OGL: Add glClipControl support.

Source/Core/VideoBackends/OGL/GLExtensions/ARB_clip_control.h

@@ -0,0 +1,8 @@
+// Copyright 2013 Dolphin Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.
+
+#include "VideoBackends/OGL/GLExtensions/gl_common.h"
+
+extern PFNGLCLIPCONTROLPROC glClipControl;
+

Source/Core/VideoBackends/OGL/GLExtensions/GLExtensions.cpp

@@ -785,6 +785,9 @@ PFNGLENDOCCLUSIONQUERYNVPROC glEndOcclusionQueryNV;
 PFNGLGETOCCLUSIONQUERYIVNVPROC glGetOcclusionQueryivNV;
 PFNGLGETOCCLUSIONQUERYUIVNVPROC glGetOcclusionQueryuivNV;
 
+// ARB_clip_control
+PFNGLCLIPCONTROLPROC glClipControl;
+
 // Creates a GLFunc object that requires a feature
 #define GLFUNC_REQUIRES(x, y) { (void**)&x, #x, y }
 // Creates a GLFunc object with a different function suffix
@@ -1272,6 +1275,9 @@ const GLFunc gl_function_array[] =
 	GLFUNC_REQUIRES(glGetOcclusionQueryivNV,    "GL_NV_occlusion_query_samples"),
 	GLFUNC_REQUIRES(glGetOcclusionQueryuivNV,   "GL_NV_occlusion_query_samples"),
 
+	// ARB_clip_control
+	GLFUNC_REQUIRES(glClipControl, "GL_ARB_clip_control"),
+
 	// gl_1_1
 	// OpenGL 1.1 is at the end due to a bug in Android's EGL stack.
 	// eglGetProcAddress can only return a finite amount of function pointers

Source/Core/VideoBackends/OGL/GLExtensions/GLExtensions.h

@@ -8,6 +8,7 @@
 
 #include "VideoBackends/OGL/GLExtensions/ARB_blend_func_extended.h"
 #include "VideoBackends/OGL/GLExtensions/ARB_buffer_storage.h"
+#include "VideoBackends/OGL/GLExtensions/ARB_clip_control.h"
 #include "VideoBackends/OGL/GLExtensions/ARB_debug_output.h"
 #include "VideoBackends/OGL/GLExtensions/ARB_draw_elements_base_vertex.h"
 #include "VideoBackends/OGL/GLExtensions/ARB_ES2_compatibility.h"

Source/Core/VideoBackends/OGL/OGL.vcxproj

@@ -59,6 +59,7 @@
     <ClInclude Include="FramebufferManager.h" />
     <ClInclude Include="GLExtensions\ARB_blend_func_extended.h" />
     <ClInclude Include="GLExtensions\ARB_buffer_storage.h" />
+    <ClInclude Include="GLExtensions\ARB_clip_control.h" />
     <ClInclude Include="GLExtensions\ARB_debug_output.h" />
     <ClInclude Include="GLExtensions\ARB_draw_elements_base_vertex.h" />
     <ClInclude Include="GLExtensions\ARB_ES2_compatibility.h" />

Source/Core/VideoBackends/OGL/OGL.vcxproj.filters

@@ -199,6 +199,9 @@
     <ClInclude Include="GLInterface\WGL.h">
       <Filter>GLInterface</Filter>
     </ClInclude>
+    <ClInclude Include="GLExtensions\ARB_clip_control.h">
+      <Filter>GLExtensions</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <Text Include="CMakeLists.txt" />

Source/Core/VideoBackends/OGL/Render.cpp

@@ -480,12 +480,13 @@ Renderer::Renderer()
 	                                     GLExtensions::Supports("GL_EXT_draw_elements_base_vertex") ||
 	                                     GLExtensions::Supports("GL_OES_draw_elements_base_vertex");
 	g_ogl_config.bSupportsGLBufferStorage = GLExtensions::Supports("GL_ARB_buffer_storage") ||
-	                                        GLExtensions::Supports("GL_EXT_buffer_storage");;
+	                                        GLExtensions::Supports("GL_EXT_buffer_storage");
 	g_ogl_config.bSupportsMSAA = GLExtensions::Supports("GL_ARB_texture_multisample");
 	g_ogl_config.bSupportSampleShading = GLExtensions::Supports("GL_ARB_sample_shading");
 	g_ogl_config.bSupportOGL31 = GLExtensions::Version() >= 310;
 	g_ogl_config.bSupportViewportFloat = GLExtensions::Supports("GL_ARB_viewport_array");
 	g_ogl_config.bSupportsDebug = GLExtensions::Supports("GL_KHR_debug") || GLExtensions::Supports("GL_ARB_debug_output");
+	g_ogl_config.bSupportsGLClipControl = GLExtensions::Supports("GL_ARB_clip_control");
 
 	if (GLInterface->GetMode() == GLInterfaceMode::MODE_OPENGLES3)
 	{
@@ -585,7 +586,7 @@ Renderer::Renderer()
 				g_ogl_config.gl_renderer,
 				g_ogl_config.gl_version), 5000);
 
-	WARN_LOG(VIDEO,"Missing OGL Extensions: %s%s%s%s%s%s%s%s%s%s%s",
+	WARN_LOG(VIDEO,"Missing OGL Extensions: %s%s%s%s%s%s%s%s%s%s%s%s",
 			g_ActiveConfig.backend_info.bSupportsDualSourceBlend ? "" : "DualSourceBlend ",
 			g_ActiveConfig.backend_info.bSupportsPrimitiveRestart ? "" : "PrimitiveRestart ",
 			g_ActiveConfig.backend_info.bSupportsEarlyZ ? "" : "EarlyZ ",
@@ -596,7 +597,8 @@ Renderer::Renderer()
 			g_ogl_config.bSupportsGLSync ? "" : "Sync ",
 			g_ogl_config.bSupportsMSAA ? "" : "MSAA ",
 			g_ogl_config.bSupportSampleShading ? "" : "SSAA ",
-			g_ActiveConfig.backend_info.bSupportsGSInstancing ? "" : "GSInstancing "
+			g_ActiveConfig.backend_info.bSupportsGSInstancing ? "" : "GSInstancing ",
+			g_ogl_config.bSupportsGLClipControl ? "" : "ClipControl "
 			);
 
 	s_last_multisample_mode = g_ActiveConfig.iMultisampleMode;
@@ -644,6 +646,8 @@ Renderer::Renderer()
 	glDisable(GL_STENCIL_TEST);
 	glEnable(GL_SCISSOR_TEST);
 
+	if (g_ogl_config.bSupportsGLClipControl)
+		glClipControl(GL_LOWER_LEFT, GL_ZERO_TO_ONE);
 	glScissor(0, 0, GetTargetWidth(), GetTargetHeight());
 	glBlendColor(0, 0, 0, 0.5f);
 	glClearDepthf(1.0f);

Source/Core/VideoBackends/OGL/Render.h

@@ -25,6 +25,7 @@ struct VideoConfig
 	bool bSupportsGLSync;
 	bool bSupportsGLBaseVertex;
 	bool bSupportsGLBufferStorage;
+	bool bSupportsGLClipControl;
 	bool bSupportsMSAA;
 	bool bSupportSampleShading;
 	GLSL_VERSION eSupportedGLSLVersion;