1 // Copyright (c) 2005-2009 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 // Contains client-side shaper functionality. |
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15 // |
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16 // |
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17 |
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18 #include "ShapeImpl.h" |
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19 #include "ShapeInfo.h" |
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20 #include <gdi.h> |
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21 #include "GDIPANIC.h" |
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22 |
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23 GLREF_C void Panic(TInt aError); |
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24 |
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25 /** Construct an RShapeInfo. */ |
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26 /** @internalComponent */ |
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27 EXPORT_C RShapeInfo::RShapeInfo() |
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28 : iFont(0), iHeader(0), iEndOfShapedText(-1), iContextualProcessFunc(0) {} |
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29 |
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30 /** Perform shaping on the text in aText between aStartOfTextToShape and |
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31 aEndOfTextToShape, based on the script conventions implied by aScriptCode. |
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32 @param aFont The font to use for the shaping. |
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33 @param aText The text, including context. |
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34 @param aStartOfTextToShape |
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35 The start position within aText of the text to be shaped. |
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36 @param aEndOfTextToShape |
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37 The end position within aText of the text to be shaped. |
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38 @param aScriptCode The script code for the script being shaped. |
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39 @param aLanguageCode The language code for the language being shaped. |
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40 @return |
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41 KErrNone if the text was successfully shaped, KErrNotSupported if aFont has |
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42 no shaper, KErrCouldNotConnect if the font bitmap server has not been |
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43 started. |
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44 */ |
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45 TInt RShapeInfo::Open(const CFont* aFont, const TDesC& aText, |
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46 TInt aStartOfTextToShape, TInt aEndOfTextToShape, |
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47 TInt aScriptCode, TInt aLanguageCode) |
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48 { |
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49 GDI_ASSERT_DEBUG(0 <= aStartOfTextToShape, |
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50 EGdiPanic_InvalidInputParam); |
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51 GDI_ASSERT_DEBUG(aStartOfTextToShape <= aEndOfTextToShape, |
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52 EGdiPanic_InvalidInputParam); |
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53 GDI_ASSERT_DEBUG(aEndOfTextToShape <= aText.Length(), |
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54 EGdiPanic_InvalidInputParam); |
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55 iFont = aFont; |
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56 TFontShapeFunctionParameters param; |
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57 param.iText = &aText; |
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58 param.iStart = aStartOfTextToShape; |
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59 param.iEnd = aEndOfTextToShape; |
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60 param.iScript = aScriptCode; |
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61 param.iLanguage = aLanguageCode; |
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62 const TInt r = aFont->ExtendedFunction(KFontGetShaping, ¶m); |
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63 iHeader = r == KErrNone ? param.iShapeHeaderOutput : 0; |
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64 if(iHeader) |
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65 iEndOfShapedText = aEndOfTextToShape; |
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66 return r; |
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67 } |
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68 |
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69 /** Frees the memory associated with this shaping information. */ |
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70 /** @internalComponent */ |
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71 EXPORT_C void RShapeInfo::Close() |
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72 { |
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73 if (iHeader) |
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74 { |
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75 TFontShapeDeleteFunctionParameters param; |
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76 param.iShapeHeader = iHeader; |
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77 iFont->ExtendedFunction(KFontDeleteShaping, ¶m); |
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78 iHeader = NULL; |
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79 iEndOfShapedText = -1; |
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80 // We don't reset iSingleContextChar because we want the context to remain throughout, |
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81 // even when the session is closed. It would eventually simply go out of scope. |
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82 } |
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83 } |
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84 |
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85 /** Returns the number of glyphs in the shaped output. |
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86 @return The number of glyphs. Also equal to the size of the Glyphs() array and |
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87 the GlyphPositions() array. */ |
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88 TInt RShapeInfo::GlyphCount() const |
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89 { |
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90 GDI_ASSERT_ALWAYS(iHeader, EGdiPanic_Invariant); |
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91 return iHeader->iGlyphCount; |
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92 } |
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93 |
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94 /** Returns the array of glyphs. These must be ORed with 0x80000000 to make |
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95 glyph numbers that functions like CFbsFont::Rasterize can accept to avoid |
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96 confusing glyph numbers with Unicode character numbers. |
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97 @return The glyph array. The size of this array is RShapeInfo::GlyphCount |
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98 @see GlyphCount */ |
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99 const TInt32* RShapeInfo::Glyphs() const |
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100 { |
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101 GDI_ASSERT_ALWAYS(iHeader, EGdiPanic_Invariant); |
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102 return reinterpret_cast<const TInt32*>(iHeader->iBuffer); |
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103 } |
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104 |
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105 /** Returns the array of positions for the glyphs returned by Glyphs, and the |
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106 total advance for the text. |
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107 @return |
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108 Array of glyph positions in pixels, relative to the pen position before |
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109 the glyphs are drawn. The array has GlyphCount() + 1 entries, as the |
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110 last entry represents the total advance of the text. */ |
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111 const RShapeInfo::TPoint16* RShapeInfo::GlyphPositions() const |
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112 { |
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113 GDI_ASSERT_ALWAYS(iHeader, EGdiPanic_Invariant); |
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114 return reinterpret_cast<const RShapeInfo::TPoint16*>(iHeader->iBuffer |
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115 + ((iHeader->iGlyphCount) << 2)); |
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116 } |
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117 |
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118 /** Returns the pen advance these glyphs require. |
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119 @return The pen advance; where to move the pen after drawing all the glyphs. */ |
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120 RShapeInfo::TPoint16 RShapeInfo::Advance() const |
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121 { |
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122 GDI_ASSERT_ALWAYS(iHeader, EGdiPanic_Invariant); |
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123 RShapeInfo::TPoint16 r; |
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124 r.iX = *reinterpret_cast<const TInt16*>(iHeader->iBuffer |
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125 + (iHeader->iGlyphCount << 3)); |
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126 r.iY = *reinterpret_cast<const TInt16*>(iHeader->iBuffer |
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127 + (iHeader->iGlyphCount << 3) + 2); |
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128 return r; |
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129 } |
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130 |
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131 /** Returns the array of indices. |
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132 @return |
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133 Indices[n] is the position in the input text that produced Glyphs[n]. |
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134 */ |
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135 const TInt16* RShapeInfo::Indices() const |
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136 { |
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137 GDI_ASSERT_ALWAYS(iHeader, EGdiPanic_Invariant); |
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138 return reinterpret_cast<const TInt16*>(iHeader->iBuffer |
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139 + (iHeader->iGlyphCount << 3) + 4); |
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140 } |
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141 |
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142 TInt RShapeInfo::EndOfShapedText() |
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143 { |
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144 return iEndOfShapedText; |
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145 } |
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146 |
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147 /** Checks if this shaping information is still occupying memory. */ |
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148 EXPORT_C TBool RShapeInfo::IsOpen() |
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149 { |
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150 if(iHeader && iHeader->iGlyphCount >= 0 && iHeader->iCharacterCount >=0) |
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151 return ETrue; |
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152 else |
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153 return EFalse; |
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154 |
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155 } |
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156 |
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157 void RShapeInfo::SetContext(TAny* aContextualProcessFunc) |
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158 { |
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159 iContextualProcessFunc = aContextualProcessFunc; |
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160 } |
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161 |
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162 TAny* RShapeInfo::GetContext() |
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163 { |
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164 return iContextualProcessFunc; |
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165 } |
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166 |
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