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#ifndef PNGTILE_H
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#define PNGTILE_H
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/**
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* @file
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*
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* Tile-based access to large PNG images.
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*/
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/**
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* "Global" context shared between images
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*/
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struct pt_ctx;
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/**
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* Per-image state
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*/
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struct pt_image;
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enum pt_image_mode {
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PT_IMG_READ = 0x01,
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PT_IMG_WRITE = 0x02,
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};
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int pt_ctx_new (struct pt_ctx **ctx_ptr);
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/**
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* Open a new pt_image for use.
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*
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* @param img_ptr returned pt_image handle
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* @param ctx global state to use
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* @param path filesystem path to .png file
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* @param mode combination of PT_IMG_* flags
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*/
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int pt_image_open (struct pt_image **img_ptr, struct pt_ctx *ctx, const char *png_path, int cache_mode);
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#endif
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