TexturesGLES30.h

#pragma once
 
#include "../Base/TexturesCommon.h"
 
#include "CommonGLES30.h"
 
namespace Cogs
{
  struct ContextGLES30;
  struct CapabilitiesGLES30;
 
  struct TextureGLES30
  {
    // Resources, needs to be released
    GLuint textureId;
    GLuint renderBuffer;
    GLuint fbo;     // Temporary FBO for reading
 
    // GL_TEXTURE_2D, GL_TEXTURE_2D_ARRAY, GL_TEXTURE_3D or GL_TEXTURE_2D_MULTISAMPLE (which implies renderbuffer and not texture).
    GLenum target;
    uint32_t width;
    uint32_t height;
    uint32_t depth;
 
    uint32_t estimatedByteSize;    // bytesize
 
    uint32_t flags;
    TextureFormat format;
    uint8_t numSamples;
 
    struct {
      unsigned short boundAsView : 1;   
      unsigned short hasMipmaps : 1;
      unsigned short cubeMap : 1;
    };
 
  };
 
  struct SamplerGLES30
  {
    GLuint glName = 0;
  };
 
  struct TexturesGLES30 : public TexturesCommon
  {
 
    void initialize(ContextGLES30* context, CapabilitiesGLES30* caps) { this->context = context;  this->caps = caps; }
 
    TextureHandle loadTexture(const TextureDescription & desc, const TextureData * data);
    void uploadTextureData(TextureGLES30& tex, const TextureData& data, uint32_t layer_offset, uint32_t face_offset, uint32_t level_offset);
    void uploadTextureData(TextureHandle textureHandle, const TextureData& data, uint32_t layer_offset, uint32_t face_offset, uint32_t level_offset) override;
    void releaseTexture(TextureHandle textureHandle);
 
    void releaseNativeTexture(TextureNativeHandle nativeHandle) override;
 
    SamplerStateHandle loadSamplerState(const SamplerState & state);
    void releaseSamplerState(SamplerStateHandle handle);
 
    TextureViewHandle createTextureView(TextureViewDescription & viewDescription) override;
    void releaseTextureView(const TextureViewHandle & handle) override;
    void * getNativeHandle(TextureHandle textureHandle) override;
 
    void generateMipmaps(TextureHandle texureHandle);
 
    void releaseResources();
 
    size_t textureMemoryConsumption = 0;
    ResourceMap<TextureHandle, TextureGLES30> textures;
    ResourceMap<TextureViewHandle, TextureViewDescription> views;
    ResourceMap<SamplerStateHandle, SamplerGLES30> samplers;
 
  protected:
    friend struct ContextGLES30;
 
    void defineTextureData(TextureGLES30* tex, GLuint textureLevels);
 
  private:
    ContextGLES30* context = nullptr;
    CapabilitiesGLES30* caps = nullptr;
  };
}