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epoger@google.comec3ed6a2011-07-28 14:26:00 +00001/*
2 * Copyright 2011 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 */
reed@android.com8a1c16f2008-12-17 15:59:43 +00007#include "SampleCode.h"
8#include "SkView.h"
9#include "SkCanvas.h"
10#include "SkGraphics.h"
11#include "SkPath.h"
12#include "SkRandom.h"
13#include "SkTime.h"
14
15extern bool SkSetPoly3To3(SkMatrix* matrix, const SkPoint src[3], const SkPoint dst[3]);
16
reed@google.com0faac1e2011-05-11 05:58:58 +000017class PolyToPolyView : public SampleView {
reed@google.com67981c52011-02-17 14:21:01 +000018public:
rmistry@google.comae933ce2012-08-23 18:19:56 +000019 PolyToPolyView() {
reed@android.com8a1c16f2008-12-17 15:59:43 +000020 // tests
21 {
senorblanco@chromium.org64cc5792011-05-19 19:58:58 +000022 SkPoint src[] = { { 0, 0 },
23 { SK_Scalar1, 0 },
24 { 0, SK_Scalar1 } };
25 SkPoint dst[] = { { 0, 0 },
26 { 2*SK_Scalar1, 0 },
27 { 0, 2*SK_Scalar1 } };
reed@android.com8a1c16f2008-12-17 15:59:43 +000028 SkMatrix m1, m2;
reed@google.com67981c52011-02-17 14:21:01 +000029
djsollen@google.comefbe8e92013-02-07 18:58:35 +000030 (void) m1.setPolyToPoly(src, dst, 3);
reed@android.com8a1c16f2008-12-17 15:59:43 +000031
reed@google.com67981c52011-02-17 14:21:01 +000032 m2.reset();
reed@android.com8a1c16f2008-12-17 15:59:43 +000033 m2.set(SkMatrix::kMScaleX, dst[1].fX - dst[0].fX);
34 m2.set(SkMatrix::kMSkewX, dst[2].fX - dst[0].fX);
35 m2.set(SkMatrix::kMTransX, dst[0].fX);
36 m2.set(SkMatrix::kMSkewY, dst[1].fY - dst[0].fY);
37 m2.set(SkMatrix::kMScaleY, dst[2].fY - dst[0].fY);
38 m2.set(SkMatrix::kMTransY, dst[0].fY);
reed@google.com67981c52011-02-17 14:21:01 +000039
reed@android.com8a1c16f2008-12-17 15:59:43 +000040 m1.reset();
reed@google.com67981c52011-02-17 14:21:01 +000041
reed@android.com8a1c16f2008-12-17 15:59:43 +000042 const SkScalar src1[] = {
commit-bot@chromium.org4b413c82013-11-25 19:44:07 +000043 0, 0, 0, 427, 316, 427, 316, 0
reed@android.com8a1c16f2008-12-17 15:59:43 +000044 };
45 const SkScalar dst1[] = {
commit-bot@chromium.org4b413c82013-11-25 19:44:07 +000046 158, 177.5f, 158, 249.5f,
47 158, 604.5f, 158, -177.5f
reed@android.com8a1c16f2008-12-17 15:59:43 +000048 };
reed@google.com67981c52011-02-17 14:21:01 +000049
djsollen@google.comefbe8e92013-02-07 18:58:35 +000050 (void) m2.setPolyToPoly((const SkPoint*)src1, (SkPoint*)dst1, 4);
reed@google.com67981c52011-02-17 14:21:01 +000051
reed@android.com8a1c16f2008-12-17 15:59:43 +000052 {
53 const SkPoint src[] = {
senorblanco@chromium.org64cc5792011-05-19 19:58:58 +000054 { SkIntToScalar(1), SkIntToScalar(0) },
55 { SkIntToScalar(4), SkIntToScalar(7) },
56 { SkIntToScalar(10), SkIntToScalar(2) }
reed@android.com8a1c16f2008-12-17 15:59:43 +000057 };
58 const SkPoint dst[] = {
senorblanco@chromium.org64cc5792011-05-19 19:58:58 +000059 { SkIntToScalar(4), SkIntToScalar(2) },
60 { SkIntToScalar(45), SkIntToScalar(26) },
61 { SkIntToScalar(32), SkIntToScalar(17) }
reed@android.com8a1c16f2008-12-17 15:59:43 +000062 };
reed@google.com67981c52011-02-17 14:21:01 +000063
bsalomon@google.com820e80a2011-10-24 21:09:40 +000064 SkMatrix m0;
reed@android.com8a1c16f2008-12-17 15:59:43 +000065 m0.setPolyToPoly(src, dst, 3);
bsalomon@google.com820e80a2011-10-24 21:09:40 +000066 // SkMatrix m1;
reed@google.com67981c52011-02-17 14:21:01 +000067 // SkSetPoly3To3(&m1, src, dst);
reed@google.com2f3dc9d2011-05-02 17:33:45 +000068 // m0.dump();
69 // m1.dump();
reed@android.com8a1c16f2008-12-17 15:59:43 +000070 }
71 }
72 }
reed@google.com67981c52011-02-17 14:21:01 +000073
reed@android.com8a1c16f2008-12-17 15:59:43 +000074protected:
75 // overrides from SkEventSink
76 virtual bool onQuery(SkEvent* evt) {
77 if (SampleCode::TitleQ(*evt)) {
tfarina@chromium.org45369a32012-09-30 11:30:01 +000078 SampleCode::TitleR(evt, "PolyToPolyView");
reed@android.com8a1c16f2008-12-17 15:59:43 +000079 return true;
80 }
81 return this->INHERITED::onQuery(evt);
82 }
reed@google.com67981c52011-02-17 14:21:01 +000083
reed@android.com8a1c16f2008-12-17 15:59:43 +000084 static void doDraw(SkCanvas* canvas, SkPaint* paint, const int isrc[],
85 const int idst[], int count) {
86 SkMatrix matrix;
87 SkPoint src[4], dst[4];
reed@google.com67981c52011-02-17 14:21:01 +000088
reed@android.com8a1c16f2008-12-17 15:59:43 +000089 for (int i = 0; i < count; i++) {
90 src[i].set(SkIntToScalar(isrc[2*i+0]), SkIntToScalar(isrc[2*i+1]));
91 dst[i].set(SkIntToScalar(idst[2*i+0]), SkIntToScalar(idst[2*i+1]));
92 }
reed@google.com67981c52011-02-17 14:21:01 +000093
reed@android.com8a1c16f2008-12-17 15:59:43 +000094 canvas->save();
95 matrix.setPolyToPoly(src, dst, count);
96 canvas->concat(matrix);
reed@google.com67981c52011-02-17 14:21:01 +000097
reed@android.com8a1c16f2008-12-17 15:59:43 +000098 paint->setColor(SK_ColorGRAY);
99 paint->setStyle(SkPaint::kStroke_Style);
100 const SkScalar D = SkIntToScalar(64);
Mike Reed3661bc92017-02-22 13:21:42 -0500101 canvas->drawRect(SkRect::MakeWH(D, D), *paint);
reed@android.com8a1c16f2008-12-17 15:59:43 +0000102 canvas->drawLine(0, 0, D, D, *paint);
103 canvas->drawLine(0, D, D, 0, *paint);
reed@google.com67981c52011-02-17 14:21:01 +0000104
reed@android.com8a1c16f2008-12-17 15:59:43 +0000105 SkPaint::FontMetrics fm;
106 paint->getFontMetrics(&fm);
107 paint->setColor(SK_ColorRED);
108 paint->setStyle(SkPaint::kFill_Style);
109 SkScalar x = D/2;
110 float y = D/2 - (fm.fAscent + fm.fDescent)/2;
111 SkString str;
112 str.appendS32(count);
Cary Clark2a475ea2017-04-28 15:35:12 -0400113 canvas->drawString(str,
commit-bot@chromium.org4b413c82013-11-25 19:44:07 +0000114 x, y,
robertphillips@google.comc6ce7502012-05-08 13:15:37 +0000115 *paint);
reed@google.com67981c52011-02-17 14:21:01 +0000116
reed@android.com8a1c16f2008-12-17 15:59:43 +0000117 canvas->restore();
118 }
reed@google.com67981c52011-02-17 14:21:01 +0000119
reed@google.com0faac1e2011-05-11 05:58:58 +0000120 virtual void onDrawContent(SkCanvas* canvas) {
reed@android.com8a1c16f2008-12-17 15:59:43 +0000121 SkPaint paint;
122 paint.setAntiAlias(true);
123 paint.setStrokeWidth(SkIntToScalar(4));
124 paint.setTextSize(SkIntToScalar(40));
125 paint.setTextAlign(SkPaint::kCenter_Align);
126
127 canvas->save();
128 canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
129 // translate (1 point)
130 const int src1[] = { 0, 0 };
131 const int dst1[] = { 5, 5 };
132 doDraw(canvas, &paint, src1, dst1, 1);
133 canvas->restore();
reed@google.com67981c52011-02-17 14:21:01 +0000134
reed@android.com8a1c16f2008-12-17 15:59:43 +0000135 canvas->save();
136 canvas->translate(SkIntToScalar(160), SkIntToScalar(10));
137 // rotate/uniform-scale (2 points)
138 const int src2[] = { 32, 32, 64, 32 };
139 const int dst2[] = { 32, 32, 64, 48 };
140 doDraw(canvas, &paint, src2, dst2, 2);
141 canvas->restore();
reed@google.com67981c52011-02-17 14:21:01 +0000142
reed@android.com8a1c16f2008-12-17 15:59:43 +0000143 canvas->save();
144 canvas->translate(SkIntToScalar(10), SkIntToScalar(110));
145 // rotate/skew (3 points)
146 const int src3[] = { 0, 0, 64, 0, 0, 64 };
147 const int dst3[] = { 0, 0, 96, 0, 24, 64 };
148 doDraw(canvas, &paint, src3, dst3, 3);
149 canvas->restore();
reed@google.com67981c52011-02-17 14:21:01 +0000150
reed@android.com8a1c16f2008-12-17 15:59:43 +0000151 canvas->save();
152 canvas->translate(SkIntToScalar(160), SkIntToScalar(110));
153 // perspective (4 points)
154 const int src4[] = { 0, 0, 64, 0, 64, 64, 0, 64 };
155 const int dst4[] = { 0, 0, 96, 0, 64, 96, 0, 64 };
156 doDraw(canvas, &paint, src4, dst4, 4);
157 canvas->restore();
158 }
reed@google.com67981c52011-02-17 14:21:01 +0000159
reed@android.com8a1c16f2008-12-17 15:59:43 +0000160private:
reed@google.com0faac1e2011-05-11 05:58:58 +0000161 typedef SampleView INHERITED;
reed@android.com8a1c16f2008-12-17 15:59:43 +0000162};
163
164//////////////////////////////////////////////////////////////////////////////
165
166static SkView* MyFactory() { return new PolyToPolyView; }
167static SkViewRegister reg(MyFactory);