From 83d0c360cc648e02650aa4d341dbf5205c1e708f Mon Sep 17 00:00:00 2001
From: v-rob <robinsonvincent89@gmail.com>
Date: Wed, 19 Aug 2020 18:14:47 -0700
Subject: Add gradients and borders to FormSpec boxes (#8676)

---
 src/gui/guiBox.cpp | 86 +++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 82 insertions(+), 4 deletions(-)

(limited to 'src/gui/guiBox.cpp')

diff --git a/src/gui/guiBox.cpp b/src/gui/guiBox.cpp
index 7f329cc32..99a115daf 100644
--- a/src/gui/guiBox.cpp
+++ b/src/gui/guiBox.cpp
@@ -20,9 +20,14 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "guiBox.h"
 
 GUIBox::GUIBox(gui::IGUIEnvironment *env, gui::IGUIElement *parent, s32 id,
-	const core::rect<s32> &rectangle, const video::SColor &color) :
+	const core::rect<s32> &rectangle,
+	const std::array<video::SColor, 4> &colors,
+	const std::array<video::SColor, 4> &bordercolors,
+	const std::array<s32, 4> &borderwidths) :
 	gui::IGUIElement(gui::EGUIET_ELEMENT, env, parent, id, rectangle),
-	m_color(color)
+	m_colors(colors),
+	m_bordercolors(bordercolors),
+	m_borderwidths(borderwidths)
 {
 }
 
@@ -31,8 +36,81 @@ void GUIBox::draw()
 	if (!IsVisible)
 		return;
 
-	Environment->getVideoDriver()->draw2DRectangle(m_color, AbsoluteRect,
-			&AbsoluteClippingRect);
+	std::array<s32, 4> negative_borders = {0, 0, 0, 0};
+	std::array<s32, 4> positive_borders = {0, 0, 0, 0};
+
+	for (size_t i = 0; i <= 3; i++) {
+		if (m_borderwidths[i] > 0)
+			positive_borders[i] = m_borderwidths[i];
+		else
+			negative_borders[i] = m_borderwidths[i];
+	}
+
+	v2s32 upperleft = AbsoluteRect.UpperLeftCorner;
+	v2s32 lowerright = AbsoluteRect.LowerRightCorner;
+
+	v2s32 topleft_border = {
+		upperleft.X - positive_borders[3],
+		upperleft.Y - positive_borders[0]
+	};
+	v2s32 topleft_rect = {
+		upperleft.X - negative_borders[3],
+		upperleft.Y - negative_borders[0]
+	};
+
+	v2s32 lowerright_border = {
+		lowerright.X + positive_borders[1],
+		lowerright.Y + positive_borders[2]
+	};
+	v2s32 lowerright_rect = {
+		lowerright.X + negative_borders[1],
+		lowerright.Y + negative_borders[2]
+	};
+
+	core::rect<s32> main_rect(
+		topleft_rect.X,
+		topleft_rect.Y,
+		lowerright_rect.X,
+		lowerright_rect.Y
+	);
+
+	std::array<core::rect<s32>, 4> border_rects;
+
+	border_rects[0] = core::rect<s32>(
+		topleft_border.X,
+		topleft_border.Y,
+		lowerright_border.X,
+		topleft_rect.Y
+	);
+
+	border_rects[1] = core::rect<s32>(
+		lowerright_rect.X,
+		topleft_rect.Y,
+		lowerright_border.X,
+		lowerright_rect.Y
+	);
+
+	border_rects[2] = core::rect<s32>(
+		topleft_border.X,
+		lowerright_rect.Y,
+		lowerright_border.X,
+		lowerright_border.Y
+	);
+
+	border_rects[3] = core::rect<s32>(
+		topleft_border.X,
+		topleft_rect.Y,
+		topleft_rect.X,
+		lowerright_rect.Y
+	);
+
+	video::IVideoDriver *driver = Environment->getVideoDriver();
+
+	driver->draw2DRectangle(main_rect, m_colors[0], m_colors[1], m_colors[3],
+		m_colors[2], nullptr);
+
+	for (size_t i = 0; i <= 3; i++)
+		driver->draw2DRectangle(m_bordercolors[i], border_rects[i], nullptr);
 
 	IGUIElement::draw();
 }
-- 
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