vcl/qa/cppunit/BitmapExTest.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  */
   9
  10 #include <cppunit/TestAssert.h>
  11 #include <cppunit/TestFixture.h>
  12 #include <cppunit/extensions/HelperMacros.h>
  13
  14 #include <vcl/bitmapex.hxx>
  15 #include <basegfx/matrix/b2dhommatrix.hxx>
  16 #include <bitmapwriteaccess.hxx>
  17 #include <svdata.hxx>
  18 #include <salinst.hxx>
  19
  20 namespace
  21 {
  22 class BitmapExTest : public CppUnit::TestFixture
  23 {
  24     void testGetPixelColor24_8();
  25     void testGetPixelColor32();
  26     void testTransformBitmapEx();
  27
  28     CPPUNIT_TEST_SUITE(BitmapExTest);
  29     CPPUNIT_TEST(testGetPixelColor24_8);
  30     CPPUNIT_TEST(testGetPixelColor32);
  31     CPPUNIT_TEST(testTransformBitmapEx);
  32     CPPUNIT_TEST_SUITE_END();
  33 };
  34
  35 void BitmapExTest::testGetPixelColor24_8()
  36 {
  37     Bitmap aBitmap(Size(3, 3), 24);
  38     {
  39         BitmapScopedWriteAccess pWriteAccess(aBitmap);
  40         pWriteAccess->Erase(Color(0x00, 0x00, 0xFF, 0x00));
  41     }
  42     AlphaMask aMask(Size(3, 3));
  43     {
  44         AlphaScopedWriteAccess pWriteAccess(aMask);
  45         pWriteAccess->Erase(Color(0x00, 0xAA, 0xAA, 0xAA));
  46     }
  47
  48     BitmapEx aBitmapEx(aBitmap, aMask);
  49
  50     CPPUNIT_ASSERT_EQUAL(Color(0xAA, 0x00, 0xFF, 0x00), aBitmapEx.GetPixelColor(0, 0));
  51 }
  52
  53 void BitmapExTest::testGetPixelColor32()
  54 {
  55     // Check backend capabilities and return from the test successfully
  56     // if the backend doesn't support 32-bit bitmap
  57     auto pBackendCapabilities = ImplGetSVData()->mpDefInst->GetBackendCapabilities();
  58     if (!pBackendCapabilities->mbSupportsBitmap32)
  59         return;
  60
  61     Bitmap aBitmap(Size(3, 3), 32);
  62     {
  63         BitmapScopedWriteAccess pWriteAccess(aBitmap);
  64         pWriteAccess->Erase(Color(0xAA, 0x00, 0xFF, 0x00));
  65     }
  66
  67     BitmapEx aBitmapEx(aBitmap);
  68
  69     CPPUNIT_ASSERT_EQUAL(Color(0xAA, 0x00, 0xFF, 0x00), aBitmapEx.GetPixelColor(0, 0));
  70 }
  71
  72 void BitmapExTest::testTransformBitmapEx()
  73 {
  74     Bitmap aBitmap(Size(16, 16), 24);
  75     {
  76         BitmapScopedWriteAccess pWriteAccess(aBitmap);
  77         pWriteAccess->Erase(COL_WHITE);
  78         for (int i = 0; i < 8; ++i)
  79         {
  80             for (int j = 0; j < 8; ++j)
  81             {
  82                 pWriteAccess->SetPixel(i, j, COL_BLACK);
  83             }
  84         }
  85     }
  86     BitmapEx aBitmapEx(aBitmap);
  87
  88     basegfx::B2DHomMatrix aMatrix;
  89     aMatrix.rotate(M_PI / 2);
  90     BitmapEx aTransformed = aBitmapEx.TransformBitmapEx(16, 16, aMatrix);
  91     aBitmap = aTransformed.GetBitmap();
  92     Bitmap::ScopedReadAccess pAccess(aBitmap);
  93     for (int i = 0; i < 16; ++i)
  94     {
  95         for (int j = 0; j < 16; ++j)
  96         {
  97             BitmapColor aColor = pAccess->GetPixel(i, j);
  98             std::stringstream ss;
  99             ss << "Color is expected to be white or black, is '" << aColor.AsRGBHexString() << "'";
 100             // Without the accompanying fix in place, this test would have failed with:
 101             // - Expression: aColor == COL_WHITE || aColor == COL_BLACK
 102             // - Color is expected to be white or black, is 'bfbfbf'
 103             // i.e. smoothing introduced noise for a simple 90 deg rotation.
 104             CPPUNIT_ASSERT_MESSAGE(ss.str(), aColor == COL_WHITE || aColor == COL_BLACK);
 105         }
 106     }
 107 }
 108
 109 } // namespace
 110
 111 CPPUNIT_TEST_SUITE_REGISTRATION(BitmapExTest);
 112
 113 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */