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 #define ABORT_TEST(r, cond, ...) \
9 do { \
10 if (cond) { \
11 REPORT_FAILURE(r, #cond, SkStringPrintf(__VA_ARGS__)); \
12 return; \
13 } \
14 } while (0)
15
16 #include "include/core/SkBitmap.h"
17 #include "include/core/SkCanvas.h"
18 #include "include/core/SkColorFilter.h"
19 #include "include/core/SkData.h"
20 #include "include/core/SkImage.h"
21 #include "include/core/SkShader.h"
22 #include "include/core/SkStream.h"
23 #include "include/core/SkTextBlob.h"
24 #include "include/private/SkTo.h"
25 #include "include/svg/SkSVGCanvas.h"
26 #include "include/utils/SkParse.h"
27 #include "src/core/SkMakeUnique.h"
28 #include "src/shaders/SkImageShader.h"
29 #include "tests/Test.h"
30 #include "tools/ToolUtils.h"
31
32 #include <string.h>
33
34 #ifdef SK_XML
35
36 #include "src/svg/SkSVGDevice.h"
37 #include "src/xml/SkDOM.h"
38 #include "src/xml/SkXMLWriter.h"
39
MakeDOMCanvas(SkDOM * dom,uint32_t flags=0)40 static std::unique_ptr<SkCanvas> MakeDOMCanvas(SkDOM* dom, uint32_t flags = 0) {
41 auto svgDevice = SkSVGDevice::Make(SkISize::Make(100, 100),
42 skstd::make_unique<SkXMLParserWriter>(dom->beginParsing()),
43 flags);
44 return svgDevice ? skstd::make_unique<SkCanvas>(svgDevice)
45 : nullptr;
46 }
47
48 namespace {
49
50
check_text_node(skiatest::Reporter * reporter,const SkDOM & dom,const SkDOM::Node * root,const SkPoint & offset,unsigned scalarsPerPos,const char * txt,const char * expected)51 void check_text_node(skiatest::Reporter* reporter,
52 const SkDOM& dom,
53 const SkDOM::Node* root,
54 const SkPoint& offset,
55 unsigned scalarsPerPos,
56 const char* txt,
57 const char* expected) {
58 if (root == nullptr) {
59 ERRORF(reporter, "root element not found.");
60 return;
61 }
62
63 const SkDOM::Node* textElem = dom.getFirstChild(root, "text");
64 if (textElem == nullptr) {
65 ERRORF(reporter, "<text> element not found.");
66 return;
67 }
68 REPORTER_ASSERT(reporter, dom.getType(textElem) == SkDOM::kElement_Type);
69
70 const SkDOM::Node* textNode= dom.getFirstChild(textElem);
71 REPORTER_ASSERT(reporter, textNode != nullptr);
72 if (textNode != nullptr) {
73 REPORTER_ASSERT(reporter, dom.getType(textNode) == SkDOM::kText_Type);
74 REPORTER_ASSERT(reporter, strcmp(expected, dom.getName(textNode)) == 0);
75 }
76
77 int textLen = SkToInt(strlen(expected));
78
79 const char* x = dom.findAttr(textElem, "x");
80 REPORTER_ASSERT(reporter, x != nullptr);
81 if (x != nullptr) {
82 int xposCount = textLen;
83 REPORTER_ASSERT(reporter, SkParse::Count(x) == xposCount);
84
85 SkAutoTMalloc<SkScalar> xpos(xposCount);
86 SkParse::FindScalars(x, xpos.get(), xposCount);
87 if (scalarsPerPos < 1) {
88 // For default-positioned text, we cannot make any assumptions regarding
89 // the first glyph position when the string has leading whitespace (to be stripped).
90 if (txt[0] != ' ' && txt[0] != '\t') {
91 REPORTER_ASSERT(reporter, xpos[0] == offset.x());
92 }
93 } else {
94 for (int i = 0; i < xposCount; ++i) {
95 REPORTER_ASSERT(reporter, xpos[i] == SkIntToScalar(expected[i]));
96 }
97 }
98 }
99
100 const char* y = dom.findAttr(textElem, "y");
101 REPORTER_ASSERT(reporter, y != nullptr);
102 if (y != nullptr) {
103 int yposCount = (scalarsPerPos < 2) ? 1 : textLen;
104 REPORTER_ASSERT(reporter, SkParse::Count(y) == yposCount);
105
106 SkAutoTMalloc<SkScalar> ypos(yposCount);
107 SkParse::FindScalars(y, ypos.get(), yposCount);
108 if (scalarsPerPos < 2) {
109 REPORTER_ASSERT(reporter, ypos[0] == offset.y());
110 } else {
111 for (int i = 0; i < yposCount; ++i) {
112 REPORTER_ASSERT(reporter, ypos[i] == 150 - SkIntToScalar(expected[i]));
113 }
114 }
115 }
116 }
117
test_whitespace_pos(skiatest::Reporter * reporter,const char * txt,const char * expected)118 void test_whitespace_pos(skiatest::Reporter* reporter,
119 const char* txt,
120 const char* expected) {
121 size_t len = strlen(txt);
122
123 SkDOM dom;
124 SkPaint paint;
125 SkFont font(ToolUtils::create_portable_typeface());
126 SkPoint offset = SkPoint::Make(10, 20);
127
128 {
129 MakeDOMCanvas(&dom)->drawSimpleText(txt, len, SkTextEncoding::kUTF8,
130 offset.x(), offset.y(), font, paint);
131 }
132 check_text_node(reporter, dom, dom.finishParsing(), offset, 0, txt, expected);
133
134 {
135 SkAutoTMalloc<SkScalar> xpos(len);
136 for (int i = 0; i < SkToInt(len); ++i) {
137 xpos[i] = SkIntToScalar(txt[i]);
138 }
139
140 auto blob = SkTextBlob::MakeFromPosTextH(txt, len, &xpos[0], offset.y(), font);
141 MakeDOMCanvas(&dom)->drawTextBlob(blob, 0, 0, paint);
142 }
143 check_text_node(reporter, dom, dom.finishParsing(), offset, 1, txt, expected);
144
145 {
146 SkAutoTMalloc<SkPoint> pos(len);
147 for (int i = 0; i < SkToInt(len); ++i) {
148 pos[i] = SkPoint::Make(SkIntToScalar(txt[i]), 150 - SkIntToScalar(txt[i]));
149 }
150
151 auto blob = SkTextBlob::MakeFromPosText(txt, len, &pos[0], font);
152 MakeDOMCanvas(&dom)->drawTextBlob(blob, 0, 0, paint);
153 }
154 check_text_node(reporter, dom, dom.finishParsing(), offset, 2, txt, expected);
155 }
156
157 } // namespace
158
DEF_TEST(SVGDevice_whitespace_pos,reporter)159 DEF_TEST(SVGDevice_whitespace_pos, reporter) {
160 static const struct {
161 const char* tst_in;
162 const char* tst_out;
163 } tests[] = {
164 { "abcd" , "abcd" },
165 { "ab cd" , "ab cd" },
166 { "ab \t\t cd", "ab cd" },
167 { " abcd" , "abcd" },
168 { " abcd" , "abcd" },
169 { " \t\t abcd", "abcd" },
170 { "abcd " , "abcd " }, // we allow one trailing whitespace char
171 { "abcd " , "abcd " }, // because it makes no difference and
172 { "abcd\t " , "abcd " }, // simplifies the implementation
173 { "\t\t \t ab \t\t \t cd \t\t \t ", "ab cd " },
174 };
175
176 for (unsigned i = 0; i < SK_ARRAY_COUNT(tests); ++i) {
177 test_whitespace_pos(reporter, tests[i].tst_in, tests[i].tst_out);
178 }
179 }
180
SetImageShader(SkPaint * paint,int imageWidth,int imageHeight,SkTileMode xTile,SkTileMode yTile)181 void SetImageShader(SkPaint* paint, int imageWidth, int imageHeight, SkTileMode xTile,
182 SkTileMode yTile) {
183 auto surface = SkSurface::MakeRasterN32Premul(imageWidth, imageHeight);
184 paint->setShader(surface->makeImageSnapshot()->makeShader(xTile, yTile, nullptr));
185 }
186
187 // Attempt to find the three nodes on which we have expectations:
188 // the pattern node, the image within that pattern, and the rect which
189 // uses the pattern as a fill.
190 // returns false if not all nodes are found.
FindImageShaderNodes(skiatest::Reporter * reporter,const SkDOM * dom,const SkDOM::Node * root,const SkDOM::Node ** patternOut,const SkDOM::Node ** imageOut,const SkDOM::Node ** rectOut)191 bool FindImageShaderNodes(skiatest::Reporter* reporter, const SkDOM* dom, const SkDOM::Node* root,
192 const SkDOM::Node** patternOut, const SkDOM::Node** imageOut,
193 const SkDOM::Node** rectOut) {
194 if (root == nullptr || dom == nullptr) {
195 ERRORF(reporter, "root element not found");
196 return false;
197 }
198
199
200 const SkDOM::Node* rect = dom->getFirstChild(root, "rect");
201 if (rect == nullptr) {
202 ERRORF(reporter, "rect not found");
203 return false;
204 }
205 *rectOut = rect;
206
207 const SkDOM::Node* defs = dom->getFirstChild(root, "defs");
208 if (defs == nullptr) {
209 ERRORF(reporter, "defs not found");
210 return false;
211 }
212
213 const SkDOM::Node* pattern = dom->getFirstChild(defs, "pattern");
214 if (pattern == nullptr) {
215 ERRORF(reporter, "pattern not found");
216 return false;
217 }
218 *patternOut = pattern;
219
220 const SkDOM::Node* image = dom->getFirstChild(pattern, "image");
221 if (image == nullptr) {
222 ERRORF(reporter, "image not found");
223 return false;
224 }
225 *imageOut = image;
226
227 return true;
228 }
229
ImageShaderTestSetup(SkDOM * dom,SkPaint * paint,int imageWidth,int imageHeight,int rectWidth,int rectHeight,SkTileMode xTile,SkTileMode yTile)230 void ImageShaderTestSetup(SkDOM* dom, SkPaint* paint, int imageWidth, int imageHeight,
231 int rectWidth, int rectHeight, SkTileMode xTile, SkTileMode yTile) {
232 SetImageShader(paint, imageWidth, imageHeight, xTile, yTile);
233 auto svgCanvas = MakeDOMCanvas(dom);
234
235 SkRect bounds{0, 0, SkIntToScalar(rectWidth), SkIntToScalar(rectHeight)};
236 svgCanvas->drawRect(bounds, *paint);
237 }
238
239
DEF_TEST(SVGDevice_image_shader_norepeat,reporter)240 DEF_TEST(SVGDevice_image_shader_norepeat, reporter) {
241 SkDOM dom;
242 SkPaint paint;
243 int imageWidth = 3, imageHeight = 3;
244 int rectWidth = 10, rectHeight = 10;
245 ImageShaderTestSetup(&dom, &paint, imageWidth, imageHeight, rectWidth, rectHeight,
246 SkTileMode::kClamp, SkTileMode::kClamp);
247
248 const SkDOM::Node* root = dom.finishParsing();
249
250 const SkDOM::Node *patternNode, *imageNode, *rectNode;
251 bool structureAppropriate =
252 FindImageShaderNodes(reporter, &dom, root, &patternNode, &imageNode, &rectNode);
253 REPORTER_ASSERT(reporter, structureAppropriate);
254
255 // the image should always maintain its size.
256 REPORTER_ASSERT(reporter, atoi(dom.findAttr(imageNode, "width")) == imageWidth);
257 REPORTER_ASSERT(reporter, atoi(dom.findAttr(imageNode, "height")) == imageHeight);
258
259 // making the pattern as large as the container prevents
260 // it from repeating.
261 REPORTER_ASSERT(reporter, strcmp(dom.findAttr(patternNode, "width"), "100%") == 0);
262 REPORTER_ASSERT(reporter, strcmp(dom.findAttr(patternNode, "height"), "100%") == 0);
263 }
264
DEF_TEST(SVGDevice_image_shader_tilex,reporter)265 DEF_TEST(SVGDevice_image_shader_tilex, reporter) {
266 SkDOM dom;
267 SkPaint paint;
268 int imageWidth = 3, imageHeight = 3;
269 int rectWidth = 10, rectHeight = 10;
270 ImageShaderTestSetup(&dom, &paint, imageWidth, imageHeight, rectWidth, rectHeight,
271 SkTileMode::kRepeat, SkTileMode::kClamp);
272
273 const SkDOM::Node* root = dom.finishParsing();
274 const SkDOM::Node* innerSvg = dom.getFirstChild(root, "svg");
275 if (innerSvg == nullptr) {
276 ERRORF(reporter, "inner svg element not found");
277 return;
278 }
279
280 const SkDOM::Node *patternNode, *imageNode, *rectNode;
281 bool structureAppropriate =
282 FindImageShaderNodes(reporter, &dom, innerSvg, &patternNode, &imageNode, &rectNode);
283 REPORTER_ASSERT(reporter, structureAppropriate);
284
285 // the imageNode should always maintain its size.
286 REPORTER_ASSERT(reporter, atoi(dom.findAttr(imageNode, "width")) == imageWidth);
287 REPORTER_ASSERT(reporter, atoi(dom.findAttr(imageNode, "height")) == imageHeight);
288
289 // if the patternNode width matches the imageNode width,
290 // it will repeat in along the x axis.
291 REPORTER_ASSERT(reporter, atoi(dom.findAttr(patternNode, "width")) == imageWidth);
292 REPORTER_ASSERT(reporter, strcmp(dom.findAttr(patternNode, "height"), "100%") == 0);
293 }
294
DEF_TEST(SVGDevice_image_shader_tiley,reporter)295 DEF_TEST(SVGDevice_image_shader_tiley, reporter) {
296 SkDOM dom;
297 SkPaint paint;
298 int imageNodeWidth = 3, imageNodeHeight = 3;
299 int rectNodeWidth = 10, rectNodeHeight = 10;
300 ImageShaderTestSetup(&dom, &paint, imageNodeWidth, imageNodeHeight, rectNodeWidth,
301 rectNodeHeight, SkTileMode::kClamp, SkTileMode::kRepeat);
302
303 const SkDOM::Node* root = dom.finishParsing();
304 const SkDOM::Node* innerSvg = dom.getFirstChild(root, "svg");
305 if (innerSvg == nullptr) {
306 ERRORF(reporter, "inner svg element not found");
307 return;
308 }
309
310 const SkDOM::Node *patternNode, *imageNode, *rectNode;
311 bool structureAppropriate =
312 FindImageShaderNodes(reporter, &dom, innerSvg, &patternNode, &imageNode, &rectNode);
313 REPORTER_ASSERT(reporter, structureAppropriate);
314
315 // the imageNode should always maintain its size.
316 REPORTER_ASSERT(reporter, atoi(dom.findAttr(imageNode, "width")) == imageNodeWidth);
317 REPORTER_ASSERT(reporter, atoi(dom.findAttr(imageNode, "height")) == imageNodeHeight);
318
319 // making the patternNode as large as the container prevents
320 // it from repeating.
321 REPORTER_ASSERT(reporter, strcmp(dom.findAttr(patternNode, "width"), "100%") == 0);
322 REPORTER_ASSERT(reporter, atoi(dom.findAttr(patternNode, "height")) == imageNodeHeight);
323 }
324
DEF_TEST(SVGDevice_image_shader_tileboth,reporter)325 DEF_TEST(SVGDevice_image_shader_tileboth, reporter) {
326 SkDOM dom;
327 SkPaint paint;
328 int imageWidth = 3, imageHeight = 3;
329 int rectWidth = 10, rectHeight = 10;
330 ImageShaderTestSetup(&dom, &paint, imageWidth, imageHeight, rectWidth, rectHeight,
331 SkTileMode::kRepeat, SkTileMode::kRepeat);
332
333 const SkDOM::Node* root = dom.finishParsing();
334
335 const SkDOM::Node *patternNode, *imageNode, *rectNode;
336 const SkDOM::Node* innerSvg = dom.getFirstChild(root, "svg");
337 if (innerSvg == nullptr) {
338 ERRORF(reporter, "inner svg element not found");
339 return;
340 }
341 bool structureAppropriate =
342 FindImageShaderNodes(reporter, &dom, innerSvg, &patternNode, &imageNode, &rectNode);
343 REPORTER_ASSERT(reporter, structureAppropriate);
344
345 // the imageNode should always maintain its size.
346 REPORTER_ASSERT(reporter, atoi(dom.findAttr(imageNode, "width")) == imageWidth);
347 REPORTER_ASSERT(reporter, atoi(dom.findAttr(imageNode, "height")) == imageHeight);
348
349 REPORTER_ASSERT(reporter, atoi(dom.findAttr(patternNode, "width")) == imageWidth);
350 REPORTER_ASSERT(reporter, atoi(dom.findAttr(patternNode, "height")) == imageHeight);
351 }
352
DEF_TEST(SVGDevice_ColorFilters,reporter)353 DEF_TEST(SVGDevice_ColorFilters, reporter) {
354 SkDOM dom;
355 SkPaint paint;
356 paint.setColorFilter(SkColorFilters::Blend(SK_ColorRED, SkBlendMode::kSrcIn));
357 {
358 auto svgCanvas = MakeDOMCanvas(&dom);
359 SkRect bounds{0, 0, SkIntToScalar(100), SkIntToScalar(100)};
360 svgCanvas->drawRect(bounds, paint);
361 }
362 const SkDOM::Node* rootElement = dom.finishParsing();
363 ABORT_TEST(reporter, !rootElement, "root element not found");
364
365 const SkDOM::Node* filterElement = dom.getFirstChild(rootElement, "filter");
366 ABORT_TEST(reporter, !filterElement, "filter element not found");
367
368 const SkDOM::Node* floodElement = dom.getFirstChild(filterElement, "feFlood");
369 ABORT_TEST(reporter, !floodElement, "feFlood element not found");
370
371 const SkDOM::Node* compositeElement = dom.getFirstChild(filterElement, "feComposite");
372 ABORT_TEST(reporter, !compositeElement, "feComposite element not found");
373
374 REPORTER_ASSERT(reporter, strcmp(dom.findAttr(filterElement, "width"), "100%") == 0);
375 REPORTER_ASSERT(reporter, strcmp(dom.findAttr(filterElement, "height"), "100%") == 0);
376
377 REPORTER_ASSERT(reporter,
378 strcmp(dom.findAttr(floodElement, "flood-color"), "rgb(255,0,0)") == 0);
379 REPORTER_ASSERT(reporter, atoi(dom.findAttr(floodElement, "flood-opacity")) == 1);
380
381 REPORTER_ASSERT(reporter, strcmp(dom.findAttr(compositeElement, "in"), "flood") == 0);
382 REPORTER_ASSERT(reporter, strcmp(dom.findAttr(compositeElement, "operator"), "in") == 0);
383 }
384
DEF_TEST(SVGDevice_textpath,reporter)385 DEF_TEST(SVGDevice_textpath, reporter) {
386 SkDOM dom;
387 SkFont font(ToolUtils::create_portable_typeface());
388 SkPaint paint;
389
390 // By default, we emit <text> nodes.
391 {
392 auto svgCanvas = MakeDOMCanvas(&dom);
393 svgCanvas->drawString("foo", 100, 100, font, paint);
394 }
395 const auto* rootElement = dom.finishParsing();
396 REPORTER_ASSERT(reporter, rootElement, "root element not found");
397 const auto* textElement = dom.getFirstChild(rootElement, "text");
398 REPORTER_ASSERT(reporter, textElement, "text element not found");
399 const auto* pathElement = dom.getFirstChild(rootElement, "path");
400 REPORTER_ASSERT(reporter, !pathElement, "path element found");
401
402 // With kConvertTextToPaths_Flag, we emit <path> nodes.
403 {
404 auto svgCanvas = MakeDOMCanvas(&dom, SkSVGCanvas::kConvertTextToPaths_Flag);
405 svgCanvas->drawString("foo", 100, 100, font, paint);
406 }
407 rootElement = dom.finishParsing();
408 REPORTER_ASSERT(reporter, rootElement, "root element not found");
409 textElement = dom.getFirstChild(rootElement, "text");
410 REPORTER_ASSERT(reporter, !textElement, "text element found");
411 pathElement = dom.getFirstChild(rootElement, "path");
412 REPORTER_ASSERT(reporter, pathElement, "path element not found");
413 }
414
415 #endif
416