ref: 372afde46e7defc9dd2d719a1732b8ace1fa096e
dir: /ref_gl/gl_draw.c/
/*
Copyright (C) 1997-2001 Id Software, Inc.
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 the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// draw.c
#include "gl_local.h"
image_t *draw_chars;
extern qboolean scrap_dirty;
void Scrap_Upload (void);
/*
===============
Draw_InitLocal
===============
*/
void Draw_InitLocal (void)
{
// load console characters (don't bilerp characters)
draw_chars = GL_FindImage ("pics/conchars.pcx", it_pic);
GL_Bind( draw_chars->texnum );
qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
}
/*
================
Draw_Char
Draws one 8*8 graphics character with 0 being transparent.
It can be clipped to the top of the screen to allow the console to be
smoothly scrolled off.
================
*/
void Draw_Char (int x, int y, int num)
{
int row, col;
float frow, fcol, size;
num &= 255;
if ( (num&127) == 32 )
return; // space
if (y <= -8)
return; // totally off screen
row = num>>4;
col = num&15;
frow = row*0.0625;
fcol = col*0.0625;
size = 0.0625;
GL_Bind (draw_chars->texnum);
qglBegin (GL_QUADS);
qglTexCoord2f (fcol, frow);
qglVertex2f (x, y);
qglTexCoord2f (fcol + size, frow);
qglVertex2f (x+8, y);
qglTexCoord2f (fcol + size, frow + size);
qglVertex2f (x+8, y+8);
qglTexCoord2f (fcol, frow + size);
qglVertex2f (x, y+8);
qglEnd ();
}
/*
=============
Draw_FindPic
=============
*/
image_t *Draw_FindPic (char *name)
{
image_t *gl;
char fullname[MAX_QPATH];
if (name[0] != '/' && name[0] != '\\')
{
Com_sprintf (fullname, sizeof(fullname), "pics/%s.pcx", name);
gl = GL_FindImage (fullname, it_pic);
}
else
gl = GL_FindImage (name+1, it_pic);
return gl;
}
/*
=============
Draw_GetPicSize
=============
*/
void Draw_GetPicSize (int *w, int *h, char *pic)
{
image_t *gl;
gl = Draw_FindPic (pic);
if (!gl)
{
*w = *h = -1;
return;
}
*w = gl->width;
*h = gl->height;
}
/*
=============
Draw_StretchPic
=============
*/
void Draw_StretchPic (int x, int y, int w, int h, char *pic)
{
image_t *gl;
gl = Draw_FindPic (pic);
if (!gl)
{
ri.Con_Printf (PRINT_ALL, "Can't find pic: %s\n", pic);
return;
}
if (scrap_dirty)
Scrap_Upload ();
if ( ( ( gl_config.renderer == GL_RENDERER_MCD ) || ( gl_config.renderer & GL_RENDERER_RENDITION ) ) && !gl->has_alpha)
qglDisable (GL_ALPHA_TEST);
GL_Bind (gl->texnum);
qglBegin (GL_QUADS);
qglTexCoord2f (gl->sl, gl->tl);
qglVertex2f (x, y);
qglTexCoord2f (gl->sh, gl->tl);
qglVertex2f (x+w, y);
qglTexCoord2f (gl->sh, gl->th);
qglVertex2f (x+w, y+h);
qglTexCoord2f (gl->sl, gl->th);
qglVertex2f (x, y+h);
qglEnd ();
if ( ( ( gl_config.renderer == GL_RENDERER_MCD ) || ( gl_config.renderer & GL_RENDERER_RENDITION ) ) && !gl->has_alpha)
qglEnable (GL_ALPHA_TEST);
}
/*
=============
Draw_Pic
=============
*/
void Draw_Pic (int x, int y, char *pic)
{
image_t *gl;
gl = Draw_FindPic (pic);
if (!gl)
{
ri.Con_Printf (PRINT_ALL, "Can't find pic: %s\n", pic);
return;
}
if (scrap_dirty)
Scrap_Upload ();
if ( ( ( gl_config.renderer == GL_RENDERER_MCD ) || ( gl_config.renderer & GL_RENDERER_RENDITION ) ) && !gl->has_alpha)
qglDisable (GL_ALPHA_TEST);
GL_Bind (gl->texnum);
qglBegin (GL_QUADS);
qglTexCoord2f (gl->sl, gl->tl);
qglVertex2f (x, y);
qglTexCoord2f (gl->sh, gl->tl);
qglVertex2f (x+gl->width, y);
qglTexCoord2f (gl->sh, gl->th);
qglVertex2f (x+gl->width, y+gl->height);
qglTexCoord2f (gl->sl, gl->th);
qglVertex2f (x, y+gl->height);
qglEnd ();
if ( ( ( gl_config.renderer == GL_RENDERER_MCD ) || ( gl_config.renderer & GL_RENDERER_RENDITION ) ) && !gl->has_alpha)
qglEnable (GL_ALPHA_TEST);
}
/*
=============
Draw_TileClear
This repeats a 64*64 tile graphic to fill the screen around a sized down
refresh window.
=============
*/
void Draw_TileClear (int x, int y, int w, int h, char *pic)
{
image_t *image;
image = Draw_FindPic (pic);
if (!image)
{
ri.Con_Printf (PRINT_ALL, "Can't find pic: %s\n", pic);
return;
}
if ( ( ( gl_config.renderer == GL_RENDERER_MCD ) || ( gl_config.renderer & GL_RENDERER_RENDITION ) ) && !image->has_alpha)
qglDisable (GL_ALPHA_TEST);
GL_Bind (image->texnum);
qglBegin (GL_QUADS);
qglTexCoord2f (x/64.0, y/64.0);
qglVertex2f (x, y);
qglTexCoord2f ( (x+w)/64.0, y/64.0);
qglVertex2f (x+w, y);
qglTexCoord2f ( (x+w)/64.0, (y+h)/64.0);
qglVertex2f (x+w, y+h);
qglTexCoord2f ( x/64.0, (y+h)/64.0 );
qglVertex2f (x, y+h);
qglEnd ();
if ( ( ( gl_config.renderer == GL_RENDERER_MCD ) || ( gl_config.renderer & GL_RENDERER_RENDITION ) ) && !image->has_alpha)
qglEnable (GL_ALPHA_TEST);
}
/*
=============
Draw_Fill
Fills a box of pixels with a single color
=============
*/
void Draw_Fill (int x, int y, int w, int h, int c)
{
union
{
unsigned c;
byte v[4];
} color;
if ( (unsigned)c > 255)
ri.Sys_Error (ERR_FATAL, "Draw_Fill: bad color");
qglDisable (GL_TEXTURE_2D);
color.c = d_8to24table[c];
qglColor3f (color.v[0]/255.0,
color.v[1]/255.0,
color.v[2]/255.0);
qglBegin (GL_QUADS);
qglVertex2f (x,y);
qglVertex2f (x+w, y);
qglVertex2f (x+w, y+h);
qglVertex2f (x, y+h);
qglEnd ();
qglColor3f (1,1,1);
qglEnable (GL_TEXTURE_2D);
}
//=============================================================================
/*
================
Draw_FadeScreen
================
*/
void Draw_FadeScreen (void)
{
qglEnable (GL_BLEND);
qglDisable (GL_TEXTURE_2D);
qglColor4f (0, 0, 0, 0.8);
qglBegin (GL_QUADS);
qglVertex2f (0,0);
qglVertex2f (vid.width, 0);
qglVertex2f (vid.width, vid.height);
qglVertex2f (0, vid.height);
qglEnd ();
qglColor4f (1,1,1,1);
qglEnable (GL_TEXTURE_2D);
qglDisable (GL_BLEND);
}
//====================================================================
/*
=============
Draw_StretchRaw
=============
*/
extern unsigned r_rawpalette[256];
void Draw_StretchRaw (int x, int y, int w, int h, int cols, int rows, byte *data)
{
unsigned image32[256*256];
unsigned char image8[256*256];
int i, j, trows;
byte *source;
int frac, fracstep;
float hscale;
int row;
float t;
GL_Bind (0);
if (rows<=256)
{
hscale = 1;
trows = rows;
}
else
{
hscale = rows/256.0;
trows = 256;
}
t = rows*hscale / 256;
if ( !qglColorTableEXT )
{
unsigned *dest;
for (i=0 ; i<trows ; i++)
{
row = (int)(i*hscale);
if (row > rows)
break;
source = data + cols*row;
dest = &image32[i*256];
fracstep = cols*0x10000/256;
frac = fracstep >> 1;
for (j=0 ; j<256 ; j++)
{
dest[j] = r_rawpalette[source[frac>>16]];
frac += fracstep;
}
}
qglTexImage2D (GL_TEXTURE_2D, 0, gl_tex_solid_format, 256, 256, 0, GL_RGBA, GL_UNSIGNED_BYTE, image32);
}
else
{
unsigned char *dest;
for (i=0 ; i<trows ; i++)
{
row = (int)(i*hscale);
if (row > rows)
break;
source = data + cols*row;
dest = &image8[i*256];
fracstep = cols*0x10000/256;
frac = fracstep >> 1;
for (j=0 ; j<256 ; j++)
{
dest[j] = source[frac>>16];
frac += fracstep;
}
}
qglTexImage2D( GL_TEXTURE_2D,
0,
GL_COLOR_INDEX8_EXT,
256, 256,
0,
GL_COLOR_INDEX,
GL_UNSIGNED_BYTE,
image8 );
}
qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
if ( ( gl_config.renderer == GL_RENDERER_MCD ) || ( gl_config.renderer & GL_RENDERER_RENDITION ) )
qglDisable (GL_ALPHA_TEST);
qglBegin (GL_QUADS);
qglTexCoord2f (0, 0);
qglVertex2f (x, y);
qglTexCoord2f (1, 0);
qglVertex2f (x+w, y);
qglTexCoord2f (1, t);
qglVertex2f (x+w, y+h);
qglTexCoord2f (0, t);
qglVertex2f (x, y+h);
qglEnd ();
if ( ( gl_config.renderer == GL_RENDERER_MCD ) || ( gl_config.renderer & GL_RENDERER_RENDITION ) )
qglEnable (GL_ALPHA_TEST);
}