Renderer: Add shader validation

Former-commit-id: fa9225b87e6ec2217c3838535531075dfcaaf433

src/Nazara/Renderer/OpenGL.cpp

@@ -945,6 +945,7 @@ bool NzOpenGL::Initialize()
 		glUniformMatrix4fv = reinterpret_cast<PFNGLUNIFORMMATRIX4FVPROC>(LoadEntry("glUniformMatrix4fv"));
 		glUnmapBuffer = reinterpret_cast<PFNGLUNMAPBUFFERPROC>(LoadEntry("glUnmapBuffer"));
 		glUseProgram = reinterpret_cast<PFNGLUSEPROGRAMPROC>(LoadEntry("glUseProgram"));
+		glValidateProgram = reinterpret_cast<PFNGLVALIDATEPROGRAMPROC>(LoadEntry("glValidateProgram"));
 		glVertexAttrib4f = reinterpret_cast<PFNGLVERTEXATTRIB4FPROC>(LoadEntry("glVertexAttrib4f"));
 		glVertexAttribPointer = reinterpret_cast<PFNGLVERTEXATTRIBPOINTERPROC>(LoadEntry("glVertexAttribPointer"));
 		glViewport = reinterpret_cast<PFNGLVIEWPORTPROC>(LoadEntry("glViewport"));
@@ -2384,6 +2385,7 @@ PFNGLUNIFORMMATRIX4DVPROC         glUniformMatrix4dv         = nullptr;
 PFNGLUNIFORMMATRIX4FVPROC         glUniformMatrix4fv         = nullptr;
 PFNGLUNMAPBUFFERPROC              glUnmapBuffer              = nullptr;
 PFNGLUSEPROGRAMPROC               glUseProgram               = nullptr;
+PFNGLVALIDATEPROGRAMPROC          glValidateProgram          = nullptr;
 PFNGLVERTEXATTRIB4FPROC           glVertexAttrib4f           = nullptr;
 PFNGLVERTEXATTRIBDIVISORPROC      glVertexAttribDivisor      = nullptr;
 PFNGLVERTEXATTRIBPOINTERPROC      glVertexAttribPointer      = nullptr;

src/Nazara/Renderer/Renderer.cpp

@@ -1857,6 +1857,14 @@ bool NzRenderer::EnsureStateUpdate()
 	// Et on termine par envoyer nos états au driver
 	NzOpenGL::ApplyStates(s_states);
 
+	#ifdef NAZARA_DEBUG
+	if (!s_shader->Validate())
+	{
+		NazaraError(NzError::GetLastError());
+		return false;
+	}
+	#endif
+
 	return true;
 }
 

src/Nazara/Renderer/Shader.cpp

@@ -748,6 +748,30 @@ void NzShader::SendVectorArray(int location, const NzVector4i* vectors, unsigned
 	}
 }
 
+bool NzShader::Validate() const
+{
+	#if NAZARA_RENDERER_SAFE
+	if (!m_program)
+	{
+		NazaraError("Shader is not initialized");
+		return false;
+	}
+	#endif
+
+	glValidateProgram(m_program);
+
+	GLint success;
+	glGetProgramiv(m_program, GL_VALIDATE_STATUS, &success);
+
+	if (success == GL_TRUE)
+		return true;
+	else
+	{
+		NazaraError("Failed to validate shader: " + GetLog());
+		return false;
+	}
+}
+
 unsigned int NzShader::GetOpenGLID() const
 {
 	return m_program;