okie, i am still trying to convert Mr LaMothe''s code to classes.
i managed to get something like this:
this is the header file currently:
class BITMAP_FILE
{
public:
//member functions
int Load_Bitmap_File(char *filename);
int Flip_Bitmap(UCHAR *image, int bytes_per_line, int height);
int Unload_Bitmap_File();
int Copy_Screen(UCHAR *source_bitmap, UCHAR *dest_buffer, int lpitch, int transparent);
private:
BITMAPFILEHEADER bitmapfileheader; // this contains the bitmapfile header
BITMAPINFOHEADER bitmapinfoheader; // this is all the info including the palette
PALETTEENTRY palette[256]; // we will store the palette here
UCHAR *buffer; // this is a pointer to the data
char *filename; //L_B_F
UCHAR *image; //F_B
int bytes_per_line;
int height;
UCHAR *source_bitmap; //C_S
UCHAR *dest_buffer;
int lpitch;
int transparent;
};
previously, i used to call this global function:
Copy_Screen(bitmap24bit.buffer, primary_buffer, primary_lpitch, 0);
where bitmap24bit is part of his BITMAP_FILE_TAG structure.
int BITMAP_FILE::Copy_Screen(UCHAR *source_bitmap, UCHAR *dest_buffer, int lpitch, int transparent)
{
// this function draws the bitmap onto the destination memory surface
// if transparent is 1 then color 0 (8bit) or 0.0.0 (16bit) will be transparent
// note this function does NOT clip, so be carefull!!!
USHORT *dest_addr, // starting address of bitmap in destination
*source_addr; // starting adddress of bitmap data in source
USHORT pixel; // used to hold pixel value
int index, // looping vars
pixel_x,
lpitch_2 = lpitch >> 1; // lpitch in USHORT terms
// compute starting destination address
dest_addr = ((USHORT *)dest_buffer);
// compute the starting source address
source_addr = (USHORT *)*source_bitmap;
// is this bitmap transparent
if (transparent)
{
// copy each line of bitmap into destination with transparency
for (index=0; index<SCREEN_HEIGHT; index++)
{
// copy the memory
for (pixel_x=0; pixel_x<SCREEN_WIDTH; pixel_x++)
{
if ((pixel = source_addr[pixel_x])!=0)
dest_addr[pixel_x] = pixel;
} // end if
// advance all the pointers
dest_addr += lpitch_2;
source_addr += SCREEN_WIDTH;
} // end for index
} // end if
else
{
// non-transparent version
// copy each line of bitmap into destination
int source_bytes_per_line = SCREEN_WIDTH*2;
for (index=0; index < SCREEN_HEIGHT; index++)
{
// copy the memory
memcpy(dest_addr, source_addr, source_bytes_per_line);
// advance all the pointers
dest_addr += lpitch_2;
source_addr += SCREEN_WIDTH;
} // end for index
} // end else
// return success
return(1);
} // end Copy_Screen
now that the structure exists as a class,
how do i modify this member function considering,
1) *source_bitmap is still required? or not?
2) there is part in the function for source address which
i dunno how to modify.
