There are two ImageGear functions for pasting the image from the clipboard:
- IG_clipboard_paste() creates a new HIGEAR image into which it pastes the contents of the clipboard.
- IG_clipboard_paste_merge_ex() pastes the clipboard image into an existing HIGEAR image at the specified position. If the clipboard image's width is greater than the image into which it is being pasted, it will automatically be cropped to fit; the size of the original HIGEAR image will not change.
Before you call IG_clipboard_paste_merge_ex(), you can call the function IG_clipboard_paste_op_set() to specify the kind of arithmetic operation you want to apply to the pixels of the two bitmaps that intersect during the paste-merge. IG_clipboard_paste_op_set() takes an AT_MODE constant (defined in accucnst.h) that has a prefix of IG_ARITH_. The full group of arithmetic constants is listed under the function description for IG_clipboard_paste_op_set(). ImageGear also supplies a companion reading function IG_clipboard_paste_op_get() to read the current setting for the paste-merge arithmetic operation. See Example code below:
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AT_DIMENSION nWi, nHi; UINT nBpp; BOOL bPasteAvail; AT_ERRCOUNT nErrcount; HIGEAR hIGear, hIGear2; AT_RECT rcClipRect; nErrcount = IG_load_file("picture.bmp", &hIGear); if (nErrcount == 0) { nErrcount = IG_image_dimensions_get ( hIGear, &nWid, &nHi, &nBpp );*/ if ( nErrcount == 0 ) /* If valid image dimensions */ {/* send the bottom half of the image*/ rcClipRect.top = nHi/2; /* to the clipboard */ rcClipRect.left = 0; rcClipRect.right = nWi - 1; rcClipRect.bottom = nHi - 1; nErrcount = IG_clipboard_copy (hIGear, &rcClipRect); } if (nErrcount == 0) { /*load a second image into which to merge the clipboard contents*/ nErrcount = IG_load_file("picture2.bmp", &hIGear2); } if (nErrcount == 0) { nErrcount = IG_clipboard_paste_available_ex(&bPasteAvail); if (bPasteAvail == TRUE) { /* set the paste-merge arithmetic operation to Img1^Img2 */ nErrcount = IG_clipboard_paste_op_set(hIGear, IG_ARITH_XOR); /* merge clipboard's rectangular contents with upper left corner at position 0,0 */ nErrcount = IG_clipboard_paste_merge_ex(hIGear2, 0 , 0); } } |
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