Right PDF SDK provides APIs to edit PDF objects, including text, images, and path. Call the function ZSPage_AcquireEContent initially to get the page objects before using other functions to edit page objects. Here are some common APIs for editing listed in Table 3.6. For a complete list of APIs, please refer to ZSEdit.h.

Table 3.6

  API Name Description
1 ZSPage_AcquireEContent Acquire page content in a PDF page.
2 ZSEContent_NumObjects Receive the total count of ZSEObject in content.
3 ZSEObject_GetType Receive the type of pageObj.
4 ZSEObject_GetColor Get the color of pageObj.
5 ZSTextObject_HasTransparency Define whether pageObj is transparent.
6 ZSImageObject_CloneBitmap Clone a bitmap from an image object.
7 ZSEObject_AddClipObject Get an object from a clip in pageObj.
8 ZSPathData_Create Create new path data.
9 ZSPathData_GetSegment Get specific segment from the path data.

 

This is an example of editing text, images, and path of a page.

Example: Text, image, and path edit

ZSEContent content;
ZSPage_AcquireEContent(page, &content);

//text
ZSEObject textObj;
ZSTextObject_Create(&textObj);

// set custom font and text state
ZSTextObject_AddUnicodeString(textObj, 0, &textState, &text);
ZSEContent_InsertObject(content, 0, textObj);
ZSEObject_Release(textobj);

//image
ZSEObject imageObj;
ZSImageObject_CreateFromFileName(&filename, 0, &imageObj);
ZSEContent_InsertObject(content, 1, imageObj);
ZSEObject_Release(imageObj);

//path
ZSEObject pathObj;
ZSPathObject_Create(&pathObj);

//set custom path data
ZSPathObject_SetPathData(pathObj, pathData);
ZSPathObject_SetStrokeState(pathObj, ZS_TRUE);
ZSEContent_InsertObject(content, 2, pathObj);
ZSEObject_Release(pathObj);

ZSPage_SetEContent(page);

 

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