gm/cgm.c

   1 /*
   2  * Copyright 2014 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
   8 // EXPERIMENTAL EXPERIMENTAL EXPERIMENTAL EXPERIMENTAL
   9 // DO NOT USE -- FOR INTERNAL TESTING ONLY
  10
  11 #include "sk_canvas.h"
  12 #include "sk_data.h"
  13 #include "sk_image.h"
  14 #include "sk_paint.h"
  15 #include "sk_shader.h"
  16 #include "sk_surface.h"
  17
  18 extern void sk_test_c_api(sk_canvas_t*);
  19
  20 #define W   256
  21 #define H   256
  22
  23 static sk_shader_t* make_shader() {
  24     sk_point_t pts[] = { { 0, 0 }, { W, H } };
  25     sk_color_t colors[] = { 0xFF00FF00, 0xFF0000FF };
  26     return sk_shader_new_linear_gradient(pts, colors, NULL, 2, CLAMP_SK_SHADER_TILEMODE, NULL);
  27 }
  28
  29 static void do_draw(sk_canvas_t* canvas) {
  30     sk_paint_t* paint = sk_paint_new();
  31     sk_paint_set_antialias(paint, true);
  32
  33     sk_paint_set_color(paint, 0xFFFFFFFF);
  34     sk_canvas_draw_paint(canvas, paint);
  35
  36     sk_rect_t r = { 10, 10, W - 10, H - 10 };
  37
  38     sk_paint_set_color(paint, 0xFFFF0000);
  39     sk_canvas_draw_rect(canvas, &r, paint);
  40
  41     sk_shader_t* shader = make_shader();
  42     sk_paint_set_shader(paint, shader);
  43     sk_shader_unref(shader);
  44
  45     sk_canvas_draw_oval(canvas, &r, paint);
  46
  47     sk_paint_delete(paint);
  48 }
  49
  50 void sk_test_c_api(sk_canvas_t* canvas) {
  51     do_draw(canvas);
  52
  53     sk_imageinfo_t info = {
  54         W, H, sk_colortype_get_default_8888(), OPAQUE_SK_ALPHATYPE
  55     };
  56     sk_surfaceprops_t surfaceProps = { UNKNOWN_SK_PIXELGEOMETRY };
  57     sk_surface_t* surf = sk_surface_new_raster(&info, &surfaceProps);
  58     do_draw(sk_surface_get_canvas(surf));
  59
  60     sk_image_t* img0 = sk_surface_new_image_snapshot(surf);
  61     sk_surface_unref(surf);
  62
  63     sk_canvas_draw_image(canvas, img0, W + 10, 10, NULL);
  64
  65     sk_data_t* data = sk_image_encode(img0);
  66     sk_image_unref(img0);
  67
  68     sk_image_t* img1 = sk_image_new_from_encoded(data, NULL);
  69     sk_data_unref(data);
  70
  71     if (img1) {
  72         sk_canvas_draw_image(canvas, img1, W/2, H/2, NULL);
  73         sk_image_unref(img1);
  74     }
  75 }
  76
  77