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      1 /*
      2  * Copyright 2012 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 #include "gm.h"
      9 #include "sk_tool_utils.h"
     10 #include "SkCanvas.h"
     11 #include "SkPath.h"
     12 #include "SkSurface.h"
     13 
     14 #define ZOOM    32
     15 #define SMALL_W 9
     16 #define SMALL_H 3
     17 #define REPEAT_LOOP 5
     18 
     19 static sk_sp<SkSurface> new_surface(int width, int height) {
     20     return SkSurface::MakeRasterN32Premul(width, height);
     21 }
     22 
     23 static void draw_pixel_centers(SkCanvas* canvas) {
     24     SkPaint paint;
     25     paint.setColor(sk_tool_utils::color_to_565(0xFF0088FF));
     26     paint.setAntiAlias(true);
     27 
     28     for (int y = 0; y < SMALL_H; ++y) {
     29         for (int x = 0; x < SMALL_W; ++x) {
     30             canvas->drawCircle(x + 0.5f, y + 0.5f, 1.5f / ZOOM, paint);
     31         }
     32     }
     33 }
     34 
     35 static void draw_fatpath(SkCanvas* canvas, SkSurface* surface, const SkPath& path) {
     36     SkPaint paint;
     37 
     38     surface->getCanvas()->clear(SK_ColorTRANSPARENT);
     39     surface->getCanvas()->drawPath(path, paint);
     40     surface->draw(canvas, 0, 0, nullptr);
     41 
     42     paint.setAntiAlias(true);
     43     paint.setColor(SK_ColorRED);
     44     paint.setStyle(SkPaint::kStroke_Style);
     45     canvas->drawPath(path, paint);
     46 
     47     draw_pixel_centers(canvas);
     48 }
     49 
     50 DEF_SIMPLE_GM(fatpathfill, canvas,
     51               SMALL_W * ZOOM,
     52               SMALL_H * ZOOM * REPEAT_LOOP) {
     53         auto surface(new_surface(SMALL_W, SMALL_H));
     54 
     55         canvas->scale(ZOOM, ZOOM);
     56 
     57         SkPaint paint;
     58         paint.setStyle(SkPaint::kStroke_Style);
     59         paint.setStrokeWidth(SK_Scalar1);
     60 
     61         for (int i = 0; i < REPEAT_LOOP; ++i) {
     62             SkPath line, path;
     63             line.moveTo(1, 2);
     64             line.lineTo(SkIntToScalar(4 + i), 1);
     65             paint.getFillPath(line, &path);
     66             draw_fatpath(canvas, surface.get(), path);
     67 
     68             canvas->translate(0, SMALL_H);
     69         }
     70 }
     71