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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@google.com8ea69832013-06-21 15:11:40 +00007
reed@google.com67981c52011-02-17 14:21:01 +00008#include "gm.h"
Mike Klein33d20552017-03-22 13:47:51 -04009#include "sk_tool_utils.h"
caryclarkf597c422015-07-28 10:37:53 -070010#include "Resources.h"
bungemand3ebb482015-08-05 13:57:49 -070011#include "SkPath.h"
caryclarkf597c422015-07-28 10:37:53 -070012#include "SkTypeface.h"
reed@google.com67981c52011-02-17 14:21:01 +000013
reed@google.com8ea69832013-06-21 15:11:40 +000014class SkJSCanvas {
15public:
16 SkJSCanvas(SkCanvas* target);
17 ~SkJSCanvas();
reed@google.com67981c52011-02-17 14:21:01 +000018
reed@google.com8ea69832013-06-21 15:11:40 +000019 void save();
20 void restore();
skia.committer@gmail.com020b25b2013-06-22 07:00:58 +000021
reed@google.com8ea69832013-06-21 15:11:40 +000022 double lineWidth;
23 void setLineWidth(double);
skia.committer@gmail.com020b25b2013-06-22 07:00:58 +000024
reed@google.com8ea69832013-06-21 15:11:40 +000025 void beginPath();
26 void moveTo(double x, double y);
27 void lineTo(double x, double y);
28 void closePath();
skia.committer@gmail.com020b25b2013-06-22 07:00:58 +000029
reed@google.com8ea69832013-06-21 15:11:40 +000030 void fill();
31 void stroke();
skia.committer@gmail.com020b25b2013-06-22 07:00:58 +000032
reed@google.com8ea69832013-06-21 15:11:40 +000033 void fillText(const char text[], double x, double y);
34
35private:
36 SkCanvas* fTarget;
37 SkPaint fFillPaint;
38 SkPaint fStrokePaint;
39 SkPath fPath;
40};
41
42SkJSCanvas::SkJSCanvas(SkCanvas* target) : fTarget(target) {
43 fFillPaint.setAntiAlias(true);
caryclark1818acb2015-07-24 12:09:25 -070044 sk_tool_utils::set_portable_typeface(&fFillPaint);
reed@google.com8ea69832013-06-21 15:11:40 +000045 fStrokePaint.setAntiAlias(true);
46 fStrokePaint.setStyle(SkPaint::kStroke_Style);
47 fStrokePaint.setStrokeWidth(SK_Scalar1);
48}
49
50SkJSCanvas::~SkJSCanvas() {}
51
52void SkJSCanvas::save() { fTarget->save(); }
53void SkJSCanvas::restore() { fTarget->restore(); }
54
55void SkJSCanvas::beginPath() { fPath.reset(); }
56void SkJSCanvas::moveTo(double x, double y) {
57 fPath.moveTo(SkDoubleToScalar(x), SkDoubleToScalar(y));
58}
59
60void SkJSCanvas::lineTo(double x, double y) {
61 fPath.lineTo(SkDoubleToScalar(x), SkDoubleToScalar(y));
62}
63
64void SkJSCanvas::closePath() { fPath.close(); }
65
66void SkJSCanvas::fill() {
67 fTarget->drawPath(fPath, fFillPaint);
68}
69
70void SkJSCanvas::stroke() {
71 fStrokePaint.setStrokeWidth(SkDoubleToScalar(lineWidth));
72 fTarget->drawPath(fPath, fStrokePaint);
73}
74
75void SkJSCanvas::fillText(const char text[], double x, double y) {
Cary Clark2a475ea2017-04-28 15:35:12 -040076 fTarget->drawString(text, SkDoubleToScalar(x), SkDoubleToScalar(y), fFillPaint);
reed@google.com8ea69832013-06-21 15:11:40 +000077}
78
79///////////////////////////////////////////////////////////////////////////////
80
81static void dump(const SkPath& path) {
82 const SkRect& r = path.getBounds();
83 SkDebugf("isEmpty %d, bounds [%g %g %g %g]\n", path.isEmpty(),
84 r.fLeft, r.fTop, r.fRight, r.fBottom);
85}
86
87static void test_stroke(SkCanvas* canvas) {
88 if (true) {
89 SkPath path;
90 dump(path);
91 path.reset(); path.moveTo(0, 0);
92 dump(path);
93 path.reset(); path.moveTo(100, 100);
94 dump(path);
95 path.reset(); path.moveTo(0, 0); path.moveTo(100, 100);
96 dump(path);
97 path.reset(); path.moveTo(0, 0); path.lineTo(100, 100);
98 dump(path);
99 path.reset(); path.moveTo(0, 0); path.lineTo(100, 100); path.moveTo(200, 200);
100 dump(path);
101 }
skia.committer@gmail.com020b25b2013-06-22 07:00:58 +0000102
reed@google.com8ea69832013-06-21 15:11:40 +0000103#if 0
104 // TEST 1 - The rectangle as it's expected to look
105 var canvas = document.createElement('canvas');
106 document.body.appendChild(canvas);
107 var ctx = canvas.getContext("2d");
108#else
109 SkJSCanvas ctx(canvas);
110#endif
111
112 ctx.save();
113 ctx.lineWidth = 2;
114 ctx.beginPath();
115 ctx.moveTo(10, 100);
116 ctx.lineTo(150, 100);
117 ctx.lineTo(150, 15);
118 ctx.lineTo(10, 15);
119 ctx.closePath();
skia.committer@gmail.com020b25b2013-06-22 07:00:58 +0000120
reed@google.com8ea69832013-06-21 15:11:40 +0000121 // no extra moveTo here
122 // ctx.moveTo(175, 125);
skia.committer@gmail.com020b25b2013-06-22 07:00:58 +0000123
reed@google.com8ea69832013-06-21 15:11:40 +0000124 ctx.stroke();
125 ctx.restore();
skia.committer@gmail.com020b25b2013-06-22 07:00:58 +0000126
reed@google.com8ea69832013-06-21 15:11:40 +0000127 ctx.fillText("As Expected", 10, 10);
skia.committer@gmail.com020b25b2013-06-22 07:00:58 +0000128
reed@google.com8ea69832013-06-21 15:11:40 +0000129#if 0
130 // TEST 2 - Includes an extra moveTo call before stroke; the rectangle appears larger
131 canvas = document.createElement('canvas');
132 document.body.appendChild(canvas);
133 ctx = canvas.getContext("2d");
134#else
135 canvas->translate(200, 0);
136#endif
137
138 ctx.save();
139 ctx.lineWidth = 2;
140 ctx.beginPath();
141 ctx.moveTo(10, 100);
142 ctx.lineTo(150, 100);
143 ctx.lineTo(150, 15);
144 ctx.lineTo(10, 15);
145 ctx.closePath();
skia.committer@gmail.com020b25b2013-06-22 07:00:58 +0000146
reed@google.com8ea69832013-06-21 15:11:40 +0000147 ctx.moveTo(175, 125);
skia.committer@gmail.com020b25b2013-06-22 07:00:58 +0000148
reed@google.com8ea69832013-06-21 15:11:40 +0000149 ctx.stroke();
150 ctx.restore();
skia.committer@gmail.com020b25b2013-06-22 07:00:58 +0000151
reed@google.com8ea69832013-06-21 15:11:40 +0000152 ctx.fillText("Larger Rectangle", 10, 10);
skia.committer@gmail.com020b25b2013-06-22 07:00:58 +0000153
reed@google.com8ea69832013-06-21 15:11:40 +0000154#if 0
155 // TEST 3 - Identical to test 2 except the line width is 1
156 canvas = document.createElement('canvas');
157 document.body.appendChild(canvas);
158 ctx = canvas.getContext("2d");
159#else
160 canvas->translate(200, 0);
161#endif
162
163 ctx.save();
164 ctx.lineWidth = 1;
165 ctx.beginPath();
166 ctx.moveTo(10, 100);
167 ctx.lineTo(150, 100);
168 ctx.lineTo(150, 15);
169 ctx.lineTo(10, 15);
170 ctx.closePath();
skia.committer@gmail.com020b25b2013-06-22 07:00:58 +0000171
reed@google.com8ea69832013-06-21 15:11:40 +0000172 ctx.moveTo(175, 125);
skia.committer@gmail.com020b25b2013-06-22 07:00:58 +0000173
reed@google.com8ea69832013-06-21 15:11:40 +0000174 ctx.stroke();
175 ctx.restore();
skia.committer@gmail.com020b25b2013-06-22 07:00:58 +0000176
reed@google.com8ea69832013-06-21 15:11:40 +0000177 ctx.fillText("As Expected - line width 1", 10, 10);
178}
179
180class Poly2PolyGM : public skiagm::GM {
reed@google.com67981c52011-02-17 14:21:01 +0000181public:
rmistry@google.comd6176b02012-08-23 18:14:13 +0000182 Poly2PolyGM() {}
183
reed@google.com67981c52011-02-17 14:21:01 +0000184protected:
commit-bot@chromium.orga90c6802014-04-30 13:20:45 +0000185
mtklein36352bf2015-03-25 18:17:31 -0700186 SkString onShortName() override {
reed@google.com67981c52011-02-17 14:21:01 +0000187 return SkString("poly2poly");
188 }
189
mtklein36352bf2015-03-25 18:17:31 -0700190 SkISize onISize() override {
reed@google.com8ea69832013-06-21 15:11:40 +0000191 return SkISize::Make(835, 840);
reed@google.com67981c52011-02-17 14:21:01 +0000192 }
rmistry@google.comd6176b02012-08-23 18:14:13 +0000193
reed@google.com67981c52011-02-17 14:21:01 +0000194 static void doDraw(SkCanvas* canvas, SkPaint* paint, const int isrc[],
195 const int idst[], int count) {
196 SkMatrix matrix;
197 SkPoint src[4], dst[4];
rmistry@google.comd6176b02012-08-23 18:14:13 +0000198
reed@google.com67981c52011-02-17 14:21:01 +0000199 for (int i = 0; i < count; i++) {
200 src[i].set(SkIntToScalar(isrc[2*i+0]), SkIntToScalar(isrc[2*i+1]));
201 dst[i].set(SkIntToScalar(idst[2*i+0]), SkIntToScalar(idst[2*i+1]));
202 }
rmistry@google.comd6176b02012-08-23 18:14:13 +0000203
reed@google.com67981c52011-02-17 14:21:01 +0000204 canvas->save();
205 matrix.setPolyToPoly(src, dst, count);
206 canvas->concat(matrix);
rmistry@google.comd6176b02012-08-23 18:14:13 +0000207
caryclark1e545b62015-07-13 08:19:58 -0700208 paint->setColor(sk_tool_utils::color_to_565(SK_ColorGRAY));
reed@google.com67981c52011-02-17 14:21:01 +0000209 paint->setStyle(SkPaint::kStroke_Style);
Mike Reed3661bc92017-02-22 13:21:42 -0500210 const SkScalar D = 64;
211 canvas->drawRect(SkRect::MakeWH(D, D), *paint);
reed@google.com67981c52011-02-17 14:21:01 +0000212 canvas->drawLine(0, 0, D, D, *paint);
213 canvas->drawLine(0, D, D, 0, *paint);
rmistry@google.comd6176b02012-08-23 18:14:13 +0000214
reed@google.com67981c52011-02-17 14:21:01 +0000215 SkPaint::FontMetrics fm;
216 paint->getFontMetrics(&fm);
217 paint->setColor(SK_ColorRED);
218 paint->setStyle(SkPaint::kFill_Style);
219 SkScalar x = D/2;
bsalomon@google.com72e49b82011-10-27 21:47:03 +0000220 SkScalar y = D/2 - (fm.fAscent + fm.fDescent)/2;
caryclarkf597c422015-07-28 10:37:53 -0700221 uint16_t glyphID = 3; // X
222 canvas->drawText((void*) &glyphID, sizeof(glyphID), x, y, *paint);
reed@google.com67981c52011-02-17 14:21:01 +0000223 canvas->restore();
224 }
rmistry@google.comd6176b02012-08-23 18:14:13 +0000225
caryclarkf597c422015-07-28 10:37:53 -0700226 void onOnceBeforeDraw() override {
bungeman13b9c952016-05-12 10:09:30 -0700227 fEmFace = MakeResourceAsTypeface("/fonts/Em.ttf");
caryclarkf597c422015-07-28 10:37:53 -0700228 }
229
mtklein36352bf2015-03-25 18:17:31 -0700230 void onDraw(SkCanvas* canvas) override {
reed@google.com8ea69832013-06-21 15:11:40 +0000231 if (false) { test_stroke(canvas); return; }
232
reed@google.com67981c52011-02-17 14:21:01 +0000233 SkPaint paint;
234 paint.setAntiAlias(true);
caryclarkf597c422015-07-28 10:37:53 -0700235 paint.setTypeface(fEmFace);
236 paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
reed@google.com67981c52011-02-17 14:21:01 +0000237 paint.setStrokeWidth(SkIntToScalar(4));
238 paint.setTextSize(SkIntToScalar(40));
239 paint.setTextAlign(SkPaint::kCenter_Align);
rmistry@google.comd6176b02012-08-23 18:14:13 +0000240
reed@google.com67981c52011-02-17 14:21:01 +0000241 canvas->save();
242 canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
243 // translate (1 point)
244 const int src1[] = { 0, 0 };
245 const int dst1[] = { 5, 5 };
246 doDraw(canvas, &paint, src1, dst1, 1);
247 canvas->restore();
rmistry@google.comd6176b02012-08-23 18:14:13 +0000248
reed@google.com67981c52011-02-17 14:21:01 +0000249 canvas->save();
250 canvas->translate(SkIntToScalar(160), SkIntToScalar(10));
251 // rotate/uniform-scale (2 points)
252 const int src2[] = { 32, 32, 64, 32 };
253 const int dst2[] = { 32, 32, 64, 48 };
254 doDraw(canvas, &paint, src2, dst2, 2);
255 canvas->restore();
rmistry@google.comd6176b02012-08-23 18:14:13 +0000256
reed@google.com67981c52011-02-17 14:21:01 +0000257 canvas->save();
258 canvas->translate(SkIntToScalar(10), SkIntToScalar(110));
259 // rotate/skew (3 points)
260 const int src3[] = { 0, 0, 64, 0, 0, 64 };
261 const int dst3[] = { 0, 0, 96, 0, 24, 64 };
262 doDraw(canvas, &paint, src3, dst3, 3);
263 canvas->restore();
rmistry@google.comd6176b02012-08-23 18:14:13 +0000264
reed@google.com67981c52011-02-17 14:21:01 +0000265 canvas->save();
266 canvas->translate(SkIntToScalar(160), SkIntToScalar(110));
267 // perspective (4 points)
268 const int src4[] = { 0, 0, 64, 0, 64, 64, 0, 64 };
269 const int dst4[] = { 0, 0, 96, 0, 64, 96, 0, 64 };
270 doDraw(canvas, &paint, src4, dst4, 4);
271 canvas->restore();
272 }
rmistry@google.comd6176b02012-08-23 18:14:13 +0000273
reed@google.com67981c52011-02-17 14:21:01 +0000274private:
reed@google.com8ea69832013-06-21 15:11:40 +0000275 typedef skiagm::GM INHERITED;
bungeman13b9c952016-05-12 10:09:30 -0700276 sk_sp<SkTypeface> fEmFace;
reed@google.com67981c52011-02-17 14:21:01 +0000277};
278
279//////////////////////////////////////////////////////////////////////////////
280
reed@google.com8ea69832013-06-21 15:11:40 +0000281DEF_GM( return new Poly2PolyGM; )