void image_file::load_bmp( const string256& str )
{
bmp_header head;
file bmp_file(str);
CRAP_ASSERT_DEBUG( bmp_file.readable(), "BMP File does not exist or is not readable" );
bmp_file.read_bytes( &head, sizeof(head) );
CRAP_ASSERT_DEBUG( head.validate(), "Not a valid BMP-file" );
if( head.size_of_image == 0 )
head.size_of_image = head.width * head.height * 3; // 3 = RGB
if( head.offset == 0 )
head.offset = 54; //default
u8* dat = new u8[ head.size_of_image ];
bmp_file.read_bytes( dat, head.size_of_image );
bmp_file.close();
_dimension.x = head.width;
_dimension.y = head.height;
_format = GL_RGB;
_bpp = 24;
_size = head.width * head.height * 3;
_data = dat;
}
void save()
{
float width = Global_Max.getCoordinateX()*100;
float height = Global_Max.getCoordinateY()*100;
bmp_file((GLint)width, (GLint)height);
return;
}
static void key_callback(unsigned char key, int x, int y)
{
switch(key) {
case 'q': //按下q键退出程序
exit(0);
break;
case 's':
bmp_file(WIDTH, HEIGHT);
break;
default:
break;
}
glutPostRedisplay();
/* this redraws the scene without
waiting for the display callback so that any changes appear
instantly */
}