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quakeforge/libs/video/targets/vid_common_gl.c
Bill Currie 785307fd9a Grievre's lighting tweeks
2004-04-27 22:18:23 +00:00

704 lines
17 KiB
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/*
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 <math.h>
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#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 int tess_max;
int tess;
// GL_LIGHT
int gl_max_lights;
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_viewmodel_hack;
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.");
gl_viewmodel_hack = Cvar_Get ("gl_viewmodel_hack", "1", CVAR_ARCHIVE, NULL,
"Depth buffer kludge to get weapon model to draw "
"on top. 0 - don't kludge, weapon pokes through "
"walls. 1 - fast method, some buggy drivers don't "
"like it. 2 - slow method, should work with all "
"drivers");
}
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);
}
static void
CheckLights (void)
{
int i;
float dark[4] = {0.0, 0.0, 0.0, 1.0},
ambient[4] = {0.2, 0.2, 0.2, 1.0},
diffuse[4] = {0.7, 0.7, 0.7, 1.0},
specular[4] = {0.1, 0.1, 0.1, 1.0};
qfglGetIntegerv (GL_MAX_LIGHTS, &gl_max_lights);
Con_Printf ("Max GL Lights %lu.\n", (long unsigned) gl_max_lights);
qfglEnable (GL_LIGHTING);
qfglLightModelfv (GL_LIGHT_MODEL_AMBIENT, dark);
qfglLightModelf (GL_LIGHT_MODEL_TWO_SIDE, 0.0);
for (i = 0; i < gl_max_lights; i++) {
qfglEnable (GL_LIGHT0 + i);
qfglLightf (GL_LIGHT0 + i, GL_CONSTANT_ATTENUATION, 0.5);
qfglDisable (GL_LIGHT0 + i);
}
// Set up material defaults
qfglMaterialfv (GL_FRONT, GL_AMBIENT, ambient);
qfglMaterialfv (GL_FRONT, GL_DIFFUSE, diffuse);
qfglMaterialfv (GL_FRONT, GL_SPECULAR, specular);
qfglMaterialf (GL_FRONT, GL_SHININESS, 1.0);
qfglDisable (GL_LIGHTING);
}
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 ();
CheckLights ();
}
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)
{
}
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