Shared TDE VNC library sources
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libtdevnc/libvncserver/font.c

197 lines
4.8 KiB

#include <rfb/rfb.h>
int rfbDrawChar(rfbScreenInfoPtr rfbScreen,rfbFontDataPtr font,
int x,int y,unsigned char c,rfbPixel col)
{
int i,j,width,height;
unsigned char* data=font->data+font->metaData[c*5];
unsigned char d=*data;
int rowstride=rfbScreen->paddedWidthInBytes;
int bpp=rfbScreen->serverFormat.bitsPerPixel/8;
char *colour=(char*)&col;
if(!rfbEndianTest)
colour += 4-bpp;
width=font->metaData[c*5+1];
height=font->metaData[c*5+2];
x+=font->metaData[c*5+3];
y+=-font->metaData[c*5+4]-height+1;
for(j=0;j<height;j++) {
for(i=0;i<width;i++) {
if((i&7)==0) {
d=*data;
data++;
}
if(d&0x80 && y+j >= 0 && y+j < rfbScreen->height &&
x+i >= 0 && x+i < rfbScreen->width)
memcpy(rfbScreen->frameBuffer+(y+j)*rowstride+(x+i)*bpp,colour,bpp);
d<<=1;
}
/* if((i&7)!=0) data++; */
}
return(width);
}
void rfbDrawString(rfbScreenInfoPtr rfbScreen,rfbFontDataPtr font,
int x,int y,const char* string,rfbPixel colour)
{
while(*string) {
x+=rfbDrawChar(rfbScreen,font,x,y,*string,colour);
string++;
}
}
/* TODO: these two functions need to be more efficient */
/* if col==bcol, assume transparent background */
int rfbDrawCharWithClip(rfbScreenInfoPtr rfbScreen,rfbFontDataPtr font,
int x,int y,unsigned char c,
int x1,int y1,int x2,int y2,
rfbPixel col,rfbPixel bcol)
{
int i,j,width,height;
unsigned char* data=font->data+font->metaData[c*5];
unsigned char d;
int rowstride=rfbScreen->paddedWidthInBytes;
int bpp=rfbScreen->serverFormat.bitsPerPixel/8,extra_bytes=0;
char* colour=(char*)&col;
char* bcolour=(char*)&bcol;
if(!rfbEndianTest) {
colour+=4-bpp;
bcolour+=4-bpp;
}
width=font->metaData[c*5+1];
height=font->metaData[c*5+2];
x+=font->metaData[c*5+3];
y+=-font->metaData[c*5+4]-height+1;
/* after clipping, x2 will be count of bytes between rows,
* x1 start of i, y1 start of j, width and height will be adjusted. */
if(y1>y) { y1-=y; data+=(width+7)/8; height-=y1; y+=y1; } else y1=0;
if(x1>x) { x1-=x; data+=x1; width-=x1; x+=x1; extra_bytes+=x1/8; } else x1=0;
if(y2<y+height) height-=y+height-y2;
if(x2<x+width) { extra_bytes+=(x1+width)/8-(x+width-x2+7)/8; width-=x+width-x2; }
d=*data;
for(j=y1;j<height;j++) {
if((x1&7)!=0)
d=data[-1]; /* TODO: check if in this case extra_bytes is correct! */
for(i=x1;i<width;i++) {
if((i&7)==0) {
d=*data;
data++;
}
/* if(x+i>=x1 && x+i<x2 && y+j>=y1 && y+j<y2) */ {
if(d&0x80) {
memcpy(rfbScreen->frameBuffer+(y+j)*rowstride+(x+i)*bpp,
colour,bpp);
} else if(bcol!=col) {
memcpy(rfbScreen->frameBuffer+(y+j)*rowstride+(x+i)*bpp,
bcolour,bpp);
}
}
d<<=1;
}
/* if((i&7)==0) data++; */
data += extra_bytes;
}
return(width);
}
void rfbDrawStringWithClip(rfbScreenInfoPtr rfbScreen,rfbFontDataPtr font,
int x,int y,const char* string,
int x1,int y1,int x2,int y2,
rfbPixel colour,rfbPixel backColour)
{
while(*string) {
x+=rfbDrawCharWithClip(rfbScreen,font,x,y,*string,x1,y1,x2,y2,
colour,backColour);
string++;
}
}
int rfbWidthOfString(rfbFontDataPtr font,const char* string)
{
int i=0;
while(*string) {
i+=font->metaData[*string*5+1];
string++;
}
return(i);
}
int rfbWidthOfChar(rfbFontDataPtr font,unsigned char c)
{
return(font->metaData[c*5+1]+font->metaData[c*5+3]);
}
void rfbFontBBox(rfbFontDataPtr font,unsigned char c,int* x1,int* y1,int* x2,int* y2)
{
*x1+=font->metaData[c*5+3];
*y1+=-font->metaData[c*5+4]-font->metaData[c*5+2]+1;
*x2=*x1+font->metaData[c*5+1]+1;
*y2=*y1+font->metaData[c*5+2]+1;
}
#ifndef INT_MAX
#define INT_MAX 0x7fffffff
#endif
void rfbWholeFontBBox(rfbFontDataPtr font,
int *x1, int *y1, int *x2, int *y2)
{
int i;
int* m=font->metaData;
(*x1)=(*y1)=INT_MAX; (*x2)=(*y2)=1-(INT_MAX);
for(i=0;i<256;i++) {
if(m[i*5+1]-m[i*5+3]>(*x2))
(*x2)=m[i*5+1]-m[i*5+3];
if(-m[i*5+2]+m[i*5+4]<(*y1))
(*y1)=-m[i*5+2]+m[i*5+4];
if(m[i*5+3]<(*x1))
(*x1)=m[i*5+3];
if(-m[i*5+4]>(*y2))
(*y2)=-m[i*5+4];
}
(*x2)++;
(*y2)++;
}
rfbFontDataPtr rfbLoadConsoleFont(char *filename)
{
FILE *f=fopen(filename,"rb");
rfbFontDataPtr p;
int i;
if(!f) return NULL;
p=(rfbFontDataPtr)malloc(sizeof(rfbFontData));
p->data=(unsigned char*)malloc(4096);
if(1!=fread(p->data,4096,1,f)) {
free(p->data);
free(p);
fclose(f);
return NULL;
}
fclose(f);
p->metaData=(int*)malloc(256*5*sizeof(int));
for(i=0;i<256;i++) {
p->metaData[i*5+0]=i*16; /* offset */
p->metaData[i*5+1]=8; /* width */
p->metaData[i*5+2]=16; /* height */
p->metaData[i*5+3]=0; /* xhot */
p->metaData[i*5+4]=0; /* yhot */
}
return(p);
}
void rfbFreeFont(rfbFontDataPtr f)
{
free(f->data);
free(f->metaData);
free(f);
}