[問題] 讀取bmp影像檔

看板MacDev作者wcmein (浪漫鐵人8號 )時間17年前 (2007/07/26 12:39)推噓11(11推 0噓 19→)

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請問一下我利用C++ 藉由 opengl 讀取影像檔我在windows的VC++6.0 下可以讀取可是在mac 的XCode (C++ tool) 下就無法讀取了請問是何種原因以下為source code 取材自opengl超級聖經第二版請問是哪裏有問題 ///// source code 開始 LoadDIBitmap(const char *filename, /* I - File to load */ BITMAPINFO **info) /* O - Bitmap information */ { FILE *fp; /* Open file pointer */ GLubyte *bits; /* Bitmap pixel bits */ int bitsize; /* Size of bitmap */ int infosize; /* Size of header information */ BITMAPFILEHEADER header; /* File header */ /* Try opening the file; use "rb" mode to read this *binary* file. */ if ((fp = fopen(filename, "rb")) == NULL) return (NULL); /* Read the file header and any following bitmap information... */ if (fread(&header, sizeof(BITMAPFILEHEADER), 1, fp) < 1) { /* Couldn't read the file header - return NULL... */ fclose(fp); return (NULL); } if (header.bfType != 'MB') /* Check for BM reversed... */ { /* Not a bitmap file - return NULL... */ fclose(fp); return (NULL); } infosize = header.bfOffBits - sizeof(BITMAPFILEHEADER); if ((*info = (BITMAPINFO *)malloc(infosize)) == NULL) { /* Couldn't allocate memory for bitmap info - return NULL... */ fclose(fp); return (NULL); } if (fread(*info, 1, infosize, fp) < infosize) { /* Couldn't read the bitmap header - return NULL... */ free(*info); fclose(fp); return (NULL); } /* Now that we have all the header info read in, allocate memory for * * the bitmap and read *it* in... */ if ((bitsize = (*info)->bmiHeader.biSizeImage) == 0) bitsize = ((*info)->bmiHeader.biWidth * (*info)->bmiHeader.biBitCount + 7) / 8 * abs((*info)->bmiHeader.biHeight); if ((bits = malloc(bitsize)) == NULL) { /* Couldn't allocate memory - return NULL! */ free(*info); fclose(fp); return (NULL); } if (fread(bits, 1, bitsize, fp) < bitsize) { /* Couldn't read bitmap - free memory and return NULL! */ free(*info); free(bits); fclose(fp); return (NULL); } /* OK, everything went fine - return the allocated bitmap... */ fclose(fp); return (bits); } -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.96.77.105 ※ 編輯: wcmein 來自: 140.96.77.105 (07/26 13:11)

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