Генератор карбоновых обоев

[alkesta]

Код: Выделить всё

/*   carbon.c  */

#include <cairo.h>

#define    WEIGHT         1366   // ширина обоев
#define    HEIGHT          768   // высота обоев
#define    CELL_SIDE_SIZE    3   // размер стороны ячкйки

static void draw_cell(cairo_t *, int x_pos, int y_pos);
static void draw_shadow(cairo_t *);

int main(void)
{
  cairo_surface_t *surface;
  cairo_t *cr;
  int x = 0;
  int y = 0;
  int i = 0;

  surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, WEIGHT, HEIGHT);
  cr = cairo_create(surface);

  cairo_set_source_rgb(cr, 0.1, 0.1, 0.1);
  cairo_rectangle(cr, 0, 0, WEIGHT, HEIGHT);
  cairo_fill (cr);
  while (y < HEIGHT) {
    while (x < WEIGHT) {
      draw_cell(cr, x, y);
      x += (CELL_SIDE_SIZE * 2);
    }
    y += CELL_SIDE_SIZE;
    i += 1;
    if (( i % 2 ))  {
      x = CELL_SIDE_SIZE;
    } else {
      x = 0;
    }

  }
  draw_shadow(cr);

  cairo_surface_write_to_png(surface, "carbon.png");
  cairo_destroy(cr);
  cairo_surface_destroy(surface);

  return 0;
}

static void draw_cell(cairo_t *cr, int x_pos, int y_pos)
{
  cairo_pattern_t *pat;

  pat = cairo_pattern_create_linear(x_pos, y_pos,  x_pos, (y_pos + CELL_SIDE_SIZE));
  cairo_pattern_add_color_stop_rgb(pat, 0.9, 0.5, 0.5, 0.5);
  cairo_pattern_add_color_stop_rgb(pat, 0.1, 0.2, 0.2, 0.2);
  cairo_rectangle(cr, x_pos, y_pos, CELL_SIDE_SIZE, CELL_SIDE_SIZE);
  cairo_set_source(cr, pat);
  cairo_fill(cr);
  cairo_pattern_destroy(pat);
}
static void draw_shadow(cairo_t *cr)
{
  cairo_pattern_t *pat;

  pat = cairo_pattern_create_linear(0, 0,  0, HEIGHT);
  cairo_pattern_add_color_stop_rgba(pat, 0.7, 0, 0, 0, 0);
  cairo_pattern_add_color_stop_rgba(pat, 0.3, 0, 0, 0, 0.3);
  cairo_rectangle(cr, 0, 0, WEIGHT, HEIGHT);
  cairo_set_source(cr, pat);
  cairo_fill(cr);
  cairo_pattern_destroy(pat);
}