GraphicsPipeline.h

#pragma once
 
/* <editor-fold desc="MIT License">
 
Copyright(c) 2018 Robert Osfield
 
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
</editor-fold> */
 
#include <vsg/state/PipelineLayout.h>
#include <vsg/state/ShaderStage.h>
#include <vsg/state/StateCommand.h>
#include <vsg/vk/RenderPass.h>
 
namespace vsg
{
    // forward declare
    class Context;

    class VSG_DECLSPEC GraphicsPipelineState : public Inherit<StateCommand, GraphicsPipelineState>
    {
    public:
        GraphicsPipelineState() {}
        GraphicsPipelineState(const GraphicsPipelineState& gp) :
            Inherit(), mask(gp.mask) {}

        Mask mask = MASK_ALL;
 
        virtual void apply(Context& context, VkGraphicsPipelineCreateInfo& pipelineInfo) const = 0;
        void record(CommandBuffer&) const override {};
 
    public:
        int compare(const Object& rhs) const override;
        void read(Input& input) override;
        void write(Output& output) const override;
 
    protected:
        virtual ~GraphicsPipelineState() {}
    };
    VSG_type_name(vsg::GraphicsPipelineState);
 
    using GraphicsPipelineStates = std::vector<ref_ptr<GraphicsPipelineState>>;
    extern VSG_DECLSPEC void mergeGraphicsPipelineStates(Mask mask, GraphicsPipelineStates& dest_PipelineStates, ref_ptr<GraphicsPipelineState> src_PipelineState);
    extern VSG_DECLSPEC void mergeGraphicsPipelineStates(Mask mask, GraphicsPipelineStates& dest_PipelineStates, const GraphicsPipelineStates& src_PipelineStates);

    class VSG_DECLSPEC GraphicsPipeline : public Inherit<Object, GraphicsPipeline>
    {
    public:
        GraphicsPipeline();
 
        GraphicsPipeline(PipelineLayout* pipelineLayout, const ShaderStages& shaderStages, const GraphicsPipelineStates& pipelineStates, uint32_t subpass = 0);

        VkPipeline vk(uint32_t viewID) const { return _implementation[viewID]->_pipeline; }

        VkPipeline validated_vk(uint32_t viewID) const { return (viewID < _implementation.size()) ? (_implementation[viewID] ? _implementation[viewID]->_pipeline : 0) : 0; }

        ShaderStages stages;
        GraphicsPipelineStates pipelineStates;
        ref_ptr<PipelineLayout> layout;
        uint32_t subpass;
 
        int compare(const Object& rhs_object) const override;
 
        void read(Input& input) override;
        void write(Output& output) const override;
 
        // compile the Vulkan object, context parameter used for Device
        void compile(Context& context);
 
        // remove the local reference to the Vulkan implementation
        void release(uint32_t viewID)
        {
            if (viewID < static_cast<uint32_t>(_implementation.size())) _implementation[viewID] = {};
        }
        void release() { _implementation.clear(); }
 
    protected:
        virtual ~GraphicsPipeline();
 
        struct Implementation : public Inherit<Object, Implementation>
        {
            Implementation(Context& context, Device* device, const RenderPass* renderPass, const PipelineLayout* pipelineLayout, const ShaderStages& shaderStages, const GraphicsPipelineStates& pipelineStates, uint32_t subpass);
 
            virtual ~Implementation();
 
            GraphicsPipelineStates _pipelineStates;
            VkPipeline _pipeline;
 
            ref_ptr<Device> _device;
        };
 
        std::vector<ref_ptr<Implementation>> _implementation;
    };
    VSG_type_name(vsg::GraphicsPipeline);

    class VSG_DECLSPEC BindGraphicsPipeline : public Inherit<StateCommand, BindGraphicsPipeline>
    {
    public:
        explicit BindGraphicsPipeline(ref_ptr<GraphicsPipeline> in_pipeline = {});

        ref_ptr<GraphicsPipeline> pipeline;
 
        int compare(const Object& rhs_object) const override;
 
        void read(Input& input) override;
        void write(Output& output) const override;
 
        void record(CommandBuffer& commandBuffer) const override;
 
        // compile the Vulkan object, context parameter used for Device
        void compile(Context& context) override;
 
        virtual void release();
 
    public:
        virtual ~BindGraphicsPipeline();
    };
    VSG_type_name(vsg::BindGraphicsPipeline);
 
} // namespace vsg