content/renderer/pepper/pepper_graphics_2d_host_unittest.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 "content/renderer/pepper/pepper_graphics_2d_host.h"
   6
   7 #include "base/basictypes.h"
   8 #include "testing/gtest/include/gtest/gtest.h"
   9 #include "ui/gfx/point.h"
  10 #include "ui/gfx/rect.h"
  11
  12 namespace content {
  13
  14 class PepperGraphics2DHostTest : public testing::Test {
  15  public:
  16   static bool ConvertToLogicalPixels(float scale,
  17                                      gfx::Rect* op_rect,
  18                                      gfx::Point* delta) {
  19     return PepperGraphics2DHost::ConvertToLogicalPixels(scale, op_rect, delta);
  20   }
  21 };
  22
  23 TEST_F(PepperGraphics2DHostTest, ConvertToLogicalPixels) {
  24   static const struct {
  25     int x1;
  26     int y1;
  27     int w1;
  28     int h1;
  29     int x2;
  30     int y2;
  31     int w2;
  32     int h2;
  33     int dx1;
  34     int dy1;
  35     int dx2;
  36     int dy2;
  37     float scale;
  38     bool result;
  39   } tests[] = {
  40     { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1.0, true },
  41     { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2.0, true },
  42     { 0, 0, 4, 4, 0, 0, 2, 2, 0, 0, 0, 0, 0.5, true },
  43     { 1, 1, 4, 4, 0, 0, 3, 3, 0, 0, 0, 0, 0.5, false },
  44     { 53, 75, 100, 100, 53, 75, 100, 100, 0, 0, 0, 0, 1.0, true },
  45     { 53, 75, 100, 100, 106, 150, 200, 200, 0, 0, 0, 0, 2.0, true },
  46     { 53, 75, 100, 100, 26, 37, 51, 51, 0, 0, 0, 0, 0.5, false },
  47     { 53, 74, 100, 100, 26, 37, 51, 50, 0, 0, 0, 0, 0.5, false },
  48     { -1, -1, 100, 100, -1, -1, 51, 51, 0, 0, 0, 0, 0.5, false },
  49     { -2, -2, 100, 100, -1, -1, 50, 50, 4, -4, 2, -2, 0.5, true },
  50     { -101, -100, 50, 50, -51, -50, 26, 25, 0, 0, 0, 0, 0.5, false },
  51     { 10, 10, 20, 20, 5, 5, 10, 10, 0, 0, 0, 0, 0.5, true },
  52       // Cannot scroll due to partial coverage on sides
  53     { 11, 10, 20, 20, 5, 5, 11, 10, 0, 0, 0, 0, 0.5, false },
  54       // Can scroll since backing store is actually smaller/scaling up
  55     { 11, 20, 100, 100, 22, 40, 200, 200, 7, 3, 14, 6, 2.0, true },
  56       // Can scroll due to delta and bounds being aligned
  57     { 10, 10, 20, 20, 5, 5, 10, 10, 6, 4, 3, 2, 0.5, true },
  58       // Cannot scroll due to dx
  59     { 10, 10, 20, 20, 5, 5, 10, 10, 5, 4, 2, 2, 0.5, false },
  60       // Cannot scroll due to dy
  61     { 10, 10, 20, 20, 5, 5, 10, 10, 6, 3, 3, 1, 0.5, false },
  62       // Cannot scroll due to top
  63     { 10, 11, 20, 20, 5, 5, 10, 11, 6, 4, 3, 2, 0.5, false },
  64       // Cannot scroll due to left
  65     { 7, 10, 20, 20, 3, 5, 11, 10, 6, 4, 3, 2, 0.5, false },
  66       // Cannot scroll due to width
  67     { 10, 10, 21, 20, 5, 5, 11, 10, 6, 4, 3, 2, 0.5, false },
  68       // Cannot scroll due to height
  69     { 10, 10, 20, 51, 5, 5, 10, 26, 6, 4, 3, 2, 0.5, false },
  70       // Check negative scroll deltas
  71     { 10, 10, 20, 20, 5, 5, 10, 10, -6, -4, -3, -2, 0.5, true },
  72     { 10, 10, 20, 20, 5, 5, 10, 10, -6, -3, -3, -1, 0.5, false },
  73   };
  74   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i) {
  75     gfx::Rect r1(tests[i].x1, tests[i].y1, tests[i].w1, tests[i].h1);
  76     gfx::Rect r2(tests[i].x2, tests[i].y2, tests[i].w2, tests[i].h2);
  77     gfx::Rect orig = r1;
  78     gfx::Point delta(tests[i].dx1, tests[i].dy1);
  79     bool res = ConvertToLogicalPixels(tests[i].scale, &r1, &delta);
  80     EXPECT_EQ(r2.ToString(), r1.ToString());
  81     EXPECT_EQ(res, tests[i].result);
  82     if (res) {
  83       EXPECT_EQ(delta, gfx::Point(tests[i].dx2, tests[i].dy2));
  84     }
  85     // Reverse the scale and ensure all the original pixels are still inside
  86     // the result.
  87     ConvertToLogicalPixels(1.0f / tests[i].scale, &r1, NULL);
  88     EXPECT_TRUE(r1.Contains(orig));
  89   }
  90 }
  91
  92 }  // namespace content