1 /*
2  * Copyright 2015 Google Inc.
3  *
4  * Use of this source code is governed by a BSD-style license that can be
5  * found in the LICENSE file.
6  */
7 #include <stdio.h>
8 
9 #include "sk_data.h"
10 #include "sk_image.h"
11 #include "sk_canvas.h"
12 #include "sk_surface.h"
13 #include "sk_paint.h"
14 #include "sk_path.h"
15 
16 static sk_surface_t* make_surface(int32_t w, int32_t h) {
17     sk_imageinfo_t info;
18     info.width = w;
19     info.height = h;
20     info.colorType = sk_colortype_get_default_8888();
21     info.alphaType = PREMUL_SK_ALPHATYPE;
22     return sk_surface_new_raster(&info, NULL);
23 }
24 
25 static void emit_png(const char* path, sk_surface_t* surface) {
26     sk_image_t* image = sk_surface_new_image_snapshot(surface);
27     sk_data_t* data = sk_image_encode(image);
28     sk_image_unref(image);
29     FILE* f = fopen(path, "wb");
30     fwrite(sk_data_get_data(data), sk_data_get_size(data), 1, f);
31     fclose(f);
32     sk_data_unref(data);
33 }
34 
35 void draw(sk_canvas_t* canvas) {
36     sk_paint_t* fill = sk_paint_new();
37     sk_paint_set_color(fill, sk_color_set_argb(0xFF, 0x00, 0x00, 0xFF));
38     sk_canvas_draw_paint(canvas, fill);
39 
40     sk_paint_set_color(fill, sk_color_set_argb(0xFF, 0x00, 0xFF, 0xFF));
41     sk_rect_t rect;
42     rect.left = 100.0f;
43     rect.top = 100.0f;
44     rect.right = 540.0f;
45     rect.bottom = 380.0f;
46     sk_canvas_draw_rect(canvas, &rect, fill);
47 
48     sk_paint_t* stroke = sk_paint_new();
49     sk_paint_set_color(stroke, sk_color_set_argb(0xFF, 0xFF, 0x00, 0x00));
50     sk_paint_set_antialias(stroke, true);
51     sk_paint_set_stroke(stroke, true);
52     sk_paint_set_stroke_width(stroke, 5.0f);
53     sk_path_t* path = sk_path_new();
54 
55     sk_path_move_to(path, 50.0f, 50.0f);
56     sk_path_line_to(path, 590.0f, 50.0f);
57     sk_path_cubic_to(path, -490.0f, 50.0f, 1130.0f, 430.0f, 50.0f, 430.0f);
58     sk_path_line_to(path, 590.0f, 430.0f);
59     sk_canvas_draw_path(canvas, path, stroke);
60 
61     sk_paint_set_color(fill, sk_color_set_argb(0x80, 0x00, 0xFF, 0x00));
62     sk_rect_t rect2;
63     rect2.left = 120.0f;
64     rect2.top = 120.0f;
65     rect2.right = 520.0f;
66     rect2.bottom = 360.0f;
67     sk_canvas_draw_oval(canvas, &rect2, fill);
68 
69     sk_path_delete(path);
70     sk_paint_delete(stroke);
71     sk_paint_delete(fill);
72 }
73 
74 int main() {
75     sk_surface_t* surface = make_surface(640, 480);
76     sk_canvas_t* canvas = sk_surface_get_canvas(surface);
77     draw(canvas);
78     emit_png("skia-c-example.png", surface);
79     sk_surface_unref(surface);
80     return 0;
81 }
82