bullet3/examples/ThirdPartyLibs/Gwen/Skins/Texturing.h

#pragma once
#ifndef GWEN_SKINS_TEXTURING_H
#define GWEN_SKINS_TEXTURING_H

#include "Gwen/Gwen.h"
#include "Gwen/Texture.h"

namespace Gwen
{
namespace Skin
{
namespace Texturing
{
struct Single
{
	Single()
	{
		texture = NULL;
	}

	void Init(Texture* pTexture, float x, float y, float w, float h)
	{
		texture = pTexture;

		float texw = texture->width;
		float texh = texture->height;

		uv[0] = x / texw;
		uv[1] = y / texh;
		uv[2] = (x + w) / texw;
		uv[3] = (y + h) / texh;
	}

	void Draw(Gwen::Renderer::Base* render, Gwen::Rect r, const Gwen::Color& col = Gwen::Colors::White)
	{
		render->SetDrawColor(col);

		render->DrawTexturedRect(texture, r, uv[0], uv[1], uv[2], uv[3]);
	}

	Texture* texture;
	float uv[4];
};

struct Bordered
{
	Bordered()
	{
		texture = NULL;
	}

	void Init(Texture* pTexture, float x, float y, float w, float h, Margin in_margin, float DrawMarginScale = 1.0f)
	{
		texture = pTexture;

		margin = in_margin;

		SetRect(0, x, y, margin.left, margin.top);
		SetRect(1, x + margin.left, y, w - margin.left - margin.right - 1, margin.top);
		SetRect(2, (x + w) - margin.right, y, margin.right, margin.top);

		SetRect(3, x, y + margin.top, margin.left, h - margin.top - margin.bottom - 1);
		SetRect(4, x + margin.left, y + margin.top, w - margin.left - margin.right - 1, h - margin.top - margin.bottom - 1);
		SetRect(5, (x + w) - margin.right, y + margin.top, margin.right, h - margin.top - margin.bottom - 1);

		SetRect(6, x, (y + h) - margin.bottom, margin.left, margin.bottom);
		SetRect(7, x + margin.left, (y + h) - margin.bottom, w - margin.left - margin.right - 1, margin.bottom);
		SetRect(8, (x + w) - margin.right, (y + h) - margin.bottom, margin.right, margin.bottom);

		margin.left *= DrawMarginScale;
		margin.right *= DrawMarginScale;
		margin.top *= DrawMarginScale;
		margin.bottom *= DrawMarginScale;

		width = w - x;
		height = h - y;
	}

	void SetRect(int iNum, float x, float y, float w, float h)
	{
		float texw = texture->width;
		float texh = texture->height;

		//x -= 1.0f;
		//y -= 1.0f;

		rects[iNum].uv[0] = x / texw;
		rects[iNum].uv[1] = y / texh;

		rects[iNum].uv[2] = (x + w) / texw;
		rects[iNum].uv[3] = (y + h) / texh;

		//	rects[iNum].uv[0] += 1.0f / texture->width;
		//	rects[iNum].uv[1] += 1.0f / texture->width;
	}

	void Draw(Gwen::Renderer::Base* render, Gwen::Rect r, const Gwen::Color& col = Gwen::Colors::White)
	{
		render->SetDrawColor(col);

		if (r.w < width && r.h < height)
		{
			render->DrawTexturedRect(texture,
									 r,
									 rects[0].uv[0], rects[0].uv[1], rects[8].uv[2], rects[8].uv[3]);
			return;
		}

		DrawRect(render, 0, r.x, r.y, margin.left, margin.top);
		DrawRect(render, 1, r.x + margin.left, r.y, r.w - margin.left - margin.right, margin.top);
		DrawRect(render, 2, (r.x + r.w) - margin.right, r.y, margin.right, margin.top);

		DrawRect(render, 3, r.x, r.y + margin.top, margin.left, r.h - margin.top - margin.bottom);
		DrawRect(render, 4, r.x + margin.left, r.y + margin.top, r.w - margin.left - margin.right, r.h - margin.top - margin.bottom);
		DrawRect(render, 5, (r.x + r.w) - margin.right, r.y + margin.top, margin.right, r.h - margin.top - margin.bottom);

		DrawRect(render, 6, r.x, (r.y + r.h) - margin.bottom, margin.left, margin.bottom);
		DrawRect(render, 7, r.x + margin.left, (r.y + r.h) - margin.bottom, r.w - margin.left - margin.right, margin.bottom);
		DrawRect(render, 8, (r.x + r.w) - margin.right, (r.y + r.h) - margin.bottom, margin.right, margin.bottom);
	}

	void DrawRect(Gwen::Renderer::Base* render, int i, int x, int y, int w, int h)
	{
		render->DrawTexturedRect(texture,
								 Gwen::Rect(x, y, w, h),
								 rects[i].uv[0], rects[i].uv[1], rects[i].uv[2], rects[i].uv[3]);
	}

	Texture* texture;

	struct SubRect
	{
		float uv[4];
	};

	SubRect rects[9];
	Margin margin;

	float width;
	float height;
};
}  // namespace Texturing
}  // namespace Skin
}  // namespace Gwen
#endif