/* 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 $Id$ */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #ifdef HAVE_STRING_H # include #endif #ifdef HAVE_STRINGS_H # include #endif #ifdef _WIN32 // must be BEFORE include gl/gl.h # include "winquake.h" #endif #include #include "QF/compat.h" #include "QF/console.h" #include "QF/input.h" #include "QF/qargs.h" #include "QF/quakefs.h" #include "QF/qfgl_ext.h" #include "QF/vid.h" #include "glquake.h" #include "sbar.h" #define WARP_WIDTH 320 #define WARP_HEIGHT 200 unsigned int d_8to24table[256]; unsigned char d_15to8table[65536]; cvar_t *vid_mode; cvar_t *brighten; cvar_t *gl_multitexture; extern byte gammatable[256]; QF_glActiveTextureARB qglActiveTexture = NULL; QF_glMultiTexCoord2fARB qglMultiTexCoord2f = NULL; int gl_filter_min = GL_LINEAR_MIPMAP_NEAREST, gl_filter_max = GL_LINEAR; /*-----------------------------------------------------------------------*/ int texture_extension_number = 1; float gldepthmin, gldepthmax; const char *gl_vendor; const char *gl_renderer; const char *gl_version; const char *gl_extensions; // ARB Multitexture qboolean gl_mtex_capable = false; GLenum gl_mtex_enum = GL_TEXTURE0_ARB; QF_glColorTableEXT qglColorTableEXT = NULL; qboolean is8bit = false; cvar_t *vid_use8bit; cvar_t *brightness; cvar_t *contrast; /*-----------------------------------------------------------------------*/ void GL_Common_Init_Cvars (void) { vid_use8bit = Cvar_Get ("vid_use8bit", "0", CVAR_ROM, NULL, "Use 8-bit shared palettes."); brightness = Cvar_Get ("brightness", "1", CVAR_ARCHIVE, NULL, "Brightness level"); contrast = Cvar_Get ("contrast", "1", CVAR_ARCHIVE, NULL, "Contrast level"); gl_multitexture = Cvar_Get ("gl_multitexture", "0", CVAR_ARCHIVE, NULL, "Use multitexture when available"); } /* CheckMultiTextureExtensions Check for ARB multitexture support */ void CheckMultiTextureExtensions (void) { Con_Printf ("Checking for multitexture: "); if (COM_CheckParm ("-nomtex")) { Con_Printf ("disabled.\n"); return; } if (QFGL_ExtensionPresent ("GL_ARB_multitexture")) { int max_texture_units = 0; glGetIntegerv (GL_MAX_TEXTURE_UNITS_ARB, &max_texture_units); if (max_texture_units >= 2) { Con_Printf ("enabled, %d TMUs.\n", max_texture_units); qglMultiTexCoord2f = QFGL_ExtensionAddress ("glMultiTexCoord2fARB"); qglActiveTexture = QFGL_ExtensionAddress ("glActiveTextureARB"); gl_mtex_enum = GL_TEXTURE0_ARB; gl_mtex_capable = true; } else { Con_Printf ("disabled, not enough TMUs.\n"); } } else { Con_Printf ("not found.\n"); } } void VID_SetPalette (unsigned char *palette) { byte *pal; unsigned int r, g, b; unsigned int v; int r1, g1, b1; int k; unsigned short i; unsigned int *table; QFile *f; char s[255]; float dist, bestdist; static qboolean palflag = false; // // 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. // FIXME: Precalculate this and cache to disk. if (palflag) return; palflag = true; COM_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 = 0x1F 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", com_gamedir); COM_CreatePath (s); if ((f = Qopen (s, "wb")) != NULL) { Qwrite (f, d_15to8table, 1 << 15); Qclose (f); } } } /* GL_Init_Common */ void GL_Init_Common (void) { GL_Common_Init_Cvars (); gl_vendor = glGetString (GL_VENDOR); Con_Printf ("GL_VENDOR: %s\n", gl_vendor); gl_renderer = glGetString (GL_RENDERER); Con_Printf ("GL_RENDERER: %s\n", gl_renderer); gl_version = glGetString (GL_VERSION); Con_Printf ("GL_VERSION: %s\n", gl_version); gl_extensions = glGetString (GL_EXTENSIONS); Con_Printf ("GL_EXTENSIONS: %s\n", gl_extensions); glClearColor (0, 0, 0, 0); glCullFace (GL_FRONT); glEnable (GL_TEXTURE_2D); glEnable (GL_ALPHA_TEST); glAlphaFunc (GL_GREATER, 0.666); glPolygonMode (GL_FRONT_AND_BACK, GL_FILL); glShadeModel (GL_FLAT); glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min); glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max); glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); glEnable (GL_BLEND); glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); CheckMultiTextureExtensions (); } /* GL_BeginRendering */ 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; } #ifdef GL_SHARED_TEXTURE_PALETTE_EXT 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++; } glEnable (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. */ 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"); glEnable (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."); } } #endif void VID_Init8bitPalette (void) { Con_Printf ("Checking for 8-bit extension: "); if (vid_use8bit->int_val) { #ifdef GL_SHARED_TEXTURE_PALETTE_EXT Tdfx_Init8bitPalette (); Shared_Init8bitPalette (); #endif if (!is8bit) { Con_Printf ("\n 8-bit extension not found.\n"); } } else { Con_Printf ("disabled.\n"); } } /* GL_CheckBrightness This is something like the brightness cvar, except it hacks the palette directly instead of brightening the screen afterward. */ void GL_CheckBrightness (unsigned char *pal) { int i, inf; float brightness; brighten = Cvar_Get ("brighten", "1", CVAR_NONE, NULL, "Palette hack equivalent to brightness"); if ((i = COM_CheckParm ("-brighten"))) { brightness = atof (com_argv[i + 1]); } else { brightness = brighten->value; } brightness = bound (1, brightness, 5); Cvar_SetValue (brighten, brightness); Cvar_SetFlags (brighten, brighten->flags | CVAR_ROM); // Build gamma table if (brightness == 1.0) { // screw the math for (i = 0; i < 256; i++) { gammatable[i] = i; } } else { for (i = 0; i < 256; i++) { // brighten up the palette inf = (i * brightness); inf = bound (0, inf, 255); gammatable[i] = inf; } } // correct the palette for (i = 0; i < 768; i++) { pal[i] = gammatable[pal[i]]; } } 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) { }