1 files changed, 97 insertions, 0 deletions
diff --git a/src/States_GL.cpp b/src/States_GL.cpp
new file mode 100644
index 0000000..f6e00e9
--- /dev/null
+++ b/src/States_GL.cpp
@@ -0,0 +1,97 @@
+/* 
+* Copyright (c) 2008-2016, NVIDIA CORPORATION. All rights reserved. 
+* 
+* NVIDIA CORPORATION and its licensors retain all intellectual property 
+* and proprietary rights in and to this software, related documentation 
+* and any modifications thereto. Any use, reproduction, disclosure or 
+* distribution of this software and related documentation without an express 
+* license agreement from NVIDIA CORPORATION is strictly prohibited. 
+*/
+
+#include "States_GL.h"
+
+#if SUPPORT_GL
+
+//--------------------------------------------------------------------------------
+void GFSDK::SSAO::GL::States::SetSharedBlendState(const GFSDK_SSAO_GLFunctions& GL)
+{
+#if !USE_GLES
+    GL.glDisable(GL_COLOR_LOGIC_OP);
+#endif
+    GL.glDisable(GL_SAMPLE_COVERAGE);
+    GL.glDisable(GL_SAMPLE_ALPHA_TO_COVERAGE);
+}
+
+//--------------------------------------------------------------------------------
+void GFSDK::SSAO::GL::States::SetBlendStateMultiplyPreserveAlpha(const GFSDK_SSAO_GLFunctions& GL)
+{
+    GL.glColorMaski(0, GL_TRUE, GL_TRUE, GL_TRUE, GL_FALSE);
+    GL.glEnable(GL_BLEND);
+    GL.glBlendEquationSeparate(GL_FUNC_ADD, GL_FUNC_ADD);
+    GL.glBlendFuncSeparate(GL_ZERO, GL_SRC_COLOR, GL_ZERO, GL_ONE);
+    ASSERT_GL_ERROR(GL);
+}
+
+//--------------------------------------------------------------------------------
+void GFSDK::SSAO::GL::States::SetBlendStateDisabledPreserveAlpha(const GFSDK_SSAO_GLFunctions& GL)
+{
+    GL.glColorMaski(0, GL_TRUE, GL_TRUE, GL_TRUE, GL_FALSE);
+    GL.glDisable(GL_BLEND);
+    ASSERT_GL_ERROR(GL);
+}
+
+//--------------------------------------------------------------------------------
+void GFSDK::SSAO::GL::States::SetBlendStateDisabled(const GFSDK_SSAO_GLFunctions& GL)
+{
+    GL.glColorMaski(0, GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+    GL.glDisable(GL_BLEND);
+    ASSERT_GL_ERROR(GL);
+}
+
+//--------------------------------------------------------------------------------
+void GFSDK::SSAO::GL::States::SetDepthStencilStateDisabled(const GFSDK_SSAO_GLFunctions& GL)
+{
+    GL.glDisable(GL_DEPTH_TEST);
+    GL.glDisable(GL_STENCIL_TEST);
+}
+
+//--------------------------------------------------------------------------------
+void GFSDK::SSAO::GL::States::SetRasterizerStateFullscreenNoScissor(const GFSDK_SSAO_GLFunctions& GL)
+{
+    GL.glDisable(GL_CULL_FACE);
+    GL.glPolygonOffset(0.f, 0.f);
+    GL.glDisable(GL_SCISSOR_TEST);
+    GL.glDisable(GL_MULTISAMPLE);
+}
+
+//--------------------------------------------------------------------------------
+void GFSDK::SSAO::GL::States::SetCustomBlendState(const GFSDK_SSAO_GLFunctions& GL, const GFSDK_SSAO_CustomBlendState_GL& CustomBlendState)
+{
+    GL.glEnable(GL_BLEND);
+
+    GL.glBlendEquationSeparate(
+        CustomBlendState.BlendEquationSeparate.ModeRGB,
+        CustomBlendState.BlendEquationSeparate.ModeAlpha);
+
+    GL.glBlendFuncSeparate(
+        CustomBlendState.BlendFuncSeparate.SrcRGB,
+        CustomBlendState.BlendFuncSeparate.DstRGB,
+        CustomBlendState.BlendFuncSeparate.SrcAlpha,
+        CustomBlendState.BlendFuncSeparate.DstAlpha);
+
+    GL.glBlendColor(
+        CustomBlendState.BlendColor.R,
+        CustomBlendState.BlendColor.G,
+        CustomBlendState.BlendColor.B,
+        CustomBlendState.BlendColor.A);
+
+    GL.glColorMaski(0,
+        CustomBlendState.ColorMask.R,
+        CustomBlendState.ColorMask.G,
+        CustomBlendState.ColorMask.B,
+        CustomBlendState.ColorMask.A);
+
+    ASSERT_GL_ERROR(GL);
+}
+
+#endif // SUPPORT_GL