- alternative configuration using GLEW to get extension functions. This requires GL 2.0, though so it won't be promoted to the mainline for the time being.

- removed all pre GL 2.0 support.

src/CMakeLists.txt

@@ -238,6 +238,30 @@ endif( NOT OPENGL_GLU_FOUND )
 set( ZDOOM_LIBS ${ZDOOM_LIBS} ${OPENGL_LIBRARIES} )
 include_directories( ${OPENGL_INCLUDE_DIR} )
 
+
+# check for GLEW
+find_path( GLEW_INCLUDE_DIR GL/glew.h
+	PATHS "/usr/include"
+	"/usr/local/include" )
+
+if( GLEW_INCLUDE_DIR )
+	message( STATUS "GLEW include files found at ${GLEW_INCLUDE_DIR}" )
+else( GLEW_INCLUDE_DIR )
+	message( SEND_ERROR "Could not find GLEW include files" )
+endif( GLEW_INCLUDE_DIR )
+
+# GLEW include directory
+include_directories( "${GLEW_INCLUDE_DIR}" )
+
+find_library( GLEW_LIBRARY glew32 )
+
+if( NOT GLEW_LIBRARY )
+	message( SEND_ERROR "Could not find GLEW library files" )
+endif( NOT GLEW_LIBRARY )
+	
+set( ZDOOM_LIBS ${ZDOOM_LIBS} ${GLEW_LIBRARY} )
+
+
 # Decide on the name of the FMOD library we want to use.
 
 if( NOT FMOD_LIB_NAME AND MSVC )
@@ -395,20 +419,6 @@ if( NOT NO_ASM )
 	ENDMACRO( ADD_ASM_FILE )
 endif( NOT NO_ASM )
 
-# OpenGL on OS X: Search for GLEW include files
-
-if( APPLE )
-	find_path( GLEW_INCLUDE_DIR GL/glew.h
-		PATHS "/usr/include"
-		"/usr/local/include" )
-
-	if( GLEW_INCLUDE_DIR )
-		message( STATUS "GLEW include files found at ${GLEW_INCLUDE_DIR}" )
-	else( GLEW_INCLUDE_DIR )
-		message( SEND_ERROR "Could not find GLEW include files" )
-	endif( GLEW_INCLUDE_DIR )
-endif( APPLE )
-
 # Decide on SSE setup
 
 set( SSE_MATTERS NO )
@@ -565,12 +575,6 @@ else( NOT DYN_FLUIDSYNTH )
 	set( ZDOOM_LIBS ${ZDOOM_LIBS} ${CMAKE_DL_LIBS} )
 endif( NOT DYN_FLUIDSYNTH )
 
-# OpenGL on OS X: GLEW include directory
-
-if( APPLE )
-	include_directories( "${GLEW_INCLUDE_DIR}" )
-endif( APPLE )
-
 # Start defining source files for ZDoom
 set( PLAT_WIN32_SOURCES
 	win32/eaxedit.cpp

src/gl/api/gl_api.h

@@ -7,6 +7,7 @@
 #define __EXTERN extern
 #endif
 
+#if 0
 __EXTERN PFNGLBLENDEQUATIONPROC glBlendEquation;
 
 // ARB_SHADER_OBJECTS
@@ -98,3 +99,5 @@ __EXTERN PFNGLFRAMEBUFFERRENDERBUFFERPROC glFramebufferRenderbuffer;
 __EXTERN PFNGLTEXBUFFERARBPROC glTexBufferARB;
 
 #undef __EXTERN
+
+#endif

src/gl/data/gl_vertexbuffer.cpp

@@ -51,7 +51,7 @@
 
 CUSTOM_CVAR(Int, gl_usevbo, -1, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_NOINITCALL)
 {
-	if (self < -1 || self > 2 || !(gl.flags&RFL_VBO))
+	if (self < -1 || self > 2)
 	{
 		self = 0;
 	}
@@ -75,11 +75,8 @@ CUSTOM_CVAR(Int, gl_usevbo, -1, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_NOINITCA
 FVertexBuffer::FVertexBuffer()
 {
 	vbo_id = 0;
-	if (gl.flags&RFL_VBO)
-	{
 	if (gl_usevbo == -1) gl_usevbo.Callback();
 	glGenBuffers(1, &vbo_id);
-	}
 }
 	
 FVertexBuffer::~FVertexBuffer()
@@ -99,14 +96,7 @@ FVertexBuffer::~FVertexBuffer()
 FFlatVertexBuffer::FFlatVertexBuffer()
 : FVertexBuffer()
 {
-	if (!(gl.flags&RFL_VBO)) 
-	{
-		vbo_arg = 0;
-	}
-	else
-	{
 	vbo_arg = gl_usevbo;
-	}
 	map = NULL;
 }
 

src/gl/models/gl_voxels.cpp

@@ -232,8 +232,6 @@ public:
 FVoxelVertexBuffer::FVoxelVertexBuffer(TArray<FVoxelVertex> &verts, TArray<unsigned int> &indices)
 {
 	ibo_id = 0;
-	if (gl.flags&RFL_VBO)
-	{
 	glGenBuffers(1, &ibo_id);
 
 	glBindBuffer(GL_ARRAY_BUFFER, vbo_id);
@@ -255,7 +253,6 @@ FVoxelVertexBuffer::FVoxelVertexBuffer(TArray<FVoxelVertex> &verts, TArray<unsig
 		delete [] sbuffer;
 		isint = false;
 	}
-	}
 }
 
 //===========================================================================
@@ -470,10 +467,7 @@ bool FVoxelModel::Load(const char * fn, int lumpnum, const char * buffer, int le
 
 void FVoxelModel::MakeGLData()
 {
-	if (gl.flags&RFL_VBO)
-	{
 	mVBO = new FVoxelVertexBuffer(mVertices, mIndices);
-	}
 }
 
 //===========================================================================
@@ -514,8 +508,6 @@ void FVoxelModel::RenderFrame(FTexture * skin, int frame, int cm, int translatio
 	tex->Bind(cm, 0, translation);
 	gl_RenderState.Apply();
 
-	if (gl.flags&RFL_VBO)
-	{
 	if (mVBO == NULL) MakeGLData();
 	if (mVBO != NULL)
 	{
@@ -524,7 +516,6 @@ void FVoxelModel::RenderFrame(FTexture * skin, int frame, int cm, int translatio
 		GLRenderer->mVBO->BindVBO();
 		return;
 	}
-	}
 
 	glBegin(GL_QUADS);
 	for(unsigned i=0;i < mIndices.Size(); i++)

src/gl/scene/gl_portal.cpp

@@ -198,8 +198,6 @@ bool GLPortal::Start(bool usestencil, bool doquery)
 			else if (gl_noquery) doquery = false;
 			
 			// If occlusion query is supported let's use it to avoid rendering portals that aren't visible
-			if (doquery && gl.flags&RFL_OCCLUSION_QUERY)
-			{
 			if (!QueryObject) glGenQueries(1, &QueryObject);
 			if (QueryObject) 
 			{
@@ -207,14 +205,9 @@ bool GLPortal::Start(bool usestencil, bool doquery)
 			}
 			else doquery = false;	// some kind of error happened
 
-			}
-
 			DrawPortalStencil();
 
-			if (doquery && gl.flags&RFL_OCCLUSION_QUERY)
-			{
 			glEndQuery(GL_SAMPLES_PASSED_ARB);
-			}
 
 			// Clear Z-buffer
 			glStencilFunc(GL_EQUAL,recursion+1,~0);		// draw sky into stencil
@@ -230,8 +223,6 @@ bool GLPortal::Start(bool usestencil, bool doquery)
 			glColorMask(1,1,1,1);
 			glDepthRange(0,1);
 
-			if (doquery && gl.flags&RFL_OCCLUSION_QUERY)
-			{
 			GLuint sampleCount;
 
 			glGetQueryObjectuiv(QueryObject, GL_QUERY_RESULT_ARB, &sampleCount);
@@ -244,7 +235,6 @@ bool GLPortal::Start(bool usestencil, bool doquery)
 				PortalAll.Unclock();
 				return false;
 			}
-			}
 			FDrawInfo::StartDrawInfo();
 		}
 		else

src/gl/scene/gl_scene.cpp

@@ -247,13 +247,36 @@ void FGLRenderer::SetCameraPos(fixed_t viewx, fixed_t viewy, fixed_t viewz, angl
 //
 //-----------------------------------------------------------------------------
 
+static void setPerspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar)
+{
+	GLdouble m[4][4];
+	double sine, cotangent, deltaZ;
+	double radians = fovy / 2 * M_PI / 180;
+
+	deltaZ = zFar - zNear;
+	sine = sin(radians);
+	if ((deltaZ == 0) || (sine == 0) || (aspect == 0)) {
+		return;
+	}
+	cotangent = cos(radians) / sine;
+
+	memset(m, 0, sizeof(m));
+	m[0][0] = cotangent / aspect;
+	m[1][1] = cotangent;
+	m[2][2] = -(zFar + zNear) / deltaZ;
+	m[2][3] = -1;
+	m[3][2] = -2 * zNear * zFar / deltaZ;
+	m[3][3] = 0;
+	glLoadMatrixd(&m[0][0]);
+}
+
+
 void FGLRenderer::SetProjection(float fov, float ratio, float fovratio)
 {
 	glMatrixMode(GL_PROJECTION);
-	glLoadIdentity();
 
 	float fovy = 2 * RAD2DEG(atan(tan(DEG2RAD(fov) / 2) / fovratio));
-	gluPerspective(fovy, ratio, 5.f, 65536.f);
+	setPerspective(fovy, ratio, 5.f, 65536.f);
 	gl_RenderState.Set2DMode(false);
 }
 

src/gl/scene/gl_sprite.cpp

@@ -584,8 +584,6 @@ void GLSprite::Process(AActor* thing,sector_t * sector)
 		gltexture=FMaterial::ValidateTexture(patch, false);
 		if (!gltexture) return;
 
-		if (gl.flags & RFL_NPOT_TEXTURE)	// trimming only works if non-power-of-2 textures are supported
-		{
 		vt = gltexture->GetSpriteVT();
 		vb = gltexture->GetSpriteVB();
 		gltexture->GetRect(&r, GLUSE_SPRITE);
@@ -600,24 +598,6 @@ void GLSprite::Process(AActor* thing,sector_t * sector)
 			ul = gltexture->GetSpriteUR();
 			ur = gltexture->GetSpriteUL();
 		}
-		}
-		else
-		{
-			vt = gltexture->GetVT();
-			vb = gltexture->GetVB();
-			gltexture->GetRect(&r, GLUSE_PATCH);
-			if (mirror)
-			{
-				r.left=-r.width-r.left;	// mirror the sprite's x-offset
-				ul = gltexture->GetUL();
-				ur = gltexture->GetUR();
-			}
-			else
-			{
-				ul = gltexture->GetUR();
-				ur = gltexture->GetUL();
-			}
-		}
 
 		r.Scale(FIXED2FLOAT(spritescaleX),FIXED2FLOAT(spritescaleY));
 

src/gl/shaders/gl_shader.cpp

@@ -164,7 +164,7 @@ bool FShader::Load(const char * name, const char * vert_prog_lump, const char *
 			error << "Linking:\n" << buffer << "\n";
 		}
 		int linked;
-		glGetObjectParameteriv(hShader, GL_LINK_STATUS, &linked);
+		glGetShaderiv(hShader, GL_LINK_STATUS, &linked);
 		if (linked == 0)
 		{
 			// only print message if there's an error.

src/gl/system/gl_framebuffer.cpp

@@ -118,6 +118,11 @@ void OpenGLFrameBuffer::InitializeState()
 {
 	static bool first=true;
 
+	if (first)
+	{
+		glewInit();
+	}
+
 	gl_LoadExtensions();
 	Super::InitializeState();
 	if (first)
@@ -128,14 +133,6 @@ void OpenGLFrameBuffer::InitializeState()
 		gl_PrintStartupLog();
 #endif
 
-		if (gl.flags&RFL_NPOT_TEXTURE)
-		{
-			Printf("Support for non power 2 textures enabled.\n");
-		}
-		if (gl.flags&RFL_OCCLUSION_QUERY)
-		{
-			Printf("Occlusion query enabled.\n");
-		}
 	}
 	glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
 	glClearDepth(1.0f);

src/gl/system/gl_interface.cpp

@@ -126,7 +126,6 @@ static bool CheckExtension(const char *ext)
 static void InitContext()
 {
 	gl.flags=0;
-	glBlendEquation = glBlendEquationDummy;
 }
 
 //==========================================================================
@@ -143,15 +142,9 @@ void gl_LoadExtensions()
 	const char *version = (const char*)glGetString(GL_VERSION);
 
 	// Don't even start if it's lower than 1.3
-	if (strcmp(version, "1.3") < 0) 
+	if (strcmp(version, "2.0") < 0) 
 	{
-		I_FatalError("Unsupported OpenGL version.\nAt least GL 1.3 is required to run " GAMENAME ".\n");
+		I_FatalError("Unsupported OpenGL version.\nAt least GL 2.0 is required to run " GAMENAME ".\n");
-	}
-	else if (strcmp(version, "1.4") < 0) 
-	{
-		// The engine will still assume 1.4 but the only 1.4 feature being used is GL_GENERATE_MIPMAP which should be supported as an extension
-		// on most 1.3 cards this is present but let's print a warning that not everything may work as intended.
-		Printf(TEXTCOLOR_RED "The current graphics driver implements a OpenGL version lower than 1.4 and may not support all features " GAMENAME " requires.\n");
 	}
 
 	// This loads any function pointers and flags that require a vaild render context to
@@ -160,14 +153,6 @@ void gl_LoadExtensions()
 	gl.shadermodel = 0;	// assume no shader support
 	gl.vendorstring=(char*)glGetString(GL_VENDOR);
 
-	// First try the regular function
-	glBlendEquation = (PFNGLBLENDEQUATIONPROC)wglGetProcAddress("glBlendEquation");
-	// If that fails try the EXT version
-	if (!glBlendEquation) glBlendEquation = (PFNGLBLENDEQUATIONPROC)wglGetProcAddress("glBlendEquationEXT");
-	// If that fails use a no-op dummy
-	if (!glBlendEquation) glBlendEquation = glBlendEquationDummy;
-
-	if (CheckExtension("GL_ARB_texture_non_power_of_two")) gl.flags|=RFL_NPOT_TEXTURE;
 	if (CheckExtension("GL_ARB_texture_compression")) gl.flags|=RFL_TEXTURE_COMPRESSION;
 	if (CheckExtension("GL_EXT_texture_compression_s3tc")) gl.flags|=RFL_TEXTURE_COMPRESSION_S3TC;
 	if (strstr(gl.vendorstring, "NVIDIA")) gl.flags|=RFL_NVIDIA;
@@ -182,65 +167,6 @@ void gl_LoadExtensions()
 	
 	if (gl.flags & RFL_GL_20)
 	{
-		glDeleteShader = (PFNGLDELETESHADERPROC)myGetProcAddress("glDeleteShader");
-		glDeleteProgram = (PFNGLDELETEPROGRAMPROC)myGetProcAddress("glDeleteProgram");
-		glDetachShader = (PFNGLDETACHSHADERPROC)myGetProcAddress("glDetachShader");
-		glCreateShader = (PFNGLCREATESHADERPROC)myGetProcAddress("glCreateShader");
-		glShaderSource = (PFNGLSHADERSOURCEPROC)myGetProcAddress("glShaderSource");
-		glCompileShader = (PFNGLCOMPILESHADERPROC)myGetProcAddress("glCompileShader");
-		glCreateProgram = (PFNGLCREATEPROGRAMPROC)myGetProcAddress("glCreateProgram");
-		glAttachShader = (PFNGLATTACHSHADERPROC)myGetProcAddress("glAttachShader");
-		glLinkProgram = (PFNGLLINKPROGRAMPROC)myGetProcAddress("glLinkProgram");
-		glUseProgram = (PFNGLUSEPROGRAMPROC)myGetProcAddress("glUseProgram");
-		glValidateProgram = (PFNGLVALIDATEPROGRAMPROC)myGetProcAddress("glValidateProgram");
-
-		glVertexAttrib1f = (PFNGLVERTEXATTRIB1FPROC)myGetProcAddress("glVertexAttrib1f");
-		glVertexAttrib2f = (PFNGLVERTEXATTRIB2FPROC)myGetProcAddress("glVertexAttrib2f");
-		glVertexAttrib4f = (PFNGLVERTEXATTRIB4FPROC)myGetProcAddress("glVertexAttrib4f");
-		glVertexAttrib2fv = (PFNGLVERTEXATTRIB4FVPROC)myGetProcAddress("glVertexAttrib2fv");
-		glVertexAttrib3fv = (PFNGLVERTEXATTRIB4FVPROC)myGetProcAddress("glVertexAttrib3fv");
-		glVertexAttrib4fv = (PFNGLVERTEXATTRIB4FVPROC)myGetProcAddress("glVertexAttrib4fv");
-		glVertexAttrib4ubv = (PFNGLVERTEXATTRIB4UBVPROC)myGetProcAddress("glVertexAttrib4ubv");
-		glGetAttribLocation = (PFNGLGETATTRIBLOCATIONPROC)myGetProcAddress("glGetAttribLocation");
-		glBindAttribLocation = (PFNGLBINDATTRIBLOCATIONPROC)myGetProcAddress("glBindAttribLocation");
-
-
-		glUniform1f = (PFNGLUNIFORM1FPROC)myGetProcAddress("glUniform1f");
-		glUniform2f = (PFNGLUNIFORM2FPROC)myGetProcAddress("glUniform2f");
-		glUniform3f = (PFNGLUNIFORM3FPROC)myGetProcAddress("glUniform3f");
-		glUniform4f = (PFNGLUNIFORM4FPROC)myGetProcAddress("glUniform4f");
-		glUniform1i = (PFNGLUNIFORM1IPROC)myGetProcAddress("glUniform1i");
-		glUniform2i = (PFNGLUNIFORM2IPROC)myGetProcAddress("glUniform2i");
-		glUniform3i = (PFNGLUNIFORM3IPROC)myGetProcAddress("glUniform3i");
-		glUniform4i = (PFNGLUNIFORM4IPROC)myGetProcAddress("glUniform4i");
-		glUniform1fv = (PFNGLUNIFORM1FVPROC)myGetProcAddress("glUniform1fv");
-		glUniform2fv = (PFNGLUNIFORM2FVPROC)myGetProcAddress("glUniform2fv");
-		glUniform3fv = (PFNGLUNIFORM3FVPROC)myGetProcAddress("glUniform3fv");
-		glUniform4fv = (PFNGLUNIFORM4FVPROC)myGetProcAddress("glUniform4fv");
-		glUniform1iv = (PFNGLUNIFORM1IVPROC)myGetProcAddress("glUniform1iv");
-		glUniform2iv = (PFNGLUNIFORM2IVPROC)myGetProcAddress("glUniform2iv");
-		glUniform3iv = (PFNGLUNIFORM3IVPROC)myGetProcAddress("glUniform3iv");
-		glUniform4iv = (PFNGLUNIFORM4IVPROC)myGetProcAddress("glUniform4iv");
-		
-		glUniformMatrix2fv = (PFNGLUNIFORMMATRIX2FVPROC)myGetProcAddress("glUniformMatrix2fv");
-		glUniformMatrix3fv = (PFNGLUNIFORMMATRIX3FVPROC)myGetProcAddress("glUniformMatrix3fv");
-		glUniformMatrix4fv = (PFNGLUNIFORMMATRIX4FVPROC)myGetProcAddress("glUniformMatrix4fv");
-		
-		glGetProgramInfoLog = (PFNGLGETPROGRAMINFOLOGPROC)myGetProcAddress("glGetProgramInfoLog");
-		glGetShaderInfoLog = (PFNGLGETSHADERINFOLOGPROC)myGetProcAddress("glGetShaderInfoLog");
-		glGetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC)myGetProcAddress("glGetUniformLocation");
-		glGetActiveUniform = (PFNGLGETACTIVEUNIFORMPROC)myGetProcAddress("glGetActiveUniform");
-		glGetUniformfv = (PFNGLGETUNIFORMFVPROC)myGetProcAddress("glGetUniformfv");
-		glGetUniformiv = (PFNGLGETUNIFORMIVPROC)myGetProcAddress("glGetUniformiv");
-		glGetShaderSource = (PFNGLGETSHADERSOURCEPROC)myGetProcAddress("glGetShaderSource");
-
-		glEnableVertexAttribArray = (PFNGLENABLEVERTEXATTRIBARRAYPROC)myGetProcAddress("glEnableVertexAttribArray");
-		glDisableVertexAttribArray= (PFNGLDISABLEVERTEXATTRIBARRAYPROC)myGetProcAddress("glDisableVertexAttribArray");
-		glVertexAttribPointer		= (PFNGLVERTEXATTRIBPOINTERPROC)myGetProcAddress("glVertexAttribPointer");
-
-		// what'S the equivalent of this in GL 2.0???
-		glGetObjectParameteriv = (PFNGLGETOBJECTPARAMETERIVARBPROC)myGetProcAddress("glGetObjectParameterivARB");
-
 		// Rules:
 		// SM4 will always use shaders. No option to switch them off is needed here.
 		// SM3 has shaders optional but they are off by default (they will have a performance impact
@@ -258,78 +184,16 @@ void gl_LoadExtensions()
 		else if (Args->CheckParm("-sm3") && gl.shadermodel > 3) gl.shadermodel = 3;
 	}
 
-	if (CheckExtension("GL_ARB_occlusion_query"))
-	{
-        glGenQueries         = (PFNGLGENQUERIESARBPROC)myGetProcAddress("glGenQueriesARB");
-        glDeleteQueries      = (PFNGLDELETEQUERIESARBPROC)myGetProcAddress("glDeleteQueriesARB");
-        glGetQueryObjectuiv  = (PFNGLGETQUERYOBJECTUIVARBPROC)myGetProcAddress("glGetQueryObjectuivARB");
-        glBeginQuery         = (PFNGLBEGINQUERYARBPROC)myGetProcAddress("glBeginQueryARB");
-        glEndQuery           = (PFNGLENDQUERYPROC)myGetProcAddress("glEndQueryARB");
-		gl.flags|=RFL_OCCLUSION_QUERY;
-	}
-
-	if (gl.flags & RFL_GL_21)
-	{
-		glBindBuffer			= (PFNGLBINDBUFFERPROC)myGetProcAddress("glBindBuffer");
-		glDeleteBuffers			= (PFNGLDELETEBUFFERSPROC)myGetProcAddress("glDeleteBuffers");
-		glGenBuffers			= (PFNGLGENBUFFERSPROC)myGetProcAddress("glGenBuffers");
-		glBufferData			= (PFNGLBUFFERDATAPROC)myGetProcAddress("glBufferData");
-		glBufferSubData			= (PFNGLBUFFERSUBDATAPROC)myGetProcAddress("glBufferSubData");
-		glMapBuffer				= (PFNGLMAPBUFFERPROC)myGetProcAddress("glMapBuffer");
-		glUnmapBuffer			= (PFNGLUNMAPBUFFERPROC)myGetProcAddress("glUnmapBuffer");
-		gl.flags |= RFL_VBO;
-	}
-	else if (CheckExtension("GL_ARB_vertex_buffer_object"))
-	{
-		glBindBuffer			= (PFNGLBINDBUFFERPROC)myGetProcAddress("glBindBufferARB");
-		glDeleteBuffers			= (PFNGLDELETEBUFFERSPROC)myGetProcAddress("glDeleteBuffersARB");
-		glGenBuffers			= (PFNGLGENBUFFERSPROC)myGetProcAddress("glGenBuffersARB");
-		glBufferData			= (PFNGLBUFFERDATAPROC)myGetProcAddress("glBufferDataARB");
-		glBufferSubData			= (PFNGLBUFFERSUBDATAPROC)myGetProcAddress("glBufferSubDataARB");
-		glMapBuffer				= (PFNGLMAPBUFFERPROC)myGetProcAddress("glMapBufferARB");
-		glUnmapBuffer			= (PFNGLUNMAPBUFFERPROC)myGetProcAddress("glUnmapBufferARB");
-		gl.flags |= RFL_VBO;
-	}
-
 	if (CheckExtension("GL_ARB_map_buffer_range")) 
 	{
-		glMapBufferRange			= (PFNGLMAPBUFFERRANGEPROC)myGetProcAddress("glMapBufferRange");
-		glFlushMappedBufferRange	= (PFNGLFLUSHMAPPEDBUFFERRANGEPROC)myGetProcAddress("glFlushMappedBufferRange");
 		gl.flags|=RFL_MAP_BUFFER_RANGE;
 	}
 
-	if (CheckExtension("GL_ARB_framebuffer_object"))
+	if (gl.flags & RFL_GL_30)
 	{
-		glGenFramebuffers			= (PFNGLGENFRAMEBUFFERSPROC)myGetProcAddress("glGenFramebuffers");
-		glDeleteFramebuffers		= (PFNGLDELETEFRAMEBUFFERSPROC)myGetProcAddress("glDeleteFramebuffers");
-		glBindFramebuffer			= (PFNGLBINDFRAMEBUFFERPROC)myGetProcAddress("glBindFramebuffer");
-		glFramebufferTexture2D		= (PFNGLFRAMEBUFFERTEXTURE2DPROC)myGetProcAddress("glFramebufferTexture2D");
-		glGenRenderbuffers			= (PFNGLGENRENDERBUFFERSPROC)myGetProcAddress("glGenRenderbuffers");
-		glDeleteRenderbuffers		= (PFNGLDELETERENDERBUFFERSPROC)myGetProcAddress("glDeleteRenderbuffers");
-		glBindRenderbuffer			= (PFNGLBINDRENDERBUFFERPROC)myGetProcAddress("glBindRenderbuffer");
-		glRenderbufferStorage		= (PFNGLRENDERBUFFERSTORAGEPROC)myGetProcAddress("glRenderbufferStorage");
-		glFramebufferRenderbuffer	= (PFNGLFRAMEBUFFERRENDERBUFFERPROC)myGetProcAddress("glFramebufferRenderbuffer");
-
 		gl.flags|=RFL_FRAMEBUFFER;
 	}
 
-#if 0
-	if (CheckExtension("GL_ARB_texture_buffer_object") && 
-		CheckExtension("GL_ARB_texture_float") && 
-		CheckExtension("GL_EXT_GPU_Shader4") && 
-		CheckExtension("GL_ARB_texture_rg") && 
-		gl.shadermodel == 4)
-	{
-		glTexBufferARB = (PFNGLTEXBUFFERARBPROC)myGetProcAddress("glTexBufferARB");
-		gl.flags|=RFL_TEXTUREBUFFER;
-	}
-#endif
-
-
-
-	glActiveTexture = (PFNGLACTIVETEXTUREPROC)myGetProcAddress("glActiveTextureARB");
-	glMultiTexCoord2f = (PFNGLMULTITEXCOORD2FPROC) myGetProcAddress("glMultiTexCoord2fARB");
-	glMultiTexCoord2fv = (PFNGLMULTITEXCOORD2FVPROC) myGetProcAddress("glMultiTexCoord2fvARB");
 }
 
 //==========================================================================
@@ -347,6 +211,8 @@ void gl_PrintStartupLog()
 	Printf ("GL_EXTENSIONS: %s\n", glGetString(GL_EXTENSIONS));
 	int v;
 
+	glGetIntegerv(GL_MAX_TEXTURE_SIZE, &v);
+	Printf("Max. texture size: %d\n", v);
 	glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &v);
 	Printf ("Max. texture units: %d\n", v);
 	glGetIntegerv(GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, &v);

src/gl/system/gl_interface.h

@@ -5,13 +5,10 @@
 
 enum RenderFlags
 {
-	RFL_NPOT_TEXTURE=1,
-	RFL_OCCLUSION_QUERY=4,
 	// [BB] Added texture compression flags.
 	RFL_TEXTURE_COMPRESSION=8,
 	RFL_TEXTURE_COMPRESSION_S3TC=16,
 
-	RFL_VBO = 32,
 	RFL_MAP_BUFFER_RANGE = 64,
 	RFL_FRAMEBUFFER = 128,
 	RFL_TEXTUREBUFFER = 256,

src/gl/system/gl_system.h

@@ -67,22 +67,21 @@
 #include <fcntl.h>
 
 //GL headers
+#include <GL/glew.h>
+
 #if defined(__APPLE__)
-#include <GL/glew.h>
+	#include <OpenGL/OpenGL.h>
-#include <OpenGL/OpenGL.h>
 #elif defined(__unix__)
-#include <GL/glew.h>
+	#include <GL/glxew.h>
-#include "gl/api/glext.h"
 #else // !__APPLE__ && !__unix__
-#include <GL/gl.h>
+	#define DWORD WINDOWS_DWORD	// I don't want to depend on this throughout the GL code!
-#include <GL/glu.h>
+	#include <GL/wglew.h>
-#include "gl/api/glext.h"
+	#undef DWORD
 #endif
-#include "gl/api/gl_api.h"
 
 #ifdef _WIN32
 #define DWORD WINDOWS_DWORD	// I don't want to depend on this throughout the GL code!
-#include "gl/api/wglext.h"
+//#include "gl/api/wglext.h"
 #ifndef __WINE__
 #undef DWORD
 #endif

src/gl/textures/gl_hwtexture.cpp

@@ -72,11 +72,7 @@ unsigned int FHardwareTexture::lastbound[FHardwareTexture::MAX_TEXTURES];
 int FHardwareTexture::GetTexDimension(int value)
 {
 	if (value > gl.max_texturesize) return gl.max_texturesize;
-	if (gl.flags&RFL_NPOT_TEXTURE) return value;
+	return value;
-
-	int i=1;
-	while (i<value) i+=i;
-	return i;
 }
 
 //===========================================================================
@@ -122,12 +118,9 @@ void FHardwareTexture::LoadImage(unsigned char * buffer,int w, int h, unsigned i
 
 		glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, (mipmap && use_mipmapping && !forcenofiltering));
 
-		if (rw == w && rh == h)
+		if (rw < w || rh < h)
 		{
-		}
+			// The texture is larger than what the hardware can handle so scale it down.
-		else if (wrapparam==GL_REPEAT || rw < w || rh < h)
-		{
-			// The image must be scaled to fit the texture
 			unsigned char * scaledbuffer=(unsigned char *)calloc(4,rw * (rh+1));
 			if (scaledbuffer)
 			{
@@ -136,27 +129,6 @@ void FHardwareTexture::LoadImage(unsigned char * buffer,int w, int h, unsigned i
 				buffer=scaledbuffer;
 			}
 		}
-		else
-		{
-			// The image must be copied to a larger buffer
-			unsigned char * scaledbuffer=(unsigned char *)calloc(4,rw * (rh+1));
-			if (scaledbuffer)
-			{
-				for(int y=0;y<h;y++)
-				{
-					memcpy(scaledbuffer + rw * y * 4, buffer + w * y * 4, w * 4);
-					// duplicate the last row to eliminate texture filtering artifacts on borders!
-					if (rw>w) 
-						memcpy(	scaledbuffer + rw * y * 4 + w * 4,
-						scaledbuffer + rw * y * 4 + w * 4 -4, 4);
-				}
-				// also duplicate the last line for the same reason!
-				memcpy(	scaledbuffer + rw * h * 4, 	scaledbuffer + rw * (h-1) * 4, w*4 + 4);
-				
-				deletebuffer=true;
-				buffer=scaledbuffer;
-			}
-		}
 	}
 	glTexImage2D(GL_TEXTURE_2D, 0, texformat, rw, rh, 0, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
 

src/gl/textures/gl_material.cpp

@@ -705,8 +705,6 @@ FMaterial::FMaterial(FTexture * tx, bool forceexpand)
 
 		mBaseLayer = ValidateSysTexture(tx, true);
 
-		if (gl.flags & RFL_NPOT_TEXTURE)	// trimming only works if non-power-of-2 textures are supported
-		{
 		int trim[4];
 
 		if (TrimBorders(trim))
@@ -722,7 +720,6 @@ FMaterial::FMaterial(FTexture * tx, bool forceexpand)
 			SpriteV[1] *= (trim[1]+trim[3]+2) / (float)Height[GLUSE_PATCH]; 
 		}
 	}
-	}
 }
 
 //===========================================================================