brush_profile.h File Reference

Inline brush profile and mass primitives shared by paint/brush code. More...

#include "iop/drawlayer/brush.h"
#include <math.h>

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Functions
static float	dt_drawlayer_brush_profile_clamp01 (const float v)
	Clamp scalar value to [0, 1].
static float	dt_drawlayer_brush_transition_profile_eval (const int shape, const float t, const float inv_t)
	Evaluate normalized edge-falloff transition profile by shape.
static float	dt_drawlayer_brush_transition_mass_primitive_eval (const int shape, const float u, const float inner, const float w, const float base)
	Evaluate integrated mass primitive of transition zone by shape.
static float	dt_drawlayer_brush_profile_eval (const dt_drawlayer_brush_dab_t *dab, const float norm2)
	Evaluate normalized brush profile at squared normalized radius.
static float	dt_drawlayer_brush_mass_primitive_eval (const dt_drawlayer_brush_dab_t *dab, const float u_in)
	Evaluate radial mass primitive from center to normalized radius u_in.

Detailed Description

Inline brush profile and mass primitives shared by paint/brush code.

Function Documentation

dt_drawlayer_brush_mass_primitive_eval()

static float dt_drawlayer_brush_mass_primitive_eval ( const dt_drawlayer_brush_dab_t *  dab, const float  u_in  )

inlinestatic

Evaluate radial mass primitive from center to normalized radius u_in.

Note

Used by stroke-level overlap normalization.

References dt_drawlayer_brush_profile_clamp01(), DT_DRAWLAYER_BRUSH_SHAPE_GAUSSIAN, dt_drawlayer_brush_transition_mass_primitive_eval(), dt_drawlayer_brush_dab_t::hardness, dt_drawlayer_brush_dab_t::radius, and dt_drawlayer_brush_dab_t::shape.

Referenced by _paint_stroke_sample_opacity_scale().

dt_drawlayer_brush_profile_clamp01()

static float dt_drawlayer_brush_profile_clamp01 ( const float  v )

inlinestatic

Clamp scalar value to [0, 1].

References v.

Referenced by dt_drawlayer_brush_mass_primitive_eval(), dt_drawlayer_brush_profile_eval(), and dt_drawlayer_brush_transition_mass_primitive_eval().

dt_drawlayer_brush_profile_eval()

static float dt_drawlayer_brush_profile_eval ( const dt_drawlayer_brush_dab_t *  dab, const float  norm2  )

inlinestatic

Evaluate normalized brush profile at squared normalized radius.

Parameters

dab	Current dab parameters.
norm2	Squared normalized radius (r^2 in [0, inf)).

References dt_drawlayer_brush_profile_clamp01(), DT_DRAWLAYER_BRUSH_SHAPE_GAUSSIAN, dt_drawlayer_brush_transition_profile_eval(), dt_drawlayer_brush_dab_t::hardness, dt_drawlayer_brush_dab_t::radius, dt_drawlayer_brush_dab_t::shape, and t.

Referenced by _paint_stroke_sample_opacity_scale(), _prepare_analytic_pixel_context(), _prepare_blur_context(), dt_drawlayer_brush_rasterize_dab_argb8(), and dt_drawlayer_brush_rasterize_dab_rgbaf().

dt_drawlayer_brush_transition_mass_primitive_eval()

static float dt_drawlayer_brush_transition_mass_primitive_eval ( const int  shape, const float  u, const float  inner, const float  w, const float  base  )

inlinestatic

Evaluate integrated mass primitive of transition zone by shape.

References delta, dt_drawlayer_brush_profile_clamp01(), DT_DRAWLAYER_BRUSH_SHAPE_LINEAR, DT_DRAWLAYER_BRUSH_SHAPE_QUADRATIC, and DT_DRAWLAYER_BRUSH_SHAPE_SIGMOIDAL.

Referenced by dt_drawlayer_brush_mass_primitive_eval().

dt_drawlayer_brush_transition_profile_eval()

static float dt_drawlayer_brush_transition_profile_eval ( const int  shape, const float  t, const float  inv_t  )

inlinestatic

Evaluate normalized edge-falloff transition profile by shape.

References DT_DRAWLAYER_BRUSH_SHAPE_LINEAR, DT_DRAWLAYER_BRUSH_SHAPE_QUADRATIC, DT_DRAWLAYER_BRUSH_SHAPE_SIGMOIDAL, and t.

Referenced by dt_drawlayer_brush_profile_eval().