ppapi/tests/test_graphics_2d.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ppapi/tests/test_graphics_2d.h"
   6
   7 #include <stdlib.h>
   8 #include <string.h>
   9
  10 #include <set>
  11
  12 #include "ppapi/c/pp_errors.h"
  13 #include "ppapi/c/ppb_graphics_2d.h"
  14 #include "ppapi/cpp/completion_callback.h"
  15 #include "ppapi/cpp/graphics_2d.h"
  16 #include "ppapi/cpp/graphics_3d.h"
  17 #include "ppapi/cpp/image_data.h"
  18 #include "ppapi/cpp/instance.h"
  19 #include "ppapi/cpp/module.h"
  20 #include "ppapi/cpp/rect.h"
  21 #include "ppapi/tests/test_utils.h"
  22 #include "ppapi/tests/testing_instance.h"
  23
  24 REGISTER_TEST_CASE(Graphics2D);
  25
  26 namespace {
  27
  28 bool CanFlushContext(pp::Instance* instance, pp::Graphics2D* context) {
  29   TestCompletionCallback callback(instance->pp_instance());
  30   callback.WaitForResult(context->Flush(callback.GetCallback()));
  31   return (callback.result() == PP_OK);
  32 }
  33
  34 bool CanFlushContextC(pp::Instance* instance, PP_Resource graphics_2d,
  35                       const PPB_Graphics2D_1_1* graphics_2d_if) {
  36   TestCompletionCallback callback(instance->pp_instance());
  37   callback.WaitForResult(graphics_2d_if->Flush(
  38       graphics_2d, callback.GetCallback().pp_completion_callback()));
  39   return (callback.result() == PP_OK);
  40 }
  41
  42 }  // namespace
  43
  44 TestGraphics2D::TestGraphics2D(TestingInstance* instance)
  45   : TestCase(instance),
  46     is_view_changed_(false),
  47     post_quit_on_view_changed_(false) {
  48 }
  49
  50 bool TestGraphics2D::Init() {
  51   graphics_2d_interface_ = static_cast<const PPB_Graphics2D*>(
  52       pp::Module::Get()->GetBrowserInterface(PPB_GRAPHICS_2D_INTERFACE_1_1));
  53   image_data_interface_ = static_cast<const PPB_ImageData*>(
  54       pp::Module::Get()->GetBrowserInterface(PPB_IMAGEDATA_INTERFACE_1_0));
  55   return graphics_2d_interface_ && image_data_interface_ &&
  56          CheckTestingInterface();
  57 }
  58
  59 void TestGraphics2D::RunTests(const std::string& filter) {
  60   RUN_TEST(InvalidResource, filter);
  61   RUN_TEST(InvalidSize, filter);
  62   RUN_TEST(Humongous, filter);
  63   RUN_TEST(InitToZero, filter);
  64   RUN_TEST(Describe, filter);
  65   RUN_TEST(Scale, filter);
  66   RUN_TEST_FORCEASYNC_AND_NOT(Paint, filter);
  67   RUN_TEST_FORCEASYNC_AND_NOT(Scroll, filter);
  68   RUN_TEST_FORCEASYNC_AND_NOT(Replace, filter);
  69   RUN_TEST_FORCEASYNC_AND_NOT(Flush, filter);
  70   RUN_TEST_FORCEASYNC_AND_NOT(FlushOffscreenUpdate, filter);
  71   RUN_TEST(Dev, filter);
  72   RUN_TEST(ReplaceContentsCaching, filter);
  73   RUN_TEST(BindNull, filter);
  74 }
  75
  76 void TestGraphics2D::QuitMessageLoop() {
  77   testing_interface_->QuitMessageLoop(instance_->pp_instance());
  78 }
  79
  80 bool TestGraphics2D::ReadImageData(const pp::Graphics2D& dc,
  81                                    pp::ImageData* image,
  82                                    const pp::Point& top_left) const {
  83   return PP_ToBool(testing_interface_->ReadImageData(
  84       dc.pp_resource(),
  85       image->pp_resource(),
  86       &top_left.pp_point()));
  87 }
  88
  89 bool TestGraphics2D::IsDCUniformColor(const pp::Graphics2D& dc,
  90                                       uint32_t color) const {
  91   pp::ImageData readback(instance_, PP_IMAGEDATAFORMAT_BGRA_PREMUL,
  92                          dc.size(), false);
  93   if (readback.is_null())
  94     return false;
  95   if (!ReadImageData(dc, &readback, pp::Point(0, 0)))
  96     return false;
  97   return IsSquareInImage(readback, 0, pp::Rect(dc.size()), color);
  98 }
  99
 100 std::string TestGraphics2D::FlushAndWaitForDone(pp::Graphics2D* context) {
 101   TestCompletionCallback callback(instance_->pp_instance(), callback_type());
 102   callback.WaitForResult(context->Flush(callback.GetCallback()));
 103   CHECK_CALLBACK_BEHAVIOR(callback);
 104   ASSERT_EQ(PP_OK, callback.result());
 105   PASS();
 106 }
 107
 108 void TestGraphics2D::FillRectInImage(pp::ImageData* image,
 109                                      const pp::Rect& rect,
 110                                      uint32_t color) const {
 111   for (int y = rect.y(); y < rect.bottom(); y++) {
 112     uint32_t* row = image->GetAddr32(pp::Point(rect.x(), y));
 113     for (int pixel = 0; pixel < rect.width(); pixel++)
 114       row[pixel] = color;
 115   }
 116 }
 117
 118 void TestGraphics2D::FillImageWithGradient(pp::ImageData* image) const {
 119   for (int y = 0; y < image->size().height(); y++) {
 120     uint32_t red = ((y * 256) / image->size().height()) & 0xFF;
 121     for (int x = 0; x < image->size().width(); x++) {
 122       uint32_t green = ((x * 256) / image->size().width()) & 0xFF;
 123       uint32_t blue = ((red + green) / 2) & 0xFF;
 124       uint32_t* pixel = image->GetAddr32(pp::Point(x, y));
 125       *pixel = (blue << 24) | (green << 16) | (red << 8);
 126     }
 127   }
 128 }
 129
 130 bool TestGraphics2D::CompareImages(const pp::ImageData& image1,
 131                                    const pp::ImageData& image2) {
 132   return CompareImageRect(
 133       image1, pp::Rect(0, 0, image1.size().width(), image1.size().height()),
 134       image2, pp::Rect(0, 0, image2.size().width(), image2.size().height()));
 135 }
 136
 137 bool TestGraphics2D::CompareImageRect(const pp::ImageData& image1,
 138                                       const pp::Rect& rc1,
 139                                       const pp::ImageData& image2,
 140                                       const pp::Rect& rc2) const {
 141   if (rc1.width() != rc2.width() || rc1.height() != rc2.height())
 142     return false;
 143
 144   for (int y = 0; y < rc1.height(); y++) {
 145     for (int x = 0; x < rc1.width(); x++) {
 146       if (*(image1.GetAddr32(pp::Point(rc1.x() + x, rc1.y() + y))) !=
 147           *(image2.GetAddr32(pp::Point(rc2.x() + x, rc2.y() + y))))
 148         return false;
 149     }
 150   }
 151   return true;
 152 }
 153
 154 bool TestGraphics2D::IsSquareInImage(const pp::ImageData& image_data,
 155                                      uint32_t background_color,
 156                                      const pp::Rect& square,
 157                                      uint32_t square_color) const {
 158   for (int y = 0; y < image_data.size().height(); y++) {
 159     for (int x = 0; x < image_data.size().width(); x++) {
 160       uint32_t pixel = *image_data.GetAddr32(pp::Point(x, y));
 161       uint32_t desired_color;
 162       if (square.Contains(x, y))
 163         desired_color = square_color;
 164       else
 165         desired_color = background_color;
 166       if (pixel != desired_color)
 167         return false;
 168     }
 169   }
 170   return true;
 171 }
 172
 173 bool TestGraphics2D::IsSquareInDC(const pp::Graphics2D& dc,
 174                                   uint32_t background_color,
 175                                   const pp::Rect& square,
 176                                   uint32_t square_color) const {
 177   pp::ImageData readback(instance_, PP_IMAGEDATAFORMAT_BGRA_PREMUL,
 178                          dc.size(), false);
 179   if (readback.is_null())
 180     return false;
 181   if (!ReadImageData(dc, &readback, pp::Point(0, 0)))
 182     return false;
 183   return IsSquareInImage(readback, background_color, square, square_color);
 184 }
 185
 186
 187 PP_Resource TestGraphics2D::ReplaceContentsAndReturnID(
 188     pp::Graphics2D* dc,
 189     const pp::Size& size) {
 190   pp::ImageData image(instance_, PP_IMAGEDATAFORMAT_BGRA_PREMUL, size, true);
 191
 192   PP_Resource id = image.pp_resource();
 193
 194   dc->ReplaceContents(&image);
 195   std::string result = FlushAndWaitForDone(dc);
 196   if (!result.empty())
 197     return 0;
 198
 199   return id;
 200 }
 201
 202 // Test all the functions with an invalid handle. Most of these just check for
 203 // a crash since the browser don't return a value.
 204 std::string TestGraphics2D::TestInvalidResource() {
 205   pp::Graphics2D null_context;
 206   pp::ImageData image(instance_, PP_IMAGEDATAFORMAT_BGRA_PREMUL,
 207                       pp::Size(16, 16), true);
 208
 209   // Describe.
 210   PP_Size size;
 211   PP_Bool opaque;
 212   graphics_2d_interface_->Describe(image.pp_resource(), &size, &opaque);
 213   graphics_2d_interface_->Describe(null_context.pp_resource(),
 214                                    &size, &opaque);
 215
 216   // PaintImageData.
 217   PP_Point zero_zero;
 218   zero_zero.x = 0;
 219   zero_zero.y = 0;
 220   graphics_2d_interface_->PaintImageData(image.pp_resource(),
 221                                          image.pp_resource(),
 222                                          &zero_zero, NULL);
 223   graphics_2d_interface_->PaintImageData(null_context.pp_resource(),
 224                                          image.pp_resource(),
 225                                          &zero_zero, NULL);
 226
 227   // Scroll.
 228   PP_Point zero_ten;
 229   zero_ten.x = 0;
 230   zero_ten.y = 10;
 231   graphics_2d_interface_->Scroll(image.pp_resource(), NULL, &zero_ten);
 232   graphics_2d_interface_->Scroll(null_context.pp_resource(),
 233                                  NULL, &zero_ten);
 234
 235   // ReplaceContents.
 236   graphics_2d_interface_->ReplaceContents(image.pp_resource(),
 237                                           image.pp_resource());
 238   graphics_2d_interface_->ReplaceContents(null_context.pp_resource(),
 239                                           image.pp_resource());
 240
 241   // Flush.
 242   TestCompletionCallback cb(instance_->pp_instance(), PP_OPTIONAL);
 243   cb.WaitForResult(
 244       graphics_2d_interface_->Flush(image.pp_resource(),
 245                                     cb.GetCallback().pp_completion_callback()));
 246   ASSERT_EQ(PP_ERROR_BADRESOURCE, cb.result());
 247   cb.WaitForResult(
 248       graphics_2d_interface_->Flush(null_context.pp_resource(),
 249                                     cb.GetCallback().pp_completion_callback()));
 250   ASSERT_EQ(PP_ERROR_BADRESOURCE, cb.result());
 251
 252   // ReadImageData.
 253   ASSERT_FALSE(testing_interface_->ReadImageData(image.pp_resource(),
 254                                                  image.pp_resource(),
 255                                                  &zero_zero));
 256   ASSERT_FALSE(testing_interface_->ReadImageData(null_context.pp_resource(),
 257                                                  image.pp_resource(),
 258                                                  &zero_zero));
 259
 260   PASS();
 261 }
 262
 263 std::string TestGraphics2D::TestInvalidSize() {
 264   pp::Graphics2D a(instance_, pp::Size(16, 0), false);
 265   ASSERT_FALSE(CanFlushContext(instance_, &a));
 266
 267   pp::Graphics2D b(instance_, pp::Size(0, 16), false);
 268   ASSERT_FALSE(CanFlushContext(instance_, &b));
 269
 270   // Need to use the C API since pp::Size prevents negative sizes.
 271   PP_Size size;
 272   size.width = 16;
 273   size.height = -16;
 274   PP_Resource graphics = graphics_2d_interface_->Create(
 275       instance_->pp_instance(), &size, PP_FALSE);
 276   ASSERT_FALSE(CanFlushContextC(instance_, graphics, graphics_2d_interface_));
 277   pp::Module::Get()->core()->ReleaseResource(graphics);
 278
 279   size.width = -16;
 280   size.height = 16;
 281   graphics = graphics_2d_interface_->Create(
 282       instance_->pp_instance(), &size, PP_FALSE);
 283   ASSERT_FALSE(CanFlushContextC(instance_, graphics, graphics_2d_interface_));
 284   pp::Module::Get()->core()->ReleaseResource(graphics);
 285
 286   // Overflow to negative size
 287   size.width = std::numeric_limits<int32_t>::max();
 288   size.height = std::numeric_limits<int32_t>::max();
 289   graphics = graphics_2d_interface_->Create(
 290       instance_->pp_instance(), &size, PP_FALSE);
 291   ASSERT_FALSE(CanFlushContextC(instance_, graphics, graphics_2d_interface_));
 292   pp::Module::Get()->core()->ReleaseResource(graphics);
 293
 294   PASS();
 295 }
 296
 297 std::string TestGraphics2D::TestHumongous() {
 298   pp::Graphics2D a(instance_, pp::Size(100000, 100000), false);
 299   ASSERT_FALSE(CanFlushContext(instance_, &a));
 300   PASS();
 301 }
 302
 303 std::string TestGraphics2D::TestInitToZero() {
 304   const int w = 15, h = 17;
 305   pp::Graphics2D dc(instance_, pp::Size(w, h), false);
 306   ASSERT_FALSE(dc.is_null());
 307
 308   // Make an image with nonzero data in it (so we can test that zeros were
 309   // actually read versus ReadImageData being a NOP).
 310   pp::ImageData image(instance_, PP_IMAGEDATAFORMAT_BGRA_PREMUL,
 311                       pp::Size(w, h), true);
 312   ASSERT_FALSE(image.is_null());
 313   ASSERT_FALSE(image.size().IsEmpty());
 314   memset(image.data(), 0xFF, image.stride() * image.size().height() * 4);
 315
 316   // Read out the initial data from the device & check.
 317   ASSERT_TRUE(ReadImageData(dc, &image, pp::Point(0, 0)));
 318   ASSERT_TRUE(IsSquareInImage(image, 0, pp::Rect(0, 0, w, h), 0));
 319
 320   PASS();
 321 }
 322
 323 std::string TestGraphics2D::TestDescribe() {
 324   const int w = 15, h = 17;
 325   const bool always_opaque = (::rand() % 2 == 1);
 326   pp::Graphics2D dc(instance_, pp::Size(w, h), always_opaque);
 327   ASSERT_FALSE(dc.is_null());
 328
 329   PP_Size size;
 330   size.width = -1;
 331   size.height = -1;
 332   PP_Bool is_always_opaque = PP_FALSE;
 333   ASSERT_TRUE(graphics_2d_interface_->Describe(dc.pp_resource(), &size,
 334                                                &is_always_opaque));
 335   ASSERT_EQ(w, size.width);
 336   ASSERT_EQ(h, size.height);
 337   ASSERT_EQ(PP_FromBool(always_opaque), is_always_opaque);
 338
 339   PASS();
 340 }
 341
 342 std::string TestGraphics2D::TestScale() {
 343   // Tests GetScale/SetScale
 344   const int w = 20, h = 16;
 345   const float scale = 1.0f/2.0f;
 346   pp::Graphics2D dc(instance_, pp::Size(w, h), false);
 347   ASSERT_FALSE(dc.is_null());
 348   ASSERT_EQ(1.0,  dc.GetScale());
 349   ASSERT_TRUE(dc.SetScale(scale));
 350   ASSERT_EQ(scale, dc.GetScale());
 351   // Try setting a few invalid scale factors. Ensure that we catch these errors
 352   // and don't change the actual scale
 353   ASSERT_FALSE(dc.SetScale(-1.0f));
 354   ASSERT_FALSE(dc.SetScale(0.0f));
 355   ASSERT_EQ(scale, dc.GetScale());
 356
 357   // Verify that the context has the specified number of pixels, despite the
 358   // non-identity scale
 359   PP_Size size;
 360   size.width = -1;
 361   size.height = -1;
 362   PP_Bool is_always_opaque = PP_FALSE;
 363   ASSERT_TRUE(graphics_2d_interface_->Describe(dc.pp_resource(), &size,
 364                                                &is_always_opaque));
 365   ASSERT_EQ(w, size.width);
 366   ASSERT_EQ(h, size.height);
 367   ASSERT_EQ(PP_FALSE, is_always_opaque);
 368
 369   PASS();
 370 }
 371
 372 std::string TestGraphics2D::TestPaint() {
 373   const int w = 15, h = 17;
 374   pp::Graphics2D dc(instance_, pp::Size(w, h), false);
 375   ASSERT_FALSE(dc.is_null());
 376
 377   // Make sure the device background is 0.
 378   ASSERT_TRUE(IsDCUniformColor(dc, 0));
 379
 380   // Fill the backing store with white.
 381   const uint32_t background_color = 0xFFFFFFFF;
 382   pp::ImageData background(instance_, PP_IMAGEDATAFORMAT_BGRA_PREMUL,
 383                            pp::Size(w, h), false);
 384   FillRectInImage(&background, pp::Rect(0, 0, w, h), background_color);
 385   dc.PaintImageData(background, pp::Point(0, 0));
 386   ASSERT_SUBTEST_SUCCESS(FlushAndWaitForDone(&dc));
 387
 388   // Make an image to paint with that's opaque white and enqueue a paint.
 389   const int fill_w = 2, fill_h = 3;
 390   pp::ImageData fill(instance_, PP_IMAGEDATAFORMAT_BGRA_PREMUL,
 391                      pp::Size(fill_w, fill_h), true);
 392   ASSERT_FALSE(fill.is_null());
 393   FillRectInImage(&fill, pp::Rect(fill.size()), background_color);
 394   const int paint_x = 4, paint_y = 5;
 395   dc.PaintImageData(fill, pp::Point(paint_x, paint_y));
 396
 397   // Validate that nothing has been actually painted.
 398   ASSERT_TRUE(IsDCUniformColor(dc, background_color));
 399
 400   // The paint hasn't been flushed so we can still change the bitmap. Fill with
 401   // 50% blue. This will also verify that the backing store is replaced
 402   // with the contents rather than blended.
 403   const uint32_t fill_color = 0x80000080;
 404   FillRectInImage(&fill, pp::Rect(fill.size()), fill_color);
 405   ASSERT_SUBTEST_SUCCESS(FlushAndWaitForDone(&dc));
 406
 407   ASSERT_TRUE(IsSquareInDC(dc, background_color,
 408                            pp::Rect(paint_x, paint_y, fill_w, fill_h),
 409                            fill_color));
 410
 411   // Reset the DC to blank white & paint our image slightly off the buffer.
 412   // This should succeed. We also try painting the same thing where the
 413   // dirty rect falls outeside of the device, which should fail.
 414   dc.PaintImageData(background, pp::Point(0, 0));
 415   const int second_paint_x = -1, second_paint_y = -2;
 416   dc.PaintImageData(fill, pp::Point(second_paint_x, second_paint_y));
 417   dc.PaintImageData(fill, pp::Point(second_paint_x, second_paint_y),
 418                     pp::Rect(-second_paint_x, -second_paint_y, 1, 1));
 419   ASSERT_SUBTEST_SUCCESS(FlushAndWaitForDone(&dc));
 420
 421   // Now we should have a little bit of the image peeking out the top left.
 422   ASSERT_TRUE(IsSquareInDC(dc, background_color, pp::Rect(0, 0, 1, 1),
 423                            fill_color));
 424
 425   // Now repaint that top left pixel by doing a subset of the source image.
 426   pp::ImageData subset(instance_, PP_IMAGEDATAFORMAT_BGRA_PREMUL,
 427                        pp::Size(w, h), false);
 428   uint32_t subset_color = 0x80808080;
 429   const int subset_x = 2, subset_y = 1;
 430   *subset.GetAddr32(pp::Point(subset_x, subset_y)) = subset_color;
 431   dc.PaintImageData(subset, pp::Point(-subset_x, -subset_y),
 432                     pp::Rect(subset_x, subset_y, 1, 1));
 433   ASSERT_SUBTEST_SUCCESS(FlushAndWaitForDone(&dc));
 434   ASSERT_TRUE(IsSquareInDC(dc, background_color, pp::Rect(0, 0, 1, 1),
 435                            subset_color));
 436
 437   PASS();
 438 }
 439
 440 std::string TestGraphics2D::TestScroll() {
 441   const int w = 115, h = 117;
 442   pp::Graphics2D dc(instance_, pp::Size(w, h), false);
 443   ASSERT_FALSE(dc.is_null());
 444   ASSERT_TRUE(instance_->BindGraphics(dc));
 445
 446   // Make sure the device background is 0.
 447   ASSERT_TRUE(IsDCUniformColor(dc, 0));
 448
 449   const int image_width = 15, image_height = 23;
 450   pp::ImageData test_image(instance_, PP_IMAGEDATAFORMAT_BGRA_PREMUL,
 451                            pp::Size(image_width, image_height), false);
 452   FillImageWithGradient(&test_image);
 453   pp::ImageData no_image(instance_, PP_IMAGEDATAFORMAT_BGRA_PREMUL,
 454                          pp::Size(image_width, image_height), false);
 455   FillRectInImage(&no_image, pp::Rect(0, 0, image_width, image_height), 0);
 456   pp::ImageData readback_image(instance_, PP_IMAGEDATAFORMAT_BGRA_PREMUL,
 457                                pp::Size(image_width, image_height), false);
 458   pp::ImageData readback_scroll(instance_, PP_IMAGEDATAFORMAT_BGRA_PREMUL,
 459                                 pp::Size(image_width, image_height), false);
 460
 461   ASSERT_EQ(pp::Size(image_width, image_height), test_image.size());
 462
 463   int image_x = 51, image_y = 72;
 464   dc.PaintImageData(test_image, pp::Point(image_x, image_y));
 465   ASSERT_SUBTEST_SUCCESS(FlushAndWaitForDone(&dc));
 466
 467   // Test Case 1. Incorrect usage when scrolling image to a free space.
 468   // The clip area is *not* the area to shift around within the graphics device
 469   // by specified amount. It's the area to which the scroll is limited. So if
 470   // the clip area is the size of the image and the amount points to free space,
 471   // the scroll won't result in additional images.
 472   int dx = -40, dy = -48;
 473   int scroll_x = image_x + dx, scroll_y = image_y + dy;
 474   pp::Rect clip(image_x, image_y, image_width, image_height);
 475   dc.Scroll(clip, pp::Point(dx, dy));
 476   ASSERT_SUBTEST_SUCCESS(FlushAndWaitForDone(&dc));
 477   ASSERT_TRUE(
 478       ReadImageData(dc, &readback_scroll, pp::Point(scroll_x, scroll_y)));
 479   ASSERT_TRUE(CompareImages(no_image, readback_scroll));
 480
 481   // Test Case 2.
 482   // The amount is intended to place the image in the free space outside
 483   // of the original, but the clip area extends beyond the graphics device area.
 484   // This scroll is invalid and will be a noop.
 485   scroll_x = 11, scroll_y = 24;
 486   clip = pp::Rect(0, 0, w, h + 1);
 487   dc.Scroll(clip, pp::Point(scroll_x - image_x, scroll_y - image_y));
 488   ASSERT_SUBTEST_SUCCESS(FlushAndWaitForDone(&dc));
 489   ASSERT_TRUE(
 490       ReadImageData(dc, &readback_scroll, pp::Point(scroll_x, scroll_y)));
 491   ASSERT_TRUE(CompareImages(no_image, readback_scroll));
 492
 493   // Test Case 3.
 494   // The amount is intended to place the image in the free space outside
 495   // of the original, but the clip area does not cover the image,
 496   // so there is nothing to scroll.
 497   scroll_x = 11, scroll_y = 24;
 498   clip = pp::Rect(0, 0, image_x, image_y);
 499   dc.Scroll(clip, pp::Point(scroll_x - image_x, scroll_y - image_y));
 500   ASSERT_SUBTEST_SUCCESS(FlushAndWaitForDone(&dc));
 501   ASSERT_TRUE(
 502       ReadImageData(dc, &readback_scroll, pp::Point(scroll_x, scroll_y)));
 503   ASSERT_TRUE(CompareImages(no_image, readback_scroll));
 504
 505   // Test Case 4.
 506   // Same as TC3, but the clip covers part of the image.
 507   // This part will be scrolled to the intended origin.
 508   int part_w = image_width / 2, part_h = image_height / 2;
 509   clip = pp::Rect(0, 0, image_x + part_w, image_y + part_h);
 510   dc.Scroll(clip, pp::Point(scroll_x - image_x, scroll_y - image_y));
 511   ASSERT_SUBTEST_SUCCESS(FlushAndWaitForDone(&dc));
 512   ASSERT_TRUE(
 513       ReadImageData(dc, &readback_scroll, pp::Point(scroll_x, scroll_y)));
 514   ASSERT_FALSE(CompareImages(test_image, readback_scroll));
 515   pp::Rect part_rect(part_w, part_h);
 516   ASSERT_TRUE(
 517       CompareImageRect(test_image, part_rect, readback_scroll, part_rect));
 518
 519   // Test Case 5
 520   // Same as TC3, but the clip area covers the entire image.
 521   // It will be scrolled to the intended origin.
 522   clip = pp::Rect(0, 0, image_x + image_width, image_y + image_height);
 523   dc.Scroll(clip, pp::Point(scroll_x - image_x, scroll_y - image_y));
 524   ASSERT_SUBTEST_SUCCESS(FlushAndWaitForDone(&dc));
 525   ASSERT_TRUE(
 526       ReadImageData(dc, &readback_scroll, pp::Point(scroll_x, scroll_y)));
 527   ASSERT_TRUE(CompareImages(test_image, readback_scroll));
 528
 529   // Note that the undefined area left by the scroll does not actually get
 530   // cleared, so the original image is still there. This is not guaranteed and
 531   // is not something for users to rely on, but we can test for this here, so
 532   // we know when the underlying behavior changes.
 533   ASSERT_TRUE(ReadImageData(dc, &readback_image, pp::Point(image_x, image_y)));
 534   ASSERT_TRUE(CompareImages(test_image, readback_image));
 535
 536   // Test Case 6.
 537   // Scroll image to an overlapping space. The clip area is limited
 538   // to the image, so this will just modify its area.
 539   dx = 6;
 540   dy = 9;
 541   scroll_x = image_x + dx;
 542   scroll_y = image_y + dy;
 543   clip = pp::Rect(image_x, image_y, image_width, image_height);
 544   dc.Scroll(clip, pp::Point(dx, dy));
 545   ASSERT_SUBTEST_SUCCESS(FlushAndWaitForDone(&dc));
 546   ASSERT_TRUE(ReadImageData(dc, &readback_image, pp::Point(image_x, image_y)));
 547   ASSERT_FALSE(CompareImages(test_image, readback_image));
 548   pp::Rect scroll_rect(image_width - dx, image_height - dy);
 549   ASSERT_TRUE(
 550       ReadImageData(dc, &readback_scroll, pp::Point(scroll_x, scroll_y)));
 551   ASSERT_TRUE(
 552       CompareImageRect(test_image, scroll_rect, readback_scroll, scroll_rect));
 553
 554   PASS();
 555 }
 556
 557 std::string TestGraphics2D::TestReplace() {
 558   const int w = 15, h = 17;
 559   pp::Graphics2D dc(instance_, pp::Size(w, h), false);
 560   ASSERT_FALSE(dc.is_null());
 561
 562   // Replacing with a different size image should fail.
 563   pp::ImageData weird_size(instance_, PP_IMAGEDATAFORMAT_BGRA_PREMUL,
 564                            pp::Size(w - 1, h), true);
 565   ASSERT_FALSE(weird_size.is_null());
 566   dc.ReplaceContents(&weird_size);
 567
 568   // Fill the background with blue but don't flush yet.
 569   const uint32_t background_color = 0xFF0000FF;
 570   pp::ImageData background(instance_, PP_IMAGEDATAFORMAT_BGRA_PREMUL,
 571                            pp::Size(w, h), true);
 572   ASSERT_FALSE(background.is_null());
 573   FillRectInImage(&background, pp::Rect(0, 0, w, h), background_color);
 574   dc.PaintImageData(background, pp::Point(0, 0));
 575
 576   // Replace with a green background but don't flush yet.
 577   const int32_t swapped_color = 0x00FF00FF;
 578   pp::ImageData swapped(instance_, PP_IMAGEDATAFORMAT_BGRA_PREMUL,
 579                         pp::Size(w, h), true);
 580   ASSERT_FALSE(swapped.is_null());
 581   FillRectInImage(&swapped, pp::Rect(0, 0, w, h), swapped_color);
 582   dc.ReplaceContents(&swapped);
 583
 584   // The background should be unchanged since we didn't flush yet.
 585   ASSERT_TRUE(IsDCUniformColor(dc, 0));
 586
 587   // Test the C++ wrapper. The size of the swapped image should be reset.
 588   ASSERT_TRUE(!swapped.pp_resource() && !swapped.size().width() &&
 589               !swapped.size().height() && !swapped.data());
 590
 591   // Painting with the swapped image should fail.
 592   dc.PaintImageData(swapped, pp::Point(0, 0));
 593
 594   // Flush and make sure the result is correct.
 595   ASSERT_SUBTEST_SUCCESS(FlushAndWaitForDone(&dc));
 596
 597   // The background should be green from the swapped image.
 598   ASSERT_TRUE(IsDCUniformColor(dc, swapped_color));
 599
 600   PASS();
 601 }
 602
 603 std::string TestGraphics2D::TestFlush() {
 604   // Tests that synchronous flushes (NULL callback) fail on the main thread
 605   // (which is the current one).
 606   const int w = 15, h = 17;
 607   pp::Graphics2D dc(instance_, pp::Size(w, h), false);
 608   ASSERT_FALSE(dc.is_null());
 609
 610   // Fill the background with blue but don't flush yet.
 611   pp::ImageData background(instance_, PP_IMAGEDATAFORMAT_BGRA_PREMUL,
 612                            pp::Size(w, h), true);
 613   ASSERT_FALSE(background.is_null());
 614   dc.PaintImageData(background, pp::Point(0, 0));
 615
 616   int32_t rv = dc.Flush(pp::BlockUntilComplete());
 617   ASSERT_EQ(PP_ERROR_BLOCKS_MAIN_THREAD, rv);
 618
 619   // Test flushing with no operations still issues a callback.
 620   // (This may also hang if the browser never issues the callback).
 621   pp::Graphics2D dc_nopaints(instance_, pp::Size(w, h), false);
 622   ASSERT_FALSE(dc.is_null());
 623   ASSERT_SUBTEST_SUCCESS(FlushAndWaitForDone(&dc_nopaints));
 624
 625   TestCompletionCallback callback_1(instance_->pp_instance(), callback_type());
 626
 627   // Test that multiple flushes fail if we don't get a callback in between.
 628   rv = dc_nopaints.Flush(callback_1.GetCallback());
 629   if (rv == PP_OK_COMPLETIONPENDING) {
 630     // If the first flush completes asynchronously, then a second should fail.
 631     TestCompletionCallback callback_2(instance_->pp_instance(),
 632                                       callback_type());
 633     callback_2.WaitForResult(dc_nopaints.Flush(callback_2.GetCallback()));
 634     CHECK_CALLBACK_BEHAVIOR(callback_2);
 635     ASSERT_EQ(PP_ERROR_INPROGRESS, callback_2.result());
 636   }
 637   callback_1.WaitForResult(rv);
 638   ASSERT_EQ(PP_OK, callback_1.result());
 639
 640   PASS();
 641 }
 642
 643 void TestGraphics2D::DidChangeView(const pp::View& view) {
 644   if (post_quit_on_view_changed_) {
 645     post_quit_on_view_changed_ = false;
 646     is_view_changed_ = true;
 647     testing_interface_->QuitMessageLoop(instance_->pp_instance());
 648   }
 649 }
 650
 651 void TestGraphics2D::ResetViewChangedState() {
 652   is_view_changed_ = false;
 653 }
 654
 655 bool TestGraphics2D::WaitUntilViewChanged() {
 656   // Run a nested message loop. It will exit either on ViewChanged or if the
 657   // timeout happens.
 658
 659   // If view changed before we have chance to run message loop, return directly.
 660   if (is_view_changed_)
 661     return true;
 662
 663   post_quit_on_view_changed_ = true;
 664   testing_interface_->RunMessageLoop(instance_->pp_instance());
 665   post_quit_on_view_changed_ = false;
 666
 667   return is_view_changed_;
 668 }
 669
 670 std::string TestGraphics2D::TestFlushOffscreenUpdate() {
 671   // Tests that callback of offscreen updates should be delayed.
 672   const PP_Time kFlushDelaySec = 1. / 30;  // 30 fps
 673   const int w = 80, h = 80;
 674   pp::Graphics2D dc(instance_, pp::Size(w, h), true);
 675   ASSERT_FALSE(dc.is_null());
 676   ASSERT_TRUE(instance_->BindGraphics(dc));
 677
 678   // Squeeze from top until bottom half of plugin is out of screen.
 679   ResetViewChangedState();
 680   instance_->EvalScript(
 681       "var big = document.createElement('div');"
 682       "var offset = "
 683       "    window.innerHeight - plugin.offsetTop - plugin.offsetHeight / 2;"
 684       "big.setAttribute('id', 'big-div');"
 685       "big.setAttribute('style', 'height: ' + offset + '; width: 100%;');"
 686       "document.body.insertBefore(big, document.body.firstChild);");
 687   ASSERT_TRUE(WaitUntilViewChanged());
 688
 689   // Allocate a red image chunk
 690   pp::ImageData chunk(instance_, PP_IMAGEDATAFORMAT_RGBA_PREMUL,
 691                       pp::Size(w/8, h/8), true);
 692   ASSERT_FALSE(chunk.is_null());
 693   const uint32_t kRed = 0xff0000ff;
 694   FillRectInImage(&chunk, pp::Rect(chunk.size()), kRed);
 695
 696   // Paint a invisable chunk, expecting Flush to invoke callback slowly.
 697   dc.PaintImageData(chunk, pp::Point(0, h*0.75));
 698
 699   PP_Time begin = pp::Module::Get()->core()->GetTime();
 700   ASSERT_SUBTEST_SUCCESS(FlushAndWaitForDone(&dc));
 701   PP_Time actual_time_elapsed = pp::Module::Get()->core()->GetTime() - begin;
 702   // Expect actual_time_elapsed >= kFlushDelaySec, but loose a bit to avoid
 703   // precision issue.
 704   ASSERT_GE(actual_time_elapsed, kFlushDelaySec * 0.9);
 705
 706   // Remove the padding on the top since test cases here isn't independent.
 707   instance_->EvalScript(
 708       "var big = document.getElementById('big-div');"
 709       "big.parentNode.removeChild(big);");
 710   ResetViewChangedState();
 711   ASSERT_TRUE(WaitUntilViewChanged());
 712
 713   PASS();
 714 }
 715
 716 std::string TestGraphics2D::TestDev() {
 717   // Tests GetScale/SetScale via the Graphics2D_Dev C++ wrapper
 718   const int w = 20, h = 16;
 719   const float scale = 1.0f/2.0f;
 720   pp::Graphics2D dc(instance_, pp::Size(w, h), false);
 721   ASSERT_FALSE(dc.is_null());
 722   ASSERT_EQ(1.0f, dc.GetScale());
 723   ASSERT_TRUE(dc.SetScale(scale));
 724   ASSERT_EQ(scale, dc.GetScale());
 725   // Try setting a few invalid scale factors. Ensure that we catch these errors
 726   // and don't change the actual scale
 727   ASSERT_FALSE(dc.SetScale(-1.0f));
 728   ASSERT_FALSE(dc.SetScale(0.0f));
 729   ASSERT_EQ(scale, dc.GetScale());
 730
 731   // Verify that the context has the specified number of pixels, despite the
 732   // non-identity scale
 733   PP_Size size;
 734   size.width = -1;
 735   size.height = -1;
 736   PP_Bool is_always_opaque = PP_FALSE;
 737   ASSERT_TRUE(graphics_2d_interface_->Describe(dc.pp_resource(), &size,
 738                                                &is_always_opaque));
 739   ASSERT_EQ(w, size.width);
 740   ASSERT_EQ(h, size.height);
 741   ASSERT_EQ(PP_FALSE, is_always_opaque);
 742
 743   PASS();
 744 }
 745
 746 // This test makes sure that the out-of-process image data caching works as
 747 // expected. Doing ReplaceContents quickly should re-use the image data from
 748 // older ones.
 749 std::string TestGraphics2D::TestReplaceContentsCaching() {
 750   // The cache is only active when running in the proxy, so skip it otherwise.
 751   if (!testing_interface_->IsOutOfProcess())
 752     PASS();
 753
 754   // Here we test resource IDs as a way to determine if the resource is being
 755   // cached and re-used. This is non-optimal since it's entirely possible
 756   // (and maybe better) for the proxy to return new resource IDs for the
 757   // re-used objects. Howevever, our current implementation does this so it is
 758   // an easy thing to check for.
 759   //
 760   // You could check for the shared memory pointers getting re-used, but the
 761   // OS is very likely to use the same memory location for a newly-mapped image
 762   // if one was deleted, meaning that it could pass even if the cache is broken.
 763   // This would then require that we add some address-re-use-preventing code
 764   // which would be tricky.
 765   std::set<PP_Resource> resources;
 766
 767   pp::Size size(16, 16);
 768   pp::Graphics2D dc(instance_, size, false);
 769
 770   // Do two replace contentses, adding the old resource IDs to our map.
 771   PP_Resource imageres = ReplaceContentsAndReturnID(&dc, size);
 772   ASSERT_TRUE(imageres);
 773   resources.insert(imageres);
 774   imageres = ReplaceContentsAndReturnID(&dc, size);
 775   ASSERT_TRUE(imageres);
 776   resources.insert(imageres);
 777
 778   // Now doing more replace contents should re-use older IDs if the cache is
 779   // working.
 780   imageres = ReplaceContentsAndReturnID(&dc, size);
 781   ASSERT_TRUE(resources.find(imageres) != resources.end());
 782   imageres = ReplaceContentsAndReturnID(&dc, size);
 783   ASSERT_TRUE(resources.find(imageres) != resources.end());
 784
 785   PASS();
 786 }
 787
 788 std::string TestGraphics2D::TestBindNull() {
 789   // Binding a null resource is not an error, it should clear all bound
 790   // resources. We can't easily test what resource is bound, but we can test
 791   // that this doesn't throw an error.
 792   ASSERT_TRUE(instance_->BindGraphics(pp::Graphics2D()));
 793   ASSERT_TRUE(instance_->BindGraphics(pp::Graphics3D()));
 794
 795   const int w = 115, h = 117;
 796   pp::Graphics2D dc(instance_, pp::Size(w, h), false);
 797   ASSERT_FALSE(dc.is_null());
 798   ASSERT_TRUE(instance_->BindGraphics(dc));
 799
 800   ASSERT_TRUE(instance_->BindGraphics(pp::Graphics2D()));
 801   ASSERT_TRUE(instance_->BindGraphics(pp::Graphics3D()));
 802
 803   PASS();
 804 }
 805