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windowscodecs: Make JPEG decoder fallback to 96 dpi resolution for density_unit == 0 case.
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1 changed files with 12 additions and 5 deletions
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@ -548,16 +548,23 @@ static HRESULT WINAPI JpegDecoder_Frame_GetResolution(IWICBitmapFrameDecode *ifa
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EnterCriticalSection(&This->lock);
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EnterCriticalSection(&This->lock);
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if (This->cinfo.density_unit == 2) /* pixels per centimeter */
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switch (This->cinfo.density_unit)
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{
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{
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case 2: /* pixels per centimeter */
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*pDpiX = This->cinfo.X_density * 2.54;
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*pDpiX = This->cinfo.X_density * 2.54;
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*pDpiY = This->cinfo.Y_density * 2.54;
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*pDpiY = This->cinfo.Y_density * 2.54;
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}
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break;
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else
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{
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case 1: /* pixels per inch */
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/* 1 = pixels per inch, 0 = unknown */
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*pDpiX = This->cinfo.X_density;
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*pDpiX = This->cinfo.X_density;
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*pDpiY = This->cinfo.Y_density;
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*pDpiY = This->cinfo.Y_density;
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break;
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case 0: /* unknown */
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default:
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*pDpiX = 96.0;
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*pDpiY = 96.0;
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break;
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}
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}
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LeaveCriticalSection(&This->lock);
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LeaveCriticalSection(&This->lock);
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