C语言读取BMP图像，并进行反色操作

#include <iostream> using namespace std; #include "bmph.h" void showBmpFILEHead(tagBITMAPFILEHEADER *pBmpHead) { printf("File Head\n"); printf("File Type: %c%c\n", (pBmpHead->bfType) % 256, (pBmpHead->bfType) / 256); printf("File Size: %d\n", pBmpHead->bfSize); printf("Reserved1: %d\n", pBmpHead->bfReserved1); printf("Reserved2: %d\n", pBmpHead->bfReserved2); printf("Offset Bits: %d\n", pBmpHead->bfOffBits); } void showBmpInfoHead(tagBITMAPINFOHEADER *pBmpInfoHead) { printf("Info Head:\n"); printf("Struct Size: %d\n", pBmpInfoHead->biSize); printf("Width: %d\n", pBmpInfoHead->biWidth); printf("Height: %d\n", pBmpInfoHead->biHeight); printf("Planes: %d\n", pBmpInfoHead->biPlanes); printf("BitCout: %d\n", pBmpInfoHead->biBitCount); printf("Compression: %d\n", pBmpInfoHead->biCompression); printf("Image Size: %d\n", pBmpInfoHead->biSizeImage); printf("X Resolution: %d\n", pBmpInfoHead->biXPelsPerMeter); printf("Y Resolution: %d\n", pBmpInfoHead->biYPelsPerMeter); printf("Color Used: %d\n", pBmpInfoHead->biClrUsed); printf("Color Important: %d\n", pBmpInfoHead->biClrImportant); } void showRgbQuad(tagRGBQUAD *pRGB) { printf("(%-3d, %-3d, %-3d) ", pRGB->rgbRed, pRGB->rgbGreen, pRGB->rgbBlue); } void readBmp(string f, FILE *ifp, FILE *ofp) { tagBITMAPFILEHEADER bitHead; tagBITMAPINFOHEADER bitInfoHead; if (!ifp) { cerr << "error: unable to open file: "<< f << endl; return ; } cout << "file " << "\"" << f + ".bmp" << "\""<< " open success." << endl << endl; int c; while ((c = fgetc(ifp)) != EOF) { fputc(c, ofp); } fclose(ifp); fseek(ofp, 0, SEEK_SET); fread(&bitHead.bfType, 1, 2, ofp); if (bitHead.bfType != 0x4d42) { printf("file is not .bmp file!\n"); return ; } fseek(ofp, -2, SEEK_CUR); fread(&bitHead, 1, sizeof(tagBITMAPFILEHEADER), ofp); showBmpFILEHead(&bitHead); cout << "\n\n"; fread(&bitInfoHead, 1, sizeof(BITMAPINFOHEADER), ofp); showBmpInfoHead(&bitInfoHead); cout << "\n\n"; RGBQUAD *pRgb; if (bitInfoHead.biBitCount < 24) { long nPlantNum = long(pow(2, double(bitInfoHead.biBitCount))); pRgb = new RGBQUAD[nPlantNum * sizeof(RGBQUAD)]; memset(pRgb, 0, nPlantNum * sizeof(RGBQUAD)); int num = fread(pRgb, 4, nPlantNum, ofp); printf("Color Plant Number: %d\n", num); printf("RGBQUAD Info: \n"); for (int i = 0; i < nPlantNum; i++) { if (i && (i % 5 == 0)) { printf("\n"); } showRgbQuad(&pRgb[i]); } cout << endl; } int width = bitInfoHead.biWidth; int height = bitInfoHead.biHeight; int l_width = WIDTHBYTES(width* bitInfoHead.biBitCount); BYTE *pColorData = new BYTE[height * l_width]; memset(pColorData, 0, height * l_width); long nData = height * l_width; long curp = ftell(ofp); fread(pColorData, 1, nData, ofp); printf("%x\n", pColorData[0]); fseek(ofp, curp - ftell(ofp), SEEK_CUR); tagRGBQUAD *dataOfBmp; dataOfBmp = new tagRGBQUAD[width * height * sizeof(tagRGBQUAD)]; memset(dataOfBmp, 0, width * height * sizeof(tagRGBQUAD)); if (bitInfoHead.biBitCount < 24) { int k, index = 0; if (bitInfoHead.biBitCount == 1) { for (int i = 0; i < height; i++) { for (int j = 0; j < width; j++) { BYTE mixIndex = 0; k = i * l_width + j / 8; mixIndex = pColorData[k]; switch (j % 8) { case 0: mixIndex = mixIndex << 7; mixIndex = mixIndex >> 7; break; case 1: mixIndex = mixIndex << 6; mixIndex = mixIndex >> 7; break; case 2: mixIndex = mixIndex << 5; mixIndex = mixIndex >> 7; break; case 3: mixIndex = mixIndex << 4; mixIndex = mixIndex >> 7; break; case 4: mixIndex = mixIndex << 3; mixIndex = mixIndex >> 7; break; case 5: mixIndex = mixIndex << 2; mixIndex = mixIndex >> 7; break; case 6: mixIndex = mixIndex << 1; mixIndex = mixIndex >> 7; break; case 7: mixIndex = mixIndex >> 7; break; default: break; } dataOfBmp[index].rgbRed = pRgb[mixIndex].rgbRed; dataOfBmp[index].rgbGreen = pRgb[mixIndex].rgbGreen; dataOfBmp[index].rgbBlue = pRgb[mixIndex].rgbBlue; dataOfBmp[index].rgbReserved = pRgb[mixIndex].rgbReserved; index++; } } } if (bitInfoHead.biBitCount == 2) { for (int i = 0; i < height; i++) { for (int j = 0; j < width; j++) { BYTE mixIndex = 0; k = i * l_width + j / 4; mixIndex = pColorData[k]; switch(j % 4) { case 0: mixIndex = mixIndex << 6; mixIndex = mixIndex >> 6; case 1: mixIndex = mixIndex << 4; mixIndex = mixIndex >> 6; case 2: mixIndex = mixIndex << 2; mixIndex = mixIndex >> 6; case 3: mixIndex = mixIndex >> 6; default: break; } dataOfBmp[index].rgbRed = pRgb[mixIndex].rgbRed; dataOfBmp[index].rgbGreen = pRgb[mixIndex].rgbGreen; dataOfBmp[index].rgbBlue = pRgb[mixIndex].rgbBlue; dataOfBmp[index].rgbReserved = pRgb[mixIndex].rgbReserved; index++; } } } if (bitInfoHead.biBitCount == 4) { for (int i = 0; i < height; i++) { for (int j = 0; j < width; j++) { BYTE mixIndex = 0; k = i * l_width + j / 2; mixIndex = pColorData[k]; if (j % 2) { mixIndex = mixIndex << 4; mixIndex = mixIndex >> 4; } else { mixIndex = mixIndex >> 4; } dataOfBmp[index].rgbRed = pRgb[mixIndex].rgbRed; dataOfBmp[index].rgbGreen = pRgb[mixIndex].rgbGreen; dataOfBmp[index].rgbBlue = pRgb[mixIndex].rgbBlue; dataOfBmp[index].rgbReserved = pRgb[mixIndex].rgbReserved; index++; } } } if (bitInfoHead.biBitCount == 8) { for (int i = 0; i < height; i++) { for (int j = 0; j < width; j++) { BYTE mixIndex = 0; k = i * l_width + j; mixIndex = pColorData[k]; dataOfBmp[index].rgbRed = pRgb[mixIndex].rgbRed; dataOfBmp[index].rgbGreen = pRgb[mixIndex].rgbGreen; dataOfBmp[index].rgbBlue = pRgb[mixIndex].rgbBlue; dataOfBmp[index].rgbReserved = pRgb[mixIndex].rgbReserved; index++; } } } if (bitInfoHead.biBitCount == 16) { for (int i = 0; i < height; i++) { for (int j = 0; j < width; j++) { WORD mixIndex = 0; k = i * l_width + j * 2; WORD shortTemp; shortTemp = pColorData[k+1]; shortTemp = shortTemp << 8; mixIndex = pColorData[k] + shortTemp; dataOfBmp[index].rgbRed = pRgb[mixIndex].rgbRed; dataOfBmp[index].rgbGreen = pRgb[mixIndex].rgbGreen; dataOfBmp[index].rgbBlue = pRgb[mixIndex].rgbBlue; dataOfBmp[index].rgbReserved = pRgb[mixIndex].rgbReserved; index++; } } } } else // 24x { int k, index = 0; for (int i = 0; i < height; i++) { for (int j = 0; j < width; j++) { k = i * l_width + j * 3; dataOfBmp[index].rgbRed = pColorData[k+2]; dataOfBmp[index].rgbGreen = pColorData[k+1]; dataOfBmp[index].rgbBlue = pColorData[k]; pColorData[k] = 255 - pColorData[k]; pColorData[k+1] = 255 - pColorData[k+1]; pColorData[k+2] = 255 - pColorData[k+2]; index++; } } fwrite(pColorData, 1, nData, ofp); } /*printf("\n\nPixel Data Info:\n"); for (int i = 0; i < width * height; i++) { if (i && (i % 5 == 0)) { cout << endl; } showRgbQuad(&dataOfBmp[i]); }*/ fclose(ofp); if (bitInfoHead.biBitCount < 24) { free(pRgb); } free(dataOfBmp); free(pColorData); cout << endl; }