double x;
segment_dir_t dir;
fillstyle_t*fs;
+ edge_t*e; //only for debugging
int polygon_nr;
} renderpoint_t;
renderline_t*lines;
} renderbuf_t;
-static inline void add_pixel(renderbuf_t*buf, double x, int y, segment_dir_t dir, fillstyle_t*fs, int polygon_nr)
+static inline void add_pixel(renderbuf_t*buf, double x, int y, segment_dir_t dir, fillstyle_t*fs, int polygon_nr, edge_t*e)
{
renderpoint_t p;
p.x = x;
p.dir = dir;
p.fs = fs;
+ p.e = e;
p.polygon_nr = polygon_nr;
if(x >= buf->bbox.xmax || y >= buf->bbox.ymax || y < buf->bbox.ymin)
return;
+
renderline_t*l = &buf->lines[y-buf->bbox.ymin];
if(l->num == l->size) {
l->num++;
}
#define CUT 0.5
-#define INT(x) ((int)((x)+16)-16)
-static void add_line(renderbuf_t*buf, double x1, double y1, double x2, double y2, fillstyle_t*fs, int polygon_nr)
+static void add_line(renderbuf_t*buf, double x1, double y1, double x2, double y2, fillstyle_t*fs, int polygon_nr, edge_t*e)
{
x1 *= buf->zoom;
y1 *= buf->zoom;
}
diffx = x2 - x1;
diffy = y2 - y1;
- ny1 = INT(y1)+CUT;
- ny2 = INT(y2)+CUT;
+ ny1 = floor(y1)+CUT;
+ ny2 = floor(y2)+CUT;
if(ny1 < y1) {
- ny1 = INT(y1) + 1.0 + CUT;
+ ny1 = floor(y1) + 1.0 + CUT;
}
if(ny2 >= y2) {
- ny2 = INT(y2) - 1.0 + CUT;
+ ny2 = floor(y2) - 1.0 + CUT;
}
if(ny1 > ny2)
return;
x1 = x1 + (ny1-y1)*stepx;
x2 = x2 + (ny2-y2)*stepx;
- int posy=INT(ny1);
- int endy=INT(ny2);
+ int posy=floor(ny1);
+ int endy=floor(ny2);
double posx=0;
double startx = x1;
while(posy<=endy) {
double xx = startx + posx;
- add_pixel(buf, xx, posy, dir, fs, polygon_nr);
+ add_pixel(buf, xx, posy, dir, fs, polygon_nr, e);
posx+=stepx;
posy++;
}
edge_t*e;
int polygon_nr = 0;
for(e=polygon->edges;e;e=e->next) {
- add_line(buf, e->a.x, e->a.y, e->b.x, e->b.y, e->style, polygon_nr);
+ add_line(buf, e->a.x, e->a.y, e->b.x, e->b.y, e->style, polygon_nr, e);
}
for(y=0;y<buf->height;y++) {
lastx = x;
}
if(fill.is_filled && lastx!=buf->width) {
-
- return 0;// return an error, we're bleeding
-
- fill_bitwise(line, lastx, buf->width);
+ /* we're bleeding, fill over padding, too. */
+ fprintf(stderr, "Polygon %08x is bleeding in line %d\n", polygon, y);
+ fill_bitwise(line, lastx, width8*8);
}
}
intbbox_t b = {0,0,0,0};
edge_t*e = polygon->edges;
- zoom *= polygon->gridsize;
+ double g = zoom*polygon->gridsize;
if(e) {
- b.xmin = e->a.x*zoom;
- b.ymin = e->a.y*zoom;
- b.xmax = e->a.x*zoom;
- b.ymax = e->a.y*zoom;
+ b.xmin = e->a.x*g;
+ b.ymin = e->a.y*g;
+ b.xmax = e->a.x*g;
+ b.ymax = e->a.y*g;
}
for(e=polygon->edges;e;e=e->next) {
- double x_min = min(e->a.x,e->b.x)*zoom;
- double y_min = min(e->a.y,e->b.y)*zoom;
- double x_max = max(e->a.x,e->b.x)*zoom;
- double y_max = max(e->a.y,e->b.y)*zoom;
+ double x_min = min(e->a.x,e->b.x)*g;
+ double y_min = min(e->a.y,e->b.y)*g;
+ double x_max = max(e->a.x,e->b.x)*g;
+ double y_max = max(e->a.y,e->b.y)*g;
int x1 = floor(x_min);
int y1 = floor(y_min);
int x2 = ceil(x_max);
if(x1 < b.xmin) b.xmin = x1;
if(y1 < b.ymin) b.ymin = y1;
if(x2 > b.xmax) b.xmax = x2;
- if(y2 > b.xmax) b.ymax = y2;
+ if(y2 > b.ymax) b.ymax = y2;
}
+
if(b.xmax > (int)(MAX_WIDTH*zoom))
b.xmax = (int)(MAX_WIDTH*zoom);
if(b.ymax > (int)(MAX_HEIGHT*zoom))
b.xmin = b.xmax;
if(b.ymin > b.ymax)
b.ymin = b.ymax;
+
+ b.xmax += 8;
+ while(((b.xmax - b.xmin)&0x07) != 0x04)
+ b.xmax++;
b.width = b.xmax - b.xmin;
b.height = b.ymax - b.ymin;
#define B00000010 0x02
#define B00000001 0x01
+int bitmap_ok(intbbox_t*bbox, unsigned char*data)
+{
+ int y;
+ int width8 = (bbox->width+7) >> 3;
+ if((bbox->width&7) == 0)
+ return 1;
+ for(y=0;y<bbox->height;y++) {
+ if(data[width8-1]&0x01)
+ return 0; //bleeding
+ data += width8;
+ }
+ return 1;
+}
+
int compare_bitmaps(intbbox_t*bbox, unsigned char*data1, unsigned char*data2)
{
+ if(!data1 || !data2)
+ return 0;
int x,y;
int height = bbox->height;
int width = bbox->width;