Method drawCallCommon

Source/Falcor/Core/API/RenderContext.cpp:649–707

}

gfx::IRenderCommandEncoder* RenderContext::drawCallCommon(GraphicsState* pState, ProgramVars* pVars)
{
    // Insert barriers for bound resources.
    pVars->prepareDescriptorSets(this);

    // Insert barriers for render targets.
    ensureFboAttachmentResourceStates(this, pState->getFbo().get());

    // Insert barriers for vertex/index buffers.
    auto pGso = pState->getGSO(pVars).get();
    if (pGso != mpLastBoundGraphicsStateObject)
    {
        auto pVao = pState->getVao().get();
        for (uint32_t i = 0; i < pVao->getVertexBuffersCount(); i++)
        {
            auto vertexBuffer = pVao->getVertexBuffer(i).get();
            resourceBarrier(vertexBuffer, Resource::State::VertexBuffer);
        }
        if (pVao->getIndexBuffer())
        {
            auto indexBuffer = pVao->getIndexBuffer().get();
            resourceBarrier(indexBuffer, Resource::State::IndexBuffer);
        }
    }

    bool isNewEncoder = false;
    auto encoder = getLowLevelData()->getRenderCommandEncoder(
        pGso->getGFXRenderPassLayout(), pState->getFbo() ? pState->getFbo()->getGfxFramebuffer() : nullptr, isNewEncoder
    );

    FALCOR_GFX_CALL(encoder->bindPipelineWithRootObject(pGso->getGfxPipelineState(), pVars->getShaderObject()));

    if (isNewEncoder || pGso != mpLastBoundGraphicsStateObject)
    {
        mpLastBoundGraphicsStateObject = pGso;
        auto pVao = pState->getVao().get();
        auto pVertexLayout = pVao->getVertexLayout().get();
        for (uint32_t i = 0; i < pVao->getVertexBuffersCount(); i++)
        {
            auto bufferLayout = pVertexLayout->getBufferLayout(i);
            auto vertexBuffer = pVao->getVertexBuffer(i).get();
            encoder->setVertexBuffer(i, pVao->getVertexBuffer(i)->getGfxBufferResource(), bufferLayout->getElementOffset(0));
        }
        if (pVao->getIndexBuffer())
        {
            auto indexBuffer = pVao->getIndexBuffer().get();
            encoder->setIndexBuffer(indexBuffer->getGfxBufferResource(), getGFXFormat(pVao->getIndexBufferFormat()));
        }
        encoder->setPrimitiveTopology(getGFXPrimitiveTopology(pVao->getPrimitiveTopology()));
        encoder->setViewports(
            (uint32_t)pState->getViewports().size(), reinterpret_cast<const gfx::Viewport*>(pState->getViewports().data())
        );
        encoder->setScissorRects(
            (uint32_t)pState->getScissors().size(), reinterpret_cast<const gfx::ScissorRect*>(pState->getScissors().data())
        );
    }

    return encoder;