bmp.rar_BMP 读取_C 读取bmp_bmp RGB_取bmp_读取bmp

#include <memory.h> #include "bmp.h" #ifdef _BMP_TEST_ int main() #else int BMPMain() #endif { LONG w, h; COLORREF* pPixData = NULL; pPixData = ReadBMPData(&w, &h); ShowBMP(w, h, pPixData); return 0; } void ShowBMP(LONG w, LONG h, COLORREF* pData) { int Row, Col; int i = 100; for(Row = 0; Row < h; Row ++) { for(Col = 0; Col < w; Col ++) { if(Row == 0) { printf("0x%06x ", pData[Row * SCREEN_WIDTH + Col]); if((Col + 1) % 6 == 0) printf("\n"); } } } free(pData); } COLORREF* ReadBMPData(LONG* width, LONG* heigh) { BITMAPFILEHEADER bmpFH; BITMAPINFOHEADER bmpInfo; int rgbCount; FILE *pf = NULL; long byteline; int Row; int i; int j; char* pLineData = NULL; char* pImgData = NULL; RGBQUAD* rgb = NULL; BYTE* lineData = NULL; COLORREF* PixData = NULL; pf = fopen("test.bmp", "rb"); rewind(pf); //set to file head fread(&bmpFH, sizeof(BITMAPFILEHEADER), 1, pf); //read BMP File Header fseek(pf, sizeof(BITMAPFILEHEADER), SEEK_SET); fread(&bmpInfo, sizeof(BITMAPINFOHEADER), 1, pf); //read BMP INFO Header *width = bmpInfo.biWidth; *heigh = bmpInfo.biHeight; fseek(pf, bmpFH.bfOffBits, SEEK_SET); //set to Data byteline = (bmpInfo.biWidth * bmpInfo.biBitCount + 31) / 32*4; switch(bmpInfo.biBitCount) { case 1: rgbCount = 2; break; case 4: rgbCount = 16; break; case 8: rgbCount = 256; break; case 24: default: rgbCount = 0; break; } rgb = (RGBQUAD*)malloc(rgbCount * sizeof(RGBQUAD)); if(rgbCount != 0) { for(i = 0; i < rgbCount; i ++) { fread(&(rgb[i]),sizeof(RGBQUAD),1,pf); } fseek(pf, bmpFH.bfOffBits + sizeof(rgb), SEEK_SET); } lineData = (BYTE*)malloc(byteline); // COLORREF* PixData = (COLORREF*)malloc((bmpInfo.biHeight * bmpInfo.biWidth) * sizeof(COLORREF)); PixData = (COLORREF*)malloc((SCREEN_WIDTH * SCREEN_HEIGH) * sizeof(COLORREF)); memset(PixData, 0x00, (SCREEN_WIDTH * SCREEN_HEIGH) * sizeof(COLORREF)); memset(lineData, 0x00, byteline); //read data to memory for(Row = 0; Row < bmpInfo.biHeight; Row ++) { fread(lineData, byteline, 1, pf); i = 0; for(j = 0; j < bmpInfo.biWidth; j ++) { PixData[Row * SCREEN_WIDTH + j] = (lineData[i] << 16) + (lineData[i+1] << 8) + lineData[i+2]; i = i + 3; } } free(lineData); fclose(pf); return PixData; }