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5
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1 #include "ostc45_icon.h"
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2
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3
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4 //OSTC45_Icon::OSTC45_Icon() {}
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5
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6
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7 #pragma pack(push, 1)
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8 struct BMPFileHeader
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9 {
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10 uint16_t bfType;
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11 uint32_t bfSize;
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12 uint16_t bfReserved1;
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13 uint16_t bfReserved2;
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14 uint32_t bfOffBits;
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15 };
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16
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17 struct BMPInfoHeader
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18 {
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19 uint32_t biSize;
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20 int32_t biWidth;
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21 int32_t biHeight;
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22 uint16_t biPlanes;
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23 uint16_t biBitCount;
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24 uint32_t biCompression;
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25 uint32_t biSizeImage;
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26 int32_t biXPelsPerMeter;
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27 int32_t biYPelsPerMeter;
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28 uint32_t biClrUsed;
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29 uint32_t biClrImportant;
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30 };
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31 #pragma pack(pop)
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32
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33 BmpToArray::BmpToArray(const QString& filename)
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34 {
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35 loadBMP(filename);
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36 }
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37
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38 void BmpToArray::loadBMP(const QString& filename)
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39 {
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40 QFile file(filename);
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41 int dstY;
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42 QByteArray rowBuffer;
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43 bool topDown = false;
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44 BMPFileHeader fileHeader;
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45 BMPInfoHeader infoHeader;
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46
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47 if (!file.open(QIODevice::ReadOnly))
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48 throw std::runtime_error("Cannot open BMP file");
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49
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50 if (file.read(reinterpret_cast<char*>(&fileHeader),
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51 sizeof(BMPFileHeader)) != sizeof(BMPFileHeader))
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52 throw std::runtime_error("Failed to read BMP file header");
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53
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54 if (file.read(reinterpret_cast<char*>(&infoHeader),
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55 sizeof(BMPInfoHeader)) != sizeof(BMPInfoHeader))
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56 throw std::runtime_error("Failed to read BMP info header");
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57
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58 if (fileHeader.bfType != 0x4D42)
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59 throw std::runtime_error("Not a valid BMP file");
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60
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61 if (infoHeader.biBitCount != 8)
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62 throw std::runtime_error("Only 8-bit BMP supported");
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63 if (infoHeader.biCompression != 0)
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64 throw std::runtime_error("Compressed BMP not supported");
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65
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66 if(infoHeader.biWidth > 800)
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67 throw std::runtime_error("Only BMP with 800 or less horizontal pixels supported");
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68
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69 if(infoHeader.biHeight > 480)
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70 throw std::runtime_error("Only BMP with 480 or less vertical pixels supported");
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71
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72 // Width / Height
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73 width = infoHeader.biWidth;
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74 height = infoHeader.biHeight;
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75
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76 if ((int32_t)height < 0) {
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77 height = -((int32_t)height);
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78 topDown = true;
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79 }
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80
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81 // Palette
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82 uint32_t colorCount = infoHeader.biClrUsed;
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83 if (colorCount == 0) colorCount = 256;
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84 if (colorCount > 256) colorCount = 256;
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85
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86 clut.resize(colorCount);
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87
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88 for (uint32_t i = 0; i < colorCount; ++i)
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89 file.read(reinterpret_cast<char*>(&clut[i]), 4);
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90
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91 // CLUT in 32-Bit transform 0x00RRGGBB
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92 clut32.resize(255, 0);
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93
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94 for (uint32_t i = 0; i < colorCount && i < 255; ++i)
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95 {
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96 clut32[i] =
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97 (clut[i].r << 16) |
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98 (clut[i].g << 8) |
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99 (clut[i].b);
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100 }
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101
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102 // Pixel-Data
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103 if (!file.seek(fileHeader.bfOffBits))
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104 throw std::runtime_error("Failed to seek to pixel data");
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105
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106 pixelData.resize(width * height);
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107
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108 size_t rowSize = (width + 3) & ~3; // 4-Byte alignment
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109
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110 rowBuffer.resize(rowSize);
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111
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112 for (int y = 0; y < height; ++y)
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113 {
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114 if (file.read(rowBuffer.data(), rowSize) != rowSize)
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115 throw std::runtime_error("Failed to read BMP pixel row");
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116
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117 if (topDown)
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118 {
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119 dstY = height - 1 - y;
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120 }
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121 else
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122 {
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123 dstY = y;
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124 }
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125
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126 for (int x = 0; x < width; ++x)
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127 {
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128 pixelData[x * height + dstY] =
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129 static_cast<uint8_t>(rowBuffer[x]);
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130 }
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131 }
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132
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133
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134 }
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135 QByteArray BmpToArray::getTransferBytes() const
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136 {
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137 QByteArray out;
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138
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139 out.reserve(clut32.size() * 4 + pixelData.size());
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140
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141 // CLUT (32 Bit, Little Endian)
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142 for (uint32_t color : clut32)
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143 {
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144 out.append(static_cast<char>( color & 0xFF));
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145 out.append(static_cast<char>((color >> 8) & 0xFF));
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146 out.append(static_cast<char>((color >> 16) & 0xFF));
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147 out.append(static_cast<char>((color >> 24) & 0xFF));
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148 }
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149
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150 // Pixel (8 Bit)
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151 out.append(reinterpret_cast<const char*>(pixelData.data()),
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152 pixelData.size());
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153
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154 return out;
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155 }
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156
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157 void BmpToArray::getImageXY(uint32_t* x, uint32_t* y)
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158 {
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159 *x = width;
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160 *y = height;
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161 }
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162
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163
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