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display.cpp
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/*
project : wodeon, MPEG-1 video player for WindowsCE
author : omiokone
display.cpp : video output display
*/
// notice: this program assumes >> operator preserves sign for signed integer.
#include <windows.h>
#include "resource.h"
#include "wodeon.h"
static int sx, sy, sw, sh; // screen (display area) position, size
static int wx, wy, ww, wh; // window in picture
static int vx, vy, vw, vh; // viewport in screen
static HDC memDC=NULL;
static unsigned char convert[316];
static unsigned char palette[sizeof(LOGPALETTE)+sizeof(PALETTEENTRY)*226];
static int (*dither)[4];
// Bayer dither matrices
static int dither_BW4[2][4][4]={ // biased +30
{54, 22, 54, 22, // 2x2 for small picture
6, 38, 6, 38,
54, 22, 54, 22,
6, 38, 6, 38},
{60, 28, 52, 20, // 4x4 for large picture
12, 44, 4, 36,
48, 16, 56, 24,
0, 32, 8, 40}};
static int dither_BW16[2][4][4]={ // biased +8
{14, 6, 14, 6, // 2x2 for small picture
2, 10, 2, 10,
14, 6, 14, 6,
2, 10, 2, 10},
{16, 7, 14, 5, // 4x4 for large picture
3, 12, 1, 10,
13, 4, 15, 6,
0, 9, 2, 11}};
static int dither_C256[2][4][4]={
{ 3072, -960, 3072, -960, // 2x2 for small picture
-3072, 960, -3072, 960,
3072, -960, 3072, -960,
-3072, 960, -3072, 960},
{ 3840, -192, 2880, -1344, // 4x4 for large picture
-2304, 1728, -3264, 768,
2304, -1728, 3264, -768,
-3840, 192, -2880, 1344}};
static int dither_C4096[2][4][4]={
{ 1536, -512, 1536, -512, // 2x2 for small picture
-1536, 512, -1536, 512,
1536, -512, 1536, -512,
-1536, 512, -1536, 512},
{ 2048, -256, 1536, -768, // 4x4 for large picture
-1280, 1024, -1792, 512,
1280, -1024, 1792, -512,
-2048, 256, -1536, 768}};
// initialize display
void reset_display()
{
int i;
sw=GetSystemMetrics(SM_CXSCREEN);
sh=GetSystemMetrics(SM_CYSCREEN);
sx=sy=0;
if(!option.hide_buttons)
if(device==HPC){
sx=LEFT_MARGIN; sw-=LEFT_MARGIN;
}else{
sy=TOP_MARGIN; sh-=TOP_MARGIN;
}
if(!memDC) memDC=CreateCompatibleDC(NULL);
if(!memDC) error(IDS_ERR_DISPLAY);
if(option.display==BW4 || option.display==BW4F){
for(i= 0; i<= 29; i++) convert[i]=0;
for(i= 30; i<=285; i++) convert[i]=(i-30)>>6;
for(i=286; i<=315; i++) convert[i]=3;
}else
if(option.display==BW16){
for(i= 0; i<= 7; i++) convert[i]=0;
for(i= 8; i<=263; i++) convert[i]=(i-8)>>4;
for(i=264; i<=271; i++) convert[i]=15;
}
set_palette();
}
// wind up display
void close_display()
{
if(memDC) DeleteDC(memDC);
}
// prepare physical palette for 256 colors / 256 grayscale
void set_palette()
{
LOGPALETTE *pal=(LOGPALETTE *)palette;
PALETTEENTRY *pe;
HPALETTE hpal;
HDC hdc;
int i, r, g, b;
if(option.display!=BW256 && option.display!=C256) return;
pal->palVersion=0x0200;
pe=pal->palPalEntry+10; // 10 for system colors
if(option.display==BW256){ // 128 levels grayscale
pal->palNumEntries=128+10;
for(i=0; i<128; i++, pe++){
pe->peRed =
pe->peGreen=
pe->peBlue =i<<1;
pe->peFlags=0;
}
}else{ // 6*6*6 RGB
pal->palNumEntries=216+10;
for(b=0; b<6; b++)
for(g=0; g<6; g++)
for(r=0; r<6; r++, pe++){
pe->peRed =r*51;
pe->peGreen=g*51;
pe->peBlue =b*51;
pe->peFlags=0;
}
}
hdc=GetDC(main_window);
GetSystemPaletteEntries(hdc, 0, 10, pal->palPalEntry);
hpal=CreatePalette(pal);
if(hpal){
SelectPalette(hdc, hpal, FALSE);
RealizePalette(hdc);
DeleteObject(hpal);
}
ReleaseDC(main_window, hdc);
}
// set picture size
void set_display(
int pw, // I picture width
int ph // I picture height
)
{
int i;
if(option.mag2){
if(option.rotate){
vh=pw<<1;
if(vh<=sh) ww=pw, wx=0, vy=((sh-vh)>>1)+sy;
else ww=sh>>1, vh=ww<<1, wx=(pw-ww)>>1, vy=sy;
vw=ph<<1;
if(vw<=sw) wh=ph, wy=0, vx=((sw-vw)>>1)+sx;
else wh=sw>>1, vw=wh<<1, wy=(ph-wh)>>1, vx=sx;
}else{
vw=pw<<1;
if(vw<=sw) ww=pw, wx=0, vx=((sw-vw)>>1)+sx;
else ww=sw>>1, vw=ww<<1, wx=(pw-ww)>>1, vx=sx;
vh=ph<<1;
if(vh<=sh) wh=ph, wy=0, vy=((sh-vh)>>1)+sy;
else wh=sh>>1, vh=wh<<1, wy=(ph-wh)>>1, vy=sy;
}
}else{
if(option.rotate){
if(pw<=sh) ww=vh=pw, wx=0, vy=((sh-pw)>>1)+sy;
else ww=vh=sh, wx=(pw-sh)>>1, vy=sy;
if(ph<=sw) wh=vw=ph, wy=0, vx=((sw-ph)>>1)+sx;
else wh=vw=sw, wy=(ph-sw)>>1, vx=sx;
}else{
if(pw<=sw) ww=vw=pw, wx=0, vx=((sw-pw)>>1)+sx;
else ww=vw=sw, wx=(pw-sw)>>1, vx=sx;
if(ph<=sh) wh=vh=ph, wy=0, vy=((sh-ph)>>1)+sy;
else wh=vh=sh, wy=(ph-sh)>>1, vy=sy;
}
}
wx &=0xfffe; wy &=0xfffe; // for alignment of chrominance
i=(240<=pw || option.mag2)? 1: 0;
switch(option.display){
case BW4 :
case BW4F : dither=dither_BW4 [i]; break;
case BW16 : dither=dither_BW16 [i]; break;
case C256 : dither=dither_C256 [i]; break;
case C4096 : dither=dither_C4096[i]; break;
}
}
// make bitmap image (D: magnify x 2)
static void map_BW4(
y_buffer ly, // I luminance
c_buffer , // not used
c_buffer , // not used
unsigned char *map // O bitmap image
)
{
int xd, yd, i, x, y, *d;
unsigned char *lyp, byte;
if(option.rotate){
xd=HORIZONTAL_SIZE; yd=-HORIZONTAL_SIZE*vw-1; i=vh-1;
}else{
xd=1; yd= HORIZONTAL_SIZE-vw; i=0;
}
lyp= & ly[wy][wx];
for(y=0; y<vh; y++, i+=yd){
d=dither[y & 0x3];
for(x=0; x<vw; x++, i+=xd){
byte=(byte<<2) | convert[lyp[i]+d[x & 0x3]];
if((x & 0x3)==3) *map++=byte;
}
}
}
static void map_BW4D(
y_buffer ly, // I luminance
c_buffer , // not used
c_buffer , // not used
unsigned char *map // O bitmap image
)
{
int xd, yd, i, line, x, y, *d0, *d1, xr, c;
unsigned char *lyp, byte0, byte1;
if(option.rotate){
xd=HORIZONTAL_SIZE; yd=-HORIZONTAL_SIZE*(vw>>1)-1; i=ww-1;
}else{
xd=1; yd= HORIZONTAL_SIZE-(vw>>1); i=0;
}
lyp= & ly[wy][wx]; line=vw>>2;
for(y=0; y<vh; y+=2, i+=yd, map+=line){
d0=dither[y & 0x3]; d1=dither[(y & 0x3)+1];
for(x=0; x<vw; x+=2, i+=xd){
xr=x & 0x3; c=lyp[i];
byte0=(byte0<<2 | convert[c+d0[xr]])<<2 | convert[c+d0[xr+1]];
byte1=(byte1<<2 | convert[c+d1[xr]])<<2 | convert[c+d1[xr+1]];
if(xr==2){
*map=byte0; *(map++ +line)=byte1;
}
}
}
}
static void map_BW16(
y_buffer ly, // I luminance
c_buffer , // not used
c_buffer , // not used
unsigned char *map // O bitmap image
)
{
int xd, yd, i, x, y, *d;
unsigned char *lyp, byte;
if(option.rotate){
xd=HORIZONTAL_SIZE; yd=-HORIZONTAL_SIZE*vw-1; i=vh-1;
}else{
xd=1; yd= HORIZONTAL_SIZE-vw; i=0;
}
lyp= & ly[wy][wx];
for(y=0; y<vh; y++, i+=yd){
d=dither[y & 0x3];
for(x=0; x<vw; x++, i+=xd){
byte=(byte <<4) | convert[lyp[i]+d[x & 0x3]];
if(x & 0x1) *map++=byte;
}
}
}
static void map_BW16D(
y_buffer ly, // I luminance
c_buffer , // not used
c_buffer , // not used
unsigned char *map // O bitmap image
)
{
int xd, yd, i, line, x, y, *d0, *d1, xr, c;
unsigned char *lyp;
if(option.rotate){
xd=HORIZONTAL_SIZE; yd=-HORIZONTAL_SIZE*(vw>>1)-1; i=ww-1;
}else{
xd=1; yd= HORIZONTAL_SIZE-(vw>>1); i=0;
}
lyp= & ly[wy][wx]; line=vw>>1;
for(y=0; y<vh; y+=2, i+=yd, map+=line){
d0=dither[y & 0x3]; d1=dither[(y & 0x3)+1];
for(x=0; x<vw; x+=2, i+=xd){
xr=x & 0x3; c=lyp[i];
* map =convert[c+d0[xr]]<<4 | convert[c+d0[xr+1]];
*(map++ +line)=convert[c+d1[xr]]<<4 | convert[c+d1[xr+1]];
}
}
}
static void map_BW256(
y_buffer ly, // I luminance
c_buffer , // not used
c_buffer , // not used
unsigned char *map // O bitmap image
)
{
int xd, yd, i, x, y;
unsigned char *lyp;
if(option.rotate){
xd=HORIZONTAL_SIZE; yd=-HORIZONTAL_SIZE*vw-1; i=vh-1;
}else{
xd=1; yd= HORIZONTAL_SIZE-vw; i=0;
}
lyp= & ly[wy][wx];
for(y=0; y<vh; y++, i+=yd)
for(x=0; x<vw; x++, i+=xd) *map++=(lyp[i]>>1)+10;
}
static void map_BW256D(
y_buffer ly, // I luminance
c_buffer , // not used
c_buffer , // not used
unsigned char *map // O bitmap image
)
{
int xd, yd, i, x, y;
unsigned char *lyp, *mp;
if(option.rotate){
xd=HORIZONTAL_SIZE; yd=-HORIZONTAL_SIZE*(vw>>1)-1; i=ww-1;
}else{
xd=1; yd= HORIZONTAL_SIZE-(vw>>1); i=0;
}
lyp= & ly[wy][wx]; mp=map;
for(y=0; y<vh; y+=2, i+=yd, mp+=vw)
for(x=0; x<vw; x+=2, i+=xd, mp+=2) *mp=(lyp[i]>>1)+10;
mp=map+1; // fill gap pixels
for(y=0; y<vh; y+=2, mp+=vw+2){
for(x=3; x<vw; x+=2, mp+=2) *mp=(*(mp-1) + *(mp+1))>>1;
*mp=*(mp-1);
}
mp=map+vw;
for(y=3; y<vh; y+=2, mp+=vw)
for(x=0; x<vw; x++, mp++) *mp=(*(mp-vw) + *(mp+vw))>>1;
for(x=0; x<vw; x++, mp++) *mp=*(mp-vw);
}
static void map_BW(
y_buffer ly, // I luminance
c_buffer , // not used
c_buffer , // not used
unsigned char *map // O bitmap image
)
{
int xd, yd, i, x, y;
unsigned char *lyp, c;
if(option.rotate){
xd=HORIZONTAL_SIZE; yd=-HORIZONTAL_SIZE*vw-1; i=vh-1;
}else{
xd=1; yd= HORIZONTAL_SIZE-vw; i=0;
}
lyp= & ly[wy][wx];
for(y=0; y<vh; y++, i+=yd)
for(x=0; x<vw; x++, i+=xd){
c=lyp[i]; *map++=c; *map++=c; *map++=c;
}
}
static void map_BWD(
y_buffer ly, // I luminance
c_buffer , // not used
c_buffer , // not used
unsigned char *map // O bitmap image
)
{
int xd, yd, i, x, y, vw3;
unsigned char *lyp, *mp, c;
if(option.rotate){
xd=HORIZONTAL_SIZE; yd=-HORIZONTAL_SIZE*(vw>>1)-1; i=ww-1;
}else{
xd=1; yd= HORIZONTAL_SIZE-(vw>>1); i=0;
}
lyp= & ly[wy][wx]; mp=map; vw3=vw*3;
for(y=0; y<vh; y+=2, i+=yd, mp+=vw3)
for(x=0; x<vw; x+=2, i+=xd, mp+=3){
c=lyp[i]; *mp++=c; *mp++=c; *mp++=c;
}
mp=map+3; // fill gap pixels
for(y=0; y<vh; y+=2, mp+=vw3+3){
for(x=3; x<vw; x+=2, mp+=3){
c=(*(mp-3) + *(mp+3))>>1; *mp++=c; *mp++=c; *mp++=c;
}
c=*(mp-3); *mp++=c; *mp++=c; *mp++=c;
}
mp=map+vw3;
for(y=3; y<vh; y+=2, mp+=vw3)
for(x=0; x<vw; x++){
c=(*(mp-vw3) + *(mp+vw3))>>1; *mp++=c; *mp++=c; *mp++=c;
}
for(x=0; x<vw; x++){
c=*(mp-vw3); *mp++=c; *mp++=c; *mp++=c;
}
}
static void map_C256(
y_buffer ly, // I luminance
c_buffer cb, // I chrominance Cb
c_buffer cr, // I chrominance Cr
unsigned char *map // O bitmap image
)
{
int xd, yd, i, x, y, w, u, v, r, g, b, *d;
unsigned char *lyp, *cbp, *crp;
if(option.rotate){
wh=vw; xd=-vw; yd=vh*vw+1; i=(vh-1)*vw;
}else{
ww=vw; xd=1; yd=0; i=0;
}
lyp= & ly[wy][wx];
cbp= & cb[wy>>1][wx>>1];
crp= & cr[wy>>1][wx>>1];
for(y=0; y<wh; y++, i+=yd){
d=dither[y & 0x3];
for(x=0; x<ww; x++, i+=xd){
w=*lyp++ *192 +d[x & 0x3]; u=*cbp-128; v=*crp-128;
r=(w +269*v)>>13; if(5< r) r=5; else if(r <0) r=0;
g=(w - 66*u -137*v)>>13; if(5< g) g=5; else if(g <0) g=0;
b=(w +340*u )>>13; if(5< b) b=5; else if(b <0) b=0;
map[i]=(b*6+g)*6+r+10;
if(x & 1) cbp++, crp++;
}
lyp+=HORIZONTAL_SIZE-ww;
cbp-=ww>>1; crp-=ww>>1;
if(y & 1) cbp+=HORIZONTAL_SIZE>>1, crp+=HORIZONTAL_SIZE>>1;
}
}
static void map_C256D(
y_buffer ly, // I luminance
c_buffer cb, // I chrominance Cb
c_buffer cr, // I chrominance Cr
unsigned char *map // O bitmap image
)
{
int xd, yd, i, j, k, x, y, xr, yr, d, n;
int w, u, v, r, g, b, rt, gt, bt;
unsigned char *lyp, *cbp, *crp;
if(option.rotate){
xd=-vw<<1; yd=vh*vw+2; i=(vh-2)*vw;
}else{
xd=2; yd=vw; i=0;
}
lyp= & ly[wy][wx];
cbp= & cb[wy>>1][wx>>1];
crp= & cr[wy>>1][wx>>1];
for(y=0; y<wh; y++, i+=yd){
yr=(y&1)<<1;
for(x=0; x<ww; x++, i+=xd){
xr=(x&1)<<1;
w=*lyp++ *192; u=*cbp-128; v=*crp-128;
rt=w +269*v;
gt=w - 66*u -137*v;
bt=w +340*u;
for(k=0, n=0; k<2; k++, n=vw) for(j=0; j<2; j++){
d=dither[yr+k][xr+j];
r=(rt+d)>>13; if(5< r) r=5; else if(r <0) r=0;
g=(gt+d)>>13; if(5< g) g=5; else if(g <0) g=0;
b=(bt+d)>>13; if(5< b) b=5; else if(b <0) b=0;
map[i+j+n]=(b*6+g)*6+r+10;
}
if(xr) cbp++, crp++;
}
lyp+=HORIZONTAL_SIZE-ww;
cbp-=ww>>1; crp-=ww>>1;
if(yr) cbp+=HORIZONTAL_SIZE>>1, crp+=HORIZONTAL_SIZE>>1;
}
}
static void map_C4096(
y_buffer ly, // I luminance
c_buffer cb, // I chrominance Cb
c_buffer cr, // I chrominance Cr
unsigned char *map // O bitmap image
)
{
int xd, yd, i, x, y, w, u, v, r, g, b, *d;
unsigned char *lyp, *cbp, *crp;
if(option.rotate){
xd=-vw; yd=vh*vw+1; i=(vh-1)*vw;
}else{
xd=1; yd=0; i=0;
}
lyp= & ly[wy][wx];
cbp= & cb[wy>>1][wx>>1];
crp= & cr[wy>>1][wx>>1];
for(y=0; y<wh; y++, i+=yd){
d=dither[y & 0x3];
for(x=0; x<ww; x++, i+=xd){
w=(*lyp++ <<8)+d[x & 0x3]; u=*cbp-128; v=*crp-128;
r=(w +359*v)>>11; if(31< r) r=31; else if(r <0) r=0;
g=(w - 88*u -183*v)>>10; if(63< g) g=63; else if(g <0) g=0;
b=(w +454*u )>>11; if(31< b) b=31; else if(b <0) b=0;
((WORD *)map)[i]= r<<11 | g<<5 | b;
if(x & 1) cbp++, crp++;
}
lyp+=HORIZONTAL_SIZE-ww;
cbp-=ww>>1; crp-=ww>>1;
if(y & 1) cbp+=HORIZONTAL_SIZE>>1, crp+=HORIZONTAL_SIZE>>1;
}
}
static void map_C4096D(
y_buffer ly, // I luminance
c_buffer cb, // I chrominance Cb
c_buffer cr, // I chrominance Cr
unsigned char *map // O bitmap image
)
{
int xd, yd, i, j, k, x, y, xr, yr, d, n;
int w, u, v, r, g, b, rt, gt, bt;
unsigned char *lyp, *cbp, *crp;
if(option.rotate){
xd=-vw<<1; yd=vh*vw+2; i=(vh-2)*vw;
}else{
xd=2; yd=vw; i=0;
}
lyp= & ly[wy][wx];
cbp= & cb[wy>>1][wx>>1];
crp= & cr[wy>>1][wx>>1];
for(y=0; y<wh; y++, i+=yd){
yr=(y&1)<<1;
for(x=0; x<ww; x++, i+=xd){
xr=(x&1)<<1;
w=*lyp++ <<8; u=*cbp-128; v=*crp-128;
rt=w +359*v;
gt=w - 88*u -183*v;
bt=w +454*u;
for(k=0, n=0; k<2; k++, n=vw) for(j=0; j<2; j++){
d=dither[yr+k][xr+j];
r=(rt+d)>>11; if(31< r) r=31; else if(r <0) r=0;
g=(gt+d)>>10; if(63< g) g=63; else if(g <0) g=0;
b=(bt+d)>>11; if(31< b) b=31; else if(b <0) b=0;
((WORD *)map)[i+j+n]= r<<11 | g<<5 | b;
}
if(xr) cbp++, crp++;
}
lyp+=HORIZONTAL_SIZE-ww;
cbp-=ww>>1; crp-=ww>>1;
if(yr) cbp+=HORIZONTAL_SIZE>>1, crp+=HORIZONTAL_SIZE>>1;
}
}
static void map_C65536(
y_buffer ly, // I luminance
c_buffer cb, // I chrominance Cb
c_buffer cr, // I chrominance Cr
unsigned char *map // O bitmap image
)
{
int xd, yd, i, x, y, w, u, v, r, g, b;
unsigned char *lyp, *cbp, *crp;
if(option.rotate){
xd=-vw; yd=vh*vw+1; i=(vh-1)*vw;
}else{
xd=1; yd=0; i=0;
}
lyp= & ly[wy][wx];
cbp= & cb[wy>>1][wx>>1];
crp= & cr[wy>>1][wx>>1];
for(y=0; y<wh; y++, i+=yd){
for(x=0; x<ww; x++, i+=xd){
w=*lyp++ <<8; u=*cbp-128; v=*crp-128;
r=(w +359*v)>>11; if(31< r) r=31; else if(r <0) r=0;
g=(w - 88*u -183*v)>>10; if(63< g) g=63; else if(g <0) g=0;
b=(w +454*u )>>11; if(31< b) b=31; else if(b <0) b=0;
((WORD *)map)[i]= r<<11 | g<<5 | b;
if(x & 1) cbp++, crp++;
}
lyp+=HORIZONTAL_SIZE-ww;
cbp-=ww>>1; crp-=ww>>1;
if(y & 1) cbp+=HORIZONTAL_SIZE>>1, crp+=HORIZONTAL_SIZE>>1;
}
}
static void map_C65536D(
y_buffer ly, // I luminance
c_buffer cb, // I chrominance Cb
c_buffer cr, // I chrominance Cr
unsigned char *map // O bitmap image
)
{
int xd, yd, i, x, y, w, u, v, r, g, b;
unsigned char *lyp, *cbp, *crp;
WORD *mp;
if(option.rotate){
xd=-vw<<1; yd=vh*vw+2; i=(vh-2)*vw;
}else{
xd=2; yd=vw; i=0;
}
lyp= & ly[wy][wx];
cbp= & cb[wy>>1][wx>>1];
crp= & cr[wy>>1][wx>>1];
for(y=0; y<wh; y++, i+=yd){
for(x=0; x<ww; x++, i+=xd){
w=*lyp++ <<8; u=*cbp-128; v=*crp-128;
r=(w +359*v)>>11; if(31< r) r=31; else if(r <0) r=0;
g=(w - 88*u -183*v)>>10; if(63< g) g=63; else if(g <0) g=0;
b=(w +454*u )>>11; if(31< b) b=31; else if(b <0) b=0;
((WORD *)map)[i]= r<<11 | g<<5 | b;
if(x & 1) cbp++, crp++;
}
lyp+=HORIZONTAL_SIZE-ww;
cbp-=ww>>1; crp-=ww>>1;
if(y & 1) cbp+=HORIZONTAL_SIZE>>1, crp+=HORIZONTAL_SIZE>>1;
}
mp=(WORD *)map+1; // fill gap pixels
for(y=0; y<vh; y+=2, mp+=vw+2){
for(x=3; x<vw; x+=2, mp+=2)
*mp=((*(mp-1) & 0xf800)+(*(mp+1) & 0xf800))>>1 & 0xf800 |
((*(mp-1) & 0x07e0)+(*(mp+1) & 0x07e0))>>1 & 0x07e0 |
((*(mp-1) & 0x001f)+(*(mp+1) & 0x001f))>>1 & 0x001f;
*mp=*(mp-1);
}
mp=(WORD *)map+vw;
for(y=3; y<vh; y+=2, mp+=vw)
for(x=0; x<vw; x++, mp++)
*mp=((*(mp-vw) & 0xf800)+(*(mp+vw) & 0xf800))>>1 & 0xf800 |
((*(mp-vw) & 0x07e0)+(*(mp+vw) & 0x07e0))>>1 & 0x07e0 |
((*(mp-vw) & 0x001f)+(*(mp+vw) & 0x001f))>>1 & 0x001f;
for(x=0; x<vw; x++, mp++) *mp=*(mp-vw);
}
static void map_COLOR(
y_buffer ly, // I luminance
c_buffer cb, // I chrominance Cb
c_buffer cr, // I chrominance Cr
unsigned char *map // O bitmap image
)
{
int xd, yd, i, x, y, w, u, v, r, g, b;
unsigned char *lyp, *cbp, *crp;
if(option.rotate){
wh=vw; xd=-3*vw; yd=3*(vh*vw+1); i=3*(vh-1)*vw;
}else{
ww=vw; xd=3; yd=0; i=0;
}
lyp= & ly[wy][wx];
cbp= & cb[wy>>1][wx>>1];
crp= & cr[wy>>1][wx>>1];
for(y=0; y<wh; y++, i+=yd){
for(x=0; x<ww; x++, i+=xd){
w=*lyp++ <<8; u=*cbp-128; v=*crp-128;
r=(w +359*v)>>8; if(255< r) r=255; else if(r <0) r=0;
g=(w - 88*u -183*v)>>8; if(255< g) g=255; else if(g <0) g=0;
b=(w +454*u )>>8; if(255< b) b=255; else if(b <0) b=0;
map[i]=b; map[i+1]=g; map[i+2]=r;
if(x & 1) cbp++, crp++;
}
lyp+=HORIZONTAL_SIZE-ww;
cbp-=ww>>1; crp-=ww>>1;
if(y & 1) cbp+=HORIZONTAL_SIZE>>1, crp+=HORIZONTAL_SIZE>>1;
}
}
static void map_COLORD(
y_buffer ly, // I luminance
c_buffer cb, // I chrominance Cb
c_buffer cr, // I chrominance Cr
unsigned char *map // O bitmap image
)
{
int xd, yd, i, x, y, w, u, v, r, g, b, vw3;
unsigned char *lyp, *cbp, *crp, *mp;
vw3=vw*3;
if(option.rotate){
wh=vw>>1; xd=-6*vw; yd=3*(vh*vw+2); i=3*(vh-2)*vw;
}else{
ww=vw>>1; xd=6; yd=vw3; i=0;
}
lyp= & ly[wy][wx];
cbp= & cb[wy>>1][wx>>1];
crp= & cr[wy>>1][wx>>1];
for(y=0; y<wh; y++, i+=yd){
for(x=0; x<ww; x++, i+=xd){
w=*lyp++ <<8; u=*cbp-128; v=*crp-128;
r=(w +359*v)>>8; if(255< r) r=255; else if(r <0) r=0;
g=(w - 88*u -183*v)>>8; if(255< g) g=255; else if(g <0) g=0;
b=(w +454*u )>>8; if(255< b) b=255; else if(b <0) b=0;
map[i]=b; map[i+1]=g; map[i+2]=r;
if(x & 1) cbp++, crp++;
}
lyp+=HORIZONTAL_SIZE-ww;
cbp-=ww>>1; crp-=ww>>1;
if(y & 1) cbp+=HORIZONTAL_SIZE>>1, crp+=HORIZONTAL_SIZE>>1;
}
mp=map+3; // fill gap pixels
for(y=0; y<vh; y+=2, mp+=vw3+6){
for(x=3; x<vw; x+=2, mp+=6){
* mp =(*(mp-3) + *(mp+3))>>1;
*(mp+1)=(*(mp-2) + *(mp+4))>>1;
*(mp+2)=(*(mp-1) + *(mp+5))>>1;
}
*mp=*(mp-3); *(mp+1)=*(mp-2); *(mp+2)=*(mp-1);
}
mp=map+vw3;
for(y=3; y<vh; y+=2, mp+=vw3)
for(x=0; x<vw; x++){
*mp=(*(mp-vw3) + *(mp+vw3))>>1; mp++;
*mp=(*(mp-vw3) + *(mp+vw3))>>1; mp++;
*mp=(*(mp-vw3) + *(mp+vw3))>>1; mp++;
}
for(x=0; x<vw; x++){
*mp=*(mp-vw3); mp++; *mp=*(mp-vw3); mp++; *mp=*(mp-vw3); mp++;
}
}
// hardware specific parameters
static struct display_param{
int align; // width mask for line alignment
WORD bpp;
DWORD compression;
UINT usage;
void (*map )(y_buffer, c_buffer, c_buffer, unsigned char *);
void (*mapD)(y_buffer, c_buffer, c_buffer, unsigned char *);
} dparam[]={
{0xfff8, 2, 0, 0, map_BW4, map_BW4D },
{0xfff0, 2, BI_RGB, DIB_PAL_COLORS, map_BW4, map_BW4D },
{0xfff8, 4, BI_RGB, DIB_PAL_COLORS, map_BW16, map_BW16D },
{0xfffc, 8, BI_RGB, DIB_PAL_COLORS, map_BW256, map_BW256D },
{0xfffc, 24, BI_RGB, DIB_RGB_COLORS, map_BW, map_BWD },
{0xfffc, 8, BI_RGB, DIB_PAL_COLORS, map_C256, map_C256D },
{0xfffe, 16, BI_BITFIELDS, DIB_RGB_COLORS, map_C4096, map_C4096D },
{0xfffe, 16, BI_BITFIELDS, DIB_RGB_COLORS, map_C65536, map_C65536D},
{0xfffc, 24, BI_RGB, DIB_RGB_COLORS, map_COLOR, map_COLORD }
};
static struct{
BITMAPINFOHEADER bmiHeader;
RGBQUAD mask[3]; // for 565 16bits colors
} bmi={{sizeof(BITMAPINFOHEADER), 0, 0, 1, 0, 0, 0, 0, 0, 0, 0}};
// draw picture image on screen
void draw_picture(
y_buffer ly, // I luminance
c_buffer cb, // I chrominance Cb
c_buffer cr // I chrominance Cr
)
{
struct display_param *dp;
unsigned char *map;
HBITMAP hb, hold;
HDC hdc;
dp=& dparam[(int)option.display];
vw &=dp->align;
if(option.display==BW4){
map=(unsigned char *)malloc((vw*vh+3)>>2);
if(!map) error(IDS_ERR_MEMORY);
}else{
bmi.bmiHeader.biWidth = vw;
bmi.bmiHeader.biHeight =-vh;
bmi.bmiHeader.biBitCount =dp->bpp;
bmi.bmiHeader.biCompression =dp->compression;
*(DWORD *)(bmi.mask )=0x1f<<11; // for 565 16bits colors
*(DWORD *)(bmi.mask +1)=0x3f<<5;
*(DWORD *)(bmi.mask +2)=0x1f;
hdc=GetDC(NULL);
hb=CreateDIBSection(hdc, (BITMAPINFO *)&bmi, dp->usage,
(void **)&map, NULL, 0);
ReleaseDC(NULL, hdc);
if(!hb) error(IDS_ERR_DISPLAY);
}
if(option.mag2) dp->mapD(ly, cb, cr, map);
else dp->map (ly, cb, cr, map);
if(option.display==BW4){
hb=CreateBitmap(vw, vh, 1, 2, map);
free(map);
if(!hb) error(IDS_ERR_DISPLAY);
}
hold=SelectObject(memDC, hb);
hdc=GetDC(main_window);
BitBlt(hdc, vx, vy, vw, vh, memDC, 0, 0, SRCCOPY);
ReleaseDC(main_window, hdc);
SelectObject(memDC, hold);
DeleteObject(hb);
}