150d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov 250d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov/* 350d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov * Copyright 2014 Google Inc. 450d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov * 550d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov * Use of this source code is governed by a BSD-style license that can be 650d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov * found in the LICENSE file. 750d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov */ 850d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov 950d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov#include "gm.h" 10b3c9d1c33caf325aada244204215eb790c228c12dandov#include "SkGradientShader.h" 11b3c9d1c33caf325aada244204215eb790c228c12dandov#include "SkPatchUtils.h" 12b3c9d1c33caf325aada244204215eb790c228c12dandov 13b3c9d1c33caf325aada244204215eb790c228c12dandovstatic SkShader* make_shader() { 14b3c9d1c33caf325aada244204215eb790c228c12dandov const SkColor colors[] = { 15b3c9d1c33caf325aada244204215eb790c228c12dandov SK_ColorRED, SK_ColorCYAN, SK_ColorGREEN, SK_ColorWHITE, SK_ColorMAGENTA, SK_ColorBLUE, 16b3c9d1c33caf325aada244204215eb790c228c12dandov SK_ColorYELLOW, 17b3c9d1c33caf325aada244204215eb790c228c12dandov }; 18b3c9d1c33caf325aada244204215eb790c228c12dandov const SkPoint pts[] = { { 100.f / 4.f, 0.f }, { 3.f * 100.f / 4.f, 100.f } }; 19b3c9d1c33caf325aada244204215eb790c228c12dandov 202880df2609eba09b555ca37be04b6ad89290c765Tom Hudson return SkGradientShader::CreateLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors), 21b3c9d1c33caf325aada244204215eb790c228c12dandov SkShader::kMirror_TileMode); 22b3c9d1c33caf325aada244204215eb790c228c12dandov} 2350d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov 24b3c9d1c33caf325aada244204215eb790c228c12dandovstatic void draw_control_points(SkCanvas* canvas, const SkPoint cubics[12]) { 25ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov //draw control points 26963137b75c0a1fe91f35e9826742f36309f5e65ddandov SkPaint paint; 27b3c9d1c33caf325aada244204215eb790c228c12dandov SkPoint bottom[SkPatchUtils::kNumPtsCubic]; 28b3c9d1c33caf325aada244204215eb790c228c12dandov SkPatchUtils::getBottomCubic(cubics, bottom); 29b3c9d1c33caf325aada244204215eb790c228c12dandov SkPoint top[SkPatchUtils::kNumPtsCubic]; 30b3c9d1c33caf325aada244204215eb790c228c12dandov SkPatchUtils::getTopCubic(cubics, top); 31b3c9d1c33caf325aada244204215eb790c228c12dandov SkPoint left[SkPatchUtils::kNumPtsCubic]; 32b3c9d1c33caf325aada244204215eb790c228c12dandov SkPatchUtils::getLeftCubic(cubics, left); 33b3c9d1c33caf325aada244204215eb790c228c12dandov SkPoint right[SkPatchUtils::kNumPtsCubic]; 34b3c9d1c33caf325aada244204215eb790c228c12dandov SkPatchUtils::getRightCubic(cubics, right); 35ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 36963137b75c0a1fe91f35e9826742f36309f5e65ddandov paint.setColor(SK_ColorBLACK); 37b3c9d1c33caf325aada244204215eb790c228c12dandov paint.setStrokeWidth(0.5f); 38ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov SkPoint corners[4] = { bottom[0], bottom[3], top[0], top[3] }; 39963137b75c0a1fe91f35e9826742f36309f5e65ddandov canvas->drawPoints(SkCanvas::kLines_PointMode, 4, bottom, paint); 40b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPoints(SkCanvas::kLines_PointMode, 2, bottom + 1, paint); 41963137b75c0a1fe91f35e9826742f36309f5e65ddandov canvas->drawPoints(SkCanvas::kLines_PointMode, 4, top, paint); 42963137b75c0a1fe91f35e9826742f36309f5e65ddandov canvas->drawPoints(SkCanvas::kLines_PointMode, 4, left, paint); 43963137b75c0a1fe91f35e9826742f36309f5e65ddandov canvas->drawPoints(SkCanvas::kLines_PointMode, 4, right, paint); 44ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 45b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPoints(SkCanvas::kLines_PointMode, 2, top + 1, paint); 46b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPoints(SkCanvas::kLines_PointMode, 2, left + 1, paint); 47b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPoints(SkCanvas::kLines_PointMode, 2, right + 1, paint); 48ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 49963137b75c0a1fe91f35e9826742f36309f5e65ddandov paint.setStrokeWidth(2); 50ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 51963137b75c0a1fe91f35e9826742f36309f5e65ddandov paint.setColor(SK_ColorRED); 52963137b75c0a1fe91f35e9826742f36309f5e65ddandov canvas->drawPoints(SkCanvas::kPoints_PointMode, 4, corners, paint); 53ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 54963137b75c0a1fe91f35e9826742f36309f5e65ddandov paint.setColor(SK_ColorBLUE); 55b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, bottom + 1, paint); 56ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 57963137b75c0a1fe91f35e9826742f36309f5e65ddandov paint.setColor(SK_ColorCYAN); 58b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, top + 1, paint); 59ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 60963137b75c0a1fe91f35e9826742f36309f5e65ddandov paint.setColor(SK_ColorYELLOW); 61b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, left + 1, paint); 62ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 63963137b75c0a1fe91f35e9826742f36309f5e65ddandov paint.setColor(SK_ColorGREEN); 64b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, right + 1, paint); 65ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov} 66ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 672880df2609eba09b555ca37be04b6ad89290c765Tom HudsonDEF_SIMPLE_GM(patch_primitive, canvas, 800, 800) { 6850d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov SkPaint paint; 69963137b75c0a1fe91f35e9826742f36309f5e65ddandov 70963137b75c0a1fe91f35e9826742f36309f5e65ddandov // The order of the colors and points is clockwise starting at upper-left corner. 71b3c9d1c33caf325aada244204215eb790c228c12dandov const SkPoint cubics[SkPatchUtils::kNumCtrlPts] = { 72963137b75c0a1fe91f35e9826742f36309f5e65ddandov //top points 73b3c9d1c33caf325aada244204215eb790c228c12dandov {100,100},{150,50},{250,150}, {300,100}, 74963137b75c0a1fe91f35e9826742f36309f5e65ddandov //right points 75b3c9d1c33caf325aada244204215eb790c228c12dandov {250, 150},{350,250}, 76963137b75c0a1fe91f35e9826742f36309f5e65ddandov //bottom points 77b3c9d1c33caf325aada244204215eb790c228c12dandov {300,300},{250,250},{150,350},{100,300}, 78963137b75c0a1fe91f35e9826742f36309f5e65ddandov //left points 79b3c9d1c33caf325aada244204215eb790c228c12dandov {50,250},{150,150} 8050d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov }; 8150d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov 82b3c9d1c33caf325aada244204215eb790c228c12dandov const SkColor colors[SkPatchUtils::kNumCorners] = { 83b3c9d1c33caf325aada244204215eb790c228c12dandov SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorCYAN 84b3c9d1c33caf325aada244204215eb790c228c12dandov }; 85b3c9d1c33caf325aada244204215eb790c228c12dandov const SkPoint texCoords[SkPatchUtils::kNumCorners] = { 86b3c9d1c33caf325aada244204215eb790c228c12dandov {0.0f, 0.0f}, {100.0f, 0.0f}, {100.0f,100.0f}, {0.0f, 100.0f}} 87b3c9d1c33caf325aada244204215eb790c228c12dandov ; 88963137b75c0a1fe91f35e9826742f36309f5e65ddandov 89b3c9d1c33caf325aada244204215eb790c228c12dandov const SkXfermode::Mode modes[] = { 90b3c9d1c33caf325aada244204215eb790c228c12dandov SkXfermode::kSrc_Mode, 91b3c9d1c33caf325aada244204215eb790c228c12dandov SkXfermode::kDst_Mode, 92b3c9d1c33caf325aada244204215eb790c228c12dandov SkXfermode::kModulate_Mode, 93b3c9d1c33caf325aada244204215eb790c228c12dandov }; 94963137b75c0a1fe91f35e9826742f36309f5e65ddandov 95b3c9d1c33caf325aada244204215eb790c228c12dandov SkAutoTUnref<SkShader> shader(make_shader()); 96b3c9d1c33caf325aada244204215eb790c228c12dandov 97b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->save(); 98b3c9d1c33caf325aada244204215eb790c228c12dandov for (int y = 0; y < 3; y++) { 99b3c9d1c33caf325aada244204215eb790c228c12dandov SkAutoTUnref<SkXfermode> xfer(SkXfermode::Create(modes[y])); 100b3c9d1c33caf325aada244204215eb790c228c12dandov 101b3c9d1c33caf325aada244204215eb790c228c12dandov for (int x = 0; x < 4; x++) { 102b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->save(); 103b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->translate(x * 350.0f, y * 350.0f); 104b3c9d1c33caf325aada244204215eb790c228c12dandov switch (x) { 105b3c9d1c33caf325aada244204215eb790c228c12dandov case 0: 1062880df2609eba09b555ca37be04b6ad89290c765Tom Hudson canvas->drawPatch(cubics, nullptr, nullptr, xfer, paint); 107b3c9d1c33caf325aada244204215eb790c228c12dandov break; 108b3c9d1c33caf325aada244204215eb790c228c12dandov case 1: 1092880df2609eba09b555ca37be04b6ad89290c765Tom Hudson canvas->drawPatch(cubics, colors, nullptr, xfer, paint); 110b3c9d1c33caf325aada244204215eb790c228c12dandov break; 111b3c9d1c33caf325aada244204215eb790c228c12dandov case 2: 112b3c9d1c33caf325aada244204215eb790c228c12dandov paint.setShader(shader); 1132880df2609eba09b555ca37be04b6ad89290c765Tom Hudson canvas->drawPatch(cubics, nullptr, texCoords, xfer, paint); 1142880df2609eba09b555ca37be04b6ad89290c765Tom Hudson paint.setShader(nullptr); 115b3c9d1c33caf325aada244204215eb790c228c12dandov break; 116b3c9d1c33caf325aada244204215eb790c228c12dandov case 3: 117b3c9d1c33caf325aada244204215eb790c228c12dandov paint.setShader(shader); 118b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPatch(cubics, colors, texCoords, xfer, paint); 1192880df2609eba09b555ca37be04b6ad89290c765Tom Hudson paint.setShader(nullptr); 120b3c9d1c33caf325aada244204215eb790c228c12dandov break; 121b3c9d1c33caf325aada244204215eb790c228c12dandov default: 122b3c9d1c33caf325aada244204215eb790c228c12dandov break; 123b3c9d1c33caf325aada244204215eb790c228c12dandov } 124b3c9d1c33caf325aada244204215eb790c228c12dandov 125b3c9d1c33caf325aada244204215eb790c228c12dandov draw_control_points(canvas, cubics); 126b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->restore(); 127b3c9d1c33caf325aada244204215eb790c228c12dandov } 128ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov } 129ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov canvas->restore(); 13050d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov} 131