shithub: qk2

ref: a96f72a41fed2a20c363865b5860fcbfeec7c90d
dir: /plan9/rw_9.c/

#include <u.h>
#include <libc.h>
#include <draw.h>
#include <stdio.h>
#include <ctype.h>
#include "../q_shared.h"

qboolean rwon;
uchar *framebuf;
Image *fbim;
int resized;
Point center;

typedef ulong PIXEL;
PIXEL st2d_8to24table[256];
int shiftmask_fl;
int r_shift, g_shift, b_shift;
uint r_mask, g_mask, b_mask;


void shiftmask_init (void)
{
	uint x;

	r_mask = 0xff0000;
	g_mask = 0xff00;
	b_mask = 0xff;
	for(r_shift = -8, x = 1; x < r_mask; x <<= 1)
		r_shift++;
	for(g_shift = -8, x = 1; x < g_mask; x <<= 1)
		g_shift++;
	for(b_shift = -8, x = 1; x < b_mask; x <<= 1)
		b_shift++;
	shiftmask_fl = 1;
}

PIXEL rgb24 (int r, int g, int b)
{
	PIXEL p = 0;

	if(shiftmask_fl == 0)
		shiftmask_init();

	if(r_shift > 0)
		p = r<<r_shift & r_mask;
	else if(r_shift < 0)
        	p = r>>-r_shift & r_mask;
	else
		p |= r & r_mask;
	if(g_shift > 0)
		p |= g<<g_shift & g_mask;
	else if(g_shift < 0)
		p |= g>>-g_shift & g_mask;
	else
		p |= g & g_mask;
	if(b_shift > 0)
		p |= b<<b_shift & b_mask;
	else if(b_shift < 0)
		p |= b>>-b_shift & b_mask;
	else
		p |= b & b_mask;
	return p;
}

void st3_fixup (void)
{
	int x, y;
	uchar *src;
	PIXEL *dest;

	for(y = 0; y < vid.height; y++){
		src = &framebuf[y*vid.rowbytes];
		dest = (PIXEL*)src;

		/* vid.width % 8 not always 0
		for(x = vid.width-1; x >= 0; x -= 8) {
			dest[x  ] = st2d_8to24table[src[x  ]];
			dest[x-1] = st2d_8to24table[src[x-1]];
			dest[x-2] = st2d_8to24table[src[x-2]];
			dest[x-3] = st2d_8to24table[src[x-3]];
			dest[x-4] = st2d_8to24table[src[x-4]];
			dest[x-5] = st2d_8to24table[src[x-5]];
			dest[x-6] = st2d_8to24table[src[x-6]];
			dest[x-7] = st2d_8to24table[src[x-7]];
		}
		*/

		for(x = vid.width-1; x >= 0; x--)
			dest[x] = st2d_8to24table[src[x]];
	}
}

void resetfb (void)
{
	vid.width = Dx(screen->r);
	vid.height = Dy(screen->r);
	if(framebuf != nil){
		free(framebuf);
		framebuf = nil;
	}
	if(fbim != nil){
		freeimage(fbim);
		fbim = nil;
	}
	if((framebuf = malloc(sizeof *framebuf * vid.width * vid.height * screen->depth/8)) == nil)
		sysfatal("resetfb:malloc: %r");
	if((fbim = allocimage(display, Rect(0, 0, vid.width, vid.height), screen->chan, 1, DNofill)) == nil)
		sysfatal("resetfb: %r");
	vid.buffer = framebuf;
	vid.rowbytes = vid.width * screen->depth/8;
	center = addpt(screen->r.min, Pt(vid.width/2, vid.height/2));
	sw_mode->modified = true;	/* make ref_soft refresh its shit */
}

int SWimp_Init (void */*hInstance*/, void */*wndProc*/)
{
	srand(getpid());

	if(initdraw(nil, nil, "quake2") < 0)
		sysfatal("VID_Init:initdraw: %r\n");
	resetfb();
	rwon = true;
	return true;
}

/* copy backbuffer to front buffer */
void SWimp_EndFrame (void)
{
	if(resized){		/* skip frame if window resizes */
		resized = 0;
		if(getwindow(display, Refnone) < 0)
			sysfatal("SWimp_EndFrame:getwindow: %r\n");
		resetfb();
		return;
	}
	st3_fixup();
	loadimage(fbim, fbim->r, framebuf, vid.height * vid.rowbytes);
	draw(screen, screen->r, fbim, nil, ZP);
	flushimage(display, 1);
}

rserr_t SWimp_SetMode (int */*pwidth*/, int */*pheight*/, int /*mode*/, qboolean /*fullscreen*/)
{
	return rserr_ok;
}

/* nil palette == use existing; palette is expected to be in padded 4-byte xRGB format */
void SWimp_SetPalette (uchar *palette)
{
	int i;

	if(!rwon)
		return;
	if(!palette)
        	palette = (uchar *)sw_state.currentpalette;
	for(i = 0; i < 256; i++)
		st2d_8to24table[i] = rgb24(palette[i*4], palette[i*4+1], palette[i*4+2]);
}

void SWimp_Shutdown (void)
{
	if(!rwon)
		return;
	if(framebuf != nil)
		free(framebuf);
	if(fbim != nil)
		freeimage(fbim);
	rwon = false;
}

void SWimp_AppActivate (qboolean /*active*/)
{
}