#include <math.h>
#include "BLI_math_color.h"
#include "BLI_math_interp.h"
#include "BLI_utildefines.h"
#include "MEM_guardedalloc.h"
#include "IMB_imbuf.h"
#include "IMB_imbuf_types.h"
#include "imbuf.h"
#include "IMB_filter.h"
#include "BLI_sys_types.h"

Classes
struct	scale_outpix_byte

struct	scale_outpix_float

struct	imbufRGBA

struct	ScaleTreadInitData

struct	ScaleThreadData

Typedefs
typedef struct ScaleTreadInitData	ScaleTreadInitData

typedef struct ScaleThreadData	ScaleThreadData

Functions
static void	imb_half_x_no_alloc (struct ImBuf ibuf2, struct ImBuf ibuf1)

struct ImBuf *	IMB_half_x (struct ImBuf *ibuf1)

struct ImBuf *	IMB_double_fast_x (struct ImBuf *ibuf1)

struct ImBuf *	IMB_double_x (struct ImBuf *ibuf1)

static void	imb_half_y_no_alloc (struct ImBuf ibuf2, struct ImBuf ibuf1)

struct ImBuf *	IMB_half_y (struct ImBuf *ibuf1)

struct ImBuf *	IMB_double_fast_y (struct ImBuf *ibuf1)

struct ImBuf *	IMB_double_y (struct ImBuf *ibuf1)

MINLINE void	straight_uchar_to_premul_ushort (unsigned short result[4], const unsigned char color[4])

MINLINE void	premul_ushort_to_straight_uchar (unsigned char *result, const unsigned short color[4])

void	imb_onehalf_no_alloc (struct ImBuf ibuf2, struct ImBuf ibuf1)

ImBuf *	IMB_onehalf (struct ImBuf *ibuf1)

static void	enlarge_picture_byte (unsigned char src, unsigned char dst, int src_width, int src_height, int dst_width, int dst_height)

static void	shrink_picture_byte (unsigned char src, unsigned char dst, int src_width, int src_height, int dst_width, int dst_height)

static void	q_scale_byte (unsigned char in, unsigned char out, int in_width, int in_height, int dst_width, int dst_height)

static void	enlarge_picture_float (float src, float dst, int src_width, int src_height, int dst_width, int dst_height)

static void	shrink_picture_float (const float src, float dst, int src_width, int src_height, int dst_width, int dst_height)

static void	q_scale_float (float in, float out, int in_width, int in_height, int dst_width, int dst_height)

static bool	q_scale_linear_interpolation (struct ImBuf *ibuf, int newx, int newy)

static ImBuf *	scaledownx (struct ImBuf *ibuf, int newx)

static ImBuf *	scaledowny (struct ImBuf *ibuf, int newy)

static ImBuf *	scaleupx (struct ImBuf *ibuf, int newx)

static ImBuf *	scaleupy (struct ImBuf *ibuf, int newy)

static void	scalefast_Z_ImBuf (ImBuf *ibuf, int newx, int newy)

bool	IMB_scaleImBuf (struct ImBuf *ibuf, unsigned int newx, unsigned int newy)

bool	IMB_scalefastImBuf (struct ImBuf *ibuf, unsigned int newx, unsigned int newy)

static void	scale_thread_init (void data_v, int start_line, int tot_line, void init_data_v)

static void *	do_scale_thread (void *data_v)

void	IMB_scaleImBuf_threaded (ImBuf *ibuf, unsigned int newx, unsigned int newy)

Typedef Documentation

◆ ScaleThreadData

typedef struct ScaleThreadData ScaleThreadData

◆ ScaleTreadInitData

typedef struct ScaleTreadInitData ScaleTreadInitData

Function Documentation

◆ do_scale_thread()

static void* do_scale_thread ( void * data_v )

static

Definition at line 1855 of file scaling.c.

References BLI_bilinear_interpolation_char(), BLI_bilinear_interpolation_fl(), ImBuf::channels, data, float(), NULL, ImBuf::rect, ImBuf::rect_float, v, x, ImBuf::x, y, and ImBuf::y.

Referenced by IMB_scaleImBuf_threaded().

◆ enlarge_picture_byte()

static void enlarge_picture_byte	(	unsigned char *	src,
		unsigned char *	dst,
		int	src_width,
		int	src_height,
		int	dst_width,
		int	dst_height
	)

static

Definition at line 483 of file scaling.c.

References double(), and x.

Referenced by q_scale_byte().

◆ enlarge_picture_float()

static void enlarge_picture_float	(	float *	src,
		float *	dst,
		int	src_width,
		int	src_height,
		int	dst_width,
		int	dst_height
	)

static

Definition at line 681 of file scaling.c.

References double(), float(), and x.

Referenced by q_scale_float().

◆ IMB_double_fast_x()

struct ImBuf* IMB_double_fast_x ( struct ImBuf * ibuf1 )

Attention: defined in scaling.c

Definition at line 124 of file scaling.c.

References col, ImBuf::flags, IMB_allocImBuf(), NULL, ImBuf::planes, ImBuf::rect, ImBuf::rect_float, ImBuf::x, and ImBuf::y.

Referenced by IMB_double_x().

◆ IMB_double_fast_y()

struct ImBuf* IMB_double_fast_y ( struct ImBuf * ibuf1 )

Attention: defined in scaling.c

Definition at line 278 of file scaling.c.

References ImBuf::flags, IMB_allocImBuf(), NULL, ImBuf::planes, ImBuf::rect, ImBuf::rect_float, x, ImBuf::x, y, and ImBuf::y.

Referenced by IMB_double_y().

◆ IMB_double_x()

struct ImBuf* IMB_double_x ( struct ImBuf * ibuf1 )

Attention: defined in scaling.c

Definition at line 169 of file scaling.c.

References IMB_double_fast_x(), imb_filterx(), NULL, ImBuf::rect, and ImBuf::rect_float.

◆ IMB_double_y()

struct ImBuf* IMB_double_y ( struct ImBuf * ibuf1 )

Attention: defined in scaling.c

Definition at line 326 of file scaling.c.

References IMB_double_fast_y(), IMB_filtery(), NULL, and ImBuf::rect.

◆ IMB_half_x()

struct ImBuf* IMB_half_x ( struct ImBuf * ibuf1 )

Attention: defined in scaling.c

Definition at line 99 of file scaling.c.

References ImBuf::flags, IMB_allocImBuf(), IMB_dupImBuf(), imb_half_x_no_alloc(), NULL, ImBuf::planes, ImBuf::rect, ImBuf::rect_float, ImBuf::x, and ImBuf::y.

Referenced by IMB_onehalf().

◆ imb_half_x_no_alloc()

static void imb_half_x_no_alloc	(	struct ImBuf *	ibuf2,
		struct ImBuf *	ibuf1
	)

static

Definition at line 40 of file scaling.c.

References Freestyle::a, NULL, r, ImBuf::rect, ImBuf::rect_float, x, ImBuf::x, y, and ImBuf::y.

Referenced by IMB_half_x(), and imb_onehalf_no_alloc().

◆ IMB_half_y()

struct ImBuf* IMB_half_y ( struct ImBuf * ibuf1 )

Attention: defined in scaling.c

Definition at line 253 of file scaling.c.

References ImBuf::flags, IMB_allocImBuf(), IMB_dupImBuf(), imb_half_y_no_alloc(), NULL, ImBuf::planes, ImBuf::rect, ImBuf::rect_float, ImBuf::x, and ImBuf::y.

Referenced by IMB_onehalf().

◆ imb_half_y_no_alloc()

static void imb_half_y_no_alloc	(	struct ImBuf *	ibuf2,
		struct ImBuf *	ibuf1
	)

static

Definition at line 186 of file scaling.c.

References Freestyle::a, NULL, r, ImBuf::rect, ImBuf::rect_float, x, ImBuf::x, y, and ImBuf::y.

Referenced by IMB_half_y(), and imb_onehalf_no_alloc().

◆ IMB_onehalf()

ImBuf* IMB_onehalf ( struct ImBuf * ibuf1 )

Attention: Defined in scaling.c

Definition at line 453 of file scaling.c.

References ImBuf::flags, IMB_allocImBuf(), IMB_half_x(), IMB_half_y(), imb_onehalf_no_alloc(), NULL, ImBuf::planes, ImBuf::rect, ImBuf::rect_float, ImBuf::x, and ImBuf::y.

Referenced by IMB_makemipmap().

◆ imb_onehalf_no_alloc()

void imb_onehalf_no_alloc	(	struct ImBuf *	ibuf2,
		struct ImBuf *	ibuf1
	)

Definition at line 376 of file scaling.c.

References imb_addrectImBuf(), imb_half_x_no_alloc(), imb_half_y_no_alloc(), NULL, premul_ushort_to_straight_uchar(), ImBuf::rect, ImBuf::rect_float, straight_uchar_to_premul_ushort(), x, ImBuf::x, y, and ImBuf::y.

Referenced by IMB_onehalf(), and IMB_remakemipmap().

◆ IMB_scalefastImBuf()

bool IMB_scalefastImBuf	(	struct ImBuf *	ibuf,
		unsigned int	newx,
		unsigned int	newy
	)

Return true if ibuf is modified.

Definition at line 1715 of file scaling.c.

References BLI_assert, IB_rect, IB_rectfloat, imb_freerectfloatImBuf(), imb_freerectImBuf(), ImBuf::mall, MEM_freeN, MEM_mallocN, NULL, ImBuf::rect, ImBuf::rect_float, scalefast_Z_ImBuf(), x, ImBuf::x, y, and ImBuf::y.

Referenced by icon_copy_rect(), py_imbuf_resize(), and seq_proxy_build_frame().

◆ IMB_scaleImBuf()

bool IMB_scaleImBuf	(	struct ImBuf *	ibuf,
		unsigned int	newx,
		unsigned int	newy
	)

Return true if ibuf is modified.

Definition at line 1667 of file scaling.c.

References BLI_assert, NULL, q_scale_linear_interpolation(), ImBuf::rect, ImBuf::rect_float, scaledownx(), scaledowny(), scalefast_Z_ImBuf(), scaleupx(), scaleupy(), x, ImBuf::x, y, and ImBuf::y.

Referenced by accessor_get_ibuf(), BKE_image_scale(), BKE_previewimg_ensure(), blend_file_thumb(), get_undistorted_ibuf(), icon_draw_rect(), icon_verify_datatoc(), image_scale_exec(), imb_gpu_get_data(), Freestyle::Canvas::loadMap(), movieclip_build_proxy_ibuf(), py_imbuf_resize(), thumb_create_ex(), ui_draw_but_IMAGE(), update_do_scale(), wm_block_create_about(), and wm_block_splash_image().

◆ IMB_scaleImBuf_threaded()

void IMB_scaleImBuf_threaded	(	struct ImBuf *	ibuf,
		unsigned int	newx,
		unsigned int	newy
	)

Attention: Defined in scaling.c

Definition at line 1889 of file scaling.c.

References BLI_assert, ImBuf::channels, do_scale_thread(), IB_rect, IB_rectfloat, imb_freerectfloatImBuf(), imb_freerectImBuf(), IMB_processor_apply_threaded(), init_data(), ImBuf::mall, MEM_mallocN, NULL, ImBuf::rect, ImBuf::rect_float, scale_thread_init(), ImBuf::x, and ImBuf::y.

Referenced by imb_stereo3d_squeeze_ImBuf(), imb_stereo3d_squeeze_rect(), imb_stereo3d_squeeze_rectf(), imb_stereo3d_unsqueeze_ImBuf(), and movieclip_build_proxy_ibuf().

◆ premul_ushort_to_straight_uchar()

MINLINE void premul_ushort_to_straight_uchar	(	unsigned char *	result,
		const unsigned short	color[4]
	)

Definition at line 357 of file scaling.c.

References alpha, result, and unit_ushort_to_uchar().

Referenced by imb_onehalf_no_alloc().

◆ q_scale_byte()

static void q_scale_byte	(	unsigned char *	in,
		unsigned char *	out,
		int	in_width,
		int	in_height,
		int	dst_width,
		int	dst_height
	)

static

Definition at line 666 of file scaling.c.

References enlarge_picture_byte(), and shrink_picture_byte().

Referenced by q_scale_linear_interpolation().

◆ q_scale_float()

static void q_scale_float	(	float *	in,
		float *	out,
		int	in_width,
		int	in_height,
		int	dst_width,
		int	dst_height
	)

static

Definition at line 852 of file scaling.c.

References enlarge_picture_float(), and shrink_picture_float().

Referenced by q_scale_linear_interpolation().

◆ q_scale_linear_interpolation()

static bool q_scale_linear_interpolation	(	struct ImBuf *	ibuf,
		int	newx,
		int	newy
	)

static

q_scale_linear_interpolation (derived from ppmqscale, http://libdv.sf.net)

q stands for quick and quality :)

only handles common cases when we either

scale both, x and y or shrink both, x and y

but that is pretty fast:

does only blit once instead of two passes like the old code (fewer cache misses)
uses fixed point integer arithmetic for byte buffers
doesn't branch in tight loops

Should be comparable in speed to the ImBuf ..._fast functions at least for byte-buffers.

NOTE: disabled, due to unacceptable inaccuracy and quality loss, see bug T18609 (ton)

Definition at line 884 of file scaling.c.

References IB_rect, IB_rectfloat, imb_freerectfloatImBuf(), imb_freerectImBuf(), ImBuf::mall, MEM_mallocN, q_scale_byte(), q_scale_float(), ImBuf::rect, ImBuf::rect_float, x, ImBuf::x, y, and ImBuf::y.