Cloning a bunch of stuff from the native_client repository at r6528

ppapi/native_client/tests/ppapi_browser/ppb_graphics2d/ppapi_ppb_graphics2d.cc

Index: ppapi/native_client/tests/ppapi_browser/ppb_graphics2d/ppapi_ppb_graphics2d.cc
===================================================================
--- ppapi/native_client/tests/ppapi_browser/ppb_graphics2d/ppapi_ppb_graphics2d.cc	(revision 0)
+++ ppapi/native_client/tests/ppapi_browser/ppb_graphics2d/ppapi_ppb_graphics2d.cc	(revision 0)
@@ -0,0 +1,553 @@
+// Copyright (c) 2011 The Native Client Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// Test cases for PPB_Graphics2D functions.
+// As most of them return void, the test automatically confirms that
+// there is no crash while requiring a visual inspection of the painted output.
+
+#include <string.h>
+
+#include "native_client/src/include/nacl_macros.h"
+#include "native_client/src/shared/platform/nacl_check.h"
+#include "native_client/tests/ppapi_test_lib/get_browser_interface.h"
+#include "native_client/tests/ppapi_test_lib/test_interface.h"
+#include "ppapi/c/dev/ppb_testing_dev.h"
+#include "ppapi/c/pp_bool.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/c/pp_point.h"
+#include "ppapi/c/pp_rect.h"
+#include "ppapi/c/pp_size.h"
+#include "ppapi/c/ppb_core.h"
+#include "ppapi/c/ppb_graphics_2d.h"
+#include "ppapi/c/ppb_image_data.h"
+#include "ppapi/c/ppb_instance.h"
+#include "ppapi/c/ppb_url_loader.h"
+
+namespace {
+
+const PP_Bool kAlwaysOpaque = PP_TRUE;
+const PP_Bool kNotAlwaysOpaque = PP_FALSE;
+const PP_Size kNegativeWidth = PP_MakeSize(-1, 1);
+const PP_Size kNegativeHeight = PP_MakeSize(1, -1);
+const PP_Size kZeroPixels = PP_MakeSize(0, 0);
+const PP_Size kOnePixel = PP_MakeSize(1, 1);
+const PP_Size k90x90 = PP_MakeSize(90, 90);
+const PP_Size k60x60 = PP_MakeSize(60, 60);
+const PP_Size k30x30 = PP_MakeSize(30, 30);
+const PP_Size k2500x2500 = PP_MakeSize(2500, 2500);
+const PP_Size k100000x100000 = PP_MakeSize(100000, 100000);
+const PP_Point kOrigin = PP_MakePoint(0, 0);
+const PP_Rect kBadRect = { PP_MakePoint(-1, -1), PP_MakeSize(-1, -1) };
+const PP_Rect* kEntireImage = NULL;
+const PP_Bool kInitToZero = PP_TRUE;
+
+// TODO(polina, nfullagar): allow specification of non-premultipled colors
+// and provide alpha premultiplcation in FormatColor(). This will be required
+// when future PPAPI pixel formats are extended to include non-premultipled
+// or ignored alpha.
+
+struct ColorPremul { uint32_t A, R, G, B; };  // Use premultipled Alpha.
+const ColorPremul kSheerRed = { 0x88, 0x88, 0x00, 0x00 };
+const ColorPremul kSheerBlue = { 0x88, 0x00, 0x00, 0x88 };
+const ColorPremul kSheerGray = { 0x77, 0x55, 0x55, 0x55 };
+const ColorPremul kOpaqueGreen = { 0xFF, 0x00, 0xFF, 0x00 };
+const ColorPremul kOpaqueBlack = { 0xFF, 0x00, 0x00, 0x00 };
+const ColorPremul kOpaqueWhite = { 0xFF, 0xFF, 0xFF, 0xFF };
+const ColorPremul kOpaqueYellow = { 0xFF, 0xFF, 0xFF, 0x00 };
+const int kBytesPerPixel = sizeof(uint32_t);  // 4 bytes for BGRA or RGBA.
+
+// Assumes premultipled Alpha.
+uint32_t FormatColor(PP_ImageDataFormat format, ColorPremul color) {
+  if (format == PP_IMAGEDATAFORMAT_BGRA_PREMUL)
+    return (color.A << 24) | (color.R << 16) | (color.G << 8) | (color.B);
+  else if (format == PP_IMAGEDATAFORMAT_RGBA_PREMUL)
+    return (color.A << 24) | (color.B << 16) | (color.G << 8) | (color.R);
+  else
+    NACL_NOTREACHED();
+}
+
+// Make graphics2d contexts for each test the same size, so we can layer
+// the images without invalidating the previous ones.
+PP_Resource CreateGraphics2D_90x90() {
+  PP_Resource graphics2d = PPBGraphics2D()->Create(
+      pp_instance(), &k90x90, kNotAlwaysOpaque);
+  CHECK(graphics2d != kInvalidResource);
+  PPBInstance()->BindGraphics(pp_instance(), graphics2d);
+  return graphics2d;
+}
+
+PP_Resource CreateImageData(PP_Size size, ColorPremul pixel_color, void** bmp) {
+  PP_ImageDataFormat image_format = PPBImageData()->GetNativeImageDataFormat();
+  uint32_t formatted_pixel_color = FormatColor(image_format, pixel_color);
+  PP_Resource image_data = PPBImageData()->Create(
+      pp_instance(), image_format, &size, kInitToZero);
+  CHECK(image_data != kInvalidResource);
+  PP_ImageDataDesc image_desc;
+  CHECK(PPBImageData()->Describe(image_data, &image_desc) == PP_TRUE);
+  *bmp = NULL;
+  *bmp = PPBImageData()->Map(image_data);
+  CHECK(*bmp != NULL);
+  uint32_t* bmp_words = static_cast<uint32_t*>(*bmp);
+  int num_pixels = image_desc.stride / kBytesPerPixel * image_desc.size.height;
+  for (int i = 0; i < num_pixels; i++)
+    bmp_words[i] = formatted_pixel_color;
+  return image_data;
+}
+
+PP_Resource CreateImageData(PP_Size size, ColorPremul pixel_color) {
+  void* bitmap = NULL;
+  return CreateImageData(size, pixel_color, &bitmap);
+}
+
+struct FlushData {
+  FlushData(PP_Resource g, PP_Resource i) : graphics2d(g), image_data(i) {}
+  PP_Resource graphics2d;
+  PP_Resource image_data;
+};
+
+void FlushCallback(void* user_data, int32_t result);
+int g_expected_flush_calls = 0;
+PP_CompletionCallback MakeTestableFlushCallback(const char* name,
+                                                PP_Resource graphics2d,
+                                                PP_Resource image_data,
+                                                int num_calls) {
+  g_expected_flush_calls = num_calls;
+  void* user_data = new FlushData(graphics2d, image_data);
+  return MakeTestableCompletionCallback(name, FlushCallback, user_data);
+}
+
+void FlushCallback(void* user_data, int32_t result) {
+  --g_expected_flush_calls;
+  CHECK(g_expected_flush_calls >= 0);
+  CHECK(user_data != NULL);
+  CHECK(result == PP_OK);
+
+  FlushData* data = static_cast<FlushData*>(user_data);
+  PP_Resource graphics2d = data->graphics2d;
+  PP_Resource image_data = data->image_data;
+  if (g_expected_flush_calls == 0) {
+    PPBCore()->ReleaseResource(graphics2d);
+    PPBCore()->ReleaseResource(image_data);
+    delete data;
+  } else {
+    PPBGraphics2D()->PaintImageData(graphics2d, image_data, &kOrigin, NULL);
+    PP_CompletionCallback cc = MakeTestableFlushCallback(
+        "FlushAnimationCallback",
+        graphics2d, image_data, g_expected_flush_calls);
+    CHECK(PP_OK_COMPLETIONPENDING == PPBGraphics2D()->Flush(graphics2d, cc));
+  }
+}
+
+bool IsEqualSize(PP_Size size1, PP_Size size2) {
+  return (size1.width == size2.width && size1.height == size2.height);
+}
+
+bool IsSquareOnScreen(PP_Resource graphics2d, PP_Point origin, PP_Size square,
+                      ColorPremul color) {
+  PP_Size size;
+  PP_Bool dummy;
+  CHECK(PP_TRUE == PPBGraphics2D()->Describe(graphics2d, &size, &dummy));
+
+  void* bitmap = NULL;
+  PP_Resource image = CreateImageData(size, kOpaqueBlack, &bitmap);
+
+  PP_ImageDataDesc image_desc;
+  CHECK(PP_TRUE == PPBImageData()->Describe(image, &image_desc));
+  int32_t stride = image_desc.stride / kBytesPerPixel;  // width + padding.
+  uint32_t expected_color = FormatColor(image_desc.format, color);
+  CHECK(origin.x >= 0 && origin.y >= 0 &&
+        (origin.x + square.width) <= stride &&
+        (origin.y + square.height) <= image_desc.size.height);
+
+  CHECK(PP_TRUE == PPBTestingDev()->ReadImageData(graphics2d, image, &kOrigin));
+  bool found_error = false;
+  for (int y = origin.y; y < origin.y + square.height && !found_error; y++) {
+    for (int x = origin.x; x < origin.x + square.width && !found_error; x++) {
+      uint32_t pixel_color = static_cast<uint32_t*>(bitmap)[stride * y + x];
+      found_error = (pixel_color != expected_color);
+    }
+  }
+
+  PPBCore()->ReleaseResource(image);
+  return !found_error;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Test Cases
+////////////////////////////////////////////////////////////////////////////////
+
+// Tests PPB_Graphics2D::Create().
+void TestCreate() {
+  PP_Resource graphics2d = kInvalidResource;
+  const PPB_Graphics2D* ppb = PPBGraphics2D();
+
+  // Invalid instance and size -> invalid resource.
+  graphics2d = ppb->Create(kInvalidInstance, &k30x30, kAlwaysOpaque);
+  EXPECT(graphics2d == kInvalidResource);
+  graphics2d = ppb->Create(kInvalidInstance, &k30x30, kNotAlwaysOpaque);
+  EXPECT(graphics2d == kInvalidResource);
+  graphics2d = ppb->Create(kNotAnInstance, &k30x30, kAlwaysOpaque);
+  EXPECT(graphics2d == kInvalidResource);
+  graphics2d = ppb->Create(kNotAnInstance, &k30x30, kNotAlwaysOpaque);
+  EXPECT(graphics2d == kInvalidResource);
+  graphics2d = ppb->Create(pp_instance(), &k100000x100000, kAlwaysOpaque);
+  EXPECT(graphics2d == kInvalidResource);
+  graphics2d = ppb->Create(pp_instance(), &k100000x100000, kNotAlwaysOpaque);
+  EXPECT(graphics2d == kInvalidResource);
+  graphics2d = ppb->Create(pp_instance(), &kZeroPixels, kAlwaysOpaque);
+  EXPECT(graphics2d == kInvalidResource);
+  graphics2d = ppb->Create(pp_instance(), &kZeroPixels, kNotAlwaysOpaque);
+  EXPECT(graphics2d == kInvalidResource);
+  graphics2d = ppb->Create(pp_instance(), &kNegativeWidth, kAlwaysOpaque);
+  EXPECT(graphics2d == kInvalidResource);
+  graphics2d = ppb->Create(pp_instance(), &kNegativeHeight, kNotAlwaysOpaque);
+  EXPECT(graphics2d == kInvalidResource);
+  // NULL size -> Internal error in rpc method.
+  graphics2d = ppb->Create(pp_instance(), NULL, kAlwaysOpaque);
+  EXPECT(graphics2d == kInvalidResource);
+  graphics2d = ppb->Create(pp_instance(), NULL, kNotAlwaysOpaque);
+  EXPECT(graphics2d == kInvalidResource);
+
+  // Valid instance and size -> valid resource.
+  graphics2d = ppb->Create(pp_instance(), &kOnePixel, kAlwaysOpaque);
+  EXPECT(graphics2d != kInvalidResource);
+  PPBCore()->ReleaseResource(graphics2d);
+  graphics2d = ppb->Create(pp_instance(), &kOnePixel, kNotAlwaysOpaque);
+  EXPECT(graphics2d != kInvalidResource);
+  PPBCore()->ReleaseResource(graphics2d);
+  graphics2d = ppb->Create(pp_instance(), &k30x30, kAlwaysOpaque);
+  EXPECT(graphics2d != kInvalidResource);
+  PPBCore()->ReleaseResource(graphics2d);
+  graphics2d = ppb->Create(pp_instance(), &k30x30, kNotAlwaysOpaque);
+  EXPECT(graphics2d != kInvalidResource);
+  PPBCore()->ReleaseResource(graphics2d);
+  graphics2d = ppb->Create(pp_instance(), &k2500x2500, kAlwaysOpaque);
+  EXPECT(graphics2d != kInvalidResource);
+  PPBCore()->ReleaseResource(graphics2d);
+  graphics2d = ppb->Create(pp_instance(), &k2500x2500, kNotAlwaysOpaque);
+  EXPECT(graphics2d != kInvalidResource);
+  PPBCore()->ReleaseResource(graphics2d);
+
+  TEST_PASSED;
+}
+
+// Tests PPB_Graphics2D::IsGraphics2D().
+void TestIsGraphics2D() {
+  // Invalid / non-existent / non-Graphics2D resource -> false.
+  EXPECT(PP_FALSE == PPBGraphics2D()->IsGraphics2D(kInvalidResource));
+  EXPECT(PP_FALSE == PPBGraphics2D()->IsGraphics2D(kNotAResource));
+  PP_Resource url_loader = PPBURLLoader()->Create(pp_instance());
+  CHECK(url_loader != kInvalidResource);
+  EXPECT(PP_FALSE == PPBGraphics2D()->IsGraphics2D(url_loader));
+  PPBCore()->ReleaseResource(url_loader);
+
+  // Current Graphics2D resource -> true.
+  PP_Resource graphics2d = PPBGraphics2D()->Create(
+      pp_instance(), &k30x30, kAlwaysOpaque);
+  EXPECT(PP_TRUE == PPBGraphics2D()->IsGraphics2D(graphics2d));
+
+  // Released Graphis2D resource -> false.
+  PPBCore()->ReleaseResource(graphics2d);
+  EXPECT(PP_FALSE == PPBGraphics2D()->IsGraphics2D(graphics2d));
+
+  TEST_PASSED;
+}
+
+// Tests PPB_Graphics2D::Describe().
+void TestDescribe() {
+  PP_Resource graphics2d = kInvalidResource;
+  const PPB_Graphics2D* ppb = PPBGraphics2D();
+  struct PP_Size size = k90x90;
+  PP_Bool is_always_opaque = PP_TRUE;
+
+  // Valid resource -> output = configuration, true.
+  graphics2d = ppb->Create(pp_instance(), &k30x30, kNotAlwaysOpaque);
+  EXPECT(PP_TRUE == ppb->Describe(graphics2d, &size, &is_always_opaque));
+  EXPECT(is_always_opaque == PP_FALSE && IsEqualSize(size, k30x30));
+  PPBCore()->ReleaseResource(graphics2d);
+
+  graphics2d = ppb->Create(pp_instance(), &k30x30, kAlwaysOpaque);
+  EXPECT(PP_TRUE == ppb->Describe(graphics2d, &size, &is_always_opaque));
+  EXPECT(is_always_opaque == PP_TRUE && IsEqualSize(size, k30x30));
+  PPBCore()->ReleaseResource(graphics2d);
+
+  // NULL outputs -> output = unchanged, false.
+  EXPECT(PP_FALSE == ppb->Describe(graphics2d, NULL, &is_always_opaque));
+  EXPECT(PP_FALSE == ppb->Describe(graphics2d, &size, NULL));
+  EXPECT(is_always_opaque == PP_TRUE && IsEqualSize(size, k30x30));
+
+  // Invalid / non-existent resource -> output = 0, false.
+  EXPECT(PP_FALSE == ppb->Describe(kInvalidResource, &size, &is_always_opaque));
+  EXPECT(is_always_opaque == PP_FALSE && IsEqualSize(size, kZeroPixels));
+
+  is_always_opaque = PP_TRUE;
+  size = k90x90;
+  EXPECT(PP_FALSE == ppb->Describe(kNotAResource, &size, &is_always_opaque));
+  EXPECT(is_always_opaque == PP_FALSE && IsEqualSize(size, kZeroPixels));
+
+  TEST_PASSED;
+}
+
+// Tests PPB_Graphics2D::PaintImageData() with specified image rect.
+// Draws a blue square in the top right corner.
+// Requires a visual inspection.
+void TestPaintImageData() {
+  const PPB_Graphics2D* ppb = PPBGraphics2D();
+  PP_Resource graphics2d = CreateGraphics2D_90x90();
+  PP_Resource image_data = CreateImageData(k60x60, kSheerBlue);
+  PP_Resource image_data_noop = CreateImageData(k60x60, kOpaqueBlack);
+  PP_Rect src_rect = { PP_MakePoint(30, 30), k30x30 };
+  PP_Point top_left = PP_MakePoint(30, -30);  // target origin = (60,  0);
+  PP_Point clip_up = PP_MakePoint(0, -31);    // target origin = (30, -1)
+  PP_Point clip_left = PP_MakePoint(-31, 0);  // target origin = (-1, 30)
+  PP_Point clip_right = PP_MakePoint(31, 0);  // target origin = (61, 30)
+  PP_Point clip_down = PP_MakePoint(0, 31);   // target origin = (30, 61)
+
+  // Valid args -> copies to backing store and paints to screen after Flush().
+  ppb->PaintImageData(graphics2d, image_data, &top_left, &src_rect);
+
+  // Invalid args -> no effect, no crash.
+  ppb->PaintImageData(kInvalidResource, image_data_noop, &top_left, &src_rect);
+  ppb->PaintImageData(kNotAResource, image_data_noop, &top_left, &src_rect);
+  ppb->PaintImageData(graphics2d, kInvalidResource, &top_left, &src_rect);
+  ppb->PaintImageData(graphics2d, kNotAResource, &top_left, &src_rect);
+  ppb->PaintImageData(graphics2d, image_data_noop, &clip_up, &src_rect);
+  ppb->PaintImageData(graphics2d, image_data_noop, &clip_left, &src_rect);
+  ppb->PaintImageData(graphics2d, image_data_noop, &clip_right, &src_rect);
+  ppb->PaintImageData(graphics2d, image_data_noop, &clip_down, &src_rect);
+  ppb->PaintImageData(graphics2d, image_data_noop, &kOrigin, &kBadRect);
+  // NULL top_left - > Internal error in rpc method.
+  ppb->PaintImageData(graphics2d, image_data_noop, NULL, &src_rect);
+  ppb->PaintImageData(kInvalidResource, kNotAResource, NULL, &src_rect);
+
+  // Paints backing store image to screen only after Flush().
+  PP_Point top_right = PP_MakePoint(60, 0);
+  EXPECT(!IsSquareOnScreen(graphics2d, top_right, k30x30, kSheerBlue));
+  PP_CompletionCallback cc = MakeTestableFlushCallback(
+      "PaintImageDataFlushCallback", graphics2d, image_data, 1);
+  EXPECT(PP_OK_COMPLETIONPENDING == ppb->Flush(graphics2d, cc));
+  EXPECT(IsSquareOnScreen(graphics2d, top_right, k30x30, kSheerBlue));
+
+  // This should have no effect on Flush().
+  ppb->PaintImageData(graphics2d, image_data_noop, &top_left, &src_rect);
+  PPBCore()->ReleaseResource(image_data_noop);
+
+  TEST_PASSED;
+}
+
+// Tests PPB_Graphics2D::PaintImageData() with default rect for entire image.
+// Draws a yellow square in the bottom left corner.
+// Requires a visual inspection.
+void TestPaintImageDataEntire() {
+  const PPB_Graphics2D* ppb = PPBGraphics2D();
+  PP_Resource graphics2d = CreateGraphics2D_90x90();
+  PP_Resource image_data = CreateImageData(k30x30, kOpaqueYellow);
+  PP_Resource image_data_noop = CreateImageData(k30x30, kOpaqueBlack);
+  PP_Point bottom_left = PP_MakePoint(0, 60);
+  PP_Point clip_up = PP_MakePoint(0, -1);
+  PP_Point clip_left = PP_MakePoint(-1, 0);
+  PP_Point clip_right = PP_MakePoint(61, 0);
+  PP_Point clip_down = PP_MakePoint(0, 61);
+
+  // Valid args -> copies to backing store.
+  ppb->PaintImageData(graphics2d, image_data, &bottom_left, kEntireImage);
+
+  // Invalid args -> no effect, no crash.
+  ppb->PaintImageData(
+      kInvalidResource, image_data_noop, &bottom_left, kEntireImage);
+  ppb->PaintImageData(
+      kNotAResource, image_data_noop, &bottom_left, kEntireImage);
+  ppb->PaintImageData(graphics2d, kInvalidResource, &bottom_left, kEntireImage);
+  ppb->PaintImageData(graphics2d, kNotAResource, &bottom_left, kEntireImage);
+  ppb->PaintImageData(graphics2d, image_data_noop, &clip_up, kEntireImage);
+  ppb->PaintImageData(graphics2d, image_data_noop, &clip_left, kEntireImage);
+  ppb->PaintImageData(graphics2d, image_data_noop, &clip_right, kEntireImage);
+  ppb->PaintImageData(graphics2d, image_data_noop, &clip_down, kEntireImage);
+  // NULL top_left - > Internal error in rpc method.
+  ppb->PaintImageData(graphics2d, image_data_noop, NULL, kEntireImage);
+  ppb->PaintImageData(kInvalidResource, kNotAResource, NULL, kEntireImage);
+
+  // Paints backing store image to the screen only after Flush().
+  EXPECT(!IsSquareOnScreen(graphics2d, bottom_left, k30x30, kOpaqueYellow));
+  PP_CompletionCallback cc = MakeTestableFlushCallback(
+      "PaintImageDataEntireFlushCallback", graphics2d, image_data, 1);
+  EXPECT(PP_OK_COMPLETIONPENDING == ppb->Flush(graphics2d, cc));
+  EXPECT(IsSquareOnScreen(graphics2d, bottom_left, k30x30, kOpaqueYellow));
+
+  // This should have no effect on Flush().
+  ppb->PaintImageData(graphics2d, image_data_noop, &bottom_left, kEntireImage);
+  PPBCore()->ReleaseResource(image_data_noop);
+
+  TEST_PASSED;
+}
+
+// Tests PPB_Graphics2D::Scroll() with specified image rect.
+// Draws a white square at the top left, then in the middle.
+// Requires a visual inspection.
+void TestScroll() {
+  const PPB_Graphics2D* ppb = PPBGraphics2D();
+  PP_Resource graphics2d = CreateGraphics2D_90x90();
+  PP_Resource image_data = CreateImageData(k30x30, kOpaqueWhite);
+  PP_Rect src_rect = { kOrigin, k30x30 };
+  PP_Rect clip_rect = { kOrigin, k60x60 };
+  PP_Point middle = PP_MakePoint(30, 30);
+  ppb->PaintImageData(graphics2d, image_data, &kOrigin, &src_rect);
+
+  // Valid args -> scrolls backing store and paints to screen after Flush().
+  ppb->Scroll(graphics2d, &clip_rect, &middle);
+
+  // Invalid args -> no effect, no crash.
+  ppb->Scroll(kInvalidResource, &clip_rect, &middle);
+  ppb->Scroll(kNotAResource, &clip_rect, &middle);
+  ppb->Scroll(graphics2d, &clip_rect, NULL);  // Internal error in rpc method.
+
+  // Paints backing store image to the sreen only after Flush().
+  EXPECT(!IsSquareOnScreen(graphics2d, middle, k30x30, kOpaqueWhite));
+  PP_CompletionCallback cc = MakeTestableFlushCallback(
+      "ScrollFlushCallback", graphics2d, image_data, 1);
+  EXPECT(PP_OK_COMPLETIONPENDING == ppb->Flush(graphics2d, cc));
+  EXPECT(IsSquareOnScreen(graphics2d, middle, k30x30, kOpaqueWhite));
+
+  TEST_PASSED;
+}
+
+// Tests PPB_Graphics2D::Scroll() with default rect for entire image..
+// Draws a green square in the top left, then bottom right.
+// Requires a visual inspection.
+void TestScrollEntire() {
+  const PPB_Graphics2D* ppb = PPBGraphics2D();
+  PP_Resource graphics2d = CreateGraphics2D_90x90();
+  PP_Resource image_data = CreateImageData(k30x30, kOpaqueGreen);
+  PP_Point bottom_right = PP_MakePoint(60, 60);
+  ppb->PaintImageData(graphics2d, image_data, &kOrigin, kEntireImage);
+
+  // Valid args -> scrolls backing store and paints to screen after Flush().
+  ppb->Scroll(graphics2d, kEntireImage, &bottom_right);
+
+  // Invalid args -> no crash.
+  ppb->Scroll(kInvalidResource, kEntireImage, &bottom_right);
+  ppb->Scroll(kNotAResource, kEntireImage, &bottom_right);
+  ppb->Scroll(graphics2d, kEntireImage, NULL);  // Internal error in rpc method.
+
+  // Paints backing store image to the screen only after Flush().
+  EXPECT(!IsSquareOnScreen(graphics2d, bottom_right, k30x30, kOpaqueGreen));
+  ppb->Scroll(graphics2d, kEntireImage, &bottom_right);
+  PP_CompletionCallback cc = MakeTestableFlushCallback(
+      "ScrollEntireFlushCallback", graphics2d, image_data, 1);
+  EXPECT(PP_OK_COMPLETIONPENDING == ppb->Flush(graphics2d, cc));
+  EXPECT(IsSquareOnScreen(graphics2d, bottom_right, k30x30, kOpaqueGreen));
+
+  TEST_PASSED;
+}
+
+// Tests PPB_Graphics2D::ReplaceContents().
+// Colors the entire graphics area gray.
+// Requires a visual inspection.
+void TestReplaceContents() {
+  PP_Resource graphics2d = CreateGraphics2D_90x90();
+  PP_Resource image_data = CreateImageData(k90x90, kSheerGray);
+  PP_Resource image_data_noop = CreateImageData(k90x90, kOpaqueBlack);
+  PP_Resource image_data_size_mismatch = CreateImageData(k30x30, kOpaqueBlack);
+
+  // Valid args -> replaces backing store.
+  PPBGraphics2D()->ReplaceContents(graphics2d, image_data);
+
+  // Invalid args -> no effect, no crash.
+  PPBGraphics2D()->ReplaceContents(kInvalidResource, image_data_noop);
+  PPBGraphics2D()->ReplaceContents(kNotAResource, image_data_noop);
+  PPBGraphics2D()->ReplaceContents(graphics2d, kInvalidResource);
+  PPBGraphics2D()->ReplaceContents(graphics2d, kNotAResource);
+  PPBGraphics2D()->ReplaceContents(kInvalidResource, kNotAResource);
+  PPBGraphics2D()->ReplaceContents(graphics2d, image_data_size_mismatch);
+
+  // Paints backing store image to the screen only after Flush().
+  EXPECT(!IsSquareOnScreen(graphics2d, kOrigin, k90x90, kSheerGray));
+  PP_CompletionCallback cc = MakeTestableFlushCallback(
+      "ReplaceContentsFlushCallback", graphics2d, image_data, 1);
+  EXPECT(PP_OK_COMPLETIONPENDING == PPBGraphics2D()->Flush(graphics2d, cc));
+  EXPECT(IsSquareOnScreen(graphics2d, kOrigin, k90x90, kSheerGray));
+
+  // This should have no effect on Flush().
+  PPBGraphics2D()->ReplaceContents(graphics2d, image_data_noop);
+  PPBCore()->ReleaseResource(image_data_noop);
+  PPBCore()->ReleaseResource(image_data_size_mismatch);
+
+  TEST_PASSED;
+}
+
+// Tests PPB_Graphics2D::Flush().
+void TestFlush() {
+  PP_Resource graphics2d = PPBGraphics2D()->Create(
+      pp_instance(), &k90x90, kAlwaysOpaque);
+  PP_CompletionCallback cc = MakeTestableFlushCallback(
+      "FlushCallback", graphics2d, kInvalidResource, 1);
+
+  // Invalid args -> PP_ERROR_BAD..., no callback.
+  EXPECT(PP_ERROR_BADRESOURCE == PPBGraphics2D()->Flush(kInvalidResource, cc));
+  EXPECT(PP_ERROR_BADRESOURCE == PPBGraphics2D()->Flush(kNotAResource, cc));
+  EXPECT(PP_ERROR_BADARGUMENT ==
+         PPBGraphics2D()->Flush(graphics2d, PP_BlockUntilComplete()));
+
+  // Valid args -> PP_OK_COMPLETIONPENDING, expect callback.
+  EXPECT(PP_OK_COMPLETIONPENDING == PPBGraphics2D()->Flush(graphics2d, cc));
+
+  // Duplicate call -> PP_ERROR_INPROGRESS, no callback.
+  EXPECT(PP_ERROR_INPROGRESS == PPBGraphics2D()->Flush(graphics2d, cc));
+
+  TEST_PASSED;
+}
+
+// Tests continious Paint/Flush chaining.
+void TestFlushAnimation() {
+  PP_Resource graphics2d = CreateGraphics2D_90x90();
+  PP_Resource image_data = CreateImageData(k30x30, kSheerRed);
+
+  PPBGraphics2D()->PaintImageData(graphics2d, image_data, &kOrigin, NULL);
+  PP_CompletionCallback cc = MakeTestableFlushCallback(
+      "FlushAnimationCallback", graphics2d, image_data, 10);
+  EXPECT(PP_OK_COMPLETIONPENDING == PPBGraphics2D()->Flush(graphics2d, cc));
+
+  TEST_PASSED;
+}
+
+// Stress testing of a large number of resources.
+void TestStress() {
+  // TODO(nfullagar): Increase the number of resources once the cause of the
+  // stress test flake is fixed.
+  const int kManyResources = 100;
+  PP_Resource graphics2d[kManyResources];
+  const PPB_Graphics2D* ppb = PPBGraphics2D();
+
+  for (int i = 0; i < kManyResources; i++) {
+    graphics2d[i] = ppb->Create(pp_instance(), &k30x30, kAlwaysOpaque);
+    EXPECT(graphics2d[i] != kInvalidResource);
+    EXPECT(PP_TRUE == ppb->IsGraphics2D(graphics2d[i]));
+  }
+  for (int i = 0; i < kManyResources; i++) {
+    PPBCore()->ReleaseResource(graphics2d[i]);
+    EXPECT(PP_FALSE == PPBGraphics2D()->IsGraphics2D(graphics2d[i]));
+  }
+
+  TEST_PASSED;
+}
+
+}  // namespace
+
+void SetupTests() {
+  RegisterTest("TestCreate", TestCreate);
+  RegisterTest("TestIsGraphics2D", TestIsGraphics2D);
+  RegisterTest("TestDescribe", TestDescribe);
+  RegisterTest("TestPaintImageData", TestPaintImageData);
+  RegisterTest("TestPaintImageDataEntire", TestPaintImageDataEntire);
+  RegisterTest("TestScroll", TestScroll);
+  RegisterTest("TestScrollEntire", TestScrollEntire);
+  RegisterTest("TestReplaceContents", TestReplaceContents);
+  RegisterTest("TestFlush", TestFlush);
+  RegisterTest("TestFlushAnimation", TestFlushAnimation);
+  RegisterTest("TestStress", TestStress);
+}
+
+void SetupPluginInterfaces() {
+  // none
+}