Function Draw

engine/render/src/render/render.cpp:1167–1306

NOTE: Currently only used externally in 1 test (fontview.cpp) TODO: Replace that occurrance with DrawRenderList

    // NOTE: Currently only used externally in 1 test (fontview.cpp)
    // TODO: Replace that occurrance with DrawRenderList
    Result Draw(HRenderContext render_context, HPredicate predicate, HNamedConstantBuffer constant_buffer)
    {
        if (render_context == 0x0)
        {
            return RESULT_INVALID_CONTEXT;
        }

        dmGraphics::HContext context = dmRender::GetGraphicsContext(render_context);
        dmGraphics::HTexture render_context_textures[RenderObject::MAX_TEXTURE_COUNT] = {};

        HMaterial material         = render_context->m_Material;
        HMaterial context_material = render_context->m_Material;

        if(context_material)
        {
            dmGraphics::EnableProgram(context, GetMaterialProgram(context_material));
            GetRenderContextTextures(render_context, context_material->m_Samplers, render_context_textures);
        }

        dmGraphics::PipelineState ps_orig = dmGraphics::GetPipelineState(context);

        for (uint32_t i = 0; i < render_context->m_RenderObjects.Size(); ++i)
        {
            RenderObject* ro = render_context->m_RenderObjects[i];
            if (ro->m_VertexCount == 0)
                continue;

            MaterialTagList taglist;
            uint32_t taglistkey = dmRender::GetMaterialTagListKey(ro->m_Material);
            dmRender::GetMaterialTagList(render_context, taglistkey, &taglist);

            if (predicate && !dmRender::MatchMaterialTags(taglist.m_Count, taglist.m_Tags, predicate->m_TagCount, predicate->m_Tags))
            {
                continue;
            }

            if (!context_material)
            {
                if(material != ro->m_Material)
                {
                    material = ro->m_Material;
                    dmGraphics::EnableProgram(context, GetMaterialProgram(material));

                    // Reset the override texture binding array. The new material may have a different
                    // resource layout than the current material.
                    memset(render_context_textures, 0, sizeof(render_context_textures));
                    GetRenderContextTextures(render_context, material->m_Samplers, render_context_textures);
                }
            }

            ApplyMaterialConstants(render_context, material, ro);

            if (ro->m_ConstantBuffer) // from components/scripts
                ApplyNamedConstantBuffer(render_context, material, ro->m_ConstantBuffer);

            if (constant_buffer) // from render script
                ApplyNamedConstantBuffer(render_context, material, constant_buffer);