture_binding)
                continue;
 
            if (img)
                m_render_processor->bind_texture(slot, img);
 
            ++slot;
        }
    }
 
    get_processing_chain()->add_final_processor(m_render_processor, shared_from_this());
    set_default_render_config(resolved);
}

References MayaFlux::Portal::Graphics::RenderConfig::additional_textures, MayaFlux::Buffers::VKBuffer::apply_render_config(), MayaFlux::Portal::Graphics::RenderConfig::default_texture_binding, MayaFlux::Portal::Graphics::RenderConfig::fragment_shader, MayaFlux::Portal::Graphics::RenderConfig::geometry_shader, MayaFlux::Buffers::VKBuffer::get_processing_chain(), MayaFlux::Portal::Graphics::LINE_LIST, MayaFlux::Portal::Graphics::LINE_STRIP, MayaFlux::Buffers::VKBuffer::m_render_processor, m_topology, MayaFlux::Portal::Graphics::POINT_LIST, MayaFlux::Buffers::VKBuffer::set_default_render_config(), MayaFlux::Portal::Graphics::RenderConfig::topology, MayaFlux::Portal::Graphics::TRIANGLE_LIST, MayaFlux::Portal::Graphics::TRIANGLE_STRIP, and MayaFlux::Portal::Graphics::RenderConfig::vertex_shader.

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