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quakeforge/libs/video/renderer/sw/draw.c

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/*
draw.c
this is the only file outside the refresh that touches the vid buffer
Copyright (C) 1996-1997 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:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
static __attribute__ ((used)) const char rcsid[] =
"$Id$";
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include "QF/cvar.h"
#include "QF/draw.h"
#include "QF/quakefs.h"
#include "QF/sound.h"
#include "QF/sys.h"
#include "d_iface.h"
#include "r_cvar.h"
typedef struct {
vrect_t rect;
int width;
int height;
byte *ptexbytes;
int rowbytes;
} rectdesc_t;
static rectdesc_t r_rectdesc;
byte *draw_chars; // 8*8 graphic characters
qpic_t *draw_disc;
qpic_t *draw_backtile;
/* Support Routines */
typedef struct cachepic_s {
char name[MAX_QPATH];
cache_user_t cache;
} cachepic_t;
#define MAX_CACHED_PICS 128
cachepic_t cachepics[MAX_CACHED_PICS];
int numcachepics;
VISIBLE qpic_t *
Draw_PicFromWad (const char *name)
{
return W_GetLumpName (name);
}
VISIBLE qpic_t *
Draw_CachePic (const char *path, qboolean alpha)
{
cachepic_t *pic;
int i;
qpic_t *dat;
for (pic = cachepics, i = 0; i < numcachepics; pic++, i++)
if (!strcmp (path, pic->name))
break;
if (i == numcachepics) {
if (numcachepics == MAX_CACHED_PICS)
Sys_Error ("numcachepics == MAX_CACHED_PICS");
numcachepics++;
strcpy (pic->name, path);
}
dat = Cache_Check (&pic->cache);
if (dat)
return dat;
// load the pic from disk
QFS_LoadCacheFile (path, &pic->cache);
dat = (qpic_t *) pic->cache.data;
if (!dat) {
Sys_Error ("Draw_CachePic: failed to load %s", path);
}
SwapPic (dat);
return dat;
}
VISIBLE void
Draw_TextBox (int x, int y, int width, int lines, byte alpha)
{
qpic_t *p;
int cx, cy;
int n;
// draw left side
cx = x;
cy = y;
p = Draw_CachePic ("gfx/box_tl.lmp", true);
Draw_Pic (cx, cy, p);
p = Draw_CachePic ("gfx/box_ml.lmp", true);
for (n = 0; n < lines; n++) {
cy += 8;
Draw_Pic (cx, cy, p);
}
p = Draw_CachePic ("gfx/box_bl.lmp", true);
Draw_Pic (cx, cy + 8, p);
// draw middle
cx += 8;
while (width > 0) {
cy = y;
p = Draw_CachePic ("gfx/box_tm.lmp", true);
Draw_Pic (cx, cy, p);
p = Draw_CachePic ("gfx/box_mm.lmp", true);
for (n = 0; n < lines; n++) {
cy += 8;
if (n == 1)
p = Draw_CachePic ("gfx/box_mm2.lmp", true);
Draw_Pic (cx, cy, p);
}
p = Draw_CachePic ("gfx/box_bm.lmp", true);
Draw_Pic (cx, cy + 8, p);
width -= 2;
cx += 16;
}
// draw right side
cy = y;
p = Draw_CachePic ("gfx/box_tr.lmp", true);
Draw_Pic (cx, cy, p);
p = Draw_CachePic ("gfx/box_mr.lmp", true);
for (n = 0; n < lines; n++) {
cy += 8;
Draw_Pic (cx, cy, p);
}
p = Draw_CachePic ("gfx/box_br.lmp", true);
Draw_Pic (cx, cy + 8, p);
}
void
Draw_Init (void)
{
draw_chars = W_GetLumpName ("conchars");
draw_disc = W_GetLumpName ("disc");
draw_backtile = W_GetLumpName ("backtile");
r_rectdesc.width = draw_backtile->width;
r_rectdesc.height = draw_backtile->height;
r_rectdesc.ptexbytes = draw_backtile->data;
r_rectdesc.rowbytes = draw_backtile->width;
}
/*
Draw_Character
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.
*/
VISIBLE inline void
Draw_Character (int x, int y, unsigned int chr)
{
byte *dest;
byte *source;
int drawline;
int row, col;
chr &= 255;
if (y <= -8)
return; // totally off screen
if (y > (int) vid.conheight - 8 || x < 0 || x > (int) vid.conwidth - 8)
return;
if (chr < 0 || chr > 255)
return;
row = chr >> 4;
col = chr & 15;
source = draw_chars + (row << 10) + (col << 3);
if (y < 0) { // clipped
drawline = 8 + y;
source -= 128 * y;
y = 0;
} else
drawline = 8;
dest = ((byte*)vid.conbuffer) + y * vid.conrowbytes + x;
while (drawline--) {
if (source[0])
dest[0] = source[0];
if (source[1])
dest[1] = source[1];
if (source[2])
dest[2] = source[2];
if (source[3])
dest[3] = source[3];
if (source[4])
dest[4] = source[4];
if (source[5])
dest[5] = source[5];
if (source[6])
dest[6] = source[6];
if (source[7])
dest[7] = source[7];
source += 128;
dest += vid.conrowbytes;
}
}
VISIBLE void
Draw_String (int x, int y, const char *str)
{
while (*str) {
Draw_Character (x, y, *str++);
x += 8;
}
}
VISIBLE void
Draw_nString (int x, int y, const char *str, int count)
{
while (count-- && *str) {
Draw_Character (x, y, *str++);
x += 8;
}
}
VISIBLE void
Draw_AltString (int x, int y, const char *str)
{
while (*str) {
Draw_Character (x, y, (*str++) | 0x80);
x += 8;
}
}
static void
Draw_Pixel (int x, int y, byte color)
{
byte *dest;
dest = ((byte*)vid.conbuffer) + y * vid.conrowbytes + x;
*dest = color;
}
static void
crosshair_1 (int x, int y)
{
Draw_Character (x - 4, y - 4, '+');
}
static void
crosshair_2 (int x, int y)
{
byte c = crosshaircolor->int_val;
Draw_Pixel (x - 1, y, c);
Draw_Pixel (x - 3, y, c);
Draw_Pixel (x + 1, y, c);
Draw_Pixel (x + 3, y, c);
Draw_Pixel (x, y - 1, c);
Draw_Pixel (x, y - 3, c);
Draw_Pixel (x, y + 1, c);
Draw_Pixel (x, y + 3, c);
}
static void
crosshair_3 (int x, int y)
{
byte c = crosshaircolor->int_val;
Draw_Pixel (x - 3, y - 3, c);
Draw_Pixel (x + 3, y - 3, c);
Draw_Pixel (x - 2, y - 2, c);
Draw_Pixel (x + 2, y - 2, c);
Draw_Pixel (x - 3, y + 3, c);
Draw_Pixel (x + 2, y + 2, c);
Draw_Pixel (x - 2, y + 2, c);
Draw_Pixel (x + 3, y + 3, c);
}
static void (*crosshair_func[]) (int x, int y) = {
crosshair_1,
crosshair_2,
crosshair_3,
};
VISIBLE void
Draw_Crosshair (void)
{
int x, y;
int ch;
ch = crosshair->int_val - 1;
if ((unsigned) ch >= sizeof (crosshair_func) / sizeof (crosshair_func[0]))
return;
x = vid.conwidth / 2 + cl_crossx->int_val;
y = vid.conheight / 2 + cl_crossy->int_val;
crosshair_func[ch] (x, y);
}
VISIBLE void
Draw_CrosshairAt (int ch, int x, int y)
{
ch -= 1;
if ((unsigned) ch >= sizeof (crosshair_func) / sizeof (crosshair_func[0]))
return;
crosshair_func[ch] (x, y);
}
VISIBLE void
Draw_Pic (int x, int y, qpic_t *pic)
{
byte *dest, *source, tbyte;
int v, u;
if (x < 0 || (unsigned int) (x + pic->width) > vid.conwidth || y < 0 ||
(unsigned int) (y + pic->height) > vid.conheight) {
Sys_Error ("Draw_Pic: bad coordinates");
}
source = pic->data;
dest = ((byte*)vid.buffer) + y * vid.rowbytes + x;
if (pic->width & 7) { // general
for (v = 0; v < pic->height; v++) {
for (u = 0; u < pic->width; u++)
if ((tbyte = source[u]) != TRANSPARENT_COLOR)
dest[u] = tbyte;
dest += vid.rowbytes;
source += pic->width;
}
} else { // unwound
for (v = 0; v < pic->height; v++) {
for (u = 0; u < pic->width; u += 8) {
if ((tbyte = source[u]) != TRANSPARENT_COLOR)
dest[u] = tbyte;
if ((tbyte = source[u + 1]) != TRANSPARENT_COLOR)
dest[u + 1] = tbyte;
if ((tbyte = source[u + 2]) != TRANSPARENT_COLOR)
dest[u + 2] = tbyte;
if ((tbyte = source[u + 3]) != TRANSPARENT_COLOR)
dest[u + 3] = tbyte;
if ((tbyte = source[u + 4]) != TRANSPARENT_COLOR)
dest[u + 4] = tbyte;
if ((tbyte = source[u + 5]) != TRANSPARENT_COLOR)
dest[u + 5] = tbyte;
if ((tbyte = source[u + 6]) != TRANSPARENT_COLOR)
dest[u + 6] = tbyte;
if ((tbyte = source[u + 7]) != TRANSPARENT_COLOR)
dest[u + 7] = tbyte;
}
dest += vid.rowbytes;
source += pic->width;
}
}
}
VISIBLE void
Draw_SubPic (int x, int y, qpic_t *pic, int srcx, int srcy, int width,
int height)
{
byte *dest, *source, tbyte;
int u, v;
if ((x < 0) || (x + width > (int) vid.conwidth)
|| (y < 0) || (y + height > (int) vid.conheight)) {
Sys_Error ("Draw_SubPic: bad coordinates");
}
source = pic->data + srcy * pic->width + srcx;
dest = ((byte*)vid.buffer) + y * vid.rowbytes + x;
if (width & 7) { // general
for (v = 0; v < height; v++) {
for (u = 0; u < width; u++)
if ((tbyte = source[u]) != TRANSPARENT_COLOR)
dest[u] = tbyte;
dest += vid.rowbytes;
source += pic->width;
}
} else { // unwound
for (v = 0; v < height; v++) {
for (u = 0; u < width; u += 8) {
if ((tbyte = source[u]) != TRANSPARENT_COLOR)
dest[u] = tbyte;
if ((tbyte = source[u + 1]) != TRANSPARENT_COLOR)
dest[u + 1] = tbyte;
if ((tbyte = source[u + 2]) != TRANSPARENT_COLOR)
dest[u + 2] = tbyte;
if ((tbyte = source[u + 3]) != TRANSPARENT_COLOR)
dest[u + 3] = tbyte;
if ((tbyte = source[u + 4]) != TRANSPARENT_COLOR)
dest[u + 4] = tbyte;
if ((tbyte = source[u + 5]) != TRANSPARENT_COLOR)
dest[u + 5] = tbyte;
if ((tbyte = source[u + 6]) != TRANSPARENT_COLOR)
dest[u + 6] = tbyte;
if ((tbyte = source[u + 7]) != TRANSPARENT_COLOR)
dest[u + 7] = tbyte;
}
dest += vid.rowbytes;
source += pic->width;
}
}
}
VISIBLE void
Draw_ConsoleBackground (int lines, byte alpha)
{
int x, y, v;
byte *src, *dest;
int f, fstep;
qpic_t *conback;
conback = Draw_CachePic ("gfx/conback.lmp", false);
// draw the pic
dest = vid.conbuffer;
for (y = 0; y < lines; y++, dest += vid.conrowbytes) {
v = (vid.conheight - lines + y) * 200 / vid.conheight;
src = conback->data + v * 320;
if (vid.conwidth == 320)
memcpy (dest, src, vid.conwidth);
else {
f = 0;
fstep = 320 * 0x10000 / vid.conwidth;
for (x = 0; x < (int) vid.conwidth; x += 4) {
dest[x] = src[f >> 16];
f += fstep;
dest[x + 1] = src[f >> 16];
f += fstep;
dest[x + 2] = src[f >> 16];
f += fstep;
dest[x + 3] = src[f >> 16];
f += fstep;
}
}
}
Draw_AltString (vid.conwidth - strlen (cl_verstring->string) * 8 - 11,
lines - 14, cl_verstring->string);
}
static void
R_DrawRect (vrect_t *prect, int rowbytes, byte * psrc, int transparent)
{
byte t;
int i, j, srcdelta, destdelta;
byte *pdest;
pdest = ((byte*)vid.buffer) + (prect->y * vid.rowbytes) + prect->x;
srcdelta = rowbytes - prect->width;
destdelta = vid.rowbytes - prect->width;
if (transparent) {
for (i = 0; i < prect->height; i++) {
for (j = 0; j < prect->width; j++) {
t = *psrc;
if (t != TRANSPARENT_COLOR) {
*pdest = t;
}
psrc++;
pdest++;
}
psrc += srcdelta;
pdest += destdelta;
}
} else {
for (i = 0; i < prect->height; i++) {
memcpy (pdest, psrc, prect->width);
psrc += rowbytes;
pdest += vid.rowbytes;
}
}
}
/*
Draw_TileClear
This repeats a 64*64 tile graphic to fill the screen around a sized down
refresh window.
*/
VISIBLE void
Draw_TileClear (int x, int y, int w, int h)
{
int width, height, tileoffsetx, tileoffsety;
byte *psrc;
vrect_t vr;
r_rectdesc.rect.x = x;
r_rectdesc.rect.y = y;
r_rectdesc.rect.width = w;
r_rectdesc.rect.height = h;
vr.y = r_rectdesc.rect.y;
height = r_rectdesc.rect.height;
tileoffsety = vr.y % r_rectdesc.height;
while (height > 0) {
vr.x = r_rectdesc.rect.x;
width = r_rectdesc.rect.width;
if (tileoffsety != 0)
vr.height = r_rectdesc.height - tileoffsety;
else
vr.height = r_rectdesc.height;
if (vr.height > height)
vr.height = height;
tileoffsetx = vr.x % r_rectdesc.width;
while (width > 0) {
if (tileoffsetx != 0)
vr.width = r_rectdesc.width - tileoffsetx;
else
vr.width = r_rectdesc.width;
if (vr.width > width)
vr.width = width;
psrc = r_rectdesc.ptexbytes +
(tileoffsety * r_rectdesc.rowbytes) + tileoffsetx;
R_DrawRect (&vr, r_rectdesc.rowbytes, psrc, 0);
vr.x += vr.width;
width -= vr.width;
tileoffsetx = 0; // only the left tile can be left-clipped
}
vr.y += vr.height;
height -= vr.height;
tileoffsety = 0; // only the top tile can be top-clipped
}
}
/*
Draw_Fill
Fills a box of pixels with a single color
*/
VISIBLE void
Draw_Fill (int x, int y, int w, int h, int c)
{
byte *dest;
int u, v;
if (x < 0 || x + w > (int) vid.conwidth
|| y < 0 || y + h > (int) vid.conheight) {
Sys_Printf ("Bad Draw_Fill(%d, %d, %d, %d, %c)\n", x, y, w, h, c);
return;
}
dest = ((byte*)vid.buffer) + y * vid.rowbytes + x;
for (v = 0; v < h; v++, dest += vid.rowbytes)
for (u = 0; u < w; u++)
dest[u] = c;
}
VISIBLE void
Draw_FadeScreen (void)
{
unsigned int x, y;
byte *pbuf;
VID_UnlockBuffer ();
S_ExtraUpdate ();
VID_LockBuffer ();
for (y = 0; y < vid.conheight; y++) {
unsigned int t;
pbuf = ((byte *)vid.buffer) + vid.rowbytes * y;
t = (y & 1) << 1;
for (x = 0; x < vid.conwidth; x++) {
if ((x & 3) != t)
pbuf[x] = 0;
}
}
VID_UnlockBuffer ();
S_ExtraUpdate ();
VID_LockBuffer ();
}
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