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1 // Copyright (c) 1997-2009 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 #include <hal.h> |
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17 #include "scdraw.h" |
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18 |
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19 /** |
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20 Constructs the CDrawScreenBitmap object. |
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21 @param aScreenNo Screen number. It will be used in HAL::Get() calls. |
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22 @param aBitmapAddress The screen memory address. |
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23 @param aSize Screen size |
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24 @return System-wide error codes, KErrNone if the construction was successfull. |
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25 */ |
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26 TInt CDrawScreenBitmap::ConstructScreen(TInt aScreenNo, TAny* aBitmapAddress,TSize aSize) |
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27 { |
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28 iScreenNo = aScreenNo; |
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29 TInt ret = SCREEN_LAYOUT_BASE_BITMAP::Construct(aSize); |
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30 if (ret != KErrNone) |
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31 return ret; |
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32 |
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33 //fixup for emulating smaller screen |
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34 TInt offset = 0; |
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35 // get the offset in bytes |
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36 ret = HAL::Get(iScreenNo, HALData::EDisplayOffsetBetweenLines, offset); |
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37 |
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38 TInt bitsPerPixel = BitsPerPixel(iDispMode); |
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39 TInt bytesPerPixel = (bitsPerPixel/8 + (bitsPerPixel % 8 ? 1 : 0)); |
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40 |
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41 if (ret == KErrNone ) |
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42 { |
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43 // Find iLongwidth (in pixels) from the offset (in bytes). |
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44 if (bitsPerPixel >= 8) |
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45 { |
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46 // a pixel fits in 1 or more bytes |
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47 iLongWidth = offset / bytesPerPixel; |
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48 } |
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49 else |
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50 { |
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51 // 1 or more pixels per byte |
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52 TInt pixelsPerByte = 8 / bitsPerPixel; |
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53 iLongWidth = offset * pixelsPerByte; |
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54 } |
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55 iScanLineWords = offset / 4; |
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56 |
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57 // correct the size of the ScanLineBuffer |
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58 User::Heap().Free(iScanLineBuffer); |
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59 iScanLineBuffer = (TUint32*)(User::Heap().Alloc(offset)); |
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60 if(iScanLineBuffer == NULL) |
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61 return KErrNoMemory; |
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62 } |
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63 else |
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64 { |
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65 return ret; |
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66 } |
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67 //fixup for emulating smaller screen |
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68 |
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69 offset = 0; // Pass in display mode |
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70 ret = HAL::Get(iScreenNo, HALData::EDisplayOffsetToFirstPixel,offset); |
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71 iBits = (TUint32*)aBitmapAddress; |
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72 iBits += offset / sizeof(TUint32); |
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73 return ret; |
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74 } |
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75 |
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76 void CDrawScreenBitmap::SetDisplayMode(CFbsDrawDevice* aDrawDevice) |
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77 { |
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78 CopyOldSettings(aDrawDevice); |
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79 } |
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80 |
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81 void CDrawScreenBitmap::OrientationsAvailable(TBool aOrientation[4]) |
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82 { |
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83 aOrientation[EOrientationNormal] = ETrue; |
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84 aOrientation[EOrientationRotated90] = ETrue; |
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85 aOrientation[EOrientationRotated180] = ETrue; |
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86 aOrientation[EOrientationRotated270] = ETrue; |
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87 } |
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88 |
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89 TBool CDrawScreenBitmap::SetOrientation(TOrientation aOrientation) |
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90 { |
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91 iOrientation = aOrientation; |
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92 return ETrue; |
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93 } |
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94 |
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95 TInt CDrawScreenBitmap::HorzTwipsPerThousandPixels() const |
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96 { |
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97 if (iSize.iWidth == 0) |
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98 return 0; |
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99 |
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100 TInt twips = 0; |
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101 HAL::Get(iScreenNo, HALData::EDisplayXTwips,twips); |
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102 |
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103 return twips * 1000 / iSize.iWidth; // iSize gets iWidth and iHeight swapped by changing the orientation so always use iWidth |
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104 } |
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105 |
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106 TInt CDrawScreenBitmap::VertTwipsPerThousandPixels() const |
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107 { |
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108 if (iSize.iHeight == 0) |
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109 return 0; |
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110 |
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111 TInt twips = 0; |
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112 HAL::Get(iScreenNo, HALData::EDisplayYTwips,twips); |
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113 |
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114 return twips * 1000 / iSize.iHeight; |
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115 } |
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116 |