test_bitmap_base.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2019 KiCad Developers, see AUTHORS.TXT for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include <qa_utils/wx_utils/unit_test_utils.h>

// Code under test
#include <bitmap_base.h>

#include "wximage_test_utils.h"

#include <wx/mstream.h>


// Dummy PNG image 8x8, 4 tiles:
//
// green, black,
// red, blue
// ( the black tile is a a circle, otherwise older wx's seem to crash)
static const std::vector<unsigned char> png_data_4tile = { //
 0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A, 0x00, 0x00, 0x00, 0x0D, 0x49, 0x48, 0x44, 0x52,
 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x08, 0x08, 0x06, 0x00, 0x00, 0x00, 0xC4, 0x0F, 0xBE,
 0x8B, 0x00, 0x00, 0x00, 0x04, 0x73, 0x42, 0x49, 0x54, 0x08, 0x08, 0x08, 0x08, 0x7C, 0x08, 0x64,
 0x88, 0x00, 0x00, 0x00, 0x09, 0x70, 0x48, 0x59, 0x73, 0x00, 0x00, 0x0E, 0xC4, 0x00, 0x00, 0x0E,
 0xC4, 0x01, 0x95, 0x2B, 0x0E, 0x1B, 0x00, 0x00, 0x00, 0x19, 0x74, 0x45, 0x58, 0x74, 0x53, 0x6F,
 0x66, 0x74, 0x77, 0x61, 0x72, 0x65, 0x00, 0x77, 0x77, 0x77, 0x2E, 0x69, 0x6E, 0x6B, 0x73, 0x63,
 0x61, 0x70, 0x65, 0x2E, 0x6F, 0x72, 0x67, 0x9B, 0xEE, 0x3C, 0x1A, 0x00, 0x00, 0x00, 0x40, 0x49,
 0x44, 0x41, 0x54, 0x18, 0x95, 0xA5, 0xCD, 0x4B, 0x0A, 0xC0, 0x20, 0x14, 0x43, 0xD1, 0x63, 0x77,
 0xA7, 0xDD, 0xFF, 0x06, 0xD4, 0x7D, 0x3C, 0x07, 0x95, 0x42, 0x3F, 0xE0, 0xC0, 0x84, 0x0C, 0x02,
 0xE1, 0x86, 0x78, 0x99, 0x13, 0x1D, 0x0D, 0xC5, 0xCF, 0xA0, 0x21, 0x66, 0xEA, 0x61, 0xA9, 0x2F,
 0xA1, 0x4C, 0x4A, 0x45, 0x4E, 0x71, 0xA1, 0x6E, 0xA5, 0x67, 0xB5, 0xBC, 0xD8, 0x1F, 0x0C, 0xA7,
 0xFD, 0x23, 0x67, 0x70, 0xDA, 0x89, 0xA2, 0x00, 0x00, 0x00, 0x00, 0x49, 0x45, 0x4E, 0x44, 0xAE,
 0x42, 0x60, 0x82
};

static const wxSize size_4tile{ 8, 8 };

static const KIGFX::COLOR4D col_red{ 1.0, 0.0, 0.0, 1.0 };
static const KIGFX::COLOR4D col_green{ 0.0, 1.0, 0.0, 1.0 };
static const KIGFX::COLOR4D col_blue{ 0.0, 0.0, 1.0, 1.0 };
static const KIGFX::COLOR4D col_black{ 0.0, 0.0, 0.0, 1.0 };


class TEST_BITMAP_BASE_FIXTURE
{
public:
 TEST_BITMAP_BASE_FIXTURE()
 {
 wxMemoryInputStream mis( png_data_4tile.data(), png_data_4tile.size() );

 bool ok = m_4tile.ReadImageFile( mis );

 // this is needed for most tests and can fail if the image handlers
 // are not initialised (e.g. with wxInitAllImageHandlers)
 BOOST_REQUIRE( ok );

 // use an easier scale for test purposes
 m_4tile.SetPixelSizeIu( 2.0 );
 m_4tile.SetScale( 5.0 );
 }

 /*
 * Simple image of 4 coloured tiles
 */
 BITMAP_BASE m_4tile;
};


BOOST_FIXTURE_TEST_SUITE( BitmapBase, TEST_BITMAP_BASE_FIXTURE )



BOOST_AUTO_TEST_CASE( Empty )
{
 BITMAP_BASE empty;
 // Const to test we can get this data from a const object
 const BITMAP_BASE& cempty = empty;

 BOOST_CHECK_EQUAL( cempty.GetImageData(), nullptr );
 BOOST_CHECK_EQUAL( cempty.GetPPI(), 300 );
 BOOST_CHECK_EQUAL( cempty.GetScale(), 1.0 );
 BOOST_CHECK_EQUAL( cempty.GetPixelSizeIu(), 254000.0 / 300.0 );

 // can do this on an empty image
 empty.Rotate( true );
 empty.Mirror( true );
}


BOOST_AUTO_TEST_CASE( EmptyCopy )
{
 BITMAP_BASE empty;
 BITMAP_BASE copied = empty;

 // should still have nothing in it
 BOOST_CHECK_EQUAL( copied.GetImageData(), nullptr );
}


struct TEST_PIXEL_CASE
{
 int m_x;
 int m_y;
 KIGFX::COLOR4D m_color;
};


BOOST_AUTO_TEST_CASE( BasicProps )
{
 // make sure we can do all this to a const img
 const BITMAP_BASE& img = m_4tile;

 // have "some" image data
 BOOST_REQUIRE_NE( img.GetImageData(), nullptr );

 // still default props here
 BOOST_CHECK_EQUAL( img.GetPPI(), 300 );
 BOOST_CHECK_EQUAL( img.GetScale(), 5.0 );

 // we changed this, make sure it's right
 BOOST_CHECK_EQUAL( img.GetPixelSizeIu(), 2.0 );

 BOOST_CHECK( img.GetSizePixels() == size_4tile );
 BOOST_CHECK( img.GetSize() == size_4tile * 10 );

 const EDA_RECT bb = img.GetBoundingBox();
 BOOST_CHECK( bb.GetPosition() == wxPoint( -40, -40 ) );
 BOOST_CHECK( bb.GetEnd() == wxPoint( 40, 40 ) );
}


BOOST_AUTO_TEST_CASE( BasicImage )
{
 const wxImage* img_data = m_4tile.GetImageData();
 BOOST_REQUIRE_NE( img_data, nullptr );

 // green, black,
 // red, blue
 const std::vector<TEST_PIXEL_CASE> exp_pixels = {
 { 1, 1, col_green },
 { 6, 1, col_black },
 { 1, 6, col_red },
 { 6, 6, col_blue },
 };

 for( const auto& c : exp_pixels )
 {
 BOOST_CHECK_PREDICATE(
 KI_TEST::IsImagePixelOfColor, ( *img_data )( c.m_x )( c.m_y )( c.m_color ) );
 }
}

BOOST_AUTO_TEST_CASE( RotateImage )
{
 // Note the parameter name is wrong here, true is clockwise
 m_4tile.Rotate( false );

 const wxImage* img_data = m_4tile.GetImageData();
 BOOST_REQUIRE_NE( img_data, nullptr );

 // black, blue,
 // green, red
 const std::vector<TEST_PIXEL_CASE> exp_pixels = {
 { 1, 1, col_black },
 { 6, 1, col_blue },
 { 1, 6, col_green },
 { 6, 6, col_red },
 };

 for( const auto& c : exp_pixels )
 {
 BOOST_CHECK_PREDICATE(
 KI_TEST::IsImagePixelOfColor, ( *img_data )( c.m_x )( c.m_y )( c.m_color ) );
 }
}

BOOST_AUTO_TEST_CASE( MirrorImage )
{
 m_4tile.Mirror( true );

 const wxImage* img_data = m_4tile.GetImageData();
 BOOST_REQUIRE_NE( img_data, nullptr );

 // red, blue
 // green, black
 const std::vector<TEST_PIXEL_CASE> exp_pixels = {
 { 1, 1, col_red },
 { 6, 1, col_blue },
 { 1, 6, col_green },
 { 6, 6, col_black },
 };

 for( const auto& c : exp_pixels )
 {
 BOOST_CHECK_PREDICATE(
 KI_TEST::IsImagePixelOfColor, ( *img_data )( c.m_x )( c.m_y )( c.m_color ) );
 }
}

BOOST_AUTO_TEST_SUITE_END()