fatpathfill.cpp revision 1c4029296f518a84ef90095243ba210163a1e1f9
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 "SkCanvas.h" 10#include "SkPath.h" 11#include "SkSurface.h" 12 13#define ZOOM 32 14#define SMALL_W 9 15#define SMALL_H 3 16#define REPEAT_LOOP 5 17 18static SkSurface* new_surface(int width, int height) { 19 return SkSurface::NewRasterN32Premul(width, height); 20} 21 22static void draw_pixel_centers(SkCanvas* canvas) { 23 SkPaint paint; 24 paint.setColor(0xFF0088FF); 25 paint.setAntiAlias(true); 26 27 for (int y = 0; y < SMALL_H; ++y) { 28 for (int x = 0; x < SMALL_W; ++x) { 29 canvas->drawCircle(x + 0.5f, y + 0.5f, 1.5f / ZOOM, paint); 30 } 31 } 32} 33 34static void draw_fatpath(SkCanvas* canvas, SkSurface* surface, 35 const SkPath paths[], int count) { 36 SkPaint paint; 37 38 surface->getCanvas()->clear(SK_ColorTRANSPARENT); 39 for (int i = 0; i < count; ++i) { 40 surface->getCanvas()->drawPath(paths[i], paint); 41 } 42 surface->draw(canvas, 0, 0, NULL); 43 44 paint.setAntiAlias(true); 45 paint.setColor(SK_ColorRED); 46 paint.setStyle(SkPaint::kStroke_Style); 47 for (int j = 0; j < count; ++j) { 48 canvas->drawPath(paths[j], paint); 49 } 50 51 draw_pixel_centers(canvas); 52} 53 54class FatPathFillGM : public skiagm::GM { 55public: 56 FatPathFillGM() {} 57 58protected: 59 60 virtual SkString onShortName() { 61 return SkString("fatpathfill"); 62 } 63 64 virtual SkISize onISize() { 65 return SkISize::Make(SMALL_W * ZOOM, SMALL_H * ZOOM * REPEAT_LOOP); 66 } 67 68 virtual void onDraw(SkCanvas* canvas) { 69 SkAutoTUnref<SkSurface> surface(new_surface(SMALL_W, SMALL_H)); 70 71 canvas->scale(ZOOM, ZOOM); 72 73 SkPaint paint; 74 paint.setStyle(SkPaint::kStroke_Style); 75 paint.setStrokeWidth(SK_Scalar1); 76 77 for (int i = 0; i < REPEAT_LOOP; ++i) { 78 SkPath line, path; 79 line.moveTo(SkIntToScalar(1), SkIntToScalar(2)); 80 line.lineTo(SkIntToScalar(4 + i), SkIntToScalar(1)); 81 paint.getFillPath(line, &path); 82 draw_fatpath(canvas, surface, &path, 1); 83 84 canvas->translate(0, SMALL_H); 85 } 86 } 87 88private: 89 typedef skiagm::GM INHERITED; 90}; 91 92/////////////////////////////////////////////////////////////////////////////// 93 94DEF_GM(return new FatPathFillGM;) 95