drivers/lcd/tft/bmp.h

   1 /**************************************************************************/
   2 /*!
   3     @file     bmp.h
   4     @author   K. Townsend (microBuilder.eu)
   5
   6     @section LICENSE
   7
   8     Software License Agreement (BSD License)
   9
  10     Copyright (c) 2010, microBuilder SARL
  11     All rights reserved.
  12
  13     Redistribution and use in source and binary forms, with or without
  14     modification, are permitted provided that the following conditions are met:
  15     1. Redistributions of source code must retain the above copyright
  16     notice, this list of conditions and the following disclaimer.
  17     2. Redistributions in binary form must reproduce the above copyright
  18     notice, this list of conditions and the following disclaimer in the
  19     documentation and/or other materials provided with the distribution.
  20     3. Neither the name of the copyright holders nor the
  21     names of its contributors may be used to endorse or promote products
  22     derived from this software without specific prior written permission.
  23
  24     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
  25     EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  26     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  27     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
  28     DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  29     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  30     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  31     ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  32     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34 */
  35 /**************************************************************************/
  36 #ifndef __BMP_H__
  37 #define __BMP_H__
  38
  39 #include "projectconfig.h"
  40
  41 /**************************************************************************
  42     Windows Bitmap File Format
  43     -----------------------------------------------------------------------
  44     Windows bitmap images are relatively easy to work with because the
  45     format is basic and requires limited overhead to work with (in
  46     practice, image data is very rarely compressed).  Bitmap files have
  47     the following structure:
  48
  49     --------------------------
  50     |          Header        |        14 bytes
  51     |-------------------------
  52     |        Info Header     |        40 bytes
  53     -----------------------
  54     |    Palette (optional)  |
  55     |-------------------------
  56     |       Image Data       |
  57     --------------------------
  58
  59     For more information on the bitmap file format, see:
  60     http://local.wasp.uwa.edu.au/~pbourke/dataformats/bmp/
  61
  62  **************************************************************************/
  63
  64
  65 /**************************************************************************/
  66 /*!
  67     @brief  14-byte Windows bitmap header
  68 */
  69 /**************************************************************************/
  70 typedef struct
  71 {
  72   uint16_t type;                      /* Magic identifier            */
  73   uint32_t size;                      /* File size in bytes          */
  74   uint16_t reserved1;
  75   uint16_t reserved2;
  76   uint32_t offset;                    /* Offset to image data, bytes */
  77 } bmp_header_t;
  78
  79 /**************************************************************************/
  80 /*!
  81     @brief  40-byte Windows bitmap info header
  82 */
  83 /**************************************************************************/
  84 typedef struct
  85 {
  86   uint32_t size;                      /* Header size in bytes      */
  87   int32_t  width;                     /* Width of the image        */
  88   int32_t  height;                    /* Height of image           */
  89   uint16_t planes;                    /* Number of colour planes   */
  90   uint16_t bits;                      /* Bits per pixel            */
  91   uint32_t compression;               /* Compression type          */
  92   uint32_t imagesize;                 /* Image size in bytes       */
  93   int32_t  xresolution;               /* Pixels per meter          */
  94   int32_t  yresolution;               /* Pixels per meter          */
  95   uint32_t ncolours;                  /* Number of colours         */
  96   uint32_t importantcolours;          /* Important colours         */
  97 } bmp_infoheader_t;
  98
  99 /**************************************************************************/
 100 /*!
 101     @brief  Describes the different compression methods available in
 102             Windows bitmap images, though compression is not currently
 103             supported by this code.
 104 */
 105 /**************************************************************************/
 106 typedef enum
 107 {
 108   BMP_COMPRESSION_NONE = 0,
 109   BMP_COMPRESSION_RLE8 = 1,
 110   BMP_COMPRESSION_RLE4 = 2,
 111   BMP_COMPRESSION_RGBMASK = 3
 112 } bmp_compression_t;
 113
 114 /**************************************************************************/
 115 /*!
 116     @brief  24-bit pixel data
 117 */
 118 /**************************************************************************/
 119 typedef struct
 120 {
 121   uint8_t rgbBlue;                    /* Blue value */
 122   uint8_t rgbGreen;                   /* Green value */
 123   uint8_t rgbRed;                     /* Red value */
 124 } bmp_rgbdata_t;
 125
 126 /**************************************************************************/
 127 /*!
 128     @brief  Error return codes when processing bitmap images
 129 */
 130 /**************************************************************************/
 131 typedef enum
 132 {
 133   BMP_ERROR_NONE = 0,
 134   BMP_ERROR_SDINITFAIL = 1,
 135   BMP_ERROR_FILENOTFOUND = 2,
 136   BMP_ERROR_UNABLETOCREATEFILE = 3,
 137   BMP_ERROR_NOTABITMAP = 10,          /* First two bytes of the image not 'BM' */
 138   BMP_ERROR_INVALIDBITDEPTH = 11,     /* Image is not 24-bits */
 139   BMP_ERROR_COMPRESSEDDATA = 12,      /* Image contains compressed data (not supported) */
 140   BMP_ERROR_INVALIDDIMENSIONS = 13,   /* Image is > CFG_TFTLCD_WIDTH pixels wide or > CFG_TFTLCD_HEIGHT pixels high */
 141   BMP_ERROR_PREMATUREEOF = 14         /* EOF reached unexpectedly in pixel data */
 142 } bmp_error_t;
 143
 144 bmp_error_t bmpDrawBitmap(uint16_t x, uint16_t y, const char* filename);
 145
 146 #if defined CFG_SDCARD_READONLY && CFG_SDCARD_READONLY == 0
 147 bmp_error_t bmpSaveScreenshot(const char* filename);
 148 #endif
 149
 150 #endif