inline value_type convert(const value_type& v, ColorSpaceType input, ColorSpaceType output) {
if (input == ColorSpaceRGB) {
if (output == ColorSpaceRGB) return v;
if (output == ColorSpaceYUV) return rgb_to_yuv(v);
if (output == ColorSpaceLAB) return rgb_to_lab(v);
}
if (input == ColorSpaceYUV) {
if (output == ColorSpaceRGB) return yuv_to_rgb(v);
if (output == ColorSpaceYUV) return v;
if (output == ColorSpaceLAB) return yuv_to_lab(v);
}
if (input == ColorSpaceLAB) {
if (output == ColorSpaceRGB) return lab_to_rgb(v);
if (output == ColorSpaceYUV) return lab_to_yuv(v);
if (output == ColorSpaceLAB) return v;
}
return value_type::Zero();
}
static gstack_t* rectify_rgb(grd5_grad_custom_t* gradc, pssvg_opt_t opt)
{
grd5_colour_stop_t *grd5_stop = gradc->colour.stops;
int n = gradc->colour.n;
if (n<2)
{
btrace("input (grd5) has %i rgb stop(s)", n);
return NULL;
}
for (int i = 0 ; i < n ; i++)
{
grd5_colour_stop_t *stop = grd5_stop + i;
switch(stop->type)
{
case GRD5_MODEL_RGB:
break;
case GRD5_MODEL_GRSC:
grsc_to_rgb(stop);
break;
case GRD5_MODEL_HSB:
hsb_to_rgb(stop);
break;
case GRD5_MODEL_CMYC:
cmyc_to_rgb(stop);
break;
case GRD5_MODEL_LAB:
lab_to_rgb(stop);
break;
case GRD5_MODEL_BCKC:
stop->u.rgb.Rd = opt.bg.red;
stop->u.rgb.Grn = opt.bg.green;
stop->u.rgb.Bl = opt.bg.blue;
stop->type = GRD5_MODEL_RGB;
break;
case GRD5_MODEL_FRGC:
stop->u.rgb.Rd = opt.fg.red;
stop->u.rgb.Grn = opt.fg.green;
stop->u.rgb.Bl = opt.fg.blue;
stop->type = GRD5_MODEL_RGB;
break;
case GRD5_MODEL_BOOK:
btrace("stop %i (book colour) not converted", i);
return NULL;
default:
btrace("stop %i unknown colour type %i", i, stop->type);
return NULL;
}
if (stop->type != GRD5_MODEL_RGB)
{
btrace("stop %i is non-RGB (type %i)", i, stop->type);
return NULL;
}
}
gstack_t *stack = gstack_new(sizeof(rgb_stop_t), 2*n, n);
if (stack != NULL)
{
if (rectify_rgb2(gradc, stack, opt) == 0)
return stack;
gstack_destroy(stack);
}
return NULL;
}
inline value_type lab_to_yuv(const value_type& v) {
return rgb_to_yuv(lab_to_rgb(v));
}
rgb_color& from_lab(const color_lab& lab) {
lab_to_rgb(lab, this);
return *this;
}
