static void
gradient_render_pixel (gdouble x,
gdouble y,
GimpRGB *color,
gpointer render_data)
{
RenderBlendData *rbd = render_data;
gdouble factor;
/* Calculate blending factor */
switch (rbd->gradient_type)
{
case GIMP_GRADIENT_LINEAR:
factor = gradient_calc_linear_factor (rbd->dist,
rbd->vec, rbd->offset,
x - rbd->sx, y - rbd->sy);
break;
case GIMP_GRADIENT_BILINEAR:
factor = gradient_calc_bilinear_factor (rbd->dist,
rbd->vec, rbd->offset,
x - rbd->sx, y - rbd->sy);
break;
case GIMP_GRADIENT_RADIAL:
factor = gradient_calc_radial_factor (rbd->dist,
rbd->offset,
x - rbd->sx, y - rbd->sy);
break;
case GIMP_GRADIENT_SQUARE:
factor = gradient_calc_square_factor (rbd->dist, rbd->offset,
x - rbd->sx, y - rbd->sy);
break;
case GIMP_GRADIENT_CONICAL_SYMMETRIC:
factor = gradient_calc_conical_sym_factor (rbd->dist,
rbd->vec, rbd->offset,
x - rbd->sx, y - rbd->sy);
break;
case GIMP_GRADIENT_CONICAL_ASYMMETRIC:
factor = gradient_calc_conical_asym_factor (rbd->dist,
rbd->vec, rbd->offset,
x - rbd->sx, y - rbd->sy);
break;
case GIMP_GRADIENT_SHAPEBURST_ANGULAR:
factor = gradient_calc_shapeburst_angular_factor (rbd->dist_buffer, x, y);
break;
case GIMP_GRADIENT_SHAPEBURST_SPHERICAL:
factor = gradient_calc_shapeburst_spherical_factor (rbd->dist_buffer, x, y);
break;
case GIMP_GRADIENT_SHAPEBURST_DIMPLED:
factor = gradient_calc_shapeburst_dimpled_factor (rbd->dist_buffer, x, y);
break;
case GIMP_GRADIENT_SPIRAL_CLOCKWISE:
factor = gradient_calc_spiral_factor (rbd->dist,
rbd->vec, rbd->offset,
x - rbd->sx, y - rbd->sy, TRUE);
break;
case GIMP_GRADIENT_SPIRAL_ANTICLOCKWISE:
factor = gradient_calc_spiral_factor (rbd->dist,
rbd->vec, rbd->offset,
x - rbd->sx, y - rbd->sy, FALSE);
break;
default:
g_assert_not_reached ();
return;
}
/* Adjust for repeat */
switch (rbd->repeat)
{
case GIMP_REPEAT_NONE:
factor = CLAMP (factor, 0.0, 1.0);
break;
case GIMP_REPEAT_SAWTOOTH:
factor = factor - floor (factor);
break;
case GIMP_REPEAT_TRIANGULAR:
{
guint ifactor;
if (factor < 0.0)
factor = -factor;
ifactor = (guint) factor;
factor = factor - floor (factor);
if (ifactor & 1)
factor = 1.0 - factor;
}
break;
}
/* Blend the colors */
if (rbd->blend_mode == GIMP_CUSTOM_MODE)
{
#ifdef USE_GRADIENT_CACHE
*color = rbd->gradient_cache[(gint) (factor * (rbd->gradient_cache_size - 1))];
#else
gimp_gradient_get_color_at (rbd->gradient, rbd->context, NULL,
factor, rbd->reverse, color);
#endif
}
else
{
/* Blend values */
if (rbd->reverse)
factor = 1.0 - factor;
color->r = rbd->fg.r + (rbd->bg.r - rbd->fg.r) * factor;
color->g = rbd->fg.g + (rbd->bg.g - rbd->fg.g) * factor;
color->b = rbd->fg.b + (rbd->bg.b - rbd->fg.b) * factor;
color->a = rbd->fg.a + (rbd->bg.a - rbd->fg.a) * factor;
if (rbd->blend_mode == GIMP_FG_BG_HSV_MODE)
{
GimpHSV hsv = *((GimpHSV *) color);
gimp_hsv_to_rgb (&hsv, color);
}
}
}
static void
gradient_render_pixel (gdouble x,
gdouble y,
GimpRGB *color,
gpointer render_data)
{
RenderBlendData *rbd = render_data;
gdouble factor;
/* Calculate blending factor */
switch (rbd->gradient_type)
{
case GIMP_GRADIENT_LINEAR:
factor = gradient_calc_linear_factor (rbd->dist,
rbd->vec, rbd->offset,
x - rbd->sx, y - rbd->sy);
break;
case GIMP_GRADIENT_BILINEAR:
factor = gradient_calc_bilinear_factor (rbd->dist,
rbd->vec, rbd->offset,
x - rbd->sx, y - rbd->sy);
break;
case GIMP_GRADIENT_RADIAL:
factor = gradient_calc_radial_factor (rbd->dist,
rbd->offset,
x - rbd->sx, y - rbd->sy);
break;
case GIMP_GRADIENT_SQUARE:
factor = gradient_calc_square_factor (rbd->dist, rbd->offset,
x - rbd->sx, y - rbd->sy);
break;
case GIMP_GRADIENT_CONICAL_SYMMETRIC:
factor = gradient_calc_conical_sym_factor (rbd->dist,
rbd->vec, rbd->offset,
x - rbd->sx, y - rbd->sy);
break;
case GIMP_GRADIENT_CONICAL_ASYMMETRIC:
factor = gradient_calc_conical_asym_factor (rbd->dist,
rbd->vec, rbd->offset,
x - rbd->sx, y - rbd->sy);
break;
case GIMP_GRADIENT_SHAPEBURST_ANGULAR:
factor = gradient_calc_shapeburst_angular_factor (rbd->dist_buffer, x, y);
break;
case GIMP_GRADIENT_SHAPEBURST_SPHERICAL:
factor = gradient_calc_shapeburst_spherical_factor (rbd->dist_buffer, x, y);
break;
case GIMP_GRADIENT_SHAPEBURST_DIMPLED:
factor = gradient_calc_shapeburst_dimpled_factor (rbd->dist_buffer, x, y);
break;
case GIMP_GRADIENT_SPIRAL_CLOCKWISE:
factor = gradient_calc_spiral_factor (rbd->dist,
rbd->vec, rbd->offset,
x - rbd->sx, y - rbd->sy, TRUE);
break;
case GIMP_GRADIENT_SPIRAL_ANTICLOCKWISE:
factor = gradient_calc_spiral_factor (rbd->dist,
rbd->vec, rbd->offset,
x - rbd->sx, y - rbd->sy, FALSE);
break;
default:
g_assert_not_reached ();
return;
}
/* Adjust for repeat */
switch (rbd->repeat)
{
case GIMP_REPEAT_TRUNCATE:
break;
case GIMP_REPEAT_NONE:
factor = CLAMP (factor, 0.0, 1.0);
break;
case GIMP_REPEAT_SAWTOOTH:
factor = factor - floor (factor);
break;
case GIMP_REPEAT_TRIANGULAR:
{
guint ifactor;
if (factor < 0.0)
factor = -factor;
ifactor = (guint) factor;
factor = factor - floor (factor);
if (ifactor & 1)
factor = 1.0 - factor;
}
break;
}
/* Blend the colors */
if (factor < 0.0 || factor > 1.0)
{
color->r = color->g = color->b = 0;
color->a = GIMP_OPACITY_TRANSPARENT;
}
else
{
#ifdef USE_GRADIENT_CACHE
*color = rbd->gradient_cache[(gint) (factor * (rbd->gradient_cache_size - 1))];
#else
gimp_gradient_get_color_at (rbd->gradient, rbd->context, NULL,
factor, rbd->reverse, color);
#endif
}
}