10 Specifying pipeline blend state.cpp

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// Vulkan Cookbook
// ISBN: 9781786468154
// © Packt Publishing Limited
//
// Author:   Pawel Lapinski
// LinkedIn: https://www.linkedin.com/in/pawel-lapinski-84522329
//
// Chapter: 08 Graphics and Compute Pipelines
// Recipe:  10 Specifying pipeline blend state

#include "08 Graphics and Compute Pipelines/10 Specifying pipeline blend state.h"

namespace VulkanCookbook {

  void SpecifyPipelineBlendState( bool                                                     logic_op_enable,
                                  VkLogicOp                                                logic_op,
                                  std::vector<VkPipelineColorBlendAttachmentState> const & attachment_blend_states,
                                  std::array<float, 4> const                             & blend_constants,
                                  VkPipelineColorBlendStateCreateInfo                    & blend_state_create_info ) {
    blend_state_create_info = {
      VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO,   // VkStructureType                              sType
      nullptr,                                                    // const void                                 * pNext
      0,                                                          // VkPipelineColorBlendStateCreateFlags         flags
      logic_op_enable,                                            // VkBool32                                     logicOpEnable
      logic_op,                                                   // VkLogicOp                                    logicOp
      static_cast<uint32_t>(attachment_blend_states.size()),      // uint32_t                                     attachmentCount
      attachment_blend_states.data(),                             // const VkPipelineColorBlendAttachmentState  * pAttachments
      {                                                           // float                                        blendConstants[4]
        blend_constants[0],
        blend_constants[1],
        blend_constants[2],
        blend_constants[3]
      }
    };
  }

} // namespace VulkanCookbook