#include "Rasterizer.h"

#include <stdio.h>


Rasterizer::Rasterizer(Halftone* halftone)
        :
        fHalftone(halftone),
        fIndex(-1)
{
        fBounds.bottom = -2;
}


Rasterizer::~Rasterizer()
{
}


bool 
Rasterizer::SetBitmap(int x, int y, BBitmap* bitmap, int pageHeight)
{
        fX = x; 
        fY = y;
        
        BRect bounds = bitmap->Bounds();

        fBounds.left = (int)bounds.left;
        fBounds.top = (int)bounds.top;
        fBounds.right = (int)bounds.right;
        fBounds.bottom = (int)bounds.bottom;

        int height = fBounds.bottom - fBounds.top + 1;  

        if (y + height > pageHeight) {
                height = pageHeight - y;
                fBounds.bottom = fBounds.top + height - 1;
        }
                
        if (!get_valid_rect(bitmap, &fBounds))
                return false;

        fWidth = fBounds.right - fBounds.left + 1;
        fHeight = fBounds.bottom - fBounds.top + 1;     
        
        fBPR = bitmap->BytesPerRow();
        fBits = (uchar*)bitmap->Bits();
        // offset to top, left point of rect
        fBits += fBounds.top * fBPR + fBounds.left * 4; 
        
        // XXX why not fX += ...?
        fX = fBounds.left;
        fY += fBounds.top;
        fIndex = fBounds.top;
        return true;
}


bool 
Rasterizer::HasNextLine()
{
        return fIndex <= fBounds.bottom;
}


const void* 
Rasterizer::RasterizeNextLine()
{
        if (!HasNextLine())
                return NULL;

        const void* result;
        result = RasterizeLine(fX, fY, (const ColorRGB32Little*)fBits);
        fBits += fBPR;
        fY ++;
        fIndex ++;
        return result;
}


void
Rasterizer::RasterizeBitmap()
{
        while (HasNextLine())
                RasterizeNextLine();
}