source/Irrlicht/CImageLoaderBMP.h

   1 // Copyright (C) 2002-2012 Nikolaus Gebhardt\r
   2 // This file is part of the "Irrlicht Engine".\r
   3 // For conditions of distribution and use, see copyright notice in irrlicht.h\r
   4 \r
   5 #ifndef __C_IMAGE_LOADER_BMP_H_INCLUDED__\r
   6 #define __C_IMAGE_LOADER_BMP_H_INCLUDED__\r
   7 \r
   8 #include "IrrCompileConfig.h"\r
   9 \r
  10 #include "IImageLoader.h"\r
  11 \r
  12 \r
  13 namespace irr\r
  14 {\r
  15 namespace video\r
  16 {\r
  17 \r
  18 // byte-align structures\r
  19 #include "irrpack.h"\r
  20 \r
  21         struct SBMPHeader\r
  22         {\r
  23                 u16     Id;                                     //      BM - Windows 3.1x, 95, NT, 98, 2000, ME, XP\r
  24                                                                                         //      BA - OS/2 Bitmap Array\r
  25                                                                                         //      CI - OS/2 Color Icon\r
  26                                                                                         //      CP - OS/2 Color Pointer\r
  27                                                                                         //      IC - OS/2 Icon\r
  28                                                                                         //      PT - OS/2 Pointer\r
  29                 u32     FileSize;\r
  30                 u32     Reserved;\r
  31                 u32     BitmapDataOffset;\r
  32                 u32     BitmapHeaderSize;       // should be 28h for windows bitmaps or\r
  33                                                                                         // 0Ch for OS/2 1.x or F0h for OS/2 2.x\r
  34                 u32 Width;\r
  35                 u32 Height;\r
  36                 u16 Planes;\r
  37                 u16 BPP;                                        // 1: Monochrome bitmap\r
  38                                                                                         // 4: 16 color bitmap\r
  39                                                                                         // 8: 256 color bitmap\r
  40                                                                                         // 16: 16bit (high color) bitmap\r
  41                                                                                         // 24: 24bit (true color) bitmap\r
  42                                                                                         // 32: 32bit (true color) bitmap\r
  43 \r
  44                 u32  Compression;                       // 0: none (Also identified by BI_RGB)\r
  45                                                                                         // 1: RLE 8-bit / pixel (Also identified by BI_RLE4)\r
  46                                                                                         // 2: RLE 4-bit / pixel (Also identified by BI_RLE8)\r
  47                                                                                         // 3: Bitfields  (Also identified by BI_BITFIELDS)\r
  48 \r
  49                 u32  BitmapDataSize;            // Size of the bitmap data in bytes. This number must be rounded to the next 4 byte boundary.\r
  50                 u32  PixelPerMeterX;\r
  51                 u32  PixelPerMeterY;\r
  52                 u32  Colors;\r
  53                 u32  ImportantColors;\r
  54         } PACK_STRUCT;\r
  55 \r
  56 // Default alignment\r
  57 #include "irrunpack.h"\r
  58 \r
  59 /*!\r
  60         Surface Loader for Windows bitmaps\r
  61 */\r
  62 class CImageLoaderBMP : public IImageLoader\r
  63 {\r
  64 public:\r
  65 \r
  66         //! constructor\r
  67         CImageLoaderBMP();\r
  68 \r
  69         //! returns true if the file maybe is able to be loaded by this class\r
  70         //! based on the file extension (e.g. ".tga")\r
  71         bool isALoadableFileExtension(const io::path& filename) const override;\r
  72 \r
  73         //! returns true if the file maybe is able to be loaded by this class\r
  74         bool isALoadableFileFormat(io::IReadFile* file) const override;\r
  75 \r
  76         //! creates a surface from the file\r
  77         IImage* loadImage(io::IReadFile* file) const override;\r
  78 \r
  79 private:\r
  80 \r
  81         void decompress8BitRLE(u8*& BmpData, s32 size, s32 width, s32 height, s32 pitch) const;\r
  82 \r
  83         void decompress4BitRLE(u8*& BmpData, s32 size, s32 width, s32 height, s32 pitch) const;\r
  84 };\r
  85 \r
  86 \r
  87 } // end namespace video\r
  88 } // end namespace irr\r
  89 \r
  90 #endif\r