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https://github.com/RetroDECK/ES-DE.git
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64 lines
2 KiB
C++
64 lines
2 KiB
C++
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#include "ImageIO.h"
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#include "Log.h"
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std::vector<unsigned char> ImageIO::loadFromMemoryRGBA32(const unsigned char * data, const size_t size, size_t & width, size_t & height)
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{
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std::vector<unsigned char> rawData;
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width = 0;
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height = 0;
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FIMEMORY * fiMemory = FreeImage_OpenMemory((BYTE *)data, size);
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if (fiMemory != nullptr) {
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//detect the filetype from data
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FREE_IMAGE_FORMAT format = FreeImage_GetFileTypeFromMemory(fiMemory);
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if (format != FIF_UNKNOWN && FreeImage_FIFSupportsReading(format))
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{
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//file type is supported. load image
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FIBITMAP * fiBitmap = FreeImage_LoadFromMemory(format, fiMemory);
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if (fiBitmap != nullptr)
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{
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//loaded. convert to 32bit
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FIBITMAP * fiConverted = FreeImage_ConvertTo32Bits(fiBitmap);
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if (fiConverted != nullptr)
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{
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width = FreeImage_GetWidth(fiConverted);
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height = FreeImage_GetHeight(fiConverted);
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unsigned int pitch = FreeImage_GetPitch(fiConverted);
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//loop through scanlines and add all pixel data to the return vector
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//this is necessary, because width*height*bpp might not be == pitch
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unsigned char * tempData = new unsigned char[width * height * 4];
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for (size_t i = 0; i < height; i++)
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{
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const BYTE * scanLine = FreeImage_GetScanLine(fiConverted, i);
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memcpy(tempData + (i * width * 4), scanLine, width * 4);
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}
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//convert from BGRA to RGBA
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for(size_t i = 0; i < width*height; i++)
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{
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RGBQUAD bgra = ((RGBQUAD *)tempData)[i];
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RGBQUAD rgba;
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rgba.rgbBlue = bgra.rgbRed;
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rgba.rgbGreen = bgra.rgbGreen;
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rgba.rgbRed = bgra.rgbBlue;
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rgba.rgbReserved = bgra.rgbReserved;
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((RGBQUAD *)tempData)[i] = rgba;
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}
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rawData = std::vector<unsigned char>(tempData, tempData + width * height * 4);
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//free converted data
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FreeImage_Unload(fiConverted);
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}
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//free bitmap data
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FreeImage_Unload(fiBitmap);
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}
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}
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else
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{
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LOG(LogError) << "Error - File type unknown/unsupported!";
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}
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//free FIMEMORY again
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FreeImage_CloseMemory(fiMemory);
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}
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return rawData;
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}
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