| 1 | // xImaLyr.cpp : Layers functions
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| 2 | /* 21/04/2003 v1.00 - Davide Pizzolato - www.xdp.it
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| 3 | * CxImage version 6.0.0 02/Feb/2008
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| 4 | */
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| 5 |
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| 6 | #include "ximage.h"
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| 7 |
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| 8 | #if CXIMAGE_SUPPORT_LAYERS
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| 9 |
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| 10 | ////////////////////////////////////////////////////////////////////////////////
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| 11 | /**
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| 12 | * If the object is an internal layer, GetParent return its parent in the hierarchy.
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| 13 | */
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| 14 | CxImage* CxImage::GetParent() const
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| 15 | {
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| 16 | return info.pParent;
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| 17 | }
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| 18 | ////////////////////////////////////////////////////////////////////////////////
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| 19 | /**
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| 20 | * Number of layers allocated directly by the object.
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| 21 | */
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| 22 | long CxImage::GetNumLayers() const
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| 23 | {
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| 24 | return info.nNumLayers;
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| 25 | }
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| 26 | ////////////////////////////////////////////////////////////////////////////////
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| 27 | /**
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| 28 | * Creates an empty layer. If position is less than 0, the new layer will be placed in the last position
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| 29 | */
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| 30 | bool CxImage::LayerCreate(long position)
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| 31 | {
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| 32 | if ( position < 0 || position > info.nNumLayers ) position = info.nNumLayers;
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| 33 |
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| 34 | CxImage** ptmp = new CxImage*[info.nNumLayers + 1];
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| 35 | if (ptmp==0) return false;
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| 36 |
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| 37 | int i=0;
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| 38 | for (int n=0; n<info.nNumLayers; n++){
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| 39 | if (position == n){
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| 40 | ptmp[n] = new CxImage();
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| 41 | i=1;
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| 42 | }
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| 43 | ptmp[n+i]=ppLayers[n];
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| 44 | }
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| 45 | if (i==0) ptmp[info.nNumLayers] = new CxImage();
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| 46 |
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| 47 | if (ptmp[position]){
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| 48 | ptmp[position]->info.pParent = this;
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| 49 | } else {
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| 50 | free(ptmp);
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| 51 | return false;
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| 52 | }
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| 53 |
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| 54 | info.nNumLayers++;
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| 55 | delete [] ppLayers;
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| 56 | ppLayers = ptmp;
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| 57 | return true;
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| 58 | }
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| 59 | ////////////////////////////////////////////////////////////////////////////////
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| 60 | /**
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| 61 | * Deletes a layer. If position is less than 0, the last layer will be deleted
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| 62 | */
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| 63 | bool CxImage::LayerDelete(long position)
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| 64 | {
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| 65 | if ( position >= info.nNumLayers ) return false;
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| 66 | if ( position < 0) position = info.nNumLayers - 1;
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| 67 | if ( position < 0) return false;
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| 68 |
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| 69 | if (info.nNumLayers>1){
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| 70 |
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| 71 | CxImage** ptmp = new CxImage*[info.nNumLayers - 1];
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| 72 | if (ptmp==0) return false;
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| 73 |
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| 74 | int i=0;
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| 75 | for (int n=0; n<info.nNumLayers; n++){
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| 76 | if (position == n){
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| 77 | delete ppLayers[n];
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| 78 | i=1;
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| 79 | }
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| 80 | ptmp[n]=ppLayers[n+i];
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| 81 | }
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| 82 |
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| 83 | info.nNumLayers--;
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| 84 | delete [] ppLayers;
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| 85 | ppLayers = ptmp;
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| 86 |
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| 87 | } else {
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| 88 | delete ppLayers[0];
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| 89 | delete [] ppLayers;
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| 90 | ppLayers = 0;
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| 91 | info.nNumLayers = 0;
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| 92 | }
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| 93 | return true;
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| 94 | }
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| 95 | ////////////////////////////////////////////////////////////////////////////////
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| 96 | void CxImage::LayerDeleteAll()
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| 97 | {
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| 98 | if (ppLayers) {
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| 99 | for(long n=0; n<info.nNumLayers;n++){ delete ppLayers[n]; }
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| 100 | delete [] ppLayers; ppLayers=0; info.nNumLayers = 0;
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| 101 | }
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| 102 | }
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| 103 | ////////////////////////////////////////////////////////////////////////////////
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| 104 | /**
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| 105 | * Returns a pointer to a layer. If position is less than 0, the last layer will be returned
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| 106 | */
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| 107 | CxImage* CxImage::GetLayer(long position)
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| 108 | {
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| 109 | if ( ppLayers == NULL) return NULL;
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| 110 | if ( info.nNumLayers == 0) return NULL;
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| 111 | if ( position >= info.nNumLayers ) return NULL;
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| 112 | if ( position < 0) position = info.nNumLayers - 1;
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| 113 | return ppLayers[position];
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| 114 | }
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| 115 | ////////////////////////////////////////////////////////////////////////////////
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| 116 | #endif //CXIMAGE_SUPPORT_LAYERS
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