Spatial Expansion

Perform 2x spatial expansion (upscaling). More...

Functions
int	rapp_expand_1x2_bin (uint8_t *restrict dst, int dst_dim, const uint8_t *restrict src, int src_dim, int width, int height)
	Binary 1x2 expansion.
int	rapp_expand_2x1_bin (uint8_t *restrict dst, int dst_dim, const uint8_t *restrict src, int src_dim, int width, int height)
	Binary 2x1 expansion.
int	rapp_expand_2x2_bin (uint8_t *restrict dst, int dst_dim, const uint8_t *restrict src, int src_dim, int width, int height)
	Binary 2x2 expansion.

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Detailed Description

Perform 2x spatial expansion (upscaling).

The images must be aligned.

Next section: Rotations

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Function Documentation

int rapp_expand_1x2_bin	(	uint8_t *restrict	dst,
		int	dst_dim,
		const uint8_t *restrict	src,
		int	src_dim,
		int	width,
		int	height
	)

Binary 1x2 expansion.

Upscaling to double size in horizontal direction using pixel replication. The size of the expanded image is 2*width, height.

Parameters:

[out]	dst	Destination pixel buffer.
	dst_dim	Row dimension of the destination buffer.
[in]	src	Source pixel buffer.
	src_dim	Row dimension of the source buffer.
	width	Source image width in pixels.
	height	Image height in pixels.

Returns:

A negative error code on error, zero otherwise.

int rapp_expand_2x1_bin	(	uint8_t *restrict	dst,
		int	dst_dim,
		const uint8_t *restrict	src,
		int	src_dim,
		int	width,
		int	height
	)

Binary 2x1 expansion.

Upscaling to double size in vertical direction using pixel replication. The size of the expanded image is width, 2*height.

Parameters:

[out]	dst	Destination pixel buffer.
	dst_dim	Row dimension of the destination buffer.
[in]	src	Source pixel buffer.
	src_dim	Row dimension of the source buffer.
	width	Image width in pixels.
	height	Source image height in pixels.

Returns:

A negative error code on error, zero otherwise.

int rapp_expand_2x2_bin	(	uint8_t *restrict	dst,
		int	dst_dim,
		const uint8_t *restrict	src,
		int	src_dim,
		int	width,
		int	height
	)

Binary 2x2 expansion.

Upscaling to double size using pixel replication. The size of the expanded image is 2*width, 2*height.

Parameters:

[out]	dst	Destination pixel buffer.
	dst_dim	Row dimension of the destination buffer.
[in]	src	Source pixel buffer.
	src_dim	Row dimension of the source buffer.
	width	Source image width in pixels.
	height	Source image height in pixels.

Returns:

A negative error code on error, zero otherwise.