ref: 8e5f152d104f69afa38b12e80439d378a369c71d
dir: /qw/draw.c/
// draw.c -- this is the only file outside the refresh that touches the vid buffer
#include <u.h>
#include <libc.h>
#include <stdio.h>
#include "quakedef.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 menu_cachepics[MAX_CACHED_PICS];
int menu_numcachepics;
qpic_t *Draw_PicFromWad (char *name)
{
return W_GetLumpName (name);
}
/*
================
Draw_CachePic
================
*/
qpic_t *Draw_CachePic (char *path)
{
cachepic_t *pic;
int i;
qpic_t *dat;
for (pic=menu_cachepics, i=0 ; i<menu_numcachepics ; pic++, i++)
if (!strcmp (path, pic->name))
break;
if (i == menu_numcachepics)
{
if (menu_numcachepics == MAX_CACHED_PICS)
Sys_Error ("menu_numcachepics == MAX_CACHED_PICS");
menu_numcachepics++;
strcpy (pic->name, path);
}
dat = Cache_Check (&pic->cache);
if (dat)
return dat;
//
// load the pic from disk
//
COM_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;
}
/*
===============
Draw_Init
===============
*/
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.
================
*/
void Draw_Character (int x, int y, int num)
{
byte *dest;
byte *source;
int drawline;
int row, col;
num &= 255;
if (y <= -8)
return; // totally off screen
if (y > vid.height - 8 || x < 0 || x > vid.width - 8)
return;
if (num < 0 || num > 255)
return;
row = num>>4;
col = num&15;
source = draw_chars + (row<<10) + (col<<3);
if (y < 0)
{ // clipped
drawline = 8 + y;
source -= 128*y;
y = 0;
}
else
drawline = 8;
dest = 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;
}
}
/*
================
Draw_String
================
*/
void Draw_String (int x, int y, char *str)
{
while (*str)
{
Draw_Character (x, y, *str);
str++;
x += 8;
}
}
/*
================
Draw_Alt_String
================
*/
void Draw_Alt_String (int x, int y, char *str)
{
while (*str)
{
Draw_Character (x, y, (*str) | 0x80);
str++;
x += 8;
}
}
void Draw_Pixel(int x, int y, byte color)
{
byte *dest;
dest = vid.conbuffer + y*vid.conrowbytes + x;
*dest = color;
}
void Draw_Crosshair(void)
{
int x, y;
extern cvar_t crosshair, cl_crossx, cl_crossy, crosshaircolor;
extern vrect_t scr_vrect;
byte c = (byte)crosshaircolor.value;
if (crosshair.value == 2) {
x = scr_vrect.x + scr_vrect.width/2 + cl_crossx.value;
y = scr_vrect.y + scr_vrect.height/2 + cl_crossy.value;
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);
} else if (crosshair.value)
Draw_Character (
scr_vrect.x + scr_vrect.width/2-4 + cl_crossx.value,
scr_vrect.y + scr_vrect.height/2-4 + cl_crossy.value,
'+');
}
/*
================
Draw_DebugChar
Draws a single character directly to the upper right corner of the screen.
This is for debugging lockups by drawing different chars in different parts
of the code.
================
*/
void Draw_DebugChar (char num)
{
byte *dest;
byte *source;
int drawline;
extern byte *draw_chars;
int row, col;
if (!vid.direct)
return; // don't have direct FB access, so no debugchars...
drawline = 8;
row = num>>4;
col = num&15;
source = draw_chars + (row<<10) + (col<<3);
dest = vid.direct + 312;
while (drawline--)
{
dest[0] = source[0];
dest[1] = source[1];
dest[2] = source[2];
dest[3] = source[3];
dest[4] = source[4];
dest[5] = source[5];
dest[6] = source[6];
dest[7] = source[7];
source += 128;
dest += 320;
}
}
/*
=============
Draw_Pic
=============
*/
void Draw_Pic (int x, int y, qpic_t *pic)
{
byte *dest, *source;
int v;
if ((x < 0) ||
(x + pic->width > vid.width) ||
(y < 0) ||
(y + pic->height > vid.height))
{
Sys_Error ("Draw_Pic: bad coordinates");
}
source = pic->data;
dest = vid.buffer + y * vid.rowbytes + x;
for(v=0; v<pic->height; v++){
memcpy(dest, source, pic->width);
dest += vid.rowbytes;
source += pic->width;
}
}
/*
=============
Draw_SubPic
=============
*/
void Draw_SubPic(int x, int y, qpic_t *pic, int srcx, int srcy, int width, int height)
{
byte *dest, *source;
int v;
if ((x < 0) ||
(x + width > vid.width) ||
(y < 0) ||
(y + height > vid.height))
{
Sys_Error ("Draw_Pic: bad coordinates");
}
source = pic->data + srcy * pic->width + srcx;
dest = vid.buffer + y * vid.rowbytes + x;
for(v=0; v<height; v++){
memcpy(dest, source, width);
dest += vid.rowbytes;
source += pic->width;
}
}
/*
=============
Draw_TransPic
=============
*/
void Draw_TransPic (int x, int y, qpic_t *pic)
{
byte *dest, *source, tbyte;
int v, u;
if (x < 0 || (unsigned)(x + pic->width) > vid.width || y < 0 ||
(unsigned)(y + pic->height) > vid.height)
{
Sys_Error ("Draw_TransPic: bad coordinates");
}
source = pic->data;
dest = 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;
}
}
}
/*
=============
Draw_TransPicTranslate
=============
*/
void Draw_TransPicTranslate (int x, int y, qpic_t *pic, byte *translation)
{
byte *dest, *source, tbyte;
int v, u;
if (x < 0 || (unsigned)(x + pic->width) > vid.width || y < 0 ||
(unsigned)(y + pic->height) > vid.height)
{
Sys_Error ("Draw_TransPic: bad coordinates");
}
source = pic->data;
dest = 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] = translation[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] = translation[tbyte];
if((tbyte = source[u+1]) != TRANSPARENT_COLOR)
dest[u+1] = translation[tbyte];
if((tbyte = source[u+2]) != TRANSPARENT_COLOR)
dest[u+2] = translation[tbyte];
if((tbyte = source[u+3]) != TRANSPARENT_COLOR)
dest[u+3] = translation[tbyte];
if((tbyte = source[u+4]) != TRANSPARENT_COLOR)
dest[u+4] = translation[tbyte];
if((tbyte = source[u+5]) != TRANSPARENT_COLOR)
dest[u+5] = translation[tbyte];
if((tbyte = source[u+6]) != TRANSPARENT_COLOR)
dest[u+6] = translation[tbyte];
if((tbyte = source[u+7]) != TRANSPARENT_COLOR)
dest[u+7] = translation[tbyte];
}
dest += vid.rowbytes;
source += pic->width;
}
}
}
void Draw_CharToConback (int num, byte *dest)
{
int row, col;
byte *source;
int drawline;
int x;
row = num>>4;
col = num&15;
source = draw_chars + (row<<10) + (col<<3);
drawline = 8;
while (drawline--)
{
for (x=0 ; x<8 ; x++)
if (source[x])
dest[x] = 0x60 + source[x];
source += 128;
dest += 320;
}
}
/*
================
Draw_ConsoleBackground
================
*/
void Draw_ConsoleBackground (int lines)
{
int x, y, v;
byte *src, *dest;
int f, fstep;
qpic_t *conback;
char ver[100];
static char saveback[320*8];
conback = Draw_CachePic ("gfx/conback.lmp");
// hack the version number directly into the pic
//sprintf (ver, "start commands with a \\ character %4.2f", VERSION);
if (cls.download) {
sprintf (ver, "%4.2f", VERSION);
dest = conback->data + 320 + 320*186 - 11 - 8*strlen(ver);
} else {
sprint(ver, "(9) %4.2f QuakeWorld %4.2f", PLAN9_VERSION, VERSION);
dest = conback->data + 320 - (strlen(ver)*8 + 11) + 320*186;
}
memcpy(saveback, conback->data + 320*186, 320*8);
for (x=0 ; x<strlen(ver) ; x++)
Draw_CharToConback (ver[x], dest+(x<<3));
// 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<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;
}
}
}
// put it back
memcpy(conback->data + 320*186, saveback, 320*8);
}
/*
==============
R_DrawRect8
==============
*/
void R_DrawRect8 (vrect_t *prect, int rowbytes, byte *psrc,
int transparent)
{
byte t;
int i, j, srcdelta, destdelta;
byte *pdest;
pdest = 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.
=============
*/
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_DrawRect8 (&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
=============
*/
void Draw_Fill (int x, int y, int w, int h, int c)
{
byte *dest;
int u, v;
if (x < 0 || x + w > vid.width ||
y < 0 || y + h > vid.height) {
Con_Printf("Bad Draw_Fill(%d, %d, %d, %d, %c)\n",
x, y, w, h, c);
return;
}
dest = vid.buffer + y*vid.rowbytes + x;
for(v=0; v<h; v++, dest+=vid.rowbytes)
for(u=0; u<w; u++)
dest[u] = c;
}
//=============================================================================
/*
================
Draw_FadeScreen
================
*/
void Draw_FadeScreen (void)
{
int x,y;
byte *pbuf;
for (y=0 ; y<vid.height ; y++)
{
int t;
pbuf = (byte *)(vid.buffer + vid.rowbytes*y);
t = (y & 1) << 1;
for (x=0 ; x<vid.width ; x++)
{
if ((x & 3) != t)
pbuf[x] = 0;
}
}
}
//=============================================================================
/*
================
Draw_BeginDisc
Draws the little blue disc in the corner of the screen.
Call before beginning any disc IO.
================
*/
void Draw_BeginDisc (void)
{
D_BeginDirectRect (vid.width - 24, 0, draw_disc->data, 24, 24);
}
/*
================
Draw_EndDisc
Erases the disc icon.
Call after completing any disc IO
================
*/
void Draw_EndDisc (void)
{
D_EndDirectRect (vid.width - 24, 0, 24, 24);
}