vid_shared.c

   1
   2 #include "quakedef.h"
   3
   4 // LordHavoc: these are only set in wgl
   5 qboolean isG200 = false; // LordHavoc: the Matrox G200 can't do per pixel alpha, and it uses a D3D driver for GL... ugh...
   6 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.
   7
   8 // LordHavoc: GL_ARB_multitexture support
   9 int gl_textureunits;
  10 // LordHavoc: GL_ARB_texture_env_combine or GL_EXT_texture_env_combine support
  11 int gl_combine_extension = false;
  12 // LordHavoc: GL_EXT_compiled_vertex_array support
  13 int gl_supportslockarrays = false;
  14
  15 cvar_t vid_mode = {0, "vid_mode", "0"};
  16 cvar_t vid_mouse = {CVAR_SAVE, "vid_mouse", "1"};
  17 cvar_t vid_fullscreen = {0, "vid_fullscreen", "1"};
  18 cvar_t gl_combine = {0, "gl_combine", "1"};
  19
  20 cvar_t in_pitch_min = {0, "in_pitch_min", "-90"};
  21 cvar_t in_pitch_max = {0, "in_pitch_max", "90"};
  22
  23 // GL_ARB_multitexture
  24 void (GLAPIENTRY *qglMultiTexCoord2f) (GLenum, GLfloat, GLfloat);
  25 void (GLAPIENTRY *qglActiveTexture) (GLenum);
  26 void (GLAPIENTRY *qglClientActiveTexture) (GLenum);
  27
  28 // GL_EXT_compiled_vertex_array
  29 void (GLAPIENTRY *qglLockArraysEXT) (GLint first, GLint count);
  30 void (GLAPIENTRY *qglUnlockArraysEXT) (void);
  31
  32 typedef struct
  33 {
  34         char *name;
  35         void **funcvariable;
  36 }
  37 gl_extensionfunctionlist_t;
  38
  39 typedef struct
  40 {
  41         char *name;
  42         gl_extensionfunctionlist_t *funcs;
  43         int *enablevariable;
  44         char *disableparm;
  45 }
  46 gl_extensioninfo_t;
  47
  48 static gl_extensionfunctionlist_t multitexturefuncs[] =
  49 {
  50         {"glMultiTexCoord2fARB", (void **) &qglMultiTexCoord2f},
  51         {"glActiveTextureARB", (void **) &qglActiveTexture},
  52         {"glClientActiveTextureARB", (void **) &qglClientActiveTexture},
  53         {NULL, NULL}
  54 };
  55
  56 static gl_extensionfunctionlist_t compiledvertexarrayfuncs[] =
  57 {
  58         {"glLockArraysEXT", (void **) &qglLockArraysEXT},
  59         {"glUnlockArraysEXT", (void **) &qglUnlockArraysEXT},
  60         {NULL, NULL}
  61 };
  62
  63 #ifndef WIN32
  64 #include <dlfcn.h>
  65 #endif
  66
  67 static void *prjobj = NULL;
  68
  69 static void gl_getfuncs_begin(void)
  70 {
  71 #ifndef WIN32
  72         if (prjobj)
  73                 dlclose(prjobj);
  74
  75         prjobj = dlopen(NULL, RTLD_LAZY);
  76         if (prjobj == NULL)
  77         {
  78                 Con_Printf("Unable to open symbol list for main program.\n");
  79                 return;
  80         }
  81 #endif
  82 }
  83
  84 static void gl_getfuncs_end(void)
  85 {
  86 #ifndef WIN32
  87         if (prjobj)
  88         {
  89                 dlclose(prjobj);
  90                 prjobj = NULL;
  91         }
  92 #endif
  93 }
  94
  95 static void *gl_getfuncaddress(char *name)
  96 {
  97 #ifdef WIN32
  98         return (void *) wglGetProcAddress(name);
  99 #else
 100         return (void *) dlsym(prjobj, name);
 101 #endif
 102 }
 103
 104 static int gl_checkextension(char *name, gl_extensionfunctionlist_t *funcs, char *disableparm)
 105 {
 106         gl_extensionfunctionlist_t *func;
 107
 108         Con_Printf("checking for %s...  ", name);
 109
 110         for (func = funcs;func && func->name;func++)
 111                 *func->funcvariable = NULL;
 112
 113         if (disableparm && COM_CheckParm(disableparm))
 114         {
 115                 Con_Printf("disabled by commandline\n");
 116                 return false;
 117         }
 118
 119         if (strstr(gl_extensions, name))
 120         {
 121                 for (func = funcs;func && func->name != NULL;func++)
 122                 {
 123                         if (!(*func->funcvariable = (void *) gl_getfuncaddress(func->name)))
 124                         {
 125                                 Con_Printf("missing function \"%s\"!\n", func->name);
 126                                 return false;
 127                         }
 128                 }
 129                 Con_Printf("enabled\n");
 130                 return true;
 131         }
 132         else
 133         {
 134                 Con_Printf("not detected\n");
 135                 return false;
 136         }
 137 }
 138
 139 void VID_CheckExtensions(void)
 140 {
 141         Con_Printf("Checking OpenGL extensions...\n");
 142
 143         gl_getfuncs_begin();
 144
 145         gl_combine_extension = false;
 146         gl_supportslockarrays = false;
 147         gl_textureunits = 1;
 148
 149         if (gl_checkextension("GL_ARB_multitexture", multitexturefuncs, "-nomtex"))
 150         {
 151                 glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &gl_textureunits);
 152                 if (gl_textureunits > 1)
 153                         gl_combine_extension = gl_checkextension("GL_ARB_texture_env_combine", NULL, "-nocombine") || gl_checkextension("GL_EXT_texture_env_combine", NULL, "-nocombine");
 154                 else
 155                         gl_textureunits = 1; // for sanity sake, make sure it's not 0
 156         }
 157
 158         gl_supportslockarrays = gl_checkextension("GL_EXT_compiled_vertex_array", compiledvertexarrayfuncs, "-nocva");
 159
 160         gl_getfuncs_end();
 161 }
 162
 163 void Force_CenterView_f (void)
 164 {
 165         cl.viewangles[PITCH] = 0;
 166 }
 167
 168 void VID_InitCvars(void)
 169 {
 170         Cvar_RegisterVariable(&vid_mode);
 171         Cvar_RegisterVariable(&vid_mouse);
 172         Cvar_RegisterVariable(&vid_fullscreen);
 173         Cvar_RegisterVariable(&gl_combine);
 174         Cvar_RegisterVariable(&in_pitch_min);
 175         Cvar_RegisterVariable(&in_pitch_max);
 176         Cmd_AddCommand("force_centerview", Force_CenterView_f);
 177 }