halcanary | 8b2bc25 | 2015-10-06 09:41:47 -0700 | [diff] [blame] | 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 | |
Brian Osman | ee6aa80 | 2017-07-12 17:26:34 -0400 | [diff] [blame] | 8 | #include "SkAutoPixmapStorage.h" |
| 9 | #include "SkColorPriv.h" |
| 10 | #include "SkImage.h" |
| 11 | #include "SkParsePath.h" |
halcanary | 8b2bc25 | 2015-10-06 09:41:47 -0700 | [diff] [blame] | 12 | #include "SkPath.h" |
Brian Osman | ee6aa80 | 2017-07-12 17:26:34 -0400 | [diff] [blame] | 13 | #include "SkSurface.h" |
halcanary | 8b2bc25 | 2015-10-06 09:41:47 -0700 | [diff] [blame] | 14 | #include "gm.h" |
| 15 | |
Brian Osman | ee6aa80 | 2017-07-12 17:26:34 -0400 | [diff] [blame] | 16 | // GM to test combinations of stroking zero length paths with different caps and other settings |
| 17 | // Variables: |
| 18 | // * Antialiasing: On, Off |
| 19 | // * Caps: Butt, Round, Square |
| 20 | // * Stroke width: 0, 0.9, 1, 1.1, 15, 25 |
| 21 | // * Path form: M, ML, MLZ, MZ |
| 22 | // * Path contours: 1 or 2 |
| 23 | // * Path verbs: Line, Quad, Cubic, Conic |
| 24 | // |
| 25 | // Each test is drawn to a 50x20 offscreen surface, and expected to produce some number (0 - 2) of |
| 26 | // visible pieces of cap geometry. These are counted by scanning horizontally for peaks (blobs). |
caryclark | 1f17ab5 | 2015-12-16 08:53:41 -0800 | [diff] [blame] | 27 | |
Brian Osman | ee6aa80 | 2017-07-12 17:26:34 -0400 | [diff] [blame] | 28 | static bool draw_path_cell(SkCanvas* canvas, SkImage* img, int expectedCaps) { |
| 29 | // Draw the image |
| 30 | canvas->drawImage(img, 0, 0); |
halcanary | 8b2bc25 | 2015-10-06 09:41:47 -0700 | [diff] [blame] | 31 | |
Brian Osman | ee6aa80 | 2017-07-12 17:26:34 -0400 | [diff] [blame] | 32 | int w = img->width(), h = img->height(); |
halcanary | 8b2bc25 | 2015-10-06 09:41:47 -0700 | [diff] [blame] | 33 | |
Brian Osman | ee6aa80 | 2017-07-12 17:26:34 -0400 | [diff] [blame] | 34 | // Read the pixels back |
| 35 | SkImageInfo info = SkImageInfo::MakeN32Premul(w, h); |
| 36 | SkAutoPixmapStorage pmap; |
| 37 | pmap.alloc(info); |
Brian Osman | 2a284de | 2018-06-20 20:59:06 +0000 | [diff] [blame] | 38 | SkAssertResult(img->readPixels(pmap, 0, 0)); |
halcanary | 8b2bc25 | 2015-10-06 09:41:47 -0700 | [diff] [blame] | 39 | |
Brian Osman | ee6aa80 | 2017-07-12 17:26:34 -0400 | [diff] [blame] | 40 | // To account for rasterization differences, we scan the middle two rows [y, y+1] of the image |
| 41 | SkASSERT(h % 2 == 0); |
| 42 | int y = (h - 1) / 2; |
halcanary | 8b2bc25 | 2015-10-06 09:41:47 -0700 | [diff] [blame] | 43 | |
Brian Osman | ee6aa80 | 2017-07-12 17:26:34 -0400 | [diff] [blame] | 44 | bool inBlob = false; |
| 45 | int numBlobs = 0; |
| 46 | for (int x = 0; x < w; ++x) { |
| 47 | // We drew white-on-black. We can look for any non-zero value. Just check red. |
| 48 | // And we care if either row is non-zero, so just add them to simplify everything. |
| 49 | uint32_t v = SkGetPackedR32(*pmap.addr32(x, y)) + SkGetPackedR32(*pmap.addr32(x, y + 1)); |
halcanary | 8b2bc25 | 2015-10-06 09:41:47 -0700 | [diff] [blame] | 50 | |
Brian Osman | ee6aa80 | 2017-07-12 17:26:34 -0400 | [diff] [blame] | 51 | if (!inBlob && v) { |
| 52 | ++numBlobs; |
| 53 | } |
| 54 | inBlob = SkToBool(v); |
caryclark | 1f17ab5 | 2015-12-16 08:53:41 -0800 | [diff] [blame] | 55 | } |
| 56 | |
Brian Osman | ee6aa80 | 2017-07-12 17:26:34 -0400 | [diff] [blame] | 57 | SkPaint outline; |
| 58 | outline.setStyle(SkPaint::kStroke_Style); |
| 59 | if (numBlobs == expectedCaps) { |
| 60 | outline.setColor(0xFF007F00); // Green |
| 61 | } else if (numBlobs > expectedCaps) { |
| 62 | outline.setColor(0xFF7F7F00); // Yellow -- more geometry than expected |
| 63 | } else { |
| 64 | outline.setColor(0xFF7F0000); // Red -- missing some geometry |
caryclark | 1f17ab5 | 2015-12-16 08:53:41 -0800 | [diff] [blame] | 65 | } |
| 66 | |
Brian Osman | ee6aa80 | 2017-07-12 17:26:34 -0400 | [diff] [blame] | 67 | canvas->drawRect(SkRect::MakeWH(w, h), outline); |
| 68 | return numBlobs == expectedCaps; |
| 69 | } |
caryclark | 1f17ab5 | 2015-12-16 08:53:41 -0800 | [diff] [blame] | 70 | |
Brian Osman | ee6aa80 | 2017-07-12 17:26:34 -0400 | [diff] [blame] | 71 | static const SkPaint::Cap kCaps[] = { |
| 72 | SkPaint::kButt_Cap, |
| 73 | SkPaint::kRound_Cap, |
| 74 | SkPaint::kSquare_Cap |
caryclark | 1f17ab5 | 2015-12-16 08:53:41 -0800 | [diff] [blame] | 75 | }; |
| 76 | |
Brian Osman | ee6aa80 | 2017-07-12 17:26:34 -0400 | [diff] [blame] | 77 | static const SkScalar kWidths[] = { 0.0f, 0.9f, 1.0f, 1.1f, 15.0f, 25.0f }; |
caryclark | 1f17ab5 | 2015-12-16 08:53:41 -0800 | [diff] [blame] | 78 | |
Brian Osman | ee6aa80 | 2017-07-12 17:26:34 -0400 | [diff] [blame] | 79 | // Full set of path structures for single contour case (each primitive with and without a close) |
| 80 | static const char* kAllVerbs[] = { |
| 81 | nullptr, |
| 82 | "z ", |
| 83 | "l 0 0 ", |
| 84 | "l 0 0 z ", |
| 85 | "q 0 0 0 0 ", |
| 86 | "q 0 0 0 0 z ", |
| 87 | "c 0 0 0 0 0 0 ", |
| 88 | "c 0 0 0 0 0 0 z ", |
| 89 | "a 0 0 0 0 0 0 0 ", |
| 90 | "a 0 0 0 0 0 0 0 z " |
| 91 | }; |
| 92 | |
| 93 | // Reduced set of path structures for double contour case, to keep total number of cases down |
| 94 | static const char* kSomeVerbs[] = { |
| 95 | nullptr, |
| 96 | "z ", |
| 97 | "l 0 0 ", |
| 98 | "l 0 0 z ", |
| 99 | "q 0 0 0 0 ", |
| 100 | "q 0 0 0 0 z ", |
| 101 | }; |
| 102 | |
| 103 | static const int kCellWidth = 50; |
| 104 | static const int kCellHeight = 20; |
| 105 | static const int kCellPad = 2; |
| 106 | |
| 107 | static const int kNumRows = SK_ARRAY_COUNT(kCaps) * SK_ARRAY_COUNT(kWidths); |
| 108 | static const int kNumColumns = SK_ARRAY_COUNT(kAllVerbs); |
| 109 | static const int kTotalWidth = kNumColumns * (kCellWidth + kCellPad) + kCellPad; |
| 110 | static const int kTotalHeight = kNumRows * (kCellHeight + kCellPad) + kCellPad; |
| 111 | |
| 112 | static const int kDblContourNumColums = SK_ARRAY_COUNT(kSomeVerbs) * SK_ARRAY_COUNT(kSomeVerbs); |
| 113 | static const int kDblContourTotalWidth = kDblContourNumColums * (kCellWidth + kCellPad) + kCellPad; |
| 114 | |
| 115 | // 50% transparent versions of the colors used for positive/negative triage icons on gold.skia.org |
| 116 | static const SkColor kFailureRed = 0x7FE7298A; |
| 117 | static const SkColor kSuccessGreen = 0x7F1B9E77; |
| 118 | |
| 119 | static void draw_zero_length_capped_paths(SkCanvas* canvas, bool aa) { |
| 120 | canvas->translate(kCellPad, kCellPad); |
| 121 | |
| 122 | SkImageInfo info = canvas->imageInfo().makeWH(kCellWidth, kCellHeight); |
| 123 | auto surface = canvas->makeSurface(info); |
| 124 | if (!surface) { |
| 125 | surface = SkSurface::MakeRasterN32Premul(kCellWidth, kCellHeight); |
| 126 | } |
| 127 | |
| 128 | SkPaint paint; |
| 129 | paint.setColor(SK_ColorWHITE); |
| 130 | paint.setAntiAlias(aa); |
| 131 | paint.setStyle(SkPaint::kStroke_Style); |
| 132 | |
| 133 | int numFailedTests = 0; |
| 134 | for (auto cap : kCaps) { |
| 135 | for (auto width : kWidths) { |
| 136 | paint.setStrokeCap(cap); |
| 137 | paint.setStrokeWidth(width); |
| 138 | canvas->save(); |
| 139 | |
| 140 | for (auto verb : kAllVerbs) { |
| 141 | SkString pathStr; |
| 142 | pathStr.appendf("M %f %f ", (kCellWidth - 1) * 0.5f, (kCellHeight - 1) * 0.5f); |
| 143 | if (verb) { |
| 144 | pathStr.append(verb); |
| 145 | } |
| 146 | |
| 147 | SkPath path; |
| 148 | SkParsePath::FromSVGString(pathStr.c_str(), &path); |
| 149 | |
| 150 | surface->getCanvas()->clear(SK_ColorTRANSPARENT); |
| 151 | surface->getCanvas()->drawPath(path, paint); |
| 152 | auto img = surface->makeImageSnapshot(); |
| 153 | |
| 154 | // All cases should draw one cap, except for butt capped, and dangling moves |
| 155 | // (without a verb or close), which shouldn't draw anything. |
| 156 | int expectedCaps = ((SkPaint::kButt_Cap == cap) || !verb) ? 0 : 1; |
| 157 | |
| 158 | if (!draw_path_cell(canvas, img.get(), expectedCaps)) { |
| 159 | ++numFailedTests; |
| 160 | } |
| 161 | canvas->translate(kCellWidth + kCellPad, 0); |
| 162 | } |
| 163 | canvas->restore(); |
| 164 | canvas->translate(0, kCellHeight + kCellPad); |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | canvas->drawColor(numFailedTests > 0 ? kFailureRed : kSuccessGreen); |
| 169 | } |
| 170 | |
| 171 | DEF_SIMPLE_GM_BG(zero_length_paths_aa, canvas, kTotalWidth, kTotalHeight, SK_ColorBLACK) { |
| 172 | draw_zero_length_capped_paths(canvas, true); |
| 173 | } |
| 174 | |
| 175 | DEF_SIMPLE_GM_BG(zero_length_paths_bw, canvas, kTotalWidth, kTotalHeight, SK_ColorBLACK) { |
| 176 | draw_zero_length_capped_paths(canvas, false); |
| 177 | } |
| 178 | |
| 179 | static void draw_zero_length_capped_paths_dbl_contour(SkCanvas* canvas, bool aa) { |
| 180 | canvas->translate(kCellPad, kCellPad); |
| 181 | |
| 182 | SkImageInfo info = canvas->imageInfo().makeWH(kCellWidth, kCellHeight); |
| 183 | auto surface = canvas->makeSurface(info); |
| 184 | if (!surface) { |
| 185 | surface = SkSurface::MakeRasterN32Premul(kCellWidth, kCellHeight); |
| 186 | } |
| 187 | |
| 188 | SkPaint paint; |
| 189 | paint.setColor(SK_ColorWHITE); |
| 190 | paint.setAntiAlias(aa); |
| 191 | paint.setStyle(SkPaint::kStroke_Style); |
| 192 | |
| 193 | int numFailedTests = 0; |
| 194 | for (auto cap : kCaps) { |
| 195 | for (auto width : kWidths) { |
| 196 | paint.setStrokeCap(cap); |
| 197 | paint.setStrokeWidth(width); |
| 198 | canvas->save(); |
| 199 | |
| 200 | for (auto firstVerb : kSomeVerbs) { |
| 201 | for (auto secondVerb : kSomeVerbs) { |
| 202 | int expectedCaps = 0; |
| 203 | |
| 204 | SkString pathStr; |
| 205 | pathStr.append("M 9.5 9.5 "); |
| 206 | if (firstVerb) { |
| 207 | pathStr.append(firstVerb); |
| 208 | ++expectedCaps; |
| 209 | } |
| 210 | pathStr.append("M 40.5 9.5 "); |
| 211 | if (secondVerb) { |
| 212 | pathStr.append(secondVerb); |
| 213 | ++expectedCaps; |
| 214 | } |
| 215 | |
| 216 | SkPath path; |
| 217 | SkParsePath::FromSVGString(pathStr.c_str(), &path); |
| 218 | |
| 219 | surface->getCanvas()->clear(SK_ColorTRANSPARENT); |
| 220 | surface->getCanvas()->drawPath(path, paint); |
| 221 | auto img = surface->makeImageSnapshot(); |
| 222 | |
| 223 | if (SkPaint::kButt_Cap == cap) { |
| 224 | expectedCaps = 0; |
| 225 | } |
| 226 | |
| 227 | if (!draw_path_cell(canvas, img.get(), expectedCaps)) { |
| 228 | ++numFailedTests; |
| 229 | } |
| 230 | canvas->translate(kCellWidth + kCellPad, 0); |
| 231 | } |
| 232 | } |
| 233 | canvas->restore(); |
| 234 | canvas->translate(0, kCellHeight + kCellPad); |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | canvas->drawColor(numFailedTests > 0 ? kFailureRed : kSuccessGreen); |
| 239 | } |
| 240 | |
| 241 | DEF_SIMPLE_GM_BG(zero_length_paths_dbl_aa, canvas, kDblContourTotalWidth, kTotalHeight, |
| 242 | SK_ColorBLACK) { |
| 243 | draw_zero_length_capped_paths_dbl_contour(canvas, true); |
| 244 | } |
| 245 | |
| 246 | DEF_SIMPLE_GM_BG(zero_length_paths_dbl_bw, canvas, kDblContourTotalWidth, kTotalHeight, |
| 247 | SK_ColorBLACK) { |
| 248 | draw_zero_length_capped_paths_dbl_contour(canvas, false); |
| 249 | } |