ref: db9b193ab08b9e033e80887e31ac7cca8203d906
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); }