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enum | {
IMAGE_TRANSLATE_FROM_MONO = 1,
IMAGE_TRANSLATE_FROM_GRAY_8 = 2,
IMAGE_TRANSLATE_FROM_GRAY_16 = 3,
IMAGE_TRANSLATE_FROM_COLOUR_8 = 4,
IMAGE_TRANSLATE_FROM_COLOUR_16 = 5
} |
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◆ image_translate_free()
Free the resources associated with an image translation context.
- Parameters
-
s | The image translation context. |
- Returns
- 0 for success, otherwise -1.
References image_translate_release().
◆ image_translate_get_output_length()
Get the length of the image being produced by an image translation context.
- Parameters
-
s | The image translation context. |
- Returns
- The length of the output image, in pixel.
◆ image_translate_get_output_width()
Get the width of the image being produced by an image translation context.
- Parameters
-
s | The image translation context. |
- Returns
- The width of the output image, in pixel.
◆ image_translate_init()
Initialise an image translation context for rescaling and squashing a gray scale or colour image to a bi-level FAX type image.
- Parameters
-
s | The image translation context. |
input_format | x |
input_width | The width of the source image, in pixels. |
input_length | The length of the source image, in pixels. |
output_width | The width of the output image, in pixels. The length of the output image will be derived automatically from this and the source image dimension, to main the geometry of the original image. |
row_read_handler | A callback routine used to pull rows of pixels from the source image into the translation process. |
row_read_user_data | An opaque point passed to read_row_handler |
- Returns
- A pointer to the context, or NULL if there was a problem.
◆ image_translate_release()
Release the resources associated with an image translation context.
- Parameters
-
s | The image translation context. |
- Returns
- 0 for success, otherwise -1.
Referenced by image_translate_free().
◆ image_translate_row()
Get the next row of a translated image.
- Parameters
-
s | The image translation context. |
- Returns
- the length of the row buffer, in bytes