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struct surface{
vector<color*> data;
int bpp;//bits per pixel
int bpr;//bytes per row (including alignment)
int transparent;
int transparency;
int delay;
int width,height;
RGBQUAD* palette;
BITMAPINFO* bmi;
surface():bpp(0),width(0),height(0),palette(NULL),bmi(NULL){}
~surface();
int draw(int,int,HDC,unsigned);
bool load(char*);
color& operator()(int,int,unsigned);};
surface::~surface(){
int x=0,size=data.size();
for(;x<size;++x){
delete[] data[x];}
delete[] palette;
delete bmi;}
int surface::draw(int x,int y,HDC hdc,unsigned frame=0){
if(frame>=data.size()){
frame=data.size()-1;}
return SetDIBitsToDevice(hdc,x,y,width,height,0,0,0,height,(void*)&data[frame],bmi,0);}
bool load_bmp(HANDLE file,surface& img){
//---All this stuff is exactly as it was before
DWORD read;
//load file header
BITMAPFILEHEADER bfh;
ReadFile(file,&bfh,sizeof(BITMAPFILEHEADER),&read,NULL);
if(read!=sizeof(BITMAPFILEHEADER)){
SHOWERR("ERROR: Failed to read the BMP file header");
return false;}
if(bfh.bfType!=0x4D42){//'BM'
SHOWERR("ERROR: BMP file is invalid");
return false;}
//load info header
BITMAPINFOHEADER bih;
ReadFile(file,&bih,sizeof(BITMAPINFOHEADER),&read,NULL);
if(read!=sizeof(BITMAPINFOHEADER)){
SHOWERR("ERROR: Failed to read the BMP file header");
return false;}
if(bih.biCompression!=0){
SHOWERR("ERROR: BMP file uses an unsupported form of compression");
return false;}
//---New stuff starts here
RGBQUAD* color_table=NULL;
int size=0;
if(bih.biBitCount<16){
if(bih.biClrUsed==0){
size=1<<bih.biBitCount;
color_table=new RGBQUAD[size];}
else{
size=bih.biClrUsed;
color_table=new RGBQUAD[bih.biClrUsed];}
ReadFile(file,color_table,size,&read,NULL);}
//load data
color* data;
char byte;
short word;
unsigned x,y,z;
unsigned bpr=(bih.biBitCount*bih.biWidth)>>8;
//integer alignment
bpr+=(4-bpr%4)%4;
//support for multiple bpp values
if(bih.biHeight>0){
SetFilePointer(file,bih.biSizeImage-bpr,NULL,FILE_CURRENT);}
switch(bih.biBitCount){
case 1:
data=new color[bih.biSizeImage<<3];
for(z=0;z<bih.biHeight;++z){
for(x=0;x<bih.biWidth;++x){
ReadFile(file,&byte,sizeof(char),&read,NULL);
for(y=0;y<8;++y){
data[(z*bih.biWidth+x)<<3+y]=color_table[GETBIT(byte,y)];}}
//skip end of line buffering
if(bih.biHeight<0){
SetFilePointer(file,bpr-bih.biWidth,NULL,FILE_CURRENT);}
else{
SetFilePointer(file,-bpr-bih.biWidth,NULL,FILE_CURRENT);}}
break;
case 2:
data=new color[bih.biSizeImage<<2];
for(x=0;x<bih.biSizeImage;++x){
ReadFile(file,&byte,sizeof(char),&read,NULL);
for(y=0;y<4;++y){
data[x<<2+y]=color_table[GET2BIT(byte,y)];}}
break;
case 4:
data=new color[bih.biSizeImage<<1];
for(x=0;x<bih.biSizeImage;++x){
ReadFile(file,&byte,sizeof(char),&read,NULL);
data[x<<1]=color_table[HINIBBLE(byte)];
data[x<<1+1]=color_table[LONIBBLE(byte)];}
break;
case 8:
data=new color[bih.biSizeImage];
for(x=0;x<bih.biSizeImage;++x){
ReadFile(file,&byte,sizeof(char),&read,NULL);
data[x]=color_table[byte];}
break;
case 16:
data=new color[bih.biSizeImage>>1];
for(x=0;x<bih.biSizeImage;x+=2){
ReadFile(file,&word,sizeof(short),&read,NULL);
data[x]=wtoc24(word);}
break;
//---Case that is currently being tested
case 24:
case 32:
size=bih.biSizeImage>>2;
data=new color[size];
for(z=0;z<bih.biHeight;++z){
for(x=0;x<bih.biWidth;++x){
ReadFile(file,data+z*bih.biWidth+x,sizeof(color),&read,NULL);}
//skip end of line buffering
ReadFile(file,data+z*bih.biWidth+x,bpr-bih.biWidth,&read,NULL);
if(bih.biHeight>0){
SetFilePointer(file,(-bpr-bih.biWidth)<<1,NULL,FILE_CURRENT);}}
//old
/*size=bih.biSizeImage>>2;
data=new color[size];
ReadFile(file,data,size,&read,NULL);*/
break;
default:
SHOWERR("ERROR: BMP has unsupported BPP value\n\nSupported BPP values:\n\t1\n\t2\n\t4\n\t8\n\t16\n\t24\n\t32");
break;}
//---This stuff was pretty much the same before, too
//fill surface with data
img.bmi=new BITMAPINFO;
img.bmi->bmiHeader=bih;
img.data.push_back(data);
img.bpp=32;
img.width=bih.biWidth;
img.height=(bih.biHeight>0?-bih.biHeight:bih.biHeight);
return true;}
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