]> de.git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - vid_shared.c
changed TEXF_CLAMP to use GL_CLAMP_TO_EDGE (GL_EXT_texture_edge_clamp or GL_SGIS_text...
[xonotic/darkplaces.git] / vid_shared.c
index 8cb5234dbca455069b3107de5255ce9353777279..2260f240e2db5ad224b0092b13bc3b5a77679d5f 100644 (file)
@@ -1,32 +1,70 @@
 
 #include "quakedef.h"
 
+// global video state
+viddef_t vid;
+
 // LordHavoc: these are only set in wgl
 qboolean isG200 = false; // LordHavoc: the Matrox G200 can't do per pixel alpha, and it uses a D3D driver for GL... ugh...
 qboolean isRagePro = false; // LordHavoc: the ATI Rage Pro has limitations with per pixel alpha (the color scaler does not apply to per pixel alpha images...), although not as bad as a G200.
 
-// LordHavoc: GL_ARB_multitexture support
-int gl_textureunits;
-// LordHavoc: GL_ARB_texture_env_combine or GL_EXT_texture_env_combine support
+// GL_ARB_multitexture
+int gl_textureunits = 0;
+// GL_ARB_texture_env_combine or GL_EXT_texture_env_combine
 int gl_combine_extension = false;
-// LordHavoc: GL_EXT_compiled_vertex_array support
+// GL_EXT_compiled_vertex_array
 int gl_supportslockarrays = false;
+// GLX_SGI_video_sync or WGL_EXT_swap_control
+int gl_videosyncavailable = false;
+// stencil available
+int gl_stencil = false;
+// 3D textures available
+int gl_texture3d = false;
+// GL_ARB_texture_cubemap
+int gl_texturecubemap = false;
+// GL_ARB_texture_env_dot3
+int gl_dot3arb = false;
+// GL_SGIS_texture_edge_clamp
+int gl_support_clamptoedge = false;
+
+// LordHavoc: if window is hidden, don't update screen
+int vid_hidden = true;
+// LordHavoc: if window is not the active window, don't hog as much CPU time,
+// let go of the mouse, turn off sound, and restore system gamma ramps...
+int vid_activewindow = true;
+
+cvar_t vid_fullscreen = {CVAR_SAVE, "vid_fullscreen", "1"};
+cvar_t vid_width = {CVAR_SAVE, "vid_width", "640"};
+cvar_t vid_height = {CVAR_SAVE, "vid_height", "480"};
+cvar_t vid_bitsperpixel = {CVAR_SAVE, "vid_bitsperpixel", "16"};
+cvar_t vid_stencil = {CVAR_SAVE, "vid_stencil", "0"};
 
-int gl_maxdrawrangeelementsvertices;
-int gl_maxdrawrangeelementsindices;
-
-cvar_t vid_mode = {0, "vid_mode", "0"};
 cvar_t vid_mouse = {CVAR_SAVE, "vid_mouse", "1"};
-cvar_t vid_fullscreen = {0, "vid_fullscreen", "1"};
 cvar_t gl_combine = {0, "gl_combine", "1"};
 
-cvar_t in_pitch_min = {0, "in_pitch_min", "-90"};
-cvar_t in_pitch_max = {0, "in_pitch_max", "90"};
+cvar_t in_pitch_min = {0, "in_pitch_min", "-70"};
+cvar_t in_pitch_max = {0, "in_pitch_max", "80"};
 
 cvar_t m_filter = {CVAR_SAVE, "m_filter","0"};
 
+// brand of graphics chip
+const char *gl_vendor;
+// graphics chip model and other information
+const char *gl_renderer;
+// begins with 1.0.0, 1.1.0, 1.2.0, 1.2.1, 1.3.0, 1.3.1, or 1.4.0
+const char *gl_version;
+// extensions list, space separated
+const char *gl_extensions;
+// WGL, GLX, or AGL
+const char *gl_platform;
+// another extensions list, containing platform-specific extensions that are
+// not in the main list
+const char *gl_platformextensions;
+// name of driver library (opengl32.dll, libGL.so.1, or whatever)
+char gl_driver[256];
+
 // GL_ARB_multitexture
-void (GLAPIENTRY *qglMultiTexCoord2f) (GLenum, GLfloat, GLfloat);
+//void (GLAPIENTRY *qglMultiTexCoord2f) (GLenum, GLfloat, GLfloat);
 void (GLAPIENTRY *qglActiveTexture) (GLenum);
 void (GLAPIENTRY *qglClientActiveTexture) (GLenum);
 
@@ -45,8 +83,8 @@ void (GLAPIENTRY *qglClear)(GLbitfield mask);
 void (GLAPIENTRY *qglBlendFunc)(GLenum sfactor, GLenum dfactor);
 void (GLAPIENTRY *qglCullFace)(GLenum mode);
 
-void (GLAPIENTRY *qglDrawBuffer)(GLenum mode);
-void (GLAPIENTRY *qglReadBuffer)(GLenum mode);
+//void (GLAPIENTRY *qglDrawBuffer)(GLenum mode);
+//void (GLAPIENTRY *qglReadBuffer)(GLenum mode);
 void (GLAPIENTRY *qglEnable)(GLenum cap);
 void (GLAPIENTRY *qglDisable)(GLenum cap);
 //GLboolean GLAPIENTRY *qglIsEnabled)(GLenum cap);
@@ -67,7 +105,8 @@ void (GLAPIENTRY *qglFlush)(void);
 void (GLAPIENTRY *qglClearDepth)(GLclampd depth);
 void (GLAPIENTRY *qglDepthFunc)(GLenum func);
 void (GLAPIENTRY *qglDepthMask)(GLboolean flag);
-void (GLAPIENTRY *qglDepthRange)(GLclampd near_val, GLclampd far_val);
+//void (GLAPIENTRY *qglDepthRange)(GLclampd near_val, GLclampd far_val);
+void (GLAPIENTRY *qglColorMask)(GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha);
 
 void (GLAPIENTRY *qglDrawRangeElements)(GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices);
 void (GLAPIENTRY *qglDrawElements)(GLenum mode, GLsizei count, GLenum type, const GLvoid *indices);
@@ -75,14 +114,14 @@ void (GLAPIENTRY *qglVertexPointer)(GLint size, GLenum type, GLsizei stride, con
 //void (GLAPIENTRY *qglNormalPointer)(GLenum type, GLsizei stride, const GLvoid *ptr);
 void (GLAPIENTRY *qglColorPointer)(GLint size, GLenum type, GLsizei stride, const GLvoid *ptr);
 void (GLAPIENTRY *qglTexCoordPointer)(GLint size, GLenum type, GLsizei stride, const GLvoid *ptr);
-void (GLAPIENTRY *qglArrayElement)(GLint i);
+//void (GLAPIENTRY *qglArrayElement)(GLint i);
 
-void (GLAPIENTRY *qglColor4ub)(GLubyte red, GLubyte green, GLubyte blue, GLubyte alpha);
-void (GLAPIENTRY *qglTexCoord2f)(GLfloat s, GLfloat t);
-void (GLAPIENTRY *qglVertex2f)(GLfloat x, GLfloat y);
-void (GLAPIENTRY *qglVertex3f)(GLfloat x, GLfloat y, GLfloat z);
-void (GLAPIENTRY *qglBegin)(GLenum mode);
-void (GLAPIENTRY *qglEnd)(void);
+void (GLAPIENTRY *qglColor4f)(GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha);
+//void (GLAPIENTRY *qglTexCoord2f)(GLfloat s, GLfloat t);
+//void (GLAPIENTRY *qglVertex2f)(GLfloat x, GLfloat y);
+//void (GLAPIENTRY *qglVertex3f)(GLfloat x, GLfloat y, GLfloat z);
+//void (GLAPIENTRY *qglBegin)(GLenum mode);
+//void (GLAPIENTRY *qglEnd)(void);
 
 void (GLAPIENTRY *qglMatrixMode)(GLenum mode);
 void (GLAPIENTRY *qglOrtho)(GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble near_val, GLdouble far_val);
@@ -92,101 +131,110 @@ void (GLAPIENTRY *qglViewport)(GLint x, GLint y, GLsizei width, GLsizei height);
 //void (GLAPIENTRY *qglPopMatrix)(void);
 void (GLAPIENTRY *qglLoadIdentity)(void);
 //void (GLAPIENTRY *qglLoadMatrixd)(const GLdouble *m);
-//void (GLAPIENTRY *qglLoadMatrixf)(const GLfloat *m);
+void (GLAPIENTRY *qglLoadMatrixf)(const GLfloat *m);
 //void (GLAPIENTRY *qglMultMatrixd)(const GLdouble *m);
 //void (GLAPIENTRY *qglMultMatrixf)(const GLfloat *m);
 //void (GLAPIENTRY *qglRotated)(GLdouble angle, GLdouble x, GLdouble y, GLdouble z);
-void (GLAPIENTRY *qglRotatef)(GLfloat angle, GLfloat x, GLfloat y, GLfloat z);
+//void (GLAPIENTRY *qglRotatef)(GLfloat angle, GLfloat x, GLfloat y, GLfloat z);
 //void (GLAPIENTRY *qglScaled)(GLdouble x, GLdouble y, GLdouble z);
 //void (GLAPIENTRY *qglScalef)(GLfloat x, GLfloat y, GLfloat z);
 //void (GLAPIENTRY *qglTranslated)(GLdouble x, GLdouble y, GLdouble z);
-void (GLAPIENTRY *qglTranslatef)(GLfloat x, GLfloat y, GLfloat z);
+//void (GLAPIENTRY *qglTranslatef)(GLfloat x, GLfloat y, GLfloat z);
 
 void (GLAPIENTRY *qglReadPixels)(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid *pixels);
 
-//void (GLAPIENTRY *qglStencilFunc)(GLenum func, GLint ref, GLuint mask);
-//void (GLAPIENTRY *qglStencilMask)(GLuint mask);
-//void (GLAPIENTRY *qglStencilOp)(GLenum fail, GLenum zfail, GLenum zpass);
-//void (GLAPIENTRY *qglClearStencil)(GLint s);
+void (GLAPIENTRY *qglStencilFunc)(GLenum func, GLint ref, GLuint mask);
+void (GLAPIENTRY *qglStencilMask)(GLuint mask);
+void (GLAPIENTRY *qglStencilOp)(GLenum fail, GLenum zfail, GLenum zpass);
+void (GLAPIENTRY *qglClearStencil)(GLint s);
 
 //void (GLAPIENTRY *qglTexEnvf)(GLenum target, GLenum pname, GLfloat param);
 void (GLAPIENTRY *qglTexEnvi)(GLenum target, GLenum pname, GLint param);
-
 //void (GLAPIENTRY *qglTexParameterf)(GLenum target, GLenum pname, GLfloat param);
+//void (GLAPIENTRY *qglTexParameterfv)(GLenum target, GLenum pname, GLfloat *params);
 void (GLAPIENTRY *qglTexParameteri)(GLenum target, GLenum pname, GLint param);
 
+void (GLAPIENTRY *qglGenTextures)(GLsizei n, GLuint *textures);
+void (GLAPIENTRY *qglDeleteTextures)(GLsizei n, const GLuint *textures);
 void (GLAPIENTRY *qglBindTexture)(GLenum target, GLuint texture);
+//void (GLAPIENTRY *qglPrioritizeTextures)(GLsizei n, const GLuint *textures, const GLclampf *priorities);
+//GLboolean (GLAPIENTRY *qglAreTexturesResident)(GLsizei n, const GLuint *textures, GLboolean *residences);
+GLboolean (GLAPIENTRY *qglIsTexture)(GLuint texture);
+//void (GLAPIENTRY *qglPixelStoref)(GLenum pname, GLfloat param);
+void (GLAPIENTRY *qglPixelStorei)(GLenum pname, GLint param);
+
+void (GLAPIENTRY *qglTexImage1D)(GLenum target, GLint level, GLint internalFormat, GLsizei width, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
 void (GLAPIENTRY *qglTexImage2D)(GLenum target, GLint level, GLint internalFormat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+void (GLAPIENTRY *qglTexSubImage1D)(GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLenum type, const GLvoid *pixels);
 void (GLAPIENTRY *qglTexSubImage2D)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels);
-void (GLAPIENTRY *qglDeleteTextures)(GLsizei n, const GLuint *textures);
+void (GLAPIENTRY *qglCopyTexImage1D)(GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLint border);
+void (GLAPIENTRY *qglCopyTexImage2D)(GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
+void (GLAPIENTRY *qglCopyTexSubImage1D)(GLenum target, GLint level, GLint xoffset, GLint x, GLint y, GLsizei width);
+void (GLAPIENTRY *qglCopyTexSubImage2D)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
+
 
 void (GLAPIENTRY *qglDrawRangeElementsEXT)(GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices);
 
 //void (GLAPIENTRY *qglColorTableEXT)(int, int, int, int, int, const void *);
 
-#if WIN32
-int (WINAPI *qwglChoosePixelFormat)(HDC, CONST PIXELFORMATDESCRIPTOR *);
-int (WINAPI *qwglDescribePixelFormat)(HDC, int, UINT, LPPIXELFORMATDESCRIPTOR);
-//int (WINAPI *qwglGetPixelFormat)(HDC);
-BOOL (WINAPI *qwglSetPixelFormat)(HDC, int, CONST PIXELFORMATDESCRIPTOR *);
-BOOL (WINAPI *qwglSwapBuffers)(HDC);
-HGLRC (WINAPI *qwglCreateContext)(HDC);
-BOOL (WINAPI *qwglDeleteContext)(HGLRC);
-PROC (WINAPI *qwglGetProcAddress)(LPCSTR);
-BOOL (WINAPI *qwglMakeCurrent)(HDC, HGLRC);
-//BOOL (WINAPI *qwglSwapIntervalEXT)(int interval);
-#endif
-
-
-typedef struct
-{
-       char *name;
-       void **funcvariable;
-}
-gl_extensionfunctionlist_t;
+void (GLAPIENTRY *qglTexImage3D)(GLenum target, GLint level, GLenum internalFormat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
+void (GLAPIENTRY *qglTexSubImage3D)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
+void (GLAPIENTRY *qglCopyTexSubImage3D)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
 
-typedef struct
-{
-       char *name;
-       gl_extensionfunctionlist_t *funcs;
-       int *enablevariable;
-       char *disableparm;
-}
-gl_extensioninfo_t;
+void (GLAPIENTRY *qglScissor)(GLint x, GLint y, GLsizei width, GLsizei height);
 
-#if WIN32
-static gl_extensionfunctionlist_t wglfuncs[] =
-{
-       {"wglChoosePixelFormat", (void **) &qwglChoosePixelFormat},
-       {"wglDescribePixelFormat", (void **) &qwglDescribePixelFormat},
-//     {"wglGetPixelFormat", (void **) &qwglGetPixelFormat},
-       {"wglSetPixelFormat", (void **) &qwglSetPixelFormat},
-       {"wglSwapBuffers", (void **) &qwglSwapBuffers},
-       {"wglCreateContext", (void **) &qwglCreateContext},
-       {"wglDeleteContext", (void **) &qwglDeleteContext},
-       {"wglGetProcAddress", (void **) &qwglGetProcAddress},
-       {"wglMakeCurrent", (void **) &qwglMakeCurrent},
-       {NULL, NULL}
-};
+void (GLAPIENTRY *qglPolygonOffset)(GLfloat factor, GLfloat units);
 
-/*
-static gl_extensionfunctionlist_t wglswapintervalfuncs[] =
+int GL_CheckExtension(const char *name, const dllfunction_t *funcs, const char *disableparm, int silent)
 {
-       {"wglSwapIntervalEXT", (void **) &qwglSwapIntervalEXT},
-       {NULL, NULL}
-};
-*/
-#endif
+       int failed = false;
+       const dllfunction_t *func;
 
-static gl_extensionfunctionlist_t opengl110funcs[] =
+       Con_Printf("checking for %s...  ", name);
+
+       for (func = funcs;func && func->name;func++)
+               *func->funcvariable = NULL;
+
+       if (disableparm && COM_CheckParm(disableparm))
+       {
+               Con_Printf("disabled by commandline\n");
+               return false;
+       }
+
+       if (strstr(gl_extensions, name) || strstr(gl_platformextensions, name) || (strncmp(name, "GL_", 3) && strncmp(name, "WGL_", 4) && strncmp(name, "GLX_", 4) && strncmp(name, "AGL_", 4)))
+       {
+               for (func = funcs;func && func->name != NULL;func++)
+               {
+                       // functions are cleared before all the extensions are evaluated
+                       if (!(*func->funcvariable = (void *) GL_GetProcAddress(func->name)))
+                       {
+                               if (!silent)
+                                       Con_Printf("missing function \"%s\" - broken driver!\n", func->name);
+                               failed = true;
+                       }
+               }
+               // delay the return so it prints all missing functions
+               if (failed)
+                       return false;
+               Con_Printf("enabled\n");
+               return true;
+       }
+       else
+       {
+               Con_Printf("not detected\n");
+               return false;
+       }
+}
+
+static dllfunction_t opengl110funcs[] =
 {
        {"glClearColor", (void **) &qglClearColor},
        {"glClear", (void **) &qglClear},
 //     {"glAlphaFunc", (void **) &qglAlphaFunc},
        {"glBlendFunc", (void **) &qglBlendFunc},
        {"glCullFace", (void **) &qglCullFace},
-       {"glDrawBuffer", (void **) &qglDrawBuffer},
-       {"glReadBuffer", (void **) &qglReadBuffer},
+//     {"glDrawBuffer", (void **) &qglDrawBuffer},
+//     {"glReadBuffer", (void **) &qglReadBuffer},
        {"glEnable", (void **) &qglEnable},
        {"glDisable", (void **) &qglDisable},
 //     {"glIsEnabled", (void **) &qglIsEnabled},
@@ -203,19 +251,20 @@ static gl_extensionfunctionlist_t opengl110funcs[] =
        {"glClearDepth", (void **) &qglClearDepth},
        {"glDepthFunc", (void **) &qglDepthFunc},
        {"glDepthMask", (void **) &qglDepthMask},
-       {"glDepthRange", (void **) &qglDepthRange},
+//     {"glDepthRange", (void **) &qglDepthRange},
        {"glDrawElements", (void **) &qglDrawElements},
+       {"glColorMask", (void **) &qglColorMask},
        {"glVertexPointer", (void **) &qglVertexPointer},
 //     {"glNormalPointer", (void **) &qglNormalPointer},
        {"glColorPointer", (void **) &qglColorPointer},
        {"glTexCoordPointer", (void **) &qglTexCoordPointer},
-       {"glArrayElement", (void **) &qglArrayElement},
-       {"glColor4ub", (void **) &qglColor4ub},
-       {"glTexCoord2f", (void **) &qglTexCoord2f},
-       {"glVertex2f", (void **) &qglVertex2f},
-       {"glVertex3f", (void **) &qglVertex3f},
-       {"glBegin", (void **) &qglBegin},
-       {"glEnd", (void **) &qglEnd},
+//     {"glArrayElement", (void **) &qglArrayElement},
+       {"glColor4f", (void **) &qglColor4f},
+//     {"glTexCoord2f", (void **) &qglTexCoord2f},
+//     {"glVertex2f", (void **) &qglVertex2f},
+//     {"glVertex3f", (void **) &qglVertex3f},
+//     {"glBegin", (void **) &qglBegin},
+//     {"glEnd", (void **) &qglEnd},
        {"glMatrixMode", (void **) &qglMatrixMode},
        {"glOrtho", (void **) &qglOrtho},
        {"glFrustum", (void **) &qglFrustum},
@@ -224,198 +273,116 @@ static gl_extensionfunctionlist_t opengl110funcs[] =
 //     {"glPopMatrix", (void **) &qglPopMatrix},
        {"glLoadIdentity", (void **) &qglLoadIdentity},
 //     {"glLoadMatrixd", (void **) &qglLoadMatrixd},
-//     {"glLoadMatrixf", (void **) &qglLoadMatrixf},
+       {"glLoadMatrixf", (void **) &qglLoadMatrixf},
 //     {"glMultMatrixd", (void **) &qglMultMatrixd},
 //     {"glMultMatrixf", (void **) &qglMultMatrixf},
 //     {"glRotated", (void **) &qglRotated},
-       {"glRotatef", (void **) &qglRotatef},
+//     {"glRotatef", (void **) &qglRotatef},
 //     {"glScaled", (void **) &qglScaled},
 //     {"glScalef", (void **) &qglScalef},
 //     {"glTranslated", (void **) &qglTranslated},
-       {"glTranslatef", (void **) &qglTranslatef},
+//     {"glTranslatef", (void **) &qglTranslatef},
        {"glReadPixels", (void **) &qglReadPixels},
-//     {"glStencilFunc", (void **) &qglStencilFunc},
-//     {"glStencilMask", (void **) &qglStencilMask},
-//     {"glStencilOp", (void **) &qglStencilOp},
-//     {"glClearStencil", (void **) &qglClearStencil},
+       {"glStencilFunc", (void **) &qglStencilFunc},
+       {"glStencilMask", (void **) &qglStencilMask},
+       {"glStencilOp", (void **) &qglStencilOp},
+       {"glClearStencil", (void **) &qglClearStencil},
 //     {"glTexEnvf", (void **) &qglTexEnvf},
        {"glTexEnvi", (void **) &qglTexEnvi},
 //     {"glTexParameterf", (void **) &qglTexParameterf},
+//     {"glTexParameterfv", (void **) &qglTexParameterfv},
        {"glTexParameteri", (void **) &qglTexParameteri},
+//     {"glPixelStoref", (void **) &qglPixelStoref},
+       {"glPixelStorei", (void **) &qglPixelStorei},
+       {"glGenTextures", (void **) &qglGenTextures},
+       {"glDeleteTextures", (void **) &qglDeleteTextures},
        {"glBindTexture", (void **) &qglBindTexture},
+//     {"glPrioritizeTextures", (void **) &qglPrioritizeTextures},
+//     {"glAreTexturesResident", (void **) &qglAreTexturesResident},
+       {"glIsTexture", (void **) &qglIsTexture},
+       {"glTexImage1D", (void **) &qglTexImage1D},
        {"glTexImage2D", (void **) &qglTexImage2D},
+       {"glTexSubImage1D", (void **) &qglTexSubImage1D},
        {"glTexSubImage2D", (void **) &qglTexSubImage2D},
-       {"glDeleteTextures", (void **) &qglDeleteTextures},
+       {"glCopyTexImage1D", (void **) &qglCopyTexImage1D},
+       {"glCopyTexImage2D", (void **) &qglCopyTexImage2D},
+       {"glCopyTexSubImage1D", (void **) &qglCopyTexSubImage1D},
+       {"glCopyTexSubImage2D", (void **) &qglCopyTexSubImage2D},
+       {"glScissor", (void **) &qglScissor},
+       {"glPolygonOffset", (void **) &qglPolygonOffset},
        {NULL, NULL}
 };
 
-static gl_extensionfunctionlist_t drawrangeelementsfuncs[] =
+static dllfunction_t drawrangeelementsfuncs[] =
 {
        {"glDrawRangeElements", (void **) &qglDrawRangeElements},
        {NULL, NULL}
 };
 
-static gl_extensionfunctionlist_t drawrangeelementsextfuncs[] =
+static dllfunction_t drawrangeelementsextfuncs[] =
 {
        {"glDrawRangeElementsEXT", (void **) &qglDrawRangeElementsEXT},
        {NULL, NULL}
 };
 
-static gl_extensionfunctionlist_t multitexturefuncs[] =
+static dllfunction_t multitexturefuncs[] =
 {
-       {"glMultiTexCoord2fARB", (void **) &qglMultiTexCoord2f},
+       //{"glMultiTexCoord2fARB", (void **) &qglMultiTexCoord2f},
        {"glActiveTextureARB", (void **) &qglActiveTexture},
        {"glClientActiveTextureARB", (void **) &qglClientActiveTexture},
        {NULL, NULL}
 };
 
-static gl_extensionfunctionlist_t compiledvertexarrayfuncs[] =
+static dllfunction_t compiledvertexarrayfuncs[] =
 {
        {"glLockArraysEXT", (void **) &qglLockArraysEXT},
        {"glUnlockArraysEXT", (void **) &qglUnlockArraysEXT},
        {NULL, NULL}
 };
 
-#ifndef WIN32
-#include <dlfcn.h>
-#endif
-
-#ifdef WIN32
-static HINSTANCE gldll;
-#else
-static void *prjobj = NULL;
-#endif
-
-static void gl_getfuncs_begin(void)
+static dllfunction_t texture3dextfuncs[] =
 {
-#ifdef WIN32
-       gldll = LoadLibrary("opengl32.dll");
-#else
-       if (prjobj)
-               dlclose(prjobj);
-
-       prjobj = dlopen(NULL, RTLD_LAZY);
-       if (prjobj == NULL)
-       {
-               Con_Printf("Unable to open symbol list for main program.\n");
-               return;
-       }
-#endif
-}
-
-static void gl_getfuncs_end(void)
-{
-#ifdef WIN32
-       FreeLibrary(gldll);
-#else
-       if (prjobj)
-               dlclose(prjobj);
-       prjobj = NULL;
-#endif
-}
-
-static void *gl_getfuncaddress(char *name)
-{
-       void *p = NULL;
-#ifdef WIN32
-       if (qwglGetProcAddress != NULL)
-               p = (void *) qwglGetProcAddress(name);
-       if (p == NULL)
-               p = (void *) GetProcAddress(gldll, name);
-#else
-       p = (void *) dlsym(prjobj, name);
-#endif
-       return p;
-}
-
-static int gl_checkextension(char *name, gl_extensionfunctionlist_t *funcs, char *disableparm, int silent)
-{
-       int failed = false;
-       gl_extensionfunctionlist_t *func;
-
-       Con_Printf("checking for %s...  ", name);
-
-       for (func = funcs;func && func->name;func++)
-               *func->funcvariable = NULL;
-
-       if (disableparm && COM_CheckParm(disableparm))
-       {
-               Con_Printf("disabled by commandline\n");
-               return false;
-       }
-
-       if (strncmp(name, "GL_", 3) || strstr(gl_extensions, name))
-       {
-               for (func = funcs;func && func->name != NULL;func++)
-               {
-                       // functions are cleared before all the extensions are evaluated
-                       if (!(*func->funcvariable = (void *) gl_getfuncaddress(func->name)))
-                       {
-                               if (!silent)
-                                       Con_Printf("missing function \"%s\" - broken driver!\n", func->name);
-                               failed = true;
-                       }
-               }
-               // delay the return so it prints all missing functions
-               if (failed)
-                       return false;
-               Con_Printf("enabled\n");
-               return true;
-       }
-       else
-       {
-               Con_Printf("not detected\n");
-               return false;
-       }
-}
+       {"glTexImage3DEXT", (void **) &qglTexImage3D},
+       {"glTexSubImage3DEXT", (void **) &qglTexSubImage3D},
+       {"glCopyTexSubImage3DEXT", (void **) &qglCopyTexSubImage3D},
+       {NULL, NULL}
+};
 
 void VID_CheckExtensions(void)
 {
-       Con_Printf("Checking OpenGL extensions...\n");
-
-       gl_getfuncs_begin();
-
+       gl_stencil = vid_stencil.integer;
        gl_combine_extension = false;
+       gl_dot3arb = false;
        gl_supportslockarrays = false;
        gl_textureunits = 1;
+       gl_support_clamptoedge = false;
 
-#if WIN32
-       if (!gl_checkextension("wgl", wglfuncs, NULL, false))
-               Sys_Error("wgl functions not found\n");
-       //gl_checkextension("wglSwapIntervalEXT", wglswapintervalfuncs, NULL, false);
-#endif
-
-       if (!gl_checkextension("OpenGL 1.1.0", opengl110funcs, NULL, false))
+       if (!GL_CheckExtension("OpenGL 1.1.0", opengl110funcs, NULL, false))
                Sys_Error("OpenGL 1.1.0 functions not found\n");
 
-       if (gl_checkextension("glDrawRangeElements", drawrangeelementsfuncs, "-nodrawrangeelements", true)
-        || gl_checkextension("GL_EXT_draw_range_elements", drawrangeelementsextfuncs, "-nodrawrangeelements", true))
-       {
-               qglGetIntegerv(GL_MAX_ELEMENTS_VERTICES, &gl_maxdrawrangeelementsvertices);
-               qglGetIntegerv(GL_MAX_ELEMENTS_INDICES, &gl_maxdrawrangeelementsindices);
+       Con_Printf ("GL_VENDOR: %s\n", gl_vendor);
+       Con_Printf ("GL_RENDERER: %s\n", gl_renderer);
+       Con_Printf ("GL_VERSION: %s\n", gl_version);
+       Con_Printf ("GL_EXTENSIONS: %s\n", gl_extensions);
+       Con_Printf ("%s_EXTENSIONS: %s\n", gl_platform, gl_platformextensions);
 
-               if (gl_maxdrawrangeelementsvertices < 1 || gl_maxdrawrangeelementsindices < 1)
-               {
-                       Con_Printf("invalid GL_MAX_ELEMENTS_VERTICES (%i) and/or GL_MAX_ELEMENTS_INDICES (%i)\n", gl_maxdrawrangeelementsvertices, gl_maxdrawrangeelementsindices);
-                       qglDrawRangeElements = qglDrawRangeElementsEXT = NULL;
-               }
-       }
+       Con_Printf("Checking OpenGL extensions...\n");
+
+       if (!GL_CheckExtension("glDrawRangeElements", drawrangeelementsfuncs, "-nodrawrangeelements", true))
+               GL_CheckExtension("GL_EXT_draw_range_elements", drawrangeelementsextfuncs, "-nodrawrangeelements", false);
 
-       if (gl_checkextension("GL_ARB_multitexture", multitexturefuncs, "-nomtex", false))
+       if (GL_CheckExtension("GL_ARB_multitexture", multitexturefuncs, "-nomtex", false))
        {
                qglGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &gl_textureunits);
-               if (gl_textureunits > 1)
-                       gl_combine_extension = gl_checkextension("GL_ARB_texture_env_combine", NULL, "-nocombine", false) || gl_checkextension("GL_EXT_texture_env_combine", NULL, "-nocombine", false);
-               else
-               {
-                       Con_Printf("GL_ARB_multitexture with less than 2 units? - BROKEN DRIVER!\n");
-                       gl_textureunits = 1; // for sanity sake, make sure it's not 0
-               }
+               gl_combine_extension = GL_CheckExtension("GL_ARB_texture_env_combine", NULL, "-nocombine", false) || GL_CheckExtension("GL_EXT_texture_env_combine", NULL, "-nocombine", false);
+               if (gl_combine_extension)
+                       gl_dot3arb = GL_CheckExtension("GL_ARB_texture_env_dot3", NULL, "-nodot3", false);
        }
 
-       gl_supportslockarrays = gl_checkextension("GL_EXT_compiled_vertex_array", compiledvertexarrayfuncs, "-nocva", false);
-
-       gl_getfuncs_end();
+       gl_texture3d = GL_CheckExtension("GL_EXT_texture3D", texture3dextfuncs, "-notexture3d", false);
+       gl_texturecubemap = GL_CheckExtension("GL_ARB_texture_cube_map", NULL, "-nocubemap", false);
+       gl_supportslockarrays = GL_CheckExtension("GL_EXT_compiled_vertex_array", compiledvertexarrayfuncs, "-nocva", false);
+       gl_support_clamptoedge = GL_CheckExtension("GL_EXT_texture_edge_clamp", NULL, "-noedgeclamp", false) || GL_CheckExtension("GL_SGIS_texture_edge_clamp", NULL, "-noedgeclamp", false);
 
        // we don't care if it's an extension or not, they are identical functions, so keep it simple in the rendering code
        if (qglDrawRangeElements == NULL)
@@ -482,15 +449,139 @@ void IN_Mouse(usercmd_t *cmd, float mx, float my)
        }
 }
 
-void VID_InitCvars(void)
+void VID_Shared_Init(void)
 {
-       Cvar_RegisterVariable(&vid_mode);
-       Cvar_RegisterVariable(&vid_mouse);
        Cvar_RegisterVariable(&vid_fullscreen);
+       Cvar_RegisterVariable(&vid_width);
+       Cvar_RegisterVariable(&vid_height);
+       Cvar_RegisterVariable(&vid_bitsperpixel);
+       Cvar_RegisterVariable(&vid_stencil);
+       Cvar_RegisterVariable(&vid_mouse);
        Cvar_RegisterVariable(&gl_combine);
        Cvar_RegisterVariable(&in_pitch_min);
        Cvar_RegisterVariable(&in_pitch_max);
        Cvar_RegisterVariable(&m_filter);
        Cmd_AddCommand("force_centerview", Force_CenterView_f);
+       Cmd_AddCommand("vid_restart", VID_Restart_f);
+}
+
+int current_vid_fullscreen;
+int current_vid_width;
+int current_vid_height;
+int current_vid_bitsperpixel;
+int current_vid_stencil;
+extern int VID_InitMode (int fullscreen, int width, int height, int bpp, int stencil);
+int VID_Mode(int fullscreen, int width, int height, int bpp, int stencil)
+{
+       Con_Printf("Video: %s %dx%dx%d %s\n", fullscreen ? "fullscreen" : "window", width, height, bpp, stencil ? "with stencil" : "without stencil");
+       if (VID_InitMode(fullscreen, width, height, bpp, stencil))
+       {
+               current_vid_fullscreen = fullscreen;
+               current_vid_width = width;
+               current_vid_height = height;
+               current_vid_bitsperpixel = bpp;
+               current_vid_stencil = stencil;
+               Cvar_SetValueQuick(&vid_fullscreen, fullscreen);
+               Cvar_SetValueQuick(&vid_width, width);
+               Cvar_SetValueQuick(&vid_height, height);
+               Cvar_SetValueQuick(&vid_bitsperpixel, bpp);
+               Cvar_SetValueQuick(&vid_stencil, stencil);
+               return true;
+       }
+       else
+               return false;
+}
+
+static void VID_OpenSystems(void)
+{
+       R_Modules_Start();
+       S_Open();
+       CDAudio_Open();
+}
+
+static void VID_CloseSystems(void)
+{
+       CDAudio_Close();
+       S_Close();
+       R_Modules_Shutdown();
 }
 
+void VID_Restart_f(void)
+{
+       Con_Printf("VID_Restart: changing from %s %dx%dx%dbpp %s, to %s %dx%dx%dbpp %s.\n",
+               current_vid_fullscreen ? "fullscreen" : "window", current_vid_width, current_vid_height, current_vid_bitsperpixel, current_vid_stencil ? "with stencil" : "without stencil",
+               vid_fullscreen.integer ? "fullscreen" : "window", vid_width.integer, vid_height.integer, vid_bitsperpixel.integer, vid_stencil.integer ? "with stencil" : "without stencil");
+       VID_Close();
+       if (!VID_Mode(vid_fullscreen.integer, vid_width.integer, vid_height.integer, vid_bitsperpixel.integer, vid_stencil.integer))
+       {
+               Con_Printf("Video mode change failed\n");
+               if (!VID_Mode(current_vid_fullscreen, current_vid_width, current_vid_height, current_vid_bitsperpixel, current_vid_stencil))
+                       Sys_Error("Unable to restore to last working video mode\n");
+       }
+       VID_OpenSystems();
+}
+
+int vid_commandlinecheck = true;
+void VID_Open(void)
+{
+       int i, width, height;
+       if (vid_commandlinecheck)
+       {
+               // interpret command-line parameters
+               vid_commandlinecheck = false;
+               if ((i = COM_CheckParm("-window")) != 0)
+                       Cvar_SetValueQuick(&vid_fullscreen, false);
+               if ((i = COM_CheckParm("-fullscreen")) != 0)
+                       Cvar_SetValueQuick(&vid_fullscreen, true);
+               width = 0;
+               height = 0;
+               if ((i = COM_CheckParm("-width")) != 0)
+                       width = atoi(com_argv[i+1]);
+               if ((i = COM_CheckParm("-height")) != 0)
+                       height = atoi(com_argv[i+1]);
+               if (width == 0)
+                       width = height * 4 / 3;
+               if (height == 0)
+                       height = width * 3 / 4;
+               if (width)
+                       Cvar_SetValueQuick(&vid_width, width);
+               if (height)
+                       Cvar_SetValueQuick(&vid_height, height);
+               if ((i = COM_CheckParm("-bpp")) != 0)
+                       Cvar_SetQuick(&vid_bitsperpixel, com_argv[i+1]);
+               if ((i = COM_CheckParm("-nostencil")) != 0)
+                       Cvar_SetValueQuick(&vid_stencil, 0);
+               if ((i = COM_CheckParm("-stencil")) != 0)
+                       Cvar_SetValueQuick(&vid_stencil, 1);
+       }
+
+       if (vid_stencil.integer && vid_bitsperpixel.integer != 32)
+       {
+               Con_Printf("vid_stencil not allowed without vid_bitsperpixel 32, turning off vid_stencil\n");
+               Cvar_SetValueQuick(&vid_stencil, 0);
+       }
+
+       Con_Printf("Starting video system\n");
+       if (!VID_Mode(vid_fullscreen.integer, vid_width.integer, vid_height.integer, vid_bitsperpixel.integer, vid_stencil.integer))
+       {
+               Con_Printf("Desired video mode fail, trying fallbacks...\n");
+               if (!vid_stencil.integer || !VID_Mode(vid_fullscreen.integer, vid_width.integer, vid_height.integer, vid_bitsperpixel.integer, false))
+               {
+                       if (vid_fullscreen.integer)
+                       {
+                               if (!VID_Mode(true, 640, 480, 16, false))
+                                       if (!VID_Mode(false, 640, 480, 16, false))
+                                               Sys_Error("Video modes failed\n");
+                       }
+                       else
+                               Sys_Error("Windowed video failed\n");
+               }
+       }
+       VID_OpenSystems();
+}
+
+void VID_Close(void)
+{
+       VID_CloseSystems();
+       VID_Shutdown();
+}