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 8#include "gm.h" 9#include "SkCanvas.h" 10#include "SkImage.h" 11#include "SkRandom.h" 12#include "SkSurface.h" 13 14static SkImage* make_image() { 15 const SkImageInfo info = SkImageInfo::MakeN32Premul(319, 52); 16 SkAutoTUnref<SkSurface> surface(SkSurface::NewRaster(info)); 17 SkCanvas* canvas = surface->getCanvas(); 18 canvas->drawColor(0xFFF8F8F8); 19 20 SkPaint paint; 21 paint.setAntiAlias(true); 22 23 paint.setStyle(SkPaint::kStroke_Style); 24 for (int i = 0; i < 20; ++i) { 25 canvas->drawCircle(-4, 25, 20, paint); 26 canvas->translate(25, 0); 27 } 28 return surface->newImageSnapshot(); 29} 30 31static void test_mip(SkCanvas* canvas) { 32 SkAutoTUnref<SkImage> img(make_image());//SkImage::NewFromData(data)); 33 34 SkPaint paint; 35 const SkRect dst = SkRect::MakeWH(177, 15); 36 37 paint.setTextSize(30); 38 SkString str; 39 str.printf("scale %g %g", dst.width() / img->width(), dst.height() / img->height()); 40// canvas->drawText(str.c_str(), str.size(), 300, 100, paint); 41 42 canvas->translate(20, 20); 43 for (int i = 0; i < 4; ++i) { 44 paint.setFilterQuality(SkFilterQuality(i)); 45 canvas->drawImageRect(img, NULL, dst, &paint); 46 canvas->translate(0, 20); 47 } 48 canvas->drawImage(img, 20, 20, NULL); 49} 50 51class MipMapGM : public skiagm::GM { 52public: 53 MipMapGM() {} 54 55protected: 56 SkString onShortName() override { return SkString("mipmap"); } 57 58 SkISize onISize() override { return SkISize::Make(400, 200); } 59 60 void onDraw(SkCanvas* canvas) override { 61 test_mip(canvas); 62 } 63 64private: 65 typedef skiagm::GM INHERITED; 66}; 67DEF_GM( return new MipMapGM; ) 68 69