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Была надобность написать такой класс, для того, что бы можно было сразу все файлы в директории конвертировать в ICO, BMP.
Структуры спизжены с Polychaos если что
пример использования
C++:
#pragma pack(push, 2)
struct BitmapFileHeader {
uint16_t type;
uint32_t size;
uint16_t reserved1;
uint16_t reserved2;
uint32_t offset;
};
struct BitmapInfoHeader {
uint32_t size;
int32_t width;
int32_t height;
uint16_t planes;
uint16_t bitCount;
uint32_t compression;
uint32_t sizeImage;
int32_t xPelsPerMeter;
int32_t yPelsPerMeter;
uint32_t clrUsed;
uint32_t clrImportant;
};
struct IconHeader {
uint16_t reserved;
uint16_t type;
uint16_t count;
};
struct IconDirectoryEntry {
uint8_t width;
uint8_t height;
uint8_t colorCount;
uint8_t reserved;
uint16_t planes;
uint16_t bitCount;
uint32_t sizeInBytes;
uint32_t offset;
};
static const char ppm_header[] = "P6\n32 32\n255\n"; // P6 - формаит PPM, 32 32 - размер, 255 цветовой компонент от 0 до 255
#pragma pack(pop)
class ImageConverter {
public:
void ConvertPNGtoBMP(const std::string& inputFileName, const std::string& outputFileName) {
std::ifstream inputFile(inputFileName, std::ios::binary);
if (!inputFile) {
std::cerr << "Error reading input file." << std::endl;
return;
}
std::ofstream outputFile(outputFileName, std::ios::binary);
if (!outputFile) {
std::cerr << "Error writing to output file." << std::endl;
return;
}
BitmapFileHeader fileHeader;
fileHeader.type = 0x4D42;
fileHeader.reserved1 = 0;
fileHeader.reserved2 = 0;
BitmapInfoHeader infoHeader;
infoHeader.size = sizeof(BitmapInfoHeader);
infoHeader.width = 32;
infoHeader.height = 32;
infoHeader.planes = 1;
infoHeader.bitCount = 24;
infoHeader.compression = 0;
infoHeader.sizeImage = 0;
infoHeader.xPelsPerMeter = 0;
infoHeader.yPelsPerMeter = 0;
infoHeader.clrUsed = 0;
infoHeader.clrImportant = 0;
outputFile.write(reinterpret_cast<const char*>(&fileHeader), sizeof(fileHeader));
outputFile.write(reinterpret_cast<const char*>(&infoHeader), sizeof(infoHeader));
std::vector<uint8_t> imageData(32 * 32 * 3, 0);
outputFile.write(reinterpret_cast<const char*>(imageData.data()), imageData.size());
}
void ConvertPNGtoPPM(const std::string& inputFileName, const std::string& outputFileName) {
std::ifstream inputFile(inputFileName, std::ios::binary);
if (!inputFile) {
std::cerr << "Error reading input file." << std::endl;
return;
}
std::vector<uint8_t> imageData((std::istreambuf_iterator<char>(inputFile)), std::istreambuf_iterator<char>());
std::ofstream outputFile(outputFileName, std::ios::binary);
if (!outputFile) {
std::cerr << "Error writing to output file." << std::endl;
return;
}
outputFile.write(ppm_header, sizeof(ppm_header) - 1);
outputFile.write(reinterpret_cast<const char*>(imageData.data()), imageData.size());
if (!outputFile) {
std::cerr << "Error writing to output file." << std::endl;
return;
}
}
void ConvertPNGtoICO(const std::string& inputFileName, const std::string& outputFileName) {
std::ifstream inputFile(inputFileName, std::ios::binary);
if (!inputFile) {
std::cerr << "Error reading input file." << std::endl;
return;
}
std::vector<uint8_t> imageData((std::istreambuf_iterator<char>(inputFile)), std::istreambuf_iterator<char>());
IconHeader iconHeader = { 0, 1, 1 };
IconDirectoryEntry directoryEntry = { 32, 32, 0, 0, 1, 32, static_cast<uint32_t>(imageData.size()), 22 };
std::ofstream outputFile(outputFileName, std::ios::binary);
if (!outputFile) {
std::cerr << "Error writing to output file." << std::endl;
return;
}
outputFile.write(reinterpret_cast<const char*>(&iconHeader), sizeof(iconHeader));
outputFile.write(reinterpret_cast<const char*>(&directoryEntry), sizeof(directoryEntry));
outputFile.write(reinterpret_cast<const char*>(imageData.data()), imageData.size());
if (!outputFile) {
std::cerr << "Error writing to output file." << std::endl;
return;
}
}
};
пример использования
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