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
make_surface(int32_t w,int32_t h)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
emit_png(const char * path,sk_surface_t * surface)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
draw(sk_canvas_t * canvas)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
main()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