xbmc/guilib/DDSImage.cpp

   1 /*
   2  *  Copyright (C) 2005-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #include "DDSImage.h"
  10
  11 #include "XBTF.h"
  12 #include "filesystem/File.h"
  13 #include "utils/log.h"
  14
  15 #include <algorithm>
  16 #include <string.h>
  17 using namespace XFILE;
  18
  19 CDDSImage::CDDSImage()
  20 {
  21   m_data = NULL;
  22   memset(&m_desc, 0, sizeof(m_desc));
  23 }
  24
  25 CDDSImage::CDDSImage(unsigned int width, unsigned int height, unsigned int format)
  26 {
  27   m_data = NULL;
  28   Allocate(width, height, format);
  29 }
  30
  31 CDDSImage::~CDDSImage()
  32 {
  33   delete[] m_data;
  34 }
  35
  36 unsigned int CDDSImage::GetWidth() const
  37 {
  38   return m_desc.width;
  39 }
  40
  41 unsigned int CDDSImage::GetHeight() const
  42 {
  43   return m_desc.height;
  44 }
  45
  46 unsigned int CDDSImage::GetFormat() const
  47 {
  48   if (m_desc.pixelFormat.flags & DDPF_RGB)
  49     return 0; // Not supported
  50   if (m_desc.pixelFormat.flags & DDPF_FOURCC)
  51   {
  52     if (strncmp((const char *)&m_desc.pixelFormat.fourcc, "DXT1", 4) == 0)
  53       return XB_FMT_DXT1;
  54     if (strncmp((const char *)&m_desc.pixelFormat.fourcc, "DXT3", 4) == 0)
  55       return XB_FMT_DXT3;
  56     if (strncmp((const char *)&m_desc.pixelFormat.fourcc, "DXT5", 4) == 0)
  57       return XB_FMT_DXT5;
  58     if (strncmp((const char *)&m_desc.pixelFormat.fourcc, "ARGB", 4) == 0)
  59       return XB_FMT_A8R8G8B8;
  60   }
  61   return 0;
  62 }
  63
  64 unsigned int CDDSImage::GetSize() const
  65 {
  66   return m_desc.linearSize;
  67 }
  68
  69 unsigned char *CDDSImage::GetData() const
  70 {
  71   return m_data;
  72 }
  73
  74 bool CDDSImage::ReadFile(const std::string &inputFile)
  75 {
  76   // open the file
  77   CFile file;
  78   if (!file.Open(inputFile))
  79     return false;
  80
  81   // read the header
  82   uint32_t magic;
  83   if (file.Read(&magic, 4) != 4)
  84     return false;
  85   if (file.Read(&m_desc, sizeof(m_desc)) != sizeof(m_desc))
  86     return false;
  87   if (!GetFormat())
  88     return false;  // not supported
  89
  90   // allocate our data
  91   m_data = new unsigned char[m_desc.linearSize];
  92   if (!m_data)
  93     return false;
  94
  95   // and read it in
  96   if (file.Read(m_data, m_desc.linearSize) != static_cast<ssize_t>(m_desc.linearSize))
  97     return false;
  98
  99   file.Close();
 100   return true;
 101 }
 102
 103 unsigned int CDDSImage::GetStorageRequirements(unsigned int width, unsigned int height, unsigned int format)
 104 {
 105   switch (format)
 106   {
 107   case XB_FMT_DXT1:
 108     return ((width + 3) / 4) * ((height + 3) / 4) * 8;
 109   case XB_FMT_DXT3:
 110   case XB_FMT_DXT5:
 111     return ((width + 3) / 4) * ((height + 3) / 4) * 16;
 112   case XB_FMT_A8R8G8B8:
 113   default:
 114     return width * height * 4;
 115   }
 116 }
 117
 118 void CDDSImage::Allocate(unsigned int width, unsigned int height, unsigned int format)
 119 {
 120   memset(&m_desc, 0, sizeof(m_desc));
 121   m_desc.size = sizeof(m_desc);
 122   m_desc.flags = ddsd_caps | ddsd_pixelformat | ddsd_width | ddsd_height | ddsd_linearsize;
 123   m_desc.height = height;
 124   m_desc.width = width;
 125   m_desc.linearSize = GetStorageRequirements(width, height, format);
 126   m_desc.pixelFormat.size = sizeof(m_desc.pixelFormat);
 127   m_desc.pixelFormat.flags = ddpf_fourcc;
 128   memcpy(&m_desc.pixelFormat.fourcc, GetFourCC(format), 4);
 129   m_desc.caps.flags1 = ddscaps_texture;
 130   delete[] m_data;
 131   m_data = new unsigned char[m_desc.linearSize];
 132 }
 133
 134 const char *CDDSImage::GetFourCC(unsigned int format)
 135 {
 136   switch (format)
 137   {
 138   case XB_FMT_DXT1:
 139     return "DXT1";
 140   case XB_FMT_DXT3:
 141     return "DXT3";
 142   case XB_FMT_DXT5:
 143     return "DXT5";
 144   case XB_FMT_A8R8G8B8:
 145   default:
 146     return "ARGB";
 147   }
 148 }