/* vid_common_gl.c Common OpenGL video driver functions Copyright (C) 1996-1997 Id Software, Inc. Copyright (C) 2000 Marcus Sundberg [mackan@stacken.kth.se] This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to: Free Software Foundation, Inc. 59 Temple Place - Suite 330 Boston, MA 02111-1307, USA */ #ifdef HAVE_CONFIG_H # include "config.h" #endif static __attribute__ ((unused)) const char rcsid[] = "$Id$"; #ifdef HAVE_MATH_H # include #endif #ifdef HAVE_STRING_H # include #endif #ifdef HAVE_STRINGS_H # include #endif #include "QF/console.h" #include "QF/cvar.h" #include "QF/input.h" #include "QF/qargs.h" #include "QF/quakefs.h" #include "QF/sys.h" #include "QF/va.h" #include "QF/vid.h" #include "QF/GL/defines.h" #include "QF/GL/extensions.h" #include "QF/GL/funcs.h" #include "QF/GL/qf_vid.h" #include "compat.h" #include "d_iface.h" #include "r_cvar.h" #include "sbar.h" #define WARP_WIDTH 320 #define WARP_HEIGHT 200 unsigned char d_15to8table[65536]; QF_glActiveTexture qglActiveTexture = NULL; QF_glMultiTexCoord2f qglMultiTexCoord2f = NULL; QF_glMultiTexCoord2fv qglMultiTexCoord2fv = NULL; const char *gl_extensions; const char *gl_renderer; const char *gl_vendor; const char *gl_version; int gl_major; int gl_minor; int gl_release_number; static int gl_bgra_capable; int use_bgra; int gl_va_capable; int vaelements; int texture_extension_number = 1; int gl_filter_min = GL_LINEAR_MIPMAP_NEAREST; int gl_filter_max = GL_LINEAR; float gldepthmin, gldepthmax; // Multitexture qboolean gl_mtex_capable = false; static int gl_mtex_tmus = 0; GLenum gl_mtex_enum; int gl_mtex_active_tmus = 0; qboolean gl_mtex_fullbright = false; // Combine qboolean gl_combine_capable = false; int lm_src_blend, lm_dest_blend; float rgb_scale = 1.0; QF_glColorTableEXT qglColorTableEXT = NULL; qboolean is8bit = false; qboolean gl_feature_mach64 = false; // ATI PN_triangles static qboolean TruForm; static GLint tess_max; GLint tess; cvar_t *gl_doublebright; cvar_t *gl_fb_bmodels; cvar_t *gl_max_size; cvar_t *gl_multitexture; cvar_t *gl_tessellate; cvar_t *gl_textures_bgra; cvar_t *gl_vaelements_max; cvar_t *gl_screenshot_byte_swap; cvar_t *vid_mode; cvar_t *vid_use8bit; void gl_multitexture_f (cvar_t *var); static void gl_max_size_f (cvar_t *var) { GLint texSize; if (!var) return; // Check driver's max texture size qfglGetIntegerv (GL_MAX_TEXTURE_SIZE, &texSize); if (var->int_val < 1) { Cvar_SetValue (var, texSize); } else { Cvar_SetValue (var, bound (1, var->int_val, texSize)); } } static void gl_textures_bgra_f (cvar_t *var) { if (!var) return; if (var->int_val && gl_bgra_capable) { use_bgra = 1; } else { use_bgra = 0; } } static void gl_fb_bmodels_f (cvar_t *var) { if (!var) return; if (var->int_val && gl_mtex_tmus >= 3) { gl_mtex_fullbright = true; } else { gl_mtex_fullbright = false; } } void gl_multitexture_f (cvar_t *var) { if (!var) return; if (var->int_val && gl_mtex_capable) { gl_mtex_active_tmus = gl_mtex_tmus; if (gl_fb_bmodels) { if (gl_fb_bmodels->int_val) { if (gl_mtex_tmus >= 3) { gl_mtex_fullbright = true; qglActiveTexture (gl_mtex_enum + 2); qfglEnable (GL_TEXTURE_2D); qfglTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL); qfglDisable (GL_TEXTURE_2D); } else { gl_mtex_fullbright = false; Con_Printf ("Not enough TMUs for BSP fullbrights.\n"); } } } else { gl_mtex_fullbright = false; } // Lightmaps qglActiveTexture (gl_mtex_enum + 1); qfglEnable (GL_TEXTURE_2D); if (gl_overbright) { if (gl_combine_capable && gl_overbright->int_val) { qfglTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE); qfglTexEnvf (GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_MODULATE); qfglTexEnvf (GL_TEXTURE_ENV, GL_RGB_SCALE, rgb_scale); } else { qfglTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); } } else { qfglTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); } qfglDisable (GL_TEXTURE_2D); // Base Texture qglActiveTexture (gl_mtex_enum + 0); } else { gl_mtex_active_tmus = 0; gl_mtex_fullbright = false; } } static void gl_screenshot_byte_swap_f (cvar_t *var) { if (var) qfglPixelStorei (GL_PACK_SWAP_BYTES, var->int_val ? GL_TRUE : GL_FALSE); } static void gl_tessellate_f (cvar_t * var) { if (TruForm) { if (var) tess = (bound (0, var->int_val, tess_max)); else tess = 0; qfglPNTrianglesiATI (GL_PN_TRIANGLES_TESSELATION_LEVEL_ATI, tess); } else { tess = 0; if (var) Con_Printf ("TruForm (GL_ATI_pn_triangles) is not supported by " "your hardware and/or drivers.\n"); } } static void GL_Common_Init_Cvars (void) { vid_use8bit = Cvar_Get ("vid_use8bit", "0", CVAR_ROM, NULL, "Use 8-bit " "shared palettes."); gl_textures_bgra = Cvar_Get ("gl_textures_bgra", "0", CVAR_ROM, gl_textures_bgra_f, "If set to 1, try to use " "BGR & BGRA textures instead of RGB & RGBA."); gl_fb_bmodels = Cvar_Get ("gl_fb_bmodels", "1", CVAR_ARCHIVE, gl_fb_bmodels_f, "Toggles fullbright color " "support for bmodels"); gl_max_size = Cvar_Get ("gl_max_size", "0", CVAR_NONE, gl_max_size_f, "Texture dimension"); gl_multitexture = Cvar_Get ("gl_multitexture", "0", CVAR_ARCHIVE, gl_multitexture_f, "Use multitexture when " "available."); gl_screenshot_byte_swap = Cvar_Get ("gl_screenshot_byte_swap", "0", CVAR_NONE, 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. 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 " "limit, -1 disables use of vertex arrays."); } static void CheckGLVersionString (void) { gl_version = qfglGetString (GL_VERSION); if (sscanf (gl_version, "%d.%d", &gl_major, &gl_minor) == 2) { gl_release_number = 0; if (gl_major >= 1) { if (gl_minor >= 1) { gl_va_capable = true; } else { gl_va_capable = false; } } } else if (sscanf (gl_version, "%d.%d.%d", &gl_major, &gl_minor, &gl_release_number) == 3) { if (gl_major >= 1) { if (gl_minor >= 1) { gl_va_capable = true; } else { gl_va_capable = false; } } } else { Sys_Error ("Malformed OpenGL version string!"); } Con_Printf ("GL_VERSION: %s\n", gl_version); gl_vendor = qfglGetString (GL_VENDOR); Con_Printf ("GL_VENDOR: %s\n", gl_vendor); gl_renderer = qfglGetString (GL_RENDERER); Con_Printf ("GL_RENDERER: %s\n", gl_renderer); gl_extensions = qfglGetString (GL_EXTENSIONS); Con_Printf ("GL_EXTENSIONS: %s\n", gl_extensions); if (strstr (gl_renderer, "Mesa DRI Mach64")) gl_feature_mach64 = true; } static void CheckBGRAExtensions (void) { if (gl_major >= 1 && gl_minor >= 3) { gl_bgra_capable = true; } else if (QFGL_ExtensionPresent ("GL_EXT_bgra")) { gl_bgra_capable = true; } else { gl_bgra_capable = false; } } static void CheckCombineExtensions (void) { if (gl_major >= 1 && gl_minor >= 3) { gl_combine_capable = true; Con_Printf ("COMBINE active, multitextured doublebright enabled.\n"); } else if (QFGL_ExtensionPresent ("GL_ARB_texture_env_combine")) { gl_combine_capable = true; Con_Printf ("COMBINE_ARB active, multitextured doublebright " "enabled.\n"); } else { gl_combine_capable = false; Con_Printf ("GL_ARB_texture_env_combine not found. gl_doublebright " "will have no effect with gl_multitexture on.\n"); } } /* CheckMultiTextureExtensions Check for ARB multitexture support */ static void CheckMultiTextureExtensions (void) { Con_Printf ("Checking for multitexture: "); if (COM_CheckParm ("-nomtex")) { Con_Printf ("disabled.\n"); return; } if (gl_major >= 1 && gl_minor >= 3) { qfglGetIntegerv (GL_MAX_TEXTURE_UNITS, &gl_mtex_tmus); if (gl_mtex_tmus >= 2) { Con_Printf ("enabled, %d TMUs.\n", gl_mtex_tmus); qglMultiTexCoord2f = QFGL_ExtensionAddress ("glMultiTexCoord2f"); qglMultiTexCoord2fv = QFGL_ExtensionAddress ("glMultiTexCoord2fv"); qglActiveTexture = QFGL_ExtensionAddress ("glActiveTexture"); gl_mtex_enum = GL_TEXTURE0; if (qglMultiTexCoord2f && gl_mtex_enum) gl_mtex_capable = true; else Con_Printf ("Multitexture disabled, could not find required " "functions\n"); } else { Con_Printf ("Multitexture disabled, not enough TMUs.\n"); } } else if (QFGL_ExtensionPresent ("GL_ARB_multitexture")) { qfglGetIntegerv (GL_MAX_TEXTURE_UNITS_ARB, &gl_mtex_tmus); if (gl_mtex_tmus >= 2) { Con_Printf ("enabled, %d TMUs.\n", gl_mtex_tmus); qglMultiTexCoord2f = QFGL_ExtensionAddress ("glMultiTexCoord2fARB"); qglMultiTexCoord2fv = QFGL_ExtensionAddress ("glMultiTexCoord2fvARB"); qglActiveTexture = QFGL_ExtensionAddress ("glActiveTextureARB"); gl_mtex_enum = GL_TEXTURE0_ARB; if (qglMultiTexCoord2f && gl_mtex_enum) gl_mtex_capable = true; else Con_Printf ("Multitexture disabled, could not find required " "functions\n"); } else { Con_Printf ("Multitexture disabled, not enough TMUs.\n"); } } else { Con_Printf ("not found.\n"); } } static void CheckTruFormExtensions (void) { if (QFGL_ExtensionPresent ("GL_ATI_pn_triangles")) { TruForm = true; qfglGetIntegerv (GL_MAX_PN_TRIANGLES_TESSELATION_LEVEL_ATI, &tess_max); qfglPNTrianglesiATI (GL_PN_TRIANGLES_NORMAL_MODE_ATI, GL_PN_TRIANGLES_NORMAL_MODE_QUADRATIC_ATI); qfglPNTrianglesiATI (GL_PN_TRIANGLES_POINT_MODE_ATI, GL_PN_TRIANGLES_POINT_MODE_CUBIC_ATI); } else { TruForm = false; tess = 0; tess_max = 0; } } static void CheckVertexArraySize (void) { qfglGetIntegerv (GL_MAX_ELEMENTS_VERTICES, &vaelements); if (vaelements > 65536) vaelements = 65536; if (gl_vaelements_max->int_val) vaelements = min (gl_vaelements_max->int_val, vaelements); // qfglGetIntegerv (MAX_ELEMENTS_INDICES, *vaindices); } void VID_SetPalette (unsigned char *palette) { byte *pal; char s[255]; float dist, bestdist; int r1, g1, b1, k; unsigned int r, g, b, v; unsigned short i; unsigned int *table; static qboolean palflag = false; QFile *f; // 8 8 8 encoding // Con_Printf ("Converting 8to24\n"); pal = palette; table = d_8to24table; for (i = 0; i < 255; i++) { // used to be i<256, see d_8to24table below r = pal[0]; g = pal[1]; b = pal[2]; pal += 3; #ifdef WORDS_BIGENDIAN v = (255 << 0) + (r << 24) + (g << 16) + (b << 8); #else v = (255 << 24) + (r << 0) + (g << 8) + (b << 16); #endif *table++ = v; } d_8to24table[255] = 0; // 255 is transparent // JACK: 3D distance calcs - k is last closest, l is the distance. if (palflag) return; palflag = true; QFS_FOpenFile ("glquake/15to8.pal", &f); if (f) { Qread (f, d_15to8table, 1 << 15); Qclose (f); } else { for (i = 0; i < (1 << 15); i++) { /* Maps 000000000000000 000000000011111 = Red = 0x001F 000001111100000 = Blue = 0x03E0 111110000000000 = Grn = 0x7C00 */ r = ((i & 0x1F) << 3) + 4; g = ((i & 0x03E0) >> 2) + 4; b = ((i & 0x7C00) >> 7) + 4; pal = (unsigned char *) d_8to24table; for (v = 0, k = 0, bestdist = 10000.0; v < 256; v++, pal += 4) { r1 = (int) r - (int) pal[0]; g1 = (int) g - (int) pal[1]; b1 = (int) b - (int) pal[2]; dist = sqrt (((r1 * r1) + (g1 * g1) + (b1 * b1))); if (dist < bestdist) { k = v; bestdist = dist; } } d_15to8table[i] = k; } snprintf (s, sizeof (s), "%s/glquake/15to8.pal", qfs_gamedir->dir.def); if ((f = QFS_WOpen (s, 0)) != NULL) { Qwrite (f, d_15to8table, 1 << 15); Qclose (f); } } } void GL_Init_Common (void) { GLF_FindFunctions (); CheckGLVersionString (); qfglClearColor (0, 0, 0, 0); qfglEnable (GL_TEXTURE_2D); qfglCullFace (GL_FRONT); qfglPolygonMode (GL_FRONT_AND_BACK, GL_FILL); qfglShadeModel (GL_FLAT); qfglEnable (GL_BLEND); qfglBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); qfglTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); qfglTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min); qfglTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max); qfglTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); qfglTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); CheckMultiTextureExtensions (); CheckCombineExtensions (); CheckBGRAExtensions (); CheckTruFormExtensions (); GL_Common_Init_Cvars (); CheckVertexArraySize (); } void GL_BeginRendering (int *x, int *y, int *width, int *height) { *x = *y = 0; *width = scr_width; *height = scr_height; } qboolean VID_Is8bit (void) { return is8bit; } static void Tdfx_Init8bitPalette (void) { // Check for 8bit Extensions and initialize them. int i; if (is8bit) return; if (QFGL_ExtensionPresent ("3DFX_set_global_palette")) { char *oldpal; GLubyte table[256][4]; QF_gl3DfxSetPaletteEXT qgl3DfxSetPaletteEXT = NULL; if (!(qgl3DfxSetPaletteEXT = QFGL_ExtensionAddress ("gl3DfxSetPaletteEXT"))) { Con_Printf ("3DFX_set_global_palette not found.\n"); return; } Con_Printf ("3DFX_set_global_palette.\n"); oldpal = (char *) d_8to24table; // d_8to24table3dfx; for (i = 0; i < 256; i++) { table[i][2] = *oldpal++; table[i][1] = *oldpal++; table[i][0] = *oldpal++; table[i][3] = 255; oldpal++; } qfglEnable (GL_SHARED_TEXTURE_PALETTE_EXT); qgl3DfxSetPaletteEXT ((GLuint *) table); is8bit = true; } else { Con_Printf ("\n 3DFX_set_global_palette not found."); } } /* The GL_EXT_shared_texture_palette seems like an idea which is /almost/ a good idea, but seems to be severely broken with many drivers, as such it is disabled. It should be noted, that a palette object extension as suggested by the GL_EXT_shared_texture_palette spec might be a very good idea in general. */ static void Shared_Init8bitPalette (void) { int i; GLubyte thePalette[256 * 3]; GLubyte *oldPalette, *newPalette; if (is8bit) return; if (QFGL_ExtensionPresent ("GL_EXT_shared_texture_palette")) { if (!(qglColorTableEXT = QFGL_ExtensionAddress ("glColorTableEXT"))) { Con_Printf ("glColorTableEXT not found.\n"); return; } Con_Printf ("GL_EXT_shared_texture_palette\n"); qfglEnable (GL_SHARED_TEXTURE_PALETTE_EXT); oldPalette = (GLubyte *) d_8to24table; // d_8to24table3dfx; newPalette = thePalette; for (i = 0; i < 256; i++) { *newPalette++ = *oldPalette++; *newPalette++ = *oldPalette++; *newPalette++ = *oldPalette++; oldPalette++; } qglColorTableEXT (GL_SHARED_TEXTURE_PALETTE_EXT, GL_RGB, 256, GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *) thePalette); is8bit = true; } else { Con_Printf ("\n GL_EXT_shared_texture_palette not found."); } } void VID_Init8bitPalette (void) { Con_Printf ("Checking for 8-bit extension: "); if (vid_use8bit->int_val) { Tdfx_Init8bitPalette (); Shared_Init8bitPalette (); if (!is8bit) Con_Printf ("\n 8-bit extension not found.\n"); } else { Con_Printf ("disabled.\n"); } } void VID_LockBuffer (void) { } void VID_UnlockBuffer (void) { } void D_BeginDirectRect (int x, int y, byte *pbitmap, int width, int height) { } void D_EndDirectRect (int x, int y, int width, int height) { }