1 324891a5 2006-06-25 devnull #include <u.h>
2 324891a5 2006-06-25 devnull #include <libc.h>
3 324891a5 2006-06-25 devnull #include <draw.h>
4 324891a5 2006-06-25 devnull #include <memdraw.h>
5 324891a5 2006-06-25 devnull #include <memlayer.h>
7 324891a5 2006-06-25 devnull struct Draw
9 324891a5 2006-06-25 devnull Point deltas;
10 324891a5 2006-06-25 devnull Point deltam;
11 324891a5 2006-06-25 devnull Memlayer *dstlayer;
12 324891a5 2006-06-25 devnull Memimage *src;
13 324891a5 2006-06-25 devnull Memimage *mask;
19 324891a5 2006-06-25 devnull ldrawop(Memimage *dst, Rectangle screenr, Rectangle clipr, void *etc, int insave)
21 324891a5 2006-06-25 devnull struct Draw *d;
22 324891a5 2006-06-25 devnull Point p0, p1;
23 324891a5 2006-06-25 devnull Rectangle oclipr, srcr, r, mr;
27 324891a5 2006-06-25 devnull if(insave && d->dstlayer->save==nil)
30 324891a5 2006-06-25 devnull p0 = addpt(screenr.min, d->deltas);
31 324891a5 2006-06-25 devnull p1 = addpt(screenr.min, d->deltam);
33 324891a5 2006-06-25 devnull if(insave){
34 324891a5 2006-06-25 devnull r = rectsubpt(screenr, d->dstlayer->delta);
35 324891a5 2006-06-25 devnull clipr = rectsubpt(clipr, d->dstlayer->delta);
37 324891a5 2006-06-25 devnull r = screenr;
39 324891a5 2006-06-25 devnull /* now in logical coordinates */
41 324891a5 2006-06-25 devnull /* clipr may have narrowed what we should draw on, so clip if necessary */
42 324891a5 2006-06-25 devnull if(!rectinrect(r, clipr)){
43 324891a5 2006-06-25 devnull oclipr = dst->clipr;
44 324891a5 2006-06-25 devnull dst->clipr = clipr;
45 324891a5 2006-06-25 devnull ok = drawclip(dst, &r, d->src, &p0, d->mask, &p1, &srcr, &mr);
46 324891a5 2006-06-25 devnull dst->clipr = oclipr;
50 324891a5 2006-06-25 devnull memdraw(dst, r, d->src, p0, d->mask, p1, d->op);
54 324891a5 2006-06-25 devnull memdraw(Memimage *dst, Rectangle r, Memimage *src, Point p0, Memimage *mask, Point p1, int op)
56 324891a5 2006-06-25 devnull struct Draw d;
57 324891a5 2006-06-25 devnull Rectangle srcr, tr, mr;
58 324891a5 2006-06-25 devnull Memlayer *dl, *sl;
60 324891a5 2006-06-25 devnull if(drawdebug)
61 324891a5 2006-06-25 devnull iprint("memdraw %p %R %p %P %p %P\n", dst, r, src, p0, mask, p1);
63 324891a5 2006-06-25 devnull if(mask == nil)
64 324891a5 2006-06-25 devnull mask = memopaque;
66 324891a5 2006-06-25 devnull if(mask->layer){
67 324891a5 2006-06-25 devnull if(drawdebug) iprint("mask->layer != nil\n");
68 324891a5 2006-06-25 devnull return; /* too hard, at least for now */
72 324891a5 2006-06-25 devnull if(dst->layer==nil && src->layer==nil){
73 324891a5 2006-06-25 devnull memimagedraw(dst, r, src, p0, mask, p1, op);
77 324891a5 2006-06-25 devnull if(drawclip(dst, &r, src, &p0, mask, &p1, &srcr, &mr) == 0){
78 324891a5 2006-06-25 devnull if(drawdebug) iprint("drawclip dstcr %R srccr %R maskcr %R\n", dst->clipr, src->clipr, mask->clipr);
83 324891a5 2006-06-25 devnull * Convert to screen coordinates.
85 324891a5 2006-06-25 devnull dl = dst->layer;
86 324891a5 2006-06-25 devnull if(dl != nil){
87 324891a5 2006-06-25 devnull r.min.x += dl->delta.x;
88 324891a5 2006-06-25 devnull r.min.y += dl->delta.y;
89 324891a5 2006-06-25 devnull r.max.x += dl->delta.x;
90 324891a5 2006-06-25 devnull r.max.y += dl->delta.y;
92 324891a5 2006-06-25 devnull Clearlayer:
93 324891a5 2006-06-25 devnull if(dl!=nil && dl->clear){
94 324891a5 2006-06-25 devnull if(src == dst){
95 324891a5 2006-06-25 devnull p0.x += dl->delta.x;
96 324891a5 2006-06-25 devnull p0.y += dl->delta.y;
97 324891a5 2006-06-25 devnull src = dl->screen->image;
99 324891a5 2006-06-25 devnull dst = dl->screen->image;
100 324891a5 2006-06-25 devnull goto Top;
103 324891a5 2006-06-25 devnull sl = src->layer;
104 324891a5 2006-06-25 devnull if(sl != nil){
105 324891a5 2006-06-25 devnull p0.x += sl->delta.x;
106 324891a5 2006-06-25 devnull p0.y += sl->delta.y;
107 324891a5 2006-06-25 devnull srcr.min.x += sl->delta.x;
108 324891a5 2006-06-25 devnull srcr.min.y += sl->delta.y;
109 324891a5 2006-06-25 devnull srcr.max.x += sl->delta.x;
110 324891a5 2006-06-25 devnull srcr.max.y += sl->delta.y;
114 324891a5 2006-06-25 devnull * Now everything is in screen coordinates.
115 324891a5 2006-06-25 devnull * mask is an image. dst and src are images or obscured layers.
119 324891a5 2006-06-25 devnull * if dst and src are the same layer, just draw in save area and expose.
121 324891a5 2006-06-25 devnull if(dl!=nil && dst==src){
122 324891a5 2006-06-25 devnull if(dl->save == nil)
123 324891a5 2006-06-25 devnull return; /* refresh function makes this case unworkable */
124 324891a5 2006-06-25 devnull if(rectXrect(r, srcr)){
126 324891a5 2006-06-25 devnull if(srcr.min.x < tr.min.x){
127 324891a5 2006-06-25 devnull p1.x += tr.min.x - srcr.min.x;
128 324891a5 2006-06-25 devnull tr.min.x = srcr.min.x;
130 324891a5 2006-06-25 devnull if(srcr.min.y < tr.min.y){
131 324891a5 2006-06-25 devnull p1.y += tr.min.x - srcr.min.x;
132 324891a5 2006-06-25 devnull tr.min.y = srcr.min.y;
134 324891a5 2006-06-25 devnull if(srcr.max.x > tr.max.x)
135 324891a5 2006-06-25 devnull tr.max.x = srcr.max.x;
136 324891a5 2006-06-25 devnull if(srcr.max.y > tr.max.y)
137 324891a5 2006-06-25 devnull tr.max.y = srcr.max.y;
138 324891a5 2006-06-25 devnull memlhide(dst, tr);
140 324891a5 2006-06-25 devnull memlhide(dst, r);
141 324891a5 2006-06-25 devnull memlhide(dst, srcr);
143 324891a5 2006-06-25 devnull memdraw(dl->save, rectsubpt(r, dl->delta), dl->save,
144 324891a5 2006-06-25 devnull subpt(srcr.min, src->layer->delta), mask, p1, op);
145 324891a5 2006-06-25 devnull memlexpose(dst, r);
150 324891a5 2006-06-25 devnull if(sl->clear){
151 324891a5 2006-06-25 devnull src = sl->screen->image;
152 324891a5 2006-06-25 devnull if(dl != nil){
153 324891a5 2006-06-25 devnull r.min.x -= dl->delta.x;
154 324891a5 2006-06-25 devnull r.min.y -= dl->delta.y;
155 324891a5 2006-06-25 devnull r.max.x -= dl->delta.x;
156 324891a5 2006-06-25 devnull r.max.y -= dl->delta.y;
158 324891a5 2006-06-25 devnull goto Top;
160 324891a5 2006-06-25 devnull /* relatively rare case; use save area */
161 324891a5 2006-06-25 devnull if(sl->save == nil)
162 324891a5 2006-06-25 devnull return; /* refresh function makes this case unworkable */
163 324891a5 2006-06-25 devnull memlhide(src, srcr);
164 324891a5 2006-06-25 devnull /* convert back to logical coordinates */
165 324891a5 2006-06-25 devnull p0.x -= sl->delta.x;
166 324891a5 2006-06-25 devnull p0.y -= sl->delta.y;
167 324891a5 2006-06-25 devnull srcr.min.x -= sl->delta.x;
168 324891a5 2006-06-25 devnull srcr.min.y -= sl->delta.y;
169 324891a5 2006-06-25 devnull srcr.max.x -= sl->delta.x;
170 324891a5 2006-06-25 devnull srcr.max.y -= sl->delta.y;
171 324891a5 2006-06-25 devnull src = src->layer->save;
175 324891a5 2006-06-25 devnull * src is now an image. dst may be an image or a clear layer
177 324891a5 2006-06-25 devnull if(dst->layer==nil)
178 324891a5 2006-06-25 devnull goto Top;
179 324891a5 2006-06-25 devnull if(dst->layer->clear)
180 324891a5 2006-06-25 devnull goto Clearlayer;
183 324891a5 2006-06-25 devnull * dst is an obscured layer
185 324891a5 2006-06-25 devnull d.deltas = subpt(p0, r.min);
186 324891a5 2006-06-25 devnull d.deltam = subpt(p1, r.min);
187 324891a5 2006-06-25 devnull d.dstlayer = dl;
188 324891a5 2006-06-25 devnull d.src = src;
189 324891a5 2006-06-25 devnull d.op = op;
190 324891a5 2006-06-25 devnull d.mask = mask;
191 324891a5 2006-06-25 devnull _memlayerop(ldrawop, dst, r, r, &d);
