ProceduralTextureNode.cpp

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#include "ProceduralTextureNode.hpp"
 
#include "MayaFlux/Journal/Archivist.hpp"
 
namespace MayaFlux::Nodes::GpuSync {
 
const auto default_generator = [](uint32_t, uint32_t, uint32_t, uint32_t) {
    return glm::vec4(0.0F, 0.0F, 0.0F, 1.0F);
};
 
ProceduralTextureNode::ProceduralTextureNode(uint32_t width, uint32_t height)
    : ProceduralTextureNode(width, height, default_generator)
{
}
 
ProceduralTextureNode::ProceduralTextureNode(
    uint32_t width,
    uint32_t height,
    PixelGenerator generator)
    : TextureNode(width, height)
    , m_generator(std::move(generator))
{
    if (!m_generator) {
        MF_WARN(Journal::Component::Nodes, Journal::Context::NodeProcessing,
            "ProceduralTextureNode created with null generator, using default black");
        m_generator = default_generator;
    }
 
    MF_DEBUG(Journal::Component::Nodes, Journal::Context::NodeProcessing,
        "Created ProceduralTextureNode: {}x{}", width, height);
}
 
void ProceduralTextureNode::set_generator(PixelGenerator generator)
{
    if (!generator) {
        MF_ERROR(Journal::Component::Nodes, Journal::Context::NodeProcessing,
            "Cannot set null generator");
        return;
    }
 
    m_generator = std::move(generator);
    m_pixel_data_dirty = true;
 
    MF_DEBUG(Journal::Component::Nodes, Journal::Context::NodeProcessing,
        "ProceduralTextureNode: generator function updated");
}
 
void ProceduralTextureNode::compute_frame()
{
    if (!m_generator) {
        MF_RT_ERROR(Journal::Component::Nodes, Journal::Context::NodeProcessing,
            "ProceduralTextureNode: no generator function set");
        return;
    }
 
    auto buffer = get_pixel_buffer_mutable();
 
    for (uint32_t y = 0; y < m_height; ++y) {
        for (uint32_t x = 0; x < m_width; ++x) {
            size_t idx = (static_cast<size_t>(y * m_width + x)) * 4;
 
            glm::vec4 color = m_generator(x, y, m_width, m_height);
 
            buffer[idx + 0] = color.r;
            buffer[idx + 1] = color.g;
            buffer[idx + 2] = color.b;
            buffer[idx + 3] = color.a;
        }
    }
 
    m_pixel_data_dirty = true;
 
    MF_TRACE(Journal::Component::Nodes, Journal::Context::NodeProcessing,
        "ProceduralTextureNode: generated {}x{} pixels",
        m_width, m_height);
}
 
} // namespace MayaFlux::Nodes::GpuSync