less of a [BUG] but more of a [HELP]

[CPlusPlusNewb]

i'm trying to add some gradients from xy0, but when i'm trying to make them into "context.window.render" functions rater then "render::" (so i can draw over stuff), i don't get the output i'm looking for...

not wanted output, but draws over stuff:
https://i.imgur.com/HNbvpKz.png

void GradientH(float x, float y, float w, float h, color c1, color c2)
{
	context.window.render.emplace_back(zgui::zgui_control_render_t{ {x, y}, zgui::zgui_render_type::zgui_filled_rect, c1, "", {w, h} });
	BYTE first = c2.r;
	BYTE second = c2.g;
	BYTE third = c2.b;
	for (float i = 0; i < w; i++)
	{
		float fi = i, fw = w;
		float a = fi / fw;
		/*DWORD*/float ia = a * 255;
		context.window.render.emplace_back(zgui::zgui_control_render_t{ {x + i, y}, zgui::zgui_render_type::zgui_filled_rect, color(first, second, third, ia), "", {1, h} });
	}
}

wanted output, but not drawing over stuff:
https://i.imgur.com/NCdyjgD.png

void GradientH(float x, float y, float w, float h, color c1, color c2)
{
	render::filled_rect(x, y, w, h, c1);
	BYTE first = c2.r;
	BYTE second = c2.g;
	BYTE third = c2.b;
	for (float i = 0; i < w; i++)
	{
		float fi = i, fw = w;
		float a = fi / fw;
		/*DWORD*/float ia = a * 255;
		render::filled_rect(x + i, y, 1, h, color(first, second, third, ia));
	}
}

any help is greatly appreciated, ive looked over this about 10 times, and cant seem to understand why it doesn't work.

[txxmo]

ZGUI legacy is no longer in development. So you probably won’t get many answers.
What would suggest is:
Not pasting
Take a good look at where you’re using the code.