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Xash3D FWGS engine.
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xash3d-fwgs/engine/client/gl_backend.c

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/*
gl_backend.c - rendering backend
Copyright (C) 2010 Uncle Mike
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 3 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.
*/
#include "common.h"
#include "client.h"
#include "gl_local.h"
#include "mathlib.h"
char r_speeds_msg[MAX_SYSPATH];
ref_speeds_t r_stats; // r_speeds counters
/*
===============
R_SpeedsMessage
===============
*/
qboolean R_SpeedsMessage( char *out, size_t size )
{
if( clgame.drawFuncs.R_SpeedsMessage != NULL )
{
if( clgame.drawFuncs.R_SpeedsMessage( out, size ))
return true;
// otherwise pass to default handler
}
if( r_speeds->value <= 0 ) return false;
if( !out || !size ) return false;
Q_strncpy( out, r_speeds_msg, size );
return true;
}
/*
==============
GL_BackendStartFrame
==============
*/
void GL_BackendStartFrame( void )
{
r_speeds_msg[0] = '\0';
}
/*
==============
GL_BackendEndFrame
==============
*/
void GL_BackendEndFrame( void )
{
if( r_speeds->value <= 0 || !RI.drawWorld )
return;
switch( (int)r_speeds->value )
{
case 1:
Q_snprintf( r_speeds_msg, sizeof( r_speeds_msg ), "%3i wpoly, %3i apoly\n%3i epoly, %3i spoly",
r_stats.c_world_polys, r_stats.c_alias_polys, r_stats.c_studio_polys, r_stats.c_sprite_polys );
break;
case 2:
Q_snprintf( r_speeds_msg, sizeof( r_speeds_msg ), "visible leafs:\n%3i leafs\ncurrent leaf %3i",
r_stats.c_world_leafs, Mod_PointInLeaf( RI.pvsorigin, cl.worldmodel->nodes ) - cl.worldmodel->leafs );
break;
case 3:
Q_snprintf( r_speeds_msg, sizeof( r_speeds_msg ), "%3i alias models drawn\n%3i studio models drawn\n%3i sprites drawn",
r_stats.c_alias_models_drawn, r_stats.c_studio_models_drawn, r_stats.c_sprite_models_drawn );
break;
case 4:
Q_snprintf( r_speeds_msg, sizeof( r_speeds_msg ), "%3i static entities\n%3i normal entities\n%3i server entities",
r_numStatics, r_numEntities - r_numStatics, pfnNumberOfEntities( ));
break;
case 5:
Q_snprintf( r_speeds_msg, sizeof( r_speeds_msg ), "%3i tempents\n%3i viewbeams\n%3i particles",
r_stats.c_active_tents_count, r_stats.c_view_beams_count, r_stats.c_particle_count );
break;
}
memset( &r_stats, 0, sizeof( r_stats ));
}
/*
=================
GL_LoadTexMatrix
=================
*/
void GL_LoadTexMatrix( const matrix4x4 m )
{
pglMatrixMode( GL_TEXTURE );
GL_LoadMatrix( m );
glState.texIdentityMatrix[glState.activeTMU] = false;
}
/*
=================
GL_LoadTexMatrixExt
=================
*/
void GL_LoadTexMatrixExt( const float *glmatrix )
{
Assert( glmatrix != NULL );
pglMatrixMode( GL_TEXTURE );
pglLoadMatrixf( glmatrix );
glState.texIdentityMatrix[glState.activeTMU] = false;
}
/*
=================
GL_LoadMatrix
=================
*/
void GL_LoadMatrix( const matrix4x4 source )
{
GLfloat dest[16];
Matrix4x4_ToArrayFloatGL( source, dest );
pglLoadMatrixf( dest );
}
/*
=================
GL_LoadIdentityTexMatrix
=================
*/
void GL_LoadIdentityTexMatrix( void )
{
if( glState.texIdentityMatrix[glState.activeTMU] )
return;
pglMatrixMode( GL_TEXTURE );
pglLoadIdentity();
glState.texIdentityMatrix[glState.activeTMU] = true;
}
/*
=================
GL_SelectTexture
=================
*/
void GL_SelectTexture( GLint tmu )
{
if( !GL_Support( GL_ARB_MULTITEXTURE ))
return;
// don't allow negative texture units
if( tmu < 0 ) return;
if( tmu >= GL_MaxTextureUnits( ))
{
MsgDev( D_ERROR, "GL_SelectTexture: bad tmu state %i\n", tmu );
return;
}
if( glState.activeTMU == tmu )
return;
glState.activeTMU = tmu;
if( pglActiveTextureARB )
{
pglActiveTextureARB( tmu + GL_TEXTURE0_ARB );
if( tmu < glConfig.max_texture_coords )
pglClientActiveTextureARB( tmu + GL_TEXTURE0_ARB );
}
}
/*
==============
GL_DisableAllTexGens
==============
*/
void GL_DisableAllTexGens( void )
{
GL_TexGen( GL_S, 0 );
GL_TexGen( GL_T, 0 );
GL_TexGen( GL_R, 0 );
GL_TexGen( GL_Q, 0 );
}
/*
==============
GL_CleanUpTextureUnits
==============
*/
void GL_CleanUpTextureUnits( int last )
{
int i;
for( i = glState.activeTMU; i > (last - 1); i-- )
{
// disable upper units
if( glState.currentTextureTargets[i] != GL_NONE )
{
pglDisable( glState.currentTextureTargets[i] );
glState.currentTextureTargets[i] = GL_NONE;
glState.currentTextures[i] = -1; // unbind texture
}
GL_SetTexCoordArrayMode( GL_NONE );
GL_LoadIdentityTexMatrix();
GL_DisableAllTexGens();
GL_SelectTexture( i - 1 );
}
}
/*
==============
GL_CleanupAllTextureUnits
==============
*/
void GL_CleanupAllTextureUnits( void )
{
// force to cleanup all the units
GL_SelectTexture( GL_MaxTextureUnits() - 1 );
GL_CleanUpTextureUnits( 0 );
}
/*
=================
GL_MultiTexCoord2f
=================
*/
void GL_MultiTexCoord2f( GLenum texture, GLfloat s, GLfloat t )
{
if( !GL_Support( GL_ARB_MULTITEXTURE ))
return;
if( pglMultiTexCoord2f != NULL )
pglMultiTexCoord2f( texture + GL_TEXTURE0_ARB, s, t );
}
/*
=================
GL_TextureTarget
=================
*/
void GL_TextureTarget( uint target )
{
if( glState.activeTMU < 0 || glState.activeTMU >= GL_MaxTextureUnits( ))
{
MsgDev( D_ERROR, "GL_TextureTarget: bad tmu state %i\n", glState.activeTMU );
return;
}
if( glState.currentTextureTargets[glState.activeTMU] != target )
{
if( glState.currentTextureTargets[glState.activeTMU] != GL_NONE )
pglDisable( glState.currentTextureTargets[glState.activeTMU] );
glState.currentTextureTargets[glState.activeTMU] = target;
if( target != GL_NONE )
pglEnable( glState.currentTextureTargets[glState.activeTMU] );
}
}
/*
=================
GL_TexGen
=================
*/
void GL_TexGen( GLenum coord, GLenum mode )
{
int tmu = min( glConfig.max_texture_coords, glState.activeTMU );
int bit, gen;
switch( coord )
{
case GL_S:
bit = 1;
gen = GL_TEXTURE_GEN_S;
break;
case GL_T:
bit = 2;
gen = GL_TEXTURE_GEN_T;
break;
case GL_R:
bit = 4;
gen = GL_TEXTURE_GEN_R;
break;
case GL_Q:
bit = 8;
gen = GL_TEXTURE_GEN_Q;
break;
default: return;
}
if( mode )
{
if( !( glState.genSTEnabled[tmu] & bit ))
{
pglEnable( gen );
glState.genSTEnabled[tmu] |= bit;
}
pglTexGeni( coord, GL_TEXTURE_GEN_MODE, mode );
}
else
{
if( glState.genSTEnabled[tmu] & bit )
{
pglDisable( gen );
glState.genSTEnabled[tmu] &= ~bit;
}
}
}
/*
=================
GL_SetTexCoordArrayMode
=================
*/
void GL_SetTexCoordArrayMode( GLenum mode )
{
int tmu = min( glConfig.max_texture_coords, glState.activeTMU );
int bit, cmode = glState.texCoordArrayMode[tmu];
if( mode == GL_TEXTURE_COORD_ARRAY )
bit = 1;
else if( mode == GL_TEXTURE_CUBE_MAP_ARB )
bit = 2;
else bit = 0;
if( cmode != bit )
{
if( cmode == 1 ) pglDisableClientState( GL_TEXTURE_COORD_ARRAY );
else if( cmode == 2 ) pglDisable( GL_TEXTURE_CUBE_MAP_ARB );
if( bit == 1 ) pglEnableClientState( GL_TEXTURE_COORD_ARRAY );
else if( bit == 2 ) pglEnable( GL_TEXTURE_CUBE_MAP_ARB );
glState.texCoordArrayMode[tmu] = bit;
}
}
/*
=================
GL_Cull
=================
*/
void GL_Cull( GLenum cull )
{
if( !cull )
{
pglDisable( GL_CULL_FACE );
glState.faceCull = 0;
return;
}
pglEnable( GL_CULL_FACE );
pglCullFace( cull );
glState.faceCull = cull;
}
void GL_SetRenderMode( int mode )
{
pglTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
switch( mode )
{
case kRenderNormal:
default:
pglDisable( GL_BLEND );
pglDisable( GL_ALPHA_TEST );
break;
case kRenderTransColor:
case kRenderTransTexture:
pglEnable( GL_BLEND );
pglDisable( GL_ALPHA_TEST );
pglBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
break;
case kRenderTransAlpha:
pglDisable( GL_BLEND );
pglEnable( GL_ALPHA_TEST );
break;
case kRenderGlow:
case kRenderTransAdd:
pglEnable( GL_BLEND );
pglDisable( GL_ALPHA_TEST );
pglBlendFunc( GL_SRC_ALPHA, GL_ONE );
break;
}
}
/*
==============================================================================
SCREEN SHOTS
==============================================================================
*/
// used for 'env' and 'sky' shots
typedef struct envmap_s
{
vec3_t angles;
int flags;
} envmap_t;
const envmap_t r_skyBoxInfo[6] =
{
{{ 0, 270, 180}, IMAGE_FLIP_X },
{{ 0, 90, 180}, IMAGE_FLIP_X },
{{ -90, 0, 180}, IMAGE_FLIP_X },
{{ 90, 0, 180}, IMAGE_FLIP_X },
{{ 0, 0, 180}, IMAGE_FLIP_X },
{{ 0, 180, 180}, IMAGE_FLIP_X },
};
const envmap_t r_envMapInfo[6] =
{
{{ 0, 0, 90}, 0 },
{{ 0, 180, -90}, 0 },
{{ 0, 90, 0}, 0 },
{{ 0, 270, 180}, 0 },
{{-90, 180, -90}, 0 },
{{ 90, 0, 90}, 0 }
};
/*
===============
VID_WriteOverviewScript
Create overview script file
===============
*/
void VID_WriteOverviewScript( void )
{
ref_overview_t *ov = &clgame.overView;
string filename;
file_t *f;
Q_snprintf( filename, sizeof( filename ), "overviews/%s.txt", clgame.mapname );
f = FS_Open( filename, "w", false );
if( !f ) return;
FS_Printf( f, "// overview description file for %s.bsp\n\n", clgame.mapname );
FS_Print( f, "global\n{\n" );
FS_Printf( f, "\tZOOM\t%.2f\n", ov->flZoom );
FS_Printf( f, "\tORIGIN\t%.2f\t%.2f\t%.2f\n", ov->origin[0], ov->origin[1], ov->origin[2] );
FS_Printf( f, "\tROTATED\t%i\n", ov->rotated ? 1 : 0 );
FS_Print( f, "}\n\nlayer\n{\n" );
FS_Printf( f, "\tIMAGE\t\"overviews/%s.bmp\"\n", clgame.mapname );
FS_Printf( f, "\tHEIGHT\t%.2f\n", ov->zFar ); // ???
FS_Print( f, "}\n" );
FS_Close( f );
}
qboolean VID_ScreenShot( const char *filename, int shot_type )
{
rgbdata_t *r_shot;
uint flags = IMAGE_FLIP_Y;
int width = 0, height = 0;
qboolean result;
r_shot = Mem_Alloc( r_temppool, sizeof( rgbdata_t ));
r_shot->width = (glState.width + 3) & ~3;
r_shot->height = (glState.height + 3) & ~3;
r_shot->flags = IMAGE_HAS_COLOR;
r_shot->type = PF_RGB_24;
r_shot->size = r_shot->width * r_shot->height * PFDesc[r_shot->type].bpp;
r_shot->palette = NULL;
r_shot->buffer = Mem_Alloc( r_temppool, r_shot->size );
// get screen frame
pglReadPixels( 0, 0, r_shot->width, r_shot->height, GL_RGB, GL_UNSIGNED_BYTE, r_shot->buffer );
switch( shot_type )
{
case VID_SCREENSHOT:
break;
case VID_SNAPSHOT:
FS_AllowDirectPaths( true );
break;
case VID_LEVELSHOT:
flags |= IMAGE_RESAMPLE;
if( glState.wideScreen )
{
height = 480;
width = 800;
}
else
{
height = 480;
width = 640;
}
break;
case VID_MINISHOT:
flags |= IMAGE_RESAMPLE;
height = 200;
width = 320;
break;
case VID_MAPSHOT:
VID_WriteOverviewScript(); // store overview script too
flags |= IMAGE_RESAMPLE|IMAGE_QUANTIZE; // GoldSrc request overviews in 8-bit format
height = 768;
width = 1024;
break;
}
Image_Process( &r_shot, width, height, flags, NULL );
// write image
result = FS_SaveImage( filename, r_shot );
host.write_to_clipboard = false; // disable write to clipboard
FS_AllowDirectPaths( false ); // always reset after store screenshot
FS_FreeImage( r_shot );
return result;
}
/*
=================
VID_CubemapShot
=================
*/
qboolean VID_CubemapShot( const char *base, uint size, const float *vieworg, qboolean skyshot )
{
rgbdata_t *r_shot, *r_side;
byte *temp = NULL;
byte *buffer = NULL;
string basename;
int i = 1, flags, result;
if( !RI.drawWorld || !cl.worldmodel )
return false;
// make sure the specified size is valid
while( i < size ) i<<=1;
if( i != size ) return false;
if( size > glState.width || size > glState.height )
return false;
// setup refdef
RI.params |= RP_ENVVIEW; // do not render non-bmodel entities
// alloc space
temp = Mem_Alloc( r_temppool, size * size * 3 );
buffer = Mem_Alloc( r_temppool, size * size * 3 * 6 );
r_shot = Mem_Alloc( r_temppool, sizeof( rgbdata_t ));
r_side = Mem_Alloc( r_temppool, sizeof( rgbdata_t ));
// use client vieworg
if( !vieworg ) vieworg = RI.vieworg;
for( i = 0; i < 6; i++ )
{
// go into 3d mode
R_Set2DMode( false );
if( skyshot )
{
R_DrawCubemapView( vieworg, r_skyBoxInfo[i].angles, size );
flags = r_skyBoxInfo[i].flags;
}
else
{
R_DrawCubemapView( vieworg, r_envMapInfo[i].angles, size );
flags = r_envMapInfo[i].flags;
}
pglReadPixels( 0, 0, size, size, GL_RGB, GL_UNSIGNED_BYTE, temp );
r_side->flags = IMAGE_HAS_COLOR;
r_side->width = r_side->height = size;
r_side->type = PF_RGB_24;
r_side->size = r_side->width * r_side->height * 3;
r_side->buffer = temp;
if( flags ) Image_Process( &r_side, 0, 0, flags, NULL );
memcpy( buffer + (size * size * 3 * i), r_side->buffer, size * size * 3 );
}
RI.params &= ~RP_ENVVIEW;
r_shot->flags = IMAGE_HAS_COLOR;
r_shot->flags |= (skyshot) ? IMAGE_SKYBOX : IMAGE_CUBEMAP;
r_shot->width = size;
r_shot->height = size;
r_shot->type = PF_RGB_24;
r_shot->size = r_shot->width * r_shot->height * 3 * 6;
r_shot->palette = NULL;
r_shot->buffer = buffer;
// make sure what we have right extension
Q_strncpy( basename, base, MAX_STRING );
COM_StripExtension( basename );
COM_DefaultExtension( basename, ".tga" );
// write image as 6 sides
result = FS_SaveImage( basename, r_shot );
FS_FreeImage( r_shot );
FS_FreeImage( r_side );
return result;
}
//=======================================================
/*
===============
R_ShowTextures
Draw all the images to the screen, on top of whatever
was there. This is used to test for texture thrashing.
===============
*/
void R_ShowTextures( void )
{
gltexture_t *image;
float x, y, w, h;
int total, start, end;
int i, j, k, base_w, base_h;
rgba_t color = { 192, 192, 192, 255 };
int charHeight, numTries = 0;
static qboolean showHelp = true;
string shortname;
if( !gl_showtextures->value )
return;
if( showHelp )
{
CL_CenterPrint( "use '<-' and '->' keys to change atlas page, ESC to quit", 0.25f );
showHelp = false;
}
GL_SetRenderMode( kRenderNormal );
pglClear( GL_COLOR_BUFFER_BIT );
pglFinish();
base_w = 8; // textures view by horizontal
base_h = 6; // textures view by vertical
rebuild_page:
total = base_w * base_h;
start = total * (gl_showtextures->value - 1);
end = total * gl_showtextures->value;
if( end > MAX_TEXTURES ) end = MAX_TEXTURES;
w = glState.width / base_w;
h = glState.height / base_h;
Con_DrawStringLen( NULL, NULL, &charHeight );
for( i = j = 0; i < MAX_TEXTURES; i++ )
{
image = R_GetTexture( i );
if( j == start ) break; // found start
if( pglIsTexture( image->texnum )) j++;
}
if( i == MAX_TEXTURES && gl_showtextures->value != 1 )
{
// bad case, rewind to one and try again
Cvar_SetValue( "r_showtextures", max( 1, gl_showtextures->value - 1 ));
if( ++numTries < 2 ) goto rebuild_page; // to prevent infinite loop
}
for( k = 0; i < MAX_TEXTURES; i++ )
{
if( j == end ) break; // page is full
image = R_GetTexture( i );
if( !pglIsTexture( image->texnum ))
continue;
x = k % base_w * w;
y = k / base_w * h;
pglColor4f( 1.0f, 1.0f, 1.0f, 1.0f );
GL_Bind( XASH_TEXTURE0, i ); // NOTE: don't use image->texnum here, because skybox has a 'wrong' indexes
if( FBitSet( image->flags, TF_DEPTHMAP ) && !FBitSet( image->flags, TF_NOCOMPARE ))
pglTexParameteri( image->target, GL_TEXTURE_COMPARE_MODE_ARB, GL_NONE );
pglBegin( GL_QUADS );
pglTexCoord2f( 0, 0 );
pglVertex2f( x, y );
if( image->target == GL_TEXTURE_RECTANGLE_EXT )
pglTexCoord2f( image->width, 0 );
else pglTexCoord2f( 1, 0 );
pglVertex2f( x + w, y );
if( image->target == GL_TEXTURE_RECTANGLE_EXT )
pglTexCoord2f( image->width, image->height );
else pglTexCoord2f( 1, 1 );
pglVertex2f( x + w, y + h );
if( image->target == GL_TEXTURE_RECTANGLE_EXT )
pglTexCoord2f( 0, image->height );
else pglTexCoord2f( 0, 1 );
pglVertex2f( x, y + h );
pglEnd();
if( FBitSet( image->flags, TF_DEPTHMAP ) && !FBitSet( image->flags, TF_NOCOMPARE ))
pglTexParameteri( image->target, GL_TEXTURE_COMPARE_MODE_ARB, GL_COMPARE_R_TO_TEXTURE_ARB );
COM_FileBase( image->name, shortname );
if( Q_strlen( shortname ) > 18 )
{
// cutoff too long names, it looks ugly
shortname[16] = '.';
shortname[17] = '.';
shortname[18] = '\0';
}
Con_DrawString( x + 1, y + h - charHeight, shortname, color );
j++, k++;
}
CL_DrawCenterPrint ();
pglFinish();
}