equal
deleted
inserted
replaced
54 /** Number of png_color entries that follow */ |
54 /** Number of png_color entries that follow */ |
55 uint16_t num_palette; |
55 uint16_t num_palette; |
56 |
56 |
57 /** Convenience field for number of bytes per row */ |
57 /** Convenience field for number of bytes per row */ |
58 uint32_t row_bytes; |
58 uint32_t row_bytes; |
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59 |
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60 /** Number of bytes per pixel */ |
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61 uint8_t col_bytes; |
59 |
62 |
60 /** Palette entries, up to 256 entries used */ |
63 /** Palette entries, up to 256 entries used */ |
61 png_color palette[PNG_MAX_PALETTE_LENGTH]; |
64 png_color palette[PNG_MAX_PALETTE_LENGTH]; |
62 }; |
65 }; |
63 |
66 |
64 /** |
67 /** |
65 * Construct the image cache info object associated with the given image. |
68 * Construct the image cache info object associated with the given image. |
66 */ |
69 */ |
67 int pt_cache_open (struct pt_cache **cache_ptr, const char *path, int mode); |
70 int pt_cache_new (struct pt_cache **cache_ptr, const char *path, int mode); |
68 |
71 |
69 /** |
72 /** |
70 * Verify if the cached data eixsts, or has become stale compared to the given original file. |
73 * Verify if the cached data eixsts, or has become stale compared to the given original file. |
71 * |
74 * |
72 * @return one of pt_cache_status; <0 on error, 0 if fresh, >0 otherwise |
75 * @return one of pt_cache_status; <0 on error, 0 if fresh, >0 otherwise |
77 * Update the cache data from the given PNG image. |
80 * Update the cache data from the given PNG image. |
78 */ |
81 */ |
79 int pt_cache_update_png (struct pt_cache *cache, png_structp png, png_infop info); |
82 int pt_cache_update_png (struct pt_cache *cache, png_structp png, png_infop info); |
80 |
83 |
81 /** |
84 /** |
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85 * Actually open the existing .cache for use |
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86 */ |
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87 int pt_cache_open (struct pt_cache *cache); |
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88 |
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89 /** |
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90 * Render out a PNG tile as given, into the established png object, up to (but not including) the png_write_end. |
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91 * |
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92 * If the cache is not yet open, this will open it |
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93 */ |
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94 int pt_cache_tile_png (struct pt_cache *cache, png_structp png, png_infop info, const struct pt_tile_info *ti); |
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95 |
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96 /** |
82 * Release all resources associated with the given cache object without any cleanup. |
97 * Release all resources associated with the given cache object without any cleanup. |
83 */ |
98 */ |
84 void pt_cache_destroy (struct pt_cache *cache); |
99 void pt_cache_destroy (struct pt_cache *cache); |
85 |
100 |
86 #endif |
101 #endif |