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1 /* |
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2 * Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Graphics Extension Library header file |
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15 * |
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16 */ |
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17 |
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18 |
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19 #ifndef GFXIMAGETRANSFORMER_H |
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20 #define GFXIMAGETRANSFORMER_H |
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21 |
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22 #include <e32std.h> |
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23 #include <fbs.h> |
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24 #include <bitstd.h> |
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25 |
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26 #include "GfxFloatFixPt.h" |
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27 #include "GfxAffineTransform.h" |
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28 #include "GfxRenderingHints.h" |
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29 #include "GfxRectangle2D.h" |
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30 #include "GfxPoint2D.h" |
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31 #include "GfxColor.h" |
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32 |
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33 |
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34 class CVGRenderer; |
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35 |
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36 /** |
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37 * Class to perform transformation on an image. |
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38 * |
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39 * @lib Gfx2D.lib |
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40 * @since 1.0 |
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41 */ |
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42 class TGfxImageTransformer |
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43 { |
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44 public: |
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45 |
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46 /** |
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47 * Contructor. |
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48 * |
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49 * @since 1.0 |
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50 * @param aTransform : transform to apply. |
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51 * @param aInterpolation : image interpolation |
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52 * @return |
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53 */ |
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54 TGfxImageTransformer( TGfxAffineTransform* aTransform, CVGRenderer * aRenderer); |
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55 |
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56 |
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57 /** |
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58 * Draw the source image onto the destination with the transformation defined by |
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59 * this object, blending with the alpha value. |
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60 * |
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61 * @since 1.0 |
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62 * @param aSrc : source image |
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63 * @param aPoint : origin point of the text rectangle. |
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64 * @param aDst : destination image buffer. |
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65 * @param aDstWidth : destination image width. |
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66 * @param aDstHeight : destination image height. |
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67 * @param aAlpha : blending alpha value. |
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68 * @param aClipRect : |
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69 * @param aReverse : ETrue if copying image from aDst to aSrc. |
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70 * This is a special case and used to copy background image to text box. |
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71 * EFalse is for regular use. |
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72 * @return |
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73 */ |
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74 void Draw( CFbsBitmap* aSrc, |
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75 const TGfxPoint2D& p, |
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76 TUint32* aDst, |
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77 TInt aDstWidth, |
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78 TInt aDstHeight, |
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79 TUint8 aAlpha, |
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80 TGfxColor aTransparentColor, |
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81 const TRect& aClipRect, |
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82 TBool aReverse = EFalse |
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83 ); |
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84 |
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85 /** |
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86 * Draw the source image onto the destination with the transformation defined by |
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87 * this object. Uses the alpha bits of the EColor16MU to blend. Only EColor16MU mode |
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88 * for aSrc is allowed. |
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89 * |
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90 * @since 1.0 |
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91 * @param aSrc : source image |
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92 * @param aPoint : origin point of the text rectangle. |
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93 * @param aDst : destination image buffer. |
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94 * @param aDstWidth : destination image width. |
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95 * @param aDstHeight : destination image height. |
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96 * @param aClipRect : |
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97 * @param aReverse : ETrue if copying image from aDst to aSrc. |
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98 * This is a special case and used to copy background image to text box. |
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99 * EFalse is for regular use. |
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100 * @return |
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101 */ |
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102 void Draw( CFbsBitmap* aSrc, |
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103 const TGfxPoint2D& p, |
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104 TUint32* aDst, |
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105 TInt aDstWidth, |
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106 TInt aDstHeight, |
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107 const TRect& aClipRect |
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108 ); |
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109 |
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110 |
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111 /** |
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112 * Get the bounding box for the given image once transformed. |
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113 * |
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114 * @since 1.0 |
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115 * @param aSrc : source image |
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116 * @param aOffset : offset. |
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117 * @return |
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118 */ |
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119 TGfxRectangle2D GetTransformedBound( CFbsBitmap* aSrc, |
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120 const TGfxPoint2D& aOffset ); |
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121 /** |
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122 * Draw the source image onto the destination with the transformation defined by |
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123 * this object, blending with the alpha value. When aReverse is ETrue, do the reverse. |
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124 * |
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125 * @since 1.0 |
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126 * @param aSrc : source image |
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127 * @param aPoint : origin point of the text rectangle. |
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128 * @param aDstWidth : destination image width. |
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129 * @param aDstHeight : destination image height. |
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130 * @param aClipRect : |
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131 * @param aReverse : ETrue if copying image from aDst to aSrc. |
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132 * This is a special case and used to copy background image to text box. |
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133 * EFalse is for regular use. |
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134 * @return |
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135 */ |
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136 void ImageBlend( CFbsBitmap* aSrc, |
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137 const TGfxPoint2D& p, |
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138 TInt aDstWidth, |
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139 TInt aDstHeight, |
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140 const TRect& aClipRect, |
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141 TBool aReverse = EFalse |
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142 ); |
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143 |
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144 /** |
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145 * Compute scanline starting/end position for the rectangle. |
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146 * |
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147 * @since 1.0 |
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148 * @param y : current rectangle's height |
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149 * @param rect : rectangle that needs to be computed. |
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150 * @param north : transformed corner. |
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151 * @param west : transformed corner. |
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152 * @param east : transformed corner. |
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153 * @param south : transformed corner. |
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154 * @param xstart : computed x coordinates for start position |
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155 * @param xend : computed x coordinates for end position |
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156 * |
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157 * @return none |
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158 */ |
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159 void ComputeXPositions(TFloatFixPt y, TRect rect, TGfxPoint2D north, TGfxPoint2D west, |
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160 TGfxPoint2D east, TGfxPoint2D south, TInt& xstart, TInt& xend); |
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161 |
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162 /** |
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163 * compute coordinates from transformed 4 points. |
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164 * |
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165 * @since 1.0 |
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166 * |
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167 * @return none |
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168 */ |
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169 void SortCoordinates(TGfxPoint2D& origin, TGfxPoint2D& top, |
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170 TGfxPoint2D& north, TGfxPoint2D& south, TGfxPoint2D& right, |
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171 TGfxPoint2D& east, TGfxPoint2D& west, TGfxPoint2D& corner, |
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172 TGfxPoint2D aP, const TInt srcWidth, const TInt srcHeight); |
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173 |
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174 private: |
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175 |
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176 TGfxAffineTransform* iTransform; |
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177 CVGRenderer * iVgRenderer; |
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178 }; |
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179 |
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180 #endif // GFXIMAGETRANSFORMER_H |