1 /* |
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2 * Copyright (c) 2009 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: |
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15 * |
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16 */ |
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17 |
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18 #ifndef HGVHELPER_H_ |
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19 #define HGVHELPER_H_ |
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20 |
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21 // INCLUDES |
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22 #include <e32base.h> |
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23 #include <e32std.h> |
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24 #include <gdi.h> |
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25 #include <VG/openvg.h> |
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26 |
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27 // FORWARD DECLARATIONS |
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28 class CFbsBitmap; |
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29 class CHgVgEGL; |
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30 class CGulIcon; |
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31 |
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32 #define RGBA(r, g, b, a) ((VGuint) (((r) << 24) | ((g) << 16) | ((b) << 8) | (a))) |
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33 |
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34 |
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35 /** |
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36 * Helper classes and methods for CHgVg* classes. |
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37 */ |
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38 namespace HgVgHelper |
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39 { |
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40 /**-------------------------------------------------------------- |
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41 * Vertex and Matrix manipulations helper classes |
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42 --------------------------------------------------------------*/ |
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43 |
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44 // Forward declarations |
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45 class TMatrix; |
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46 class TVertex; |
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47 |
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48 /** |
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49 * 3D Vertex class |
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50 */ |
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51 class TVertex |
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52 { |
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53 public: |
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54 // model coordinates |
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55 VGfloat iX, iY, iZ; |
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56 |
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57 // transformed mode-view-coordinates |
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58 VGfloat iTx, iTy, iTz; |
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59 |
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60 // projected screen coordinates |
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61 VGfloat iScreenX; |
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62 VGfloat iScreenY; |
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63 |
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64 /** |
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65 * Projects model-view-coordinates to screen space coordinates. |
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66 * |
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67 * @param aScreenWidth width of the rendering window |
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68 * @param aScreenHeight height of the rendering window |
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69 * @param aFov field of view to use |
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70 */ |
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71 void ProjectPoint(VGfloat aScreenWidth, VGfloat aScreenHeight, VGfloat aFov); |
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72 |
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73 /** |
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74 * Transform model coordinates by matrix given and sets |
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75 * result to tranformed model-view-coordinates. |
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76 * |
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77 * @param aMatrix model-view-transformation matrix. |
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78 */ |
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79 void TransformPoint(const TMatrix& aMatrix); |
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80 }; |
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81 |
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82 /** |
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83 * 4x4 Matrix class |
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84 */ |
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85 class TMatrix |
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86 { |
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87 public: |
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88 // matrix data |
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89 VGfloat iM[4][4]; |
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90 |
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91 // Construction and destruction. |
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92 TMatrix(); |
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93 TMatrix(const TMatrix& rhs); |
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94 ~TMatrix(); |
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95 |
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96 // Operators |
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97 TMatrix& operator=(const TMatrix& rhs); |
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98 |
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99 /** |
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100 * Makes this matrix identity matrix. |
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101 */ |
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102 void Identity(); |
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103 |
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104 /** |
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105 * Multiplies this matrix by rhs matrix. |
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106 * |
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107 * @param rhs Right hand side matrix. |
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108 */ |
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109 void Multiply(const TMatrix& rhs); |
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110 |
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111 /** |
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112 * Sets this matrix to rotation matrix around X-axis. |
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113 * |
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114 * @param aAngle angle in radians. |
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115 */ |
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116 void RotationX(VGfloat aAngle); |
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117 |
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118 /** |
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119 * Sets this matrix to rotation matrix around Y-axis. |
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120 * |
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121 * @param aAngle angle in radians. |
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122 */ |
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123 void RotationY(VGfloat aAngle); |
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124 |
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125 /** |
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126 * Sets this matrix to rotation matrix around Z-axis. |
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127 * |
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128 * @param aAngle angle in radians. |
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129 */ |
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130 void RotationZ(VGfloat aAngle); |
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131 |
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132 /** |
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133 * Sets this matrix to scale matrix. |
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134 * |
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135 * @param aSx scaling on X-axis |
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136 * @param aSy scaling on Y-axis |
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137 * @param aSz scaling on Z-axis |
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138 */ |
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139 void Scale(VGfloat aSx, VGfloat aSy, VGfloat aSz); |
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140 |
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141 /** |
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142 * Sets this matrix to translation matrix. |
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143 * |
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144 * @param aTx translation on X-axis. |
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145 * @param aTy translation on Y-axis. |
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146 * @param aTz translation on Z-axis. |
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147 */ |
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148 void Translation(VGfloat aTx, VGfloat aTy, VGfloat aTz); |
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149 }; |
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150 |
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151 /**-------------------------------------------------------------- |
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152 * IMAGE HANDLING ROUTINES |
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153 --------------------------------------------------------------*/ |
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154 |
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155 /** |
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156 * Creates VGImage from CGuiIcon. |
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157 * May leave for example if runs out of video memory. |
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158 * |
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159 * @param aIcon valid CGuiIcon-object. |
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160 * @return VGImage-object. |
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161 */ |
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162 VGImage CreateVgImageFromIconL( const CGulIcon& aIcon ); |
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163 |
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164 |
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165 /**-------------------------------------------------------------- |
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166 * Misc. Helpers. |
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167 --------------------------------------------------------------*/ |
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168 |
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169 /** |
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170 * Clamps value between lower and upper limits. |
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171 * |
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172 * @param aValue value. |
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173 * @param aUpper upper limit. |
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174 * @param aLower lower limit. |
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175 * @return clamped value. |
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176 */ |
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177 VGfloat Clamp(VGfloat aValue, VGfloat aUpper, VGfloat aLower); |
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178 |
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179 /** |
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180 * Linearly interpolates value between start and end. |
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181 * |
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182 * @param aStart starting value. |
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183 * @param aEnd ending value. |
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184 * @param aT t value between 0.0f - 1.0f. |
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185 */ |
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186 VGfloat Lerp(VGfloat aStart, VGfloat aEnd, VGfloat aT); |
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187 |
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188 /** |
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189 * Gets values absolute. |
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190 * |
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191 * @param aValue value. |
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192 * @return absolute of the value. |
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193 */ |
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194 VGfloat Abs(VGfloat aValue); |
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195 |
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196 |
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197 /** |
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198 * Calculates bounding rect from points. |
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199 * |
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200 * @param aRect destination rect-object, rectangle in symbian screen coordinates. |
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201 * @param aPoints source points in vg coordinates (x, y, x, y...). |
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202 * @param aNumPoints number of points in aPoints. |
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203 */ |
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204 void CalculateBoundingRect(TRect& aRect, VGfloat* aPoints, TInt aNumPoints, |
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205 const TRect& aWindowRect); |
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206 |
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207 |
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208 /** |
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209 * Draws vg image to current vg surface. |
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210 * NOTE: Assumes that the image is in vg coordinates. |
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211 * |
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212 * @param aImage image to draw. |
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213 * @param aPos position where to draw (in symbian screen coordinates). |
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214 * @param aWindowRect drawing windows rectangle. |
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215 */ |
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216 void DrawImage(VGImage aImage, const TPoint& aPos, const TRect& aWindowRect, TBool aCentered = EFalse); |
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217 |
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218 /** |
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219 * Draws vg image to current vg surface multiplying its colors by a color. |
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220 * NOTE: Assumes that the image is in vg coordinates. |
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221 * |
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222 * @param aImage image to draw. |
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223 * @param aColor color which is multiplied with image colors. |
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224 * @param aPos position where the image is drawn (in sumbian screen coordinates) |
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225 * @param aWindowRect drawing windows renctangle. |
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226 */ |
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227 void DrawImageColorized(VGImage aImage, const TRgb& aColor, |
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228 const TPoint& aPos, const TRect& aWindowRect, TBool aCentered = EFalse); |
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229 |
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230 |
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231 /** |
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232 * Wrapper for creating paths. |
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233 * |
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234 * @param aNumSegment |
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235 * @param aSegments |
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236 * @param aPoints |
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237 */ |
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238 VGPath CreatePath(VGuint aNumSegments, const VGubyte* aSegments, const VGfloat* aPoints); |
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239 |
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240 /** |
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241 * Wrapper for creating single color paints. |
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242 * |
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243 * @param aColor |
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244 */ |
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245 VGPaint CreateColorPaint(const TRgb& aColor); |
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246 |
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247 /** |
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248 * Wrapper for creating single color paints. |
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249 * |
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250 * @param aColor |
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251 */ |
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252 VGPaint CreateColorPaint(const VGfloat* aColor); |
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253 |
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254 } |
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255 |
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256 #endif /* HGVGHELPER */ |
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