19 ldrawop(Memimage *dst, Rectangle screenr, Rectangle clipr, void *etc, int insave)
23 Rectangle oclipr, srcr, r, mr;
27 if(insave && d->dstlayer->save==nil)
30 p0 = addpt(screenr.min, d->deltas);
31 p1 = addpt(screenr.min, d->deltam);
34 r = rectsubpt(screenr, d->dstlayer->delta);
35 clipr = rectsubpt(clipr, d->dstlayer->delta);
39 /* now in logical coordinates */
41 /* clipr may have narrowed what we should draw on, so clip if necessary */
42 if(!rectinrect(r, clipr)){
45 ok = drawclip(dst, &r, d->src, &p0, d->mask, &p1, &srcr, &mr);
50 memdraw(dst, r, d->src, p0, d->mask, p1, d->op);
54 memdraw(Memimage *dst, Rectangle r, Memimage *src, Point p0, Memimage *mask, Point p1, int op)
57 Rectangle srcr, tr, mr;
61 iprint("memdraw %p %R %p %P %p %P\n", dst, r, src, p0, mask, p1);
67 if(drawdebug) iprint("mask->layer != nil\n");
68 return; /* too hard, at least for now */
72 if(dst->layer==nil && src->layer==nil){
73 memimagedraw(dst, r, src, p0, mask, p1, op);
77 if(drawclip(dst, &r, src, &p0, mask, &p1, &srcr, &mr) == 0){
78 if(drawdebug) iprint("drawclip dstcr %R srccr %R maskcr %R\n", dst->clipr, src->clipr, mask->clipr);
83 * Convert to screen coordinates.
87 r.min.x += dl->delta.x;
88 r.min.y += dl->delta.y;
89 r.max.x += dl->delta.x;
90 r.max.y += dl->delta.y;
93 if(dl!=nil && dl->clear){
97 src = dl->screen->image;
99 dst = dl->screen->image;
107 srcr.min.x += sl->delta.x;
108 srcr.min.y += sl->delta.y;
109 srcr.max.x += sl->delta.x;
110 srcr.max.y += sl->delta.y;
114 * Now everything is in screen coordinates.
115 * mask is an image. dst and src are images or obscured layers.
119 * if dst and src are the same layer, just draw in save area and expose.
121 if(dl!=nil && dst==src){
123 return; /* refresh function makes this case unworkable */
124 if(rectXrect(r, srcr)){
126 if(srcr.min.x < tr.min.x){
127 p1.x += tr.min.x - srcr.min.x;
128 tr.min.x = srcr.min.x;
130 if(srcr.min.y < tr.min.y){
131 p1.y += tr.min.x - srcr.min.x;
132 tr.min.y = srcr.min.y;
134 if(srcr.max.x > tr.max.x)
135 tr.max.x = srcr.max.x;
136 if(srcr.max.y > tr.max.y)
137 tr.max.y = srcr.max.y;
143 memdraw(dl->save, rectsubpt(r, dl->delta), dl->save,
144 subpt(srcr.min, src->layer->delta), mask, p1, op);
151 src = sl->screen->image;
153 r.min.x -= dl->delta.x;
154 r.min.y -= dl->delta.y;
155 r.max.x -= dl->delta.x;
156 r.max.y -= dl->delta.y;
160 /* relatively rare case; use save area */
162 return; /* refresh function makes this case unworkable */
164 /* convert back to logical coordinates */
167 srcr.min.x -= sl->delta.x;
168 srcr.min.y -= sl->delta.y;
169 srcr.max.x -= sl->delta.x;
170 srcr.max.y -= sl->delta.y;
171 src = src->layer->save;
175 * src is now an image. dst may be an image or a clear layer
179 if(dst->layer->clear)
183 * dst is an obscured layer
185 d.deltas = subpt(p0, r.min);
186 d.deltam = subpt(p1, r.min);
191 _memlayerop(ldrawop, dst, r, r, &d);