Add QFGL_WANT, and ability to handle non-required extensions.

include/QF/GL/funcs.h

@@ -37,9 +37,11 @@
 # include <windows.h>
 #endif
 
+#define QFGL_WANT(ret, name, args)	extern ret (GLAPIENTRY * qf##name) args;
 #define QFGL_NEED(ret, name, args)	extern ret (GLAPIENTRY * qf##name) args;
 #include "QF/GL/qf_funcs_list.h"
 #undef QFGL_NEED
+#undef QFGL_WANT
 
 extern void *libgl_handle;
 

include/QF/GL/qf_funcs_list.h

@@ -31,6 +31,11 @@
 #define UNDEF_QFGL_DONT_NEED
 #endif
 
+#ifndef QFGL_WANT
+#define QFGL_WANT(ret, func, params)
+#define UNDEF_QFGL_WANT
+#endif
+
 #ifndef QFGL_NEED
 #define QFGL_NEED(ret, func, params)
 #define UNDEF_QFGL_NEED
@@ -412,12 +417,16 @@ QFGL_NEED (void, glVertexPointer, (GLint size, GLenum type, GLsizei stride, cons
 QFGL_NEED (void, glViewport, (GLint x, GLint y, GLsizei width, GLsizei height))
 
 // ATI Extensions
-QFGL_NEED (void, glPNTrianglesiATI, (GLenum pname, GLint param))
+QFGL_WANT (void, glPNTrianglesiATI, (GLenum pname, GLint param))
 
 #ifdef UNDEF_QFGL_DONT_NEED
 #undef QFGL_DONT_NEED
 #endif
 
+#ifdef UNDEF_QFGL_WANT
+#undef QFGL_WANT
+#endif
+
 #ifdef UNDEF_QFGL_NEED
 #undef QFGL_DONT_NEED
 #endif

include/r_cvar.h

@@ -36,6 +36,7 @@ extern struct cvar_s     *gl_sky_clip;
 extern struct cvar_s     *gl_sky_debug;
 extern struct cvar_s     *gl_sky_divide;
 extern struct cvar_s     *gl_sky_multipass;
+extern struct cvar_s	 *gl_tessellate;
 extern struct cvar_s     *gl_texsort;
 extern struct cvar_s     *gl_triplebuffer;
 

libs/video/targets/qfgl_ext.c

@@ -94,10 +94,13 @@ QFGL_ProcAddress (void *handle, const char *name, qboolean crit)
 }
 
 // First we need to get all the function pointers declared.
-#define QFGL_NEED(ret, name, args)	\
+#define QFGL_WANT(ret, name, args) \
+	ret (GLAPIENTRY * qf##name) args;
+#define QFGL_NEED(ret, name, args) \
 	ret (GLAPIENTRY * qf##name) args;
 #include "QF/GL/qf_funcs_list.h"
 #undef QFGL_NEED
+#undef QFGL_WANT
 void		*libgl_handle;
 
 // Then we need to open the libGL and set all the symbols.
@@ -106,10 +109,13 @@ GLF_Init (void)
 {
 	libgl_handle = QFGL_LoadLibrary ();
 
-#define QFGL_NEED(ret, name, args)	\
+#define QFGL_WANT(ret, name, args) \
+	qf##name = QFGL_ProcAddress (libgl_handle, #name, false);
+#define QFGL_NEED(ret, name, args) \
 	qf##name = QFGL_ProcAddress (libgl_handle, #name, true);
 #include "QF/GL/qf_funcs_list.h"
 #undef QFGL_NEED
+#undef QFGL_WANT
 
 	return true;
 }

libs/video/targets/vid_common_gl.c

@@ -165,10 +165,10 @@ GL_Common_Init_Cvars (void)
 				  gl_screenshot_byte_swap_f, "Swap the bytes for gl "
 				  "screenshots. Needed if you get screenshots with red and "
 				  "blue swapped.");
-	gl_tessellate = Cvar_Get ("gl_tessellate", "0", CVAR_NONE, gl_tessellate_f,
-							  nva ("Specifies tessellation level from 0 to "
-								   "%i. Quadruples the triangle count at each "
-								   "tessellation level.", tess_max));
+	gl_tessellate =
+		Cvar_Get ("gl_tessellate", "0", CVAR_NONE, gl_tessellate_f,
+				  nva ("Specifies tessellation level from 0 to %i. Higher "
+					   "tessellation level means more triangles.", tess_max));
 	gl_vaelements_max = Cvar_Get ("gl_vaelements_max", "0", CVAR_ROM, NULL,
 								  "Limit the vertex array size for buggy "
 								  "drivers. 0 (default) uses driver provided "

tools/3dfx_stub/gl_stub.c

@@ -40,21 +40,27 @@
 
 #define QFGL_DONT_NEED(ret, func, params) QFGL_NEED(ret, func, params)
 
+#undef QFGL_WANT
 #undef QFGL_NEED
-
+#define QFGL_WANT(ret, name, args) \
+ret GLAPIENTRY norm_##name args;
 #define QFGL_NEED(ret, name, args) \
 ret GLAPIENTRY norm_##name args;
 #include "QF/GL/qf_funcs_list.h"
 #undef QFGL_NEED
+#undef QFGL_WANT
 fxMesaContext norm_fxMesaCreateContext (GLuint win, GrScreenResolution_t res, GrScreenRefresh_t ref, const GLint attribList[]);
 void norm_fxMesaMakeCurrent(fxMesaContext fxMesa);
 void norm_fxMesaDestroyContext(fxMesaContext fxMesa);
 void norm_fxMesaSwapBuffers(void);
 
+#define QFGL_WANT(ret, name, args) \
+ret GLAPIENTRY trace_##name args;
 #define QFGL_NEED(ret, name, args) \
 ret GLAPIENTRY trace_##name args;
 #include "QF/GL/qf_funcs_list.h"
 #undef QFGL_NEED
+#undef QFGL_WANT
 fxMesaContext trace_fxMesaCreateContext (GLuint win, GrScreenResolution_t res, GrScreenRefresh_t ref, const GLint attribList[]);
 void trace_fxMesaMakeCurrent(fxMesaContext fxMesa);
 void trace_fxMesaDestroyContext(fxMesaContext fxMesa);
@@ -67,10 +73,13 @@ typedef struct {
 } gl_stub_t;
 
 static gl_stub_t gl_stub_funcs[] = {
+#define QFGL_WANT(ret, name, args) \
+	{#name, norm_##name, trace_##name},
 #define QFGL_NEED(ret, name, args) \
 	{#name, norm_##name, trace_##name},
 #include "QF/GL/qf_funcs_list.h"
 #undef QFGL_NEED
+#undef QFGL_WANT
 	{"fxMesaCreateContext", norm_fxMesaCreateContext, trace_fxMesaCreateContext},
 	{"fxMesaMakeCurrent", norm_fxMesaMakeCurrent, trace_fxMesaMakeCurrent},
 	{"fxMesaDestroyContext", norm_fxMesaDestroyContext, trace_fxMesaDestroyContext},

tools/gl_stub/gl_stub.c

@@ -20,17 +20,24 @@ typedef struct __GLXcontextRec *GLXContext;
 
 #define QFGL_DONT_NEED(ret, func, params) QFGL_NEED(ret, func, params)
 
+#undef QFGL_WANT
 #undef QFGL_NEED
 
+#define QFGL_WANT(ret, name, args) \
+ret GLAPIENTRY norm_##name args;
 #define QFGL_NEED(ret, name, args) \
 ret GLAPIENTRY norm_##name args;
 #include "QF/GL/qf_funcs_list.h"
 #undef QFGL_NEED
+#undef QFGL_WANT
 
+#define QFGL_WANT(ret, name, args) \
+ret GLAPIENTRY trace_##name args;
 #define QFGL_NEED(ret, name, args) \
 ret GLAPIENTRY trace_##name args;
 #include "QF/GL/qf_funcs_list.h"
 #undef QFGL_NEED
+#undef QFGL_WANT
 
 typedef struct {
 	const char *name;
@@ -41,10 +48,13 @@ typedef struct {
 static int  trace;
 
 static gl_stub_t gl_stub_funcs[] = {
+#define QFGL_WANT(ret, name, args) \
+	{#name, norm_##name, trace_##name},
 #define QFGL_NEED(ret, name, args) \
 	{#name, norm_##name, trace_##name},
 #include "QF/GL/qf_funcs_list.h"
 #undef QFGL_NEED
+#undef QFGL_WANT
 };
 
 #define NUM_FUNCS (sizeof (gl_stub_funcs) / sizeof (gl_stub_funcs[0]))

tools/gl_stub/glx_funcs_list.h

@@ -31,6 +31,11 @@
 #define UNDEF_QFGL_DONT_NEED
 #endif
 
+#ifndef QFGL_WANT
+#define QFGL_WANT(ret, func, params)
+#define UNDEF_QFGL_WANT
+#endif
+
 #ifndef QFGL_NEED
 #define QFGL_NEED(ret, func, params)
 #define UNDEF_QFGL_NEED
@@ -45,6 +50,10 @@ QFGL_NEED (void, glXMakeCurrent, (Display *dpy, GLXDrawable drawable, GLXContext
 #undef QFGL_DONT_NEED
 #endif
 
+#ifdef UNDEF_QFGL_WANT
+#undef QFGL_WANT
+#endif
+
 #ifdef UNDEF_QFGL_NEED
 #undef QFGL_DONT_NEED
 #endif