#include <cairo.h>
#include <stdlib.h>
#include <memory.h>
#include <stdio.h>

static void dump_data(unsigned char* data, int width, int height)
{
  int x, y;
  for (y = 0; y < height; ++y) {
    for (x = 0; x < width; ++x) {
      unsigned char* d = data + (y*width + x)*4;
      printf("%02x%02x%02x%02x ", d[0], d[1], d[2], d[3]);
    }
    putchar('\n');
  }
}

int main(int argc, char** argv)
{
  cairo_surface_t* src;
  cairo_surface_t* dest;
  cairo_t* cr;
  cairo_pattern_t* pat;
  cairo_matrix_t matrix = {
    1.0, 0.0,
    0.0, 1.0,
    0.5, 0.0
  };
  
  src = cairo_image_surface_create(CAIRO_FORMAT_RGB24, 10, 10);
  memset(cairo_image_surface_get_data(src), 255, 10*10*4);

  dest = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 10, 10);
  memset(cairo_image_surface_get_data(dest), 0, 10*10*4);

  pat = cairo_pattern_create_for_surface(src);
  cairo_pattern_set_matrix(pat, &matrix);
  cairo_pattern_set_filter(pat, CAIRO_FILTER_BILINEAR);

  cr = cairo_create(dest);
  cairo_set_source(cr, pat);
  cairo_rectangle(cr, 0.0, 0.0, 8.0, 8.0);
  cairo_fill(cr);
  
  dump_data(cairo_image_surface_get_data(dest), 10, 10);
  return 0;
}