1 files changed, 144 insertions, 0 deletions
diff --git a/xbmc/guilib/Texture.h b/xbmc/guilib/Texture.h
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+++ b/xbmc/guilib/Texture.h
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+/*
+ *  Copyright (C) 2005-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#pragma once
+
+#include "guilib/TextureFormats.h"
+
+#include <cstddef>
+#include <memory>
+#include <string>
+
+class IImage;
+
+
+#pragma pack(1)
+struct COLOR {unsigned char b,g,r,x;};	// Windows GDI expects 4bytes per color
+#pragma pack()
+
+enum class TEXTURE_SCALING
+{
+  LINEAR,
+  NEAREST,
+};
+
+/*!
+\ingroup textures
+\brief Base texture class, subclasses of which depend on the render spec (DX, GL etc.)
+*/
+class CTexture
+{
+
+public:
+  CTexture(unsigned int width = 0, unsigned int height = 0, unsigned int format = XB_FMT_A8R8G8B8);
+  virtual ~CTexture();
+
+  static std::unique_ptr<CTexture> CreateTexture(unsigned int width = 0,
+                                                 unsigned int height = 0,
+                                                 unsigned int format = XB_FMT_A8R8G8B8);
+
+  /*! \brief Load a texture from a file
+   Loads a texture from a file, restricting in size if needed based on maxHeight and maxWidth.
+   Note that these are the ideal size to load at - the returned texture may be smaller or larger than these.
+   \param texturePath the path of the texture to load.
+   \param idealWidth the ideal width of the texture (defaults to 0, no ideal width).
+   \param idealHeight the ideal height of the texture (defaults to 0, no ideal height).
+   \param strMimeType mimetype of the given texture if available (defaults to empty)
+   \return a CTexture std::unique_ptr to the created texture - nullptr if the texture failed to load.
+   */
+  static std::unique_ptr<CTexture> LoadFromFile(const std::string& texturePath,
+                                                unsigned int idealWidth = 0,
+                                                unsigned int idealHeight = 0,
+                                                bool requirePixels = false,
+                                                const std::string& strMimeType = "");
+
+  /*! \brief Load a texture from a file in memory
+   Loads a texture from a file in memory, restricting in size if needed based on maxHeight and maxWidth.
+   Note that these are the ideal size to load at - the returned texture may be smaller or larger than these.
+   \param buffer the memory buffer holding the file.
+   \param bufferSize the size of buffer.
+   \param mimeType the mime type of the file in buffer.
+   \param idealWidth the ideal width of the texture (defaults to 0, no ideal width).
+   \param idealHeight the ideal height of the texture (defaults to 0, no ideal height).
+   \return a CTexture std::unique_ptr to the created texture - nullptr if the texture failed to load.
+   */
+  static std::unique_ptr<CTexture> LoadFromFileInMemory(unsigned char* buffer,
+                                                        size_t bufferSize,
+                                                        const std::string& mimeType,
+                                                        unsigned int idealWidth = 0,
+                                                        unsigned int idealHeight = 0);
+
+  bool LoadFromMemory(unsigned int width, unsigned int height, unsigned int pitch, unsigned int format, bool hasAlpha, const unsigned char* pixels);
+  bool LoadPaletted(unsigned int width, unsigned int height, unsigned int pitch, unsigned int format, const unsigned char *pixels, const COLOR *palette);
+
+  bool HasAlpha() const;
+
+  void SetMipmapping();
+  bool IsMipmapped() const;
+  void SetScalingMethod(TEXTURE_SCALING scalingMethod) { m_scalingMethod = scalingMethod; }
+  TEXTURE_SCALING GetScalingMethod() const { return m_scalingMethod; }
+  void SetCacheMemory(bool bCacheMemory) { m_bCacheMemory = bCacheMemory; }
+  bool GetCacheMemory() const { return m_bCacheMemory; }
+
+  virtual void CreateTextureObject() = 0;
+  virtual void DestroyTextureObject() = 0;
+  virtual void LoadToGPU() = 0;
+  virtual void BindToUnit(unsigned int unit) = 0;
+
+  unsigned char* GetPixels() const { return m_pixels; }
+  unsigned int GetPitch() const { return GetPitch(m_textureWidth); }
+  unsigned int GetRows() const { return GetRows(m_textureHeight); }
+  unsigned int GetTextureWidth() const { return m_textureWidth; }
+  unsigned int GetTextureHeight() const { return m_textureHeight; }
+  unsigned int GetWidth() const { return m_imageWidth; }
+  unsigned int GetHeight() const { return m_imageHeight; }
+  /*! \brief return the original width of the image, before scaling/cropping */
+  unsigned int GetOriginalWidth() const { return m_originalWidth; }
+  /*! \brief return the original height of the image, before scaling/cropping */
+  unsigned int GetOriginalHeight() const { return m_originalHeight; }
+
+  int GetOrientation() const { return m_orientation; }
+  void SetOrientation(int orientation) { m_orientation = orientation; }
+
+  void Update(unsigned int width, unsigned int height, unsigned int pitch, unsigned int format, const unsigned char *pixels, bool loadToGPU);
+  void Allocate(unsigned int width, unsigned int height, unsigned int format);
+  void ClampToEdge();
+
+  static unsigned int PadPow2(unsigned int x);
+  static bool SwapBlueRed(unsigned char *pixels, unsigned int height, unsigned int pitch, unsigned int elements = 4, unsigned int offset=0);
+
+private:
+  // no copy constructor
+  CTexture(const CTexture& copy) = delete;
+
+protected:
+  bool LoadFromFileInMem(unsigned char* buffer, size_t size, const std::string& mimeType,
+                         unsigned int maxWidth, unsigned int maxHeight);
+  bool LoadFromFileInternal(const std::string& texturePath, unsigned int maxWidth, unsigned int maxHeight, bool requirePixels, const std::string& strMimeType = "");
+  bool LoadIImage(IImage* pImage, unsigned char* buffer, unsigned int bufSize, unsigned int width, unsigned int height);
+  // helpers for computation of texture parameters for compressed textures
+  unsigned int GetPitch(unsigned int width) const;
+  unsigned int GetRows(unsigned int height) const;
+  unsigned int GetBlockSize() const;
+
+  unsigned int m_imageWidth;
+  unsigned int m_imageHeight;
+  unsigned int m_textureWidth;
+  unsigned int m_textureHeight;
+  unsigned int m_originalWidth;   ///< original image width before scaling or cropping
+  unsigned int m_originalHeight;  ///< original image height before scaling or cropping
+
+  unsigned char* m_pixels;
+  bool m_loadedToGPU;
+  unsigned int m_format;
+  int m_orientation;
+  bool m_hasAlpha =  true ;
+  bool m_mipmapping =  false ;
+  TEXTURE_SCALING m_scalingMethod = TEXTURE_SCALING::LINEAR;
+  bool m_bCacheMemory = false;
+};