Re: Multidimensional array member initialization

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#include <iostream>
#include <cstdlib>
#include <stdint.h>

#define u8 uint8_t
#define i8 int8_t
#define u32 uint32_t
#define i32 int32_t
// float 32 bits
#define f32 float

#define S sizeof
#define R return
#define P printf
#define F for

using namespace std;

// one point is 3 32 bits float
struct Color3d{
    f32 r, g, b;
};

class Image{
public:
  u32 height;
  u32 width;
  u8* pxs;
  u32 wmul;

  Image(i32 height, i32 width);
  ~Image();
  Color3d& v(int h, int w);
  int fill (Color3d& color);
  int fill1(Color3d& color);
};

Color3d& Image::v(i32 h, i32 w)
{return (Color3d&) *(pxs+w*S(Color3d)+h*wmul);}

// pixel are square coord: from 0..h-1, 0..w-1
Image::Image(i32 h, i32 w)
{i32 i, g;

 height=0; width=0; pxs=0; wmul=0;
 if(w<=0||h<=0) return;
 g =h*sizeof(Color3d);
 if(g<=0) return;
 g*=w;
 if(g<=0) return;
 pxs=(char*) malloc(g);
 if(pxs==0) return;
 height=h; width=w;
 wmul=width*S(Color3d);
}

Image::~Image(){free(pxs);}

i32 Image::fill(Color3d& color)
{u32 x, y;
 if(pxs==0) R 0;
 F(x=0; x<height; ++x)
    {F(y=0; y<width; ++y)
         (*this).v(x,y)=color;
    }
 R 1;
}

i32 Image::fill1(Color3d& color)
{u32 x, end;
 Color3d *p;
 if(pxs==0) R 0;
 p=(Color3d*) pxs;
 end=height*width;
 F(x=0; x<end; ++x, ++p)
           *p=color;
 R 1;
}

int main(void)
{Color3d h={0.78373, 0.1383, 1-0.78373-0.1383};
 Image g(768, 1024);

 cout << "Inizio\n";
 if(g.pxs==0)
    {cout << "Error\n"; R 0;}
 g.fill1(h);
 cout << "(r,g,b)==(" << g.v(0,0).r << ", "
                      << g.v(0,0).g << ", "
                      << g.v(767,1023).b << ")\n";
 cout << "end\n";
 R 0;
}