OpenGLRenderer: Take advantage of glClipControl if available

include/Nazara/OpenGLRenderer/Wrapper/Context.hpp

@@ -52,7 +52,10 @@ namespace Nz::GL
 
 	enum class Extension
 	{
+		ClipControl,
+		DebugOutput,
 		DepthClamp,
+		PolygonMode,
 		SpirV,
 		StorageBuffers,
 		TextureCompressionS3tc,
@@ -149,6 +152,8 @@ namespace Nz::GL
 			inline bool IsExtensionSupported(Extension extension) const;
 			inline bool IsExtensionSupported(const std::string& extension) const;
 
+			inline bool HasZeroToOneDepth() const;
+
 			bool Initialize(const ContextParams& params);
 
 			inline void NotifyBufferDestruction(GLuint buffer) const;
@@ -253,6 +258,7 @@ namespace Nz::GL
 			mutable State m_state;
 			mutable bool m_didCollectErrors;
 			mutable bool m_hadAnyError;
+			bool m_hasZeroToOneDepth;
 	};
 }
 

include/Nazara/OpenGLRenderer/Wrapper/Context.inl

@@ -51,6 +51,11 @@ namespace Nz::GL
 		return m_supportedExtensions.find(extension) != m_supportedExtensions.end();
 	}
 
+	inline bool Context::HasZeroToOneDepth() const
+	{
+		return m_hasZeroToOneDepth;
+	}
+
 	inline void Context::NotifyBufferDestruction(GLuint buffer) const
 	{
 		for (GLuint& boundBuffer : m_state.bufferTargets)

include/Nazara/OpenGLRenderer/Wrapper/CoreFunctions.hpp

@@ -13,7 +13,7 @@
 #include <GLES3/gl32.h>
 #include <GLES2/gl2ext.h>
 
-// Define some OpenGL (not ES) extensions
+// Define some OpenGL (not ES) defines/function types
 #define GL_POINT                           0x1B00
 #define GL_LINE                            0x1B01
 #define GL_FILL                            0x1B02
@@ -22,8 +22,21 @@
 #define GL_TEXTURE_CUBE_MAP_SEAMLESS       0x884F
 typedef void (GL_APIENTRYP PFNGLDRAWBUFFERPROC) (GLenum buf);
 typedef void (GL_APIENTRYP PFNGLPOLYGONMODEPROC) (GLenum face, GLenum mode);
+
+// Clip control (OpenGL 4.5)
+#define GL_LOWER_LEFT                      0x8CA1
+#define GL_UPPER_LEFT                      0x8CA2
+#define GL_NEGATIVE_ONE_TO_ONE             0x935E
+#define GL_ZERO_TO_ONE                     0x935F
+#define GL_CLIP_ORIGIN                     0x935C
+#define GL_CLIP_DEPTH_MODE                 0x935D
+typedef void (GL_APIENTRYP PFNGLCLIPCONTROLPROC) (GLenum origin, GLenum depth);
+
+// SPIR-V shaders (OpenGL 4.6)
 typedef void (GL_APIENTRYP PFNGLSPECIALIZESHADERPROC) (GLuint shader, const GLchar* pEntryPoint, GLuint numSpecializationConstants, const GLuint* pConstantIndex, const GLuint* pConstantValue);
 
+/*** Functions ***/
+
 // OpenGL core
 #define NAZARA_OPENGLRENDERER_FOREACH_GLES_FUNC(cb, extCb) \
 	cb(glActiveTexture, PFNGLACTIVETEXTUREPROC) \
@@ -183,6 +196,8 @@ typedef void (GL_APIENTRYP PFNGLSPECIALIZESHADERPROC) (GLuint shader, const GLch
 	extCb(glObjectLabel, PFNGLOBJECTLABELPROC) \
 	extCb(glPopDebugGroup, PFNGLPOPDEBUGGROUPPROC) \
 	extCb(glPushDebugGroup, PFNGLPUSHDEBUGGROUPPROC) \
+	/* OpenGL 4.5 - GL_ARB_clip_control/GL_EXT_clip_control */ \
+	extCb(glClipControl, PFNGLCLIPCONTROLPROC) \
 	/* OpenGL 4.6 - GL_ARB_spirv_extensions */\
 	extCb(glSpecializeShader, PFNGLSPECIALIZESHADERPROC) \