ref: f2610965a9308c7f16fef90138ad2768ba162440
parent: a6d435a131bd7d0828a26257d89ef92223ac07eb
author: qwx <qwx@sciops.net>
date: Tue Jul 20 20:52:08 EDT 2021
vid: implement scaling from resolution
--- a/vid.c
+++ b/vid.c
@@ -14,14 +14,49 @@
typedef ulong PIXEL;
static int rwon;
-static uchar *fb;
+static uchar *fb, *fbs;
static Image *fbi;
static s32int fbpal[256];
+static int scaleon, scale = 1;
+static Rectangle fbr;
refexport_t GetRefAPI(refimport_t);
static void
+scalefb(void)
+{+ int dy, *p, c, *s;
+
+ if(scale < 2)
+ return;
+ p = (s32int *)fbs;
+ s = (s32int *)fb;
+ dy = vid.width * vid.height;
+ while(dy-- > 0){+ c = *s++;
+ switch(scale){+ case 16: p[15] = c;
+ case 15: p[14] = c;
+ case 14: p[13] = c;
+ case 13: p[12] = c;
+ case 12: p[11] = c;
+ case 11: p[10] = c;
+ case 10: p[9] = c;
+ case 9: p[8] = c;
+ case 8: p[7] = c;
+ case 7: p[6] = c;
+ case 6: p[5] = c;
+ case 5: p[4] = c;
+ case 4: p[3] = c;
+ case 3: p[2] = c;
+ case 2: p[1] = c; p[0] = c;
+ }
+ p += scale;
+ }
+}
+
+static void
drawfb(void)
{uchar *s;
@@ -77,18 +112,35 @@
{Point p;
- vid.width = Dx(screen->r);
- vid.height = Dy(screen->r);
- free(fb);
- fb = emalloc(vid.width * vid.height * sizeof *fbpal);
- freeimage(fbi);
- if((fbi = allocimage(display, Rect(0, 0, vid.width, vid.height), XRGB32, 0, 0)) == nil)
- sysfatal("allocimage: %r");- vid.buffer = fb;
+ if(scaleon){+ scale = Dx(screen->r) / vid.width;
+ if(scale <= 0)
+ scale = 1;
+ else if(scale > 16)
+ scale = 16;
+ }else{+ vid.width = Dx(screen->r);
+ vid.height = Dy(screen->r);
+ }
vid.rowbytes = vid.width * sizeof *fbpal;
- center = addpt(screen->r.min, Pt(vid.width/2, vid.height/2));
+ center = divpt(addpt(screen->r.min, screen->r.max), 2);
+ p = Pt(scale * vid.width/2, scale * vid.height/2);
+ fbr = Rpt(subpt(center, p), addpt(center, p));
p = Pt(vid.width/4, vid.height/4);
grabr = Rpt(subpt(center, p), addpt(center, p));
+ free(fb);
+ freeimage(fbi);
+ if((fbi = allocimage(display,
+ Rect(0, 0, vid.width * scale, scale > 1 ? 1 : vid.height),
+ XRGB32, scale > 1, 0)) == nil)
+ sysfatal("resetfb: %r");+ fb = emalloc(vid.rowbytes * vid.height);
+ if(scaleon){+ free(fbs);
+ fbs = emalloc(vid.rowbytes * scale * vid.height);
+ }
+ vid.buffer = fb;
+ draw(screen, screen->r, display->black, nil, ZP);
sw_mode->modified = true; /* make ref_soft refresh its shit */
}
@@ -95,6 +147,9 @@
void
flipfb(void)
{+ uchar *p;
+ Rectangle r;
+
if(resized){resized = 0;
if(getwindow(display, Refnone) < 0)
@@ -103,8 +158,20 @@
return;
}
drawfb();
- loadimage(fbi, fbi->r, fb, vid.height * vid.rowbytes);
- draw(screen, screen->r, fbi, nil, ZP);
+ scalefb();
+ if(scale == 1){+ loadimage(fbi, Rect(0,0,vid.width,vid.height), fb, vid.height * vid.rowbytes);
+ draw(screen, Rpt(fbr.min, Pt(fbr.max.x, fbr.max.y)), fbi, nil, ZP);
+ }else{+ p = fbs;
+ r = fbr;
+ while(r.min.y < fbr.max.y){+ r.max.y = r.min.y + scale;
+ p += loadimage(fbi, fbi->r, p, vid.rowbytes * scale);
+ draw(screen, r, fbi, nil, ZP);
+ r.min.y = r.max.y;
+ }
+ }
flushimage(display, 1);
if(dumpwin){if(writebit() < 0)
@@ -124,6 +191,33 @@
*fp++ = p[0] << 16 | p[1] << 8 | p[2];
}
+static void
+setscale(void)
+{+ char *s, *p;
+ static cvar_t *scale;
+
+ scale = Cvar_Get("scale", "", 0);+ if(strlen(scale->string) < 3+1+3)
+ return;
+ s = scale->string;
+ vid.width = strtol(s, &p, 10);
+ if(p == s || vid.width < 320){+ fprint(2, "setscale: invalid width %d\n", vid.width);
+ return;
+ }
+ if(*p++ != 'x'){+ fprint(2, "setscale: invalid resolution\n");
+ return;
+ }
+ vid.height = strtol(p, &s, 10);
+ if(p == s || vid.height < 200){+ fprint(2, "setscale: invalid height %d\n", vid.height);
+ return;
+ }
+ scaleon = 1;
+}
+
void
VID_Printf(int print_level, char *fmt, ...)
{@@ -175,6 +269,7 @@
ri.Vid_MenuInit = VID_MenuInit;
re = GetRefAPI(ri);
+ setscale();
re.Init();
resetfb();
}