author | Tero Marttila <terom@fixme.fi> |
Mon, 25 Jan 2010 04:34:02 +0200 | |
changeset 88 | 5cc2d044d368 |
parent 70 | 35515b3a82b7 |
permissions | -rw-r--r-- |
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d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
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parents:
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1 |
#ifndef PNGTILE_PNG_H |
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parents:
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#define PNGTILE_PNG_H |
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parents:
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3 |
|
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parents:
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4 |
/** |
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parents:
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5 |
* @file |
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parents:
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* PNG-specific handling |
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
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7 |
*/ |
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
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parents:
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#include <png.h> |
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major refactoring of pt_cache, split off all PNG processing into pt_png
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parents:
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9 |
#include <stdint.h> |
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parents:
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10 |
|
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
diff
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11 |
/** |
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
diff
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* Handle sparse data at this granularity (pixels) |
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
diff
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13 |
*/ |
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
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#define PT_IMG_BLOCK_SIZE 64 |
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major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
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|
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
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16 |
/** |
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
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17 |
* PNG img state |
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
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18 |
*/ |
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
diff
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struct pt_png_img { |
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Tero Marttila <terom@fixme.fi>
parents:
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/** libpng state */ |
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Tero Marttila <terom@fixme.fi>
parents:
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png_struct *png; |
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parents:
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png_info *info; |
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Tero Marttila <terom@fixme.fi>
parents:
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|
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1d188aa94aee
pt_png_check, and fclose() pt_image_open_file
Tero Marttila <terom@fixme.fi>
parents:
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/** Possible opened I/O file */ |
1d188aa94aee
pt_png_check, and fclose() pt_image_open_file
Tero Marttila <terom@fixme.fi>
parents:
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FILE *fh; |
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parents:
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26 |
}; |
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parents:
diff
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27 |
|
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
diff
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28 |
/** |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
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29 |
* Cache header layout for PNG-format images |
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
diff
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30 |
*/ |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
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struct pt_png_header { |
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parents:
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/** Pixel dimensions of image */ |
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parents:
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uint32_t width, height; |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
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|
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
diff
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35 |
/** Pixel format */ |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
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uint8_t bit_depth, color_type; |
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Tero Marttila <terom@fixme.fi>
parents:
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|
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
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/** Number of png_color entries that follow */ |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
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uint16_t num_palette; |
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Tero Marttila <terom@fixme.fi>
parents:
diff
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|
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
diff
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/** Number of bytes per row */ |
d5e3089906da
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parents:
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uint32_t row_bytes; |
d5e3089906da
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parents:
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|
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
diff
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/** Number of bytes per pixel */ |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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uint8_t col_bytes; |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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|
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
diff
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|
47 |
/** Palette entries, up to 256 entries used */ |
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parents:
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png_color palette[PNG_MAX_PALETTE_LENGTH]; |
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parents:
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}; |
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parents:
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|
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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|
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Tero Marttila <terom@fixme.fi>
parents:
diff
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#include "image.h" |
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parents:
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#include "tile.h" |
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parents:
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1d188aa94aee
pt_png_check, and fclose() pt_image_open_file
Tero Marttila <terom@fixme.fi>
parents:
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/** |
1d188aa94aee
pt_png_check, and fclose() pt_image_open_file
Tero Marttila <terom@fixme.fi>
parents:
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* Check if the given path looks like a .png file. |
1d188aa94aee
pt_png_check, and fclose() pt_image_open_file
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parents:
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* |
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pt_png_check, and fclose() pt_image_open_file
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* Returns 0 if ok, 1 if non-png file, -1 on error |
1d188aa94aee
pt_png_check, and fclose() pt_image_open_file
Tero Marttila <terom@fixme.fi>
parents:
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59 |
*/ |
1d188aa94aee
pt_png_check, and fclose() pt_image_open_file
Tero Marttila <terom@fixme.fi>
parents:
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int pt_png_check (const char *path); |
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parents:
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|
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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62 |
/** |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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* Open the given .png image, and read info |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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64 |
*/ |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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65 |
int pt_png_open (struct pt_image *image, struct pt_png_img *img); |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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|
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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67 |
/** |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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* Fill in the PNG header and return the size of the pixel data |
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
diff
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|
69 |
*/ |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
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int pt_png_read_header (struct pt_png_img *img, struct pt_png_header *header, size_t *data_size); |
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Tero Marttila <terom@fixme.fi>
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|
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Tero Marttila <terom@fixme.fi>
parents:
diff
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72 |
/** |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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73 |
* Decode the PNG data into the given data segment, using the header as decoded by pt_png_read_header |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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|
74 |
*/ |
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
diff
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int pt_png_decode (struct pt_png_img *img, const struct pt_png_header *header, const struct pt_image_params *params, uint8_t *out); |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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|
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
diff
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77 |
/** |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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78 |
* Fill in img_* fields of pt_image_info from header |
d5e3089906da
major refactoring of pt_cache, split off all PNG processing into pt_png
Tero Marttila <terom@fixme.fi>
parents:
diff
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79 |
*/ |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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int pt_png_info (struct pt_png_header *header, struct pt_image_info *info); |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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|
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
changeset
|
82 |
/** |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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83 |
* Render out a tile |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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|
84 |
*/ |
70 | 85 |
int pt_png_tile (const struct pt_png_header *header, const uint8_t *data, struct pt_tile *tile); |
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Tero Marttila <terom@fixme.fi>
parents:
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|
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Tero Marttila <terom@fixme.fi>
parents:
diff
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87 |
/** |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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88 |
* Release pt_png_ctx resources as allocated by pt_png_open |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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89 |
*/ |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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90 |
void pt_png_release_read (struct pt_png_img *img); |
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Tero Marttila <terom@fixme.fi>
parents:
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91 |
|
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Tero Marttila <terom@fixme.fi>
parents:
diff
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92 |
/** |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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93 |
* Release pt_png_ctx resources as allocated by pt_png_... |
d5e3089906da
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Tero Marttila <terom@fixme.fi>
parents:
diff
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|
94 |
*/ |
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Tero Marttila <terom@fixme.fi>
parents:
diff
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95 |
void pt_png_release_write (struct pt_png_img *img); |
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Tero Marttila <terom@fixme.fi>
parents:
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|
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#endif |