Implemented case when the size of the masked image doesn't match to the size of the mask.

PdfReader/Src/RendererOutputDev.cpp

@@ -3309,9 +3309,7 @@ namespace PdfReader
 		if (m_bDrawOnlyText)
 			return;
 
-		// Вообще, размеры маски и самой картинки могут не совпадать (в этом случае мы должны срезайзить до размеров картинки)
-		// TO DO: Сделать, когда появится файл
-		if (nWidth != nMaskWidth || nHeight != nMaskHeight)
+		if (nMaskWidth <= 0 || nMaskHeight <= 0)
 			DrawImage(pGState, pRef, pStream, nWidth, nHeight, pColorMap, NULL, false);
 
 		double dPageHeight = pGState->GetPageHeight();
@@ -3334,6 +3332,59 @@ namespace PdfReader
 		pMask->Reset();
 		pImageStream->Reset();
 
+		if (nWidth != nMaskWidth || nHeight != nMaskHeight)
+		{
+			unsigned char *pMaskBuffer = new unsigned char[nMaskWidth * nMaskHeight];
+			if (!pMaskBuffer)
+			{
+				delete pMask;
+				delete pImageStream;
+				return;
+			}
+
+			unsigned char unMask = 0;
+			for (int nY = nMaskHeight - 1; nY >= 0; nY--)
+			{
+				for (int nX = 0; nX < nMaskWidth; nX++)
+				{
+					int nIndex = nX + nY * nMaskWidth;
+					pMask->GetPixel(&unMask);
+					pMaskBuffer[nIndex] = unMask;
+				}
+			}
+
+			double dScaleWidth  = (double)nWidth / (double)nMaskWidth;
+			double dScaleHeight = (double)nHeight / (double)nMaskHeight;
+
+			unsigned char unPixel[4] ={ 0, 0, 0, 0 };
+			for (int nY = nHeight - 1; nY >= 0; nY--)
+			{
+				for (int nX = 0; nX < nWidth; nX++)
+				{
+					int nIndex = 4 * (nX + nY * nWidth);
+					pImageStream->GetPixel(unPixel);
+
+					int nNearestY = std::min((int)(nY / dScaleHeight), nMaskHeight - 1);
+					int nNearestX = std::min((int)(nX / dScaleWidth), nMaskWidth - 1);
+					unMask = pMaskBuffer[nNearestY * nMaskWidth + nNearestX];
+
+					GrRGB oRGB;
+					pColorMap->GetRGB(unPixel, &oRGB);
+					pBufferPtr[nIndex + 0] = ColorToByte(oRGB.b);
+					pBufferPtr[nIndex + 1] = ColorToByte(oRGB.g);
+					pBufferPtr[nIndex + 2] = ColorToByte(oRGB.r);
+
+					if (unMask && !bMaskInvert)
+						pBufferPtr[nIndex + 3] = 0;
+					else
+						pBufferPtr[nIndex + 3] = 255;
+				}
+			}
+
+			delete[] pMaskBuffer;
+		}
+		else
+		{
 			unsigned char unPixel[4] ={ 0, 0, 0, 0 };
 			unsigned char unMask = 0;
 			for (int nY = nHeight - 1; nY >= 0; nY--)
@@ -3355,6 +3406,7 @@ namespace PdfReader
 						pBufferPtr[nIndex + 3] = 255;
 				}
 			}
+		}
 
 		delete pMask;
 		delete pImageStream;