Method NullContext

engine/graphics/src/null/graphics_null.cpp:73–137

    }

    NullContext::NullContext(const ContextParams& params)
    {
        memset(this, 0, sizeof(*this));
        m_BaseContext.m_DefaultTextureMinFilter = params.m_DefaultTextureMinFilter;
        m_BaseContext.m_DefaultTextureMagFilter = params.m_DefaultTextureMagFilter;
        m_BaseContext.m_Width                   = params.m_Width;
        m_BaseContext.m_Height                  = params.m_Height;
        m_BaseContext.m_Window                  = params.m_Window;
        m_BaseContext.m_PrintDeviceInfo         = params.m_PrintDeviceInfo;
        m_JobContext              = params.m_JobContext;

        // We need to have some sort of valid default filtering
        if (m_BaseContext.m_DefaultTextureMinFilter == TEXTURE_FILTER_DEFAULT)
            m_BaseContext.m_DefaultTextureMinFilter = TEXTURE_FILTER_LINEAR;
        if (m_BaseContext.m_DefaultTextureMagFilter == TEXTURE_FILTER_DEFAULT)
            m_BaseContext.m_DefaultTextureMagFilter = TEXTURE_FILTER_LINEAR;

        for (int i = 0; i < MAX_TEXTURE_COUNT; ++i)
        {
            m_Samplers[i].m_MinFilter = m_BaseContext.m_DefaultTextureMinFilter;
            m_Samplers[i].m_MagFilter = m_BaseContext.m_DefaultTextureMagFilter;
        }

        assert(dmPlatform::GetWindowStateParam(m_BaseContext.m_Window, WINDOW_STATE_OPENED));

        m_BaseContext.m_TextureFormatSupport |= 1ULL << TEXTURE_FORMAT_LUMINANCE;
        m_BaseContext.m_TextureFormatSupport |= 1ULL << TEXTURE_FORMAT_LUMINANCE_ALPHA;
        m_BaseContext.m_TextureFormatSupport |= 1ULL << TEXTURE_FORMAT_RGB;
        m_BaseContext.m_TextureFormatSupport |= 1ULL << TEXTURE_FORMAT_RGBA;
        m_BaseContext.m_TextureFormatSupport |= 1ULL << TEXTURE_FORMAT_RGB_16BPP;
        m_BaseContext.m_TextureFormatSupport |= 1ULL << TEXTURE_FORMAT_RGBA_16BPP;
        m_BaseContext.m_TextureFormatSupport |= 1ULL << TEXTURE_FORMAT_RGB_ETC1;
        m_BaseContext.m_TextureFormatSupport |= 1ULL << TEXTURE_FORMAT_RGBA32F;

        // Synthetic limits for the null adapter — these are not queried from any
        // hardware, just generous defaults that roughly mirror Vulkan / D3D12
        // Feature Level 11_0 guarantees so test code can assume a baseline
        // modern profile.
        GraphicsContextLimits& limits = m_BaseContext.m_Limits;
        limits.m_MaxTextureSize2D                = 16384;
        limits.m_MaxTextureSize3D                = 2048;
        limits.m_MaxTextureSizeCube              = 16384;
        limits.m_MaxTextureArrayLayers           = 2048;

        limits.m_MaxFramebufferWidth             = 16384;
        limits.m_MaxFramebufferHeight            = 16384;
        limits.m_MaxColorAttachments             = 8;

        limits.m_MaxSamplersPerStage             = 16;
        limits.m_MaxTexturesPerStage             = 32;
        limits.m_MaxVertexAttributes             = 16;
        limits.m_MaxVertexBuffers                = 16;

        limits.m_MaxComputeWorkgroupSizeX        = 1024;
        limits.m_MaxComputeWorkgroupSizeY        = 1024;
        limits.m_MaxComputeWorkgroupSizeZ        = 64;
        limits.m_MaxComputeWorkgroupInvocations  = 1024;
        limits.m_MaxComputeSharedMemorySize      = 32 * 1024;