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scale2x.h File Reference

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Typedefs

typedef unsigned char scale2x_uint8
typedef unsigned short scale2x_uint16
typedef unsigned scale2x_uint32

Functions

void scale2x_8_def (scale2x_uint8 *dst0, scale2x_uint8 *dst1, const scale2x_uint8 *src0, const scale2x_uint8 *src1, const scale2x_uint8 *src2, unsigned count)
 Scale by a factor of 2 a row of pixels of 8 bits.
void scale2x_16_def (scale2x_uint16 *dst0, scale2x_uint16 *dst1, const scale2x_uint16 *src0, const scale2x_uint16 *src1, const scale2x_uint16 *src2, unsigned count)
 Scale by a factor of 2 a row of pixels of 16 bits.
void scale2x_32_def (scale2x_uint32 *dst0, scale2x_uint32 *dst1, const scale2x_uint32 *src0, const scale2x_uint32 *src1, const scale2x_uint32 *src2, unsigned count)
 Scale by a factor of 2 a row of pixels of 32 bits.
void scale2x3_8_def (scale2x_uint8 *dst0, scale2x_uint8 *dst1, scale2x_uint8 *dst2, const scale2x_uint8 *src0, const scale2x_uint8 *src1, const scale2x_uint8 *src2, unsigned count)
 Scale by a factor of 2x3 a row of pixels of 8 bits.
void scale2x3_16_def (scale2x_uint16 *dst0, scale2x_uint16 *dst1, scale2x_uint16 *dst2, const scale2x_uint16 *src0, const scale2x_uint16 *src1, const scale2x_uint16 *src2, unsigned count)
 Scale by a factor of 2x3 a row of pixels of 16 bits.
void scale2x3_32_def (scale2x_uint32 *dst0, scale2x_uint32 *dst1, scale2x_uint32 *dst2, const scale2x_uint32 *src0, const scale2x_uint32 *src1, const scale2x_uint32 *src2, unsigned count)
 Scale by a factor of 2x3 a row of pixels of 32 bits.
void scale2x4_8_def (scale2x_uint8 *dst0, scale2x_uint8 *dst1, scale2x_uint8 *dst2, scale2x_uint8 *dst3, const scale2x_uint8 *src0, const scale2x_uint8 *src1, const scale2x_uint8 *src2, unsigned count)
 Scale by a factor of 2x4 a row of pixels of 8 bits.
void scale2x4_16_def (scale2x_uint16 *dst0, scale2x_uint16 *dst1, scale2x_uint16 *dst2, scale2x_uint16 *dst3, const scale2x_uint16 *src0, const scale2x_uint16 *src1, const scale2x_uint16 *src2, unsigned count)
 Scale by a factor of 2x4 a row of pixels of 16 bits.
void scale2x4_32_def (scale2x_uint32 *dst0, scale2x_uint32 *dst1, scale2x_uint32 *dst2, scale2x_uint32 *dst3, const scale2x_uint32 *src0, const scale2x_uint32 *src1, const scale2x_uint32 *src2, unsigned count)
 Scale by a factor of 2x4 a row of pixels of 32 bits.

Typedef Documentation

typedef unsigned short scale2x_uint16
typedef unsigned scale2x_uint32
typedef unsigned char scale2x_uint8

Function Documentation

void scale2x3_16_def ( scale2x_uint16 dst0,
scale2x_uint16 dst1,
scale2x_uint16 dst2,
const scale2x_uint16 src0,
const scale2x_uint16 src1,
const scale2x_uint16 src2,
unsigned  count 
)

Scale by a factor of 2x3 a row of pixels of 16 bits.

Note:
Like scale2x_16_def();
void scale2x3_32_def ( scale2x_uint32 dst0,
scale2x_uint32 dst1,
scale2x_uint32 dst2,
const scale2x_uint32 src0,
const scale2x_uint32 src1,
const scale2x_uint32 src2,
unsigned  count 
)

Scale by a factor of 2x3 a row of pixels of 32 bits.

Note:
Like scale2x_32_def();
void scale2x3_8_def ( scale2x_uint8 dst0,
scale2x_uint8 dst1,
scale2x_uint8 dst2,
const scale2x_uint8 src0,
const scale2x_uint8 src1,
const scale2x_uint8 src2,
unsigned  count 
)

Scale by a factor of 2x3 a row of pixels of 8 bits.

Note:
Like scale2x_8_def();
void scale2x4_16_def ( scale2x_uint16 dst0,
scale2x_uint16 dst1,
scale2x_uint16 dst2,
scale2x_uint16 dst3,
const scale2x_uint16 src0,
const scale2x_uint16 src1,
const scale2x_uint16 src2,
unsigned  count 
)

Scale by a factor of 2x4 a row of pixels of 16 bits.

Note:
Like scale2x_16_def();
void scale2x4_32_def ( scale2x_uint32 dst0,
scale2x_uint32 dst1,
scale2x_uint32 dst2,
scale2x_uint32 dst3,
const scale2x_uint32 src0,
const scale2x_uint32 src1,
const scale2x_uint32 src2,
unsigned  count 
)

Scale by a factor of 2x4 a row of pixels of 32 bits.

Note:
Like scale2x_32_def();
void scale2x4_8_def ( scale2x_uint8 dst0,
scale2x_uint8 dst1,
scale2x_uint8 dst2,
scale2x_uint8 dst3,
const scale2x_uint8 src0,
const scale2x_uint8 src1,
const scale2x_uint8 src2,
unsigned  count 
)

Scale by a factor of 2x4 a row of pixels of 8 bits.

Note:
Like scale2x_8_def();
void scale2x_16_def ( scale2x_uint16 dst0,
scale2x_uint16 dst1,
const scale2x_uint16 src0,
const scale2x_uint16 src1,
const scale2x_uint16 src2,
unsigned  count 
)

Scale by a factor of 2 a row of pixels of 16 bits.

This function operates like scale2x_8_def() but for 16 bits pixels.

Parameters:
src0Pointer at the first pixel of the previous row.
src1Pointer at the first pixel of the current row.
src2Pointer at the first pixel of the next row.
countLength in pixels of the src0, src1 and src2 rows. It must be at least 2.
dst0First destination row, double length in pixels.
dst1Second destination row, double length in pixels.
void scale2x_32_def ( scale2x_uint32 dst0,
scale2x_uint32 dst1,
const scale2x_uint32 src0,
const scale2x_uint32 src1,
const scale2x_uint32 src2,
unsigned  count 
)

Scale by a factor of 2 a row of pixels of 32 bits.

This function operates like scale2x_8_def() but for 32 bits pixels.

Parameters:
src0Pointer at the first pixel of the previous row.
src1Pointer at the first pixel of the current row.
src2Pointer at the first pixel of the next row.
countLength in pixels of the src0, src1 and src2 rows. It must be at least 2.
dst0First destination row, double length in pixels.
dst1Second destination row, double length in pixels.
void scale2x_8_def ( scale2x_uint8 dst0,
scale2x_uint8 dst1,
const scale2x_uint8 src0,
const scale2x_uint8 src1,
const scale2x_uint8 src2,
unsigned  count 
)

Scale by a factor of 2 a row of pixels of 8 bits.

The function is implemented in C. The pixels over the left and right borders are assumed of the same color of the pixels on the border. Note that the implementation is optimized to write data sequentially to maximize the bandwidth on video memory.

Parameters:
src0Pointer at the first pixel of the previous row.
src1Pointer at the first pixel of the current row.
src2Pointer at the first pixel of the next row.
countLength in pixels of the src0, src1 and src2 rows. It must be at least 2.
dst0First destination row, double length in pixels.
dst1Second destination row, double length in pixels.