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38 lines
1.2 KiB
C
38 lines
1.2 KiB
C
#pragma once
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#ifndef PNG_IO_H
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#define PNG_IO_H
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// #include "MMBitmap_c.h"
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// #include "io_c.h"
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enum _PNGReadError {
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kPNGGenericError = 0,
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kPNGReadError,
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kPNGAccessError,
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kPNGInvalidHeaderError
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};
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typedef MMIOError MMPNGReadError;
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/* Returns description of given MMPNGReadError.
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* Returned string is constant and hence should not be freed. */
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const char *MMPNGReadErrorString(MMIOError error);
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/* Attempts to read PNG file at path; returns new MMBitmap on success, or
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* NULL on error. If |error| is non-NULL, it will be set to the error code
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* on return.
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* Responsibility for destroy()'ing returned MMBitmap is left up to caller. */
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MMBitmapRef newMMBitmapFromPNG(const char *path, MMPNGReadError *error);
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/* Attempts to write PNG at path; returns 0 on success, -1 on error. */
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int saveMMBitmapAsPNG(MMBitmapRef bitmap, const char *path);
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/* Returns a buffer containing the raw PNG file data, ready to be saved to a
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* file. |len| will be set to the number of bytes allocated in the returned
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* buffer (it cannot be NULL).
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*
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* Responsibility for free()'ing data is left up to the caller. */
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uint8_t *createPNGData(MMBitmapRef bitmap, size_t *len);
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#endif /* PNG_IO_H */
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