Method TextRenderer

Source/Falcor/Utils/UI/TextRenderer.cpp:69–109

} // namespace

TextRenderer::TextRenderer(ref<Device> pDevice) : mpDevice(pDevice)
{
    for (uint32_t i = 0; i < kVaoCount; ++i)
    {
        // Create a vertex buffer
        const uint32_t vbSize = (uint32_t)(sizeof(Vertex) * kMaxCharCount * std::size(kVertexPos));
        ref<Buffer> pVb = mpDevice->createBuffer(vbSize, ResourceBindFlags::Vertex, MemoryType::Upload, nullptr);
        mpVaos[i] = createVAO(pVb);
    }

    // Create the RenderState
    mpPass = RasterPass::create(mpDevice, "Utils/UI/TextRenderer.3d.slang", "vsMain", "psMain");
    auto& pState = mpPass->getState();

    // create the depth-state
    DepthStencilState::Desc dsDesc;
    dsDesc.setDepthEnabled(false);
    pState->setDepthStencilState(DepthStencilState::create(dsDesc));

    // Rasterizer state
    RasterizerState::Desc rsState;
    rsState.setCullMode(RasterizerState::CullMode::None);
    pState->setRasterizerState(RasterizerState::create(rsState));

    // Blend state
    BlendState::Desc blendDesc;
    blendDesc.setRtBlend(0, true).setRtParams(
        0,
        BlendState::BlendOp::Add,
        BlendState::BlendOp::Add,
        BlendState::BlendFunc::SrcAlpha,
        BlendState::BlendFunc::OneMinusSrcAlpha,
        BlendState::BlendFunc::One,
        BlendState::BlendFunc::One
    );
    pState->setBlendState(BlendState::create(blendDesc));
    mpFont = std::make_unique<Font>(mpDevice, getRuntimeDirectory() / "data/framework/fonts/dejavu-sans-mono-14");

    // Initialize the buffer
    mpPass->getRootVar()["gFontTex"] = mpFont->getTexture();
}

TextRenderer::~TextRenderer() = default;