RenderTargetsGLES30.h

#pragma once
 
#include "../IRenderTargets.h"
 
#include "CommonGLES30.h"
 
namespace Cogs
{
  struct TexturesGLES30;
  struct CapabilitiesGLES30;
 
  namespace OpenGLES30
  {
    const static size_t kMaxRenderTargets = 8;
  }
 
  struct MultiViewGLES30
  {
    uint8_t samples;
    uint8_t baseIndex : 4;
    uint8_t count : 4;
  };
 
  struct RenderTargetViewDataGLES30
  {
    uint8_t basicType : 2;  // 0 -> undefined, 1->float, 2->uint, 3->int
  };
 
  struct RenderTargetGLES30
  {
    RenderTargetViewDescription views[OpenGLES30::kMaxRenderTargets] = {};
    GLuint fbo = 0;
    RenderTargetViewDataGLES30 viewData[OpenGLES30::kMaxRenderTargets] = {};
    MultiViewGLES30 multiView;
    uint8_t numViews : 7;
    uint8_t broken : 1;
  };
 
  struct DepthStencilTargetGLES30
  {
    RenderTargetHandle renderTarget = RenderTargetHandle::NoHandle;
    DepthStencilViewDescription view = {};
    GLuint renderBuffer = 0;
    GLuint fbo = 0;
    MultiViewGLES30 multiView;
    uint8_t broken : 1;
  };
 
 
  struct RenderTargetsGLES30 : IRenderTargets
  {
    void initialize(CapabilitiesGLES30* caps,  TexturesGLES30 * textures) {
      this->caps = caps;
      this->textures = textures;
    };
 
    void releaseRenderTarget(RenderTargetHandle renderTargetHandle) override;
 
    DepthStencilHandle createDepthStencilTarget(const RenderTargetHandle handle) override;
    DepthStencilHandle createDepthStencilTarget(const RenderTargetHandle handle, const TextureHandle textureHandle) override;
    void releaseDepthStencilTarget(DepthStencilHandle depthStencilHandle) override;
 
    DepthStencilStateHandle loadDepthStencilState(const DepthStencilState & depthStencilState) override;
    void releaseDepthStencilState(DepthStencilStateHandle handle) override;
 
    RasterizerStateHandle loadRasterizerState(const RasterizerState & rasterizerState) override;
    void releaseRasterizerState(RasterizerStateHandle handle) override;
    
    BlendStateHandle loadBlendState(const BlendState & blendState) override;
    BlendStateHandle loadBlendState(const BlendState& blendStateColor, const BlendState& blendStateAlpha) override;
    void releaseBlendState(BlendStateHandle handle) override;
 
    void releaseResources() override;
 
    // Internal API
 
    bool bindRenderTargets(RenderTargetHandle renderTargetHandle, DepthStencilHandle depthStencilHandle);
 
    ResourceMap<BlendStateHandle, BlendStateGLES30> blendStates;
    ResourceMap<RasterizerStateHandle, RasterizerState> rasterizerStates;
    ResourceMap<DepthStencilStateHandle, DepthStencilState> depthStencilStates;
 
    ResourceMap<RenderTargetHandle, RenderTargetGLES30> renderTargets;
    ResourceMap<DepthStencilHandle, DepthStencilTargetGLES30> depthStencils;
 
    // Inherited via IRenderTargets
    virtual RenderTargetHandle createRenderTarget(const RenderTargetViewDescription * renderTargetViews, const size_t numViews) override;
    virtual DepthStencilHandle createDepthStencilTarget(const RenderTargetHandle handle, const DepthStencilViewDescription & depthStencilView) override;
    virtual RenderTargetHandle createRenderTarget(const RenderTargetViewDescription* renderTargetViews, const size_t numViews, const MultiViewDescription& multiView) override;
    virtual DepthStencilHandle createDepthStencilTarget(const RenderTargetHandle handle, const DepthStencilViewDescription& depthStencilView, const MultiViewDescription& multiView) override;
 
  private:
    TexturesGLES30* textures = nullptr;
    CapabilitiesGLES30* caps = nullptr;
  };
}