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1、OpenGL中用bmp图片做纹理贴图的三种方法方法一：首先获取位图句柄HBITMAPhBmp=(HBITMAP)::LoadImage(AfxGetResourceHandle(),MAKEINTRESOURCE(IDB_BITMAP1),IMAGE_BITMAP,0,0,LR_CREATEDIBSECTION);然后根据位图句柄得到位图信息BITMAPBM;::GetObject(hBmp,sizeof(BM),&BM);最后根据位图信息中的RGB值建立纹理gluBuild2DMipmaps(GL
2、_TEXTURE_2D,3,BM.bmWidth,BM.bmHeight,GL_BGR_EXT,GL_UNSIGNED_BYTE,BM.bmBits);方法二：首先用OpenGL辅助库获得位图信息AUX_RGBImageRec*TextureImage[1];TextureImage[0]=auxDIBImageLoad("1.bmp");然后建立纹理gluBuild2DMipmaps(GL_TEXTURE_2D,3,TextureImage[0]->sizeX,TextureImage[0]->s
3、izeY,GL_RGB,GL_UNSIGNED_BYTE,TextureImage[0]->data);方法三：从底层做，需要了解bmp文件的结构，首先读取bmp文件结构，包括文件头、信息头和数据，数据用于后面定义纹理longImageWidth=256;longImageHeight=256;GLubyteImage[256][256][3];voidReadHeader(FILE*fp,BITMAPFH*p_bitmapheader,BITMAPIH*p_bitmapinfo){fseek(fp
4、,0,SEEK_SET);fread(&p_bitmapheader->bfType,sizeof(unsignedshort),1,fp);fseek(fp,2,SEEK_SET);fread(&p_bitmapheader->bfSize,sizeof(unsignedlong),1,fp);fseek(fp,6,SEEK_SET);fread(&p_bitmapheader->bfReserved1,sizeof(unsignedshort),1,fp);fseek(fp,8,SEEK_SET
5、);fread(&p_bitmapheader->bfReserved2,sizeof(unsignedshort),1,fp);fseek(fp,10,SEEK_SET);fread(&p_bitmapheader->bfOffBits,sizeof(unsignedlong),1,fp);fseek(fp,14,SEEK_SET);fread(&p_bitmapinfo->biSize,sizeof(unsignedlong),1,fp);fseek(fp,18,SEEK_SET);fread(
6、&p_bitmapinfo->biWidth,sizeof(unsignedlong),1,fp);fseek(fp,22,SEEK_SET);fread(&p_bitmapinfo->biHeight,sizeof(unsignedlong),1,fp);fseek(fp,26,SEEK_SET);fread(&p_bitmapinfo->biPlanes,sizeof(unsignedshort),1,fp);fseek(fp,28,SEEK_SET);fread(&p_bitmapinfo->
7、biBitCount,sizeof(unsignedshort),1,fp);fseek(fp,30,SEEK_SET);fread(&p_bitmapinfo->biCompression,sizeof(unsignedlong),1,fp);fseek(fp,34,SEEK_SET);fread(&p_bitmapinfo->biSizeImage,sizeof(unsignedlong),1,fp);fseek(fp,38,SEEK_SET);fread(&p_bitmapinfo->biXP
8、elsPerMeter,sizeof(unsignedlong),1,fp);fseek(fp,42,SEEK_SET);fread(&p_bitmapinfo->biYPelsPerMeter,sizeof(unsignedlong),1,fp);fseek(fp,46,SEEK_SET);fread(&p_bitmapinfo->biClrUsed,sizeof(unsignedlong),1,fp);fseek(fp,50,SEEK_SET);fread(&p_
