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46 lines
784 B
C
46 lines
784 B
C
#pragma once
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#define PNG_DEBUG 3
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#include <png.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <unistd.h>
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enum png_status {
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PNG_STATUS_NONE = 0,
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PNG_STATUS_DECODE_READY,
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PNG_STATUS_ENCODE_READY,
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PNG_STATUS_ERROR,
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PNG_STATUS_DONE,
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};
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struct png_ctx {
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FILE *file_obj;
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png_structp png_ptr;
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png_infop info_ptr;
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enum png_status status;
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uint32_t width;
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uint32_t height;
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size_t row_stride;
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uint8_t format;
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uint32_t last_decoded_row;
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};
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bool
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png_decoder_init_from_filename (struct png_ctx *self,
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const char *filename);
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void
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png_clear (struct png_ctx *self);
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ssize_t
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png_read (struct png_ctx *self,
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void *buffer,
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size_t size,
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size_t *first_row,
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size_t *num_rows);
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