Eet efficiently stores and loads images, including alpha channels and lossy compressions.
Image Store and Load using a Cipher
Most of the Image Store and Load have alternative versions that accounts for ciphers to protect their content.
EAPI int eet_data_image_header_read (Eet_File *ef, const char *name, unsigned int *w, unsigned int *h, int *alpha, int *compress, int *quality, int *lossy)
Read just the header data for an image and dont decode the pixels.
EAPI void * eet_data_image_read (Eet_File *ef, const char *name, unsigned int *w, unsigned int *h, int *alpha, int *compress, int *quality, int *lossy)
Read image data from the named key in the eet file.
EAPI int eet_data_image_read_to_surface (Eet_File *ef, const char *name, unsigned int src_x, unsigned int src_y, unsigned int *d, unsigned int w, unsigned int h, unsigned int row_stride, int *alpha, int *compress, int *quality, int *lossy)
Read image data from the named key in the eet file.
EAPI int eet_data_image_write (Eet_File *ef, const char *name, const void *data, unsigned int w, unsigned int h, int alpha, int compress, int quality, int lossy)
Write image data to the named key in an eet file.
EAPI int eet_data_image_header_decode (const void *data, int size, unsigned int *w, unsigned int *h, int *alpha, int *compress, int *quality, int *lossy)
Decode Image data header only to get information.
EAPI void * eet_data_image_decode (const void *data, int size, unsigned int *w, unsigned int *h, int *alpha, int *compress, int *quality, int *lossy)
Decode Image data into pixel data.
EAPI int eet_data_image_decode_to_surface (const void *data, int size, unsigned int src_x, unsigned int src_y, unsigned int *d, unsigned int w, unsigned int h, unsigned int row_stride, int *alpha, int *compress, int *quality, int *lossy)
Decode Image data into pixel data.
EAPI void * eet_data_image_encode (const void *data, int *size_ret, unsigned int w, unsigned int h, int alpha, int compress, int quality, int lossy)
Encode image data for storage or transmission.
Eet efficiently stores and loads images, including alpha channels and lossy compressions.
Decode Image data into pixel data. Parameters:
Returns:
This function takes encoded pixel data and decodes it into raw RGBA pixels on success.
The other parameters of the image (width, height etc.) are placed into the values pointed to (they must be supplied). The pixel data is a linear array of pixels starting from the top-left of the image scanning row by row from left to right. Each pixel is a 32bit value, with the high byte being the alpha channel, the next being red, then green, and the low byte being blue. The width and height are measured in pixels and will be greater than 0 when returned. The alpha flag is either 0 or 1. 0 denotes that the alpha channel is not used. 1 denotes that it is significant. Compress is filled with the compression value/amount the image was stored with. The quality value is filled with the quality encoding of the image file (0 - 100). The lossy flags is either 0 or 1 as to if the image was encoded lossily or not.
On success the function returns a pointer to the image data decoded. The calling application is responsible for calling free() on the image data when it is done with it. On failure NULL is returned and the parameter values may not contain any sensible data.
See also:
Since:
References eet_data_image_decode_cipher().
Referenced by eet_data_image_read_cipher().
Decode Image data into pixel data. Parameters:
Returns:
This function takes encoded pixel data and decodes it into raw RGBA pixels on success.
The other parameters of the image (alpha, compress etc.) are placed into the values pointed to (they must be supplied). The pixel data is a linear array of pixels starting from the top-left of the image scanning row by row from left to right. Each pixel is a 32bit value, with the high byte being the alpha channel, the next being red, then green, and the low byte being blue. The width and height are measured in pixels and will be greater than 0 when returned. The alpha flag is either 0 or 1. 0 denotes that the alpha channel is not used. 1 denotes that it is significant. Compress is filled with the compression value/amount the image was stored with. The quality value is filled with the quality encoding of the image file (0 - 100). The lossy flags is either 0 or 1 as to if the image was encoded lossily or not.
On success the function returns 1, and 0 on failure. On failure the parameter values may not contain any sensible data.
See also:
Since:
References eet_data_image_decode_to_surface_cipher().
Referenced by eet_data_image_read_to_surface_cipher().
Encode image data for storage or transmission. Parameters:
Returns:
This function stakes image pixel data and encodes it with compression and possible loss of quality (as a trade off for size) for storage or transmission to another system.
The data expected is the same format as returned by eet_data_image_read. If this is not the case weird things may happen. Width and height must be between 1 and 8000 pixels. The alpha flags can be 0 or 1 (0 meaning the alpha values are not useful and 1 meaning they are). Compress can be from 0 to 9 (0 meaning no compression, 9 meaning full compression). This is only used if the image is not lossily encoded. Quality is used on lossy compression and should be a value from 0 to 100. The lossy flag can be 0 or 1. 0 means encode losslessly and 1 means to encode with image quality loss (but then have a much smaller encoding).
On success this function returns a pointer to the encoded data that you can free with free() when no longer needed.
See also:
Since:
References eet_data_image_encode_cipher().
Referenced by eet_data_image_write_cipher().
Decode Image data header only to get information. Parameters:
Returns:
This function takes encoded pixel data and decodes it into raw RGBA pixels on success.
The other parameters of the image (width, height etc.) are placed into the values pointed to (they must be supplied). The pixel data is a linear array of pixels starting from the top-left of the image scanning row by row from left to right. Each pixel is a 32bit value, with the high byte being the alpha channel, the next being red, then green, and the low byte being blue. The width and height are measured in pixels and will be greater than 0 when returned. The alpha flag is either 0 or 1. 0 denotes that the alpha channel is not used. 1 denotes that it is significant. Compress is filled with the compression value/amount the image was stored with. The quality value is filled with the quality encoding of the image file (0 - 100). The lossy flags is either 0 or 1 as to if the image was encoded lossily or not.
On success the function returns 1 indicating the header was read and decoded properly, or 0 on failure.
See also:
Since:
References eet_data_image_header_decode_cipher().
Referenced by eet_data_image_decode_cipher(), eet_data_image_decode_to_surface_cipher(), and eet_data_image_header_read_cipher().
Read just the header data for an image and dont decode the pixels. Parameters:
Returns:
This function reads an image from an eet file stored under the named key in the eet file and return a pointer to the decompressed pixel data.
The other parameters of the image (width, height etc.) are placed into the values pointed to (they must be supplied). The pixel data is a linear array of pixels starting from the top-left of the image scanning row by row from left to right. Each pile is a 32bit value, with the high byte being the alpha channel, the next being red, then green, and the low byte being blue. The width and height are measured in pixels and will be greater than 0 when returned. The alpha flag is either 0 or 1. 0 denotes that the alpha channel is not used. 1 denotes that it is significant. Compress is filled with the compression value/amount the image was stored with. The quality value is filled with the quality encoding of the image file (0 - 100). The lossy flags is either 0 or 1 as to if the image was encoded lossily or not.
On success the function returns 1 indicating the header was read and decoded properly, or 0 on failure.
See also:
Since:
References eet_data_image_header_read_cipher().
Read image data from the named key in the eet file. Parameters:
Returns:
This function reads an image from an eet file stored under the named key in the eet file and return a pointer to the decompressed pixel data.
The other parameters of the image (width, height etc.) are placed into the values pointed to (they must be supplied). The pixel data is a linear array of pixels starting from the top-left of the image scanning row by row from left to right. Each pile is a 32bit value, with the high byte being the alpha channel, the next being red, then green, and the low byte being blue. The width and height are measured in pixels and will be greater than 0 when returned. The alpha flag is either 0 or 1. 0 denotes that the alpha channel is not used. 1 denotes that it is significant. Compress is filled with the compression value/amount the image was stored with. The quality value is filled with the quality encoding of the image file (0 - 100). The lossy flags is either 0 or 1 as to if the image was encoded lossily or not.
On success the function returns a pointer to the image data decoded. The calling application is responsible for calling free() on the image data when it is done with it. On failure NULL is returned and the parameter values may not contain any sensible data.
See also:
Since:
References eet_data_image_read_cipher().
Read image data from the named key in the eet file. Parameters:
Returns:
This function reads an image from an eet file stored under the named key in the eet file and return a pointer to the decompressed pixel data.
The other parameters of the image (width, height etc.) are placed into the values pointed to (they must be supplied). The pixel data is a linear array of pixels starting from the top-left of the image scanning row by row from left to right. Each pile is a 32bit value, with the high byte being the alpha channel, the next being red, then green, and the low byte being blue. The width and height are measured in pixels and will be greater than 0 when returned. The alpha flag is either 0 or 1. 0 denotes that the alpha channel is not used. 1 denotes that it is significant. Compress is filled with the compression value/amount the image was stored with. The quality value is filled with the quality encoding of the image file (0 - 100). The lossy flags is either 0 or 1 as to if the image was encoded lossily or not.
On success the function returns 1, and 0 on failure. On failure the parameter values may not contain any sensible data.
See also:
Since:
References eet_data_image_read_to_surface_cipher().
Write image data to the named key in an eet file. Parameters:
Returns:
This function takes image pixel data and encodes it in an eet file stored under the supplied name key, and returns how many bytes were actually written to encode the image data.
The data expected is the same format as returned by eet_data_image_read. If this is not the case weird things may happen. Width and height must be between 1 and 8000 pixels. The alpha flags can be 0 or 1 (0 meaning the alpha values are not useful and 1 meaning they are). Compress can be from 0 to 9 (0 meaning no compression, 9 meaning full compression). This is only used if the image is not lossily encoded. Quality is used on lossy compression and should be a value from 0 to 100. The lossy flag can be 0 or 1. 0 means encode losslessly and 1 means to encode with image quality loss (but then have a much smaller encoding).
On success this function returns the number of bytes that were required to encode the image data, or on failure it returns 0.
See also:
Since:
References eet_data_image_write_cipher().
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