From 46dcba65e55749b57061e12504937b3d426a3c01 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Branimir=20Karad=C5=BEi=C4=87?= <branimirkaradzic@gmail.com>
Date: Mon, 16 Apr 2018 17:58:17 -0700
Subject: [PATCH] debugdraw: Added depth test less to begin.

---
 examples/common/debugdraw/debugdraw.cpp | 51 ++++++++++++++++++-------
 examples/common/debugdraw/debugdraw.h   | 12 ++++--
 2 files changed, 46 insertions(+), 17 deletions(-)

diff --git a/examples/common/debugdraw/debugdraw.cpp b/examples/common/debugdraw/debugdraw.cpp
index 60fe7d109..61623348d 100644
--- a/examples/common/debugdraw/debugdraw.cpp
+++ b/examples/common/debugdraw/debugdraw.cpp
@@ -1007,24 +1007,24 @@ struct DebugDrawEncoderImpl
 	{
 	}
 
-	void init(bool _depthTestLess, bgfx::Encoder* _encoder)
+	void init(bgfx::Encoder* _encoder)
 	{
 		m_defaultEncoder = _encoder;
-		m_depthTestLess  = _depthTestLess;
 	}
 
 	void shutdown()
 	{
 	}
 
-	void begin(bgfx::ViewId _viewId, bgfx::Encoder* _encoder)
+	void begin(bgfx::ViewId _viewId, bool _depthTestLess, bgfx::Encoder* _encoder)
 	{
 		BX_CHECK(State::Count == m_state);
 
-		m_viewId  = _viewId;
-		m_encoder = _encoder == NULL ? m_defaultEncoder : _encoder;
-		m_state   = State::None;
-		m_stack   = 0;
+		m_viewId        = _viewId;
+		m_encoder       = _encoder == NULL ? m_defaultEncoder : _encoder;
+		m_state         = State::None;
+		m_stack         = 0;
+		m_depthTestLess = _depthTestLess;
 
 		m_pos       = 0;
 		m_indexPos  = 0;
@@ -1081,6 +1081,19 @@ struct DebugDrawEncoderImpl
 		--m_stack;
 	}
 
+	void setDepthTestLess(bool _depthTestLess)
+	{
+		BX_CHECK(State::Count != m_state);
+		if (m_depthTestLess != _depthTestLess)
+		{
+			m_depthTestLess = _depthTestLess;
+			flush();
+			Attrib& attrib = m_attrib[m_stack];
+			attrib.m_state &= ~BGFX_STATE_DEPTH_TEST_MASK;
+			attrib.m_state |= _depthTestLess ? BGFX_STATE_DEPTH_TEST_LESS : BGFX_STATE_DEPTH_TEST_GREATER;
+		}
+	}
+
 	void setTransform(const void* _mtx, uint16_t _num = 1)
 	{
 		BX_CHECK(State::Count != m_state);
@@ -2293,10 +2306,10 @@ struct DebugDrawEncoderImpl
 static DebugDrawEncoderImpl s_dde;
 BX_STATIC_ASSERT(sizeof(DebugDrawEncoderImpl) <= sizeof(DebugDrawEncoder), "Size must match");
 
-void ddInit(bool _depthTestLess, bx::AllocatorI* _allocator)
+void ddInit(bx::AllocatorI* _allocator)
 {
 	s_dds.init(_allocator);
-	s_dde.init(_depthTestLess, bgfx::begin() );
+	s_dde.init(bgfx::begin() );
 }
 
 void ddShutdown()
@@ -2325,9 +2338,9 @@ void ddDestroy(GeometryHandle _handle)
 	s_dds.destroy(_handle);
 }
 
-void ddBegin(uint16_t _viewId, bgfx::Encoder* _encoder)
+void ddBegin(uint16_t _viewId, bool _depthTestLess, bgfx::Encoder* _encoder)
 {
-	s_dde.begin(_viewId, _encoder);
+	s_dde.begin(_viewId, _depthTestLess, _encoder);
 }
 
 void ddEnd()
@@ -2345,6 +2358,11 @@ void ddPop()
 	s_dde.pop();
 }
 
+void ddSetDepthTestLess(bool _depthTestLess)
+{
+	s_dde.setDepthTestLess(_depthTestLess);
+}
+
 void ddSetState(bool _depthTest, bool _depthWrite, bool _clockwise)
 {
 	s_dde.setState(_depthTest, _depthWrite, _clockwise);
@@ -2534,7 +2552,7 @@ void ddDrawOrb(float _x, float _y, float _z, float _radius, Axis::Enum _hightlig
 
 DebugDrawEncoder::DebugDrawEncoder()
 {
-	DEBUG_DRAW_ENCODER(init(true, s_dde.m_defaultEncoder) );
+	DEBUG_DRAW_ENCODER(init(s_dde.m_defaultEncoder) );
 }
 
 DebugDrawEncoder::~DebugDrawEncoder()
@@ -2542,9 +2560,9 @@ DebugDrawEncoder::~DebugDrawEncoder()
 	DEBUG_DRAW_ENCODER(shutdown() );
 }
 
-void DebugDrawEncoder::begin(uint16_t _viewId, bgfx::Encoder* _encoder)
+void DebugDrawEncoder::begin(uint16_t _viewId, bool _depthTestLess, bgfx::Encoder* _encoder)
 {
-	DEBUG_DRAW_ENCODER(begin(_viewId, _encoder) );
+	DEBUG_DRAW_ENCODER(begin(_viewId, _depthTestLess, _encoder) );
 }
 
 void DebugDrawEncoder::end()
@@ -2562,6 +2580,11 @@ void DebugDrawEncoder::pop()
 	DEBUG_DRAW_ENCODER(pop() );
 }
 
+void DebugDrawEncoder::setDepthTestLess(bool _depthTestLess)
+{
+	DEBUG_DRAW_ENCODER(setDepthTestLess(_depthTestLess) );
+}
+
 void DebugDrawEncoder::setState(bool _depthTest, bool _depthWrite, bool _clockwise)
 {
 	DEBUG_DRAW_ENCODER(setState(_depthTest, _depthWrite, _clockwise) );
diff --git a/examples/common/debugdraw/debugdraw.h b/examples/common/debugdraw/debugdraw.h
index 6b73efc96..a3cff48ce 100644
--- a/examples/common/debugdraw/debugdraw.h
+++ b/examples/common/debugdraw/debugdraw.h
@@ -33,7 +33,7 @@ struct GeometryHandle { uint16_t idx; };
 inline bool isValid(GeometryHandle _handle) { return _handle.idx != UINT16_MAX; }
 
 ///
-void ddInit(bool _depthTestLess = true, bx::AllocatorI* _allocator = NULL);
+void ddInit(bx::AllocatorI* _allocator = NULL);
 
 ///
 void ddShutdown();
@@ -60,7 +60,7 @@ struct DebugDrawEncoder
 	~DebugDrawEncoder();
 
 	///
-	void begin(uint16_t _viewId, bgfx::Encoder* _encoder = NULL);
+	void begin(uint16_t _viewId, bool _depthTestLess = true, bgfx::Encoder* _encoder = NULL);
 
 	///
 	void end();
@@ -71,6 +71,9 @@ struct DebugDrawEncoder
 	///
 	void pop();
 
+	///
+	void setDepthTestLess(bool _depthTestLess);
+
 	///
 	void setState(bool _depthTest, bool _depthWrite, bool _clockwise);
 
@@ -186,7 +189,7 @@ struct DebugDrawEncoder
 };
 
 ///
-void ddBegin(uint16_t _viewId, bgfx::Encoder* _encoder = NULL);
+void ddBegin(uint16_t _viewId, bool _depthTestLess = true, bgfx::Encoder* _encoder = NULL);
 
 ///
 void ddEnd();
@@ -197,6 +200,9 @@ void ddPush();
 ///
 void ddPop();
 
+///
+void ddSetDepthTestLess(bool _depthTestLess);
+
 ///
 void ddSetState(bool _depthTest, bool _depthWrite, bool _clockwise);