Right PDF SDK provides APIs for image creation, conversion, input and output operations. Call ZSImage_LoadFromFile to load an image from a given path, and call ZSImage_Release to end the entire action. Here are some common APIs for image operations listed in Table 3.9. For a complete list of APIs, please refer to ZSImage.h.

Table 3.9

  API Name Description
1 ZSBitmap_Create Create a bitmap.
2 ZSBitmap_ConvertFormat Convert a bitmap to another format.
3 ZSImage_LoadFrame Load an image frame by index.
4 ZSImage_GetCurrentFrameBitmap Retrieve the bitmap of the current frame.
5 ZSImage_NumFrames Count frames of an image.
6 ZSImage_LoadFrame Load an image frame by index.
7 ZSImageFile_Create Create an image file.
8 ZSImageFile_AddFrame Add a frame to image file.

 

This is an example of using bitmap to flip an image.

Example: Load an image, get its size, and flip it using bitmap.

ZSImage image;

ZSImage_LoadFromFile(readFile, &image);

ZSImage_GetSize(image, &width, &height);

 

ZSBitmap srcBitmap, dstBitmap;

ZSImage_LoadFrame(image, 0);

ZSImage_GetCurrentFrameBitmap(image, &srcBitmap);

ZSBitmap_GetFlipped(srcBitmap, ZS_FALSE, ZS_TRUE, &dstBitmap);

 

ZSImageFile imageFile;

ZSImageFile_Create(writeFile, ZS_IMAGETYPE_PNG, 1, &imageFile);

ZSImageFile_AddFrame(imageFile, dstBitmap);

 

ZSImageFile_Release(imageFile);

ZSBitmap_Release(srcBitmap);

ZSBitmap_Release(dstBitmap);

ZSImage_Release(image);

 

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