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

61 lines
1.5 KiB

#include <rfb/rfb.h>
void rfbFillRect(rfbScreenInfoPtr s,int x1,int y1,int x2,int y2,rfbPixel col)
{
int rowstride = s->paddedWidthInBytes, bpp = s->bitsPerPixel>>3;
int i,j;
char* colour=(char*)&col;
if(!rfbEndianTest)
colour += 4-bpp;
for(j=y1;j<y2;j++)
for(i=x1;i<x2;i++)
memcpy(s->frameBuffer+j*rowstride+i*bpp,colour,bpp);
rfbMarkRectAsModified(s,x1,y1,x2,y2);
}
#define SETPIXEL(x,y) \
memcpy(s->frameBuffer+(y)*rowstride+(x)*bpp,colour,bpp)
void rfbDrawPixel(rfbScreenInfoPtr s,int x,int y,rfbPixel col)
{
int rowstride = s->paddedWidthInBytes, bpp = s->bitsPerPixel>>3;
char* colour=(char*)&col;
if(!rfbEndianTest)
colour += 4-bpp;
SETPIXEL(x,y);
rfbMarkRectAsModified(s,x,y,x+1,y+1);
}
void rfbDrawLine(rfbScreenInfoPtr s,int x1,int y1,int x2,int y2,rfbPixel col)
{
int rowstride = s->paddedWidthInBytes, bpp = s->bitsPerPixel>>3;
int i;
char* colour=(char*)&col;
if(!rfbEndianTest)
colour += 4-bpp;
#define SWAPPOINTS { i=x1; x1=x2; x2=i; i=y1; y1=y2; y2=i; }
if(abs(x1-x2)<abs(y1-y2)) {
if(y1>y2)
SWAPPOINTS
for(i=y1;i<=y2;i++)
SETPIXEL(x1+(i-y1)*(x2-x1)/(y2-y1),i);
/* TODO: Maybe make this more intelligently? */
if(x2<x1) { i=x1; x1=x2; x2=i; }
rfbMarkRectAsModified(s,x1,y1,x2+1,y2+1);
} else {
if(x1>x2)
SWAPPOINTS
else if(x1==x2) {
rfbDrawPixel(s,x1,y1,col);
return;
}
for(i=x1;i<=x2;i++)
SETPIXEL(i,y1+(i-x1)*(y2-y1)/(x2-x1));
if(y2<y1) { i=y1; y1=y2; y2=i; }
rfbMarkRectAsModified(s,x1,y1,x2+1,y2+1);
}
}