回复：Cairo & C语言 & GTK+3.0 & Linux

/* cairo036.c 剪切图片内容 */
#include <cairo.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
static cairo_surface_t *surface = NULL;
struct df_canvas
{
char filename[28];
int type;
double width;
double height;
};
void df_draw_brush (struct df_canvas const *pcanvas)
{
cairo_surface_t* image;
cairo_t *cr;
cr = cairo_create (surface);
cairo_arc (cr, 300.0, 300.0, 150.0, 0, 2 * M_PI);
cairo_clip (cr); /* 以上内容做剪切路径 */
cairo_new_path (cr);
image = cairo_image_surface_create_from_png ("star.png"); /* 读取图片内容 */
cairo_scale (cr, 1.1, 1.1);
cairo_set_source_surface (cr, image, 0, 0);
cairo_paint (cr);
cairo_surface_destroy (image);
cairo_surface_write_to_png (surface, pcanvas -> filename);
cairo_destroy (cr);
}
void df_init_canvas (struct df_canvas const *pcanvas)
{
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, (int) pcanvas -> width, (int) pcanvas -> height);
}
int main (int argc, char *argv[])
{
struct df_canvas *canvas;
canvas = (struct df_canvas*) malloc (sizeof (struct df_canvas));
strncpy(canvas -> filename, "hello.png", 28);
canvas -> type = CAIRO_SURFACE_TYPE_IMAGE;
canvas -> width = 600.0;
canvas -> height = 600.0;
df_init_canvas (canvas);
df_draw_brush (canvas);
free (canvas);
if (surface != NULL) cairo_surface_destroy (surface);
return 0;
}

/* cairo037.c 重复图片 */
#include <cairo.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
static cairo_surface_t *surface = NULL;
struct df_canvas
{
char filename[28];
int type;
double width;
double height;
};
void df_draw_brush (struct df_canvas const *pcanvas)
{
int w, h;
cairo_surface_t *image;
cairo_pattern_t *pattern;
cairo_matrix_t matrix;
cairo_t *cr;
cr = cairo_create (surface);
image = cairo_image_surface_create_from_png ("star.png"); /* 读取图片内容 */
w = cairo_image_surface_get_width (image);
h = cairo_image_surface_get_height (image);
pattern = cairo_pattern_create_for_surface (image);
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
cairo_translate (cr, 0.5 * w, 0.5 * h);
cairo_rotate (cr, 18 * M_PI / 180);
/* cairo_scale (cr, 1.2, 1.2); */
cairo_translate (cr, -0.5 * w, -0.5 * h);
cairo_matrix_init_scale (&matrix, 8.0, 12.0);
cairo_pattern_set_matrix (pattern, &matrix);
cairo_set_source (cr, pattern);
cairo_rectangle (cr, 100, 100, 400.0, 700.0);
cairo_fill (cr);
cairo_surface_destroy (image);
cairo_pattern_destroy (pattern);
cairo_surface_write_to_png (surface, pcanvas -> filename);
cairo_destroy (cr);
}
void df_init_canvas (struct df_canvas const *pcanvas)
{
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, (int) pcanvas -> width, (int) pcanvas -> height);
}
int main (int argc, char *argv[])
{
struct df_canvas *canvas;
canvas = (struct df_canvas*) malloc (sizeof (struct df_canvas));
strncpy(canvas -> filename, "hello.png", 28);
canvas -> type = CAIRO_SURFACE_TYPE_IMAGE;
canvas -> width = 600.0;
canvas -> height = 900.0;
df_init_canvas (canvas);
df_draw_brush (canvas);
free (canvas);
if (surface != NULL) cairo_surface_destroy (surface);
return 0;
}

/* cairo038.c 镜像图片 */
#include <cairo.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
static cairo_surface_t *surface = NULL;
struct df_canvas
{
char filename[28];
int type;
double width;
double height;
};
void df_draw_brush (struct df_canvas const *pcanvas)
{
int w, h;
cairo_surface_t *image;
cairo_pattern_t *pattern;
cairo_matrix_t matrix;
cairo_t *cr;
cr = cairo_create (surface);
image = cairo_image_surface_create_from_png ("star.png"); /* 读取图片内容 */
w = cairo_image_surface_get_width (image);
h = cairo_image_surface_get_height (image);
pattern = cairo_pattern_create_for_surface (image);
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REFLECT); /* CAIRO_EXTEND_PAD */
cairo_translate (cr, 0.5 * w, 0.5 * h);
/* cairo_rotate (cr, 18 * M_PI / 180); */
/* cairo_scale (cr, 1.2, 1.2); */
cairo_translate (cr, -0.5 * w, -0.5 * h);
cairo_matrix_init_scale (&matrix, 1.0, 4.0);
cairo_pattern_set_matrix (pattern, &matrix);
cairo_set_source (cr, pattern);
cairo_rectangle (cr, 0, 0, 600.0, 900.0);
cairo_fill (cr);
cairo_surface_destroy (image);
cairo_pattern_destroy (pattern);
cairo_surface_write_to_png (surface, pcanvas -> filename);
cairo_destroy (cr);
}
void df_init_canvas (struct df_canvas const *pcanvas)
{
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, (int) pcanvas -> width, (int) pcanvas -> height);
}
int main (int argc, char *argv[])
{
struct df_canvas *canvas;
canvas = (struct df_canvas*) malloc (sizeof (struct df_canvas));
strncpy(canvas -> filename, "hello.png", 28);
canvas -> type = CAIRO_SURFACE_TYPE_IMAGE;
canvas -> width = 600.0;
canvas -> height = 900.0;
df_init_canvas (canvas);
df_draw_brush (canvas);
free (canvas);
if (surface != NULL) cairo_surface_destroy (surface);
return 0;
}

/* cairo039.c 分割图片cairo_surface_map_to_image */
#include <cairo.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
static cairo_surface_t *surface = NULL;
struct df_canvas
{
char filename[28];
int type;
double width;
double height;
};
void df_draw_brush (struct df_canvas *pcanvas)
{
cairo_surface_t *image;
cairo_surface_t *gsurface;
int i;
char str[] = "0123456789";
cairo_rectangle_int_t prec = {0, 0, 64, 64};
image = cairo_image_surface_create_from_png ("boom.png"); /* 读取图片 580_64 */
for (i = 0; i < 10; i++)
{
pcanvas -> filename[5] = str[i];
prec.x = i * 64;
gsurface = cairo_surface_map_to_image (image, &prec);
cairo_surface_write_to_png (gsurface, pcanvas -> filename);
}
cairo_surface_destroy (image);
cairo_surface_destroy (gsurface);
}
void df_init_canvas (struct df_canvas const *pcanvas)
{
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, (int) pcanvas -> width, (int) pcanvas -> height);
}
int main (int argc, char *argv[])
{
struct df_canvas *canvas;
canvas = (struct df_canvas*) malloc (sizeof (struct df_canvas));
strncpy(canvas -> filename, "hello0.png", 28);
canvas -> type = CAIRO_SURFACE_TYPE_IMAGE;
canvas -> width = 600.0;
canvas -> height = 370.0;
df_init_canvas (canvas);
df_draw_brush (canvas);
free (canvas);
if (surface != NULL) cairo_surface_destroy (surface);
return 0;
}

C语言 _ XOXO 井字游戏 Tic-Tac-Toe [开源]
http://tieba.baidu.com/p/3970342930
XOXO 井字游戏 源码下载
http://pan.baidu.com/s/1kTAcaLx
C语言 > zzgtkcairo > gtkcairo004.7z

/* cairo040.c 掩模 cairo_mask_surface */
#include <cairo.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
static cairo_surface_t *surface = NULL;
struct df_canvas
{
char filename[28];
int type;
double width;
double height;
};
void df_draw_brush (struct df_canvas *pcanvas)
{
cairo_surface_t *image;
cairo_t *cr;
image = cairo_image_surface_create_from_png ("star.png"); /* 读取图片内容 */
pcanvas -> width = cairo_image_surface_get_width (image);
pcanvas -> height = cairo_image_surface_get_height (image);
/* 创建同图片image大小一致的画布surface */
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, pcanvas -> width, pcanvas -> height);
cr = cairo_create (surface);
cairo_rectangle (cr, 80, 60, 220, 440); /* 长方形掩模 */
cairo_set_source_rgb (cr, 0.7, 0.5, 0.7); /* 长方形填充色 */
cairo_fill_preserve (cr);
cairo_stroke (cr);
cairo_set_source_surface (cr, image, 0, 0);
cairo_mask_surface (cr, surface,0, 0); /* 掩模操作 */
cairo_stroke (cr);
cairo_surface_write_to_png (surface, pcanvas -> filename);
cairo_surface_destroy (image);
cairo_destroy (cr);
}
void df_init_canvas (struct df_canvas const *pcanvas)
{
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, (int) pcanvas -> width, (int) pcanvas -> height);
}
int main (int argc, char *argv[])
{
struct df_canvas *canvas;
canvas = (struct df_canvas*) malloc (sizeof (struct df_canvas));
strncpy(canvas -> filename, "hello.png", 28);
canvas -> type = CAIRO_SURFACE_TYPE_IMAGE;
canvas -> width = 600.0;
canvas -> height = 600.0;
df_init_canvas (canvas);
df_draw_brush (canvas);
free (canvas);
if (surface != NULL) cairo_surface_destroy (surface);
return 0;
}