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1 // Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 /** |
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17 @file |
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18 @test |
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19 @internalComponent - Internal Symbian test code |
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20 */ |
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21 |
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22 #include "graphicsimagecomparison.h" |
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23 |
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24 /** |
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25 Compares the contents of a rectangular region of one bitmap with a similarly sized |
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26 rectangular region of another bitmap. |
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27 |
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28 @param aCompareSize, a const reference to a TSize object denoting the size of the |
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29 rectangular region for comparison.Negative and zero dimensions of this argument can |
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30 be passed in without returning a KErrArgument error. |
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31 @param aBitmap1Point, a const reference to a TPoint object denoting the top left |
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32 point of the rectangle in aBitmap1 used for comparison.. |
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33 @param aBitmap2Point, a const reference to a TPoint object denoting the top left |
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34 point of the rectangle in aBitmap2 used for comparison. |
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35 @param aBitmap1, a const reference to the first CFbsBitmap for use in comparison. |
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36 @param aBitmap2, a const reference to the second CFbsBitmap for use in comparison. |
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37 @param aComparisonMask, a bit mask to be applied to the bitmap pixel data before |
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38 performing the comparison, in the form 0xAARRGGBB. Defaults to 0xFFFFFFFF |
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39 @pre The rectanglular comparison region must reside wholly inside both of the bitmaps |
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40 @return KErrNone if the pixels contained in the bitmap rectangles are an exact match |
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41 or, otherwise, the count of the first unmatched pixel. Pixels are compared from TRUE |
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42 top-left to bottom-right in the horizontal direction (TRUE to cope with negative |
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43 dimensions of the aCompareSize object) An area of zero size will return KErrNone so |
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44 long as the pre-conditions are satisfied. |
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45 KErrArgument if the pre-conditions are not met. |
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46 */ |
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47 EXPORT_C TInt CTGraphicsImageComparison::CompareBitmaps(const TSize& aCompareSize, |
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48 const TPoint& aBitmap1Point, |
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49 const TPoint& aBitmap2Point, |
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50 const CFbsBitmap& aBitmap1, |
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51 const CFbsBitmap& aBitmap2, |
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52 const TUint32 aComparisonMask) |
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53 { |
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54 TInt err = CheckArguments(aCompareSize, |
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55 aBitmap1Point, |
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56 aBitmap2Point, |
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57 aBitmap1, |
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58 aBitmap2); |
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59 |
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60 if(err == KErrNone) |
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61 { |
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62 //Take local copies as cannot modify static arguments |
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63 TSize localSize(aCompareSize); |
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64 TPoint localPoint1(aBitmap1Point); |
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65 TPoint localPoint2(aBitmap2Point); |
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66 |
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67 //Cope with negative aCompareSize dimensions |
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68 if(aCompareSize.iWidth < 0) |
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69 { |
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70 localSize.iWidth = -localSize.iWidth; |
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71 localPoint1.iX = localPoint1.iX - localSize.iWidth; |
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72 localPoint2.iX = localPoint2.iX - localSize.iWidth; |
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73 } |
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74 |
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75 if(aCompareSize.iHeight < 0) |
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76 { |
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77 localSize.iHeight = -localSize.iHeight; |
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78 localPoint1.iY = localPoint1.iY - localSize.iHeight; |
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79 localPoint2.iY = localPoint2.iY - localSize.iHeight; |
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80 } |
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81 |
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82 // Set up buffers for obtaining scanlines |
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83 TInt scanLineLength1 = aBitmap1.ScanLineLength(localSize.iWidth, ERgb); |
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84 TUint8* buffer1 = new TUint8[scanLineLength1]; |
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85 if(!buffer1) |
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86 { |
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87 return KErrNoMemory; |
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88 } |
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89 TPtr8 scanLine1(buffer1, scanLineLength1, scanLineLength1); |
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90 TInt scanLineLength2 = aBitmap2.ScanLineLength(localSize.iWidth, ERgb); |
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91 TUint8* buffer2 = new TUint8[scanLineLength2]; |
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92 if(!buffer2) |
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93 { |
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94 delete[] buffer1; |
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95 return KErrNoMemory; |
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96 } |
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97 TPtr8 scanLine2(buffer1, scanLineLength2, scanLineLength2); |
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98 |
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99 //Perform scanline to scanline comparison without comparison mask |
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100 for(TInt y=0; y<localSize.iHeight; y++) |
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101 { |
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102 aBitmap1.GetScanLine(scanLine1, localPoint1+TPoint(0,y), localSize.iWidth, ERgb); |
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103 aBitmap2.GetScanLine(scanLine2, localPoint2+TPoint(0,y), localSize.iWidth, ERgb); |
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104 |
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105 if(aComparisonMask!=0xFFFFFFFF || scanLine1.Compare(scanLine2)!=0) |
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106 { |
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107 //Comparison mask has been set, or scanlines are not equal |
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108 //so perform pixel by pixel comparison using mask |
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109 TRgb pixel1, pixel2; |
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110 for(TInt x=0; x<localSize.iWidth; x++) |
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111 { |
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112 pixel1 = *(((TRgb*)buffer1) + x); |
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113 pixel2 = *(((TRgb*)buffer1) + x); |
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114 |
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115 if( (pixel1.Internal()& aComparisonMask) != (pixel2.Internal()& aComparisonMask)) |
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116 { |
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117 RDebug::Print(_L("x = %d y = %d pixel1= %x pixel2 = %x"), x, y, pixel1.Internal(), pixel2.Internal()); |
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118 delete[] buffer2; |
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119 delete[] buffer1; |
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120 return (y*localSize.iWidth + x) + 1; |
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121 } |
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122 } |
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123 } |
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124 } |
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125 delete[] buffer2; |
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126 delete[] buffer1; |
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127 } |
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128 return err; |
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129 } |
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130 |
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131 /** |
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132 Compares the contents of a rectangular region of a bitmap with a reference colour. |
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133 |
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134 @param aCompareSize, a const reference to a TSize object denoting the size of the |
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135 rectangular region for comparison.Negative and zero dimensions of this argument can |
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136 be passed in without returning a KErrArgument error. |
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137 @param aBitmapPoint, a const reference to a TPoint object denoting the top left |
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138 point of the rectangle in aBitmap1 used for comparison.. |
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139 @param aBitmap, a const reference to the CFbsBitmap for use in comparison. |
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140 @param aColor, the colour to test for |
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141 @param aComparisonMask, a bit mask to be applied to both the bitmap pixel data and the |
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142 colour data before performing the comparison, in the form 0xAARRGGBB. Defaults to 0xFFFFFFFF |
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143 @pre The rectanglular comparison region must reside wholly inside the bitmap |
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144 @return KErrNone if the pixels contained in the bitmap rectangles are an exact match |
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145 to the reference colour or, otherwise, the count of the first unmatched pixel. Pixels |
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146 are compared from TRUE top-left to bottom-right in the horizontal direction (TRUE to |
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147 cope with negative dimensions of the aCompareSize object) An area of zero size will |
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148 return KErrNone so long as the pre-conditions are satisfied. |
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149 KErrArgument if the pre-conditions are not met. |
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150 */ |
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151 EXPORT_C TInt CTGraphicsImageComparison::CompareBitmaps(const TSize& aCompareSize, |
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152 const TPoint& aBitmapPoint, |
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153 const CFbsBitmap& aBitmap, |
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154 const TRgb& aColor, |
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155 const TUint32 aComparisonMask) |
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156 { |
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157 TInt err = CheckArgumentBitmap(aCompareSize, |
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158 aBitmapPoint, |
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159 aBitmap); |
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160 |
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161 if(err == KErrNone) |
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162 { |
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163 //Take local copies as cannot modify static arguments |
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164 TSize localSize(aCompareSize); |
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165 TPoint localPoint(aBitmapPoint); |
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166 |
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167 //Cope with negative aCompareSize dimensions |
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168 if(aCompareSize.iWidth < 0) |
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169 { |
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170 localSize.iWidth = -localSize.iWidth; |
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171 localPoint.iX = localPoint.iX - localSize.iWidth; |
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172 } |
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173 |
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174 if(aCompareSize.iHeight < 0) |
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175 { |
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176 localSize.iHeight = -localSize.iHeight; |
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177 localPoint.iY = localPoint.iY - localSize.iHeight; |
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178 } |
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179 |
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180 // Set up buffers for obtaining scanlines |
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181 TInt scanLineLength = aBitmap.ScanLineLength(localSize.iWidth, ERgb); |
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182 TUint8* buffer = new TUint8[scanLineLength]; |
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183 if(!buffer) |
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184 { |
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185 return KErrNoMemory; |
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186 } |
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187 TPtr8 scanLine(buffer, scanLineLength, scanLineLength); |
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188 |
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189 //Perform the pixel by pixel comparison |
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190 TRgb pixel; |
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191 for(TInt y=0; y<localSize.iHeight; y++) |
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192 { |
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193 aBitmap.GetScanLine(scanLine, localPoint+TPoint(0,y), localSize.iWidth, ERgb); |
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194 for(TInt x=0; x<localSize.iWidth; x++) |
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195 { |
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196 pixel = *(((TRgb*)buffer) + x); |
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197 |
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198 if( (pixel.Internal()& aComparisonMask) != (aColor.Internal()& aComparisonMask)) |
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199 { |
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200 RDebug::Print(_L("x = %d y = %d pixel= %x reference colour = %x"), x, y, pixel.Internal(), aColor.Internal()); |
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201 delete[] buffer; |
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202 return (y*localSize.iWidth + x) + 1; |
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203 } |
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204 } |
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205 } |
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206 delete[] buffer; |
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207 } |
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208 return err; |
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209 } |
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210 |
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211 TInt CTGraphicsImageComparison::CheckArguments(const TSize& aCompareSize, |
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212 const TPoint& aBitmap1Point, |
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213 const TPoint& aBitmap2Point, |
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214 const CFbsBitmap& aBitmap1, |
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215 const CFbsBitmap& aBitmap2) |
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216 { |
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217 //Test that the arguments are valid for both bitmaps |
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218 TInt err = CheckArgumentBitmap(aCompareSize, aBitmap1Point, aBitmap1); |
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219 |
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220 if(err == KErrNone) |
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221 { |
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222 err = CheckArgumentBitmap(aCompareSize, aBitmap2Point, aBitmap2); |
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223 } |
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224 |
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225 return err; |
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226 } |
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227 |
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228 TInt CTGraphicsImageComparison::CheckArgumentBitmap(const TSize& aSize, |
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229 const TPoint& aPoint, |
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230 const CFbsBitmap& aBitmap) |
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231 { |
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232 //Top left-hand corner of the comparison rectangle is outside of the bitmap |
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233 if( (aPoint.iX < 0) || (aPoint.iY < 0) ) |
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234 { |
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235 return KErrArgument; |
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236 } |
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237 |
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238 if(aSize.iWidth >= 0) |
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239 { |
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240 //Comparison rectangle is outside of the bitmap (rhs) |
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241 if(aPoint.iX + aSize.iWidth > aBitmap.SizeInPixels().iWidth) |
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242 { |
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243 return KErrArgument; |
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244 } |
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245 } |
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246 else |
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247 { |
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248 //Comparison rectangle is outside of the bitmap (lhs) |
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249 if(aPoint.iX + aSize.iWidth < 0) |
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250 { |
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251 return KErrArgument; |
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252 } |
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253 } |
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254 |
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255 if(aSize.iHeight >= 0) |
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256 { |
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257 //Comparison rectangle is outside of the bitmap (bottom) |
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258 if(aPoint.iY + aSize.iHeight > aBitmap.SizeInPixels().iHeight) |
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259 { |
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260 return KErrArgument; |
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261 } |
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262 } |
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263 else |
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264 { |
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265 //Comparison rectangle is outside of the bitmap (top) |
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266 if(aPoint.iY + aSize.iHeight < 0) |
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267 { |
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268 return KErrArgument; |
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269 } |
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270 } |
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271 |
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272 return KErrNone; |
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273 } |