From a1653538960c9896d7a9a869fb17af99e0819894 Mon Sep 17 00:00:00 2001
From: bkaradzic <branimirkaradzic@gmail.com>
Date: Fri, 8 Mar 2013 21:54:08 -0800
Subject: [PATCH] Removed fixed function alpha test.

---
 include/bgfx.h         | 14 --------------
 src/renderer_d3d11.cpp |  2 +-
 src/renderer_d3d9.cpp  |  4 +---
 src/renderer_gl.cpp    | 16 +---------------
 4 files changed, 3 insertions(+), 33 deletions(-)

diff --git a/include/bgfx.h b/include/bgfx.h
index 73db1063..f7d3a918 100644
--- a/include/bgfx.h
+++ b/include/bgfx.h
@@ -12,7 +12,6 @@
 ///
 #define BGFX_STATE_DEPTH_WRITE          UINT64_C(0x0000000000000001)
 
-#define BGFX_STATE_ALPHA_TEST           UINT64_C(0x0000000000000004)
 #define BGFX_STATE_ALPHA_WRITE          UINT64_C(0x0000000000000008)
 #define BGFX_STATE_ALPHA_MASK           UINT64_C(0x000000000000000c)
 
@@ -27,17 +26,6 @@
 #define BGFX_STATE_DEPTH_TEST_SHIFT     4
 #define BGFX_STATE_DEPTH_TEST_MASK      UINT64_C(0x00000000000000f0)
 
-#define BGFX_STATE_ALPHA_TEST_LESS      UINT64_C(0x0000000000000100)
-#define BGFX_STATE_ALPHA_TEST_LEQUAL    UINT64_C(0x0000000000000200)
-#define BGFX_STATE_ALPHA_TEST_EQUAL     UINT64_C(0x0000000000000300)
-#define BGFX_STATE_ALPHA_TEST_GEQUAL    UINT64_C(0x0000000000000400)
-#define BGFX_STATE_ALPHA_TEST_GREATER   UINT64_C(0x0000000000000500)
-#define BGFX_STATE_ALPHA_TEST_NOTEQUAL  UINT64_C(0x0000000000000600)
-#define BGFX_STATE_ALPHA_TEST_NEVER     UINT64_C(0x0000000000000700)
-#define BGFX_STATE_ALPHA_TEST_ALWAYS    UINT64_C(0x0000000000000800)
-#define BGFX_STATE_ALPHA_TEST_SHIFT     8
-#define BGFX_STATE_ALPHA_TEST_MASK      UINT64_C(0x0000000000000f00)
-
 #define BGFX_STATE_BLEND_ZERO           UINT64_C(0x0000000000001000)
 #define BGFX_STATE_BLEND_ONE            UINT64_C(0x0000000000002000)
 #define BGFX_STATE_BLEND_SRC_COLOR      UINT64_C(0x0000000000003000)
@@ -719,9 +707,7 @@ namespace bgfx
 	/// @param _state State flags. Default state for primitive type is
 	///   triangles. See: BGFX_STATE_DEFAULT.
 	///
-	///   BGFX_STATE_ALPHA_TEST - Enable alpha test.
 	///   BGFX_STATE_ALPHA_WRITE - Enable alpha write.
-	///   BGFX_STATE_ALPHA_TEST_* - Alpha test function.
 	///   BGFX_STATE_DEPTH_WRITE - Enable depth write.
 	///   BGFX_STATE_DEPTH_TEST_* - Depth test function.
 	///   BGFX_STATE_BLEND_* - See NOTE: BGFX_STATE_BLEND_FUNC.
diff --git a/src/renderer_d3d11.cpp b/src/renderer_d3d11.cpp
index 7eefc506..1c104535 100644
--- a/src/renderer_d3d11.cpp
+++ b/src/renderer_d3d11.cpp
@@ -2193,7 +2193,7 @@ namespace bgfx
 						s_renderCtx.setRasterizerState(newFlags, wireframe);
 					}
 
-					if ( (BGFX_STATE_ALPHA_TEST|BGFX_STATE_ALPHA_REF_MASK) & changedFlags)
+					if (BGFX_STATE_ALPHA_REF_MASK & changedFlags)
 					{
 						uint32_t ref = (newFlags&BGFX_STATE_ALPHA_REF_MASK)>>BGFX_STATE_ALPHA_REF_SHIFT;
 						alphaRef = ref/255.0f;
diff --git a/src/renderer_d3d9.cpp b/src/renderer_d3d9.cpp
index a528f0b0..7023cd46 100644
--- a/src/renderer_d3d9.cpp
+++ b/src/renderer_d3d9.cpp
@@ -2345,12 +2345,10 @@ namespace bgfx
 						}
 					}
 
-					if ( (BGFX_STATE_ALPHA_TEST|BGFX_STATE_ALPHA_REF_MASK) & changedFlags)
+					if (BGFX_STATE_ALPHA_REF_MASK & changedFlags)
 					{
 						uint32_t ref = (newFlags&BGFX_STATE_ALPHA_REF_MASK)>>BGFX_STATE_ALPHA_REF_SHIFT;
 						alphaRef = ref/255.0f;
-						DX_CHECK(device->SetRenderState(D3DRS_ALPHAREF, ref) );
-						DX_CHECK(device->SetRenderState(D3DRS_ALPHATESTENABLE, !!(BGFX_STATE_ALPHA_TEST & newFlags) ) );
 					}
 
 					if ( (BGFX_STATE_PT_POINTS|BGFX_STATE_POINT_SIZE_MASK) & changedFlags)
diff --git a/src/renderer_gl.cpp b/src/renderer_gl.cpp
index 543ae2cf..262d6c73 100644
--- a/src/renderer_gl.cpp
+++ b/src/renderer_gl.cpp
@@ -1848,9 +1848,6 @@ namespace bgfx
 		GL_CHECK(glDisable(GL_CULL_FACE) );
 		GL_CHECK(glDisable(GL_BLEND) );
 		GL_CHECK(glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE) );
-#if BGFX_CONFIG_RENDERER_OPENGL && BGFX_CONFIG_RENDERER_OPENGL < 31
-		GL_CHECK(glDisable(GL_ALPHA_TEST) );
-#endif // BGFX_CONFIG_RENDERER_OPENGL && BGFX_CONFIG_RENDERER_OPENGL
 
 		Program& program = s_renderCtx.m_program[m_program.idx];
 		GL_CHECK(glUseProgram(program.m_id) );
@@ -2495,21 +2492,10 @@ namespace bgfx
 						}
 					}
 
-					if ( (BGFX_STATE_ALPHA_TEST|BGFX_STATE_ALPHA_REF_MASK) & changedFlags)
+					if (BGFX_STATE_ALPHA_REF_MASK & changedFlags)
 					{
 						uint32_t ref = (newFlags&BGFX_STATE_ALPHA_REF_MASK)>>BGFX_STATE_ALPHA_REF_SHIFT;
 						alphaRef = ref/255.0f;
-
-#if BGFX_CONFIG_RENDERER_OPENGL && BGFX_CONFIG_RENDERER_OPENGL < 31
-						if (BGFX_STATE_ALPHA_TEST & newFlags)
-						{
-							GL_CHECK(glEnable(GL_ALPHA_TEST) );
-						}
-						else
-						{
-							GL_CHECK(glDisable(GL_ALPHA_TEST) );
-						}
-#endif // BGFX_CONFIG_RENDERER_OPENGL && BGFX_CONFIG_RENDERER_OPENGL < 31
 					}
 
 #if BGFX_CONFIG_RENDERER_OPENGL